Friction modifiers
AssigneeCentury Oils, Inc.
InventorKelvin S. Chiddick
Life of this patent
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Abstract
Friction modifiers are composition which modify the coefficient of friction between surfaces to which the friction modifier is applied. They are similar in nature to lubricants but have different characteristics in certain respects. The invention relates particularly to solid friction modifiers which may be rigid or flexible. These friction modifiers comprise 20-80% by weight of a polymer medium, 5-20% by weight of a solid lubricant and 15-60% by weight of a friction enhancer. The composition produces a coefficient of friction which rises to above 0.20 at creepage level up to 2.5% between steel bodies in rolling-sliding contact lubricated using the composition.
Claims21
A high positive friction modifier composition comprising:
- (a) at least 20% by weight of a polymer resin media;
- (b) at least 5% by weight of a solid lubricant
- (c) at least 15% by weight of a friction enhancer.
- wherein there is produced a coefficient of friction which increases to about 0.20 at creepage levels up to 2.5% between steel bodies in rolling-sliding contact lubricated using the said composition.
The composition according to claim 7, wherein the solid lubricant and the friction enhancer are present in a ratio of about 1:2 to 1:3.
A high and positive friction modifier composition comprising:
- (a) about 60% by weight of a polyester resin media;
- (b) about 10% by weight of molybdenum disulphide solid lubricant;
- and
- (c) about 30% by weight of powderized talc (magnesium silicate) such that the resulting coefficient of friction of the said composition ranges from about 0.45 to about 0.55 as creepage levels increase from about 2.5% to about 30% between steel bodies in rolling-sliding contact lubricated using the said composition.
Dependencies are inferred from the claim text.