| abstract |
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 -CH¿2COO?OM3O, wherein M¿3? 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. |