Ashless or low-ash synthetic base compositions and additives the

Details Ashless or low-ash synthetic base compositions and additives the Ashless or low-ash synthetic base compositions and additives the

1990-10-10

1992-02-18

Hearn, Brian E.

Compositions

Electrolytes for electrical devices

585 12, 252 515A, C10M13344

Patent

active

050891561

ABSTRACT:
An ashless or low-ash oleaginous liquid composition comprising a major amount of hydrogenated poly-.alpha.-olefin oligomer fluid having a viscosity in the range of about 2 to about 10 cSt at 100.degree.C., and minor amounts of at least the following: A) hydrogenated poly-.alpha.-olefin oligomer fluid having a viscosity in the range of about 40 to about 120 cSt at 100.degree.C.; and B) antiwear/extreme pressure agent selected from phosphorus-containing ashless dispersant, boron-containing ashless dispersant, and phosphorus- and boron-containing ashless dispersant. Compositions of this type can be formed having excellent high and low temperature viscosity characteristics and excellent shear stability. To this end, the preferred compositions are devoid or substantially devoid of conventional polymeric high molecular weight viscosity index improvers.

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