Powder paint and painted article

Patent metadata

Field	Value
Publication number	US-10246592-B2
Application number	US-201615241234-A
Country	US
Kind code	B2
Filing date	Aug 19, 2016
Priority date	Apr 18, 2014
Publication date	Apr 2, 2019
Grant date	Apr 2, 2019

Abstract

To provide a powder paint whereby an external defect such as orange-peel skin is less likely to be formed on a formed cured film. The powder paint is characterized by comprising: a fluororesin (A); from 2 to 60 mass ppm relative to the fluororesin (A), of at least one metal element (B) selected from a group comprising potassium, sodium, and magnesium; from 10 to 10,000 mass ppm relative to the fluororesin (A), of a light stabilizer (C); and from 10 to 5,000 mass ppm relative to the fluororesin (A), of a polymerization inhibitor (D).

First claim

What is claimed is:

1. A powder paint, comprising:
a fluororesin (A),
at least one metal element (B) selected from the group consisting of potassium, sodium and magnesium in an amount of from 2 to 60 mass ppm relative to the fluororesin (A),
a light stabilizer (C) in an amount of from 10 to 10,000 mass ppm relative to the fluororesin (A),
a polymerization inhibitor (D) in an amount of from 100 to 5,000 mass ppm relative to the fluororesin (A), and
free chlorine atoms with a mass ratio of the metal element (B) to the free chlorine atoms of from 1.0 to 10.0.

2. The powder paint according to claim 1 , wherein the fluororesin (A) is at least one member selected from the group consisting of a polyvinylidene fluoride and a copolymer containing units based on a fluoroolefin and units having a reactive group.

3. The powder paint according to claim 1 , wherein the fluororesin (A) is a fluororesin having a glass transition temperature of at least 30° C.

4. The powder paint according to claim 1 , wherein the fluororesin (A) has a number average molecular weight of from 3,000 to 50,000.

5. The powder paint according to claim 1 , wherein an amount of the free chlorine atoms ranges from 0.1 to 30 mass ppm relative to the fluororesin (A).

6. The powder paint according to claim 1 , further comprising:
a non-fluororesin (E) in an amount of from 10 to 400 parts by mass per 100 parts by mass of the fluororesin (A).

7. The powder paint according to claim 1 , wherein the light stabilizer (C) is a hindered amine light stabilizer having a molecular weight of from 300 to 5,000 and a melting point of from 50 to 250° C.

8. The powder paint according to claim 1 , wherein the polymerization inhibitor (D) is a hydroquinone.

9. The powder paint according to claim 6 , wherein the non-fluororesin (E) is an acrylic resin or a polyester resin.

10. A painted article, comprising:
a cured film of the powder paint according to claim 1 on a substrate surface.

11. The painted article according to claim 10 , wherein the cured film has a thickness of from 100 to 1,000 μm.

12. The painted article according to claim 10 , wherein the cured film has a water content angle of from 1 to 55°.

Assignees

• Agc Inc

Inventors

• Saito Shun
• Aikawa Masataka

Classifications

• C09D167/00

  Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain (based on polyester-amides C09D177/12; based on polyester-imides C09D179/08); Coating compositions based on derivatives of such polymers · CPC title

• C08K3/22

  of metals · CPC title

• C09D201/00

  Coating compositions based on unspecified macromolecular compounds · CPC title

• C23C4/12

  characterised by the method of spraying · CPC title

• C23C4/134

  Plasma spraying · CPC title