Patent ID: 7559306

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 a hard particle 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; and a solid lubricant comprising 15 to 30 wt % of a polytetrafluoroethylene and 5 to 20 wt % of a molybdenum disulfide.