| 摘要 |
<p>1400693 Elastomers B F GOODRICH CO 15 Feb 1973 [16 Feb 1972] 7414/73 Heading C3P Elastomers comprise (A) at least 50% of CH 2 = CHCOOR where R is C 2-18 alkyl, C 2-10 alkoxyalkyl, or C 2-20 cyanoalkyl, (B) 0À5 to 20% of vinyl benzyl chloride having the formula and (C) up to 30% of vinyl monomer. The polymers are preferably prepared by emulsion polymerization using emulsifying agents, e.g. alkyl phenoxypolyethyleneoxy ethyl phosphate, sodium salt of a naphthalene/formaldehyde condensation product and sodium and ferric salts of ethylene diamine tetraacetic acid, with for example paramethane hydroperoxide as initiator. In examples copolymers of vinyl benzyl chloride with one or more of ethyl acrylate, n-butyl acrylate and methoxyethyl acrylate are prepared. The products may be vulcanized using polyamines and sulphur/fatty acid soap systems.</p> |
