| 摘要 |
1,220,524. Halogen-containing fire-retardants for polymers. BORG-WARNER CORP. 25 July, 1968 [7 Aug., 1967], No. 35622/68. Headings C3G, C3P, C3Q and C3R. [Also in Division C2] Polymer compositions contain as a flame retardant additive compounds of the Formula I wherein X represents halogen, Y and Y<SP>1</SP> represent halogen, alkyl C 1-4 , alkoxy C 1-4 or halogen substituted alkyl C 1-4 or alkoxy C 1-4 and R represents hydrogen, alkyl C 1-4 or halogen. Suitable polymers include natural rubber, linear and cross-linked polybutadiene, polyethylene, polypropylene, butyl rubber, ethylenepropylene rubber and terpolymer, poly(cyclopentadiene), polystyrene and high impact polystyrene, acrylonitrile - butadiene - styrene graft polymer, polyamide, poly(styrene-acrylonitrile), acrylic rubber and polycarbonate. The preferred compound I is 6-(1<SP>1</SP>,4<SP>1</SP>,5<SP>1</SP>,6<SP>1</SP>,7<SP>1</SP>,7<SP>1</SP>- hexachloro - 5<SP>1</SP> - norbornen - 2<SP>1</SP> - yl) - 1,2,3,4,9,9- hexachloro - 1 ,4,4a,5,6,7, 8,8a - octahydro - 1,4- methanonaphthalene. Antimony compounds may also be present. |
