The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 30, 1993
Filed:
Jan. 06, 1992
Rolf Schumacher, Marly, CH;
Ciba-Geigy Corporation, Ardsley, NY (US);
Abstract
Lubricant compositions free of barium salt are described, which comprise A) a lubricant, B) at least one compound of the formula I ##STR1## in which R.sub.1 and R.sub.2, independently of one another are C.sub.1 -C.sub.20 alkyl, C.sub.3 -C.sub.18 alkenyl, phenyl, phenyl substituted by C.sub.1 -C.sub.20 alkyl, phenyl-C.sub.1 -C.sub.4 alkyl, C.sub.2 -C.sub.12 hydroxyalkyl, C.sub.5 -C.sub.12 cycloalkyl, C.sub.5 -C.sub.12 cycloalkyl substituted by C.sub.1 -C.sub.4 alkyl, or naphthyl and Y represents O or S, and C) at least one compound of the formula II, III, or IV ##STR2## in which n is a number from 1 to 4, R.sub.3 is hydrogen, oxyl, hydroxyl, C.sub.1 -C.sub.12 alkyl, C.sub.3 -C.sub.8 alkenyl, C.sub.3 -C.sub.8 alkynyl, phenyl-C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.18 alkoxy, C.sub.5 -C.sub.8 cycloalkoxy, C.sub.7 -C.sub.9 phenylalkoxy, C.sub.2 -C.sub.8 alkanoyl, C.sub.3 -C.sub.5 alkenoyl, C.sub.2 -C.sub.18 alkanoyloxy, benzyloxy, glycidyl or a group --CH.sub.2 CH(OH)--Z in which Z is hydrogen, methyl or phenyl, and, if n is 1 R.sub.4 is hydrogen, C.sub.1 -C.sub.18 alkyl or C.sub.2 -C.sub.18 alkyl which is interrupted by one or more oxygen atoms, C.sub.3 -C.sub.8 alkenyl, cyanoethyl, benzyl, glycidyl, a monovalent radical of an aliphatic or cycloaliphatic, araliphatic or aromatic carboxyylic acid, carbamic acid or phosphorus-containing acid or a monovalent silyl radical, if n is 2 R.sub.4 is C.sub.1 -C.sub.12 alkylene, C.sub.4 -C.sub.12 alkenylene, 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 R.sub.4 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, R.sub.4 is a tetravalent radical of an aliphatic, cycloaliphatic or aromatic tetracarboxylic acid, and R.sub.8 is C.sub.1 -C.sub.18 alkyl or a polyisobutylene radical, and R.sub.9 is C.sub.1 -C.sub.8 alkyl. The compositions serve to improve the use properties of the corresponding lubricant and have in particular good resistance to oxidation at high temperatures.