Metallocene catalyst system, useful for the production of polyolefins, comprises an organoboron or organoaluminum compound covalently bonded to a support.

摘要

A novel catalyst system comprises a metallocene, a Lewis base, a support and an organo-boron or organo-aluminum compound. The catalyst is covalently bonded to the support. A catalyst system contains: (A) a metallocene, (B) a Lewis base of formula (1), (C) a support and (D) an organo-boron or organo-aluminum compound formed from units of formula (2). The catalyst is covalently bonded to the support. M1R3R4R5 (1) ((R5)-X-M2(R8)-X-(R7))k (2) R3, R4, R5 = H, 1-20C alkyl, optionally halogenated, 6-40C aryl, optionally halogenated, 7-40 arylalkyl or alkylaryl, or two or three of R3-R5 may combine with each other; M1 = a Group V element, preferably nitrogen or phosphorus; R6, R7, R8 = H, halogen, a boron-free 1-40C hydrocarbon, preferably 1-20C alkyl, optionally halogenated, 1-10C alkoxy, 6-20C aryl, optionally halogenated, 6-20C aryloxy, 7-40C arylalkyl or alkylaryl, optionally halogenated or SiR93; R9 = a boron-free 1-40C hydrocarbon, preferably 1-20C alkyl, optionally halogenated, 1-10C alkoxy or 6-20C aryl, optionally halogenated, X = a Group IV, V or VIa element or -NH; M2 = a Group IIIa element; and k = 1-100. An Independent claim is also included for a process for the production of a polyolefin by polymerization of at least one olefin in the presence of the catalyst system.