US2909496A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reaction products of polyepoxides and monomeric partial esters of polyhydric alcohols with maleic anhydrideunsaturated organic acid adducts, and methods and compositionsfor producing the same
Assignee: Celanese Coatings Co
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Filing: 1955-07-19
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Granted: 1959-10-20
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Expires: 1975-07-19
Abstract
No abstract record available.
Inventors
- 👤 Jr Harold G Cooke
- 👤 John E Masters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:50
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/42; C08G59/4292
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
186 words
THE METHOD OF CONVERTING EPOXIDE RESINS WHICH ARE GLYCIDYL POLYETHERS OF A MEMBER SELECTED FROM THE CLASS CONSISTING OF POLYHYDRIC PHENOLS AND POLYDRIC ALCOHOLS AND WHICH ARE FREE FROM REACTIVE GROUPS OTHER THAN EPOXY AND ALIPHATIC HYDROXYL GROUPS INTO CROSS-LINKED INSOLUBLE AND INFUSIBLE PRODUCTS, WHICH COMPRISES HEATING THE EPOXY COMPOUNDS TO A REACTION TEMPERATURE WITH A MONOMERIC PARTIAL ESTER OF A POLYHYDRIC ALCOHOL WITH ONE MOL, FOR EACH HYDROXYL GROUP OF STHE POLYDRIC ALCOHOL, OF A MALEIC ANYHYDRIDE UNSATURATED MONOCARBOXYLIC ACID ADDUCT HAVING AN ACID ANHYDRIDE GROUP AND A FREE CARBOXYL GROUP, SAID ADDUCT BEING AN ADDUCT OF MALEIC ANHYDRIDE, WITH AN UNSATURATED MONOCARBOXYLIC ACID SELECTED FROM THE CLASS CONSISTING OF ROSINACIDS AND DRYINGOIL FATTY ACIDS, AND SAID PARTIAL ESTER HAVING AT LEAST 4 CARBOXYL GROUPS, THE PROPORTIONS OF ADDUCT AND OF EPOXY COMPOUND BEING SUCH THAT THERE ARE FROM ABOUT 0.6 TO 2.85 EPOXY GROUPS IN THE EPOXY COMPOUND FOR EACH CARBOXYL GROUP OF THE PARTIAL ESTER, AND THE HEATING BEING AT A TEMPERATURE TO EFFECT CONVERSION AND CROSS LINKING OF THE EPOXY COMPOUND WITH THE PARTIAL ESTER TO FORM INSOLUBLE AND INFUSIBLE REACTON PRODUCTS.
Claim 2
Independent Claim
186 words
THE METHOD OF CONVERTING EPOXIDE RESINS WHICH ARE GLYCIDYL POLYETHERS OF A MEMBER SELECTED FROM THE CLASS CONSISTING OF POLYHYDRIC PHENOLS AND POLYDRIC ALCOHOLS AND WHICH ARE FREE FROM REACTIVE GROUPS OTHER THAN EPOXY AND ALIPHATIC HYDROXYL GROUPS INTO CROSS-LINKED INSOLUBLE AND INFUSIBLE PRODUCTS, WHICH COMPRISES HEATING THE EPOXY COMPOUNDS TO A REACTION TEMPERATURE WITH A MONOMERIC PARTIAL ESTER OF A POLYHYDRIC ALCOHOL WITH ONE MOL, FOR EACH HYDROXYL GROUP OF STHE POLYDRIC ALCOHOL, OF A MALEIC ANYHYDRIDE UNSATURATED MONOCARBOXYLIC ACID ADDUCT HAVING AN ACID ANHYDRIDE GROUP AND A FREE CARBOXYL GROUP, SAID ADDUCT BEING AN ADDUCT OF MALEIC ANHYDRIDE, WITH AN UNSATURATED MONOCARBOXYLIC ACID SELECTED FROM THE CLASS CONSISTING OF ROSINACIDS AND DRYINGOIL FATTY ACIDS, AND SAID PARTIAL ESTER HAVING AT LEAST 4 CARBOXYL GROUPS, THE PROPORTIONS OF ADDUCT AND OF EPOXY COMPOUND BEING SUCH THAT THERE ARE FROM ABOUT 0.6 TO 2.85 EPOXY GROUPS IN THE EPOXY COMPOUND FOR EACH CARBOXYL GROUP OF THE PARTIAL ESTER, AND THE HEATING BEING AT A TEMPERATURE TO EFFECT CONVERSION AND CROSS LINKING OF THE EPOXY COMPOUND WITH THE PARTIAL ESTER TO FORM INSOLUBLE AND INFUSIBLE REACTON PRODUCTS.
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) | 1962-10-19 | 1963-04-20 | 1963-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-19 | 1967-04-20 | 1967-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-19 | 1971-04-20 | 1971-10-20 | $7700.00 | Window Closed / Lapsed |