| 摘要 |
<p>This invention relates to a coated abrasive product having an overcoating, in particular an overcoating formed from an epoxy resin. Coated abrasive products 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. Examples of resinous adhesives include epoxy resins, phenolic resins, urethane resins, acrylate resins, and aminoplast resins. The binders previously referred to 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. This invention provides a coated abrasive product having a coating comprising a composition formed from an epoxy resin that is capable of being coated from water, a curing agent, and 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 product, e.g., the size coat or supersize coat, in order to position the grinding aid in direct contact with the workpiece being abraded. <IMAGE></p> |
