Patent US2928794A successfully refreshed from Google Patents.
US2928794A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Curing of polyepoxides
Assignee: Celanese Coatings Co
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Filing: 1956-12-05
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Granted: 1960-03-15
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Expires: 1976-12-05
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
2026-11-04 05:43
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/50; C08L; C08L63/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
169 words
IN THE PROCESS FOR RESINIFYING AND CURING A GLYCIDYL POLYETHER OF A POLHYDRIC COMPOUND OF THE GROUP CONSISTING OF PHENOLS AND POLYHYDRIC ALCOHOLS, SAID GLYCIDYL POLYEHTER HAVING AN EPOXY EQUIFALENCY GREATER THAN ONE, WHEREIN THE GLYCIDYL POLYETHER AND AN AMINE-CURING AGENT SELECTED FROM THE GROUP CONSISTING OF PRIMARY AND SECONDARY AMINES ARE REACTED AT AN ELEVATED TEMPERATURE BELOW ABOUT 200*C., AND IN A RATIO OF 0.2 TO 1.5 AMINE EQUIVALENTS PER EPOXIDE EQUIVALENT, THE IMPROVEMENT WHICH COMPRISES REACTING THE GLYCIDYL POLYETHER AND THE AMINE IN THE PRESENCE OF FROM 0.1 PERCENT TO 10 PERCENT OF AN ACTIVATOR FOR THE AMINE CURING AGENT COMPRISING A QUATERNARY AMMOUIUM SALT SELECTED FROM THE GROUP CONSISTING OF TETRAALYKL, ARYL TRIALKYL AND ALKARYL TRIALKARYL AMMONIUM SALTS OF STRONG ACIDS, WHEREIN THE ARYL, ALKARYL AND ALKYL SUBSTITUENTS EACH HAVE NO MORE THAN EIGHT CARBON ATOMS, CONSIDERING AN EPOXIDE EQUIVALENT AS THE WEIGHT IN GRAMS OF GLYCIDYL POLYETHER PER EPOXIDE GROUP AND AN AMINE EQUIVALENT AS THE WEIGHT IN GRAMS OF AMINE PER AMINO-SUBSTITUTED HYDROGEN ATOM.
Claim 2
Dependent Claim
169 words
IN THE PROCESS FOR RESINIFYING AND CURING A GLYCIDYL POLYETHER OF A POLHYDRIC COMPOUND OF THE GROUP CONSISTING OF PHENOLS AND POLYHYDRIC ALCOHOLS, SAID GLYCIDYL POLYEHTER HAVING AN EPOXY EQUIFALENCY GREATER THAN ONE, WHEREIN THE GLYCIDYL POLYETHER AND AN AMINE-CURING AGENT SELECTED FROM THE GROUP CONSISTING OF PRIMARY AND SECONDARY AMINES ARE REACTED AT AN ELEVATED TEMPERATURE BELOW ABOUT 200*C., AND IN A RATIO OF 0.2 TO 1.5 AMINE EQUIVALENTS PER EPOXIDE EQUIVALENT, THE IMPROVEMENT WHICH COMPRISES REACTING THE GLYCIDYL POLYETHER AND THE AMINE IN THE PRESENCE OF FROM 0.1 PERCENT TO 10 PERCENT OF AN ACTIVATOR FOR THE AMINE CURING AGENT COMPRISING A QUATERNARY AMMOUIUM SALT SELECTED FROM THE GROUP CONSISTING OF TETRAALYKL, ARYL TRIALKYL AND ALKARYL TRIALKARYL AMMONIUM SALTS OF STRONG ACIDS, WHEREIN THE ARYL, ALKARYL AND ALKYL SUBSTITUENTS EACH HAVE NO MORE THAN EIGHT CARBON ATOMS, CONSIDERING AN EPOXIDE EQUIVALENT AS THE WEIGHT IN GRAMS OF GLYCIDYL POLYETHER PER EPOXIDE GROUP AND AN AMINE EQUIVALENT AS THE WEIGHT IN GRAMS OF AMINE PER AMINO-SUBSTITUTED HYDROGEN ATOM.
References Cited (Backward Citations)
US2752269A
Cited
US2768992A
Cited
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 |