Patent ID: 7858202

Claim:
A composite body comprising a polyacetal portion and a modified thermoplastic vulcanizate portion, wherein one or more moldings comprising the modified thermoplastic vulcanizate portion is directly molded on a molding comprising the polyacetal portion such that the one or more modified thermoplastic vulcanizate molding partially or completely covers the polyacetal molding forming distinct bonded layers, wherein the strength of the bond between the polyacetal molding and the directly molded on one or more modified thermoplastic vulcanizate molding is at least 0.5 N/mm, wherein the modified thermoplastic vulcanizate portion comprises a modified thermoplastic vulcanizate elastomer having a hardness of 30 to 90 Shore A and wherein the modified thermoplastic vulcanizate elastomer comprises: (a) 2 to 75% by weight of an at least partially crosslinked ethylene-propylene-diene rubber in from 1 to 50% by weight of a polyolefinic matrix further comprising 0.05to 10% by weight of an ingredient selected from the group consisting of stabilizers, crosslinking aids, and mixtures thereof, wherein the polyolefinic matrix comprises polyethylene, polypropylene, or copolymers of polyethylene and polypropylene; (b) 1 to 30% by weight of a compatibilizer, wherein the compatibilizer comprises a component selected from the group consisting of functionalized styrene-olefin block copolymers, methacrylate-butadiene-styrenes, methyl methacrylate-acrylonitrile-butadiene-styrenes, functionalized ethylene-propylene-diene rubbers, ethylenepropylene rubber, and mixtures thereof; and (c) 10 to 70% by weight of a non-olefinic thermoplastic material, wherein the non-olefinic thermoplastic material comprises a polymeric material selected from the group consisting of thermoplastic polyester urethane elastomers, thermoplastic polyether urethane elastomers, thermoplastic polyesters, thermoplastic polyesterester elastomers, thermoplastic polyetherester elastomers, thermoplastic polyetheramide elastomers, thermoplastic polyamides, thermoplastic polycarbonates, thermoplastic polyacrylates, acrylate rubbers, styrene-acrylonitrile-acrylate rubbers, and mixtures thereof, wherein components (a), (b), and (c) are compounded, all percentages by weight based on a total weight of the modified thermoplastic vulcanizate elastomer.