US20100256282A1 - Powder corrosion and chip-resistant coating - Google Patents

Powder corrosion and chip-resistant coating Download PDF

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Publication number
US20100256282A1
US20100256282A1 US12/661,855 US66185510A US2010256282A1 US 20100256282 A1 US20100256282 A1 US 20100256282A1 US 66185510 A US66185510 A US 66185510A US 2010256282 A1 US2010256282 A1 US 2010256282A1
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United States
Prior art keywords
powder composition
weight
composition
powder
pigment
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Abandoned
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US12/661,855
Inventor
Jason Paul Breidenstein
Douglas S. Cinoman
Paul R. Horinka
Edward G. Nicholl
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Akzo Nobel Coatings International BV
Rohm and Haas Co
Original Assignee
Jason Paul Breidenstein
Cinoman Douglas S
Horinka Paul R
Nicholl Edward G
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Application filed by Jason Paul Breidenstein, Cinoman Douglas S, Horinka Paul R, Nicholl Edward G filed Critical Jason Paul Breidenstein
Priority to US12/661,855 priority Critical patent/US20100256282A1/en
Publication of US20100256282A1 publication Critical patent/US20100256282A1/en
Assigned to AKZO NOBEL COATINGS INTERNATIONAL B.V. reassignment AKZO NOBEL COATINGS INTERNATIONAL B.V. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ROHM AND HAAS COMPANY
Assigned to ROHM AND HAAS COMPANY reassignment ROHM AND HAAS COMPANY NUNC PRO TUNC ASSIGNMENT (SEE DOCUMENT FOR DETAILS). Assignors: BREIDENSTEIN, JASON PAUL, HORINKA, PAUL R., NICHOLL, EDWARD G., CINOMAN, DOUGLAS S.
Priority to US13/904,059 priority patent/US10344178B2/en
Priority to US15/467,556 priority patent/US20170253763A1/en
Abandoned legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/03—Powdery paints
    • C09D5/033—Powdery paints characterised by the additives
    • C09D5/038—Anticorrosion agents
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
    • F16F1/024—Covers or coatings therefor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2922—Nonlinear [e.g., crimped, coiled, etc.]
    • Y10T428/2925—Helical or coiled

Definitions

  • This invention relates to a powder composition suitable for powder coating. More particularly this invention relates to a powder composition including a resin and from 5% to 70%, by weight based on powder composition weight, of a corrosion-inhibiting pigment, the composition being substantially free from pigment providing a metallic effect. This invention also relates to a method for coating a substrate with the powder composition and a coated substrate.
  • U.S. Pat. No. 7,244,780 discloses powder coating compositions that comprise a film-forming polymer, a pigment such as aluminum flake providing a metallic effect and a stabilizing additive that inhibits degradation of the metallic pigment.
  • U.S. Pat. No. 7,018,716 discloses corrosion- and chip-resistant coatings for high tensile steel components, such as automotive coil springs, formed from a coating powder composition of “toughened” epoxy resin.
  • the entire coating is loaded with at least 75 phr zinc powder.
  • an inner coat is loaded with at least 75 phr zinc and an outer, zinc-free coating is reinforced by the addition of fibers and/or by a foaming agent which renders it porous.
  • the powder composition of the present invention is capable of exhibiting a high level of chip resistance and corrosion resistance without relying on the use of high levels of zinc metal.
  • a powder composition comprising a resin and from 5% to 70%, by weight based on powder composition weight, of a corrosion-inhibiting pigment, said composition being substantially free from pigment providing a metallic effect.
  • the corrosion-inhibiting pigment may be present in amounts of up to 50%, by weight based on powder composition weight, or up to 40%, or up to 35%.
  • a method for coating a substrate comprising: forming a powder composition comprising a resin and from 5% to 70%, by weight based on powder composition weight, of a corrosion-inhibiting pigment, said composition being substantially free from pigment providing a metallic effect; applying said powder composition to a substrate; and heating said powder composition to fuse and cure said applied composition.
  • the corrosion-inhibiting pigment may be used in amounts of up to 50%, by weight based on powder composition weight, or up to 40%, or up to 35%.
  • a method for coating a substrate comprising: forming a first powder composition comprising a resin and from 0% to 70%, by weight based on powder composition weight, of a corrosion-inhibiting pigment, said first powder composition being substantially free from pigment providing a metallic effect; applying said first powder composition to said substrate; forming a second powder composition comprising a resin and from 5% to 70%, by weight based on powder composition weight, of a corrosion-inhibiting pigment, said composition being substantially free from pigment providing a metallic effect; applying said second powder composition to said substrate coated with said first powder composition; and heating said applied powder compositions to fuse and cure said compositions.
  • the corrosion-inhibiting pigment may be present in amounts of up to 50%, by weight based on powder composition weight, or up to 40%, or up to 35%.
  • a coated substrate comprising said substrate bearing a coating comprising a resin and from 5% to 70%, by weight based on powder composition weight, of a corrosion-inhibiting pigment.
  • the coating may comprise corrosion-inhibiting pigment in amounts of up to 50%, by weight based on powder composition weight, or up to 40%, or up to 35%.
  • the powder composition of the present invention includes at least one resin, i.e., a polymeric composition suitable for powder coatings such as, for example, thermoplastic or thermoset resins, particularly an epoxy resin.
  • the epoxy resin may be chosen from a variety of epoxy resins useful for coating powders known in the art, such as those produced by the reaction of epichlorohydrin or polyglycidyl ether and an aromatic polyol such as bisphenol, e.g., bisphenol A.
  • the epoxy resin typically has an epoxy functionality greater than 1.0 and more preferably greater than 1.9.
  • the epoxy equivalent weight should be at least 170, but lower values may be acceptable in some cases.
  • the epoxy equivalent weight is less than 2300, and more preferably from 800 to 1500.
  • Such epoxy resins may be produced, for example, by an etherificiation reaction between an aromatic or aliphatic polyol and epichlorohydrin or dichlorohydrin in the presence of an alkali such as caustic soda.
  • the aromatic polyol may be, for example, bis(4-hydroxyphenyl)-2,2-propane (i.e.
  • bisphenol A bis(4-hydroxyphenyl)-1,1-ethane, bis(4-hydroxyphenyl)-1, 1-isobutane, bis(4-hydroxy-t-butylphenyl)-2,2-propane, bis(2-hydroxynaphthyl)methane, 4,4′-dihdyroxybenzophenone or 1,5-pentanediol, 1, 6-hexanediol, diethylene glycol, triethylene glycol, polyethylene glycol, polypropylene glycol or dipropylene glycol, for example diglycidyl ethers or condensed glycidyl ethers of such diols, can be used.
  • oxirane group-containing polymers that can be used as the epoxy resin in hybrid powder coating compositions according to this invention include polyglycidyl-functional acrylic polymers or epoxy novolak resins.
  • Preferred epoxy resins for use in the present invention are those based on bisphenol A.
  • the powder composition may further incorporate one or more of toughening, foaming, and reinforcing technologies.
  • “Toughening technology” herein refers to modification of the resin component to provide a tougher applied coating.
  • Fraaming technology herein refers to powder compositions selected to engender foam structure in the applied coating.
  • “Reinforcing technology” herein refers to additional components in the powder composition selected to reinforce the applied coating.
  • Epoxy resin may be toughened by the use of additives or co-reactants such as, for example, as impact modifiers, flexibilizing agents, plasticizers and tougheners. These may include:
  • tougheners may include hollow spherical particle including polymeric or glass beads.
  • Discrete microdomains of any of the above may be present and may contribute to chip resistance.
  • the epoxy resin preferably a bisphenol A resin
  • the preferred elastomer is CTBN rubber.
  • Such epoxy/CTBN rubber adducts are described, for example, in U.K. Patent Specification 1,407,851 (C. G. Taylor) published Sep. 24, 1975 and Powder Coatings, 184 “Elastomer-Modified Epoxy Powder Coatings: a Review”, Apr. 13, 1994, No. 4347.
  • the CTBN component should be present at least 5 wt % of the total of the CTBN and the epoxy components. Above about 25 wt % CTBN, no further benefit is realized and it is not desired to exceed 25 wt % lest there be insufficient epoxy component for a good cure.
  • a core/shell resin in which an acrylic rubber resin forms the core and the epoxy resin, preferably a bisphenol A epoxy resin, forms the shell.
  • an acrylic rubber resin forms the core
  • the epoxy resin preferably a bisphenol A epoxy resin
  • chemical bonding between carboxylic functionality of the acrylic rubber resin of the core and the epoxy resin of the shell prevents phase separation during fusion and curing of the coating powder formed using the core/shell resin.
  • acrylic rubber modified epoxies are described, for example, in Polymer Reprints, 32(3), pp. 358-9 by H-J Sue and E. I. Garcia-Melfin.
  • thermosetting epoxy resins may include either a cross-linking agent, such as a polyhydroxyl compound or a cure catalyst to effect auto-cross-linking of the epoxy resin.
  • a cross-linking agent such as a polyhydroxyl compound or a cure catalyst to effect auto-cross-linking of the epoxy resin.
  • the epoxy resin is cured with a polyhydroxyl functionality having a relatively high hydroxy equivalent weight, i.e., at least about 200 up to about 500, preferably at least about 300.
  • the relatively high hydroxy equivalent weight of the cross-linking agent ensures relatively long chain length between OH groups, which chain lengths provide flexibility to the cured coating, helping to render the coatings chip-resistant.
  • Suitable curing agents useful in the practice of this invention are exemplified by phenolic curing agents, such as a bisphenol A end capped diglycidyl ether of bisphenol A, which is the reaction product of a diglycidyl ether of bisphenol A and bisphenol A and polyester resins with free carboxylic acid groups that are known to form “Hybrid” powder coatings.
  • phenolic curing agents such as a bisphenol A end capped diglycidyl ether of bisphenol A, which is the reaction product of a diglycidyl ether of bisphenol A and bisphenol A and polyester resins with free carboxylic acid groups that are known to form “Hybrid” powder coatings.
  • preferred phenolic curing agents for the epoxy resin component include those sold under the trademarks D.E.H.TM87 and D.E.H.TM85 (Dow Chemical Co.), both of which are believed to be bisphenol A end capped diglycidyl ethers of bisphenol A.
  • epoxy crosslinking agents include, for example:
  • the powder composition of the present invention is a resin-based composition that includes from 5% to 70%, by weight based on powder composition weight, of a corrosion-inhibiting pigment.
  • the corrosion-inhibiting pigment may be, for example, at least one of:
  • the pigments may be present in their basic form, may be organic modified, and may be present as the hydrate.
  • Other descriptions of suitable corrosion-inhibiting pigments appear in U.S. Pat. No. 3,884,705 and are summarized by G.B. Rothenberg in Paint Additives, Noyes Data Corp, 1978, pp 175-177.
  • U.S. Pat. No. 7,244,780 also discloses corrosion-inhibiting pigments that include “a source of stabilizing anions, advantageously phosphate ions, capable of dissolving in the presence of water”.
  • Zinc phosphate herein is contemplated to include (a) Zinc phosphate di- or tetra-hydrate, preferably in the form of spheroidal particles as described in U.S. Pat. No. 5,137,567 (an example of zinc phosphate dihydrate being the material available under the trade name DELAPHOSTM 2M and a further example of a zinc phosphate being the available under the trade name HISPAFOSTM SP, comprising spheric particles of narrow particle size distribution); (b) Spheroidal zinc phosphate as a crystalline phase in admixture with an amorphous phase comprising Fe(II) phosphate and Fe(III) phosphate. Further information concerning such materials may be found in U.S. Pat. No. 5,030,285; and (c) Zinc phosphate (preferably in spheroidal form) modified with zinc molybdate (such as ACTIROXTM106; Microfine Minerals Ltd.)
  • the powder composition optionally includes from 0% to 65%, by weight based on powder composition weight, zinc; typically the zinc is in powder or flake form.
  • the powder composition includes a minimal amount of zinc; more preferably the powder composition is free from zinc.
  • the powder composition of the present invention is “substantially free from pigment providing a metallic effect”, which means that the total proportion of metallic pigment(s) incorporated in the powder coating composition shall be less than 0.1 by weight (based on the weight of the composition without the metallic pigment(s)); preferably no metallic pigment is included in the powder composition.
  • a pigment providing a metallic effect herein is meant a metallic pigment typically in flake form such as, for example, aluminium or an aluminium alloy or another metal or alloy, for example, stainless steel, copper, tin, bronze or brass typically used to produce various metallic effects including those referred to as “metallic”, “effect”, “lustre”, or “glamour” finishes.
  • the metallic pigment may be an uncoated or coated material.
  • coated materials include pigments coated with silica or another inert inorganic material for greater chemical resistance and durability.
  • the pigment may be coated with a plastics material for similar purposes, for example, an acrylic, PTFE or thermosetting plastics material, or may be provided in a polymer or plasticizer which is compatible with the film-forming binder of the powder coating composition.
  • the metallic pigment may be coated with a coloring agent such as a metal oxide pigment such as, for example, iron oxide, to provide special color effects.
  • Powder compositions used to provide the chip-resistant and corrosion-resistant coatings of the present invention are produced in the usual manner.
  • the components are blended, and then are melt-compounded with heating above the melting point of the resin for a short time, e.g., 30 to 90 sec., so that no significant curing occurs.
  • the molten compound is extruded, and after extrusion, the composition is rapidly cooled.
  • the composition is then ground and, as necessary, the particulates sorted according to size.
  • the particles are generally in the 5 to 100 micron size range with a major portion generally being in the 20 to 40 micron size range. Larger particulates are useful for fluidized bed coating operations.
  • the powder composition of the present invention is applied to the substrate and heated to fuse and cure the applied composition.
  • the substrate is a metal substrate, typically a steel substrate, wherein the powder composition may be may be used, for example, as a pipe coating, rebar coating, or a coating for agricultural or construction equipment.
  • the substrate is a high tensile steel substrate such as is suitable for use, for example, in coil springs in the transportation industry.
  • high tensile steel is defined as having MPa (megapascal (N/m 2 ) ranging from 1800 Mpa to 2100 Mpa or above; this includes super high tensile steel from 1950 Mpa to 2100 Mpa or above.
  • Steel substrates herein are contemplated to include pretreated steel substrates, including treatments of, for example, zinc phosphate, iron phosphate, and dry in place pretreatment technology.
  • the powder composition is typically heated at a temperature of greater than 149° C. (300° F.) for a time sufficient to fuse and substantially cure the coating such as, for example, by placing into an electric air circulating oven maintained at 160° C. (320° F.) for 20 minutes for a cured film thickness of 50 to 101 ⁇ m (2.0-4.0 mils). It is understood that thermoplastic resins do not include a cure mechanism and therefore will only fuse under heating.
  • the powder composition may be applied as a single coat, with sufficient film thickness for chip resistance protection.
  • the powder composition may be applied as a single foamed coat, the foam having been engendered by the use of a separate foaming agent or by the temperature-dependent inherent foaming of certain phosphate and related constituents such as, for example, zinc phosphate.
  • the powder composition may incorporate reinforcing technology, that is, the composition may include carbon fibers, slip agents, barium sulfate, calcium carbonate, wollastonite, or any materials that will reinforce the coating to enhance chip resistance.
  • a two coat method may be employed.
  • a first coat (base coat) is applied and the basecoat may be partially or fully cured.
  • a subsequent second coat (top coat) is applied to the base coat and the coats are fused and cured.
  • Either of the first coat, the second coat, or both first and second coats may independently be foamed coats as described hereinabove.
  • Either of the first coat, the second coat, or both first and second coats may independently include carbon fibers, slip agents, barium sulfate, calcium carbonate, wollastonite, or any materials that will reinforce the coating to enhance chip resistance.
  • the steel cleaning and “pretreatment” or passivation step may introduce and or include foam forming components which generate a cellular structure within the pretreatment layer or the organic layer above it as evolved gases percolate through the film during heating.
  • foam forming components which generate a cellular structure within the pretreatment layer or the organic layer above it as evolved gases percolate through the film during heating.
  • gas generators are azo compounds, well known in the industry.
  • foam may also be produced by simple decomposition or dehydration of the pretreatment chemicals themselves.
  • Zinc phosphate (hopeite and/or phosphyllite) for example, having been deposited on cold rolled steel panels, has been shown to foam by heating to approximately 200° C.
  • the coated substrate of the present invention bears a coating including a resin and from 5% to 70%, by weight, based on powder composition weight, of a corrosion-inhibiting pigment, optionally further including from 0% to 65%, by weight based on powder composition weight, zinc, the composition being substantially free from pigment providing a metallic effect. It is formed by the above-described method of the present invention.
  • Powder samples were electrostatically applied onto 7.68 cm ⁇ 12.8 cm ⁇ 0.082 cm (3 inch ⁇ 5 inch ⁇ 0.032 inch) steel panels. Panels were supplied by ACT Laboratories, Inc., B-958, P-60 (Zinc Phosphate/Non Chrome Rinse). Powder coated panels were placed into an electric air circulating oven maintained at 160° C. (320° F.) for 20 minutes. Cured film thickness was 50 to 101 ⁇ m (2.0-4.0 mils).
  • Each of the coated panels exhibited a direct/reverse impact rating of 1.84 kg-m (160 in-lb)/1.84 kg-m (160 in-lb).
  • Example 1 The coated panels of Example 1 were scribed with an ‘X’ and placed in a Salt Fog Cabinet According to ASTM Method B 117. At intervals panels were removed from the cabinet and scraped with a dull knife, perpendicularly to scribed lines. Maximum undercutting (corrosion) was measured in inches outwardly from the scribe line. Panels were typically exposed for 3000 to 4000 hours.

Abstract

A powder composition including a resin and from 5% to 70%, by weight based on powder composition weight, of a corrosion-inhibiting pigment, optionally including from 0% to 65%, by weight based on powder composition weight, zinc, the composition being substantially free from pigment providing a metallic effect is provided. The corrosion-inhibiting pigment may be present in amounts of up to 50%, by weight based on powder composition weight, for example, up to 35%. A method for coating a substrate with the powder composition and the coated substrate so formed are also provided.

Description

  • This application claims the benefit of priority under 35 U.S.C. §119(e) of U.S. Provisional Patent Application No. 61/211, 847 filed on Apr. 3, 2009.
  • This invention relates to a powder composition suitable for powder coating. More particularly this invention relates to a powder composition including a resin and from 5% to 70%, by weight based on powder composition weight, of a corrosion-inhibiting pigment, the composition being substantially free from pigment providing a metallic effect. This invention also relates to a method for coating a substrate with the powder composition and a coated substrate.
  • U.S. Pat. No. 7,244,780 discloses powder coating compositions that comprise a film-forming polymer, a pigment such as aluminum flake providing a metallic effect and a stabilizing additive that inhibits degradation of the metallic pigment.
  • U.S. Pat. No. 7,018,716 discloses corrosion- and chip-resistant coatings for high tensile steel components, such as automotive coil springs, formed from a coating powder composition of “toughened” epoxy resin. In a single coat embodiment, the entire coating is loaded with at least 75 phr zinc powder. In a dual coat embodiment, an inner coat is loaded with at least 75 phr zinc and an outer, zinc-free coating is reinforced by the addition of fibers and/or by a foaming agent which renders it porous.
  • There has been a need for a powder composition suitable for coating a substrate, particularly a steel substrate such as, for example, high tensile steel wherein a coating formed from the composition exhibits a high level of chip resistance and corrosion resistance without relying on the use of high levels of zinc metal. The powder composition of the present invention is capable of exhibiting a high level of chip resistance and corrosion resistance without relying on the use of high levels of zinc metal.
  • In a first aspect of the present invention, there is provided a powder composition comprising a resin and from 5% to 70%, by weight based on powder composition weight, of a corrosion-inhibiting pigment, said composition being substantially free from pigment providing a metallic effect. The corrosion-inhibiting pigment may be present in amounts of up to 50%, by weight based on powder composition weight, or up to 40%, or up to 35%.
  • In a second aspect of the present invention there is provided a method for coating a substrate comprising: forming a powder composition comprising a resin and from 5% to 70%, by weight based on powder composition weight, of a corrosion-inhibiting pigment, said composition being substantially free from pigment providing a metallic effect; applying said powder composition to a substrate; and heating said powder composition to fuse and cure said applied composition. The corrosion-inhibiting pigment may be used in amounts of up to 50%, by weight based on powder composition weight, or up to 40%, or up to 35%.
  • In a third aspect of the present invention there is provided a method for coating a substrate comprising: forming a first powder composition comprising a resin and from 0% to 70%, by weight based on powder composition weight, of a corrosion-inhibiting pigment, said first powder composition being substantially free from pigment providing a metallic effect; applying said first powder composition to said substrate; forming a second powder composition comprising a resin and from 5% to 70%, by weight based on powder composition weight, of a corrosion-inhibiting pigment, said composition being substantially free from pigment providing a metallic effect; applying said second powder composition to said substrate coated with said first powder composition; and heating said applied powder compositions to fuse and cure said compositions. In each of the first and second powder compositions, the corrosion-inhibiting pigment may be present in amounts of up to 50%, by weight based on powder composition weight, or up to 40%, or up to 35%.
  • In a fourth aspect of the present invention there is provided a coated substrate comprising said substrate bearing a coating comprising a resin and from 5% to 70%, by weight based on powder composition weight, of a corrosion-inhibiting pigment. The coating may comprise corrosion-inhibiting pigment in amounts of up to 50%, by weight based on powder composition weight, or up to 40%, or up to 35%.
  • The powder composition of the present invention includes at least one resin, i.e., a polymeric composition suitable for powder coatings such as, for example, thermoplastic or thermoset resins, particularly an epoxy resin. The epoxy resin may be chosen from a variety of epoxy resins useful for coating powders known in the art, such as those produced by the reaction of epichlorohydrin or polyglycidyl ether and an aromatic polyol such as bisphenol, e.g., bisphenol A. The epoxy resin typically has an epoxy functionality greater than 1.0 and more preferably greater than 1.9. Generally the epoxy equivalent weight should be at least 170, but lower values may be acceptable in some cases. Preferably the epoxy equivalent weight is less than 2300, and more preferably from 800 to 1500. Such epoxy resins may be produced, for example, by an etherificiation reaction between an aromatic or aliphatic polyol and epichlorohydrin or dichlorohydrin in the presence of an alkali such as caustic soda. The aromatic polyol may be, for example, bis(4-hydroxyphenyl)-2,2-propane (i.e. bisphenol A), bis(4-hydroxyphenyl)-1,1-ethane, bis(4-hydroxyphenyl)-1, 1-isobutane, bis(4-hydroxy-t-butylphenyl)-2,2-propane, bis(2-hydroxynaphthyl)methane, 4,4′-dihdyroxybenzophenone or 1,5-pentanediol, 1, 6-hexanediol, diethylene glycol, triethylene glycol, polyethylene glycol, polypropylene glycol or dipropylene glycol, for example diglycidyl ethers or condensed glycidyl ethers of such diols, can be used. Other oxirane group-containing polymers that can be used as the epoxy resin in hybrid powder coating compositions according to this invention include polyglycidyl-functional acrylic polymers or epoxy novolak resins. Preferred epoxy resins for use in the present invention are those based on bisphenol A.
  • The powder composition may further incorporate one or more of toughening, foaming, and reinforcing technologies. “Toughening technology” herein refers to modification of the resin component to provide a tougher applied coating. “Foaming technology” herein refers to powder compositions selected to engender foam structure in the applied coating. “Reinforcing technology” herein refers to additional components in the powder composition selected to reinforce the applied coating.
  • Epoxy resin may be toughened by the use of additives or co-reactants such as, for example, as impact modifiers, flexibilizing agents, plasticizers and tougheners. These may include:
      • elastomeric modifications, either within the base polymer, reacted into the coating composition through cross-linking, or as unreacted additives, such as, for example, CTBN rubber, butadiene/styrene, nitrile, neoprene, acrylic, butyl, ethylene/propylene/diene, polysulfide, polyisoprene, silicone, and urethane rubber;
      • random or block copolymer addition which offer some degree of internal plastication and may be exemplified by the FORTEGA™ products (Dow Chemical Co.);
      • addition of plasticizers such as epoxidized soybean oil;
      • crosslinked or noncrosslinked core/shell resins with various compositions such as epoxy, acrylic, polyurethane representing either the core or the shell portion.
  • Further, tougheners may include hollow spherical particle including polymeric or glass beads.
  • Discrete microdomains of any of the above may be present and may contribute to chip resistance.
  • In one embodiment the epoxy resin, preferably a bisphenol A resin, is adducted to an elastomer having a Tg of −30° C. or below, preferably −40° C. or below. The preferred elastomer is CTBN rubber. Such epoxy/CTBN rubber adducts are described, for example, in U.K. Patent Specification 1,407,851 (C. G. Taylor) published Sep. 24, 1975 and Powder Coatings, 184 “Elastomer-Modified Epoxy Powder Coatings: a Review”, Apr. 13, 1994, No. 4347. To provide the toughening (flexibilizing) for cold-temperature chip resistance, the CTBN component should be present at least 5 wt % of the total of the CTBN and the epoxy components. Above about 25 wt % CTBN, no further benefit is realized and it is not desired to exceed 25 wt % lest there be insufficient epoxy component for a good cure. The fact that the elastomer component is chemically bound to the epoxy component, i.e., by esterification reaction of the carboxyl groups of the CTBN with epoxy groups, ensures that a complete phase separation does not occur during fusion and curing of the coating powder. However, there are microdomains of epoxy and rubber.
  • In an alternative embodiment, a core/shell resin is used in which an acrylic rubber resin forms the core and the epoxy resin, preferably a bisphenol A epoxy resin, forms the shell. Again, chemical bonding between carboxylic functionality of the acrylic rubber resin of the core and the epoxy resin of the shell prevents phase separation during fusion and curing of the coating powder formed using the core/shell resin. Such acrylic rubber modified epoxies are described, for example, in Polymer Reprints, 32(3), pp. 358-9 by H-J Sue and E. I. Garcia-Melfin.
  • In another embodiment thermosetting epoxy resins may include either a cross-linking agent, such as a polyhydroxyl compound or a cure catalyst to effect auto-cross-linking of the epoxy resin. For example, the epoxy resin is cured with a polyhydroxyl functionality having a relatively high hydroxy equivalent weight, i.e., at least about 200 up to about 500, preferably at least about 300. The relatively high hydroxy equivalent weight of the cross-linking agent ensures relatively long chain length between OH groups, which chain lengths provide flexibility to the cured coating, helping to render the coatings chip-resistant. Suitable curing agents useful in the practice of this invention are exemplified by phenolic curing agents, such as a bisphenol A end capped diglycidyl ether of bisphenol A, which is the reaction product of a diglycidyl ether of bisphenol A and bisphenol A and polyester resins with free carboxylic acid groups that are known to form “Hybrid” powder coatings. Examples of preferred phenolic curing agents for the epoxy resin component include those sold under the trademarks D.E.H.™87 and D.E.H.™85 (Dow Chemical Co.), both of which are believed to be bisphenol A end capped diglycidyl ethers of bisphenol A. Other classes of phenolic hardeners can be used as well such as phenol- and cresol-novolac curing agents sold by Dow Chemical Co. Hexion Specialty Chemicals.
  • Other epoxy crosslinking agents include, for example:
      • amines, including multifunctional aliphatic or aromatic primary or secondary amines, such as dicyandiamide, diaminodiphenyl sulfone;
      • tertiary amines which promote self cross-linking such as DMP 30 (Dow Chemical Co.);
      • boron trihalides and salts thereof such as the monoethanolamine salt of boron trifluoride;
      • Organic acid salts such as VESTAGON™B55 and VESTAGON™B68 (Degussa Corp.);
      • di and poly anhydrides such as benzophenonetetracarboxylic dianhydride (BTDA);
      • di and poly phenols such as methylene disalicylic acid; and,
      • imidazoles, substituted imidazoles and epoxy imidazole adducts such as 2-methyl imidazole or DEH 40 (Dow Chemical Co.).
  • The powder composition of the present invention is a resin-based composition that includes from 5% to 70%, by weight based on powder composition weight, of a corrosion-inhibiting pigment. The corrosion-inhibiting pigment may be, for example, at least one of:
      • simple molybdates such as zinc molybdate, strontium molybdate and complex molybdates such as calcium zinc molybdate, calcium zinc phosphomolybdate (eg., MOLYWHITE™ MZAP);
      • simple chromates such as zinc chromate, barium chromate, strontium chromate, magnesium chromate, calcium chromate and complex chromates such as lead silico chromate, zinc tetraoxy chromate;
      • metal phosphides such as iron phosphide (e.g. FERROPHOS™ iron phosphide, OCCIDENTAL CHEMICAL CORP., Dallas, Tex.);
      • silicates such as zinc phosphosilicate and calcium borosilicate; and
      • simple phosphates such as iron phosphate, zinc phosphate, zinc pyrophosphate, calcium hydrogen phosphate and complex phosphates such as zinc borate orthophosphate, strontium aluminum polyphosphate, zinc aluminum polyphosphate, zinc aluminum molybdenum orthophosphate, zinc aluminum orthophosphate.
  • The pigments may be present in their basic form, may be organic modified, and may be present as the hydrate. Other descriptions of suitable corrosion-inhibiting pigments appear in U.S. Pat. No. 3,884,705 and are summarized by G.B. Rothenberg in Paint Additives, Noyes Data Corp, 1978, pp 175-177. U.S. Pat. No. 7,244,780 also discloses corrosion-inhibiting pigments that include “a source of stabilizing anions, advantageously phosphate ions, capable of dissolving in the presence of water”.
  • Zinc phosphate herein is contemplated to include (a) Zinc phosphate di- or tetra-hydrate, preferably in the form of spheroidal particles as described in U.S. Pat. No. 5,137,567 (an example of zinc phosphate dihydrate being the material available under the trade name DELAPHOS™ 2M and a further example of a zinc phosphate being the available under the trade name HISPAFOS™ SP, comprising spheric particles of narrow particle size distribution); (b) Spheroidal zinc phosphate as a crystalline phase in admixture with an amorphous phase comprising Fe(II) phosphate and Fe(III) phosphate. Further information concerning such materials may be found in U.S. Pat. No. 5,030,285; and (c) Zinc phosphate (preferably in spheroidal form) modified with zinc molybdate (such as ACTIROX™106; Microfine Minerals Ltd.)
  • The powder composition optionally includes from 0% to 65%, by weight based on powder composition weight, zinc; typically the zinc is in powder or flake form. Preferably the powder composition includes a minimal amount of zinc; more preferably the powder composition is free from zinc.
  • The powder composition of the present invention is “substantially free from pigment providing a metallic effect”, which means that the total proportion of metallic pigment(s) incorporated in the powder coating composition shall be less than 0.1 by weight (based on the weight of the composition without the metallic pigment(s)); preferably no metallic pigment is included in the powder composition. By “a pigment providing a metallic effect” herein is meant a metallic pigment typically in flake form such as, for example, aluminium or an aluminium alloy or another metal or alloy, for example, stainless steel, copper, tin, bronze or brass typically used to produce various metallic effects including those referred to as “metallic”, “effect”, “lustre”, or “glamour” finishes.
  • The metallic pigment may be an uncoated or coated material. Examples of coated materials include pigments coated with silica or another inert inorganic material for greater chemical resistance and durability. Alternatively, the pigment may be coated with a plastics material for similar purposes, for example, an acrylic, PTFE or thermosetting plastics material, or may be provided in a polymer or plasticizer which is compatible with the film-forming binder of the powder coating composition. As a further possibility, the metallic pigment may be coated with a coloring agent such as a metal oxide pigment such as, for example, iron oxide, to provide special color effects.
  • Powder compositions used to provide the chip-resistant and corrosion-resistant coatings of the present invention are produced in the usual manner. The components are blended, and then are melt-compounded with heating above the melting point of the resin for a short time, e.g., 30 to 90 sec., so that no significant curing occurs. The molten compound is extruded, and after extrusion, the composition is rapidly cooled. The composition is then ground and, as necessary, the particulates sorted according to size. For electrostatic coating, the particles are generally in the 5 to 100 micron size range with a major portion generally being in the 20 to 40 micron size range. Larger particulates are useful for fluidized bed coating operations.
  • In the method for coating a substrate of the present invention the powder composition of the present invention is applied to the substrate and heated to fuse and cure the applied composition. In one embodiment the substrate is a metal substrate, typically a steel substrate, wherein the powder composition may be may be used, for example, as a pipe coating, rebar coating, or a coating for agricultural or construction equipment. In another embodiment the substrate is a high tensile steel substrate such as is suitable for use, for example, in coil springs in the transportation industry. Herein, high tensile steel is defined as having MPa (megapascal (N/m2) ranging from 1800 Mpa to 2100 Mpa or above; this includes super high tensile steel from 1950 Mpa to 2100 Mpa or above. Steel substrates herein are contemplated to include pretreated steel substrates, including treatments of, for example, zinc phosphate, iron phosphate, and dry in place pretreatment technology. The powder composition is typically heated at a temperature of greater than 149° C. (300° F.) for a time sufficient to fuse and substantially cure the coating such as, for example, by placing into an electric air circulating oven maintained at 160° C. (320° F.) for 20 minutes for a cured film thickness of 50 to 101 μm (2.0-4.0 mils). It is understood that thermoplastic resins do not include a cure mechanism and therefore will only fuse under heating.
  • In the method for coating a substrate of the present invention the powder composition may be applied as a single coat, with sufficient film thickness for chip resistance protection. In an alternative embodiment the powder composition may be applied as a single foamed coat, the foam having been engendered by the use of a separate foaming agent or by the temperature-dependent inherent foaming of certain phosphate and related constituents such as, for example, zinc phosphate. Optionally, the powder composition may incorporate reinforcing technology, that is, the composition may include carbon fibers, slip agents, barium sulfate, calcium carbonate, wollastonite, or any materials that will reinforce the coating to enhance chip resistance.
  • In an alternative method of the present invention a two coat method may be employed. In such embodiments a first coat (base coat) is applied and the basecoat may be partially or fully cured. Then a subsequent second coat (top coat) is applied to the base coat and the coats are fused and cured. Either of the first coat, the second coat, or both first and second coats, independently, is formed from the powder composition of the present invention. Either of the first coat, the second coat, or both first and second coats may independently be foamed coats as described hereinabove. Either of the first coat, the second coat, or both first and second coats may independently include carbon fibers, slip agents, barium sulfate, calcium carbonate, wollastonite, or any materials that will reinforce the coating to enhance chip resistance.
  • The introduction of cellular foam structures is not limited to the organic portion of the protective system. For example, the steel cleaning and “pretreatment” or passivation step may introduce and or include foam forming components which generate a cellular structure within the pretreatment layer or the organic layer above it as evolved gases percolate through the film during heating. Examples of such gas generators are azo compounds, well known in the industry. Such foam may also be produced by simple decomposition or dehydration of the pretreatment chemicals themselves. Zinc phosphate (hopeite and/or phosphyllite), for example, having been deposited on cold rolled steel panels, has been shown to foam by heating to approximately 200° C.
  • The coated substrate of the present invention bears a coating including a resin and from 5% to 70%, by weight, based on powder composition weight, of a corrosion-inhibiting pigment, optionally further including from 0% to 65%, by weight based on powder composition weight, zinc, the composition being substantially free from pigment providing a metallic effect. It is formed by the above-described method of the present invention.
    • EXAMPLE 1 Formation of Powder Compositions and Application to Substrates
  • TABLE 1.1A
    Powder compositions
    Zinc Phosphate-Containing Base Coat compositions
    Example No.
    1-1 1-2 1-3 1-4 2-1
    5% 10% 20% 30% 44%
    Zn3(PO4)2 Zn3(PO4)2 Zn3(PO4)2 Zn3(PO4)2 Zn3(PO4)2
    Epoxy resin A 92 92 92 92 92
    Imidazole 3 3 3 3 3
    adduct B
    Carbon black 3 3 3 3 3
    pigment
    Hydroxy 20.8 20.8 20.8 20.8 20.8
    compound C
    Epoxy resin D 8 8 8 8 8
    Zinc Dust 0 0 0 0 0
    Zinc Phosphate 6.7 14.5 32 54 100
    Fumed silica 0.30% 0.30% 0.30% 0.30% 0.30%
    Other Corrosion-Inhibiting Base Coat compositions
    3-1 3-2 3-3 3-4 3-5
    Epoxy resin A1 92 92 92 92 92
    Imidazole adduct 3 3 3 3 3
    B2
    Carbon black 3 3 3 3 3
    pigment
    Hydroxy 20.8 20.8 20.8 20.8 20.8
    compound C3
    Epoxy resin D4 8 8 8 8 8
    Zinc Dust 237.5 225 200 175 150
    Zinc Phosphate 0 0 0 0 0
    FERROPHOS ™ 12.5 25 50 75 100
    Strontium Zinc 0 0 0 0 0
    Phosphosilicate
    Calcium 0 0 0 0 0
    Borosilicate
    Fumed Silica 0.30% 0.30% 0.30% 0.30% 0.30%
    1Diglycidyl ether of bisphenol A epoxy resin with a weight per epoxide between 935 and 1175.
    2Imidazole adduct with a diglycidyl ether of bisphenol A epoxy resin.
    3Bisphenol A end capped diglycidyl ether of bisphenol A with a hydroxyl equivalent weight between 370 and 400.
    4Master Batch epoxy resin containing 90 wt % of a diglycidyl ether of bisphenol A epoxy resin with a weight per epoxide between 795 and 895 and 10 wt % of acrylic flow modifier.
  • TABLE 1.1B
    Powder compositions
    Zinc Phosphate-Containing Base Coat compositions
    Example No.
    2-2
    44%
    Zn3(PO4)2 2-3 2-4 2-5 2-6 Control
    Epoxy resin A 92 92 92 92 92 92
    Imidazole adduct B 3 3 3 3 3 3
    Carbon black 3 3 3 3 3 3
    pigment
    Hydroxy 20.8 20.8 20.8 20.8 20.8 20.8
    compound C
    Epoxy resin D 8 8 8 8 8 8
    Zinc Dust 150 175 200 225 237 250
    Zinc Phosphate 100 75 50 25 12.5 0
    Fumed silica 0.30% 0.30% 0.30% 0.30% 0.30% 0.30%
    Other Corrosion-Inhibiting Base Coat compositions
    4-1 4-2 4-3 4-4
    Epoxy resin A1 92 92 92 92
    Imidazole adduct B2 3 3 3 3
    Carbon black 3 3 3 3
    pigment
    Hydroxy 20.8 20.8 20.8 20.8
    compound C3
    Epoxy resin D4 8 8 8 8
    Zinc Dust 0 0 0 0
    Zinc Phosphate 0 0 0 0
    FERROPHOS ™ 0 0 0 0
    Strontium Zinc 3.2 14 0 0
    Phosphosilicate
    Calcium Borosilicate 0 0 6.7 22.4
    Fumed Silica 0.30% 0.30% 0.30% 0.30%
    1Diglycidyl ether of bisphenol A epoxy resin with a weight per epoxide between 935 and 1175.
    2Imidazole adduct with a diglycidyl ether of bisphenol A epoxy resin.
    3Bisphenol A end capped diglycidyl ether of bisphenol A with a hydroxyl equivalent weight between 370 and 400.
    4Master Batch epoxy resin containing 90 wt % of a diglycidyl ether of bisphenol A epoxy resin with a weight per epoxide between 795 and 895 and 10 wt % of acrylic flow modifier.
  • Powder samples were electrostatically applied onto 7.68 cm×12.8 cm×0.082 cm (3 inch×5 inch×0.032 inch) steel panels. Panels were supplied by ACT Laboratories, Inc., B-958, P-60 (Zinc Phosphate/Non Chrome Rinse). Powder coated panels were placed into an electric air circulating oven maintained at 160° C. (320° F.) for 20 minutes. Cured film thickness was 50 to 101 μm (2.0-4.0 mils).
    • EXAMPLE 2 Evaluation of Powder Coated Panels
  • Each of the coated panels exhibited a direct/reverse impact rating of 1.84 kg-m (160 in-lb)/1.84 kg-m (160 in-lb).
  • The coated panels of Example 1 were scribed with an ‘X’ and placed in a Salt Fog Cabinet According to ASTM Method B 117. At intervals panels were removed from the cabinet and scraped with a dull knife, perpendicularly to scribed lines. Maximum undercutting (corrosion) was measured in inches outwardly from the scribe line. Panels were typically exposed for 3000 to 4000 hours.
  • As shown in Table 2.1, below, the powder composition-coated panels of the present invention, Examples 1-1, 1-2, 1-3, 1-4, and 2-1, exhibited a useful level of impact resistance and salt spray corrosion resistance.
  • TABLE 2.1
    Creepback from X-scribe during ASTM B 117 Salt Spray Exposure
    Example No.
    Comparative 1-1 1-2 1-3 1-4 2-1
    HOURS 66% Zn 5% 10% 20% 30% 44%
    EXPOSED Dust Zn3(PO4)2 Zn3(PO4)2 Zn3(PO4)2 Zn3(PO4)2 Zn3(PO4)2
    192 NC NC NC NC NC NC
    384 NC NC NC NC NC NC
    552 NC NC NC NC NC NC
    672 NC NC NC NC NC NC
    840 NC NC NC NC NC NC
    1008 NC < 1/32″ < 1/32″ < 1/32″ < 1/32′ < 1/32″
    1176 NC NC < 1/32″ < 1/32″ < 1/32′ NC
    1344 NC < 1/32″ < 1/32″ < 1/32″ < 1/32′ < 1/32″
    1512 NC < 1/32″ < 1/32″ < 1/32″ < 1/32′ < 1/32″
    1680 < 1/32″ < 1/32″ < 1/32″ < 1/32″ < 1/32′ < 1/32″
    1848 < 1/32″ < 1/32″    1/32″    1/32″ < 1/32′ < 1/32″
    2016 < 1/32″    1/32″    1/32″    1/32″    1/32″    1/32″
    2184 < 1/32″    1/32″    1/32″    1/32″ < 1/32″ < 1/32″
    2352 < 1/32″    1/32″    1/32″    1/32″    1/32′ < 1/32″
    2520 < 1/32″ > 1/32″    1/16″    1/32″ > 1/32″ < 1/32″
    2688 < 1/32″    1/16″    1/16″    1/16″    1/16′    1/32″
    2856 < 1/32″    1/16″ > 1/16″    1/16″    1/16′    1/16″
    3024 < 1/32″    1/16″    3/32″    3/32″    3/32″    1/16″
    3192 < 1/32″    1/16″    3/32″    3/32″    3/32″    1/16″
    3360    1/32″    3/32″   ⅛″ > 3/32″    3/32″    1/16″
    3528    1/32″    3/32″   ⅛″   ⅛″    3/32″    1/16″
    3696    1/32″    3/32″   ⅛″   ⅛″    3/32″    1/16″
    3864    1/32″   ⅛″    3/16″   ⅛″   ⅛″    1/16″
    4056    1/16″   ⅛″ >¼″    3/16″    3/16″    3/32″

Claims (10)

1. A powder composition comprising a resin and from 5% to 70%, by weight based on powder composition weight, of a corrosion-inhibiting pigment, said composition being substantially free from pigment providing a metallic effect.
2. The composition according to claim 1 further comprising from 0% to 65%, by weight based on powder composition weight, zinc.
3. The composition according to claim 1 further comprises at least one technology selected from the group consisting of toughening, foaming, and reinforcing.
4. A method for coating a substrate comprising:
forming a powder composition comprising a resin and from 5% to 70%, by weight based on powder composition weight, of a corrosion-inhibiting pigment, said composition being substantially free from pigment providing a metallic effect;
applying said powder composition to said substrate; and
heating said applied powder composition to fuse and cure said composition.
5. The method according to claim 3 wherein said powder composition further comprises from 0% to 65%, by weight based on powder composition weight, zinc.
6. The method according to claim 3 wherein said powder composition further comprises at least one technology selected from the group consisting of toughening, foaming, and reinforcing.
7. A method for coating a substrate comprising:
forming a first powder composition comprising a resin and from 0% to 70%, by weight based on powder composition weight, of a corrosion-inhibiting pigment, said first powder composition being substantially free from pigment providing a metallic effect;
applying said first powder composition to said substrate;
forming a second powder composition comprising a resin and from 5% to 70%, by weight based on powder composition weight, of a corrosion-inhibiting pigment, said composition being substantially free from pigment providing a metallic effect;
applying said second powder composition to said substrate coated with said first powder composition; and
heating said applied powder compositions to fuse and cure said compositions.
8. The method according to claim 7 wherein said first and said second powder composition, independently, further comprise from 0% to 65%, by weight based on powder composition weight, zinc.
9. A coated substrate comprising said substrate bearing a coating comprising
a resin and from 5% to 70%, by weight based on powder composition weight, of a corrosion-inhibiting pigment, said composition being substantially free from pigment providing a metallic effect.
10. The coated substrate of claim 9 wherein said powder composition further comprises from 0% to 65%, by weight based on powder composition weight, zinc.
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US20090110934A1 (en) * 2007-10-31 2009-04-30 Cinoman Douglas S Thin chip resistant powder topcoats for steel
US20100297422A1 (en) * 2008-01-25 2010-11-25 Akzo Nobel Coatings International B.V. Powder coating compositions having a substantially non-zinc containing primer
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Citations (72)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3170890A (en) * 1961-08-24 1965-02-23 Dow Corning Powders for fusion coating comprising an epoxide resin, a siloxane resin, an acid anhydride and filters
US3245925A (en) * 1963-06-20 1966-04-12 Pittsburgh Plate Glass Co Coating composition containing polyepoxide, phenolic, acrylic and polyester resins
US3336251A (en) * 1964-05-14 1967-08-15 Shell Oil Co Rapid curing fluidized bed coating composition
US3756984A (en) * 1968-03-04 1973-09-04 Shell Oil Co Epoxy imidazole adducts as curing agents for epoxy resins
US3769069A (en) * 1971-03-16 1973-10-30 Goodyear Tire & Rubber Polyesterurethane coated metal
US3817946A (en) * 1973-02-02 1974-06-18 Minnesota Mining & Mfg Acrylic resins containing epoxy functionality
US3860557A (en) * 1971-01-18 1975-01-14 Beatrice Foods Co Electrostatic method of applying multilayer coating and product produced thereby
US3874883A (en) * 1972-07-07 1975-04-01 American Metal Climax Inc Corrosion inhibiting pigment and method of making same
US3884705A (en) * 1972-04-19 1975-05-20 Hooker Chemicals Plastics Corp Anti-corrosion weldable coating compositions
US3947522A (en) * 1973-03-12 1976-03-30 The Dow Chemical Company Epoxy resin compositions
US4186036A (en) * 1978-08-25 1980-01-29 The Dow Chemical Company Weldable coating compositions
US4237037A (en) * 1978-04-07 1980-12-02 Mitsui Petrochemical Industries Ltd. Powder coating composition composed of ethylene resin mixture and hydrocarbon wax
US4313837A (en) * 1980-05-02 1982-02-02 Amax, Inc. Using molybdates to inhibit corrosion in water-based metalworking fluids
US4316939A (en) * 1979-03-29 1982-02-23 Helic Van Cauwenberghe Process for the application of an anti-corrosive coating upon metallic objects, especially bottles for liquefied gas
US4345004A (en) * 1980-04-30 1982-08-17 Hercules Incorporated Process for forming a coated film of an olefinic resin
US4381334A (en) * 1976-11-10 1983-04-26 Pratt & Lambert, Inc. Zinc-rich powders
US4491554A (en) * 1983-09-27 1985-01-01 Thiokol Corporation One part activator and blowing agent for foaming plastics
US4572868A (en) * 1983-04-15 1986-02-25 Hitachi, Ltd. Anti-corrosive sealing tape
US4581293A (en) * 1985-02-05 1986-04-08 Westinghouse Electric Corp. Coating powder
US4804581A (en) * 1987-05-14 1989-02-14 Ppg Industries, Inc. Chip resistant coatings
US4933382A (en) * 1987-03-20 1990-06-12 Somar Corporation Epoxy resin powder coating composition
US5030285A (en) * 1988-03-03 1991-07-09 Colores Hispania S.A. Corrosion inhibiting pigment and a process for the manufacturing thereof
US5063095A (en) * 1989-09-06 1991-11-05 Somar Corporation Expandable powder coating composition, method of coating a substrate with heat-insulating foam and composite material obtained thereby
US5062284A (en) * 1989-11-10 1991-11-05 Somar Corporation Method of fabricating a bent metal body with hardenable resin coating
US5091242A (en) * 1990-10-30 1992-02-25 The Research Foundation Of State Univ. Of N.Y. Carbon fiber composites having improved fatigue resistance
US5097006A (en) * 1990-11-21 1992-03-17 U C B S.A. Weatherable powder coating compositions
US5137567A (en) * 1987-08-14 1992-08-11 Colores Hispania S.A. Corrosion inhibiting pigment
US5196261A (en) * 1991-07-31 1993-03-23 Somar Corporation Composite material having an expanded, cured epoxy resin layer, method of producing same and powder epoxy resin composition for forming such an expanded layer
US5248400A (en) * 1992-03-27 1993-09-28 Ppg Industries, Inc. Thermosetting powder coating compositions based on polyepoxides and elastomer-modified phenolics
US5264503A (en) * 1990-01-29 1993-11-23 Shell Oil Company Phenol-terminated epoxy resin with functional elastomer
US5274006A (en) * 1991-02-19 1993-12-28 Nippon Zeon Co., Ltd. Foamable epoxy resin composition
US5334631A (en) * 1991-07-22 1994-08-02 Akzo N.V. Powder coating composition containing a resin, a curing agent and zinc
US5338347A (en) * 1992-09-11 1994-08-16 The Lubrizol Corporation Corrosion inhibition composition
US5342885A (en) * 1989-12-08 1994-08-30 Shell Oil Company Epoxy resin coating with COOH-grated hydrogenated block copolymer
US5461112A (en) * 1994-10-11 1995-10-24 Shell Oil Company Epoxidized monohydroxylated block polymer, epoxy resin, curing agent and epoxy diluent
US5468461A (en) * 1992-06-03 1995-11-21 Nippon Paint Co., Ltd. Anticorrosive primer composition
US5562989A (en) * 1992-08-18 1996-10-08 E. I. Du Pont De Nemours And Company Method of protecting metal against corrosion with thermoplatic coatings
US5569687A (en) * 1995-03-16 1996-10-29 Rohm And Haas Company Waterborne zinc-rich primer compositions
US5614323A (en) * 1989-11-20 1997-03-25 Eastman Chemical Company Powder coating compositions
US5677367A (en) * 1995-08-15 1997-10-14 Savin; Ronald R. Graphite-containing compositions
US5686185A (en) * 1996-06-28 1997-11-11 Morton International, Inc. Disbondment resistant epoxy powder coating composition
US5789498A (en) * 1996-07-15 1998-08-04 Kansai Paint Co., Ltd. Curing catalyst for use in epoxy resin and heat curing coating composition containing the same
US5789482A (en) * 1990-03-30 1998-08-04 Ciba Specialty Chemicals Corporation Epoxy resin with anhydride, toughener and active hydrogen-containing compound
US5981086A (en) * 1996-10-08 1999-11-09 Morton International, Inc. Dual-layer coating on high-tensile steel
US6022927A (en) * 1995-02-28 2000-02-08 Morton International, Inc. Flexible, weatherable, acrylic coating powder
US6025438A (en) * 1994-03-16 2000-02-15 A. Raymond & Cie One-component thermosetting coating composition
US6069221A (en) * 1997-08-01 2000-05-30 Ppg Industries Ohio, Inc. Powder coating compositions containing a carboxylic acid functional polyester
US6184311B1 (en) * 1990-03-26 2001-02-06 Courtaulds Coatings (Holdings) Limited Powder coating composition of semi-crystalline polyester and curing agent
US20010002274A1 (en) * 1996-06-14 2001-05-31 Peter Lessmeister Metal strip coating process
US6254751B1 (en) * 1996-02-23 2001-07-03 Basf Coatings Ag Process for the multi-layered coating of substrates with electrophoretic coating material and powder coating material
US6284846B1 (en) * 1999-11-02 2001-09-04 Ppg Industries Ohio, Inc. Stable powder coating compositions
US6294610B1 (en) * 1999-11-29 2001-09-25 Rohm And Haas Company Coating powders for heat-sensitive substrates
US20010051227A1 (en) * 1996-05-17 2001-12-13 The Valspar Corporation Powder coating compositions and method
US6346292B1 (en) * 1998-10-15 2002-02-12 Rohm And Haas Company Corrosion- and chip-resistant coatings for high tensile steel
US6403222B1 (en) * 2000-09-22 2002-06-11 Henkel Corporation Wax-modified thermosettable compositions
US6521706B1 (en) * 1998-01-12 2003-02-18 Ppg Industries Ohio, Inc. Composition of epoxy polymer, thermoplastic polymer, rubber particles and curing agent
US6537610B1 (en) * 2001-09-17 2003-03-25 Springco Metal Coating, Inc. Method for providing a dual-layer coating on an automotive suspension product
US20030124248A1 (en) * 2001-10-11 2003-07-03 Tullos Tina L. Powder coating composition, method for the curing thereof, and articles derived therefrom
US6663968B2 (en) * 2000-11-01 2003-12-16 Rohm And Haas Company Corrosion-and chip-resistant coatings for high tensile steel
US20040009300A1 (en) * 2000-10-11 2004-01-15 Toshiaki Shimakura Method for pretreating and subsequently coating metallic surfaces with paint-type coating prior to forming and use og sybstrates coated in this way
US6770702B1 (en) * 1999-04-21 2004-08-03 Ppg Industries Lacke Gmbh Polymer
US20040266899A1 (en) * 2001-12-21 2004-12-30 Xaver Muenz Expandable epoxy resin-based systems modified with thermoplastic polymers
WO2006005136A1 (en) * 2004-07-14 2006-01-19 Orica Australia Pty. Ltd. Powder coating composition
WO2006052725A1 (en) * 2004-11-10 2006-05-18 Dow Global Technologies Inc. Amphiphilic block copolymer-toughened epoxy resins and ambient cure high-solids coatings made therefrom
US20070116963A1 (en) * 2003-12-09 2007-05-24 Chuo Hatsujo Kabushiki Kaisha Highly durable spring and method for coating same
US7244780B1 (en) * 1998-10-15 2007-07-17 International Coatings Limited Powder coating compositions
US20070172665A1 (en) * 2006-01-26 2007-07-26 Chuo Hatsujo Kabushiki Kaisha Spring with high durability and method of coating the same
US20090110934A1 (en) * 2007-10-31 2009-04-30 Cinoman Douglas S Thin chip resistant powder topcoats for steel
US20090176903A1 (en) * 2006-06-07 2009-07-09 Henkel Ag & Co. Kgaa Foamable compositions based on epoxy resins and polyesters
US20090270533A1 (en) * 2006-05-29 2009-10-29 Basf Coatings Japan Ltd. Heat-curable powder coating composition
US20100297422A1 (en) * 2008-01-25 2010-11-25 Akzo Nobel Coatings International B.V. Powder coating compositions having a substantially non-zinc containing primer
US20120258316A1 (en) * 2009-07-29 2012-10-11 Akzo Nobel Coatings International B.V. Powder coating compositions capable of having a substantially non-zinc containing primer

Family Cites Families (65)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3917648A (en) * 1971-01-18 1975-11-04 G D Mcleod & Sons Inc Galvanic coating compositions comprising polyol silcates and zinc dust
BE791204A (en) 1971-11-12 1973-05-10 Dow Chemical Co PROCESS FOR PREPARING SOLID EPOXY RESINS
JPS4939625A (en) 1972-08-21 1974-04-13
US4098740A (en) * 1975-11-20 1978-07-04 Ppg Industries, Inc. Aqueous acrylic-carboxylated polyether compositions
DE2557278C2 (en) 1975-12-19 1982-04-01 Hoechst Ag, 6000 Frankfurt Pipes and containers made of metal coated with hardened epoxy resin compounds and processes for their manufacture
ZA774151B (en) 1976-11-10 1978-12-27 Schenectady Chemical Zinc-rich powders
US4331520A (en) 1979-10-26 1982-05-25 Prototech Company Process for the recovery of hydrogen-reduced metals, ions and the like at porous hydrophobic catalytic barriers
DE3018765A1 (en) 1980-05-16 1981-11-26 Pulver-Lack Weigel KG, 7521 Forst Corrosion-protective powdered lacquer film deposition - from mixt. of zinc dust-contg. comminuted extrudate and added zinc dust
JPS58114766A (en) 1981-12-29 1983-07-08 Kansai Paint Co Ltd Forming method for double-layered coated film
JPS58114767A (en) 1981-12-29 1983-07-08 Kansai Paint Co Ltd Formation of double-layered paint coated film
JPS58168619A (en) 1982-03-30 1983-10-05 Nitto Electric Ind Co Ltd Epoxy resin composition
JPS5929154A (en) 1982-08-09 1984-02-16 新日本製鐵株式会社 Steel material coated with double layer epoxy and steel product
JPS59193970A (en) 1983-04-18 1984-11-02 Nippon Paint Co Ltd Powder coating composition
JPS61148274A (en) 1984-12-21 1986-07-05 Sumitomo Bakelite Co Ltd Epoxy resin powder coating composition
US4816090A (en) * 1986-09-10 1989-03-28 The Broken Hill Proprietary Co., Ltd. Heat treated cold rolled steel strapping
GB9006737D0 (en) 1990-03-26 1990-05-23 Courtaulds Coatings Ltd Coating compositions
JPH03170523A (en) 1990-11-02 1991-07-24 Mitsui Toatsu Chem Inc Thermosetting composition
BE1005552A6 (en) 1990-12-17 1993-10-26 Glorieux Hugo Albert Maurits Korrosiewerende protection composition.
NL9200479A (en) 1992-03-13 1993-10-01 Wilhelmus Eduard Anthonius Ten APPLICATION OF POWDER COATING.
JP3000785B2 (en) 1992-03-18 2000-01-17 不二製油株式会社 Method for producing a textured protein food
JPH069903A (en) * 1992-06-26 1994-01-18 Kansai Paint Co Ltd Zinc shop primer
JP3331524B2 (en) 1993-05-24 2002-10-07 東都化成株式会社 Epoxy resin composition for powder coating and production method thereof
JP3283345B2 (en) 1993-07-14 2002-05-20 住友ベークライト株式会社 Strong epoxy resin
US5324346A (en) * 1993-09-20 1994-06-28 Occidental Chemical Corporation Paint composition containing ferrophosphorus
JPH07216297A (en) 1994-01-31 1995-08-15 Somar Corp Powder coating composition with toughness
JP3368055B2 (en) * 1994-07-04 2003-01-20 関西ペイント株式会社 Thermosetting powder coating method
JP3502192B2 (en) 1995-06-27 2004-03-02 三井化学株式会社 Powder coating composition
CN1075525C (en) 1995-08-23 2001-11-28 关西油漆株式会社 One-pack epoxy resin composition, one-pack corrsoin-resistant paint composition, and coating method using said compositions
GB9603792D0 (en) 1996-02-22 1996-04-24 Shaw Ind Ltd Corrosion preventing coating
JPH09272820A (en) 1996-04-02 1997-10-21 Nippon Kayaku Co Ltd Epoxy resin-based powder coating
US6270855B1 (en) 1996-05-17 2001-08-07 The Valspar Corporation Powder coating compositions and methods
DE19735540C1 (en) * 1997-08-16 1999-04-01 Basf Coatings Ag Multilayered substrate and process for its manufacture
JP3865907B2 (en) * 1997-11-18 2007-01-10 日本化学工業株式会社 Antirust pigment composition and antirust paint containing the same
JPH11188309A (en) 1997-12-26 1999-07-13 Chuo Spring Co Ltd Method for preventing rust of spring plate
JP2000143938A (en) 1998-11-09 2000-05-26 Nippon Kayaku Co Ltd Epoxy resin composition and powder coating
JP2000176373A (en) 1998-12-11 2000-06-27 Saburo Umeda Tap water pipe with inner surface coated and method
JP3878348B2 (en) 1998-12-28 2007-02-07 新日本製鐵株式会社 Polyolefin coated steel
JP4020557B2 (en) 2000-01-26 2007-12-12 セントラル硝子株式会社 Electrolyte for electrochemical devices
DE10020481A1 (en) 2000-04-26 2001-10-31 Wobek Oberflaechenschutz Gmbh Coating of metal parts, especially of ungalvanized steel, comprises using powder coating compositions to avoid air pollution and health problems
JP2002105393A (en) * 2000-07-27 2002-04-10 Kawakami Paint Mfg Co Ltd Anticorrosive powder coating composition for steel material, steel material coated with the coating and method for producing the coated steel material
US6929705B2 (en) * 2001-04-30 2005-08-16 Ak Steel Corporation Antimicrobial coated metal sheet
JP4733874B2 (en) * 2001-08-07 2011-07-27 新日本製鐵株式会社 Polyolefin coated steel
JP2003286435A (en) 2002-03-28 2003-10-10 Kansai Paint Co Ltd Thermosetting epoxy resin powder coating
DE10219591A1 (en) 2002-05-02 2003-11-20 Basf Coatings Ag Coated springs for vehicles and process for their manufacture
US7166667B2 (en) * 2002-06-12 2007-01-23 Rohm And Haas Company Methods of preparing paints from prepaints
US7169862B2 (en) * 2002-10-04 2007-01-30 E. I. Du Pont De Nemours And Company Solvent-borne two component modified epoxy/polyamine coating composition
GB0226917D0 (en) 2002-11-19 2002-12-24 Walker Timothy Improved thermosetting process
US20070173553A1 (en) 2003-07-29 2007-07-26 Taylor Jr Edward W Waterborne coatings and foams and methods of forming them
JP2004352994A (en) * 2004-06-28 2004-12-16 Sumitomo Seika Chem Co Ltd Polyolefin-based powder coating composition
JP2006096928A (en) 2004-09-30 2006-04-13 Sumitomo Bakelite Co Ltd Epoxy resin powder coating and method for producing the same
JP2006096905A (en) 2004-09-30 2006-04-13 Sumitomo Bakelite Co Ltd Epoxy resin powder coating
CN101035874A (en) * 2004-10-06 2007-09-12 关西涂料株式会社 Thermosetting powder coating composition
JP4779379B2 (en) * 2005-02-25 2011-09-28 三菱化学株式会社 Epoxy resin composition for powder coating
US7348370B2 (en) * 2005-04-27 2008-03-25 United Technologies Corporation Metal oxides and hydroxides as corrosion inhibitor pigments for a chromate-free corrosion resistant epoxy primer
CN1687269A (en) * 2005-04-29 2005-10-26 大庆高新区纽曼化工科技有限公司 Enhanced anticorrosive and cutting resisting powder coating for reinforcing steel bar
EP1726621A1 (en) 2005-05-26 2006-11-29 Cytec Surface Specialties, S.A. Thermosetting powder compositions
DE102005036630B3 (en) * 2005-08-04 2006-09-14 Basf Coatings Ag Chrome-free and anti-corrosive pigment mixture, useful e.g. for producing hardening materials, comprises calcium hydrogen phosphate pigment, modified calcium silicon dioxide, calcium boron silicate pigment and zinc salt of nitro compound
ATE534703T1 (en) 2005-08-24 2011-12-15 Henkel Kgaa EPOXY COMPOSITIONS WITH IMPROVED IMPACT RESISTANCE
CN101033364A (en) * 2006-03-07 2007-09-12 徐州正菱涂装有限公司 Zinc-based double antiseptic powder coating and preparing method thereof
JP2007314762A (en) * 2006-04-24 2007-12-06 Nippon Steel Corp Powder coating composition, and heavy corrosion-resistant coated steel stock using the same
CN101067066A (en) * 2006-05-05 2007-11-07 罗门哈斯公司 Acid functional phosphorus-containing polyester powder compositions and powder coatings made therefrom
JP2007313475A (en) 2006-05-29 2007-12-06 Basf Coatings Japan Ltd Multilayer coating film formation process and article coated with the multilayer coating film
US20080233300A1 (en) * 2007-03-19 2008-09-25 Cinoman Douglas S Thermosetting powders comprising curing agent adducts of polyesters and strong, flexible powder coatings made therefrom
EP2268697B1 (en) 2008-04-14 2014-01-29 Dow Global Technologies LLC Epoxy-imidazole catalysts useful for powder coating applications
PT2565240E (en) 2009-04-03 2014-12-22 Akzo Nobel Coatings Int Bv Powder corrosion and chip-resistant coating

Patent Citations (77)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3170890A (en) * 1961-08-24 1965-02-23 Dow Corning Powders for fusion coating comprising an epoxide resin, a siloxane resin, an acid anhydride and filters
US3245925A (en) * 1963-06-20 1966-04-12 Pittsburgh Plate Glass Co Coating composition containing polyepoxide, phenolic, acrylic and polyester resins
US3336251A (en) * 1964-05-14 1967-08-15 Shell Oil Co Rapid curing fluidized bed coating composition
US3756984A (en) * 1968-03-04 1973-09-04 Shell Oil Co Epoxy imidazole adducts as curing agents for epoxy resins
US3860557A (en) * 1971-01-18 1975-01-14 Beatrice Foods Co Electrostatic method of applying multilayer coating and product produced thereby
US3769069A (en) * 1971-03-16 1973-10-30 Goodyear Tire & Rubber Polyesterurethane coated metal
US3884705A (en) * 1972-04-19 1975-05-20 Hooker Chemicals Plastics Corp Anti-corrosion weldable coating compositions
US3874883A (en) * 1972-07-07 1975-04-01 American Metal Climax Inc Corrosion inhibiting pigment and method of making same
US3817946A (en) * 1973-02-02 1974-06-18 Minnesota Mining & Mfg Acrylic resins containing epoxy functionality
US3947522A (en) * 1973-03-12 1976-03-30 The Dow Chemical Company Epoxy resin compositions
US4381334A (en) * 1976-11-10 1983-04-26 Pratt & Lambert, Inc. Zinc-rich powders
US4237037A (en) * 1978-04-07 1980-12-02 Mitsui Petrochemical Industries Ltd. Powder coating composition composed of ethylene resin mixture and hydrocarbon wax
US4186036A (en) * 1978-08-25 1980-01-29 The Dow Chemical Company Weldable coating compositions
US4316939A (en) * 1979-03-29 1982-02-23 Helic Van Cauwenberghe Process for the application of an anti-corrosive coating upon metallic objects, especially bottles for liquefied gas
US4345004A (en) * 1980-04-30 1982-08-17 Hercules Incorporated Process for forming a coated film of an olefinic resin
US4313837A (en) * 1980-05-02 1982-02-02 Amax, Inc. Using molybdates to inhibit corrosion in water-based metalworking fluids
US4572868A (en) * 1983-04-15 1986-02-25 Hitachi, Ltd. Anti-corrosive sealing tape
US4491554A (en) * 1983-09-27 1985-01-01 Thiokol Corporation One part activator and blowing agent for foaming plastics
US4581293A (en) * 1985-02-05 1986-04-08 Westinghouse Electric Corp. Coating powder
US4933382A (en) * 1987-03-20 1990-06-12 Somar Corporation Epoxy resin powder coating composition
US4804581A (en) * 1987-05-14 1989-02-14 Ppg Industries, Inc. Chip resistant coatings
US5137567A (en) * 1987-08-14 1992-08-11 Colores Hispania S.A. Corrosion inhibiting pigment
US5030285A (en) * 1988-03-03 1991-07-09 Colores Hispania S.A. Corrosion inhibiting pigment and a process for the manufacturing thereof
US5063095A (en) * 1989-09-06 1991-11-05 Somar Corporation Expandable powder coating composition, method of coating a substrate with heat-insulating foam and composite material obtained thereby
US5062284A (en) * 1989-11-10 1991-11-05 Somar Corporation Method of fabricating a bent metal body with hardenable resin coating
US5614323A (en) * 1989-11-20 1997-03-25 Eastman Chemical Company Powder coating compositions
US5342885A (en) * 1989-12-08 1994-08-30 Shell Oil Company Epoxy resin coating with COOH-grated hydrogenated block copolymer
US5264503A (en) * 1990-01-29 1993-11-23 Shell Oil Company Phenol-terminated epoxy resin with functional elastomer
US6184311B1 (en) * 1990-03-26 2001-02-06 Courtaulds Coatings (Holdings) Limited Powder coating composition of semi-crystalline polyester and curing agent
US5789482A (en) * 1990-03-30 1998-08-04 Ciba Specialty Chemicals Corporation Epoxy resin with anhydride, toughener and active hydrogen-containing compound
US5091242A (en) * 1990-10-30 1992-02-25 The Research Foundation Of State Univ. Of N.Y. Carbon fiber composites having improved fatigue resistance
US5097006A (en) * 1990-11-21 1992-03-17 U C B S.A. Weatherable powder coating compositions
US5274006A (en) * 1991-02-19 1993-12-28 Nippon Zeon Co., Ltd. Foamable epoxy resin composition
US5334631A (en) * 1991-07-22 1994-08-02 Akzo N.V. Powder coating composition containing a resin, a curing agent and zinc
US5196261A (en) * 1991-07-31 1993-03-23 Somar Corporation Composite material having an expanded, cured epoxy resin layer, method of producing same and powder epoxy resin composition for forming such an expanded layer
US5248400A (en) * 1992-03-27 1993-09-28 Ppg Industries, Inc. Thermosetting powder coating compositions based on polyepoxides and elastomer-modified phenolics
US5468461A (en) * 1992-06-03 1995-11-21 Nippon Paint Co., Ltd. Anticorrosive primer composition
US5562989A (en) * 1992-08-18 1996-10-08 E. I. Du Pont De Nemours And Company Method of protecting metal against corrosion with thermoplatic coatings
US5338347A (en) * 1992-09-11 1994-08-16 The Lubrizol Corporation Corrosion inhibition composition
US6025438A (en) * 1994-03-16 2000-02-15 A. Raymond & Cie One-component thermosetting coating composition
US5461112A (en) * 1994-10-11 1995-10-24 Shell Oil Company Epoxidized monohydroxylated block polymer, epoxy resin, curing agent and epoxy diluent
US6022927A (en) * 1995-02-28 2000-02-08 Morton International, Inc. Flexible, weatherable, acrylic coating powder
US5569687A (en) * 1995-03-16 1996-10-29 Rohm And Haas Company Waterborne zinc-rich primer compositions
US5677367A (en) * 1995-08-15 1997-10-14 Savin; Ronald R. Graphite-containing compositions
US6254751B1 (en) * 1996-02-23 2001-07-03 Basf Coatings Ag Process for the multi-layered coating of substrates with electrophoretic coating material and powder coating material
US20010051227A1 (en) * 1996-05-17 2001-12-13 The Valspar Corporation Powder coating compositions and method
US20010002274A1 (en) * 1996-06-14 2001-05-31 Peter Lessmeister Metal strip coating process
US5686185A (en) * 1996-06-28 1997-11-11 Morton International, Inc. Disbondment resistant epoxy powder coating composition
US5789498A (en) * 1996-07-15 1998-08-04 Kansai Paint Co., Ltd. Curing catalyst for use in epoxy resin and heat curing coating composition containing the same
US5981086A (en) * 1996-10-08 1999-11-09 Morton International, Inc. Dual-layer coating on high-tensile steel
US6069221A (en) * 1997-08-01 2000-05-30 Ppg Industries Ohio, Inc. Powder coating compositions containing a carboxylic acid functional polyester
US6521706B1 (en) * 1998-01-12 2003-02-18 Ppg Industries Ohio, Inc. Composition of epoxy polymer, thermoplastic polymer, rubber particles and curing agent
US6677032B1 (en) * 1998-10-15 2004-01-13 Rohm And Haas Company Corrosion-and chip-resistant coatings for high tensile steel
US6346292B1 (en) * 1998-10-15 2002-02-12 Rohm And Haas Company Corrosion- and chip-resistant coatings for high tensile steel
US7244780B1 (en) * 1998-10-15 2007-07-17 International Coatings Limited Powder coating compositions
US7018716B2 (en) * 1998-10-15 2006-03-28 Rohm And Haas Company Corrosion-and chip-resistant coatings for high tensile steel
US20040101670A1 (en) * 1998-10-15 2004-05-27 Grubb Tina L. Corrosion-and chip-resistant coatings for high tensile steel
US6770702B1 (en) * 1999-04-21 2004-08-03 Ppg Industries Lacke Gmbh Polymer
US6284846B1 (en) * 1999-11-02 2001-09-04 Ppg Industries Ohio, Inc. Stable powder coating compositions
US6294610B1 (en) * 1999-11-29 2001-09-25 Rohm And Haas Company Coating powders for heat-sensitive substrates
US6403222B1 (en) * 2000-09-22 2002-06-11 Henkel Corporation Wax-modified thermosettable compositions
US20040009300A1 (en) * 2000-10-11 2004-01-15 Toshiaki Shimakura Method for pretreating and subsequently coating metallic surfaces with paint-type coating prior to forming and use og sybstrates coated in this way
US6663968B2 (en) * 2000-11-01 2003-12-16 Rohm And Haas Company Corrosion-and chip-resistant coatings for high tensile steel
US6537610B1 (en) * 2001-09-17 2003-03-25 Springco Metal Coating, Inc. Method for providing a dual-layer coating on an automotive suspension product
US20030124248A1 (en) * 2001-10-11 2003-07-03 Tullos Tina L. Powder coating composition, method for the curing thereof, and articles derived therefrom
US20040266899A1 (en) * 2001-12-21 2004-12-30 Xaver Muenz Expandable epoxy resin-based systems modified with thermoplastic polymers
US7473717B2 (en) * 2001-12-21 2009-01-06 Henkel Ag & Co. Kgaa Expandable epoxy resin-based systems modified with thermoplastic polymers
US20070116963A1 (en) * 2003-12-09 2007-05-24 Chuo Hatsujo Kabushiki Kaisha Highly durable spring and method for coating same
WO2006005136A1 (en) * 2004-07-14 2006-01-19 Orica Australia Pty. Ltd. Powder coating composition
WO2006052725A1 (en) * 2004-11-10 2006-05-18 Dow Global Technologies Inc. Amphiphilic block copolymer-toughened epoxy resins and ambient cure high-solids coatings made therefrom
US20070172665A1 (en) * 2006-01-26 2007-07-26 Chuo Hatsujo Kabushiki Kaisha Spring with high durability and method of coating the same
US8192840B2 (en) * 2006-01-26 2012-06-05 Chuo Hatsujo Kabushiki Kaisha Spring with high durability and method of coating the same
US20090270533A1 (en) * 2006-05-29 2009-10-29 Basf Coatings Japan Ltd. Heat-curable powder coating composition
US20090176903A1 (en) * 2006-06-07 2009-07-09 Henkel Ag & Co. Kgaa Foamable compositions based on epoxy resins and polyesters
US20090110934A1 (en) * 2007-10-31 2009-04-30 Cinoman Douglas S Thin chip resistant powder topcoats for steel
US20100297422A1 (en) * 2008-01-25 2010-11-25 Akzo Nobel Coatings International B.V. Powder coating compositions having a substantially non-zinc containing primer
US20120258316A1 (en) * 2009-07-29 2012-10-11 Akzo Nobel Coatings International B.V. Powder coating compositions capable of having a substantially non-zinc containing primer

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090110934A1 (en) * 2007-10-31 2009-04-30 Cinoman Douglas S Thin chip resistant powder topcoats for steel
US8574708B2 (en) 2007-10-31 2013-11-05 Akzo Nobel Coatings International B.V. Thin chip resistant powder topcoats for steel
US20100297422A1 (en) * 2008-01-25 2010-11-25 Akzo Nobel Coatings International B.V. Powder coating compositions having a substantially non-zinc containing primer
US8647745B2 (en) 2008-01-25 2014-02-11 Akzo Nobel Coating International B.V. Powder coating compositions having a substantially non-zinc containing primer
US10344178B2 (en) 2009-04-03 2019-07-09 Akzo Nobel Coatings International B.V. Powder corrosion and chip-resistant coating
US10011736B2 (en) 2009-07-29 2018-07-03 Akzo Nobel Coatings International B.V. Powder coating compositions capable of having a substantially non-zinc containing primer
US10550283B2 (en) 2009-07-29 2020-02-04 Akzo Nobel Coating International B.V. Powder coating compositions capable of having a substantially non-zinc containing primer
JP7377357B2 (en) 2019-12-05 2023-11-09 アクゾ ノーベル コーティングス インターナショナル ビー ヴィ low solvent coating composition

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