Friction control compositions
AssigneeKelsan Technologies Corp.
InventorsJohn Cotter, Donald T. Eadie, Kelvin Spencer Chiddick
Life of this patent
Estimating the term…
Abstract
According to the invention there is provided a liquid friction control composition characterized as either having a high and positive friction characteristic or a low and neutral friction characteristic, comprising a retentivity agent. The liquid friction control composition may also comprise other components such as a solid lubricant, a wetting agent, a consistency modifier, and a preservative. The liquid friction control compositions may be used to modify the interfacial friction characteristics in sliding and rolling-sliding contact such as steel wheel-rail systems including mass transit and freight systems.
Claims91
A liquid friction control composition comprising:
- (a) from about 40 to about 95 weight percent water;
- (b) from about 0.5 to about 50 weight percent rheological control agent;
- (c) from about 0.5 to about 40 weight percent retentivity agent;
- (d) from 0 to about 40 weight percent lubricant;
- and
- (e) from 0 to about 25 weight percent friction modifier,
- wherein, if said lubricant is 0 weight percent, then said composition comprises at least about 0.5 weight percent friction modifier, wherein if said friction modifier is 0 weight percent, then said composition comprises at least about 1 weight percent lubricant, and
- wherein said retentivity agent is selected from the group consisting of an acrylic compound;
- a polyvinyl compound selected from the group consisting of polyvinyl alcohol, polyvinyl chloride, and a mixture thereof;
- an oxazoline compound;
- an epoxy compound;
- an alkyd compound;
- a modified alkyd compound;
- a urethane acrylic compound;
- an acrylic latex;
- an acrylic epoxy hybrid;
- a polyurethane dispersion;
- a styrene acrylate;
- a gum;
- a resin;
- and a mixture thereof.
A method of controlling noise between two steel surfaces in sliding-rolling contact, comprising applying a liquid friction control composition to at least one of said two steel surfaces, said composition comprising:
- (a) from about 40 to about 95 weight percent water;
- (b) from about 0.5 to about 50 weight percent rheological control agent;
- (c) from about 0.5 to about 40 weight percent retentivity agent;
- (d) from 0 to about 40 weight percent lubricant;
- and
- (e) from 0 to about 25 weight percent friction modifier;
- wherein, if said lubricant is 0 weight percent, then said composition comprises at least about 0.5 weight percent friction modifier, and wherein if said friction modifier is 0 weight percent, then said composition comprises at least about 1 weight percent lubricant.
A method of reducing lateral forces between two steel surfaces in sliding-rolling contact, comprising applying a liquid friction control composition to at least one of said two steel surfaces, said composition comprising:
- (a) from about 40 to about 95 weight percent water;
- (b) from about 0.5 to about 50 weight percent rheological control agent;
- (c) from about 0.5 to about 40 weight percent retentivity agent;
- (d) from 0 to about 40 weight percent lubricant;
- and
- (e) from 0 to about 25 weight percent friction modifier;
- wherein, if said lubricant is 0 weight percent, then said composition comprises at least about 0.5 weight percent friction modifier, and wherein if said friction modifier is 0 weight percent, then said composition comprises at least about 1 weight percent lubricant.
A method of reducing drawbar pull between two or more train cars, comprising applying a liquid friction control composition to a surface of one or more wheels of said two or more train cars, or the rail surface over which said two or more train cars travel, said composition comprising:
- (a) from about 40 to about 95 weight percent water;
- (b) from about 0.5 to about 50 weight percent rheological control agent;
- (c) from about 0.5 to about 40 weight percent retentivity agent;
- (d) from 0 to about 40 weight percent lubricant;
- and
- (e) from 0 to about 25 weight percent friction modifier;
- wherein, if said lubricant is 0 weight percent, then said composition comprises at least about 0.5 weight percent friction modifier, and wherein if said friction modifier is 0 weight percent, then said composition comprises at least about 1 weight percent lubricant.
A liquid friction control composition comprising:
- (a) from about 40 to about 95 weight percent water;
- (b) from about 0.5 to about 50 weight percent rheological control agent;
- (c) from about 0.5 to about 40 weight percent retentivity agent;
- (d) from 0 to about 40 weight percent lubricant;
- and
- (e) from 0 to about 25 weight percent friction modifier,
- wherein, if said lubricant is 0 weight percent, then said composition comprises at least about 0.5 weight percent friction modifier, wherein if said friction modifier is 0 weight percent, then said composition comprises at least about 1 weight percent lubricant, and
- wherein said retentivity agent is selected from the group consisting of an oxazoline compound;
- an epoxy compound;
- and a mixture thereof.
A liquid friction control composition comprising:
- (a) from about 40 to about 80 weight percent water;
- (b) from about 0.5 to about 30 weight percent rheological control agent;
- (c) from about 2 to about 20 weight percent friction modifier;
- and
- (d) from about 0.5 to about 40 weight percent retentivity agent;
- wherein the composition does not include a lubricant.
Dependencies are inferred from the claim text.