| 摘要 |
1,225,843. Three - component catalyst containing polyhalogen compound. KANEGAFUCHI KAGAKU KOGYO K.K. 18 Oct., 1968 [30 Dec., 1967; 9 April, 1968], No. 49517/68. Heading C3P. Unsaturated monomers are polymerized in the presence of a catalyst comprising (a) a salt of a Group IA or II metal, (b) an organoaluminium compound, and (c) a gem-polyhalogen organic compound having at least one carbon atom with at least two halogen atom substituents. A wide variety of monomers may be employed under otherwise conventional polymerization conditions. In examples, ethylene, isobutyl vinyl ether, acrylonitrile, vinyl acetate, ethylene - vinyl acetate, styrene, and methyl methacrylate are polymerized in tetrahydrofuran, ether or hexane as solvent and in the presence of (a) ZnCl 2 , MgCl 2 , CdCl 2 , ZnI 2 , LiCl, NaCl KCl, ZnCl 2 + MgCl 2 , NaCl + KCl, and KC1 + ZnC1 2 , (b) A1(C 2 H 5 ) 3 , and (c) CC1 4 and CCl 3 .COOC 2 H 5 . |
