| 摘要 |
PURPOSE:To improve durability by coating the surface of core particles with a coating material contg. a polymer which consists essentially of a specific imide group-contg. unsatd. monomer and hydroxyl group-contg. unsatd. monomer as well as an amino resin and/or alkyl etherified amino resin. CONSTITUTION:The surface of the core particle is coated with the coating material contg. the polymer which consists essentially of the specific imide group-contg. unsatd. monomer expressed by the formula I and hydroxyl group- contg. unsatd. monomer as well as the amino resin and/or alkyl etherified amino resin. In the formula I, R1 denotes hydrogen or methyl group; R2 denotes an alkylene group of 1-6C or bivalent org. group having alicycle or arom. ring; R3 denotes the formulas II, III, etc.; Y1-Y8 denote hydrogen, alkyl group of 1-3C. The excellent durability is thereby obtd. |
