| 摘要 |
1496680 Flame retardant polycarbonate compositions GENERAL ELECTRIC CO 16 Dec 1974 [28 Dec 1973] 54242/74 Heading C3R A fire retardant composition comprises a polycarbonate and an alkali metal or alkaline earth metal salt of a sulphonic acid containing a 5- or 6-membered heterocyclic ring wherein the hetero atom is nitrogen, oxygen or sulphur. The salt is preferably present in an amount of from 0À01 to 10% by weight based on the polycarbonate. Many salts are specified, e.g. sodium 2,5 - dichlorothiophane - 3 - sulphonate and sodium 2,6-dichloropyridine-3-sulphonate. |
