HIGH 1,2-CONTENT THERMOPLASTIC ELASTOMER OIL POLYOLEFIN COMPOSITION

摘要

The present invention relates to a thermoplastic elastomeric composition comprising: a base composition comprising: (i) 15 to 60 weight percent of a block copolymer having at least two polymerized monovinyl aromatic endblocks, each having a molecular weight of at least 20,000, and a midblock of hydrogenated polymerized butadiene wherein at least 51 mole percent of said butadiene has polymerized at the 1,2-position, and wherein said block copolymer has a molecular weight of at least 130,000, (ii) 5 to 80 weight percent of a paraffinic oil, and (iii) 5 to 25 weight percent of a crystalline polyolefin having a crystallinity of at least 50 %. The present invention further relates to a process for preparing a thermoplastic elastomeric composition and to articles containing the thermoplastic elastomeric composition.