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US 9,944,878 B2Granted
Lubricant system clean-up compositions and methods thereof
AssigneeThe Lubrizol Corporation
InventorsBetsy J. Butke, Grenville Holt
Life of this patent
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Abstract
The present invention relates to a lubricant and/or clean-out composition comprising: (a) a dispersant component comprising a succinimide dispersant and/or a quaternary ammonium salt dispersant; (b) a carrier fluid component; and (c) an optional corrosion inhibitor, as well as methods of cleaning out deposits in a lubricant system, such as a hydraulic system, using such compositions.
Claims19
A clean-out composition comprising:
- (a) a dispersant component comprising (i) a succinimide dispersant and a quaternary ammonium salt dispersant;
- or (ii) a quaternary ammonium salt dispersant;
- (b) a carrier fluid component;
- and
- (c) an optional corrosion inhibitor;
- wherein said quaternary ammonium salt dispersant is prepared from:
- (a) the reaction product of (i) a hydrocarbyl-substituted acylating agent and (ii) a compound having an oxygen or nitrogen atom capable of condensing with said acylating agent and further having a tertiary amino group;
- and
- (b) a hydrocarbyl epoxide quaternizing agent suitable for converting the tertiary amino group to a quaternary nitrogen;
- and wherein said clean-out composition is free of a detergent component.
7 more elements
Dependencies are inferred from the claim text.