Patent ID: 6576699
Filing Date: 2003-06-10
Classification: C08L

Abstract:
A damping resin composition, comprising:100 parts by weight of a polymer blend of 40 to 70% by weight of a polypropylene resin and 30 to 60% by weight of a thermoplastic elastomer; and 5 to 60 parts by weight of an inorganic filler, wherein the thermoplastic elastomer comprises: a first styrene-isoprene-styrene elastomeric copolymer having a glass transition temperature of 0Â° C. to 20Â° C., the polyisoprene blocks of said first copolymer having a vinyl structure, and a second styrene-isoprene-styrene elastomeric copolymer having a glass transition temperature of âˆ’20Â° C. to 0Â° C., the polyisoprene blocks of said second copolymer having a vinyl structure; and an ethylene-&agr;-olefin elastomer; wherein said damping resin composition has a damping tan&dgr; of 0.05 or more in a temperature range of from âˆ’40Â° C. to 40Â° C. and an Izod impact strength of 30 J/m or more under âˆ’30Â° C.