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US 2023/0088019 A1Published application
Microencapsulation of friction modifier additives and other additives for preformance enhancement in automotive and industrial applications
AssigneeThe George Washington University
InventorStephen HSU
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Abstract
The present disclosure relates to microencapsulated friction modifiers additives used in lubricants or other solutions, to their preparation, and to the use thereof to improve fuel economy of the engines and machines by enhancing friction reduction and prolonging the friction reduction time period.
Claims23
A method for microencapsulating friction modifiers, comprising:
- (a) preparing an aqueous suspension of an emulsifier;
- (b) preparing a solution comprising (i) at least one friction modifier;
- (ii) a polymer;
- and (iii) an organic solvent;
- (c) emulsifying the solution of step (b) by adding the aqueous suspension of step (a) to the solution of step (b) and stirring;
- (d) heating the emulsified solution of step (c);
- (e) cooling the emulsified solution;
- (f) forming microcapsules by diluting the emulsified solution of step (e) with an organic solvent;
- and
- (g) isolating the microcapsules resulting from step (f).
7 more elements
(canceled)
A microcapsule comprising:
- (i) at least one friction modifier;
- and
- (ii) at least one polymer shell encapsulating the at least one friction modifier,
- wherein
- (i) the surface of the microcapsule is smooth,
- (ii) a size of the microcapsule is between about 1 μm and about 40 μm, and
- (iii) a thickness of the polymer shell is between about 0.1 μm and about 2 μm.
4 more elements
Dependencies are inferred from the claim text.