Thermosetting powder coating material and coated product
A thermosetting powder coating material includes powder particles containing a thermosetting resin, a thermosetting agent, and a surfactant. The amount of the surfactant is about 0.1 ppm or more and about 8.0 ppm or less on a mass basis.
1. A thermosetting powder coating material comprising:
powder particles containing a thermosetting resin, a thermosetting agent, and a surfactant,
wherein an amount of the surfactant is about 0.1 ppm or more and about 8.0 ppm or less on a mass basis.
2. The thermosetting powder coating material according to claim 1 , wherein the thermosetting resin contains a thermosetting polyester resin.
3. The thermosetting powder coating material according to claim 2 , wherein a sum of an acid value and a hydroxyl value of the thermosetting polyester resin is about 10 mg KOH/g or more and about 250 mg KOH/g or less.
4. The thermosetting powder coating material according to claim 3 , wherein the thermosetting polyester resin has a number-average molecular weight of about 1,000 or more and about 100,000 or less.
5. The thermosetting powder coating material according to claim 2 , wherein the thermosetting polyester resin has a glass transition temperature (Tg) of about 60° C. or lower.
6. The thermosetting powder coating material according to claim 1 , wherein the thermosetting resin contains a thermosetting (meth)acrylic resin.
7. The thermosetting powder coating material according to claim 6 , wherein the thermosetting (meth)acrylic resin has a number-average molecular weight of about 1,000 or more and about 20,000 or less.
8. The thermosetting powder coating material according to claim 6 , wherein the thermosetting (meth)acrylic resin has a glass transition temperature (Tg) of about 60° C. or lower.
9. The thermosetting powder coating material according to claim 1 , wherein the surfactant contains at least one selected from the group consisting of anionic surfactants and nonionic surfactants.
10. The thermosetting powder coating material according to claim 1 , wherein an amount of the thermosetting agent is about 1% by mass or more and about 30% by mass or less relative to an amount of the thermosetting resin.
11. The thermosetting powder coating material according to claim 1 , wherein the thermosetting powder coating material is free of a colorant.
12. The thermosetting powder coating material according to claim 1 , wherein the thermosetting powder coating material contains a metal element capable of having a valence of 2 or higher.
13. The thermosetting powder coating material according to claim 12 , wherein an amount of the metal element is about 0.002% by mass or more and about 0.2% by mass or less relative to a total amount of the thermosetting powder coating material.
14. The thermosetting powder coating material according to claim 1 , further comprising inorganic particles with hydrophobized surfaces.
15. The thermosetting powder coating material according to claim 14 , wherein the inorganic particles have a volume-average particle size of about 5 nm or more and about 40 nm or less.
16. The thermosetting powder coating material according to claim 14 , wherein an amount of the inorganic particles added is about 0.01% by mass or more and about 5% by mass or less relative to a total amount of the thermosetting powder coating material.
17. The thermosetting powder coating material according to claim 1 , wherein a volume particle size distribution index GSDv is about less than 1.20.
18. The thermosetting powder coating material according to claim 1 , wherein an average circularity is about 0.96 or more.
19. A coated product having a surface, comprising a coating film formed of the thermosetting powder coating material according to claim 1 on at least part of the surface.
20. The coated product according to claim 19 , wherein the coating film has a thickness of about 10 μm or more and about 120 μm or less.