Ester-free synthetic lubricating oils

Details Ester-free synthetic lubricating oils Ester-free synthetic lubricating oils

C - Chemistry, Metallurgy

10

M

C10M 169/04 (2006.01) C10M 105/02 (2006.01) C10M 107/02 (2006.01) C10M 129/95 (2006.01)

Patent

CA 2199297

Synthetic lubricating oils for use in lubricating internal combustion engines, having good compatibility with elastomeric seals and good stability, but without making use of organic acid ester basestocks, comprise a synthetic basestock such as polyalphaolefin oligomers, an additive package comprising a hydrocarbyl substituted dicarboxylic acid or anhydride in which the hydrocarbyl group has a number average molecular weight (Mn) of from 700 to 5000 and a viscosity modifier.

Les huiles lubrifiantes synthétiques décrites sont utiles pour lubrifier des moteurs à combustion interne, ont une bonne compatibilité avec les garnitures élastomères et une bonne stabilité mais ne contiennent pas de bases aux esters d'acides organiques. Ces huiles lubrifiantes synthétiques contiennent une base synthétique du type des oligomères de polyalphaoléfine, un ensemble d'additifs dont un acide ou un anhydride dicarboxylique à substitution hydrocarbylique dans lequel le groupe hydrocarbyle a un poids moléculaire moyen en nomnbre (<o>M</o>n) compris entre 700 et 5000, et un modificateur de la viscosité.

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