Impact-resistant compatibilized polymer blends of olefin polymers and polyamides
First Claim
1. A blended polymer composition comprising(I) from about 60% to about 90% by weight of at least one alpha-olefin polymer selected from the group consisting of polypropylene and copolymers of ethylene and propylene;
- (II) from about 5% to about 25% by weight of at least one polyamide;
(III) from about 5% to about 25% by weight of at least one copolymer of a vinyl aromatic hydrocarbon and an unsaturated mono-or dicarboxylic acid reagent, wherein the copolymer is other than a graft copolymer; and
(IV) from about 1% up to about 25% by weight of a mixture of two or more compatibilizing agents selected from the group consisting of(IVa) at least one selectively hydrogenated block copolymer of a vinyl aromatic hydrocarbon and a conjugated diene;
(IVb) at least one selectively hydrogenated block copolymer of a vinyl aromatic hydrocarbon and a conjugated diene to which has been grafted, an alpha, beta-olefinically unsaturated monocarboxylic or dicarboxylic acid reagent; and
(IVc) at least one terpolymer of an alpha-olefin, at least one acrylic ester, and an alpha, beta-olefinically unsaturated dicarboxylic acid reagent, or a glycidyl acrylate, wherein (IV) comprises mixtures of (IVa) and (IVb), (IVa) and (IVc), (IVb) and (IVc), or (IVa), (IVb), and (IVc).
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Abstract
Blended polymer compositions are described which comprise
(I) from about 1% to about 97% by weight of at least one alpha-olefin polymer;
(II) from about 1% to about 97% by weight of at least one polyamide;
(III) from about 1% to about 97% by weight of at least one polymer of a vinyl aromatic hydrocarbon; and
(IV) an effective amount of a mixture of two or more compatibilizing agents selected from the group consisting of
(IVa) at least one selectively hydrogenated block copolymer of a vinyl aromatic hydrocarbon and a conjugated diene;
(IVb) at least one selectively hydrogenated block copolymer of a vinyl aromatic hydrocarbon and a conjugated diene to which has been grafted, an alpha,beta-olefinically unsaturated monocarboxylic or dicarboxylic acid reagent; and
(IVc) at least one terpolymer of an alpha-olefin, at least one acrylic ester, and an alpha,beta-olefinically unsaturated dicarboxylic acid reagent, or a glycidyl acrylate.
The polymer blends of the present invention have improved impact-resistance.
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Citations
21 Claims
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1. A blended polymer composition comprising
(I) from about 60% to about 90% by weight of at least one alpha-olefin polymer selected from the group consisting of polypropylene and copolymers of ethylene and propylene; -
(II) from about 5% to about 25% by weight of at least one polyamide; (III) from about 5% to about 25% by weight of at least one copolymer of a vinyl aromatic hydrocarbon and an unsaturated mono-or dicarboxylic acid reagent, wherein the copolymer is other than a graft copolymer; and (IV) from about 1% up to about 25% by weight of a mixture of two or more compatibilizing agents selected from the group consisting of (IVa) at least one selectively hydrogenated block copolymer of a vinyl aromatic hydrocarbon and a conjugated diene; (IVb) at least one selectively hydrogenated block copolymer of a vinyl aromatic hydrocarbon and a conjugated diene to which has been grafted, an alpha, beta-olefinically unsaturated monocarboxylic or dicarboxylic acid reagent; and (IVc) at least one terpolymer of an alpha-olefin, at least one acrylic ester, and an alpha, beta-olefinically unsaturated dicarboxylic acid reagent, or a glycidyl acrylate, wherein (IV) comprises mixtures of (IVa) and (IVb), (IVa) and (IVc), (IVb) and (IVc), or (IVa), (IVb), and (IVc). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A blended polymer composition comprising
(I) from about 70% to about 90% by weight of at least one alpha-olefin polymer selected from the group consisting of polyethylene, and polypropylene, (II) from about 5% to about 25% by weight of at least one polyamide having a number average molecular weight of at least about 5000; -
(III) from about 5% to about 25% by weight of a copolymer of styrene and maleic anhydride; and (IV) from about 1% to about 25% by weight of a mixture of two or more compatibilizing agents selected from the group consisting of (IVa) at least one selectively hydrogenated block copolymer of a vinyl aromatic hydrocarbon and an aliphatic conjugated diene; (IVb) at least one selectively hydrogenated block copolymer of a vinyl aromatic hydrocarbon and an aliphatic conjugated diene to which has been grafted an alpha, beta-olefinically unsaturated monocarboxylic or dicarboxylic acid reagent; and (IVc) at least one terpolymer of ethylene or propylene, an acrylic ester and maleic acid, maleic anhydride, or a glycidyl acrylate. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21)
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Specification