Powder paint and painted article

Patent metadata

Field	Value
Publication number	US-2016355690-A1
Application number	US-201615241234-A
Country	US
Kind code	A1
Filing date	Aug 19, 2016
Priority date	Apr 18, 2014
Publication date	Dec 8, 2016
Grant date	—

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 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 the group consisting of 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).

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 , which further contains from 0.1 to 30 mass ppm relative to the fluororesin (A), of free chlorine atoms.

6 . The powder paint according to claim 5 , wherein the mass ratio of the metal element (B) to the free chlorine atoms is from 1.0 to 10.0.

7 . The powder paint according to claim 1 , which further contains from 10 to 400 parts by mass of a non-fluororesin (E) per 100 parts by mass of the fluororesin (A).

8 . 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.

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

10 . The powder paint according to claim 7 , wherein the non-fluororesin (E) is an acrylic resin or a polyester resin.

11 . A painted article having a cured film of the powder paint as defined in claim 1 on the surface of a substrate.

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

13 . The painted article according to claim 11 , wherein the water contact angle of the cured film is from 1 to 55°.

Assignees

• Asahi Glass Co Ltd

Inventors

• Saito Shun
• Alkawa Masataka

Classifications

• C09D5/033

  characterised by the additives · CPC title

• C09D201/04

  containing halogen atoms · CPC title

• C09D127/12

  containing fluorine atoms · CPC title

• C09D7/48

  Stabilisers against degradation by oxygen, light or heat · CPC title

• B05D2202/25

  based on Al · CPC title