THERMOPLASTIC ELASTOMER COMPOSITION AND MOLDED ARTICLE

PROBLEM TO BE SOLVED: To provide a thermoplastic elastomer composition excellent in processability that gives a molded article having a large tensile strength, a low hardness and excellent in compression set, and to provide its molded article. SOLUTION: The thermoplastic elastomer composition comprises (A) a specific polymer mixture comprising (a) 55-95 wt% of an aromatic vinyl-isoprene block copolymer having two or more aromatic vinyl polymer blocks with a specific average mol. wt., (b) 0-40 wt% of an aromatic vinyl-isoprene diblock copolymer and (c) 5-33 wt% of a polyisoprene with a specific average mol. wt., wherein the content of the aromatic vinyl monomer units to the total amount of the components (a), (b) and (c) is specific and (B) a compatible resin comprising a coumarone indene resin, polystyrene resin, styrene-vinyltoluene copolymer, vinyltoluene-α-methylstyrene copolymer, or polyindene resin. In the composition the formulation weight ratio of the component (c) and the component (B) is specific. COPYRIGHT: (C)2006,JPO&NCIPI