US2947712A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epoxide resin compositions
Assignee: Celanese Coatings Co
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Filing: 1956-06-11
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Granted: 1960-08-02
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Expires: 1976-06-11
Abstract
No abstract record available.
Inventors
- 👤 William J Belanger
- 👤 John E Masters
- 👤 Darrell D Hicks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:00
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/14; C08G59/1433; C08G59/1438; C08G59/1444; C08G59/18; C08G59/40; C08G59/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
166 words
IN THE PROCESS FOR HEAT CURING GLYCIDYL POLYETHERS OF POLYHYDRIC COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF POLYHYDRIC ALCOHOLS AND PHENOLS HAVING AT LEAST TWO PHENOLIC HYDROXYL GROUPS, SAID GLYCIDYL POLYETHER CONTAINING MORE THAN ONE EPOXIDE GROUP PER MOLECULE, AND HAVING AN EPOXIDE EQUIVALENT BELOW 1000, WITH POLYCARBOXYLIC ACID ANHYDRIDES WHEREIN A RATIO OF TWO ANHYDRIDE EQUIVALENTS TO TWO EPOXIDE EQUIVALENTS IS EMPLOYED, THE IMPROVEMENT WHICH COMPRISES INCORPORATING 0.01 TO 0.8 EQUIVALENTS OF A MONOHYDRIC ALCOHOL IN THE GLYCIDYL POLYETHER-ANHYDRIDE, MIXTURE PRIOR TO EFFECTING THE CURER, AND HEATING THE MIXTURE WHEREIN THE ANHYDRIDE GROUPS REACT WITH HYDROXYL GROUPS RESULTING IN CARBOXYL GROUPS WHICH IN TURN REACT WITH EPOXIDE GROUPS OF THE GLYCIDYL POLYETHER TO FORM A CURED COMPOSITION, CONSIDERING AN EPOXIDE EQUIVALENT AS THE WEIGHT IN GRAMS OF GLYCIDYL POLYETHER PER EPOXIDE GROUP, AND EQUIVALENT OF A MONOHYDRIC ALCOHOL AS THE WEIGHT IN GRAMS OF ONE MOL OF THE MONOHYDRIC ALCOHOL AND AN ANHYDRIDE EQUIVALENT AS THE WEIGHT OF ACID ANHYDRIDE IN GRAMS PER ANHYDRIDE GROUP.
Claim 2
Dependent Claim
166 words
IN THE PROCESS FOR HEAT CURING GLYCIDYL POLYETHERS OF POLYHYDRIC COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF POLYHYDRIC ALCOHOLS AND PHENOLS HAVING AT LEAST TWO PHENOLIC HYDROXYL GROUPS, SAID GLYCIDYL POLYETHER CONTAINING MORE THAN ONE EPOXIDE GROUP PER MOLECULE, AND HAVING AN EPOXIDE EQUIVALENT BELOW 1000, WITH POLYCARBOXYLIC ACID ANHYDRIDES WHEREIN A RATIO OF TWO ANHYDRIDE EQUIVALENTS TO TWO EPOXIDE EQUIVALENTS IS EMPLOYED, THE IMPROVEMENT WHICH COMPRISES INCORPORATING 0.01 TO 0.8 EQUIVALENTS OF A MONOHYDRIC ALCOHOL IN THE GLYCIDYL POLYETHER-ANHYDRIDE, MIXTURE PRIOR TO EFFECTING THE CURER, AND HEATING THE MIXTURE WHEREIN THE ANHYDRIDE GROUPS REACT WITH HYDROXYL GROUPS RESULTING IN CARBOXYL GROUPS WHICH IN TURN REACT WITH EPOXIDE GROUPS OF THE GLYCIDYL POLYETHER TO FORM A CURED COMPOSITION, CONSIDERING AN EPOXIDE EQUIVALENT AS THE WEIGHT IN GRAMS OF GLYCIDYL POLYETHER PER EPOXIDE GROUP, AND EQUIVALENT OF A MONOHYDRIC ALCOHOL AS THE WEIGHT IN GRAMS OF ONE MOL OF THE MONOHYDRIC ALCOHOL AND AN ANHYDRIDE EQUIVALENT AS THE WEIGHT OF ACID ANHYDRIDE IN GRAMS 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) | 1963-08-02 | 1964-02-01 | 1964-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-02 | 1968-02-01 | 1968-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-02 | 1972-02-01 | 1972-08-02 | $7700.00 | Window Closed / Lapsed |