The thermoplastic elastomer composition and a powder slush molding materials for powder slush molding

摘要

PROBLEM TO BE SOLVED: To obtain an elastomer composition having a low melt viscosity and powder fluidity and giving a molding improved in mold release and tensile strength by making the composition contain a polypropylene resin with a hydrogenated styrene/butadiene random copolymer rubber, a process oil, a long-chain- structure ethylene/octene copolymer, an adhesion modifier, and an internal release agent. ;SOLUTION: This composition has a melt flow rate of 5 g/10 min or above and is obtained by mixing 100 pts.wt., in total, 80-20 wt.% (A) polypropylene resin having a melt flow rate (JIS K7210, at 230°C under a load of 2.16 kg) of 20 g/10 min or above and 20-80 wt.% (B) hydrogenated styrene/butadiene copolymer rubber having a styrene content of 30 wt.% or below with 5-200 pts.wt. (C) process oil, 20-250 pts.wt., per 100 pts.wt. component B, (D) long-chain- structure ethylene/octene copolymer, 2-20 wt.% (E) adhesion modifier, and 0.1-5.0 wt.% (F) internal release agent and melt-kneading the mixture at a temp. of 120-250°C.;COPYRIGHT: (C)2000,JPO