Synthesis of branched polyethylene fluids for use in lubricant c

Details Synthesis of branched polyethylene fluids for use in lubricant c Synthesis of branched polyethylene fluids for use in lubricant c

1999-03-19

2000-05-16

Howard, Jacqueline V.

Chemistry of hydrocarbon compounds

Compound or reaction product mixture

Polymer of indefinite molecular weight

585 10, 585512, 585522, 585523, 585530, 508591, 526144, 526352, C10M10704, C07F 922

Patent

active

060639733

ABSTRACT:
The novel synthetic polyethylene fluids of the present invention are characterized by high viscosity indices (about 94-151 VI), low pour points (about -60 to -10.degree. C.), and a kinematic viscosity of about 6 to 28 cSt KV at 100.degree. C. The product compositions comprise polymers having a molecular weight of from about 300 to about 30,000 and a branching index of 151 to 586 branches per 1000 CH.sub.2 groups, or BI=0.18-0.40. A process for preparing such novel synthetic polyethylene fluids comprises polymerizing ethylene in the presence of a catalyst system, said catalyst system comprising [A] and [B], wherein [A] is a catalyst having the formula MX.sub.5 and [B] is a co-catalyst having the formula R.sub.n AlX.sub.3-n where M is a Group VB, VIB, or VIII transition metal; X is a halogen anion; R is a C.sub.1 -C.sub.20 alkyl group; and n is 1-2.

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