Coating method for cationic electrodeposition coating material

Patent metadata

Field	Value
Publication number	US-2020399777-A1
Application number	US-201916971363-A
Country	US
Kind code	A1
Filing date	Feb 20, 2019
Priority date	Feb 23, 2018
Publication date	Dec 24, 2020
Grant date	—

Abstract

A coating method for a cationic electrodeposition coating material includes: a step of immersing a metallic article to be coated in a first solution bath, a step of immersing the article in a second solution bath and a step of immersing the article in a third solution bath; and at least one of the three steps includes a cationic electrodeposition coating in which a current is applied. A coating film formed through the three steps contains at least: a base resin component (A), a reaction component (B) and a catalyst (C). The first solution bath, the second solution bath and the third solution bath contain the base resin component (A), the reaction component (B) and the catalyst (C) in a combination of one or two of the components.

First claim

1 .- 8 . (canceled)

9 . A coating method for a cationic electrodeposition coating material, wherein a metallic article to be coated is coated by cationic electrodeposition, the method comprising:
a step of immersing the metallic article to be coated in a first solution bath; a step of immersing the metallic article to be coated in a second solution bath; and a step of immersing the metallic article to be coated in a third solution bath, wherein at least one of the three steps includes a cationic electrodeposition coating in which a current is applied, wherein a coating film formed through the three steps contains at least a base resin component (A), a reaction component (B) and a catalyst (C), and wherein the first solution bath, the second solution bath and the third solution bath contain the base resin component (A), the reaction component (B) and the catalyst (C) in a combination of one or two of the components.

10 . The coating method for the cationic electrodeposition coating material according to claim 9 , wherein the combination of the base resin component (A), the reaction component (B) and the catalyst (C) is respectively a Michael addition reaction acceptor component, a Michael addition reaction donor component and a Michael addition reaction catalyst, or the Michael addition reaction donor component, the Michael addition reaction acceptor component and the Michael addition reaction catalyst.

11 . The coating method for the cationic electrodeposition coating material according to claim 9 , wherein the combination of the base resin component (A), the reaction component (B) and the catalyst (C) is respectively an epoxy group-containing component, a thiol group-containing component and a catalyst; or the thiol group-containing component, the epoxy group-containing component and the catalyst.

12 . The coating method for the cationic electrodeposition coating material according to claim 9 , the method further comprising:
a step of water washing after at least one of the steps.

13 . The coating method for the cationic electrodeposition coating material according to claim 9 , wherein the catalyst (C) is a microencapsulated catalyst.

14 . The coating method for the cationic electrodeposition coating material according to claim 9 , the method further comprising:
a step of curing the formed coating film at a temperature of 130° C. or less.

15 . The coating method for the cationic electrodeposition coating material according to claim 9 , the method further comprising:
a step of curing the formed coating film by electromagnetic-induction heating.

16 . A coating method for a cationic electrodeposition coating material, wherein a metallic article to be coated is coated by cationic electrodeposition, the method comprising:
a step of immersing the metallic article to be coated in a first solution bath; and a step of immersing the metallic article to be coated in a second solution bath, wherein at least one of the two steps includes a cationic electrodeposition coating in which a current is applied, wherein a coating film formed through the two steps contains at least a base resin component (A), a reaction component (B) and a catalyst (C), and wherein the first solution bath and the second solution bath contain the base resin component (A), the reaction component (B) and the catalyst (C) in a combination of one or two of the components or in a combination of two of the components.

17 . The coating method for the cationic electrodeposition coating material according to claim 16 , wherein the combination of the base resin component (A), the reaction component (B) and the catalyst (C) is respectively a Michael addition reaction acceptor component, a Michael addition reaction donor component and a Michael addition reaction catalyst, or the Michael addition reaction donor component, the Michael addition reaction acceptor component and the Michael addition reaction catalyst.

18 . The coating method for the cationic electrodeposition coating material according to claim 16 , wherein the combination of the base resin component (A), the reaction component (B) and the catalyst (C) is respectively an epoxy group-containing component, a thiol group-containing component and a catalyst; or the thiol group-containing component, the epoxy group-containing component and the catalyst.

19 . The coating method for the cationic electrodeposition coating material according to claim 16 , the method further comprising:
a step of water washing after at least one of the steps.

20 . The coating method for the cationic electrodeposition coating material according to claim 16 , wherein the catalyst (C) is a microencapsulated catalyst.

21 . The coating method for the cationic electrodeposition coating material according to claim 16 , the method further comprising:
a step of curing the formed coating film at a temperature of 130° C. or less.

22 . The coating method for the cationic electrodeposition coating material according to claim 16 , the method further comprising:
a step of curing the formed coating film by electromagnetic-induction heating.

23 . The coating method for the cationic electrodeposition coating material according to claim 10 , the method further comprising:
a step of curing the formed coating film by electromagnetic-induction heating.

24 . The coating method for the cationic electrodeposition coating material according to claim 11 , the method further comprising:
a step of curing the formed coating film by electromagnetic-induction heating.

25 . The coating method for the cationic electrodeposition coating material according to claim 12 , the method further comprising:
a step of curing the formed coating film by electromagnetic-induction heating.

26 . The coating method for the cationic electrodeposition coating material according to claim 13 , the method further comprising:
a step of curing the formed coating film by electromagnetic-induction heating.

27 . The coating method for the cationic electrodeposition coating material according to claim 14 , the method further comprising:
a step of curing the formed coating film by electromagnetic-induction heating.

28 . The coating method for the cationic electrodeposition coating material according to claim 17 , the method further comprising:
a step of curing the formed coating film by electromagnetic-induction heating.

Assignees

• Kansai Paint Co Ltd

Inventors

• Fukui Takamasa
• Miyoshi Yuya
• Suehiro Akira

Classifications

• C25D13/22

  Servicing or operating {apparatus or multistep processes} · CPC title

• C25D13/00

  Electrophoretic coating characterised by the process (C25D15/00 takes precedence; compositions for electrophoretic coating C09D5/44) · CPC title

• C09D5/4453

  characterised by the nature of the curing agent · CPC title

• C09D5/4438

  Binder based on epoxy/amine adducts, i.e. reaction products of polyepoxides with compounds containing amino groups only · CPC title

• C08K5/17

  Amines; Quaternary ammonium compounds · CPC title