Electroconductive ink composition

Patent metadata

Field	Value
Publication number	US-9481804-B2
Application number	US-201314394766-A
Country	US
Kind code	B2
Filing date	Apr 15, 2013
Priority date	Apr 16, 2012
Publication date	Nov 1, 2016
Grant date	Nov 1, 2016

Abstract

An electroconductive ink composition comprising silver particles (A), a compound having a siloxane backbone with a functional group (B), and an organic solvent (C), the silver particles (A) having a protective layer containing an amino group-containing compound and having a mean particle size of 1 nm or more and 100 nm or less, the content of the compound (B) being 4% by weight to 8% by weight based on the total amount of the composition, can form a circuit pattern on a polymer film with low heat resistance, and the obtained circuit pattern has excellent adhesion to a substrate and high conductivity.

First claim

The invention claimed is:

1. An electroconductive ink composition comprising silver particles (A), a compound having a siloxane backbone with a functional group (B), and an organic solvent (C), the silver particles (A) having a protective layer containing an amino group-containing compound (a-1) having a boiling point of less than 100° C. and an amino group-containing compound (a-2) having a boiling point of 100° C. or more and having a mean particle size of 1 nm or more and 100 nm or less, the content of the compound (B) being 4% by weight to 8% by weight based on the total amount of the composition.

2. The electroconductive ink composition according to claim 1 , wherein the weight ratio of the amino group-containing compound (a-1):the amino group-containing compound (a-2) is in the range of 15:85 to 70:30.

3. The electroconductive ink composition according to claim 1 , wherein the functional group of the compound having a siloxane backbone with a functional group (B) is one or more selected from the group consisting of an amino group, an isocyanate group, a cyano group, a vinyl group, an epoxy group, and a mercapto group.

4. The electroconductive ink composition according to claim 1 , wherein the organic solvent (C) has a solubility parameter (SP value) of 12 (cal/cm 3 ) 1/2 or less.

5. An electroconductive ink composition comprising silver particles (A), a compound having a siloxane backbone with a functional group (B), and an organic solvent (C), the silver particles (A) having a protective layer containing an amino group-containing compound (a-1) having a boiling point of less than 100° C. and an amino group-containing compound (a-2) having a boiling point of 100° C. or more and having a mean particle size of 1 nm or more and 100 nm or less, the content of the compound (B) being 5 parts by weight to 13 parts by weight based on 100 parts by weight of the silver particles (A).

6. A polymer film comprising the electroconductive ink composition according to claim 1 , wherein the polymer film is made of a polymer with a glass transition temperature of 100° C. or less.

7. The polymer film according to claim 6 , wherein the surface of the polymer film is coated with a ceramic or a metal.

8. A conductive circuit pattern formed using the electroconductive ink composition according to claim 1 .

9. The electroconductive ink composition according to claim 2 , wherein the weight ratio of the amino group-containing compound (a-1):the amino group-containing compound (a-2) is in the range of 30:70 to 60:40.

10. The electroconductive ink composition according to claim 1 , wherein the compound having a siloxane backbone with a functional group (B) is at least one selected from the group consisting of vinyltriethoxysilane and 3-(triethoxysilyl)propylamine, the organic solvent (C) is at least one selected from the group consisting of cyclohexanol, toluene and hexane/2-propanol mixed solvent at the ration of 3/2, the amino group-containing compound (a-1) is n-butylamine and the amino group-containing compound (a-2) is at least one selected from the group consisting of n-dodecylamine and n-octylamine.

11. The electroconductive ink composition according to claim 5 , wherein the weight ratio of the amino group-containing compound (a-1):the amino group-containing compound (a-2) is in the range of 15:85 to 70:30.

12. The electroconductive ink composition according to claim 11 , wherein the weight ratio of the amino group-containing compound (a-1):the amino group-containing compound (a-2) is in the range of 30:70 to 60:40.

13. The electroconductive ink composition according to claim 5 , wherein the functional group of the compound having a siloxane backbone with a functional group (B) is one or more selected from the group consisting of an amino group, an isocyanate group, a cyano group, a vinyl group, an epoxy group, and a mercapto group.

14. The electroconductive ink composition according to claim 5 , wherein the organic solvent (C) has a solubility parameter (SP value) of 12 (cal/cm 3 ) 1/2 or less.

15. The electroconductive ink composition according to claim 5 , wherein the compound having a siloxane backbone with a functional group (B) is at least one selected from the group consisting of vinyltriethoxysilane and 3-(triethoxysilyl)propylamine, the organic solvent (C) is at least one selected from the group consisting of cyclohexanol, toluene and hexane/2-propanol mixed solvent at the ratio of 3/2, the amino group-containing compound (a-1) is n-butylamine and the amino group-containing compound (a-2) is at least one selected from the group consisting of n-dodecylamine and n-octylamine.

16. The electroconductive ink composition according to claim 5 , wherein the electroconductive ink composition is for a polymer film made of a polymer with a glass transition temperature of 100° C. or less.

17. The electroconductive ink composition according to claim 16 , wherein the surface of the polymer film is coated with a ceramic or a metal.

18. A conductive circuit pattern formed using the electroconductive ink composition according to claim 5 .

Assignees

• Daiso Co Ltd
• Osaka Soda Co Ltd

Inventors

• Kawamura Kensuke
• Umakoshi Hideaki

Classifications

• C09D11/52 Primary

  Electrically conductive inks · CPC title

• C09D11/033

  characterised by the solvent · CPC title

• H05K1/097

  Inks comprising nanoparticles and specially adapted for being sintered at low temperature (H05K1/095 takes precedence) · CPC title

• C09D11/037

  characterised by the pigment · CPC title