C14-carboxylate polymer and viscosity index improver...

C - Chemistry – Metallurgy – 10 – M

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C10M 145/08 (2006.01) C10M 157/00 (2006.01)

Patent

CA 2008938

A lubricating oil composition exhibiting improved low temperature flow properties and viscometric properties comprising lubricating oil and (i) an amount effective to improve the low temperature flow properties of said lubricating oil composition of additive consisting essentially of at least one low molecular weight polymer or interpolymer of unsaturated carboxy ester represented by the formula (see fig.I) wherein R' is selected from the group consisting of hydrogen and COOR, and R is a C14 alkyl group; and (ii) an amount effective to improve the viscosity index of said lubricating oil composition of additive comprising hydrocarbon polymeric viscosity index improver.

Divulgation d'une composition d'huile lubrifiante présentant des propriétés de fluidité à basse température et de viscosité améliorées, comprenant une huile lubrifiante et i) une quantité suffisante, pour améliorer les propriétés de fluidité à basse température de cette composition d'huile lubrifiante, d'additif constitué principalement d'au moins un polymère de faible poids moléculaire ou d'un interpolymère d'ester d'acide carboxylique insaturé, représenté par la formule (voir figure I), dans laquelle R' est choisi parmi le groupe constitué de l'atome d'hydrogène et du groupement COOR, et R est un groupement alkyle en C14; et ii) une quantité suffisante, pour améliorer l'indice de viscosité de cette composition d'huile lubrifiante, d'additif comprenant un améliorant d'indice de viscosité polymère hydrocarboné.

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