申请人:MITSUBISHI PETROCHEMICAL CO., LTD.
公开号:EP0261961A2
公开(公告)日:1988-03-30
A catalyst for olefin polymerization which comprises a combination of:
Component which is a solid catalyst component A obtained by contacting a component (i) which is a solid component comprising titanium, magnesium and halogen as essential elements with a component (ii), which is a silicon compound represented by formula: R¹R²3-n Si(OR³)n where R¹ stands for a branched hydrocarbon residue, R² stands for a hydrocarbon residue which is the same as or different from R¹ and n stands for a number satisfying an equation: 1≦n≦3;
Component B which is an organoaluminum compound; and
Component C which is a compound represented by a formula M(OR⁴)xR⁵yXz in which M stands for an element selected from the group consisting of B, Al, C, Si, Sn, P, S, Cl, Br, I, Fe, Ti, V, Zr, Mg, Ca and Zn, R⁴ and R⁵ each stand for a hydrocarbon residue having 1 to 20 carbon atoms which are the same as or different from each other and X stands for halogen atom, each of x, y and z is a number which is equal to zero or is equal to or less than the valency of the element M and the sum of x, y and z is equal to the valency of the element M.
一种用于烯烃聚合的催化剂,由以下组分组合而成:
一种固体催化剂组分 A,由组分(i)与组分(ii)接触而得,组分(ii)为硅化合物,其基本元素为钛、镁和卤素:R¹R²3-n Si(OR³)n 其中 R¹ 代表支链烃残基,R² 代表与 R¹ 相同或不同的烃残基,n 代表满足等式的数字:1≦n≦3;
成分 B 是一种有机铝化合物;以及
成分 C 是由式 M(OR⁴)xR⁵yXz 代表的化合物,其中 M 代表选自 B、Al、C、Si、Sn、P、S、Cl、Br、I、Fe、Ti、V、Zr、Mg、Ca 和 Zn 组成的组中的元素、R⁴和 R⁵各自代表具有 1 至 20 个碳原子的烃残基,它们彼此相同或不同,X 代表卤素原子,x、y 和 z 中的每一个都是等于零或等于或小于元素 M 的化合价的数字,且 x、y 和 z 的总和等于元素 M 的化合价。