Silicone resin bonded dry film lubricants
AssigneeROLLS-ROYCE plc
InventorsSubhash K. Naik, James M. Klotz, Michael J. Barber
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Abstract
Dry film lubricant coatings are provided by using a silicone resin binder, either as an aqueous emulsion or in a solvent-based system, to fix an alkaline earth metal fluoride to a substrate. The compositions used to apply the coatings may also include relatively minor amounts of xylene, ammonium benzoate, a wetting agent, and/or a porosity-inducing agent—although none of those additives remains in the cured coating. Multi-layer dry film lubricant coatings are also disclosed, with the multi-layer coating having a basecoat layer as described above, and a topcoat layer made of a layer-lattice solid such as graphite or molybdenum disulfide, and a silicone resin, aluminum phosphate or an alkali metal silicate binder.
Claims47
An aqueous coating composition for providing a dry film lubricant coating to a substrate, said composition comprising:
- (a) 10-70% by weight alkaline earth metal fluoride;
- (b) 2-65% by weight of an alkyl silicone resin emulsion in water;
- and
- (c) water.
A composition of matter comprising a dry film lubricant coating fixed to a substrate, wherein said dry film lubricant coating comprises an alkaline earth metal flouride and an alkyl silicone resin emulsion in water.
A multi-layer, dry film lubricant coating, comprising:
- (a) a basecoat layer comprising an alkaline earth metal flouride and an alkyl silicone resin emulsion in water;
- and
- (b) a topcoat layer comprising a layer-lattice solid and an alkyl silicone resin emulsion in water.
A composition of matter comprising a multi-layer, dry film lubricant coating fixed to a substrate, wherein said multi-layer, dry film lubricant coating comprises:
- (a) a basecoat layer comprising an alkaline earth metal fluoride and an alkyl silicone resin emulsion in water;
- and
- (b) a topcoat layer comprising a layer-lattice solid and an alkyl silicone resin emulsion in water.
A method of providing a multi-layer, dry film lubricant coating to a substrate, said method comprising:
- (a) applying a basecoat layer comprising 10-70% by upright an alkaline earth metal fluoride;
- 2-65% by upright of an alkyl silicone resin emulsion in water (c) water to a substrate;
- and drying and curing the said coating to fix the coating on the said substrate;
- and
- (b) subsequently applying a topcoat layer comprising a layer-lattice solid and an alkyl silicone resin emulsion in water to said substrate.
Dependencies are inferred from the claim text.