Olefin polymerization catalyst and olefin polymerization process

Abstract

Abstract A catalyst for polymerization of olefin is provided which comprises (A) a metallocene compound, (B) an organoaluminum compound, and (C) a metal borate or a metal aluminate. The metallocene compound (A) is represented by the general formula (1) below: where Cp 1 and Cp 2 are independently a substituted or unsubstituted cyclopentadienyl group; R 1 is an alkylene group, an arylalkylene group, dialkylsilylene group, dialkylgermanylene group, an alkylphosphinediyl group, or an alkylimino group having 1 to 20 carbons, R 1 crosslinking Cp 1 and Cp 2 together; m is 0 or 1; M is titanium, zirconium, or hafnium; and R 2 and R 3 are independently hydrogen, halogen, or a hydrocarbon group, an alkoxy group, or an aryloxy group having 1 to 12 carbons, the organic aluminum compound (B) is represented by the general formula (2) below: where each R 4 is independently hydrogen, an alkyl group, an alkoxy group, or an aryl group, at least one R 4 being an alkyl group, and the metal borate or the metal aluminate (C) being represented by the general formula (3): where C is an alkali metal cation or an alkaline earth metal cation; L is a Lewis base; A is an anion having elemental boron or elemental aluminum; n is an integer of from 0 to 6; b and d are respectively an integer selected to balance the electric charge. A process of polymerization of olefin is also provided wherein olefin is polymerized in the presence of the above catalyst. With the catalyst and the olefin polymerization process of the present invention, the complicated synthesis steps are eliminated, and polyolefin having excellent properties and high moldability is produced efficiently.

Inventors

• 👤 Satoru Yamada
• 👤 Akihiro Yano

Bibliographic Details