US4732702A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroconductive resin paste
Assignee: Resonac Corp
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Filing: 1987-01-20
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Granted: 1988-03-22
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Expires: 2007-01-20
Abstract
Abstract An electroconductive resin paste, comprising a resin obtained by reacting 0.01 to 0.5 carboxylic acid equivalent of a homopolymer or a copolymer of butadiene having carboxylic acid terminal groups with 1 epoxy equivalent of an epoxy resin having two or more epoxy groups in one molecule, a curing agent and an electroconductive filler which is (i) an electroconductive metal powder or (ii) an inorganic insulating powder coated with a surface electroconductive film, said electroconductive filler being in an amount of from 60 to 95% by weight based on the resin and the electroconductive filler.
Inventors
- 👤 Mitsuo Yamazaki
- 👤 Iwao Maekawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:41
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/24; H; H01; H01B; H01B1/00; H01B1/20; H01B1/22; C08; C08G; C08G59/00; C08G59/02; C08G59/12; C08K; C08K3/00; C08K3/02; C08K3/08; C09D109/00; H05; H05K; H05K1/00; H05K1/02; H05K1/09; H05K1/092; H05K1/095
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
94 words
An electroconductive resin paste, comprising a resin obtained by reacting 0.01 to 0.5 carboxylic acid equivalent of a homopolymer or a copolymer of butadiene having carboxylic acid terminal groups with 1 epoxy equivalent of an epoxy resin having two or more epoxy groups in one molecule, a curing agent and an electroconductive filler which is (i) an electroconductive metal powder or (ii) an inorganic insulating powder coated with a surface electroconductive film, said electroconductive filler being in an amount of from 60 to 95% by weight based on the resin and the electroconductive filler.
Claim 2
Dependent Claim
94 words
An electroconductive resin paste, comprising a resin obtained by reacting 0.01 to 0.5 carboxylic acid equivalent of a homopolymer or a copolymer of butadiene having carboxylic acid terminal groups with 1 epoxy equivalent of an epoxy resin having two or more epoxy groups in one molecule, a curing agent and an electroconductive filler which is (i) an electroconductive metal powder or (ii) an inorganic insulating powder coated with a surface electroconductive film, said electroconductive filler being in an amount of from 60 to 95% by weight based on the resin and the electroconductive filler.
Claim 3
Dependent Claim
36 words
The electroconductive resin paste according to claim 1, wherein the electroconductive filler is silver powder, gold powder, copper powder, alumina powder coated with a surface electroconductive film, or glass powder coated with a surface electroconductive film.
Claim 4
Dependent Claim
15 words
The electroconductive resin paste according to claim 2, wherein the electroconductive filler is silver powder.
Claim 5
Dependent Claim
25 words
The electroconductive resin paste according to claim 1, wherein said curing agent is a phenolic resin, an imidazole, a dicyanidiamide or a dicarboxylic acid dihydrazide.
Claim 6
Dependent Claim
14 words
The electroconductive resin paste according to claim 1, wherein further comprises a curing accelerator.
Claim 7
Dependent Claim
20 words
The electroconductive resin paste according to claim 5, which said curing a accelerator is an imidazole or a tertiary amine.
Claim 8
Dependent Claim
25 words
The electroconductive resin paste according to claim 2, wherein said curing agent is a phenolic resin, an imidazole, a dicyandiamide or a dicarboxylic acid dehydrazide.
Claim 9
Dependent Claim
14 words
The electroconductive resin paste according to claim 7, which further comprises a curing accelerator.
Claim 10
Dependent Claim
14 words
The electroconductive resin paste according to claim 2, which further comprises a curing accelerator.
Claim 11
Dependent Claim
19 words
The electroconductive resin paste according to claim 4, wherein said curing accelerator is an imidazole or a tertiary amine.
Claim 12
Dependent Claim
15 words
The electroconductive resin paste according to claim 10, wherein the electroconductive filler is silver powder.
Claim 13
Dependent Claim
15 words
The electroconductive resin paste according to claim 8, wherein the electroconductive filler is silver powder.
Claim 14
Dependent Claim
15 words
The electroconductive resin paste according to claim 4, wherein the electroconductive filler is silver powder.
References Cited (Backward Citations)
US4496475A
Cited
US4410457A
Cited
US4369068A
Cited
US4575432A
Cited
US4595604A
Cited
US4581158A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-03-22 | 1991-09-21 | 1992-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-22 | 1995-09-21 | 1996-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-22 | 1999-09-21 | 2000-03-22 | $7700.00 | Window Closed / Lapsed |