Liquid lubricants from alpha-olefin and styrene copolymers

Details Liquid lubricants from alpha-olefin and styrene copolymers Liquid lubricants from alpha-olefin and styrene copolymers

C - Chemistry, Metallurgy

10

M

253/108

C10M 107/12 (2006.01)

Patent

CA 2038947

2038947 9103532 PCTABS00003 Alpha-olefins such as 1-decene are copolymerized with vinylaromatic monomers, especially styrene or the alkylstyrenes, to produce liquid lubricant oligomers having a broad range of viscosities, high viscosity index (VI), improved thermal stability and additive solubility characteristics. The lubricant oligomers are random copolymers containing recurring units of 1-alkene and vinyl aromatic monomer in mole ratios between 2:1 and 500:1, but preferably between 5:1 and 100:1 and more preferably from about 10:1 to 50:1. The recurring 1-alkene units of the copolymer have a branch ratio of less than 0.19, indicative of a poly 1-alkene segment of the copolymer chain or backbone that is essentially linear. The copolymerization catalyst is a reduced Group VIB metal catalyst on porous support, preferably reduced chromium oxide on a silica support.

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