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US 11,180,654 B2Granted
Composition, film formed from the composition, sliding member having the film, and method for producing the same
AssigneeDuPont Toray Specialty Materials Kabushiki Kaisha
InventorsTakahiko Sasaki, Tetsuji Yamaguchi
Life of this patent
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Abstract
A film is formed by use of a composition containing (A) a binder resin, (B) a hard particle, and (C) a solid lubricant selected from the group containing molybdenum disulfide and graphite, wherein the composition contains tungsten carbide as the hard particle, and wherein weight ratio of (B) the hard particles and (C) the solid lubricant, (B)/(C), is in the range of 1 to 3.
Claims20
A composition, comprising:
- (A) a binder resin;
- (B) a hard particle comprising tungsten carbide having an average particle diameter of from 0.7 to 1.27 μm measured by laser diffraction scattering;
- and
- (C) a solid lubricant selected from the group consisting of molybdenum disulfide and graphite;
- wherein weight ratio of (B) the hard particles and (C) the solid lubricant, (B)/(C), is of from 1.46 to 2.47.
2 more elements
A method for forming a lubricating film on surface of a member, comprising the steps of:
- (I) preparing a composition comprising (A) a binder resin, (B) a hard particle comprising tungsten carbide having an average particle diameter of from 0.7 to 1.27 μm, and (C) a solid lubricant selected from the group consisting of molybdenum disulfide and graphite, wherein the composition comprises tungsten carbide as the hard particle, and wherein weight ratio of (B) the hard particles and (C) the solid lubricant, (B)/(C), is of from 1.46 to 2.47;
- (II) applying the composition on surface of a member;
- and
- (III) heat-curing the applied composition, thereby forming a lubricating film on surface of the member.
1 more element
A composition comprising:
- (A) a binder resin comprising a polyamideimide and an epoxy resin;
- (B) a hard particle that is:
- from 45 to 100 weight percent of tungsten carbide having an average particle diameter of from 0.7 to 1.27 μm measured by laser diffraction scattering, based on a total weight of the hard particle;
- from 0 to 55 weight percent of titanium nitride having an average particle diameter of 0.7 μm measured by laser diffraction scattering, based on a total weight of the hard particle;
- and
- from 0 to 21 weight percent of alumina having an average particle diameter of 0.4 μm measured by laser diffraction scattering, based on a total weight of the hard particle;
- and
- (C) graphite having an average particle size of 4 to 5.5 μm measured by laser diffraction scattering, wherein a weight ratio of (B) the hard particles and (C) the graphite, (B)/(C), is of from 1.46 to 2.47.
5 more elements
Dependencies are inferred from the claim text.