| abstract |
PURPOSE:To provide a flame-retardant rubber compsn., by blending an org. flame retarder, a polyfunctional compd., an org. compd. contg. imide or acid anhydride moiety, an inorg. powder and an org. peroxide with an ethylene-propylene copolymer rubber in a specified ratio. CONSTITUTION:0.1pts.wt. at least one member selected from an org. flame retarder (B) (e.g. decarbromodiphenyl ether) and a polyfunctional compd. (C) (e.g. divinylbenzene, allyl methacrylate), at least 0.1pts.wt. org. compd. (D) contg. imide or acid anhydride moiety of the formula [wherein Z is O, S; A is a cyclic structure (having 1-20atm), X is N; Y is H, halogen, an org. group having not more than 30 carbon atoms ; or X-Y may be 0] (e.g. N,N'-m-phenylenebismaleimide), 10- 200pts.wt. inorg. powder (E) (e.g. Sb2O3 or clay), and 0.3-20pts.wt. org. peroxide (F), are blended with 100pts.wt. ethylene-propylene copolymer rubber (A). |