US2709690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epoxy resins esterified with drying oil fatty acids and phosphoric acid
Assignee: Shell Development Co
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Filing: 1952-05-19
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Granted: 1955-05-31
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Expires: 1972-05-19
Abstract
No abstract record available.
Inventors
- 👤 Eric S Narracott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:42
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/14; C08G59/1405; C08G59/1422; C08G59/1433; C08G59/1438; C08G59/1455; C08G59/1461; C08G59/1472; C08G59/1494
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
A PROCESS OF PREPARING A MIXED ESTER WHICH COMPRISES HEATING AND ESTERIFYING GLYCIDYL POLYETHER OF A POLYHYDRIC PHENOL HAVING A 1,2-EPOXY EQUIVALENCY GREATER THAN 1.0 AND CONTAINING ALTERNATING GLYCERYL RADICALS AND AROMATIC HYDROCARBON RADICALS OF THE PHENOL UNITED IN A CHAIN BY ETHER OXYGEN ATOMS WITH GLYCERYL RADICALS AT EACH END THEREOF, FIRST WITH A DRYING OIL FATTY ACID IN AMOUNT OF ABOUT 25% TO 65% OF THE EQUIVALENT QUANTITY NEEDED TO ESTERIFY COMPLETELY THE POLYETHER, SAID HEATING BEING CONTINUED WITH REMOVAL OF FORMED WATER UNTIL THE ESTER PRODUCT HAS AN ACID NUMBER OF LESS THAN 10 AND IS DEVOID OF EPOXY GROUPS, AND THEN FURTHER ESTERIFYING THE ESTER PRODUCT AS A SOLUTION IN AROMATIC HYDROCARBON SOLVENT WITH ABOUT AN ADDED 1% TO 3% OF ORTHOPHOSPHORIC ACID BASED UPON THE WEIGHT OF SAID ESTER PRODUCT.
Claim 2
Dependent Claim
135 words
A PROCESS OF PREPARING A MIXED ESTER WHICH COMPRISES HEATING AND ESTERIFYING GLYCIDYL POLYETHER OF A POLYHYDRIC PHENOL HAVING A 1,2-EPOXY EQUIVALENCY GREATER THAN 1.0 AND CONTAINING ALTERNATING GLYCERYL RADICALS AND AROMATIC HYDROCARBON RADICALS OF THE PHENOL UNITED IN A CHAIN BY ETHER OXYGEN ATOMS WITH GLYCERYL RADICALS AT EACH END THEREOF, FIRST WITH A DRYING OIL FATTY ACID IN AMOUNT OF ABOUT 25% TO 65% OF THE EQUIVALENT QUANTITY NEEDED TO ESTERIFY COMPLETELY THE POLYETHER, SAID HEATING BEING CONTINUED WITH REMOVAL OF FORMED WATER UNTIL THE ESTER PRODUCT HAS AN ACID NUMBER OF LESS THAN 10 AND IS DEVOID OF EPOXY GROUPS, AND THEN FURTHER ESTERIFYING THE ESTER PRODUCT AS A SOLUTION IN AROMATIC HYDROCARBON SOLVENT WITH ABOUT AN ADDED 1% TO 3% OF ORTHOPHOSPHORIC ACID BASED UPON THE WEIGHT OF SAID ESTER PRODUCT.
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) | 1958-05-30 | 1958-11-29 | 1959-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-30 | 1962-11-29 | 1963-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-30 | 1966-11-29 | 1967-05-31 | $7700.00 | Window Closed / Lapsed |