Moldable polyblends of polyolefins and styrenic resins

Claim 1

A moldable polyblend composition comprising: (a) from about 40 to 80 weight percent of an olefin polymer, wherein the olefin polymer has a melt flow rate of less than 15 g/10 minutes and at least about 50 weight percent of the olefin polymer is a crystalline propylene polymer; (b) from about 5 to 40 weight percent of a rubber-modified styrenic resin comprised of from about 65 to 95 weight percent of a random thermoplastic copolymer of (i) from about 35 to 99 weight percent of a vinyl aromatic monomer; (ii) from about 1 to 30 weight percent of an α, β-unsaturated dicarboxylic acid derivative; and (iii) from 0 to about 35 weight percent of an ethylenically unsaturated monomer selected from the group consisting of unsaturated nitriles, α,β-unsaturated mono-carboxylic acids, C 1 -C 4 alkyl esters of α,β-unsaturated mono-carboxylic acids, and their mixtures; and from about 5 to 35 weight percent of a rubber selected from the group consisting of conjugated diene rubbers and ethylene propylene diene monomer rubbers, wherein said rubber is grafted with the random thermoplastic copolymer; and (c) from about 3 to 40 weight percent of a compatibilizer selected from the group consisting of mono-cinyl aromatic monomer/conjugated diene block copolymers, hydrogenated mono-vinyl aromatic monomer/conjugated diene block copolymers, and mixtures thereof.