US3351673A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing composite epoxide resins
Assignee: Celanese Coatings Co
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Filing: 1965-08-02
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Granted: 1967-11-07
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Expires: 1985-08-02
Abstract
No abstract record available.
Inventors
- 👤 Herbert P Price
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:15
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/20; C08G59/32; C08G59/38; C08G59/02; C08G59/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A PROCESS FOR PREPARING COMPOSITE EPOXIDE RESINS WHICH COMPRISES REACTING CYANURIC ACID IN AN EXCESS OF EPICHLOROHYDRIN USING AN ORGANIC BASE AS CATALYST TO FORM POLYCHLOROHYDRIN DERIVATIVES OF CYANURIC ACID, ADDING TO AND DISSOLVING THEREIN A POLYEPOXIDE COMPOUND CONTAINING MORE THAN ONE VICINAL EPOXY GROUP PER MOLECULE AND BEING FREE FROM THE TRIAZINE RING STRUCTURE AND REACTING THE RESULTING SOLUTION WITH AN ALKALI METAL HYDROXIDE WHEREIN THE EPICHLOROHYDRIN IS PRESENT IN THE AMOUNT OF AT LEAST ABOUT 2 MOLS PER ACTIVE HYDROGEN EQUIVALENT OF THE CYANURIC ACID AND WHEREIN THE AMOUNT OF ALKALI METAL HYDROXIDE USED IS SUBSTANTIALLY EQUIVALENT TO THE ACTIVE HYDROGENS OF THE CYANURIC ACID ORIGINALLY PRESENT TO FORM A COMPOSITE EPOXIDE RESIN OF POLYGLYCIDYL ISOCYANURATE AND THE POLYEPOXIDE COMPOUND.
Claim 2
Dependent Claim
122 words
A PROCESS FOR PREPARING COMPOSITE EPOXIDE RESINS WHICH COMPRISES REACTING CYANURIC ACID IN AN EXCESS OF EPICHLOROHYDRIN USING AN ORGANIC BASE AS CATALYST TO FORM POLYCHLOROHYDRIN DERIVATIVES OF CYANURIC ACID, ADDING TO AND DISSOLVING THEREIN A POLYEPOXIDE COMPOUND CONTAINING MORE THAN ONE VICINAL EPOXY GROUP PER MOLECULE AND BEING FREE FROM THE TRIAZINE RING STRUCTURE AND REACTING THE RESULTING SOLUTION WITH AN ALKALI METAL HYDROXIDE WHEREIN THE EPICHLOROHYDRIN IS PRESENT IN THE AMOUNT OF AT LEAST ABOUT 2 MOLS PER ACTIVE HYDROGEN EQUIVALENT OF THE CYANURIC ACID AND WHEREIN THE AMOUNT OF ALKALI METAL HYDROXIDE USED IS SUBSTANTIALLY EQUIVALENT TO THE ACTIVE HYDROGENS OF THE CYANURIC ACID ORIGINALLY PRESENT TO FORM A COMPOSITE EPOXIDE RESIN OF POLYGLYCIDYL ISOCYANURATE AND THE POLYEPOXIDE COMPOUND.
References Cited (Backward Citations)
US2864805A
Cited
US2893978A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-06 | 1971-05-08 | 1971-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-06 | 1975-05-08 | 1975-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-06 | 1979-05-08 | 1979-11-07 | $7700.00 | Window Closed / Lapsed |