Method for manufacture of particles for powder coating
AssigneeNippon Paint Co., Ltd.
InventorsHaruhiko Satoh, Yutaka Harada, Atsushi Yamada
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Abstract
A method for manufacture of particles for powder coating is disclosed in which the particles are prepared from a suspension obtained from a mixture of a thermosetting resin solution and an aqueous solution containing a water-soluble polymer. The thermosetting resin solution contains A resin, B resin and an organic solvent wherein: (a) 0.5≦{(SP value of the A resin)−(SP value of the B resin)}≦1.5; (b) {(Tg of the A resin)−(Tg of the B resin)}≧10° C.; (C) 40° C.≦(Tg of the A resin)≦100° C., and, 20° C.≦(Tg of the B resin)≦50° C., and (d) 5/95≦(a ratio in solids weight of the A resin to B resin)≦50/50.
Claims17
A method for manufacture of particles for powder coating in which the particles are prepared from a suspension obtained from a mixture of a thermosetting resin solution and an aqueous solution containing a water-soluble polymer, wherein said thermosetting resin solution contains A resin, B resin and an organic solvent wherein:
- (a) 0.5≦{(SP value of the A resin)−(SP value of the B resin)}≦1.5;
- (b) {(Tg of the A resin)−(Tg of the B resin)}≧10° C.;
- (C) 40° C.≦(Tg of the A resin)≦100° C., and, 20° C.≦(Tg of the B resin)≦50° C.;
- and
- (d) 5/95≦(a ratio in solids weight of the A resin to B resin)≦50/50.
Spherical particles for powder coating, containing A and B resins wherein:
- (a) 0.5≦{(SP value of the A resin)−(SP value of the B resin)}≦1.5;
- (b) {(Tg of the A resin)−(Tg of the B resin)}≧10° C.;
- (C) 40° C.≦(Tg of the A resin)≦100° C., and, 20° C.≦(Tg of the B resin)≦50° C.;
- and
- (d) 5/95≦(a ratio in solids weight of the A resin to B resin)≦50/50.
Dependencies are inferred from the claim text.