Patent JPS5638484A successfully refreshed from Google Patents.
US4624801A
Expired / Lapsed
US
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Anisotropically electroconductive adhesive
Assignee: Shin-Etsu Polymer Co Ltd
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Filing: 1985-08-12
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Granted: 1986-11-25
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Expires: 2005-08-12
Abstract
Abstract The inventive electroconductive adhesive comprises a resinous matrix, as a dispersing medium of conductive particles, of a polyester-based urethane resin admixed with a masked isocyanate compound as the curing agent. By virtue of the masking of the isocyanate reactivity of the curing agent, the adhesive composition is stable during prolonged storage under a hot temperature or high-humidity condition but can exhibit curing activity when the adhesive is heated at a temperature at which the isocyanate reactivity can be restored.
Inventors
- 👤 Toshiyuki Kawaguchi
- 👤 Takashi Nogami
- 👤 Koichi Nei
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:33
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/30; H05K3/32; H05K3/321; H05K3/323; C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/80; C08G18/8061; C08K; C08K3/00; C08K3/02; C08K3/04; C08K3/08; C08K3/10; C08K3/14; C08K3/34; C09; C09J; C09J175/00; C09J175/04; C09J175/06; C08L; C08L2666/00; C08L2666/54
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
33 words
An electroconductive adhesive composition which comprises a matrix of an electrically insulating, thermosetting polyester-based urethane resin admixed with a masked isocyanate compound as the curing agent and electroconductive particles dispersed in the matrix.
Claim 2
Dependent Claim
33 words
An electroconductive adhesive composition which comprises a matrix of an electrically insulating, thermosetting polyester-based urethane resin admixed with a masked isocyanate compound as the curing agent and electroconductive particles dispersed in the matrix.
Claim 3
Dependent Claim
36 words
The electroconductive adhesive composition as claimed in claim 1 wherein the thermosetting polyester-based urethane resin is a reaction product of a polyester compound having an acid value of 8 or smaller and a polyfunctional isocyanate compound.
Claim 4
Dependent Claim
40 words
The electroconductive adhesive composition as claimed in claim 1 wherein the masked isocyanate compound is an isocyanate compound masked with a masking agent selected from the group consisting of phenols, lactams, amides, tertiary alcohols, aromatic secondary amines and sodium hydrogensulfite.
Claim 5
Dependent Claim
41 words
The electroconductive adhesive composition as claimed in claim 1 wherein the amount of the masked isocyanate compound is such that at least an equimolar amount of the isocyanate groups therein is provided to the hydroxy groups in the polyester-based urethane resin.
Claim 6
Dependent Claim
35 words
The electroconductive adhesive composition as claimed in claim 1 wherein the amount of the electroconductive particles is in the range from 5 to 30% by volume based on the overall volume of the adhesive composition.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-11-24 | 1990-05-26 | 1990-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-11-24 | 1994-05-26 | 1994-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-11-24 | 1998-05-26 | 1998-11-25 | $7700.00 | Window Closed / Lapsed |