Impact-resistant polymer blends of olefin polymers, polyamides, and terpolymer compatibilizers

A blended polymer composition comprising:

• (I) from about 30% to about 90% by weight of at least one polypropylene or copolymer of ethylene and propylene;
• (II) from about 5% to about 25% by weight of at least one polyamide;
• (III) from about 0.1% to about 2.5% of a compatibilizing agent which comprises at least one terpolymer of an alpha-olefin, an acrylic ester, and an alpha,beta-olefinically unsaturated dicarboxylic acid reagent, or a glycidyl acrylate;
• and
• (IV) from 0.1% to about 2.5% by weight of at least one auxiliary compatibilizing agent selected from at least one selectively hydrogenated styrene-ethylene-butylene-styrene block copolymer to which has been grafted, an alpha,beta-olefinically unsaturated carboxylic acid reagent, provided that the blended polymer is free of other polymers of vinyl aromatic hydrocarbons.

A blended polymer composition comprising:

• (I) from about 30% to about 90% by weight of at least one polypropylene or copolymer of ethylene and propylene;
• (II) from about 5% to about 25% by weight of at least one polyamide;
• (III) from about 0.1% to about 2.5% of a compatibilizing agent which comprises at least one terpolymer of an alpha-olefin, an acrylic ester, and an alpha,beta-olefinically unsaturated dicarboxylic acid reagent, or a glycidyl acrylate;
• and
• (IV) from 0.1% to about 2.5% by weight of at least one auxiliary compatibilizing agent selected from 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 carboxylic acid reagent, provided that the blended polymer is free of other polymers of vinyl aromatic hydrocarbons.

A blended polymer composition which comprises:

• (I) from about 70% to about 90% by weight of at least one 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 0.1 to about 25% by weight of at least one terpolymer of
• (i) ethylene or propylene,
• (ii) an acrylic ester, and
• (iii) maleic acid, maleic anhydride or glycidyl acrylate;
• and
• (IV) from about 0.1 to about 10% of at least one auxiliary compatibilizer selected from the group consisting of
• (IVa) 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
• provided that the blended polymer is free of any other polymers of vinyl aromatic hydrocarbons.