| 摘要 |
PROBLEM TO BE SOLVED: To obtain a thermoplastic elastomer composition which improves the compression set in a high temperature region by using a polybutadiene having a 1,4-structure content of≥70% and/or a polyisoprene having a 1,4-structure content of≥70% in a small amount of a curing agent and has good compatibility and excellent extrusion and injection moldability, and to provided its molded product. SOLUTION: This thermoplastic elastomer composition comprises (a) 100 pts.wt. polybutadiene having a 1,4-structure content of≥70% and/or polyisoprene having a 1,4-structure content of≥70%, (b) 10-80 pts.wt. ethylene resin which is obtained by the polymerization with a single site catalyst and has a density of 0.85-0.91 g/cm<SP>3</SP>, and (c) 1-10 pts.wt. curing agent, and improves the compression set in a high temperature region in a small amount of the curing agent, and the molded product is obtained by molding this composition. Due to the above properties, the thermoplastic elastomer composition can be suitably used as a material for automotive parts centering on a brake part, parts of a hydraulic- or air-actuated apparatus, elastic polymer parts, and the like. COPYRIGHT: (C)2005,JPO&NCIPI
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