GB875735A - Processes for the preparation of catalysts for the polymerisation of olefinically unsaturated hydrocarbons and for the preparation of polyolefinic-hydrocarbons; and the resulting catalysts and polymers - Google Patents

Abstract

A polymerization catalyst is prepared by reacting together (a) one or more titanium tetrahalides with (b) one or more aluminium alkyl compounds which may contain halogen atoms and (or) alkoxy groups, the reaction mixture containing 1/2 -1\ba1/2 alkyl groups per molecule of titanium tetrahalide, to give a product which is then reacted with (c) one or more compounds in the molecular structure of which aluminium atoms are bound to alkyl groups and to a lesser number of alkoxy groups. The catalyst is used for the polymerization of olefinically unsaturated hydrocarbons, e.g. propylene or butadiene, and in particular the copolymerization of ethylene with propylene and the copolymerization of ethylene and/or propylene with higher a -olefins, e.g. butylene-1, or with conjugated dienes. In examples, catalyst components specified are: (a) TiCl4; (b) AlEt3, n-octyl-OAlEt2 or an admixture thereof; and (c) EtOAlEt2, or n-octyl-OAlEt2 (optionally plus AlEt3). Specifications 810,023 and 816,614 are referred to.ALSO:A polymerization catalyst is prepared by reacting together (a) one or more titanium tetrahalides with (b) one or more aluminium alkyl compounds which may contain halogen atoms and (or) alkoxy groups, the reaction mixture containing 1/2 -1\ba1/2 alkyl groups per molecule of titanium tetrahalide, to give a product which is then reacted with (c) one or more compounds in the molecular structure of which aluminium atoms are bound to alkyl groups and to a lesser number of alkoxy groups. The catalyst is used for the polymerization of olefinically unsaturated hydrocarbons, e.g. propylene or butadiene, and in particular the copolymerization of ethylene with propylene and the copolymerization of ethylene and/or propylene with higher a -olefins, e.g. butylene-1, or with conjugated dienes. In examples, catalyst components specified are:-(a) TiCl4; (b) AlEt3, n-octyl-OAlEt2 or an admixture thereof; and (c) EtOAlEt2, or n-octyl-OAlEt2 (optionally plus AlEt3). Specifications 810,023 and 816,614 are referred to.