Powder coating material, coated article, and method for producing coated article

Patent metadata

Field	Value
Publication number	US-2017335117-A1
Application number	US-201715670673-A
Country	US
Kind code	A1
Filing date	Aug 7, 2017
Priority date	Mar 2, 2015
Publication date	Nov 23, 2017
Grant date	—

Abstract

To provide a powder coating material capable of forming a film excellent in metallic hue, concealing property and weather resistance. The powder coating material comprises the following fluororesin (A), the following resin (B) and the following pigment (C) as constituents thereof, wherein the content of the pigment (C) is from 0.7 to 23 mass %; Fluororesin (A): a fluororesin having a fluorine content of at least 10 mass %; Resin (B): a resin having a SP value larger than that of the fluororesin (A), and the difference between the SP value thereof and the SP value of the fluororesin (A) is at least 0.4 (J/cm 3 ) 1/2 ; Pigment (C): a pigment which is a metallic pigment covered with a covering material, and the SP value of the covering material exceeds the SP value of the fluororesin (A) and less than the SP value of the resin (B).

First claim

What is claimed is:

1 . A powder coating material characterized by comprising, as constituents thereof, the following fluororesin (A), the following resin (B) and the following pigment (C), wherein the content of the pigment (C) to the total amount of the powder coating material is from 0.7 to 23 mass %,
Fluororesin (A): a fluororesin having a fluorine content of at least 10 mass %, Resin (B): a resin having a SP value larger than that of the fluororesin (A), and the difference between the SP value thereof and the SP value of the fluororesin (A) is at least 0.4 (J/cm 3 ) 1/2 , Pigment (C): a pigment which is a metallic pigment covered with a covering material, and the SP value of the covering material exceeds the SP value of the fluororesin (A) and less than the SP value of the resin (B).

2 . The powder coating material according to claim 1 , wherein the powder coating material is made of a powder comprising powder particles containing the fluororesin (A) and the resin (B) and powder particles composed of the pigment (C).

3 . The powder coating material according to claim 1 , wherein the powder coating material is made of a powder comprising powder particles containing the fluororesin (A), powder particles containing the resin (B) and powder particles composed of the pigment (C).

4 . The powder coating material according to claim 1 , wherein the fluororesin (A) is a polyvinylidene fluoride.

5 . The powder coating material according to claim 1 , wherein the fluororesin (A) is a fluororesin having hydroxy groups or carboxy groups.

6 . The powder coating material according to claim 5 , wherein the powder particles containing the fluororesin (A) further contain a curing agent.

7 . The powder coating material according to claim 1 , wherein the resin (B) is a fluororesin having a fluorine content of less than 10 mass %, or a resin having no fluorine atom.

8 . The powder coating material according to claim 7 , wherein the resin (B) is a resin having reactive groups.

9 . The powder coating material according to claim 8 , wherein the resin (B) is a polyester resin, an acrylic resin or an epoxy resin.

10 . The powder coating material according to claim 8 , wherein the powder particles containing the resin (B) further contain a curing agent.

11 . The powder coating material according to claim 1 , wherein the covering material in the pigment (C) is made of at least one member selected from the group consisting of a resin, an aliphatic compound, an aromatic compound and a silane compound.

12 . The powder coating material according to claim 1 , wherein the pigment (C) is a metallic pigment composed of scaly aluminum particles covered with a covering material.

13 . A coated article having, on the surface of a substrate, a coating film formed from the powder coating material as defined in claim 1 .

14 . A method for producing a coated article having a coating film on the surface of a substrate, characterized by applying the powder coating material as defined in claim 1 to a substrate to form a film of the powder, heating the film of the powder to form a film made of a melt of the powder, and cooling the film made of the melt to form a coating film.

Assignees

• Asahi Glass Co Ltd

Inventors

• Ochi Shuhei
• Aikawa Masataka
• Saito Shun

Classifications

• C09D7/62

  modified by treatment with other compounds · CPC title

• B05D7/24

  for applying particular liquids or other fluent materials · CPC title

• C09D5/035 Primary

  Coloring agents, e.g. pigments (C09D5/032 takes precedence) · CPC title

• C09D127/12

  containing fluorine atoms · CPC title

• C09D5/03

  Powdery paints · CPC title