Lubricating grease having a high water-resistance

C - Chemistry – Metallurgy – 10 – M

Patent

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Details

C10M 145/14 (2006.01) C10M 151/02 (2006.01) C10M 153/02 (2006.01)

Patent

CA 2558546

The invention relates to lubricating greases containing at least one thickening agent and at least one lubricating oil. The lubricating grease contains at least one polymeric structure improver that can be obtained by polymerizing monomer compositions comprised of: a) 0 to 40 % by weight, with regard to the weight of the monomer compositions for producing the polymer structure improvers, of at least one (meth)acrylate of formula (I), in which R represents hydrogen or methyl, R' represents a linear or branched alkyl radical with 1 to 5 carbon atoms; b) 40 to 99.99 % by weight, with regard to the weight of the monomer compositions for producing the polymeric structure improvers, of at least one (meth) acrylate of formula (II), in which R represents hydrogen or methyl and R2 represents a linear or branched alkyl radical with 6 to 30 carbon atoms; c) 0.01 to 20 % by weight, with regard to the weight of the monomer compositions for producing the polymeric structure improvers, of acid groups containing monomers or salts thereof, and; d) 0 to 59.99 % by weight, with regard to the weight of the monomer compositions for producing the polymeric structure improvers, of comonomers.

L'invention concerne une graisse lubrifiante contenant au moins un agent épaississant et au moins une huile lubrifiante. La graisse lubrifiante contient au moins un améliorant de structure polymérique qui est obtenu par polymérisation de compositions monomériques contenant a) 0 à 40 % en poids, par rapport au poids des compositions monomériques destinées à la production des améliorants de structure polymériques, d'au moins un (méth)acrylate de la formule (I) où R représente un hydrogène ou un méthyle ; R' représente un résidu alkyle linéaire ou ramifié ayant 1 à 5 atomes de carbone, b) 40 à 99,99 % en poids, par rapport au poids des compositions monomériques destinées à la production des améliorants de structure polymériques, d'au moins un (méth)acrylate de la formule (II) où R représente un hydrogène ou méthyle, R?2¿ représente un résidu alkyle linéaire ou ramifié ayant 6 à 30 atomes de carbone, c) 0,01 à 20 % en poids, par rapport au poids des compositions monomériques destinées à la production des améliorants de structure polymériques, de monomères contenant des groupes d'acide ou de leurs sels, d) 0 à 59,99 % en poids, par rapport au poids des compositions monomériques destinées à la production des améliorants de structure polymériques, de comonomères.

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