| 摘要 |
A process for producing an olefin polymer or copolymer which comprises polymerizing or copolymerizing olefins or copolymerizing an olefin with up to 5 mole% of a diolefin in the presence of a catalyst comprising a titanium catalyst component containing magnesium, titanium, halogen and an electron donor, an organoaluminum catalyst component and a third catalyst component, characterized in that said catalyst is composed of (A) a titanium catalyst component containing magnesium, titanium, halogen and an electron donor essential ingredients, said electron donor being elected from the group consisting of (a) esters of polyfunctional compounds selected from polycarboxylic acids having 5 to 36 carbon atoms, polyhydroxy compounds having 6 to 28 carbon atoms and hydroxy-substituted carboxylic acids having 10 to 28 carbon atoms, (b) monocarboxylic acid esters of the formula RCOOR min in which each of R and R min represents a hydrocarbyl group having 1 to 20 carbon atoms at least one of them represents a branched-chain group, an alicyclic group, or an aryl ring-containing linear group and (c) carbonic acid esters having 3 to 18 carbon atoms, (B) an organoaluminium compound, and (C) an ester of phosphorous acid with an alcohol having 2 to 4 carbon atoms; and a catalyst composition used therefor. f |
