Ashless or low-ash synthetic base compositions and additives...

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

C - Chemistry, Metallurgy

10

M

C10M 143/02 (2006.01) C10M 133/16 (2006.01) C10M 137/00 (2006.01) C10M 163/00 (2006.01) C10M 169/04 (2006.01)

Patent

CA 2051551

Case EI-6217 ASHLESS OR LOW-ASH SYNTHETIC BASE COMPOSITIONS AND ADDITIVES THEREFOR Abstract of the Disclosure An ashless or low-ash olcaginous liquid composition comprising a major amount of hydrogenated poly-.alpha.-olefin oligomer fluid having a viscosity in the range of 2 to 10 mm2?s-1 at 100°C, and minor amounts of at least the following: A) hydrogenated poly-.alpha.-olefin oligomer fluid having a viscosity in the range of 40 to 120 mm2?s-1 at 100°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 charaeteristics and excellent shear stability. To this end, the preferred compositions are devoid orsubstantially devoid of conventional polymeric high molecular weight viscosity index improvers.

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