C - Chemistry – Metallurgy – 10 – M
Patent
C - Chemistry, Metallurgy
10
M
C10M 157/10 (2006.01) C10M 143/00 (2006.01) C10M 143/06 (2006.01) C10M 143/10 (2006.01) C10M 145/14 (2006.01) C10M 171/02 (2006.01)
Patent
CA 2489908
A power transmission fluid composition having improved characteristics. The fluid may comprise a base oil and an additive composition including a viscosity index improving amount of a polyisoalkylene component having a molecular weight ranging from about 300 to about 3000 weight average molecular weight as determined by gel permeation chromatography. The power transmission fluid exhibits a kinematic viscosity (KV at 100°C) of less than about 9 centistokes and a Brookfield viscosity (BV at -40°C) of less than about 30,000 centipoise. Also the friction versus velocity curve for the fluid has a more positive slope at high speeds compared to similar fluids in the absence of the polyisoalkylene component.
Ozbalik Nubar
Tersigni Samuel H.
Afton Chemical Corporation
Macrae & Co.
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