WO2004000916A2 - Stable dispersions of nanoparticles in aqueous media - Google Patents
Stable dispersions of nanoparticles in aqueous media Download PDFInfo
- Publication number
- WO2004000916A2 WO2004000916A2 PCT/US2003/003188 US0303188W WO2004000916A2 WO 2004000916 A2 WO2004000916 A2 WO 2004000916A2 US 0303188 W US0303188 W US 0303188W WO 2004000916 A2 WO2004000916 A2 WO 2004000916A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- nanoparticles
- selecting
- dispersant
- composition
- metal oxides
- Prior art date
Links
- 239000006185 dispersion Substances 0.000 title claims abstract description 91
- 239000002105 nanoparticle Substances 0.000 title claims abstract description 50
- 239000012736 aqueous medium Substances 0.000 title claims abstract description 13
- 239000002270 dispersing agent Substances 0.000 claims abstract description 48
- 239000000203 mixture Substances 0.000 claims abstract description 28
- 238000000034 method Methods 0.000 claims abstract description 23
- 229920001577 copolymer Polymers 0.000 claims abstract description 15
- -1 cyclic phosphates Chemical class 0.000 claims abstract description 8
- 229910019142 PO4 Inorganic materials 0.000 claims abstract description 6
- 235000021317 phosphate Nutrition 0.000 claims abstract description 6
- 229910044991 metal oxide Inorganic materials 0.000 claims description 17
- 150000004706 metal oxides Chemical class 0.000 claims description 17
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 11
- 229910000420 cerium oxide Inorganic materials 0.000 claims description 7
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 claims description 7
- 230000007935 neutral effect Effects 0.000 claims description 6
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 6
- 239000011787 zinc oxide Substances 0.000 claims description 6
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 claims description 4
- SKRWFPLZQAAQSU-UHFFFAOYSA-N stibanylidynetin;hydrate Chemical compound O.[Sn].[Sb] SKRWFPLZQAAQSU-UHFFFAOYSA-N 0.000 claims description 4
- 230000002378 acidificating effect Effects 0.000 claims description 3
- 238000004873 anchoring Methods 0.000 claims description 3
- 125000000129 anionic group Chemical group 0.000 claims description 3
- 125000002091 cationic group Chemical group 0.000 claims description 3
- 230000003993 interaction Effects 0.000 claims 10
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims 4
- 229910003455 mixed metal oxide Inorganic materials 0.000 claims 4
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 claims 2
- 229910000423 chromium oxide Inorganic materials 0.000 claims 2
- 125000004122 cyclic group Chemical group 0.000 claims 2
- 125000000524 functional group Chemical group 0.000 claims 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims 2
- 239000010452 phosphate Substances 0.000 claims 2
- 239000002245 particle Substances 0.000 description 21
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 description 11
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 description 11
- 230000007774 longterm Effects 0.000 description 11
- 229910052751 metal Inorganic materials 0.000 description 11
- 239000002184 metal Substances 0.000 description 11
- 229920000642 polymer Polymers 0.000 description 9
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 6
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 6
- 229920001519 homopolymer Polymers 0.000 description 6
- 150000002739 metals Chemical class 0.000 description 6
- 239000012530 fluid Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 4
- 239000004743 Polypropylene Substances 0.000 description 3
- 230000002776 aggregation Effects 0.000 description 3
- 238000004220 aggregation Methods 0.000 description 3
- 238000005189 flocculation Methods 0.000 description 3
- 230000016615 flocculation Effects 0.000 description 3
- 238000012388 gravitational sedimentation Methods 0.000 description 3
- 229920001155 polypropylene Polymers 0.000 description 3
- 239000013049 sediment Substances 0.000 description 3
- 239000005751 Copper oxide Substances 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 229910000431 copper oxide Inorganic materials 0.000 description 2
- 239000007822 coupling agent Substances 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000002707 nanocrystalline material Substances 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- 238000002525 ultrasonication Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000002296 dynamic light scattering Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002609 medium Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000000080 wetting agent Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J13/00—Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided for; Making microcapsules or microballoons
- B01J13/0004—Preparation of sols
- B01J13/0034—Additives, e.g. in view of promoting stabilisation or peptisation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J13/00—Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided for; Making microcapsules or microballoons
- B01J13/0004—Preparation of sols
- B01J13/0047—Preparation of sols containing a metal oxide
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
- C01B13/14—Methods for preparing oxides or hydroxides in general
- C01B13/145—After-treatment of oxides or hydroxides, e.g. pulverising, drying, decreasing the acidity
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F17/00—Compounds of rare earth metals
- C01F17/20—Compounds containing only rare earth metals as the metal element
- C01F17/206—Compounds containing only rare earth metals as the metal element oxide or hydroxide being the only anion
- C01F17/224—Oxides or hydroxides of lanthanides
- C01F17/235—Cerium oxides or hydroxides
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
- C01F7/021—After-treatment of oxides or hydroxides
- C01F7/026—Making or stabilising dispersions
-
- 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
- C09D17/00—Pigment pastes, e.g. for mixing in paints
- C09D17/004—Pigment pastes, e.g. for mixing in paints containing an inorganic pigment
- C09D17/007—Metal oxide
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09G—POLISHING COMPOSITIONS; SKI WAXES
- C09G1/00—Polishing compositions
- C09G1/02—Polishing compositions containing abrasives or grinding agents
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K23/00—Use of substances as emulsifying, wetting, dispersing, or foam-producing agents
- C09K23/14—Derivatives of phosphoric acid
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K23/00—Use of substances as emulsifying, wetting, dispersing, or foam-producing agents
- C09K23/16—Amines or polyamines
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/30—Particle morphology extending in three dimensions
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/62—Submicrometer sized, i.e. from 0.1-1 micrometer
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/64—Nanometer sized, i.e. from 1-100 nanometer
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/22—Rheological behaviour as dispersion, e.g. viscosity, sedimentation stability
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K23/00—Use of substances as emulsifying, wetting, dispersing, or foam-producing agents
Definitions
- the present invention relates to dispersions of nanoparticles in aqueous media, and more specifically to stable aqueous dispersions of nanocrystalline metals and metal oxides.
- aqueous-based dispersions of nanoparticles such as substantially spherical nanocrystalline metals and/or metal oxides would be useful for many applications.
- Such dispersions could serve as a component of transparent coatings, which could be used on surfaces to yield unique properties such as abrasion resistance, radiation absorption or reflection, electrical conductivity, and catalytic function.
- Other applications of dispersions include, but are not limited to, functioning as abrasive or polishing fluids, thermal transfer fluids, catalytic additives, ingredients to cosmetic and personal care formulations, and electro-rheological fluids.
- the present invention relates to a method of preparing or forming stable dispersions of nanoparticles and aqueous media.
- the method comprises combining a dispersant with aqueous media to form a mixture.
- the dispersant in one example is selected from the group comprising water soluble copolymers and cyclic phosphates.
- Nanoparticles, such as substantially spherical nanocrystalline metal and/or metal oxide particles are added to the mixture.
- Isoelectric point - the pH of zero net charge on a nanoparticle in dispersion.
- the isoelectric point is determined by measuring the zeta-potential of a nanoparticle dispersion and a buffer to maintain dispersion pH. The pH where the zeta-potential is zero is the isoelectric point.
- Short-term stable dispersion - the dispersed nanoparticles do not aggregate (no increase in particle size) and gravitational sedimentation is minimized on the time frame of 6 months and longer.
- Short-term stable dispersion - the dispersed nanoparticles are initially well dispersed but begin to aggregate, displaying an increased particle size and concomitant sedimentation, on the time frame of days to weeks.
- Water-soluble dispersants are used in a method of dispersing nanoparticles, such as substantially spherical metal and/or metal oxide nanoparticles.
- the nanoparticles comprise the nanocrystalline materials described in U.S. Patent Number 5,874,684, entitled “Nanocrystalline Materials", which was granted to Parker et al. on February 23, 1999, and which is hereby incorporated by reference.
- aqueous-based dispersions are made by dissolving dispersant in water and adding the nanoparticles while high shear mixing (e.g., ultrasonication, rotor-stator mixing, homogenizer mixing, etc.)
- high shear mixing e.g., ultrasonication, rotor-stator mixing, homogenizer mixing, etc.
- Substantially spherical nanocrystalline metals and/or metal oxides are dispersed above their isoelectric points using a variety of water soluble dispersants, including but not limited to, pigment dispersants, surfactants, wetting agents, coupling agents (hereinafter referred to collectively in this document as "dispersants").
- the dispersants range from small molecules to oligomeric materials to polymers to coupling agents and featured a variety of different surface anchoring groups (acidic, basic, or neutral), and had different ionic character (cationic, anionic, or neutral).
- Dispersion stability with respect to gravimetric sedimentation over time Surfactants, such as those given in the examples which follow, were employed to obtain stable dispersions of substantially spherical nanocrystalline metal and metal oxide particles.
- the pH was adjusted above the isoelectric point of the particles with hydroxide bases.
- aqueous-based dispersions of substantially spherical nanocrystalline particles are stable, have a pH greater that the isoelectric point of the particles in an aqueous-based medium, and could be incorporated into application formulations without inducing flocculation of the particles.
- Example 1 Aqueous-Based Dispersions of Substantially Spherical
- Nanocrystalline Aluminum Oxide Dispersants evaluated in aqueous-based dispersions of aluminum oxide are listed in Table 1.
- the dispersions that were initially stable were monitored over time and were further characterized.
- the general dispersion effectiveness falls into two groups depending on the length of time the dispersion remains stable. Long-term stable dispersions are stable for at least 6 months and do not exhibit aggregation and particle size growth. However, short-term stable dispersions exhibit aggregation and particle size growth on the time frame of days to weeks.
- Example 2 Aqueous-Based Dispersions of Substantially Spherical
- Dispersants evaluated in aqueous-based dispersions of cerium oxide are listed in Table 2.
- the dispersions that were initially stable were evaluated over time and were further characterized. As with alumina, the general dispersion effectiveness for ceria falls into two groups depending on the length of time the dispersion remains stable - long-term and short-term stable dispersions.
- Example 3 Aqueous-Based Dispersions of Substantially Spherical Nanocrystalline Zinc Oxide
- Dispersants evaluated in aqueous-based dispersions of zinc oxide are listed in Table 3.
- the dispersions that were initially stable were evaluated over time and were further characterized. As with alumina and ceria, the general dispersion effectiveness for ceria falls into two groups depending on the length of time the dispersion remains stable - long-term and short-term stable dispersions.
- Example 4 Aqueous-Based Dispersions of Other Substantially Spherical Nanocrystalline Particles - Copper Oxide, Silver, Antimony Tin Oxide, Indium Tin Oxide
- aqueous-based dispersions of other substantially spherical nanocrystalline particles - copper oxide, silver, antimony tin oxide, indium tin oxide - are produced using water-soluble copolymer dispersant levels from 1 to 20-wt% dispersant with respect to nanocrystalline particles, depending on the copolymer dispersant used.
- the copolymer dispersant stabilizes the volume-weighted mean particle size preventing aggregation (the formation of grape-like clusters).
- Example 5 The Stability of Aqueous-Based Dispersions of Substantially
- the mean particle size, of substantially spherical ceria, in aqueous dispersion at pH 7.5 on a volume-weight basis (measured using dynamic light scattering), as functions of time and dispersant type, are given in Table 4.
- the mean particle size is stable for Zephrym PD 3315 and Polyacryl C50-45 AN, water-soluble copolymers that have polymer segments that are attractive to the nanocrystalline particle and polymer segments that render them water-soluble.
- homopolymers of acrylic acid is a surprising result. - homopolymers of acrylic acid as a class are claimed to render the dispersions stable (see US Patent 5,876,490)
- aqueous dispersions of substantially spherical nanocrystalline ceria at elevated pH with respect to gravitational sedimentation was quantified as a function of dispersant type, dispersant concentration, and pH.
- a slow rate of gravitational sedimentation is desired in storage containers to minimize the amount of mixing required to homogenize the concentration.
- the problem is particularly challenging since the density of the ceria is approximately seven times the density of water and for 20-wt% ceria dispersions the dispersion viscosity is less than 10 cP.
- Dispersions were prepared using C50-45AN and B55-50AN. Each sample in Table 5 was placed into a 500 mL polypropylene graduated cylinder. The cylinder contained a column of ceria dispersion 27.5 cm high. The graduated cylinder was covered tightly with Parafilm and set aside for 30 days.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004515609A JP2005519761A (en) | 2002-02-04 | 2003-02-04 | Stable nanoparticle dispersions in aqueous media |
CA002469335A CA2469335A1 (en) | 2002-02-04 | 2003-02-04 | Stable dispersions of nanoparticles in aqueous media |
EP03754358A EP1481020A2 (en) | 2002-02-04 | 2003-02-04 | Stable dispersions of nanoparticles in aqueous media |
AU2003272186A AU2003272186A1 (en) | 2002-02-04 | 2003-02-04 | Stable dispersions of nanoparticles in aqueous media |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US35418402P | 2002-02-04 | 2002-02-04 | |
US60/354,184 | 2002-02-04 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2004000916A2 true WO2004000916A2 (en) | 2003-12-31 |
WO2004000916A3 WO2004000916A3 (en) | 2004-07-22 |
Family
ID=30000380
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2003/003188 WO2004000916A2 (en) | 2002-02-04 | 2003-02-04 | Stable dispersions of nanoparticles in aqueous media |
Country Status (6)
Country | Link |
---|---|
US (1) | US20040258608A1 (en) |
EP (1) | EP1481020A2 (en) |
JP (1) | JP2005519761A (en) |
AU (1) | AU2003272186A1 (en) |
CA (1) | CA2469335A1 (en) |
WO (1) | WO2004000916A2 (en) |
Cited By (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005000914A1 (en) * | 2003-06-24 | 2005-01-06 | Ppg Industries Ohio, Inc. | Aqueous dispersions of microparticles having a nanoparticulate phase and coating compositions containing the same |
WO2005046328A1 (en) * | 2003-10-30 | 2005-05-26 | Basf Aktiengesellschaft | Nanoparticulate active substance formulations |
WO2006019008A1 (en) * | 2004-08-20 | 2006-02-23 | Kaneka Corporation | Polymer-modified nanoparticle |
JP2006056999A (en) * | 2004-08-20 | 2006-03-02 | Kaneka Corp | Polymer-modified nanoparticle |
WO2006028200A1 (en) * | 2004-09-09 | 2006-03-16 | Mitsubishi Rayon Co., Ltd. | Nanosubstance-containing composition, process for producing the same, and composite made with the same |
WO2006067453A1 (en) * | 2004-12-23 | 2006-06-29 | Eastman Kodak Company | Dispersant for reducing viscosity |
JP2006328311A (en) * | 2005-05-30 | 2006-12-07 | Mitsubishi Rayon Co Ltd | Hardenable resin composition, laminated article and their manufacturing method |
WO2006131497A1 (en) * | 2005-06-04 | 2006-12-14 | Solvay Infra Bad Hoenningen Gmbh | Modified nanoparticles |
US7332532B2 (en) | 2004-04-13 | 2008-02-19 | Hewlett-Packard Development, L.P. | Polymeric dispersants for ink-jet applications |
WO2008024702A2 (en) * | 2006-08-21 | 2008-02-28 | Air Products And Chemicals, Inc. | Zinc oxide nanoparticle dispersions |
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US7612124B2 (en) | 2003-06-24 | 2009-11-03 | Ppg Industries Ohio, Inc. | Ink compositions and related methods |
US7635727B2 (en) | 2003-06-24 | 2009-12-22 | Ppg Industries Ohio, Inc. | Composite transparencies |
US7671109B2 (en) | 2003-06-24 | 2010-03-02 | Ppg Industries Ohio, Inc. | Tinted, abrasion resistant coating compositions and coated articles |
US7745514B2 (en) | 2003-06-24 | 2010-06-29 | Ppg Industries Ohio, Inc. | Tinted, abrasion resistant coating compositions and coated articles |
US7910634B2 (en) | 2004-03-25 | 2011-03-22 | Ppg Industries Ohio, Inc. | Aqueous dispersions of polymer-enclosed particles, related coating compositions and coated substrates |
US8178160B2 (en) | 2006-01-20 | 2012-05-15 | Ppg Industries Ohio, Inc. | Decorative and durable coating having a homogeneous hue, methods for their preparation, and articles coated therewith |
US8507050B2 (en) | 2008-11-12 | 2013-08-13 | Ppg Industries Ohio, Inc. | Methods for depositing ultra thin coatings exhibiting low haze and methods for the preparation of such coatings |
US8512467B2 (en) | 2006-08-21 | 2013-08-20 | Air Products And Chemicals, Inc. | Zinc oxide nanoparticle dispersions |
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US8586244B2 (en) * | 2007-04-02 | 2013-11-19 | Eveready Battery Co., Inc. | Alkaline electrochemical cell having a negative electrode with solid zinc oxide and a surfactant |
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Also Published As
Publication number | Publication date |
---|---|
WO2004000916A3 (en) | 2004-07-22 |
EP1481020A2 (en) | 2004-12-01 |
JP2005519761A (en) | 2005-07-07 |
AU2003272186A1 (en) | 2004-01-06 |
US20040258608A1 (en) | 2004-12-23 |
CA2469335A1 (en) | 2003-12-31 |
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