| abstract |
PURPOSE: To provide a resin composition having excellent flexibility, high-temperature strength, etc., by blending isotactic polypropylene and an ethylene/ acrylate copolymer with a specified block copolymer composed of an arom. vinyl polymer and a conjugated diene polymer. n CONSTITUTION: A block copolymer composed of blocks (A) which form both terminals of the copolymer, accounts for 10W40wt% of the copolymer and are composed of an arom. vinyl polymer (e.g. polystyrene) of which not more than 10% is hydrogenated and an intermediate block (B) which is composed of a conjugated diene polymer (e.g. polybutadiene) of which not less than 90% is hydrogenated, is prepd. 5W40wt% isotactic polypropylene having an m.p. of 150°C or higher or copolymer mainly composed of the same and 5W40wt% ethylene/acrylate copolymer having an acrylate content of 5% or above are blended with 30W90wt% said block copolymer to obtain the desired resin compsn. n COPYRIGHT: (C)1984,JPO&Japio |