Process for manufacturing thermosetting resin particles for powder coating use
AssigneeNippon Paint Co., Ltd.
InventorsHaruhiko Sato, Yutaka Harada
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Abstract
A process for manufacturing thermosetting resin particles for powder coating use exhibiting improved anti-blocking property and workability is disclosed. The process include providing a suspension of the thermosetting resin particles in an aqueous medium and an emulsion or dispersion of a vinyl-based polymer having a relatively high Tg, respectively. The thermosetting resin particles are then treated with the emulsion while the resin particles are still suspended in or wetted with the aqueous medium to adhere the vinyl based polymer onto the resin particles forming a shell layer. The resin particles are dried and made to ready to use in the powder coating.
Claims13
A process for manufacturing thermosetting resin particles for powder coating use comprising
- (a) producing an aqueous suspension of said thermosetting resin particles by suspending a liquid thermosetting resin composition in an aqueous medium as oil droplet and then allowing the oil droplets to solidify while being suspended in the aqueous medium;
- (b) providing an aqueous emulsion or dispersion of a vinyl based polymer having an average particle size of not greater than one tenth of the average particle size of said thermosetting resin particles;
- (c) treating said thermosetting resin particles with said emulsion or dispersion of said vinyl based polymer while said thermosetting resin particles are suspended in or wetted with said aqueous medium to adhere said vinyl based polymer onto the surfaces of said thermosetting particles;
- and
- (d) drying said thermosetting particles thus treated.
Dependencies are inferred from the claim text.