DEVELOPMENT OF FIRE RETARDANT ELASTOMERS
Technical Report,01 Jun 1959,31 Mar 1960
BORDEN CO PHILADELPHIA PA PHILADELPHIA United States
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The major effort of research under this contract was devoted to the emulsion copolymerization of elastomeric monomers isoprene, chloroprene, acrylates, with flame-retardant olefinic compounds such as bis2-chloroethyl vinylphosphonate CVP, diallyl allylphosphonate DAAP, diallyl chloromethylphosphonate DACP, diallyl phenylphosphate hexachlorobutadiene HCBD, and phenyl allyl allylphosphonate PAAP. Other monomers such as acrylonitrile and vinylidene chloride were also incorporated into several compositions. Copolymers of elastomeric monomers with diallyl chloromethylphosphonate or with vinylidene chloride were self-extinguishing Q.M. number of 4. The incorporation of a low molecular weight polymer of CVP into an Acrylon Rubber by milling also produced a self extinguishing elastomer. The other flame-retardants listed, did not produce permanently nonflammable copolymers. In several cases, no true copolymers were produced. For example, attempts to copolymerize HCBD with a number of monomers led to polymeric products from which the HCBD could be extracted. The self-extinguishing characteristics of Neoprene were not improved by milling low molecular weight CVP into it.