| 摘要 |
PURPOSE:To easily form a smooth sheet and to obtain enough rubber elasticity by incorporating a specified thermoplastic elastomer block copolymer, conjugate diene elastomer copolymer, elastomer compsn., etc. CONSTITUTION:This elastomer compsn. contains a thermoplastic elastomer block copolymer (a), elastomer copolymer (b), and elastomer polymer (c). The copolymer (a) contains a polymer block (B) essentially consisting of conjugate dienes between two polymer blocks (A) essentially consisting of aromatic vinyl compd. The elastomer copolymer (b) consists of monomers having at least two non-conjugate double bonds and conjugate diene monomers or vinyl monomers which are copolymerizable with these monomers. The elastomer polymer (c) consists of copolymer of conjugate diene monomers or vinyl monomers which are copolymerizable with these diene monomers, or derivs. of these. The proportion of each component is (a): 5-25wt.%, (b):15-60wt.%, and (c): 5-40wt.%. |
