Abstract: Extreme pressure lubricants, concentrates and greases. Disclosed herein are extreme pressure metal working lubricants which comprise a lubricant base material and a reaction product of (1) an amine containing from 1 to about 30 carbon atoms and (2) sulfamic acid or derivative thereof containing from 1 to about 30 carbon atoms. The reaction product or extreme pressure additive may be either water soluble or oil soluble. Amines containing from 1 to about 7 carbon atoms are generally used for making water soluble reaction products, and amines containing 8 or more (up to about 30) carbon atoms are generally used for making oil soluble reaction products. Water based lubricants comprise water and a water soluble reaction product. Oil based lubricants comprise an oil of lubricating viscosity and an oil soluble reaction product. Reaction products may be either addition products or sulfonamides.
Type:
Grant
Filed:
January 28, 1999
Date of Patent:
March 20, 2001
Assignee:
Dover Chemical Corp.
Inventors:
James G. MacNeil, Barbara A. Wade, C. Joseph Fette
Abstract: The invention pertains to chlorine-free extreme pressure metalworking fluid additives and lies in the recognition of the improved hydrolytic stability of alkanoic acid esters of cyclohexane dimethanol and other esters embodying similar structures. The various derivatives which are effective as extreme pressure additives include those which fall within the generic description ##STR1## wherein R.sup.1 through R.sup.4 are independently selected from the group hydrogen and C.sub.1-24 hydrocarbyl groups and R.sup.5 and R.sup.6 are independently selected from the group C.sub.3-24 hydrocarbyl groups.
Type:
Grant
Filed:
February 26, 1998
Date of Patent:
August 17, 1999
Assignee:
Dover Chemical Corp.
Inventors:
James MacNeil, Donald R. Stevenson, Barbara A. Wade, Joseph C. Fette
Abstract: The invention pertains to chlorine-free extreme pressure metalworking fluid additives and lies in the recognition of the improved hydrolytic stability of alkanoic acid esters of cyclohexane dimethanol and other esters embodying similar structures. The various derivatives which are effective as extreme pressure additives include those which fall within the generic description ##STR1## wherein R.sup.1 through R.sup.4 are independently selected from the group hydrogen and C.sub.1-24 hydrocarbyl groups and R.sup.5 and R.sup.6 are independently selected from the group C.sub.3-24 hydrocarbyl groups.
Type:
Grant
Filed:
July 21, 1997
Date of Patent:
July 14, 1998
Assignee:
Dover Chemical Corp.
Inventors:
James MacNeil, Donald R. Stevenson, Barbara A. Wade, Joseph C. Fette
Abstract: A class of hydrolytically stable bis(aralkylphenyl)pentaerythritol diphosphites is disclosed, which is suitable as an antioxidant additives in polyolefins, particularly, in polypropylene. The diphosphites are of low volatility, have a high thermal decomposition temperature and resist yellowing when blended into a polyolefin base. A preferred diphosphite is bis(2,4-dicumylphenyl)pentaerythritol diphosphite.
Type:
Grant
Filed:
August 30, 1993
Date of Patent:
November 15, 1994
Assignee:
Dover Chemical Corp.
Inventors:
Donald R. Stevenson, Duong N. Nguyen, Arthur W. McRowe