Patent ID: 7632894

Claim:
A masterbatch consisting essentially of a solid blend of an elastomeric polyolefin, a thermoplastic polyolefin, and triallyl cyanurate, wherein the portion made up of the elastomeric polyolefin and the thermoplastic polyolefin is in the form of an elastomer-containing thermoplastic polyolefin composition comprising (parts and percent by weight): A. from 10 to 60 parts of a homopolymer of propylene or a random copolymer of propylene with ethylene and/or a C 4 -C 8 α-olefin, containing more than 80% of propylene, said homopolymer or copolymer being insoluble in xylene at ambient temperature for more than 80%; B. from 0 to 25 parts of an essentially linear semicrystalline copolymer of ethylene containing propylene and/or a C 4 -C 8 α-olefin, insoluble in xylene at ambient temperature; and C. from 15 to 87 parts of a copolymer of ethylene with propylene and/or a C 4 -C 8 α-olefin, or mixture thereof, and optionally minor quantities of diene, said copolymer containing from 25 to 75% of ethylene and being soluble in xylene at ambient temperature.