| 摘要 |
1416060 Butadiene polymerization catalysts GOODYEAR TIRE & RUBBER CO. 28 Sept 1973 [27 Oct 1972] 45484/73 Heading C3P Butadiene optionally in admixture with other diolefins, is polymerized to a polymer having a high proportion of cis-1,4-butadiene units by polymerization using a catalyst which comprises (1) at least one organoaluminium compound of the formula AlR 1 R 2 R 3 in which R 1 is alkyl, cycloalkyl, aryl, aralkyl, alkaryl, alkoxy, H or F, and R 2 and R 3 are alkyl, cycloalkyl, aryl, alkaryl or aralkyl ; (2) at least one nickel compound selected from nickel carboxylates, #- allyl complexes of nickel, Ni(CO) 4 , and other complexed or uncomplexed compounds of nickel, and (3) at least one fluorine compound selected from HF, BF 3 and complexes of either or both of these with ketones, ethers, esters, alcohols, nitriles and water, said catalyst being preformed by mixing components (1) to (3) prior to contact with the monomer(s) to be polymerized, with a polymeric catalyst stabilizer which is a polymer selected from homopolymers of hydrocarbon conjugated diolefins, copolymers of mixtures thereof, and copolymers thereof with styrene or its methyl substituted derivatives, the catalyst being prepared in such manner that the stabilizer is added before reaction occurs between the organo-aluminium compound and the nickel and fluorine compounds. In the examples, the catalyst comprises triethyl aluminium/nickel octoate/boron trifluoride etherate together with stabilizers selected from poly-cis-1,4-butadiene, styrene/ butadiene copolymer, various polybutadienes having mixed cis-1,4, trans-1,4 and 1,2 configurations, and cis-1,4-polyisoprene. |
