| 摘要 |
1344681 Abrasive articles NORTON CO 5 Aug 1971 [7 Aug 1970] 36796/71 Heading C4V An abrasive tool has the abrasive grains bonded by an organic polymer bond, the abrasive grits being diamond or metal clad cubic boron nitride particles or both, and the bond containing from 10-50% by volume of finely divided metal fillers such as silver, silvercoated copper or copper or a combination of these, in the presence of 5-30% of a particulate dry film lubricant filler. Numerous suitable synthetic resin bonding materials are specified such as phenol-aldehyde resins, melaminealdehyde resins, polyester resins and epoxy novolacs. The filler may consist partly of conventional particulate fillers such as silicon carbide. The diamond abrasive particles may also be coated, e.g. with copper. The lubricant filler may be graphite, fluorinated graphite, metal-coated graphite, hexagonal boron nitride, tungsten disulphide, molybdenum disulphide, niobium diselenide and tungsten diselenide. Organic dry-film lubricants may be extrusion grades of various polymers such as ABS terpolymers, acetal copolymers, chlorinated polyethers, polytetrafluorotrifluoroethylene, fluorinated ethylene-propylene copolymers, and numerous other copolymers that are listed. |
