US2928807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Curing of polyepoxides
Assignee: Celanese Coatings Co
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Filing: 1956-10-08
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Granted: 1960-03-15
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Expires: 1976-10-08
Abstract
No abstract record available.
Inventors
- 👤 William J Belanger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:28
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
168 words
IN THE PROCESS FOR RESINIFYING AND CURING A GLYCIDYL POLYETHER OF A POLYHYDRIC COMPOUND OF THE GROUP CONSISTING OLF POLYHYDRIC ALCOHOLS AND PHENOLS HAVING AT LEAST TWO HYDROXYL GROUPS, SAID GYLCIDYL POLYETHER HAVING AN EPOXY EQUILAVENCY GREATER THAN ONE, WHEREIN THE GLYCIDYL POLYETHER AND POLCARBOXYLIC ACID ANHYDRIDE ARE MIXED AND HEAT REACTED IN A RATIO OF 0.5 TO 1 ANHYDRIDE EQUIVALENT PER EPOXIDE EQUIVALENT, THE IMPROVEMENT WHICH COMPRISES HEAT REACTING THE GLYCIDYL POLYETHER AND THE POLUCARBOXYLIC ACID ANHYDRIDE AND ADMIXING AS AN ACCELARATOR FOR THE REACTION FROM 0.01 PERCENT TO 10 PERCENT OF AN ACTIVATOR, BASED ON THE POLYETHER-ANHYDRIDE MIXTURE, CONSISTING OF A QUATERNARY AMMONIUM SALT SELECTED FROM THE GROUP CONSISTING OF TETRAALKYL, ARYL TRIALKYL, AND ALKARYL TRIALKYL AMMONIUM SALTS OF STRONG ACIDS WHEREIN THE ARYL, ALKARYL AND ALKAYL SUBSTITUENTS HAVE NO MORE THAN EIGHT CARBON ATOMS, CONSIDERING AN EPOXIDE EQUIVALENT AS THE WEIGHT IN GRAMS OF GLYCIDYL POLYETHER PER EPOXIDE GROUP, AND AN ANHYDRIDE EQUIVALENT AS THE WEIGHT IN GRAMS OF POLYCARBOXYLIC AND ANHYDRIDE PER ANHYDRIDE GROUP.
Claim 2
Dependent Claim
168 words
IN THE PROCESS FOR RESINIFYING AND CURING A GLYCIDYL POLYETHER OF A POLYHYDRIC COMPOUND OF THE GROUP CONSISTING OLF POLYHYDRIC ALCOHOLS AND PHENOLS HAVING AT LEAST TWO HYDROXYL GROUPS, SAID GYLCIDYL POLYETHER HAVING AN EPOXY EQUILAVENCY GREATER THAN ONE, WHEREIN THE GLYCIDYL POLYETHER AND POLCARBOXYLIC ACID ANHYDRIDE ARE MIXED AND HEAT REACTED IN A RATIO OF 0.5 TO 1 ANHYDRIDE EQUIVALENT PER EPOXIDE EQUIVALENT, THE IMPROVEMENT WHICH COMPRISES HEAT REACTING THE GLYCIDYL POLYETHER AND THE POLUCARBOXYLIC ACID ANHYDRIDE AND ADMIXING AS AN ACCELARATOR FOR THE REACTION FROM 0.01 PERCENT TO 10 PERCENT OF AN ACTIVATOR, BASED ON THE POLYETHER-ANHYDRIDE MIXTURE, CONSISTING OF A QUATERNARY AMMONIUM SALT SELECTED FROM THE GROUP CONSISTING OF TETRAALKYL, ARYL TRIALKYL, AND ALKARYL TRIALKYL AMMONIUM SALTS OF STRONG ACIDS WHEREIN THE ARYL, ALKARYL AND ALKAYL SUBSTITUENTS HAVE NO MORE THAN EIGHT CARBON ATOMS, CONSIDERING AN EPOXIDE EQUIVALENT AS THE WEIGHT IN GRAMS OF GLYCIDYL POLYETHER PER EPOXIDE GROUP, AND AN ANHYDRIDE EQUIVALENT AS THE WEIGHT IN GRAMS OF POLYCARBOXYLIC AND ANHYDRIDE PER ANHYDRIDE 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 |