| 摘要 |
1495956 Flame-retardant polycarbonate compositions GENERAL ELECTRIC CO 16 Dec 1974 [28 Dec 1973] 54245/74 Heading C3R A flame-retardant composition comprises a polycarbonate and an alkali metal or alkaline earth metal salt of an aromatic sulphonic acid which contains a sulphide group bonded to an aromatic ring and the sulphur atom may be present as a hetero atom in a ring. The salt may be present in an amount of from 0À01 to 10% by weight based on the polycarbonate. Many salts are specified, e.g. sodium 4,4<SP>1</SP>-dichlorodiphenylsulphide - 3 - sulphonate and sodium 2-nitrothianthrene-5-sulphonate. |
