IP Library › Granted Patent US 12692407
Granted Patent B2
US 12692407 · App. 18/409,155 · Granted Jul 28, 2026

Powder coating material composition

Inventors: Hirotake Imada (Osaka, JP); Toshio Miyatani (Osaka, JP); Yukari Honda (Osaka, JP); Yasukazu Nakatani (Osaka, JP)
Assignee: DAIKIN INDUSTRIES, LTD.
C09D127/18B05D1/04C09D7/48
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Quick Facts
Patent No.
US 12692407
App. No.
18/409,155
Granted
Jul 28, 2026
Kind
B2
Abstract

A powder coating material composition including a tetrafluoroethylene-based copolymer, wherein the tetrafluoroethylene-based copolymer is a copolymer of 9.0 to 13.0 mass % of hexafluoropropylene, 0.8 to 3.0 mass % of a perfluoroalkyl vinyl ether, and tetrafluoroethylene, having a melt flow rate of 13 to 26 g/10-min, a melting point of 240 to 270° C., an average particle size of 5 to 500 μm and an apparent density of 0.5 to 1.1 g/ml. Also disclosed is a film that is formed from the powder coating material composition, a laminate including the film, a coated article wherein the film of the powder coating material composition is provided on a metal substrate, and a film-forming method which includes forming a primer film on an object to be coated, and forming a film on a surface of the primer film using the powder coating material composition.

Claims (12)

1 . A powder coating material composition, comprising a tetrafluoroethylene-based copolymer, wherein the tetrafluoroethylene-based copolymer is a copolymer of 9.0 to 13.0 mass % of hexafluoropropylene, 0.8 to 3.0 mass % of a perfluoropropyl vinyl ether, and tetrafluoroethylene, having a melt flow rate of 13 to 26 g/10-min, a melting point of 240 to 270° C., an average particle size of 5 to 500 μm and an apparent density of 0.5 to 1.1 g/ml.

2 . The powder coating material composition according to claim 1 , further comprising a thermal stabilizer and/or a coloring pigment.

3 . The powder coating material composition according to claim 2 , wherein the thermal stabilizer is at least any one selected from the group consisting of an amine-type antioxidant, an organic sulfur-containing compound, and a metal powder.

4 . A film formed from the powder coating material composition according to claim 1 .

5 . A film formed form the powder coating material composition according to claim 1 by an electrostatic coating method.

6 . A laminate, comprising the film according to claim 4 .

7 . A laminate, comprising the film according to claim 4 in a surface layer.

8 . A coated article, wherein the film according to claim 4 is provided on a metal substrate.

9 . A coated article, wherein a metal substrate is piping, a pipe, or a duct, and the film according to claim 4 is provided on an inner surface thereof.

10 . A film-forming method, comprising:

(1) forming a primer film on an object to be coated; and

(2) forming a film on a surface of the primer film by using the powder coating material composition according to claim 1 by an electrostatic coating method.