| 摘要 |
PURPOSE:To provide the titled composition having excellent flame-retardance, impact resistance and heat resistance, by compounding a styrene resin with a styrene-butadiene block copolymer, a halogenated polycarbonate oligomer, and an antimony compound. CONSTITUTION:100pts.wt. of a styrene resin is compounded with 1-15pts.wt. of a block copolymer of styrene and butadiene, 10-40pts.wt. of a halogenated polycarbonate oligomer, and 1-15pts. wt. of an antimony compound. The block copolymer is preferably the one having the weight ratio of styrene:butadiene of 10-50:90-50, a weight-average molecular weight of 60,000-200,000 and a structure of formula S(B-S)n (n is 1-3). The oligomer is obtained by the reaction of tetrabromobisphenol A and phosgene and has a polymerization degree of 3-7. The particle diameter of the antimony trioxide is 1-3mu. |
