US3687894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
A composition of a liquid epoxy resin, a polyhydroxyl material and a hardener
Assignee: ANTHONY N CIANCIARULO
•
Filing: 1970-07-23
•
Granted: 1972-08-29
•
Expires: 1990-07-23
Abstract
Abstract Novel compositions and methods are presented for one step simultaneous advancement and B staging or curing of liquid epoxy resins. The methods involve forming a composition of the liquid epoxy resin, a hydroxyl containing material reactable therewith at elevated temperatures and a hardener therefor guanidine or its derivatives, applying the mixture to a suitable substrate and subjecting the composite to elevated temperatures. The compositions are useful for impregnation of substrates such as fiber glass for the production of laminates.
Inventors
- 👤 William G Collings
- 👤 Anthony N Cianciarulo
- 👤 Kwan-Tin Shen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:22
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/14; C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/4007; C08G59/4014; C08G59/4021; B32B15/20; C08G59/62; C08G59/621; B32B38/00; B32B2038/0052; B32B2038/0076; B32B2260/00; B32B2260/02; B32B2260/021; B32B2260/04; B32B2260/046; B32B2311/00; B32B2311/12
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
10 words
The composition of claim 1 wherein the hardener is dicyandiamIde.
Claim 2
Dependent Claim
25 words
The composition of claim 1 wherein there is present an accelerator capable of accelerating a reaction between the resin, the polyhydroxyl material and the hardener.
Claim 3
Dependent Claim
18 words
The composition of claim 2 wherein the liquid epoxy resin is the reaction product of epichlorohydrin and 2,2-bis(4-hydroxyphenyl)propane.
Claim 4
Dependent Claim
22 words
The composition of claim 4 wherein the epoxy resin has an epoxy value of from 0.3 to 1.5 equivalents per 100 grams.
Claim 5
Dependent Claim
10 words
The composition of claim 3 wherein the accelerator is benzyldimethylamide.
Claim 6
Dependent Claim
74 words
The composition of claim 1 wherein said mixture constitutes from about 50 - 80 percent by weight of said composition and in said mixture the liquid resin constitutes from about 60 - 85 percent by weight thereof, the polyhydroxyl material constitutes from 40 - 15 percent by weight thereof, and the hardener is present in from 1 - 10 parts per hundred parts of resin the remainder of said composition being the solvent system.
Claim 7
Dependent Claim
26 words
The composition of claim 7 wherein there is additionally present up to 0.7 parts of an accelerator defined in claim 3, per hundred parts of resin.
Claim 8
Dependent Claim
11 words
The composition of claim 3 wherein the polyhydroxyl material is halogenated.
Claim 9
Dependent Claim
13 words
The composition of claim 9 wherein the polyhydroxyl material is tetrabromo bisphenol A.
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) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |