US4692272A
Expired / Lapsed
US
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Thermally stable adhesive comprising soluble polyimide resin and epoxy resin
Assignee: Ingredion Inc
•
Filing: 1985-09-12
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Granted: 1987-09-08
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Expires: 2005-09-12
Abstract
Abstract A novel adhesive exhibiting low outgassing upon exposure to high temperatures is disclosed. The instant adhesive comprises: (a) a soluble polyimide resin, (b) a solvent for said polyimide resin, (c) an epoxy resin, (d) a cross-linking agent reactive with the polyimide solvent of (b), and (e) a catalyst which accelerates the reaction between (b) and (d). Optionally, the adhesive may also contain a conductive material. A process for making the adhesive is also disclosed.
Inventors
- 👤 Jagadish C. Goswami
- 👤 Joseph A. Aurichio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:40
CPC Classifications
C; C09; C09J; C09J179/00; C08; C08F; C08F283/00; C08L; C08L79/00; C08L79/04; C08L79/08; C09J163/00
Claims Analysis
Total Claims: 54
Claim 1
Independent Claim
44 words
An adhesive composition comprising: (a) a soluble polyimide resin; (b) a solvent for said polyimide resin; (c) an epoxy resin; (d) a cross-linking agent reactive with the polyimide solvent of (b); and (e) a catalyst which catalyzes the cross-linking reaction of (b) and (d).
Claim 2
Dependent Claim
44 words
An adhesive composition comprising: (a) a soluble polyimide resin; (b) a solvent for said polyimide resin; (c) an epoxy resin; (d) a cross-linking agent reactive with the polyimide solvent of (b); and (e) a catalyst which catalyzes the cross-linking reaction of (b) and (d).
Claim 3
Dependent Claim
29 words
A composition according to claim 1 wherein the soluble polyimide resin is a polyimide resin derived from phenylindane diamines and dianhydrides, polyamide acid or a partially imidized polyamide acid.
Claim 4
Dependent Claim
24 words
A composition according to claim 1 wherein said soluble polyimide resin comprises from about 1.5% to about 21% by weight of the reaction mixture.
Claim 5
Dependent Claim
25 words
A composition according to claim 1 wherein the solvent for the polyimide resin is an ethylenically unsaturated organic compound having one or more unsaturated sites.
Claim 6
Dependent Claim
13 words
A composition according to claim 4 wherein said polyimide solvent is N-vinyl pyrrolidinone.
Claim 7
Dependent Claim
26 words
A composition according to claim 1 wherein said solvent for the polyimide resin comprises from about 15% to about 60% by weight of the adhesive composition.
Claim 8
Dependent Claim
18 words
A composition according to claim 1 wherein said epoxy resin is a glycidyl polyether of a polyhydric phenol.
Claim 9
Dependent Claim
18 words
A composition according to claim 1 wherein said epoxy resin is a glycidyl ether of a polyhydric alcohol.
Claim 10
Dependent Claim
18 words
A composition according to claim 1 wherein said epoxy resin is a glycidyl ester of a polycarboxylic acid.
Claim 11
Dependent Claim
18 words
A composition according to claim 1 wherein said epoxy resin is a glycidyl polyether of a polyhydric alcohol.
Claim 12
Dependent Claim
23 words
A composition according to claim 1 wherein said epoxy resin comprises from about 3% to about 30% by weight of the adhesive composition.
Claim 13
Dependent Claim
31 words
A composition according to claim 1 furthe comprising a hardener for said epoxy resin selected from the group of aliphatic amines having at least three active amine hydrogen atoms per molecule.
Claim 14
Dependent Claim
25 words
A composition according to claim 12 wherein said hardener for said epoxy resin is an amidoamine obtained by reacting a polyamine with a fatty acid.
Claim 15
Dependent Claim
23 words
A composition according to claim 12 wherein said hardener for said epoxy resin is selected from the group consisting of mercaptans and isocyanates.
Claim 16
Dependent Claim
18 words
A composition according to claim 12 wherein said hardener for said epoxy resin is an anhydride curing agent.
Claim 17
Dependent Claim
19 words
A composition according to claim 15 wherein said hardeners for said epoxy resin are methyl-bicyclo (2.2.1)heptane-2,3 dicarboxylic anhydride isomers.
Claim 18
Dependent Claim
17 words
A composition according to claim 12 wherein said hardener for said epoxy resin is an aromatic amine.
Claim 19
Dependent Claim
23 words
A composition according to claim 1 comprising a hardener for said epoxy selected from the group consisting of non-heat reactive phenolic novolak hardeners.
Claim 20
Dependent Claim
15 words
A composition according to claim 1 comprising bis(4-hydroxyphenyl)-2,2-propane as a hardener for the epoxy resin.
Claim 21
Dependent Claim
26 words
A composition according to claim 12 wherein said hardener for said epoxy resin comprises from about 3% to about 15% by weight of the adhesive composition.
Claim 22
Dependent Claim
29 words
A composition according to claim 1 further comprising a catalyst accelerating the curing of said epoxy resin selected from the group consisting of alkyl or aryl substituted imidazole catalysts.
Claim 23
Dependent Claim
13 words
A composition according to claim 21 wherein said catalyst is 2-ethyl, 4-methyl imidazole.
Claim 24
Dependent Claim
22 words
A composition according to claim 21 wherein said catalyst comprises from about 0.3% to about 3% by weight of the adhesive composition.
Claim 25
Dependent Claim
23 words
A composition according to claim 1 wherein said cross-linking agent reactive with the solvent for the polyimide is a polyethylenically unsaturated organic compound.
Claim 26
Dependent Claim
13 words
A composition according to claim 24 wherein said cross-linking agent is triallyl-S-triazine-2,4,6 trione.
Claim 27
Dependent Claim
23 words
A composition according to claim 1 wherein said cross-linking agent comprises from about 15% to about 60% by weight of the adhesive composition.
Claim 28
Dependent Claim
41 words
A composition according to claim 1 wherein said catalyst catalyzing the cross-linking reaction of (b) and (d) is an organic catalyst having a half life, preferably, but not necessarily, of the same order as the cure time at the temperature chosen.
Claim 29
Dependent Claim
14 words
A composition according to claim 27 wherein said organic catalyst is an organic peroxide.
Claim 30
Dependent Claim
14 words
A composition according to claim 28 wherein said organic peroxide is di-tertiary butyl peroxide.
Claim 31
Dependent Claim
13 words
A composition according to claim 27 wherein said organic catalyst is a peroxyketal.
Claim 32
Dependent Claim
14 words
A composition according to claim 28 wherein said organic catalyst is a t-amyl peroxide.
Claim 33
Dependent Claim
19 words
A composition according to claim 1 wherein said catalyst catalyzing the cross-linking reaction between (b) and (d) is 1,1'-azobis(cyclohexanecarbonitrile).
Claim 34
Dependent Claim
30 words
A composition according to claim 1 wherein said catalyst catalyzing the cross-linking reaction between (b) and (d) comprises from about 1.5% to about 15% by weight of the adhesive composition.
Claim 35
Dependent Claim
20 words
A composition according to claim 1 further comprising filler material selected from the group consisting of glass or silica fillers.
Claim 36
Dependent Claim
11 words
A composition according to claim 34 wherein said filler is glass.
Claim 37
Dependent Claim
34 words
A composition according to claim 35 wherein said filler material comprises glass fillers of a size less than 10 microns and preferably of a melting point from about 350° C. to about 500° C.
Claim 38
Dependent Claim
11 words
A composition according to claim 34 wherein said filler is silica.
Claim 39
Dependent Claim
18 words
A composition according to claim 37 wherein said filler is silica of a size less than 1 micron.
Claim 40
Dependent Claim
23 words
A composition according to claim 34 wherein said filler material comprises from about 0.3% to about 15% by weight of the adhesive composition.
Claim 41
Dependent Claim
11 words
A composition according to claim 1, further comprising a conductive material.
Claim 42
Dependent Claim
14 words
A composition according to claim 40 wherein the conductive material is a noble metal.
Claim 43
Dependent Claim
12 words
A composition according to claim 41 wherein the noble metal is silver.
Claim 44
Dependent Claim
19 words
A composition according to claim 40 wherein the conductive material is a noble metal coated on a non-noble metal.
Claim 45
Dependent Claim
23 words
A composition according to claim 40 wherein the conductive material comprises from about 55% to about 70% by weight of the reaction mixture.
Claim 46
Dependent Claim
21 words
A composition according to claim 1 cured at about 90° C. to about 120° C. for a suitable period of time.
Claim 47
Dependent Claim
19 words
A composition according to claim 45 cured at about 90° C. to about 120° C. for about 45 minutes.
Claim 48
Dependent Claim
22 words
A composition according to claim 45 further cured at about 200° C. to about 280° C. for a suitable period of time.
Claim 49
Dependent Claim
20 words
A composition according to claim 47 further cured at about 200° C. to about 280° C. for about 30 minutes.
Claim 50
Dependent Claim
21 words
A composition according to claim 40 cured at about 90° C. to about 120° C. for a suitable period of time.
Claim 51
Dependent Claim
19 words
A composition according to claim 49 cured at about 90° C. to about 120° C. for about 45 minutes.
Claim 52
Dependent Claim
22 words
A composition according to claim 49 further cured at about 200° C. to about 280° C. for a suitable period of time.
Claim 53
Dependent Claim
20 words
A composition according to claim 51 further cured at about 200° C. to about 280° C. for about 30 minutes.
Claim 54
Dependent Claim
18 words
A composition according to claim 1 cured at about 50° C. for about 10 to about 15 minutes.
References Cited (Backward Citations)
US4401777A
Cited
US4557860A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-09-07 | 1991-03-09 | 1991-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-09-07 | 1995-03-09 | 1995-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-09-07 | 1999-03-09 | 1999-09-08 | $7700.00 | Window Closed / Lapsed |