A solid catalyst component for the polymerization of olefins and an olefin polymerization catalyst
申请人:TOHO TITANIUM CO. LTD.
公开号:EP0297163A1
公开(公告)日:1989-01-04
A solid catalyst component prepared by washing a solid substance, which has been obtained by reacting diethoxymagnesium (a) suspended in an alkylbenzene (b) with titanium tetracloride (c) in an amount less than l/2 of the alkylbenzene (b) in a ratio by volume and a phthalic diester (d) at a temperature within the range of 80-l35°C, with an alkylbenzene, and thereafter reacting the solid substance in a presence of an alkylbenzene (b) with titanium tetrachloride (c) in an amount less than l/2 of the alkylbenzene (b) in a ratio by volume as well as an olefin polymerization catalyst comprising
(A) the solid catalyst component specified above,
(B) a silicon compound of the general formula:
SiRm(OAlk)4-m
wherein R is a group selected from an alkyl group, a cycloalkyl group, an aryl group and vinyl group, Alk is an alkyl group and m is 0 or an integer of l-3, with the proviso that when R is an alkyl group, R may be identical with Alk and when m is l, 2 or 3, the R groups and/or the Alk groups may respectively be identical or different, and
(C) an organoaluminum compound.
This catalyst is capable of exhibiting a high polymerization activity combined with a high stereospecific performance and producing stereoregular olefin polymers in a high yield.
一种固体催化剂组分,其制备方法是:将悬浮于烷基苯(b)中的二乙氧基镁(a)与四氯化钛(c)(按体积比,其用量少于烷基苯(b)的 l/2)和邻苯二甲酸二酯(d)在 80-l35°C 范围内的温度下反应,然后将固体物质与烷基苯(b)和四氯化钛(c)(按体积比,其用量少于烷基苯(b)的 l/2)反应、与烷基苯反应,然后在有烷基苯(b)存在的情况下,使固体物质与四氯化钛(c)反应,四氯化钛(c)的用量按体积比少于烷基苯(b)的 l/2,以及烯烃聚合催化剂,烯烃聚合催化剂包括
(A) 上述固体催化剂组分、
(B) 通式如下的硅化合物
SiRm(OAlk)4-m
其中 R 是选自烷基、环烷基、芳基和乙烯基的基团,Alk 是烷基,m 是 0 或 l-3 的整数,但当 R 是烷基时,R 可与 Alk 相同,当 m 是 l、2 或 3 时,R 基团和/或 Alk 基团可分别相同或不同,以及
(C) 有机铝化合物。
这种催化剂能表现出较高的聚合活性和较高的立体特异性能,并能以较高的产率生产立体配位的烯烃聚合物。