Diene interpolymers with halogenated monomers

Claim 1

An elastomeric interpolymer prepared by the method which comprises aqueous emulsion polymerizing, at a temperature in the range of about 40° C. to 60° C., in the presence of a free radical generating catalyst selected from at least one of bis-azo isobutyronitrile, postassium persulfate, ammonium persulfate, benzoyl peroxide, p-methane hydroperoxide and cumene hydroperoxide and in the presence of an alkali metal salt of an organic sulfonic acid emulsifier, a monomer mixture comprised of (A) about 45 to about 70 weight percent dienes selected from at least one of 1,3-butadiene and isoprene, (B) about 15 to about 40 weight percent of at least one comonomer selected from pentachlorophenyl methacrylate, 2,4,6-tribromophenyl methacrylate, 2,3,4,6-tetrachorophenyl acrylate, 2,4,6-trichlorophenyl acrylate, pentabromophenyl acrylate, 2,4,6-tribromophenyl acrylate, 2,4-dimbromophenyl acrylate, pentachlorophenyl methacrylate, 2,3,4,6-tetrachlorophenyl methacrylate, 2,4,6-trichlorophenyl methacrylate, pentabromophenyl methacrylate, 2,4-dibromophenyl methacrylate, pentachlorothiophenyl acrylate, pentachlorothiophenyl methacrylate, N-2,4,6-tribromophenyl acrylamide and N-2,4,6-tribromophenyl methacrylamide, and (C) about 5 to about 20 weight percent of a termonomer selected from at least one of (1) styrene, α-methyl styrene, acrylonitrile and α-methacrylonitrile, or (2) alkyl esters selected from at least one of ethyl acrylate, butyl acrylate, 2-ethyl hexyl acrylate and methyl methacrylate; where said elastomeric interpolymer has a glass transition temperature in the range of about -40° C. to about -66° C.