US4652398A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rapid curing, thermally stable adhesive composition comprising epoxy resin, polyimide, reactive solvent, and crosslinker
Assignee: Ingredion Inc
•
Filing: 1986-04-14
•
Granted: 1987-03-24
•
Expires: 2006-04-14
Abstract
Abstract A novel adhesive exhibiting low outgassing upon exposure to high temperatures is disclosed. The instant adhesive comprises: (a) an epoxy resin, (b) a soluble polyimide resin, (c) a reactive solvent; and (d) an alkenylphenol crosslinker which preferably contains polyhydroxy and polyalkenyl substituents. Optionally, the adhesive may also contain a conductive material.
Inventors
- 👤 Jagadish C. Goswami
- 👤 Richard A. Rehder
- 👤 Anthony L. DeSalvo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:50
CPC Classifications
H; H10; H10W; H10W72/00; H10W72/30; C; C08; C08F; C08F283/00; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/62; C08G59/621; C08L; C08L79/00; C08L79/04; C08L79/08; C09; C09J; C09J163/00; C09J179/00; C09J4/00; C09J4/06; H10W72/071; H10W72/073; H10W72/07331; H10W72/07337; H10W72/351; H10W72/353; H10W72/354
Claims Analysis
Total Claims: 41
Claim 1
Independent Claim
35 words
An adhesive composition comprising: (a) an epoxy resin; (b) a soluble polyimide resin; (c) a reactive solvent to dissolve the soluble polyimide resin into the epoxy resin; and (d), as a crosslinker, an alkenylphenol compound.
Claim 2
Dependent Claim
35 words
An adhesive composition comprising: (a) an epoxy resin; (b) a soluble polyimide resin; (c) a reactive solvent to dissolve the soluble polyimide resin into the epoxy resin; and (d), as a crosslinker, an alkenylphenol compound.
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 2% to about 15% by weight of the composition mixture.
Claim 5
Dependent Claim
29 words
A composition according to claim 1 wherein the reactive solvent contains an epoxide group at one end of its molecule linked to an aryl substituent at its other end.
Claim 6
Dependent Claim
13 words
A composition according to claim 4 wherein said diluent is phenyl glycidyl ether.
Claim 7
Dependent Claim
23 words
A composition according to claim 1 wherein said reactive solvent comprises from about 40% to about 55% by weight of the adhesive composition.
Claim 8
Dependent Claim
16 words
A composition according to claim 1 wherein said reactive solvent is a compound containing vinylic unsaturation.
Claim 9
Dependent Claim
12 words
A composition according to claim 7 wherein said solvent is N-vinyl pyrrolidone.
Claim 10
Dependent Claim
18 words
A composition according to claim 1 wherein said epoxy resin is a glycidyl polyether of a polyhydric phenol.
Claim 11
Dependent Claim
16 words
A composition according to claim 1 wherein said epoxy resin is a phenol epoxy novolac resin.
Claim 12
Dependent Claim
23 words
A composition according to claim 1 wherein said epoxy resin comprises from about 20% to about 35% by weight of the adhesive composition.
Claim 13
Dependent Claim
21 words
A composition according to claim 1 wherein the alkenylphenol crosslinker is present at from about 10% to about 25% by weight.
Claim 14
Dependent Claim
14 words
A composition according to claim 1 wherein the alkenylphenol compound has a bisphenol nucleus.
Claim 15
Dependent Claim
13 words
A composition as claimed in 13 where the compound is 2,2'-diallyl bisphenol A.
Claim 16
Dependent Claim
31 words
A composition as claimed in claim 1 wherein the epoxy resin is a phenol epoxy novolac resin, the solvent comprises phenyl glycidyl ether, and the alkenylphenol compound has a bisphenol nucleus.
Claim 17
Dependent Claim
15 words
A composition as claimed in claim 15 wherein the alkenylphenol compound is 2,2'-diallyl bisphenol A.
Claim 18
Dependent Claim
12 words
A composition according to claim 1 further comprising an imidazole curing agent.
Claim 19
Dependent Claim
13 words
A composition according to claim 17 wherein said curing agent is 2-ethyl-4-methyl imidazole.
Claim 20
Dependent Claim
23 words
A composition according to claim 17 wherein said curing agent comprises from about 0.1% to about 1% by weight of the adhesive composition.
Claim 21
Dependent Claim
31 words
A composition according to claim 1 wherein said composition further comprises a crosslinking agent which is reactive with vinylic unsaturation in the composition, said agent being a polyethylenically unsaturated organic compound.
Claim 22
Dependent Claim
13 words
A composition according to claim 20 wherein said crosslinking agent is triallyl-S-triazine-2,4,6 trione.
Claim 23
Dependent Claim
21 words
A composition according to claim 20 wherein said crosslinking agent comprises up to about 15% by weight of the adhesive composition.
Claim 24
Dependent Claim
13 words
A composition according to claim 1 which further comprises a free radical catalyst.
Claim 25
Dependent Claim
15 words
A composition according to claim 23 wherein said free radical catalyst is an organic peroxide.
Claim 26
Dependent Claim
15 words
A composition according to claim 23 wherein said free radical peroxide is di-tertiary butyl peroxide.
Claim 27
Dependent Claim
14 words
A composition according to claim 23 wherein said free radical catalyst is a peroxyketal.
Claim 28
Dependent Claim
14 words
A composition according to claim 23 wherein said free radical catalyst is t-butyl peroxybenzoate.
Claim 29
Dependent Claim
11 words
A composition according to claim 23 wherein said catalyst is 1,1'-azobis(cyclohexanecarbonitrile).
Claim 30
Dependent Claim
20 words
A composition according to claim 23 wherein said catalyst comprises up to about 5% by weight of the adhesive composition.
Claim 31
Dependent Claim
10 words
A composition according to claim 1 further comprising filler material.
Claim 32
Dependent Claim
11 words
A composition according to claim 30 wherein said filler is glass.
Claim 33
Dependent Claim
33 words
A composition according to claim 31 wherein said filler material comprises glass fillers of a size less than 10 microns and of a melting point from about 350° C. to about 500° C.
Claim 34
Dependent Claim
11 words
A composition according to claim 30 wherein said filler is silica.
Claim 35
Dependent Claim
18 words
A composition according to claim 33 wherein said filler is silica of a size less than 1 micron.
Claim 36
Dependent Claim
21 words
A composition according to claim 30 wherein said filler material comprises up to about 5% by weight of the adhesive composition.
Claim 37
Dependent Claim
11 words
A composition according to claim 1 further comprising a conductive material.
Claim 38
Dependent Claim
14 words
A composition according to claim 36 wherein the conductive material is a noble metal.
Claim 39
Dependent Claim
12 words
A composition according to claim 37 wherein the noble metal is silver.
Claim 40
Dependent Claim
19 words
A composition according to claim 36 wherein the conductive material is a noble metal coated on a non-noble metal.
Claim 41
Dependent Claim
23 words
A composition according to claim 36 wherein the conductive material comprises from about 150% to about 350% by weight 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) | 1990-03-23 | 1990-09-22 | 1991-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-23 | 1994-09-22 | 1995-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-23 | 1998-09-22 | 1999-03-24 | $7700.00 | Window Closed / Lapsed |