Compositions – Electrolytes for electrical devices
Patent
1988-08-01
1993-06-15
Howard, Jacqueline V.
Compositions
Electrolytes for electrical devices
252 515R, C10M15916
Patent
active
052194809
ABSTRACT:
The present invention is directed to oil-soluble lubricating oil viscosity index improver/dispersant additives comprising Mannich Base condensates of a grafted ethylene copolymer, an optionally alkyl-substituted N-hydroxyaryl compound, an aldehyde, and a monosecondary amine, whereby oil solutions, particularly oil concentrates, of said additives which are characterized by minimal viscosity change over an extended period of time. These additives comprise a copolymer of ethylene with one or more C.sub.3 to C.sub.28 alpha-olefins, preferably propylene, which have been grafted with acid moieties, e.g. maleic anhydride, preferably using a free radical initiator in a solvent such as a lubricating oil, which is then either (a) reacted with an N-hydroxyaryl amine and then condensed with an aldehyde and a monosecondary amine to form the Mannich Base viscosity index improver/dispersant material, or (b) reacted with a preformed Mannich Base condensate of an N-hydroxyaryl amine, aldehyde and the monosecondary amine. The invention also relates to process for preparing the preceding products and their use in oil compositions.
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Bloch Ricardo
Gutierrez Antonio
Kleist Robert A.
Alter M. E.
Exxon Chemical Patents Inc.
Howard Jacqueline V.
Murray J. B.
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