| 摘要 |
A liquid catalyst component (A) for use in the production of ethylene-.alpha.-olefin copolymers obtained by reacting: (a) a titanium compound represented by general formula (R1R2N~ 4-(m+n) TiX m Y n, wherein R1 and R2. same or different from each other, each represents a hydrocarbon group having 1 to 30 carbon atoms, X represents halogen, X represents an alkoxy group, m represents a number satisfying 1 ~ m ~ 3, and n represents a number satisfying 0 ~ n ~ 3, provided that (m+n) satisfies 1 ~ (m+n) ~ 3, with (b) at least one compound selected from the compounds represented by general formula wherein R3 and R4, same or different from each other, each represents a hydrocarbon group having 1 to 30 carbon atoms and/or an alkoxy group having 1 to 30 carbon atoms, or by reacting: (a) with (c) at least one compound selected from the group consisting of hydroxyaldehydes and ketoalcohols having both carbonyl group and hydroxyl group in their molecule represented by general formulas (I) to (VI): wherein R5 to R18 each represents a hydrocarbon group having 1 to 30 carbon atoms and/or hydrogen; E, F and G each represents a straight or branched hydrocarbon chain having 1 to 30 carbon atoms, provided that said hydro-carbon chain may optionally have an unsaturated bond; g, h, i and j each represents a number of 1 to 4; and k and ~ each represents a number of 0 to 2. This liquid catalyst component can be used as a component of a catalyst system in combination with an organoaluminum compound (B) for producing ethylene-.alpha.-olefin copolymers.
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