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US 4,908,146 AGranted
Oil additive compositions exhibiting reduced haze containing polymeric viscosity index improver
AssigneeExxon Chemical Patents Inc.
InventorMarvin F. Smith, Jr.
Life of this patent
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Abstract
Oil compositions comprising a lubricating oil and oil-soluble hydrocarbon polymeric viscosity index improvers such as ethylene-propylene copolymers are substantially haze-free when said compositions contain an anti-hazing effective amount of a hydrocarbyl substituted succinic acid. The invention also relates to the process for preparing said compositions.
Claims39
A process of reducing haze in a composition comprising
- (i) lubricating oil;
- (ii) at least a viscosity index improving amount of viscosity index improver comprising a hydrocarbon polymer;
- and
- (iii) a haze forming amount of an oil insoluble haze forming material resulting from the manufacture or finishing processes of said hydrocarbon polymer;
- which process comprises adding to said composition a hazereducing effective amount of at least one hydrocarbyl substituted succinic acid.
2 more elements
A composition comprising:
- (i) lubricating oil;
- (ii) viscosity index improver comprising a hydrocarbon polymer;
- (iii) haze forming amount of an oil insoluble haze forming material resulting from the manufacture or finishing processes of said hydrocarbon polymer;
- and
- (iv) a haze reducing effective amount of hydrocarbyl substituted succinic acid.
2 more elements
Dependencies are inferred from the claim text.