| 摘要 |
1,213,749. Bulk polymerization of vinyl Chloride. PRODUITS CHIMIQUES PECHINEY - SAINT - GOBAIN. 22 Oct., 1968 [24 Oct., 1967; 25 April, 1968,], No.50028/68. Heading C3P. Vinyl chloride is polymerized in bulk or a precipitating medium in the presence of a diacyl peroxide and a mineral acid salt of titanium in a valency which will reduce the peroxide at a temperature of -20‹ to + 50‹ C. in the case of an aliphatic diacyl peroxide and - 15‹ to + 65‹ C. with an aromatic diacyl peroxide. The preferred titanium compound is titanium trichloride. |
