US2928803A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Curing of polyepoxides
Assignee: Celanese Coatings Co
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Filing: 1956-10-05
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Granted: 1960-03-15
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Expires: 1976-10-05
Abstract
No abstract record available.
Inventors
- 👤 William J Belanger
- 👤 Jr Harold G Cooke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:23
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/50; C08G59/42; C08G59/62; C08G59/621; C08G59/68; C08G59/686
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
162 words
IN THE PROCESS FOR RESINIFYING AND CURING A GLYCIDYL POLYETHER OF A POLYHYDRIC COMPOUND OF THE GROUP CONSISTING SISTING OF POLYHYDRIC PHENOLS AND POLYHYDRIC ALCOHOLS, SAID GLYCIDYL POLYETHER HAVING AN EPOXY EQUILAVENCY GREATER THAN ONE, WHEREIN THE GLYCIDYL POLYETHER AND A POLYHYDRIC PHENOL ARE MIXED AND HEAT REACTED AND IN A RATIO OF 0.1 TO 1 PHENOL EQUIVALENT PER EPOXIDE EQUIVALENT, THE IMPROVEMENT WHICH COMPRISES HEAT REACTING THE GLYCIDYL POLYETHER AND THE POLYHYDRIC PHENOL AND ADMIXING AS AN ACCELERATOR FOR THE REACTION FROM 0.1 10 PERCENT BASDED ON THE GLYCIDYL POLYETHER-PHENOL MIXTURE OF AN ACTIVATOR CONSISTING OF A QUATERNARY AMMONIUM SALT SELECTED FROM THE GROUP CONSISTING OF TETRAALKYL, ARYL TRIALKLY AND ALKARYL TRIALKYL AMMONIUM SALTS OF STRONG ACIDS WHEREIN THE ARYL, ALKARYL AND ALKYL SUBSTITUENTS HAVE NO MORE THAN EIGHT CARBON ATOMS, CONSIDERING AN EPOXIDE EQUILAVENT AS THE WEIGHT IN GRAMS OF GLYCIDYL POLYETHER PER EPOXIDE GROUP, AND AN EQUIVALENT PHENOL AS THE WEIGHT IN GRAMS OF PHENOL PER PHENOLIC HYDROXYL GROUP.
Claim 2
Dependent Claim
162 words
IN THE PROCESS FOR RESINIFYING AND CURING A GLYCIDYL POLYETHER OF A POLYHYDRIC COMPOUND OF THE GROUP CONSISTING SISTING OF POLYHYDRIC PHENOLS AND POLYHYDRIC ALCOHOLS, SAID GLYCIDYL POLYETHER HAVING AN EPOXY EQUILAVENCY GREATER THAN ONE, WHEREIN THE GLYCIDYL POLYETHER AND A POLYHYDRIC PHENOL ARE MIXED AND HEAT REACTED AND IN A RATIO OF 0.1 TO 1 PHENOL EQUIVALENT PER EPOXIDE EQUIVALENT, THE IMPROVEMENT WHICH COMPRISES HEAT REACTING THE GLYCIDYL POLYETHER AND THE POLYHYDRIC PHENOL AND ADMIXING AS AN ACCELERATOR FOR THE REACTION FROM 0.1 10 PERCENT BASDED ON THE GLYCIDYL POLYETHER-PHENOL MIXTURE OF AN ACTIVATOR CONSISTING OF A QUATERNARY AMMONIUM SALT SELECTED FROM THE GROUP CONSISTING OF TETRAALKYL, ARYL TRIALKLY AND ALKARYL TRIALKYL AMMONIUM SALTS OF STRONG ACIDS WHEREIN THE ARYL, ALKARYL AND ALKYL SUBSTITUENTS HAVE NO MORE THAN EIGHT CARBON ATOMS, CONSIDERING AN EPOXIDE EQUILAVENT AS THE WEIGHT IN GRAMS OF GLYCIDYL POLYETHER PER EPOXIDE GROUP, AND AN EQUIVALENT PHENOL AS THE WEIGHT IN GRAMS OF PHENOL PER PHENOLIC HYDROXYL GROUP.
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) | 1963-03-15 | 1963-09-14 | 1964-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-15 | 1967-09-14 | 1968-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-15 | 1971-09-14 | 1972-03-15 | $7700.00 | Window Closed / Lapsed |