US3723223A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat curing adhesive
Assignee: Indopco Inc
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Filing: 1971-01-11
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Granted: 1973-03-27
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Expires: 1991-01-11
Abstract
Abstract An adhesive material having a long storage life is prepared by applying to a carrier, a coating composition comprising a blend of a solid epoxy resin, solid curing agent for the expoxy resin, a film-forming binder, and a dispersing medium and drying the coating to a tack-free film. The adhesive-coated carrier or the film without the carrier may be used to bond substrates by pressing the substrates together with the adhesive film between them at elevated temperatures.
Inventors
- 👤 Compte R Le
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:05
CPC Classifications
C; C09; C09J; C09J163/00; C09J7/00; C09J7/10; C09J7/30; C09J7/35
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
12 words
The method of claim 1 wherein the carrier is fiberglass sheet material.
Claim 2
Dependent Claim
11 words
The method of claim 1 wherein the carrier is asbestos sheet.
Claim 3
Dependent Claim
34 words
The method of claim 3 wherein the asbestos sheet is impregnated by forming a slurry of asbestos fibers in water and adding the composition to the slurry and forming the composite into a sheet.
Claim 4
Dependent Claim
16 words
The method of claim 1 wherein the hardener is a polymeric aniline formaldehyde aromatic amine adduct.
Claim 5
Dependent Claim
13 words
The method of claim 1 wherein the binder is a styrene-butadiene-styrene block copolymer.
Claim 6
Dependent Claim
11 words
The method of claim 1 wherein the dispersing medium is cyclohexane.
Claim 7
Dependent Claim
18 words
The method of claim 1 wherein the epoxy resin is a solid diglycidyl ether of a polyhydric phenol.
Claim 8
Dependent Claim
72 words
An adhesive material comprising a carrier coated or impregnated with a material comprising a thermoplastic binder constituting 1 to 95 percent by weight of said material having dispersed therein discrete solid particles of epoxy resin averaging more than one 1,2-epoxy group per molecule and discrete solid particles of a heat reactivatable epoxy reactive hardener, said resin and said hardener together constituting from 99 to 5 percent by weight of said adhesive material.
Claim 9
Dependent Claim
13 words
The adhesive material of claim 9 wherein the carrier is fiberglass sheet material.
Claim 10
Dependent Claim
16 words
The adhesive material of claim 9 wherein the hardener is an aniline formaldehyde aromatic amine adduct.
Claim 11
Dependent Claim
14 words
The adhesive material of claim 9 wherein the binder is a styrene-butadiene-styrene block copolymer.
Claim 12
Independent Claim
148 words
The method of forming a laminate comprising (1) applying to a carrier a coating composition comprising a blend of a room temperature solid epoxy resin averaging more than one 1,2-epoxy group per molecule, a room temperature solid epoxy reactive hardener in an amount sufficient to crosslink the epoxy resin, said resin and hardener together constituting from 99 to 5 percent by weight of the total solids content, a film forming thermoplastic binder constituting from 1 to 95 percent by weight of the total solids, and a dispersing medium constituting from 5 to 95 percent by weight of the said composition which is a non-solvent for the epoxy and the hardener and a solvent or dispersing medium for the binder, (2) drying the coating to a tack-free film and, (3) placing a substrate against the coated side of the carrier and subjecting the composite to a hot pressing operation.
Claim 13
Dependent Claim
36 words
The method of claim 13 wherein both sides of the carrier material are coated and two substrates are laminated to one another by pressing each substrate to a side of the coated carrier at high temperature.
Claim 14
Dependent Claim
12 words
The method of claim 13 wherein the carrier is fiberglass sheet material.
Claim 15
Dependent Claim
13 words
The method of claim 13 wherein the binder is a styrene-butadiene-styrene block copolymer.
Claim 16
Dependent Claim
15 words
The method of claim 13 wherein the hardener is an aniline formaldehyde aromatic amine adduct.
Claim 17
Dependent Claim
11 words
The method of claim 13 wherein the dispersing agent is cyclohexane.
Claim 18
Dependent Claim
18 words
The method of claim 13 wherein the epoxy resin is a solid diglycidyl ether of a polyhydric phenol.
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) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |