| 摘要 |
1,237,578. #-Allyl initiators in ethylene polymerization. IMPERIAL CHEMICAL INDUSTRIES Ltd. 17 Nov., 1969 [16 Dec., 1968], No. 59704/68. Heading C3P. Ethylene is polymerized by contact with an initiator of the formula M(all) n X m , where M is a transition metal of Group IV, (all) is a #-allylic group, X is a halogen atom, n is 2 or 3, m is 1 or 2 and n + m is 4. Specified inhibitors are tris- (#-allyl) zirconium bromide, tris-(#-allyl) hafnium bromide, tris-(#-2-methallyl) zirconium chloride, tris-(#-allyl) zirconium chloride and bis-(#-allyl) zirconium dichloride or dibromide. |
