Thixotropic gel or liquid for friction control and method of using the same
AssigneeWhitmore Manufacturing, LLC
InventorsKelvin Chiddick, Alejandro Medrano, Randall Krinker, Kyle Wilson, David Birdwell
Life of this patent
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Abstract
A friction control composition having high and positive frictional properties for sliding steel surfaces includes a water insoluble hydrocarbon that enables a reduced water content, a rheological additive, a freezing point depressant, a friction modifier, and a lubricant.
Claims19
A method of modifying friction of a rail road track from negative to positive comprising:
- mixing a friction control composition by applying shear to thin the thickness or viscosity of the composition, the friction control composition comprising a thixotropic gel or liquid free of a skin forming retentivity agent, the thixotropic gel or liquid comprising a water insoluble component selected from the group consisting of isoparaffins, vegetable oils, bio-based triglycerides, fatty oils and synthetic esters;
- applying said thinned composition to the top of a rail;
- and
- causing said thinned composition on the top of the rail to settle to a static condition of increased viscosity sufficient to maintain the composition in position on the top of the rail as an undried composition for engagement by a train wheel with shear thinning and distribution of the composition along the rail to change the friction from negative to positive.
A thixotropic gel or liquid for friction control comprising between from about 10 to about 40 wt. % of a water insoluble component, between from about 9 to about 24 w/w % of a solid friction modifier, and between from about 4 to about 40 wt. % water.
A method of modifying the friction of a rail road track from negative to positive comprising:
- mixing a friction control composition by applying shear to thin the thickness or viscosity of the composition, the friction control composition comprising a thixotropic gel or liquid comprising between from about 10 to about 40 wt. % of a water insoluble component and between from about 4 to about 40 wt. % water;
- applying said thinned composition to the top of a rail;
- and
- causing said thinned composition on the top of the rail to settle to a static condition of increased viscosity sufficient to maintain the composition in position on the top of the rail as an undried composition for engagement by a train wheel with shear thinning and distribution of the composition along the rail to change the friction from negative to positive.
A method of modifying friction of a rail road track from negative to positive comprising:
- mixing a friction control composition by applying shear to thin the thickness or viscosity of the composition, the friction control composition comprising a thixotropic gel or liquid which comprises a water insoluble component selected from the group consisting of isoparaffins, vegetable oils, bio-based triglycerides, fatty oils and synthetic esters;
- applying said thinned composition to the top of a rail;
- and
- causing said thinned composition on the top of the rail to settle to a static condition of increased viscosity sufficient to maintain the composition in position on the top of the rail as an undried composition for engagement by a train wheel with shear thinning and distribution of the composition along the rail to change the friction from negative to positive.
A thixotropic gel or liquid for friction control free of a skin forming retentivity agent, the thixotropic gel or liquid comprising a water insoluble component selected from the group consisting of isoparaffins, vegetable oils, bio-based triglycerides, fatty oils, synthetic esters and between from about 9 to about 24 w/w % of a solid friction modifier.
A thixotropic gel or liquid for friction control comprising a water insoluble component selected from the group consisting of isoparaffins, vegetable oils, bio-based triglycerides, fatty oils, synthetic esters and between from about 9 to about 24 w/w % of a liquid or solid friction modifier.
Dependencies are inferred from the claim text.