Copolymer resin and coating composition

Patent metadata

Field	Value
Publication number	US-9683074-B2
Application number	US-201415118570-A
Country	US
Kind code	B2
Filing date	Dec 26, 2014
Priority date	Feb 19, 2014
Publication date	Jun 20, 2017
Grant date	Jun 20, 2017

Abstract

An object of the present invention is to provide a coating composition that has excellent storage stability, achieves water and oil repellency over a long period of time, and has excellent chemical resistance and processability. To achieve this object, the present invention provides a copolymer resin (A) comprising, as constituent components, a polybasic acid component (a1); a compound (a2) containing at least one member selected from a secondary-hydroxyl-group-containing polyhydric alcohol component (a21) and a compound (a22), which generates one or more secondary hydroxyl groups by reaction with one or more carboxyl groups; and a specific fluorine-containing diol (f), the component (f) being used in a proportion of 0.1 to 30 mass %, based on the total mass of the constituent components.

First claim

The invention claimed is:

1. A copolymer resin (A) obtained by polymerization of a mixture comprising, as constituent components,
a polybasic acid component (a1);
a compound (a2) containing at least one member selected from a secondary-hydroxyl-group-containing polyhydric alcohol component (a21) and a compound (a22), which generates one or more secondary hydroxyl groups by reaction with one or more carboxyl groups; and
a fluorine-containing diol (f) having hydroxyl groups at both ends and being represented by Formula (1) below,
the component (f) being used in a proportion of 0.1 to 30 mass %, based on the total mass of the constituent components:
HO—(C 2 H 4 O) a —(CH 2 CF 2 O)—R f —(CF 2 CH 2 O)—(C 2 H 4 O) b —H  Formula (1)

wherein a is an integer 0 to 20, b is an integer of 0 to 20, and R f represents Formula (2) below:

wherein c is an integer of 1 to 50, d is an integer of 0 to 50, and X represents a fluorine atom or CF 3 .

2. The copolymer resin (A) according to claim 1 , comprising phthalic anhydride and/or hexahydrophthalic anhydride, as the polybasic acid component (a1).

3. The copolymer resin (A) according to claim 1 , comprising at least one member selected from 1,2-propanediol and 2,2,4-trimethyl-1,3-pentanediol, as the secondary-hydroxyl-group-containing polyhydric alcohol component (a21).

4. The copolymer resin (A) according to claim 1 , further comprising a primary-hydroxy-containing polyhydric alcohol component (a23), as the compound (a2).

5. The copolymer resin (A) according to claim 4 , wherein the primary-hydroxy-containing polyhydric alcohol component (a23) is at least one member selected from trimethylolethane, trimethylolpropane, and pentaerythritol.

6. The copolymer resin (A) according to claim 4 , comprising, as the constituent components, the polybasic acid component (a1), the compound (a22), which generates one or more secondary hydroxyl groups by reaction with one or more carboxyl groups, the primary-hydroxy-containing polyhydric alcohol component (a23), and the fluorine-containing diol (f).

7. A coating composition comprising the copolymer resin (A) of claim 1 .

8. The coating composition according to claim 7 , further comprising a hydroxy-containing resin (B) and a crosslinking agent (C).

9. The coating composition according to claim 7 , comprising the copolymer resin (A) in an amount of 0.1 to 30 parts by mass, on a solids basis, per 100 parts by mass of the total solids content of the hydroxy-containing resin (B) and the crosslinking agent (C).

10. A coated article obtained by applying the coating composition of claim 7 .

Assignees

• Kansai Paint Co Ltd

Inventors

• Kawamura Chikara
• Nagai Akinori

Classifications

• C09D133/066

  containing -OH groups · CPC title

• C09D167/02

  Polyesters derived from dicarboxylic acids and dihydroxy compounds (C09D167/06 takes precedence) · CPC title

• C08G59/18

  Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups {; e.g. general methods of curing} · CPC title

• 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

• C08G63/682

  containing halogens · CPC title