Patent ID: 9718898
Date: 2017-08-01
CPC Classifications: C08F

Claim:
1. A homogeneous polymerization catalyst system for polymerization or copolymerization of at least one alpha olefin prepared by contacting: a. a coordination complex (B) selected from the group consisting of: a ferrocenium tetraphenylborate, dimethylferrocenium tetrakis(pentafluorophenyl)borate, ferrocenium tetrakis(pentafluorophenyl)borate, decamethylferrocenium tetrakis(pentafluorophenyl)borate, acetylferrocenium tetrakis(pentafluorophenyl)borate, formylferrocenium tetrakis(pentafluorophenyl)borate, cyanoferrocenium tetrakis(pentafluorophenyl)borate, silver tetraphenylborate, silver tetrakis(pentafluorophenyl)borate, trityl tetraphenylborate, trityl tetrakis(pentafluorophenyl)borate, and silver tetrafluoroborate, trimethylaluminum, triethylaluminum, triisopropylaluminum, triisobutylaluminum, dimethylaluminum chloride, diethylaluminum chloride, methylaluminum dichloride, ethylaluminum dichloride, dimethylaluminum fluoride, diisobutylaluminum hydride, diethylaluminum hydride, and ethylaluminum sesquichloride; b. an alkyl aluminum (C) in hexane or heptane; and c. at least one dry metallocene (A), wherein the molar ratio of the metallocene to the coordination complex is from 1:1.5 to 1:3 and the molar ratio of the metallocene to the alkyl aluminum, is from 1:15 to 1:500, wherein the metallocene is an unbridged or a bridged metallocene complex; and wherein the metallocene is capable of forming an ion pair with the coordination complex, and wherein the amount of the coordination complex is 1 mol to 3.0 mol, based on 1 mol of the metallocene, and the amount of hexane or heptane is 100 parts by mass to 100,000 parts by mass, based on 1 part by mass of the coordination complex for producing a polyalpha-olefin with a kinematic viscosity at 100 degrees Celsius ranging from 1 cSt to 1000 cSt.