Solvent-based paint composition and fluorine-containing copolymer

Patent metadata

Field	Value
Publication number	US-9920214-B2
Application number	US-201214008259-A
Country	US
Kind code	B2
Filing date	Mar 30, 2012
Priority date	Mar 31, 2011
Publication date	Mar 20, 2018
Grant date	Mar 20, 2018

Abstract

Provided is a paint composition which can give a coating having excellent stretchability and further having excellent contamination resistance. A solvent-based paint composition comprises a fluorocopolymer (I), and an organic solvent (II), the fluorocopolymer (I) including: a perhaloolefin structural unit (a) that contains two carbon atoms, a vinyl acetate structural unit (b), a hydroxyl group-containing vinyl monomer structural unit (c) represented by the following formula (1): CH 2 ═CH—O—(CH 2 ) n —OH wherein n is an integer of 2 or more, and a carboxyl group-containing monomer structural unit (d) represented by the following formula (2): R 1 R 2 C═CR 3 —(CH 2 ) m —COOH wherein R 1 , R 2 , and R 3 are the same as or different from one another, and each a hydrogen atom or a C1-C10 linear or branched alkyl group; and m is an integer of 2 or more.

First claim

The invention claimed is:

1. A solvent-based paint composition, comprising:
5 to 95% by mass of a fluorocopolymer (I), and
5 to 95% by mass of an organic solvent (II),
the fluorocopolymer (I) including:
a perhaloolefin structural unit (a) that contains two carbon atoms,
a vinyl acetate structural unit (b),
a hydroxyl group-containing vinyl monomer structural unit (c) represented by the following formula (1):
CH 2 ═CH—O—(CH 2 ) n —OH

wherein n is an integer of 2 or more, and
a carboxyl group-containing monomer structural unit (d) represented by the following formula (2):
R 1 R 2 C═CR 3 —(CH 2 ) n —COOH

wherein R 1 , R 2 , and R 3 are the same as or different from one another, and each represents a hydrogen atom or a C 1 -C 10 linear or branched alkyl group; and m is an integer of 8 or more,
wherein the fluorocopolymer (I) has an acid value of 1 to 9 mgKOH/g and a hydroxyl value of 20 to 65 mgKOH/g,
wherein the hydroxyl group-containing vinyl monomer structural unit (c) is hydroxybutyl vinyl ether,
wherein the carboxyl group-containing monomer structural unit (d) is undecylenic acid, and
wherein the perhaloolefin structural unit (a) is tetrafluoroethylene or chlorotrifluoroethylene.

2. The solvent-based paint composition according to claim 1 ,
wherein the fluorocopolymer includes 40 mol % or more and 50 mol % or less of the structural unit (a), 20 mol % or more and 54.9 mol % or less of the structural unit (b), 5 mol % or more and 14 mol % or less of the structural unit (c), and 0.1 mol % or more and 5 mol % or less of the structural unit (d), and further includes 0 mol % or more and 25 mol % or less of a monomer structural unit (e).

3. The solvent-based paint composition according to claim 1 , wherein the fluorocopolymer (I) has an acid value of 1 to 5.8 mgKOH/g.

4. A fluorocopolymer, comprising:
a perhaloolefin structural unit (a) that contains two carbon atoms;
a vinyl acetate structural unit (b);
a hydroxyl group-containing vinyl monomer structural unit (c) represented by the following formula (1):
CH 2 ═CH—O—(CH 2 ) n —OH

wherein n is an integer of 2 or more;
a carboxyl group-containing monomer structural unit (d) represented by the following formula (2):
R 1 R 2 C═CR 3 —(CH 2 ) m —COOH

wherein R 1 , R 2 , and R 3 are the same as or different from one another, and each represents a hydrogen atom or a C 1 -C 10 linear or branched alkyl group; and m is an integer of 2 or more; and
a monomer structural unit (e),
wherein the fluorocopolymer contains 40 mol % or more and 50 mol % or less of the structural unit (a), 20 mol % or more and 54.9 mol % or less of the structural unit (b), 5 mol % or more and 14 mol % or less of the structural unit (c), 0.1 mol % or more and 5 mol % or less of the structural unit (d), and more than 0 mol % and 25 mol % or less of the structural unit (e),
wherein the fluorocopolymer has an acid value of 1 to 9 mgKOH/g,
wherein the fluorocopolymer has a hydroxyl value of 20 to 65 mgKOH/g,
wherein the hydroxyl group-containing vinyl monomer structural unit (c) is hydroxyethyl vinyl ether or hydroxybutyl vinyl ether,
wherein the carboxyl group-containing monomer structural unit (d) is pentenoic acid, hexenoic acid, heptenoic acid, octenoic acid, nonenoic acid, decenoic acid, undecylenic acid, dodecenoic acid, tridecenoic acid, tetradecenoic acid, pentadecenoic acid, hexadecenoic acid, heptadecenoic acid, octadecenoic acid, nonadecenoic acid, or eicosenoic acid, and
wherein the monomer structural unit (e) is carboxylic acid vinyl esters with a carboxylic acid that contains 9 or more carbon atoms.

5. The fluorocopolymer according to claim 4 ,
wherein the copolymer has a number average molecular weight of 5,000 to 100,000.

6. The fluorocopolymer according to claim 4 , having an acid value of 1 to 5.8 mgKOH/g.

Assignees

• Imahori Yuji
• Yoshida Hirotoshi
• Iida Mayumi
• Ito Kengo
• Tanaka Yoshito
• Imoto Katsuhiko
• Kawabe Takuma
• OHYA Akiko
• Daikin Ind Ltd

Inventors

• Imahori Yuji
• Yoshida Hirotoshi
• Iida Mayumi
• Ito Kengo
• Tanaka Yoshito
• Imoto Katsuhiko
• Kawabe Takuma
• OHYA Akiko

Classifications

• C08F218/08

  Vinyl acetate · CPC title

• C09D127/18 Primary

  Homopolymers or copolymers of tetrafluoroethene · CPC title

• C08F214/186

  with non-fluorinated comonomers · CPC title

• C08F214/267

  with non-fluorinated vinyl ethers · CPC title

• C08F220/64

  Acids; Metal salts or ammonium salts thereof · CPC title