Antifriction coating formulation compositions

Abstract

An antifriction coating formulation composition is disclosed. The antifriction coating formulation composition contains (a) a resin and (b) a metal sulfide containing molybdenum and cobalt, and optionally (c) a solid lubricant other than the metal sulfide and (d) a solvent. A coated film formed from the antifriction coating formulation composition provides better wear resistance as well as good coefficient of friction.

1 . An antifriction coating formulation composition comprising:
 (a) a resin and   (b) a metal sulfide comprising molybdenum and cobalt,   wherein the molar ratio of molybdenum and cobalt in the metal sulfide is from 99 to 1 to 1 to 99.   
     
     
         2 . The antifriction coating formulation composition of  claim 1 , wherein the amount of the metal sulfide is from 10 to 60 parts by weight, with respect to 100 parts by weight of the solid contents of the antifriction coating formulation composition. 
     
     
         3 . The antifriction coating formulation composition of  claim 1 , wherein the average particle size of the metal sulfide is from 0.1 to 10 micrometers observed by Scanning Electron Microscope. 
     
     
         4 . The antifriction coating formulation composition of  claim 1 , further comprising at least one (c) solid lubricant other than the metal sulfide. 
     
     
         5 . The antifriction coating formulation composition of  claim 4 , wherein the solid lubricant is selected from graphite, polytetrafluoroethylene and polyethylene. 
     
     
         6 . The antifriction coating formulation composition of  claim 1 , further comprising (d) a solvent. 
     
     
         7 . The antifriction coating formulation composition of  claim 1 , wherein the resin is selected from polyamideimide, polyimide, polyamide, epoxy resin, phenol resin, polybenzimidazole, polyphenyl sulfonate, polyether ether ketone, polyurethane, poly-butyltitanate, polyacryl-alkyd resin, polyether ketone ketone, polyoxymethylene, polybutylene terephthalate, or fluoropolymers. 
     
     
         8 . The antifriction coating formulation composition of  claim 1 , wherein the ratio of molybdenum and cobalt in the metal sulfide is from 85 to 15 to 95 to 5. 
     
     
         9 . A coated film formed from the antifriction coating formulation composition of  claim 1 . 
     
     
         10 . The coated film of  claim 9 , wherein the film is formed on a metal surface of a component. 
     
     
         11 . A sliding member having a lubricating film formed from the antifriction coating formulation composition of  claim 1 . 
     
     
         12 . The sliding member of  claim 11 , wherein the sliding member is selected from a swash plate of a compressor, an engine tappet, a camshaft, a crankshaft, an engine metal, an engine piston, an engine fastener, a slide bearing, a piston ring, a gear, a door lock, a brake shim and a brake clip.