| 摘要 |
PROBLEM TO BE SOLVED: To obtain a coating material which can stably form a thin coating film excellent in electric insulating properties and rust prevention on the surface of a small molded item by attaching fine inorg. particles to the surfaces of resin particles comprising an epoxy resin contg. a specified amt. of specific aluminum hydroxide having a specified vol. average particle size to thereby impart a specified vol. average particle size to the resin particles. SOLUTION: Fine inorg. particles, pref. fine alumina or silica particles, pref. in an am. of 0.2-1 pt.wt., are attached to the surfaces of 100 pts.wt. resin particles prepd. by incorporating 70-120 pts.wt. aluminum hydroxide having a vol. average particle size of 1-5μm into 100 pts.wt. epoxy resin (e.g. a bisphenol A epoxy resin) to thereby impart a vol. average particle size of 10-20μm to the resin particles. Thus, a uniform thin coating film having a thickness of 50μm or lower can be formed on the surface of a small molded item (e.g. a motor core) having a shape including flat parts and edge parts.
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