THERMOPLASTIC MOULDING MASSES WITH FLAME-RETARDING PROPERTIES

摘要

A thermoplastic moulding compsn. contains (A) 20-85 pts. wt. of a thermoplastic aromatic polycarbonate, (B) 5-50 pts. of a graft polymer of (B1) 5-90 pts. of a mixt. of (B1.1) 50-95 pts. styrene, alpha-methylstyrene, nucleus-substd. styrene and/or methyl methacrylate, and (b1.2) 50-5 pts. (meth)acrylonitrile, methyl methacrylate, maleic anhydride and/or N-substd. maleinimide, on (B2) 95-10 pts. of a rubber with Tg not above 10 deg. C, (C) 5-70 pts. of a thermoplastic copolymer of (C1) 50-95 pts. styrene, alpha-mthylstyrene nucleus-substd. styrene and/or methyl methacrylate, and (C2) 50-5 pts. (meth)acrylonitrile, methyl methacrylate, maleic anhydride and/or N-substd. maleinimide, opt. (D) 3-15 pts. of a low- or high-mol. halogen (Br) cpd., w.r.t. 100 pts. A+B+C+D, with the halogen content of A)D being 3-10%, w.r.t. A+D, (E) 1-15 pts. of a cpd. of formula (I) and (F) 0.05-1 pts. PTFE with particle size 0.05-20 microns and density 1.2-1.9 g/cc, added as a coagulated mixt. of emulsions of PTFE and emulsions of 0.1-4 additional amts. of B. The amts. of E, F and additional B are w.r.t. 100 pts. of A+B+C+D. In (I), R1, R2, R3 = 1-8C ay.alkyl or 6-20C aryl, both opt. halogenated; n = 0 or 1.