Aqueous coating agent and article using same

Patent metadata

Field	Value
Publication number	US-9803087-B2
Application number	US-201414901905-A
Country	US
Kind code	B2
Filing date	Jun 12, 2014
Priority date	Jul 9, 2013
Publication date	Oct 31, 2017
Grant date	Oct 31, 2017

Abstract

The present invention provides an aqueous coating agent including a vinyl polymer (A) having a basic nitrogen atom-containing group and a carboxylic group, a quaternary ammonium salt (B), and an aqueous medium (C). Particularly, the present invention provides an aqueous coating agent including a compound represented by General Formula (1) below as the quaternary ammonium salt (B). The aqueous coating agent has excellent adhesiveness, warm water resistance, corrosion resistance, and chemical resistance, and can form a film that is capable of preventing the deterioration of various substrates.

In General Formula (1), R 1 to R 4 each independently represent an alkyl group having 1 to 20 carbon atoms or an aryl group.

First claim

The invention claimed is:

1. An aqueous coating agent comprising:
a vinyl polymer (A) having a basic nitrogen atom-containing group, which is at least one selected from an N,N-dimethylaminoethyl group, an N,N-dimethylaminopropyl group and an N,N-diethylaminopropyl group, and a carboxylic group;
a quaternary ammonium salt (B) represented by General Formula (1) below;
an aqueous medium (C); and
a nonionic emulsifier (D),
wherein the nonionic emulsifier (D) is a polyoxyalkylene branched decyl ether:

wherein, in General Formula (1), R 1 to R 4 each independently represent an alkyl group having 1 to 20 carbon atoms or an aryl group.

2. The aqueous coating agent according to claim 1 ,
wherein the quaternary ammonium salt (B) is included in an amount of 0.1 parts by mass to 10 parts by mass with respect to 100 parts by mass of the vinyl polymer (A).

3. The aqueous coating agent according to claim 1 ,
wherein the vinyl polymer (A) has 30 mmol/kg to 700 mmol/kg of a basic nitrogen atom-containing group, and has 50 mmol/kg to 1,200 mmol/kg of a carboxylic group.

4. The aqueous coating agent according to claim 1 ,
wherein the molar ratio of the basic nitrogen atom-containing group to the carboxylic group [basic nitrogen atom-containing group/carboxylic group] in the vinyl polymer (A) is in a range of 0.1 to 3.

5. The aqueous coating agent according to claim 1 ,
wherein the nonionic emulsifier (D) is included in an amount of 0.1 parts by mass to 10 parts by mass with respect to 100 parts by mass of the vinyl polymer (A).

6. An article comprising a film of the aqueous coating agent according to claim 1 .

7. A metal article comprising a film of the aqueous coating agent according to claim 1 .

8. The aqueous coating agent according to claim 2 ,
wherein the vinyl polymer (A) has 30 mmol/kg to 700 mmol/kg of a basic nitrogen atom-containing group, and has 50 mmol/kg to 1,200 mmol/kg of a carboxylic group.

9. The aqueous coating agent according to claim 2 ,
wherein the molar ratio of the basic nitrogen atom-containing group to the carboxylic group [basic nitrogen atom-containing group/carboxylic group] in the vinyl polymer (A) is in a range of 0.1 to 3.

10. The aqueous coating agent according to claim 3 ,
wherein the molar ratio of the basic nitrogen atom-containing group to the carboxylic group [basic nitrogen atom-containing group/carboxylic group] in the vinyl polymer (A) is in a range of 0.1 to 3.

11. The aqueous coating agent according to claim 2 ,
wherein the nonionic emulsifier (D) is included in an amount of 0.1 parts by mass to 10 parts by mass with respect to 100 parts by mass of the vinyl polymer (A).

12. The aqueous coating agent according to claim 3 ,
wherein the nonionic emulsifier (D) is included in an amount of 0.1 parts by mass to 10 parts by mass with respect to 100 parts by mass of the vinyl polymer (A).

13. The aqueous coating agent according to claim 4
wherein the nonionic emulsifier (D) is included in an amount of 0.1 parts by mass to 10 parts by mass with respect to 100 parts by mass of the vinyl polymer (A).

14. An article comprising a film of the aqueous coating agent according to claim 2 .

15. An article comprising a film of the aqueous coating agent according to claim 3 .

16. An article comprising a film of the aqueous coating agent according to claim 4 .

17. An article comprising a film of the aqueous coating agent according to claim 5 .

18. A metal article comprising a film of the aqueous coating agent according to claim 2 .

19. A metal article comprising a film of the aqueous coating agent according to claim 3 .

20. A metal article comprising a film of the aqueous coating agent according to claim 4 .

21. A metal article comprising a film of the aqueous coating agent according to claim 5 .

Assignees

• Dainippon Ink & Chemicals

Inventors

• Nagahama Sadamu
• Shirakami Jun

Classifications

• C09D7/40

  Additives · CPC title

• C09D5/082

  characterised by the anti-corrosive pigment · CPC title

• B05D1/28

  performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers · CPC title

• B05D1/305

  Curtain coating · CPC title

• C09D133/14

  of esters containing halogen, nitrogen, sulfur or oxygen atoms in addition to the carboxy oxygen · CPC title