US3691133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyepoxide compositions containing dicyandiamide and an iodonium, phosphonium, or sulfonium salt
Assignee: Union Carbide Corp
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Filing: 1971-03-25
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Granted: 1972-09-12
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Expires: 1991-03-25
Abstract
Abstract The disclosure of this application is directed to polyepoxide compositions, containing dicyandiamide and an iodonium, phosphonium or sulfonium salt, which are relatively stable at room temperature and can be cured at moderately elevated temperatures in a relatively short period of time to thermoset products characterized by excellent thermal stability, and when used in adhesive applications to bond together materials such as wood, plastic and metal, by excellent bonding strength.
Inventors
- 👤 James J Sura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:35
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/50; C08G59/4007; C08G59/4014; C08G59/4021; C08G59/68; C08G59/687; C08G59/688
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
30 words
A curable composition as defined in claim 1 wherein the dicyandiamide is present in an amount of about 70 percent of stoichiometric to about 25 percent in excess of stoichiometric.
Claim 2
Dependent Claim
33 words
A curable composition as defined in claim 1 wherein the said salt is present in an amount of about 5 to about 40 percent by weight, based on the weight of the dicyandiamide.
Claim 3
Dependent Claim
18 words
A curable composition as defined in claim 1 wherein the polyepoxide is a polyglycidylether of a polyhydric phenol.
Claim 4
Dependent Claim
16 words
A curable composition as defined in claim 1 wherein the polyepoxide is the diglycidylether of 2,2-bis-(p-hydroxyphenyl)propane.
Claim 5
Dependent Claim
15 words
A curable composition as defined in claim 1 wherein the said salt has the formula:
Claim 6
Dependent Claim
15 words
A curable composition as defined in claim 1 wherein the said salt has the formula:
Claim 7
Dependent Claim
16 words
A curable composition as defined in claim 1 wherein the said salt is trimethyl sulfonium iodide.
Claim 8
Dependent Claim
17 words
A curable composition as defined in claim 1 wherein the said salt is ethyl triphenyl phosphonium iodide.
Claim 9
Dependent Claim
15 words
A curable composition as defined in claim 8 wherein the polyepoxide is diglycidylether of 2,2-bis-(p-hydroxy-phenyl)propane.
Claim 10
Dependent Claim
16 words
A curable composition as defined in claim 9 wherein the polyepoxide is diglycidyl ether of 2,2-bis-(p-hydroxyphenyl)propane.
Claim 11
Dependent Claim
16 words
A curable composition as defined in claim 1 wherein the polyepoxide is triglycidyl ether of p-aminophenol.
Claim 12
Dependent Claim
10 words
The cured product of the composition defined in claim 2.
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) | 1975-09-12 | 1976-03-13 | 1976-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-12 | 1980-03-13 | 1980-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-12 | 1984-03-13 | 1984-09-12 | $7700.00 | Window Closed / Lapsed |