Patent US174105A successfully refreshed from Google Patents.
US3907623A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymer curing system
Assignee: PPG Industries Inc
•
Filing: 1973-04-04
•
Granted: 1975-09-23
•
Expires: 1993-04-04
Abstract
Abstract Microporous films are charged with selected polymer curing agents and brought into contact with a curable material to thereby crosslink it. Specific curable materials useful both for the microporous film and the curable polymer include epoxy resins which form strong adhesive bonding systems in various environments.
Inventors
- 👤 Rostyslaw Dowbenko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:44
CPC Classifications
B; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/1055; B32B17/10559; B32B17/10577; B32B17/10009; B32B17/10036; C; C09; C09J; C09J5/00; C09J5/04; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249978; Y10T428/31504; Y10T428/31511; Y10T428/31515; Y10T428/31518
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
99 words
A METHOD OF BONDING TWO SURFACES TOGETHER COMPRISING: A. FORMING ON ONE OF SAID SURFACES A POLYMERIC FILM WHICH CONTAINS A PLURALITY OF DISCRETE, OPEN VIODS, B. CHARGING SAID VOIDS WITH A CURING AGENT FOR A EPOXY RESIN SYSTEM, C. PROVIDING A LAYER OF CURABLE BUT UNCURED EPOXY RESIN SYSTEM BETWEEN SAID CHARGED FILM AND THE OTHER OF SAID SURFACES, D. CONTACTING SAID CHARGED FILM WITH SAID UNCURED RESIN SYSTEM AND SAID UNCURED EPOXY RESIN SYSTEM WITH SAID OTHER OF SAID SURFACES, AND E. CURING SAID EPOXY RESIN SYSTEM TO THEREBY REFFECT AN ADHESIVE BOND BETWEEN THE TWO SURFACES.
Claim 2
Independent Claim
99 words
A METHOD OF BONDING TWO SURFACES TOGETHER COMPRISING: A. FORMING ON ONE OF SAID SURFACES A POLYMERIC FILM WHICH CONTAINS A PLURALITY OF DISCRETE, OPEN VIODS, B. CHARGING SAID VOIDS WITH A CURING AGENT FOR A EPOXY RESIN SYSTEM, C. PROVIDING A LAYER OF CURABLE BUT UNCURED EPOXY RESIN SYSTEM BETWEEN SAID CHARGED FILM AND THE OTHER OF SAID SURFACES, D. CONTACTING SAID CHARGED FILM WITH SAID UNCURED RESIN SYSTEM AND SAID UNCURED EPOXY RESIN SYSTEM WITH SAID OTHER OF SAID SURFACES, AND E. CURING SAID EPOXY RESIN SYSTEM TO THEREBY REFFECT AN ADHESIVE BOND BETWEEN THE TWO SURFACES.
Claim 3
Dependent Claim
57 words
A method according to claim 1 wherein said film is formed by applying to one of said surfaces a film composition comprising: A. a thermosetting resin; and B. a solvent-extractable, thermoplastic resin, said resins being at least partially compatible before said thermosetting resin is cured, curing said thermosetting resin, and extracting said thermoplastic resin from said film.
Claim 4
Dependent Claim
14 words
A method according to claim 2 wherein said thermosetting resin is an epoxy resin.
Claim 5
Independent Claim
86 words
A METHOD OF BONDING TWO SURFACES TOGETHER COMPRISING: A. FORMING ON ONE SIDE OF EACH EACH OF SAID SURFACES A POLYMERIC FILM WHICH CONTAINS A PLURALITY OF DISCRETE, OPEN VOIDS, B. CHARGING SAID VOIDS WITH A CURING AGENT FOR A THERMOSETTING RESIN SYSTEM, C. APPLYING A LAYER OF CURABLE BUT UNCURED THERMOSETTING RESIN TO ONE OF SAID CHARGED FILMS, D. CONTACTING THE OTHER CHARGED FILM WITH SAID UNCURED THERMOSETTING RESIN, AND E. CURING SAID THERMOSETTING RESIN TO THEREBY EFFECT AND ADHESIVE BOND BETWEEN THE TWO SURFACES.
Claim 6
Independent Claim
86 words
A METHOD OF BONDING TWO SURFACES TOGETHER COMPRISING: A. FORMING ON ONE SIDE OF EACH EACH OF SAID SURFACES A POLYMERIC FILM WHICH CONTAINS A PLURALITY OF DISCRETE, OPEN VOIDS, B. CHARGING SAID VOIDS WITH A CURING AGENT FOR A THERMOSETTING RESIN SYSTEM, C. APPLYING A LAYER OF CURABLE BUT UNCURED THERMOSETTING RESIN TO ONE OF SAID CHARGED FILMS, D. CONTACTING THE OTHER CHARGED FILM WITH SAID UNCURED THERMOSETTING RESIN, AND E. CURING SAID THERMOSETTING RESIN TO THEREBY EFFECT AND ADHESIVE BOND BETWEEN THE TWO SURFACES.
Claim 7
Dependent Claim
59 words
A method according to claim 4 wherein at least one of said films is formed by applying to said surface a film composition comprising: A. a thermosetting resin; and B. a solvent-extractable, thermoplastic resin, said resins being at least partially compatible before said thermosetting resin is cured, curing said thermosetting resin, and extracting said thermoplastic resin from said film.
Claim 8
Dependent Claim
14 words
A method according to claim 5 wherein said thermosetting resin is an epoxy resin.
References Cited (Backward Citations)
US3218190A
Cited
US3216882A
Cited
US3390037A
Cited
US3749591A
Cited
US3544489A
Cited
US3577257A
Cited
US3490936A
Cited
US3682848A
Cited
US3778536A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-22 | 1979-03-24 | 1979-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-22 | 1983-03-24 | 1983-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-22 | 1987-03-24 | 1987-09-23 | $7700.00 | Window Closed / Lapsed |