| 摘要 |
45598CAN5B This invention relates to a coated abrasive having a plurality of abrasive grains bonded to a backing by means of one or more binders, in particular a binder formed from an epoxy resin that is coatable from water. Coated abrasives comprise a backing having abrasive grains bonded thereto by one or more binders. These binders typically comprise a glutinous or resinous adhesive, and may optionally contain one or more additives. Binders are typically applied by coating from an organic solvent. In recent years, however, there has been a need to coat these resins exclusively from water on account of increasingly stringent pollution legislation. Accordingly, it is desired to provide a coated abrasive article having an overcoating containing an epoxy resin and a grinding aid, wherein the epoxy resin can be coated from water. This invention provides a coated abrasive article having a coating comprising a composition formed from an epoxy resin that is capable of being coated from water, a curing agent, and optionally a grinding aid dispersed in the epoxy resin. It is preferred that the coat containing the epoxy resin and the grinding aid be the outermost coat of the coated abrasive article, e.g. the size coat or supersize coat, in order to position the grinding aid in direct contact with the workpiece being abraded.
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