| 摘要 |
PROBLEM TO BE SOLVED: To obtain a flame-retardant resin composition which has a high flame retardancy and is excellent in mechanical properties and heat resistance by compounding a styrene resin with specified amounts of an inorganic filler and red phosphorus. SOLUTION: A styrene resin in an amount of 100 pts.wt. is compounded with 1-50 pts.wt. inorganic filler and 0.1-20 pts.wt. red phosphorus. An AS resin and a modified AS resin are especially preferable as the styrene resin. The modified AS resin is a copolymer of an aromatic vinyl monomer, (meth) acrylonitrile, and another vinyl monomer. Glass fibers and a glass powder are preferable as the inorganic filler. Red phosphorus used here is preferably one prepared by coating unground red phosphorus with aluminum hydroxide and then with a phenolic thermosetting resin and, when subjected to extraction in hot water, preferably has an electrical conductivity of 0.1-1,000μS/cm. Preferably, the composition further contains at least one resin selected from phenolic resins and phenoxy resins.
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