Lubricant compositions

C - Chemistry – Metallurgy – 10 – M

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C10M 173/02 (2006.01) C10M 133/46 (2006.01)

Patent

CA 2180326

A high pH concentrate which upon dilution with water forms a lubricant composition for use in lubricating conveyor track, said concentrate having a pH of 7 to 11 comprising the following components: (a) (i) an alkylamine dicarboxylate compound of general formula (I), wherein R1 is a C8 to C18 saturated or unsaturated alkyl group, including mixtures of such alkyl groups, n is an integer of from 1 to 12, preferably n is 2, and each of M1 and M2, which may be the same or different, independently represents hydrogen or a Group I metal, typically sodium or potassium, and with the proviso that the distribution of alkyl chain lengths of the group R1 is such that components (a) and (b) remain in solution; and/or (ii) a compound of general formula (II), wherein R1 is a C8 to C18 alkyl group as defined above, R2 represents hydrogen or -(CH2)m -OH wherein m is an integer of from 2 to 12, and each of Y1 and Y2 which may be the same or different, is independently selected from - CH2 OH, -COOOM3O and -CH2COOOM3O, wherein M3 is hydrogen or a Group I metal, typically sodium or potassium; (b) a cyclic imidazoline of general formula (III), wherein R3 is a C7 to C20 saturated or unsaturated alkyl group; and (c) a C12 to C18 saturated or unsaturated alkyl sulphonate anionic surfactant, and (d) optionally, a pH reducing agent to provide said pH in the range of 7 to 11.

Concentré à pH élevé (entre 7 et 11) qui, dilué dans l'eau, forme une composition lubrifiante pour train de convoyeurs et dont la composition est la suivante: (a) (i) composé de bicarbonate d'alkylamine de formule générale (I) dans laquelle R¿1? est un groupe alkyle C¿8? à C¿18? saturé ou insaturé, y compris mélanges de ces groupes alkyle, n est un entier compris entre 1 et 12 (de préférence 2) et chacun des M1 et M2 qui peuvent être identiques ou différents représente hydrogène ou un métal du groupe I (sodium ou potassium p. ex.) sous réserve que la distribution des longueurs des chaînes alkyles du groupe R1 soit telle que les composants (a) et (b) restent en solution; et /ou (ii) est un composé de formule générale (II) dans laquelle R¿1? est un groupe alkyle C¿8? à C¿18? tel que défini ci-dessus, R¿2? représente hydrogène ou -(CH2)¿m? -OH où m est un entier compris entre 2 et 12, et chacun des Y¿1? et Y¿2? qui peuvent être identiques ou différents est choisi indépendamment entre -CH¿2? OH, -COO?O¿M¿3??O¿, où M¿3? est hydrogène ou un métal du groupe I (sodium ou potassium p. ex.); (b) une imidazoline cyclique de formule (III) dans laquelle R¿3? est un groupe alkyle C¿7? à C¿20?; saturé ou insaturé et (c) un surfactant anionique (sulphonate d'alkyle C¿12? à C¿18? saturé ou insaturé) et (d) facultativement un agent réducteur de pH confinant le pH entre 7 et 11.

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