Patent ID: 9718897
Date: 2017-08-01
CPC Classifications: C08F

Claim:
1. A solution process for the polymerization or copolymerization of at least one alpha olefin comprising: a. adding a coordination complex (B) selected from the group consisting of triethylammonium tetraphenylborate, tri(n-butyl)ammonium tetraphenylborate, trimethylammonium tetraphenylborate, triethylammonium tetrakis(pentafluorophenyl)borate, tri(n-butyl)ammonium tetrakis(pentafluorophenyl)borate, triethylammonium hexafluoroarsenate, pyridinium tetrakis(pentafluorophenyl)borate, pyrrolinium tetrakis(pentafluorophenyl)borate, N,N-dimethylanilinium tetrakis(pentafluorophenyl)borate, and methyldiphenylammonium tetrakis(pentafluorophenyl)borate and 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 to an alkyl aluminum (C) in hexane or heptane (D) to form a mixture; b. stirring the mixture continuously forming a homogeneous solution in an inert anhydrous environment; c. adding at least one dry metallocene (A) to the homogenous solution of the coordination complex and alkyl aluminum (C) forming a metallocene catalyst solution, wherein the mole ratio of the metallocene to the coordination complex is from 1:1.5 to 1:3 and the mole ratio of the metallocene to the alkyl aluminum is from 1:15 to 1:500 to form a homogenous metallocene enriched catalyst solution; and d. polymerizing an alpha olefin with the homogenous metallocene enriched catalyst solution and optionally adding additional alkyl aluminum as a moisture scavenger or an impurities scavenger to yield a polyalpha-olefin with a molecular weight from 250 to 20,000 and a kinematic viscosity at 100 degrees Celsius ranging from 1 cSt to 1000 cSt wherein the metallocene is capable of forming an ion pair with coordination complex (B), and wherein the amounts of coordination complex (B) and alkyl aluminum (C) are 1 mol to 3.0 mol and 15.0 mol to 500 mol, respectively, based on 1 mol of metallocene (A), and the amount of hexane or heptane (D) is 100 parts by mass to 100,000 parts by mass, based on 1 part by mass of the coordination complex.