C - Chemistry – Metallurgy – 10 – M
Patent
C - Chemistry, Metallurgy
10
M
C10M 133/40 (2006.01) C10M 137/10 (2006.01) C10M 141/10 (2006.01) C10M 141/12 (2006.01)
Patent
CA 2058823
A-18490/A Lubricant compositions Abstract of the disclosure: Lubricant compositions free of barium salt are described, which comprise A) a lubricant, B) at least one compound of the formula I Image (I), in which R1 and R2, independently of one another, are ]C1-C20alkyl, C3-C18alkenyl, phenyl, phenyl substituted by C1-C20alkyl, phenyl-C1-C4alkyl, C2-C12hydroxyalkyl, C5-C12cycloalkyl, C5-C12cycloalkyl substituted by C1-C4alkyl, or naphthyl and Y represents O or S, and C) at least one compound of the formula II, III, or IV Image (II), Image (III), Image (IV) in which n is a number from 1 to 4, R3 is hydrogen, oxyl, hydroxyl, C1-C12alkyl,C3-C8alkenyl, C3-C8alkynyl, phenyl-C1-C4alkyl, C1-C18alkoxy, C5-C8cycloalkoxy, C7-C9phenylalkoxy, C2-C8alkanoyl, C3-C5alkenoyl, C2-C18alkanoyloxy, benzyloxy, glycidyl or a group -CH2CH(OH)-Z, in which Z is hydrogen, methyl or phenyl, and, if n is 1 R4 is hydrogen, C1-C18alkyl or C2-C18alkyl which is interrupted by one or more oxygen atoms, C3-C8alkenyl, cyanoethyl, benzyl, glycidyl, a monovalent radical of an aliphatic or cycloaliphatic, araliphatic or aromatic carboxylic acid, carbamic acid or phosphorus-containing acid or a monovalent silyl radical, if n is 2 R4 is C1-C12alkylene, C4-C12alkenylene, xylylene, a divalent radical of an aliphatic, cycloaliphatic, araliphatic or aromatic dicarboxylic acid, dicarbamic acid or a phosphorus-containing acid or a divalent silyl radical, if n is 3 R4 is a trivalent radical of an aliphatic, cycloaliphatic or aromatic tricarboxylic acid, an aromatic tricarbamic acid or a phosphorus-containing acid or a trivalent silyl radical, and, if n is 4, R4 is a tetravalent radical of an aliphatic, cycloaliphatic or aromatic tetracarboxylic acid, and R8 is C1-C18alkyl or a polyisobutylene radical, and R9 is C1-C8alkyl. The compositions serve to improve the use properties of the corresponding lubricant and have in particular good resistance to oxidation at high temperatures.
Schumacher Rolf
Ag Ciba-Geigy
Fetherstonhaugh & Co.
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