WO2006113000B1 - Cap liners, closures and gaskets from multi-block polymers - Google Patents

Cap liners, closures and gaskets from multi-block polymers

Info

Publication number
WO2006113000B1
WO2006113000B1 PCT/US2006/009501 US2006009501W WO2006113000B1 WO 2006113000 B1 WO2006113000 B1 WO 2006113000B1 US 2006009501 W US2006009501 W US 2006009501W WO 2006113000 B1 WO2006113000 B1 WO 2006113000B1
Authority
WO
WIPO (PCT)
Prior art keywords
ethylene
percent
interpolymer
gasket
polymer
Prior art date
Application number
PCT/US2006/009501
Other languages
French (fr)
Other versions
WO2006113000A2 (en
WO2006113000A3 (en
Inventor
Ronald Paul Markovich
Dale M Elley-Bristow
Miguel Alberto Prieto
Russell Paul Barry
Felipe Martinez
Daniel J Falla
Julien H J M Damen
Original Assignee
Dow Global Technologies Inc
Ronald Paul Markovich
Dale M Elley-Bristow
Miguel Alberto Prieto
Russell Paul Barry
Felipe Martinez
Daniel J Falla
Julien H J M Damen
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from PCT/US2005/008917 external-priority patent/WO2005090427A2/en
Priority to CN2006800083690A priority Critical patent/CN101426880B/en
Priority to JP2008502036A priority patent/JP5227786B2/en
Priority to BRPI0609824-0A priority patent/BRPI0609824B1/en
Priority to CA002601263A priority patent/CA2601263A1/en
Priority to MX2007011334A priority patent/MX2007011334A/en
Application filed by Dow Global Technologies Inc, Ronald Paul Markovich, Dale M Elley-Bristow, Miguel Alberto Prieto, Russell Paul Barry, Felipe Martinez, Daniel J Falla, Julien H J M Damen filed Critical Dow Global Technologies Inc
Priority to US11/908,951 priority patent/US7592397B2/en
Priority to EP06769781.3A priority patent/EP1877513B1/en
Priority to AU2006237514A priority patent/AU2006237514B2/en
Publication of WO2006113000A2 publication Critical patent/WO2006113000A2/en
Publication of WO2006113000A3 publication Critical patent/WO2006113000A3/en
Publication of WO2006113000B1 publication Critical patent/WO2006113000B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D53/00—Sealing or packing elements; Sealings formed by liquid or plastics material
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F10/00—Homopolymers and copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
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    • C08F10/00—Homopolymers and copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
    • C08F10/14—Monomers containing five or more carbon atoms
    • C—CHEMISTRY; METALLURGY
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    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F210/00—Copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
    • C08F210/16—Copolymers of ethene with alpha-alkenes, e.g. EP rubbers
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    • C08F295/00—Macromolecular compounds obtained by polymerisation using successively different catalyst types without deactivating the intermediate polymer
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    • C08F297/00—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer
    • C08F297/02—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer using a catalyst of the anionic type
    • C08F297/04—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer using a catalyst of the anionic type polymerising vinyl aromatic monomers and conjugated dienes
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    • C08F297/00—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer
    • C08F297/06—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer using a catalyst of the coordination type
    • C08F297/08—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer using a catalyst of the coordination type polymerising mono-olefins
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    • C08F297/00—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer
    • C08F297/06—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer using a catalyst of the coordination type
    • C08F297/08—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer using a catalyst of the coordination type polymerising mono-olefins
    • C08F297/083—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer using a catalyst of the coordination type polymerising mono-olefins the monomers being ethylene or propylene
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    • C08F297/06—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer using a catalyst of the coordination type
    • C08F297/08—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer using a catalyst of the coordination type polymerising mono-olefins
    • C08F297/083—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer using a catalyst of the coordination type polymerising mono-olefins the monomers being ethylene or propylene
    • C08F297/086—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer using a catalyst of the coordination type polymerising mono-olefins the monomers being ethylene or propylene the block polymer contains at least three blocks
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    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
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    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/08—Copolymers of ethene
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    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
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    • C08L53/00—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
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    • C09K3/10—Materials in mouldable or extrudable form for sealing or packing joints or covers
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    • C08F2410/00—Features related to the catalyst preparation, the catalyst use or to the deactivation of the catalyst
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    • C08F4/60—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides together with refractory metals, iron group metals, platinum group metals, manganese, rhenium technetium or compounds thereof
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    • C08F4/44—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides
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Abstract

A polymer composition comprises at least an ethylene/α-oleiln interpolymer and at least one other polymer. The other polymer can be selected from a second ethylene/α-olefm interpolymer, an elastomer, a polyolefin, a polar polymer, and an ethylene/carboxylic acid interpolymer or ionomer thereof. The ethylene/α-olefm interpolymer is a block copolymer having at least a hard block and at least a soft block. The soft block comprises a higher amount of comonomers than the hard block. The block interpolymer has a number of unique characteristics disclosed here. Also provided are gaskets, bottle cap liners, and closures that comprise or obtained from a compositon comprising at least one ethylene/α-olefm interpolymer and at least one polyolefin. The gaskets are capable of compression sealing various containers, without contaminating the contents. Liquid containers particularly benefit from the use of the novel gasket materials disclosed herein.

Claims

AMENDED CLAIMS received by the International Bureau on 30 August 2007 (30.08.2007)What is claimed is:
1. A gasket comprising or obtainable from a composition comprising: (A) about 80 to about 97.5 weight percent, based on the total weight of components (A), (B) and (C), of at least one ethylene/α-olefin interpolymer; wherein the ethylene/α-olefϊn interpolymer is a block interpolymer and:
(a) has a Mw/Mn from about 1.7 to about 3.5, at least one melting point, Tm, in degrees Celsius, and a density, d, in grams/cubic centimeter, wherein the numerical values of Tm and d correspond to the relationship:
Tm > -2002.9 + 4538.5(d) - 2422.2(d)2, or (b) has a Mw/Mn from about 1.7 to about 3.5, and is characterized by a heat of fusion, ΔH in J/g, and a delta quantity, ΔT, in degrees Celsius, defined as the temperature difference between the tallest DSC peak and the tallest CRYSTAF peak, wherein the numerical values of ΔT and ΔH have the following relationships:
ΔT > -0.1299(ΔH) + 62.81 for ΔH greater than zero and up to 130 J/g, ΔT > 480C for ΔH greater than 130 J/g , wherein the CRYSTAF peak is determined using at least 5 percent of the cumulative polymer, and if less than 5 percent of the polymer has an identifiable CRYSTAF peak, then the CRYSTAF temperature is 3O0C; or
(c) is characterized by an elastic recovery, Re, in percent at 300 percent strain and 1 cycle measured with a compression-molded film of the ethylene/α- olefin interpolymer, and has a density, d, in grams/cubic centimeter, wherein the numerical values of Re and d satisfy the following relationship when ethylene/α-olefin interpolymer is substantially free of a cross-linked phase:
Re >1481-1629(d); or (d) has a molecular fraction which elutes between 4O0C and 13O0C when fractionated using TREF, characterized in that the fraction has a molar comonomer content of at least 5 percent higher than that of a comparable random ethylene interpolymer fraction eluting between the same temperatures, wherein said comparable random ethylene interpolymer has the same comonomer(s) and has a melt index, density, and molar comonomer content (based on the whole polymer) within 10 percent of that of the ethylene/α-olefin interpolymer; or 119
(e) has a storage modulus at 250C, G' (250C), and a storage modulus at 1000C, G'(100°C), wherein the ratio of G'(25°C) to G'(100°C) is in the range of about 1:1 to about 9:1;
(B) about 2 to about 15 weight percent of at least one ethylene/carboxylic acid interpolymer or an ionomer thereof based on the total weight of components (A), (B) and (C); and
(C) at least one slip agent.
2. The gasket of claim 1, wherein the ethylene interpolymer of (A) comprises an ethylene/C3-C20 alpha-olefin interpolymer.
3. The gasket of claim 2 wherein the ethylene interpolymer of (A) has:
(i) a density from about 0.85 g/cm3 to about 0.96 g/cm3, (ii) a molecular weight distribution from about 1.8 to about 2.8, (iii) a melt index from about 0.15 g/10 minutes to about 100 g/10 minutes, and (iv) a single melting peak as measured using differential scanning calorimetry.
4. The gasket of claim 1 or 3, wherein the ethylene interpolymer of (A) is further blended with a heterogeneously branched ethylene polymer.
5. The gasket of claim 1 or 3, wherein the ethylene interpolymer of (A) is further blended a heterogeneously branched ethylene interpolymer having:
(i) a density from about 0.86 g/cm3 to about 0.92 g/cm3, and (ii) a melt index from about 0.15 g/10 minutes to about 100 g 10 minutes.
6. The gasket of claim 1 or 3, wherein the ethylene interpolymer comprises from about 85 percent by weight of total composition to about 97.5 percent by weight based on the total weight of the components (A), (B), and (C).
7. The gasket of claim 1 or 3, wherein the ethylene/carboxylic acid interpolymer or ionomer thereof comprises from about 4 percent by weight of total composition to about
12 percent by weight based on the total weight of the components (A), (B), and (C).
8. The gasket of claim 1 or 3, wherein the ethylene/carboxylic acid interpolymer has an acid content from about 3 percent by weight of the interpolymer to about 50 percent by weight of the interpolymer.
9. The gasket of claim 1 or 3, wherein the ethylene/carboxylic acid interpolymer has a melt index from about 0.15 g/10 minutes to about 400 g/10 minutes.
10. The gasket of claim 1 or 3, wherein the slip agent comprises from about 0.05 percent by weight of the total composition to about 5 percent by weight of the total 120
composition.
11. The gasket of claim 1 or 3, wherein the slip agent comprises a primary amide agent and a secondary amide agent, together comprising from about 0.05 percent by weight of the total composition to about 5 percent by weight of the total composition.
12. The gasket of claim 11 , wherein the primary amide agent is present at a level at least twice that of the secondary amide agent.
13. The gasket according to claim 1 or 3, wherein components (A), (B), and (C) of claim 1 together comprise from about 80 percent by weight of the gasket to 100 percent by weight of the gasket.
14. The gasket of claim 1 or 3, wherein the gasket is a foamed gasket.
15. The foamed gasket of claim 14, wherein the foaming agent is selected from the group consisting of physical blowing agents, gaseous blowing agents and chemical blowing agents.
16. The foamed gasket of claim 14, wherein the foaming agent is a chemical blowing agent selected from the group consisting of sodium bicarbonate, dinitrosopentamethylenetetramine, sulfonyl hydrazides, azodicarbonamide, p-toluenesulfonyl semicarbazide, 5-phenyltetrazole, diisopropylhydrazodicarboxylate, 5-phenyl-3,6-dihydro- l,3,4-oxadiazin-2-one, and sodium borohydride.
17. The foamed gasket of claim 14, wherein the foaming agent is a gaseous blowing agent selected from the group consisting of carbon dioxide and nitrogen.
18. The foamed gasket of claim 14, wherein the foaming agent is a physical blowing agent selected from the group consisting of pentanes, hexanes, heptanes, benzene, toluene, dichloromethane, trichloromethane, trichloroethylene, tetrachloromethane, 1,2- dichloroethane, trichlorofluoromethane, 1,1,2-trichlorotrifluoroethane, methanol, ethanol, 2- propanol, ethyl ether, isopropyl ether, acetone, methyl ethyl ketone, and methylene chloride; isobutane and n-butane, 1,1-difluoroethane.
19. The gasket of claim 3, wherein the ethylene/carboxylic acid interpolymer has an acid content from about 3 percent by weight of the interpolymer to about 50 percent by weight of the interpolymer and a melt index from about 0.15 g/10 min. to about 400 g/10 minutes, and the slip agent (C) comprises a primary amide agent and a secondary amide agent, the primary and secondary amide agents together comprising from about 0.05 percent by weight of the total composition to about 5 percent by weight of the total composition. 121
20. The gasket of claim 19, wherein the primary amide agent is present at a level at least twice that of the secondary amide agent.
21. A process for preparing a synthetic cork closure for a liquid container having at least a portion thereof coated with a gas impermeable polymer which comprises providing a synthetic cork closure and coating at least a portion thereof with a gas impermeable polymer, wherein the synthetic closure comprises a composition comprising:
(A) about 80 to about 97.5 weight percent, based on the total weight of components (A), (B) and (C), of at least one ethylene/α-olefin interpolymer; wherein the ethylene/α-olefin interpolymer is a block interpolymer and: (a) has a Mw/Mn from about 1.7 to about 3.5, at least one melting point, Tm, in degrees Celsius, and a density, d, in grams/cubic centimeter, wherein the numerical values of Tm and d correspond to the relationship:
Tm > -2002.9 + 4538.5(d) - 2422.2(d)2, or
(b) has a Mw/Mn from about 1.7 to about 3.5, and is characterized by a heat of fusion, ΔH in J/g, and a delta quantity, ΔT, in degrees Celsiuss defined as the temperature difference between the tallest DSC peak and the tallest CRYSTAF peak, wherein the numerical values of ΔT and ΔH have the following relationships:
ΔT > -0.1299(ΔH) + 62.81 for ΔH greater than zero and up to 130 J/g, ΔT > 48°C for ΔH greater than 130 J/g , wherein the CRYSTAF peak is determined using at least 5 percent of the cumulative polymer, and if less than 5 percent of the polymer has an identifiable CRYSTAF peak, then the CRYSTAF temperature is 300C; or
(c) is characterized by an elastic recovery, Re, in percent at 300 percent strain and 1 cycle measured with a compression-molded film of the ethylene/α- olefin interpolymer, and has a density, d, in grams/cubic centimeter, wherein the numerical values of Re and d satisfy the following relationship when ethylene/α-olefin interpolymer is substantially free of a cross-linked phase:
Re >1481-1629(d); or
(d) has a molecular fraction which elutes between 4O0C and 13O0C when fractionated using TREF, characterized in that the fraction has a molar comonomer content of at least 5 percent higher than that of a comparable random 122 ethylene interpolymer fraction eluting between the same temperatures, wherein said comparable random ethylene interpolymer has the same comonomer(s) and has a melt index, density, and molar comonomer content (based on the whole polymer) within 10 percent of that of the ethylene/α-olefin interpolymer; or (e) has a storage modulus at 25°C, G' (250C), and a storage modulus at 1000C, G'(100°C), wherein the ratio of G'(25°C) to G'(100°C) is in the range of about 1 : 1 to about 9:1.
(B) about 2 to about 15 weight percent of at least one ethylene/carboxylic acid interpolymer or an ionomer thereof based on the total weight of components (A), (B) and (C); and
(C) at least one slip agent.
22. The process of claim 21 wherein the gas impermeable polymer is a vinylidene chloride polymer.
23. The process of claim 22, wherein the gas impermeable polymer is a vinylidene chloride polymer, which is (1) a copolymer of (a) from about 80 to about 93 mole percent vinylidene chloride and (b) from about 20 to about 7 mole percent of at least one monoethylenically unsaturated monomer copolymerizable therewith or (2) a copolymer of (a) from about 65 to about 75 mole percent vinylidene chloride and (b) from about 35 to about 25 mole percent of at least one monoethylenically unsaturated monomer copolymerizable therewith.
24. A polymer blend composition comprising:
(A) at least one ethylene/α-olefin interpolymer and (B) at least one other polymer, wherein the ethylene/α-olefin interpolymer is a block interpolymer and:
(a) has a Mw/Mn from about 1.7 to about 3.5, at least one melting point, Tm, in degrees Celsius, and a density, d, in grams/cubic centimeter, wherein the numerical values of Tm and d correspond to the relationship:
Tm > -2002.9 + 4538.5(d) - 2422.2(d)2, or
(b) has a Mw/Mn from about 1.7 to about 3.5, and is characterized by a heat of fusion, ΔH in J/g, and a delta quantity, ΔT, in degrees Celsius^ defined as the temperature difference between the tallest DSC peak and the tallest CRYSTAF peak, wherein the numerical values of ΔT and ΔH have the following relationships:
ΔT > -0.1299(ΔH) + 62.81 for ΔH greater than zero and up to 130 J/g, 123
ΔT > 480C for ΔH greater than 130 J/g , wherein the CRYSTAF peak is determined using at least 5 percent of the cumulative polymer, and if less than 5 percent of the polymer has an identifiable CRYSTAP peak, then the CRYSTAF temperature is 3O0C; or (c) is characterized by an elastic recovery, Re, in percent at 300 percent strain and 1 cycle measured with a compression-molded film of the ethylene/α- olefin interpolymer, and has a density, d, in grams/cubic centimeter, wherein the numerical values of Re and d satisfy the following relationship when ethylene/α-olefin interpolymer is substantially free of a cross-linked phase: Re >1481-1629(d); or
(d) has a molecular fraction which elutes between 4O0C and 13O0C when fractionated using TREF, characterized in that the fraction has a molar comonomer content of at least 5 percent higher than that of a comparable random ethylene interpolymer fraction eluting between the same temperatures, wherein said comparable random ethylene interpolymer has the same comonomer(s) and has a melt index, density, and molar comonomer content (based on the whole polymer) within 10 percent of that of the ethylene/α-olefin interpolymer; or
(e) has a storage modulus at 250C, G' (250C), and a storage modulus at 1000C, G'(100°C), wherein the ratio of G'(25°C) to G'(100°C) is in the range of about 1 : 1 to about 9: 1 ; or
(f) at least one molecular fraction which elutes between 4O0C and 13O0C when fractionated using TREF, characterized in that the fraction has a block index of at least 0.5 and up to about 1 and a molecular weight distribution, Mw/Mn, greater than about 1.3; or
(g) an average block index greater than zero and up to about 1.0 and a molecular weight distribution, Mw/Mn, greater than about 1.3.
25. The composition of claim 24, wherein the other polymer is selected from a second ethylene/α-olefin interpolymer, an elastomer, a polyolefin, a polar polymer, and an ethylene/carboxylic acid interpolymer or ionomer thereof, the second ethylene/α-olefm interpolymer is different that the first ethylene/α-olefin interpolymer and the second ethylene/α-olefin interpolymer: 124
(a) has a Mw/Mn from about 1.7 to about 3.5, at least one melting point, Tm, in degrees Celsius, and a density, d, in grams/cubic centimeter, wherein the numerical values of Tm and d correspond to the relationship:
Tm > -2002.9 + 4538.5(d) - 2422.2(d)2, or (b) has a Mw/Mn from about 1.7 to about 3.5, and is characterized by a heat of fusion, ΔH in J/g, and a delta quantity, ΔT, in degrees Celsius., defined as the temperature difference between the tallest DSC peak and the tallest CRYSTAF peak, wherein the numerical values of ΔT and ΔH have the following relationships:
ΔT > -0.1299(ΔH) + 62.81 for ΔH greater than zero and up to 130 J/g, ΔT > 480C for ΔH greater than 130 J/g , wherein the CRYSTAF peak is determined using at least 5 percent of the cumulative polymer, and if less than 5 percent of the polymer has an identifiable CRYSTAF peak, then the CRYSTAF temperature is 3O0C; or
(c) is characterized by an elastic recovery, Re, in percent at 300 percent strain and 1 cycle measured with a compression-molded film of the ethylene/α- olefin interpolymer, and has a density, d, in grams/cubic centimeter, wherein the numerical values of Re and d satisfy the following relationship when ethylene/α-olefin interpolymer is substantially free of a cross-linked phase:
Re >1481-1629(d); or (d) has a molecular fraction which elutes between 4O0C and 13O0C when fractionated using TREF, characterized in that the fraction has a molar comonomer content of at least 5 percent higher than that of a comparable random ethylene interpolymer fraction eluting between the same temperatures, wherein said comparable random ethylene interpolymer has the same comonomer(s) and has a melt index, density, and molar comonomer content (based on the whole polymer) within 10 percent of that of the ethylene/α-olefϊn interpolymer; or
(e) has a storage modulus at 250C, G' (250C), and a storage modulus at 1000C, G'(100°C), wherein the ratio of G'(25°C) to G'(100°C) is in the range of about 1:1 to about 9:1; or 125
(f) at least one molecular fraction which elutes between 4O0C and 13O0C when fractionated using TREF, characterized in that the fraction has a block index of at least 0.5 and up to about 1 and a molecular weight distribution, Mw/Mn, greater than about 1.3; or
(g) an average block index greater than zero and up to about 1.0 and a molecular weight distribution, Mw/Mn, greater than about 1.3.
26. The composition of claim 24 or 25, wherein the first ethylene/α-olefin interpolymer is present in an amount ranging from about 9% to 99.5% and the second ethylene/α-olefin interpolymer is present in an amount ranging from about 9% to 99.5% by weight of the total weight of the composition.
27. The composition of claim 24 or 25, wherein the other polymer is an elastomer selected from a thermoplastic vulcanizate, styrenic block copolymer, neoprene, functionalized elastomers, polybutadiene rubber, butyl rubber or a combination thereof.
28. The composition of claim 24 or 25, wherein the other polymer is a polyolefin selected from LDPE, LLDPE, HDPE, EVA, EAA, EMA, ionomers thereof, metallocene LLDPE, impact grade propylene polymer, random grade propylene polymer, polypropylene and a combination thereof.
29. The composition of claim 24 or 25, wherein the other polymer is a polar polymer selected from nylon, polyamide, ethylene vinyl acetate, polyvinyl chloride, acrylonitrile/butadiene/styrene (ABS) copolymers, aromatic polycarbonate, ethylene / carboxylic acid copolymers, polyacrylic and a combination thereof.
30. The composition of claim 24 or 25, wherein the other polymer is an olefin/carboxylic acid interpolymer selected from ethylene-acrylic acid copolymer, ethylene- methacrylic acid copolymer, ethylene-itaconic acid copolymer, ethylene-methyl hydrogen maleate copolymer, ethylene-maleic acid copolymer, ethylene-acrylic acid copolymer, ethylene-methacrylate copolymer, ethylene-methacrylic acid-ethacrylate copolymer, ethylene-itaconic acid- methacrylate copolymer, ethylene-itaconic acid-methacrylate copolymer, ethylene-methyl hydrogen maleate-ethyl acrylate copolymer, ethylene- methacrylic acid-vinyl acetate copolymer, ethylene-acrylic acid copolymer, ethylene-acrylic acid- vinyl alcohol copolymer, ethylene-acrylic acid-carbon monoxide copolymer, ethylene- propylene-acrylic acid copolymer, ethylene-methacrylic acid-acrylonitrile copolymer, ethylene-fumaric acid- vinyl methyl ether copolymer, ethylene- vinyl chloride-acrylic acid copolymer, ethylene-vinylidene chloride-acrylic acid copolymer, ethylene-vinylidene 126
chloride-acrylic acid copolymer,ethylene-vinyl fluoride-methacrylic acid copolymes, ethylene-chlorotrifluoroethlyene-methacrylic acid copolymer, or a combination thereof.
31. The composition of claim 24 or 25, further comprising an additive selected from a slip agent, an anti-blocking agent, a plasticizer, an antioxidant, a UV stabilizer, a colorant, a filler, a lubricant, an antifogging agent, a flow aid, a acoupling agent, a cross- linking agent, a nucleating agent, a surfactant, a solvent, a flame retardant, an antistatic agent, an extender, an odor absorber, a barrier resin and a combination thereof.
32. The composition of claim 31, wherein the slip agent is polymethylsiloxane, erucamide, oleamide or a combination thereof.
33. The composition of claim 31 , wherein the odor absorber is calcium carbonate, activated charcoal or a combination thereof.
34. The composition of claim 31 , wherein the barrier resin is ethylene vinyl alcohol (EVOH) copolymer or polyvinylidene chloride (PVDC).
35. The composition of claim 31, wherein the extender is a mineral oil, polybutene, siloxane, or a combination thereof.
36. A gasket comprising the composition of any of claims 24-35.
37. The gasket of claim 36, wherein the ethylene/carboxylic acid interpolymer or ionomer thereof comprises from about 4 percent to about 12 percent by weight of total composition.
38. The gasket of claim 37, wherein the ethylene/carboxylic acid interpolymer has an acid content from about 3 percent by weight of the interpolymer to about 50 percent by weight of the interpolymer.
39. The gasket of claim 36, wherein the slip agent comprises a primary amide agent and a secondary amide agent, together comprising from about 0.05 percent by weight of the total composition to about 5 percent by weight of the total composition.
40. The gasket of claim 39, wherein the primary amide agent is present at a level at least twice that of the secondary amide agent.
41. The gasket of claim 36, wherein the slip agent comprises a silane compound.
42. The gasket of claim 36, wherein the gasket is foamed using a foaming agent.
43. The gasket of claim 42, wherein the foaming agent is selected from a group consisting of physical blowing agents, gaseous blowing agents and chemical blowing agents.
44. The gasket of claim 42, wherein the foaming agent is a chemical blowing agent selected from a group consisting of sodium bicarbonate, 127 dinitrosopentamethylenetetramine, sulfonyl hydrazides, azodicarbonamide, p-toluenesulfonyl semicarbazide, 5-phenyltetrazole, diisopropylhydrazodicarboxylate, 5-phenyl-3,6-dihydro- l,3,4-oxadiazin-2-one, and sodium borohydride.
45. The gasket of claim 42, wherein the foaming agent is a gaseous blowing agent selected from the group consisting of carbon dioxide and nitrogen.
46. The gasket of claim 43, wherein the foaming agent is a physical blowing agent selected from a group consisting of pentanes, hexanes, heptanes, benzene, toluene, dichloromethane, trichloromethane, trichloroethylene, tetrachloromethane, 1,2- dichloroethane, trichlorofluoromethane, 1,1,2-trichlorotrifluoroethane, methanol, ethanol, 2- propanol, ethyl ether, isopropyl ether, acetone, methyl ethyl ketone, and methylene chloride; isobutane and n-butane, 1,1-difluoroethane.
47. The gasket of claim 36, wherein the ethelyne/α-olefin interpolymer comprises from about 25 to about 35% by weight of the composition, the other polymer comprises from about 55 to about 65 % by weight of the composition, and the slip agent comprises from about 1 to about 3 % by weight of the composition.
48. The gasket of claim 36, wherein the composition has either a static coefficient of friction or a dynamic coefficient of friction, or both, of less than about 1.
49. The gasket of claim 36, wherein the composition has either a static coefficient of friction or a dynamic coefficient of friction, or both, of about 0.6 or less.
50. The gasket of claim 36, wherein the compostion has a melt index greater than or equal to about 5 g/10 minutes and a 7O0C compression set of less than 70% and the change is compression set between 230C and 7O0C is less that 55%.
51. The composition of claim 31 , wherein a gasket made from the composition is free of odor.
52. The composition of claim 31 , wherein the extender is a substantially linear ethylene polymer having a melt index, I2, from about 100 to about 1,000.
53. The composition of claim 27, wherein the styrenic block copolymer is a SEBS block copolymer with a melt index of less than 0.1.
54. A process for preparing a synthetic cork closure for a liquid container having at least a portion thereof coated with a gas impermeable polymer which comprises providing a synthetic cork closure and coating at least a portion thereof with a gas impermeable polymer, wherein the synthetic closure comprises a composition comprising: 128
(A) about 80 to about 97.5 weight percent, based on the total weight of components (A), (B) and (C), of at least one ethylene/α-olefin interpolymer; wherein the ethylene/α-olefϊn interpolymer is a block interpolymer and:
(a) has a Mw/Mn from about 1.7 to about 3.5, at least one melting point, Tm, in degrees Celsius, and a density, d, in grams/cubic centimeter, wherein the numerical values of Tm and d correspond to the relationship:
Tm > -2002.9 + 4538.5(d) - 2422.2(d)2, or
(b) has a Mw/Mn from about 1.7 to about 3.5, and is characterized by a heat of fusion, ΔH in J/g, and a delta quantity, ΔT, in degrees CelsiuSj defined as the temperature difference between the tallest DSC peak and the tallest CRYSTAF peak, wherein the numerical values of ΔT and ΔH have the following relationships:
ΔT > -0.1299(ΔH) + 62.81 for ΔH greater than zero and up to 130 J/g, ΔT > 480C for ΔH greater than 130 J/g , wherein the CRYSTAF peak is determined using at least 5 percent of the cumulative polymer, and if less than 5 percent of the polymer has an identifiable CRYSTAF peak, then the CRYSTAF temperature is 3O0C; or
(c) is characterized by an elastic recovery, Re, in percent at 300 percent strain and 1 cycle measured with a compression-molded film of the ethylene/α- olefin interpolymer, and has a density, d, in grams/cubic centimeter, wherein the numerical values of Re and d satisfy the following relationship when ethylene/α-olefin interpolymer is substantially free of a cross-linked phase:
Re >1481-1629(d); or
(d) has a molecular fraction which elutes between 4O0C and 13O0C when fractionated using TREF, characterized in that the fraction has a molar comonomer content of at least 5 percent higher than that of a comparable random ethylene interpolymer fraction eluting between the same temperatures, wherein said comparable random ethylene interpolymer has the same comonomer(s) and has a melt index, density, and molar comonomer content (based on the whole polymer) within 10 percent of that of the ethylene/α-olefin interpolymer; or (e) has a storage modulus at 250C, G' (250C), and a storage modulus at 1000C, C(IOO0C), wherein the ratio of G'(25°C) to G'(100°C) is in the range of about 1:1 to about 9:1; or
(f) at least one molecular fraction which elutes between 4O0C and 13O0C when fractionated using TREF, characterized in that the fraction has a block index of at least 0.5 and up to about 1 and a molecular weight distribution, Mw/Mn, greater than about 1.3; or
(g) an average block index greater than zero and up to about 1.0 and a molecular weight distribution, Mw/Mn, greater than about 1.3.
PCT/US2006/009501 2005-03-17 2006-03-15 Cap liners, closures and gaskets from multi-block polymers WO2006113000A2 (en)

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AU2006237514A AU2006237514B2 (en) 2005-03-17 2006-03-15 Cap liners, closures and gaskets from multi-block polymers
JP2008502036A JP5227786B2 (en) 2005-03-17 2006-03-15 Cap liners, closures and gaskets from multi-block polymers
BRPI0609824-0A BRPI0609824B1 (en) 2005-03-17 2006-03-15 POLYMERIC MIXTURE AND GASKET COMPOSITION
CA002601263A CA2601263A1 (en) 2005-03-17 2006-03-15 Cap liners, closures and gaskets from multi-block polymers
MX2007011334A MX2007011334A (en) 2005-03-17 2006-03-15 Cap liners, closures and gaskets from multi-block polymers.
CN2006800083690A CN101426880B (en) 2005-03-17 2006-03-15 Cap liners, closures and gaskets from multi-block polymers
US11/908,951 US7592397B2 (en) 2005-03-17 2006-03-15 Cap liners, closures, and gaskets from multi-block polymers
EP06769781.3A EP1877513B1 (en) 2005-03-17 2006-03-15 Cap liners, closures and gaskets from multi-block polymers

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PCT/US2005/008917 WO2005090427A2 (en) 2004-03-17 2005-03-17 Catalyst composition comprising shuttling agent for ethylene multi-block copolymer formation
US71782405P 2005-09-16 2005-09-16
US60/717,824 2005-09-16

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