Titanium trichloride catalyst and process for production of alpha-olefin polymers
申请人:SUMITOMO CHEMICAL COMPANY, LIMITED
公开号:EP0034935A1
公开(公告)日:1981-09-02
A component of a catalyst (for polymerizing olefins) is prepared by reacting a mixture of (1) a titanium trichloride hydrocarbon aluminum halide dialkyl ether composition, (2) a halogen, interhalogen compound or halgenated hydrocarbon and (3) a dialkyl ether, as in known from U.K. Patent No. 1,559,447; to increase activity of the catalyst and stereoregu- lanty of the polymer, the mixture also includes (4) an electron donor, namely an organic compound containing a N, O, Si, S and /or P atom, e.g. an amine, imine, nitrile, ether, ketone, ester, sulfide, silane, siloxane, phosphine, phosphite or phosphate, in an amount of 10-6 to 0.02 mols per gram of titanium trichloride composition (1).
The reaction may be in an inert hydrocarbon solvent at 0° to 150°C for 5 minutes to 6 hours, after which the solid is isolated and washed.
The catalyst also includes a known hydrocarbon aluminum halide or hydride as activator and may include a further stereoregularity improving agent.
Olefins having 2 to 10 carbon atoms are homo- or copolymerized at0°to 100°C to form stereoregular polyolefin using the catalyst in a small amount, e.g. 50 mg per 1.4 Kg of propylene.
一种催化剂(用于聚合烯烃)的组分是通过以下物质的混合物反应制备的:(1)三氯化 钛烃卤化铝二烷基醚组合物;(2)卤素、卤间化合物或卤代烃;(3)二烷基醚,如英国专利 No.为了提高催化剂的活性和聚合物的立体性,混合物中还包括 (4) 电子供体,即含有 N、O、Si、S 和/或 P 原子的有机化合物,如胺、亚胺、腈、醚、酮、酯、硫化物、硅烷、硅氧烷、磷化氢、亚磷酸盐或磷酸盐,其用量为每克三氯化钛组合物 (1) 10-6 至 0.02 摩尔。
反应可在 0° 至 150°C 的惰性烃类溶剂中进行 5 分钟至 6 小时,然后分离和洗涤固体。
催化剂还包括作为活化剂的已知烃类卤化铝或氢化物,并可包括另一种立体规整度改进剂。
具有 2 至 10 个碳原子的烯烃在 0° 至 100°C 的温度下进行均聚或共聚,形成立体规整的聚烯烃,催化剂的用量很小,例如每 1.4 千克丙烯用 50 毫克。