Electrically conductive paste
US-9761349-B2 · Sep 12, 2017 · US
Electroconductive silver paste
US10119045B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10119045-B2 |
| Application number | US-201615542689-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 13, 2016 |
| Priority date | Jan 14, 2015 |
| Publication date | Nov 6, 2018 |
| Grant date | Nov 6, 2018 |
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- Title
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- Abstract
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Abstract
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The present invention provides an electroconductive paste which is excellent in a stability upon storage for a long period and in an anti-migration property, and capable of forming electrodes, wirings and sheets having a low resistance, an extensibility and a repetitive stretchability. An electroconductive silver paste, characterized in that, it contains a silver powder (A) and a rubber (B) containing a nitrile group, that a ratio by weight of (A)/(B) is within a range of from 77/23 to 90/10, that the silver powder (A) is an amorphous aggregated powder and/or a flaky powder, and that a content of an alkali metal in the nitrile group-containing rubber (B) is 4,000 ppm or less.
First claim
Opening claim text (preview).
The invention claimed is: 1. An electroconductive silver paste, characterized in that, it contains a silver powder (A) and a rubber (B) containing a nitrile group, that a ratio by weight of (A)/(B) is within a range of from 77/23 to 90/10, that the silver powder (A) is an amorphous aggregated powder and/or a flaky powder, and that a content of an alkali metal in the nitrile group-containing rubber (B) is 4,000 ppm or less. 2. The electroconductive silver paste according to claim 1 , wherein the nitrile group-containing rubber (B) is an acrylonitrile-butadiene rubber and/or a hydrogenated acrylonitrile-butadiene rubber, and a content of the nitrile group therein is 25% by weight or more. 3. The electroconductive silver paste according to claim 1 , wherein a content of the alkali metal in the nitrile group-containing rubber (B) is 1,500 ppm or less. 4. The electroconductive silver paste according to claim 1 , wherein the silver powder (A) is an amorphous aggregated powder. 5. The electroconductive silver paste according to claim 1 , wherein the paste is capable of forming an electroconductive film having a specific resistance of less than 1.0×10 −3 (Ω·cm). 6. The electroconductive silver paste according to claim 1 , wherein the paste is capable of forming an electroconductive film having an elongation at break of more than 35% and, when a repetitive stretchability is evaluated with an elongation rate of 20%, the electroconductive film is not broken even if an extension and contraction is repeated for 50 times or more.
Assignees
Inventors
Classifications
Copolymers with acrylonitrile · CPC title
- C09D11/52Primary
Electrically conductive inks · CPC title
Hydrogenated nitrile rubber · CPC title
containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds · CPC title
Pigment inks · CPC title
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Frequently asked questions
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- What does patent US10119045B2 cover?
- The present invention provides an electroconductive paste which is excellent in a stability upon storage for a long period and in an anti-migration property, and capable of forming electrodes, wirings and sheets having a low resistance, an extensibility and a repetitive stretchability. An electroconductive silver paste, characterized in that, it contains a silver powder (A) and a rubber (…
- Who is the assignee on this patent?
- Toyo Boseki
- What technology area does this patent fall under?
- Primary CPC classification C09D11/52. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Nov 06 2018 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).