Showing papers on "Triphenyl phosphate published in 1964"

Synthetic resin compositions

Abstract: Flame retardant synthetic resin compositions comprise a copolymer of vinyl bromide with an ethylenically unsaturated aromatic monomer and a tertiary amine or a compound containing phosphorus, antimony, silicon or boron. Specified aromatic monomers are styrene and a -methyl styrene. The vinyl bromide and aromatic monomer may be copolymerized with minor proportions of other monomers, e.g. butadiene, isoprene, vinyl acetate or acrylonitrile. The monomers may be copolymerized in bulk, in solution, or in aqueous emulsion or suspension, optionally in the presence of a volatile hydrocarbon blowing agent, e.g. pentane, to give a foamable product. Specified amines are tri-n-butylamine, N,N-diethyldodecylamine, N,N-dimethylaniline, N-ethyl pyridine and N-vinyl pyrrolidone. Specified phosphorus compounds are tri-n-hexyl phosphine, triphenyl phosphine, trioctylphosphite, bis(2-ethylhexyl)-2-ethyl hexyl phosphonate, trimethyl phosphate, triphenyl phosphate, tricresyl phosphate, 2,3-dibromopropyl phosphate and sodium hydrophosphite. Specified antimony compounds are antimony trioxide, triphenyl stibine and antimony hexyleneglycoxide. Specified silicon compounds are tetraethyl orthosilicate, tetraphenyl orthosilicate, phenyl triphenoxy silane, and triphenoxy-o-tolyloxysilane. Specified boron compounds are triphenyl borane and butylphenoxy di(butyloxy) borane. The additives may be incorporated by dry mixing, mixing with a solution of the copolymer, or by adding to the polymerization system. Examples describe (1) the copolymerization of vinyl bromide and styrene in the presence of benzoyl peroxide, and the addition of triphenyl phosphine to a benzene solution of the copolymer which is used for casting films; (2) the incorporation in a vinyl bromide-styrene copolymer of N-vinyl pyrrolidone, trimethyl phosphate, triphenyl phosphate, tetraphenyl orthosilicate, antimony hexyleneglycoxide and butylphenoxy di(butyloxy)borane; and (3) the copolymerization of vinyl bromide and styrene in the presence of benzoyl peroxide and antimony hexyleneglycoxide.

Siloxane/phosphate resin bonded asbestos laminates

Abstract: The preparation of two resins by the condensation of p.xylylene dichloride with octapheqylcyclotetrasiloxane and triphenyl phosphate is described. These resins were blended and used to make asbestos laminates. The siloxane/phosphate laminates were compared with a conventional siloxane/asbestos material and found to have superior strength at room temperature and at temperatures up to 400oC. The thermal stability of the siloxane/phosphate material was below that of the conventional siloxane/asbestos. Infrared spectroscopy shows that the methylene bridges in the resin are oxidised to carbonyl groups during ageing at high temperatures.