Polyester viscosity index improver

Details Polyester viscosity index improver Polyester viscosity index improver

C - Chemistry, Metallurgy

08

G

253/109, 402/213

C08G 63/20 (2006.01) C10M 129/82 (2006.01) C10M 145/22 (2006.01) C10M 169/04 (2006.01)

Patent

CA 1337316

The invention provides a polyester based on dimeric fatty acid, a glycol without hydrogen atoms at an alpha carbon atom in which a C3 - C15 monoalcohol chainstopper is present and which contains approximately equivalent quantities of acid and alcohol groups. Preferably the dimer acid contains 36 carbon atoms and the monoalcohol is a branched chain C6 - C10 alkanol. The invention also provides lubricant compositions comprising 30 - 2% (w.w.) of the polyester and 70 - 98% (w.w.) of an synthetic lubricant base.

593789

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