C - Chemistry – Metallurgy – 10 – M
Patent
C - Chemistry, Metallurgy
10
M
C10M 115/08 (2006.01) C10M 169/06 (2006.01)
Patent
CA 2509235
A urea grease composition comprising a lubricating base oil and from 2 to 30 wt.% of a thickening agent, with respect to the total weight of the urea grease composition and wherein said thickening agent is selected from: (1) a mixture of a compound (a) and a compound (b), containing compound (a) at 20 to 80 mol %, relative to the total amount of compound (a) and compound (b); (2) a mixture formed by mixing with a compound (c) with a mixture (1); or (3) a compound (c) alone, wherein the compounds are represented by the general formulae (a) R1NHCONHR2NHCONHR1; (b) R3NHCONHR2NHCONHR3; and (c) R1NHCONHR2NHCONHR3, and wherein R2 is a diphenylmethane group, R1 is a C6-10 saturated alkyl group and R3 is a C14-40 saturated and/or unsaturated alkyl group wherein unsaturated alkyl groups constitute at least 20 mol % of the R3 alkyl group.
L'invention porte sur une composition de graisse d'urée comprenant une huile de base lubrifiante et de 2 à 30 % en poids d'un agent épaississant par rapport au poids total de la composition de graisse d'urée, cet agent épaississant étant sélectionné à partir de: (1) un mélange d'un composé (a) et d'un composé (b), contenant 20 à 80 % en mole du composé (a) par rapport à la quantité totale du composé (a) et du composé (b); (2) un mélange obtenu en mélangeant un composé (c) avec le mélange (1); ou (3) un composé (c) seul, les composés étant représentés par les formules générales (a) R¿1?NHCONHR¿2?NHCONHR¿1?; (b) R¿3?NHCONHR¿2?NHCONHR¿3?; et (c) R¿1?NHCONHR¿2?NHCONHR¿3?, et dans lesquelles R¿2? est un groupe diphénylméthane, R¿1? est un groupe alkyle saturé C6-10 et R¿3? est un groupe alkyle saturé et/ou insaturé C14-40, les groupes alkyle insaturés constituant au moins 20 % en mole du groupe alkyle R¿3?.
Numazawa Kouichi
Ohmura Kazushige
Ozaki Takahiro
Tanaka Keiji
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
Shell Internationale Research Maatschappij B.v.
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