Patent ID: 8082899

Claim:
A double-layer lubrication coating composition comprising: an upper-layer coating composition comprising: 50 to 70 wt % of a bonding resin comprising at least one of an epoxy resin and a polyamide-imide resin; 5 to 20 wt % of a solid lubricant comprising a boron nitride; and 15 to 30 wt % of hard particles comprising at least one of silicone nitride and alumina; and a lower-layer coating composition comprising: 50 to 70 wt % of a bonding resin comprising at least one of an epoxy resin and a polyamide-imide resin; a solid lubricant comprising: 15 to 30 wt % of polytetrafluoroethylene; and a molybdenum disulfide and graphite, total amount of the molybdenum disulfide and the graphite being 5 to 20 wt %, and an amount of graphite being 1 to 10 wt %.