| 摘要 |
PROBLEM TO BE SOLVED: To modify a polyblend of a polycarbonate resin and a styrene resin to obtain a thermoplastic resin compsn. improved in flowability and impact strength. SOLUTION: 100 pts.wt. polyblend comprising 50-95 wt.% polycarbonate resin (1) and 50-5 wt.% styrene resin (2) is compounded with 0.1-20 pts.wt. compatibilizer (3) and, if necessary, with a polyalkylene arylate resin (4) and a polyphenylene ether resin (5) to obtain the objective compsn. Ingredient (2) includes a rubbermodified polystyrene resin. The domain 2 of ingredient (2) dispersed in the matrix 1 of ingredient (1) is surrounded by ingredient (3). Ingredient (3) is a block copolymer (C) comprising a polystyrene block (A) and polybutadiene blocks (B) present at the molecular ends, and the double bonds of the polybutadiene blocks have been epoxidized. The addition of an organophosphorus compd. (6) as a flame retardant and a fluororesin (7) as an auxiliary flame retardant to the above-obtd. compsn. gives a nonhalogen flame-retardant thermoplastic resin compsn. |
