Thermoplastic nitrile resin blends

Claim 1

The blend composed of 100 parts by weight of (I) a polymer prepared by the polymerization of 100 parts by weight of (A) from 50 to 90% by weight of at least one nitrile having the structure ##STR8## wherein R is hydrogen, a lower alkyl group having from 1 to 4 carbon atoms, or a halogen, and (B) from 10 to 50% by weight based on the combined weight of (A) and (B) of at least one member selected from the group consisting of (1) styrene, (2) an ester having the structure ##STR9## wherein R 1 is hydrogen, an alkyl group having from 1 to 4 carbon atoms, or a halogen, and R 2 is an alkyl group having from 1 to 6 carbon atoms, (3) an alpha-olefin having the structure ##STR10## wherein R' and R" are alkyl groups having from 1 to 7 carbon atoms, (4) a vinyl ether selected from the group consisting of methyl vinyl ether, ethyl vinyl ether, the propyl vinyl ethers, and the butyl vinyl ethers, and (5) vinyl acetate, and from 5 to 15 parts by weight of (II) a polymer resulting from the copolymerization of (A) from 50 to 90% by weight of at least one nitrile having the structure ##STR11## wherein R has the foregoing designation, (B) from 10 to 50% by weight of indene, and (C) from 0 to 40% by weight of an ester having the structure ##STR12## wherein R 1 and R 2 have the foregoing designations.