Patent ID: 6433063
Filing Date: 2002-08-13
Classification: C08K,C08L

Abstract:
A composition comprising, by weight:(1) 100 parts of a thermoplastic olefin comprising an olefin polymer having an isotactic index of at least 80 and an olefin polymer rubber, the thermoplastic olefin having a rubber content of at least 20%; (2) about 5 to about 20 parts per hundred parts of the thermoplastic olefin of a propylene homopolymer or propylene copolymer with ethylene or a C4-8 &agr;-olefin having an ethylene or &agr;-olefin content of about 0.5% to about 20%, grafted with an anhydride of an aliphatic &agr;,&bgr;-unsaturated dicarboxylic acid and having an anhydride content of about 2% to about 5%; (3) about 3 to about 20 parts per hundred parts of the thermoplastic olefin of an oxidized polyethylene wax having a melting point of less than 116Â° C. and an acid number of less than 40; (4) a functionalized polymer that is reactive with the anhydride groups of the grafted polymers, selected from the group consisting of: (a) about 2 to about 6 parts per hundred parts of the thermoplastic olefin of an amine-terminated polyalkylene glycol; (b) about 2 to about 6 parts per hundred parts of the thermoplastic olefin of a hydroxy-terminated polyolefin, (c) about 2 to about 6 parts per hundred parts of the thermoplastic olefin of a hydroxy-terminated polybutadiene; (d) about 2 to about 8 parts per hundred parts of the thermoplastic olefin of a hydroxy-terminated olefin/alkylene oxide copolymer; (e) about 2 to about 8 parts per hundred parts of the thermoplastic olefin of a hydroxy-terminated polyalkylene oxide, (f) about 2 to about 8 parts per hundred parts of the thermoplastic olefin of a methoxy-terminated polyalkylene oxide, (g) about 2 to about 8 parts per hundred parts of the thermoplastic olefin of an amine-terminated olefin/alkylene oxide copolymer, and (h) mixtures thereof; (5) about 2 to about 20 parts per hundred parts of the thermoplastic olefin of an epichlorohydrin rubber; (6) optionally, about 5 to about 30 parts per hundred parts of the thermoplastic olefin of an olefin polymer rubber grafted with an anhydride of an aliphatic &agr;,&bgr;-unsaturated dicarboxylic acid, having an anhydride content of at least 0.3% but less than 3% and comprising a polymer of ethylene and a C3-8 &agr;-olefin, optionally containing about 0.5% to about 10% of a diene, which contains about 30% to about 70% ethylene; (7) optionally about 5 to about 20 parts per hundred parts of the thermoplastic olefin of an ethylene polymer grafted with an anhydride of an aliphatic &agr;,&bgr;-unsaturated dicarboxylic acid. having an anhydride content of about 1% to about 16% and a number average molecular weight Mn of about 500 to about 5000, provided that at least 5 parts of anhydride-grafted polypropylene or propylene copolymer and 3 parts of oxidized polyethylene wax per hundred parts of the thermoplastic olefin are also present; (8) optionally about 5 to about 20 parts per hundred parts of (b) an hydrogenated polymer of styrene or alkyl-substituted styrene, having a number average molecular weight Mn ranging between about 600 and about 20,000; and (9) optionally about 0.1 to about 5 parts per hundred parts of the thermoplastic olefin of an organic sulfonic acid salt of a group I or II metal.