公开(公告)号：US5034365A

公开(公告)日：1991-07-23

申请号：US521302

申请日：1990-05-09

申请人： Buehler: Charles K. ,  Albert P. Masino

发明人： Buehler: Charles K. ,  Albert P. Masino

IPC分类号： C08F4/658 ,  C08F4/60 ,  C08F4/642 ,  C08F4/651 ,  C08F4/654 ,  C08F4/656 ,  C08F10/00

CPC分类号： C08F10/00

摘要： A new catalyst useful in the polymerization of at least one olefin is disclosed. The catalyst comprises the product obtained by contacting silica, in random order, with (1) at least one hydrocarbon soluble magnesium-containing compound; and (2) a first modifying compound selected from the group consisting of silicon halides, boron halides, aluminum halides and mixtures thereof followed by a second modifying compound selected from the group consisting of halides having the structural formula SiH.sub.r X.sup.2.sub.s, where X.sup.2 is halogen; r is an integer of 1 to 3; and s is an integer of 1 to 3 with the proviso that the sum of r and s is 4, a hydrogen halide and mixtures thereof. The product of this step is contacted with a first titanium-containing compound having the structural formula Ti(OR).sub.m X.sub.n, where R is hydrocarbyl or cresyl; X is halogen; m is an integer of 1 to 4; and n is 0 or an integer of 1 to 3, with the proviso that the sum of m and n is 4. Finally, the product of this latter step is, in turn, contacted with a second titanium-containing compound, different from the first titanium-containing compound, having the structural formula TiX.sup.1.sub.p (OR).sup.1).sub.q, where X.sup.1 is halogen; R.sup.1 is hydrocarbyl; p is an integer of 1 to 4; and q is 0 or an integer of 1 to 3, with the proviso that the sum of p and q is 4.A catalyst system comprising the above catalyst, an aluminum-containing first cocatalyst and at least one silane second cocatalyst is also set forth.Finally, a process for polymerizing at least one olefin utilizing the catalyst system of this disclosure is taught.

摘要翻译： 公开了一种可用于至少一种烯烃聚合的新型催化剂。 催化剂包括通过使二氧化硅以随机顺序与（1）至少一种可溶于烃的含镁化合物接触而获得的产物; 和（2）选自卤化硅，卤化硼，卤化铝及其混合物的第一改性化合物，然后是选自具有结构式SiHrX 2的卤化物的第二改性化合物，其中X 2是卤素; r为1〜3的整数， s为1〜3的整数，条件是r和s的和为4，卤化氢及其混合物。 该步骤的产物与具有结构式Ti（OR）m X n的第一含钛化合物接触，其中R是烃基或甲酚基; X是卤素; m为1〜4的整数。 并且n为0或1至3的整数，条件是m和n的和为4.最后，后一步骤的产物又与第二含钛化合物接触，第二含钛化合物与 具有结构式TiX1p（OR）1）q的第一含钛化合物，其中X1是卤素; R1是烃基; p为1〜4的整数， 并且q为0或1至3的整数，条件是p和q之和为4.还列出了包含上述催化剂，含铝的第一助催化剂和至少一种硅烷第二助催化剂的催化剂体系 。 最后，教导了利用本公开的催化剂体系聚合至少一种烯烃的方法。