Acrylic block copolymer low temperature flow modifiers in lubricating oils
AssigneeArkema Inc.
InventorsScott Schmidt, Peter Callais, Noah Macy
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Abstract
The present invention relates to acrylic block copolymers synthesized by a controlled free-radical process, and their use as low temperature flow modifiers in oil-based compositions. They are especially useful in modifying the low temperature flow behavior in lubricating oils. The acrylic copolymers are especially useful as pour point depressants in lubricating oil.
Claims26
An oil composition comprising
- a) from 99.999 to 30 weight percent of one or more oils;
- and
- b) from 0.001 to 70 weight percent of a controlled free-radical acrylic block copolymer having at least one acrylic block.
An oil viscosity modifier comprising a controlled free-radical acrylic block copolymer having at least one acrylic block.
A method of decreasing the viscosity of an oil composition at low temperatures comprising adding to an oil composition from 0.001 to 70 weight percent of a controlled free-radical acrylic block copolymer having at least one acrylic block.
A method of decreasing the pour point temperature of an oil comprising adding to an oil composition from 0.001 to 70 weight percent of a controlled free-radical acrylic block copolymer having at least one acrylic block.
Dependencies are inferred from the claim text.