Patent ID: 7105600

Claim:
A polymer composition prepared by subjecting a crosslinkable polymer composition to dynamic crosslinking, the crosslinkable polymer composition consisting essentially of: (a) a block copolymer comprising two or more polymer blocks A of a vinyl aromatic compound and one or more polymer blocks B of a conjugated diene, the polymer block B being either hydrogenated or unhydrogenated; (b) an olefin copolymer having a density of 0.88 to 0.92 g/cm 3 and obtained through copolymerization of ethylene and an α-olefin having 4 to 12 carbon atoms; (c) a softening agent; and (d) an organic peroxide, the respective amounts of components satisfying the following expressions {circle around (1)} to {circle around (3)}: 0.66 ≦Wb/Wa ≦4 {circle around (1)} 0 ≦Wc /( Wa+Wb+Wc )≦0.25 {circle around (2)} 0.001 ≦Wd /( Wa+Wb+Wc )≦0.01 {circle around (3)} wherein Wa, Wb, Wc and Wd represent the respective amounts by weight of the block copolymer (a), the olefin copolymer (b), the softening agent (c) and the organic peroxide (d) that are present in the polymer composition prior to dynamic crosslinking.