Coating fluid

Patent metadata

Field	Value
Publication number	US-11655390-B2
Application number	US-201816754219-A
Country	US
Kind code	B2
Filing date	Nov 5, 2018
Priority date	Nov 7, 2017
Publication date	May 23, 2023
Grant date	May 23, 2023

Abstract

The present invention provides a coating fluid including: a hydroxy group-containing resin; an inorganic layered compound; and a liquid medium, in which a ratio (outflow time (B)/outflow time (A)) of outflow time (B) of a coating fluid at 5° C. measured by a Zahn cup to outflow time (A) of a coating fluid at 24° C. measured by a Zahn cup is 1.40 or less.

First claim

The invention claimed is:

1. A coating fluid, comprising:
a hydroxy group-containing resin that comprises a hydroxy group and an amino group;
an inorganic layered compound; and
a liquid medium, wherein
a ratio (outflow time (B)/outflow time (A)) of outflow time (B) of a coating fluid at 5° C. measured by a Zahn cup to outflow time (A) of a coating fluid at 24° C. measured by a Zahn cup is 1.40 or less, wherein a number average molecular weight of the hydroxy group-containing resin is 10,000 to 50,000.

2. The coating fluid according to claim 1 , wherein the outflow time (B)/outflow time (A) is 1.30 or less.

3. The coating fluid according to claim 1 , wherein an amount of a hydroxy group per 100 g of the hydroxy group-containing resin is 1.50 to 2.27 mol.

4. The coating fluid according to claim 1 , wherein an amount of the amino group per 100 g of the hydroxy group-containing resin is 0.046 to 0.682 mol.

5. The coating fluid according to claim 1 , wherein the hydroxy group-containing resin is a vinylamine-vinylalcohol copolymer.

6. The coating fluid according to claim 1 , wherein a content of the hydroxy group-containing resin is 0.2 to 9.05% by mass per 100% by mass of the coating fluid.

7. The coating fluid according to claim 1 , wherein the liquid medium contains water and ethanol.

8. The coating fluid according to claim 7 , wherein a content of ethanol is 1 to 70% by mass per 100% by mass of the total of water and ethanol.

9. The coating fluid according to claim 1 , wherein a content of the liquid medium is 90 to 99.5% by mass per 100% by mass of the coating fluid.

10. The coating fluid according to claim 1 , wherein an average particle size of the inorganic layered compound in the coating fluid is 0.02 to 3 μm.

11. The coating fluid according to claim 1 , wherein a ratio (L/a) of an average particle size L of the inorganic layered compound in the coating fluid to a thickness a of a unit crystal layer of an inorganic layered compound measured by powder X-ray diffraction method is 20 to 3,000.

12. The coating fluid according to claim 1 , wherein the inorganic layered compound is montmorillonite.

13. The coating fluid according to claim 1 , wherein a content of the inorganic layered compound is 0.047 to 6.0% by mass per 100% by mass of the coating fluid.

14. The coating fluid according to claim 1 , wherein a content of the inorganic layered compound is 0.047 to 5.0% by mass per 100% by mass of the coating fluid.

15. The coating fluid according to claim 4 , wherein the liquid medium contains water and ethanol.

16. The coating fluid according to claim 15 , wherein a content of the ethanol is 10 to 50% by mass per 100% by mass of the total of water and ethanol.

17. The coating fluid according to claim 5 , wherein the liquid medium contains water and ethanol.

18. The coating fluid according to claim 17 , wherein a content of the ethanol is 10 to 50% by mass per 100% by mass of the total of water and ethanol.

19. The coating fluid according to claim 7 , wherein a content of the ethanol is 10 to 50% by mass per 100% by mass of the total of water and ethanol.

Assignees

• Sumitomo Chemical Co

Inventors

• Oosaki Nobuhiro
• Sato Mizuki
• Shibata Daisuke

Classifications

• C09D201/025

  containing nitrogen atoms · CPC title

• C09D139/02 Primary

  Homopolymers or copolymers of vinylamine · CPC title

• C09D201/06

  containing oxygen atoms {(C09D201/025 takes precedence)} · CPC title

• C09D5/00 Primary

  Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced {(electrically insulating plastics, resins or waxes H01B3/30)}; Filling pastes · CPC title

• C08K3/346

  Clay · CPC title