| 摘要 |
PURPOSE: Thermoplastic elastomeric composition is provided to have greater softness, lower hardness, and improved melt flow without an increase in the amount of oil. CONSTITUTION: 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 end blocks, each having a molecular weight of at least 20,000, and a mid block of hydrogenated polymerized butadiene wherein at least 51 mole percent of butadiene has polymerized at the 1,2-position, and wherein 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 %.
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