申请人:SUMITOMO CHEMICAL COMPANY, LIMITED
公开号:EP0346098A2
公开(公告)日:1989-12-13
Ethylene (35-60 mols) and a C3-10 a-olefin (65-40 mols) are copolymerized at a temperature of 40 to 80°C with a catalyst of (a) an oxyvanadium compound, (b) an organoaluminium compound and (c) a halogenated hydrocarbon ester, e.g. a perchlorocrotonic acid ester, in a mol ratio of (b) to (a) of ≧ 2.5 and of (c) to (a) of ≧ 1.5, in a hydrocarbon solvent.
The polymer has a molar ratio of ethylene: a-olefin of 88:12 - 98:2, a number average mol. wt. of 35,000 - 80,000 and a ratio of wt. number average mol wt. of 1.8:1 - 3.0:1 determined by GPC. It has good transparency and is moldable to a film which is heat-sealable at low temperature.
乙烯(35-60 摩尔)和 C3-10 a-烯烃(65-40 摩尔)在 40 至 80℃的温度下与(a)氧钒化合物、(b)有机铝化合物和(c)卤代烃酯(如全氯酸酯)催化剂共聚,(b)与(a)的摩尔比≧ 2.5,(c)与(a)的摩尔比≧ 1.5。(b)与(a)的摩尔比≧2.5,(c)与(a)的摩尔比≧1.5。
经 GPC 测定,该聚合物的乙烯:a-烯烃摩尔比为 88:12 - 98:2,平均摩尔重量为 35,000 - 80,000,重量比为 1.8:1 - 3.0:1。它具有良好的透明度,可模塑成薄膜,并可在低温下热封。