Abstract: A corrosion inhibiting lubricating composition comprises:(a) a synthetic ester base stock;(b) at least one aromatic amine antioxidant;(c) a neutral organic phosphate of the formula (R.sup.1 O).sub.3 PO where R.sup.1 is a tolyl, phenyl, xylyl, alkyl or cycloalkyl group, the alkyl or cycloalkyl group having up to 10 carbon atoms;(d) a saturated or unsaturated dicarboxylic acid of the general formula ##STR1## wherein x+y+z is an integer in the range from 2 to 22 inclusive and where at least one of the groups R.sub.1 to R.sub.5 is a carboxylic acid group; or a dicarboxylic acid of one of the three formulae ##STR2## (e) a straight or branched chain saturated or unsaturated monocarboxylic acid which is optionally sulphurised or an ester of such an acid; and(f) a triazole of the formula: ##STR3## or a triazole selected from 1,2,4 triazole, 1,2,3 triazole, 5-anilo-1,2,3,4-thiatriazole, 3-amino-1,2,4 triazole, 1-H-benzotriazole-1-yl-methylisocyanide, methylene-bis-benzotriazole and naphthotriazole.
Type:
Grant
Filed:
May 9, 1994
Date of Patent:
October 28, 1997
Assignee:
Castrol Limited
Inventors:
John William Anthony Pragnell, Andrew Jonathan Markson, Mark Anthony Edwards
Abstract: There are disclosed novel water-soluble metal working fluids comprising polyaspartic acid and salts thereof useful as a lubricant in process to cut, bend, grind and shape both ferrous and non-ferrous metal. The polyaspartic acid and salts thereof are particularly advantageous in that the fluids can be easily disposed of after use without special treatment because polyaspartic acid and salts thereof are readily biodegradable.
Type:
Grant
Filed:
April 1, 1996
Date of Patent:
April 1, 1997
Assignee:
Monsanto Company
Inventors:
Dennis J. Kalota, Skippy H. Ramsey, Larry A. Spickard
Abstract: Soapless lubricant compositions, especially for use in the food and beverage industry, comprising an amphoteric compound, a tertiary amine and/or a salt thereof, and a nonionic surfactant which is one or more of an alkyl dimethylamine oxide or an alkyl oligoglycoside.
Type:
Grant
Filed:
November 9, 1994
Date of Patent:
October 15, 1996
Assignee:
Henkel Kommanditgesellschaft auf Aktien
Inventors:
Alfred Laufenberg, Birgit Winkelmann, Werner Strothoff