US3239580A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elastomeric epoxy resins
Assignee: Dow Chemical Co
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Filing: 1962-03-19
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Granted: 1966-03-08
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Expires: 1982-03-19
Abstract
No abstract record available.
Inventors
- 👤 Elmer L Pendleton
- 👤 John C Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:27
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/4007; C08G59/4014; C08G59/4028; C08G18/00; C08G18/06; C08G18/28; C08G18/2805; C08G18/2815; C08G18/2845; C08G59/02; C08G59/14; C08G59/1433; C08G59/1438; C08G59/145; C08G59/20; C08G59/22; C08G59/28
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
159 words
THE METHOD OF MODIFYING A MONOGLYCIDYL HYDROXY ETHER HAVING ATERMINAL HYDROXYL GROUP INHERENTLY PRESENT IN ADMIXTURE WITH DIGLYCIDYL ETHERS PREPARED BY EPOXIDIZING OXYALKYLENE GLYCOLS HAVING FROM 2 TO ABOUT 240 CARBON ATOMS PER MOLECULE IN THE OXYALKYLENE PORTION THEREOF, AND HAVING SUBSTANTIALLY NO HYDROXY GROUPS ON THE DIGLYCIDYL ETHER, TO INCREASE THE TERMINAL OXIRANE FUNCTIONALITY THEREOF BY CONVERTING HYDROXYL GROUPS OF THE MONOGLYCIDYL HYDROXY ETHERS, THE PRESSENCE OF WHICH IMPAIRS THE STRENGTH AND ELONGATION PROPERTIES OF THE DIGLYCIDYL ETHERS WHEN CURED, TO A RESIN CURABLE TO A HIGHSTRENGTH FLEXIBLE DURABLE COMPONENT, WHICH CONSISTS ESSENTIALLY OF ADMIXING WITH SAID MIXTURE OF MONOGLYCIDYL HYDROXY AND DIGLYCIDYL ETHERS, AN ORGANIC DIISOCYANATE IN AN AMOUNT SUFFICIENT TO PROVIDE BETWEEN ABOUT 0.8 AND ABOUT 2.5 WEIHT EQUIVALENTS OF NCO GROUPS PER WEIGHT EQUIVALENT OF OH GROUPS ON SAID MONOGLYCIDYLL HYDROXY ETHERS, AND HEATING THE RESULTING MIXTURE FOR FROM ABOUT 0.25 TO ABOUT 5 HOURS AT A TEMPERATURE BETWEEN ABOUT 80* C. AND ABOUT 130*C.
Claim 2
Independent Claim
159 words
THE METHOD OF MODIFYING A MONOGLYCIDYL HYDROXY ETHER HAVING ATERMINAL HYDROXYL GROUP INHERENTLY PRESENT IN ADMIXTURE WITH DIGLYCIDYL ETHERS PREPARED BY EPOXIDIZING OXYALKYLENE GLYCOLS HAVING FROM 2 TO ABOUT 240 CARBON ATOMS PER MOLECULE IN THE OXYALKYLENE PORTION THEREOF, AND HAVING SUBSTANTIALLY NO HYDROXY GROUPS ON THE DIGLYCIDYL ETHER, TO INCREASE THE TERMINAL OXIRANE FUNCTIONALITY THEREOF BY CONVERTING HYDROXYL GROUPS OF THE MONOGLYCIDYL HYDROXY ETHERS, THE PRESSENCE OF WHICH IMPAIRS THE STRENGTH AND ELONGATION PROPERTIES OF THE DIGLYCIDYL ETHERS WHEN CURED, TO A RESIN CURABLE TO A HIGHSTRENGTH FLEXIBLE DURABLE COMPONENT, WHICH CONSISTS ESSENTIALLY OF ADMIXING WITH SAID MIXTURE OF MONOGLYCIDYL HYDROXY AND DIGLYCIDYL ETHERS, AN ORGANIC DIISOCYANATE IN AN AMOUNT SUFFICIENT TO PROVIDE BETWEEN ABOUT 0.8 AND ABOUT 2.5 WEIHT EQUIVALENTS OF NCO GROUPS PER WEIGHT EQUIVALENT OF OH GROUPS ON SAID MONOGLYCIDYLL HYDROXY ETHERS, AND HEATING THE RESULTING MIXTURE FOR FROM ABOUT 0.25 TO ABOUT 5 HOURS AT A TEMPERATURE BETWEEN ABOUT 80* C. AND ABOUT 130*C.
Claim 3
Dependent Claim
85 words
AN IMPROVED RESIN MADE BY REACTING A DIGLYCIDYL ETHER OF A POLYOXYALKYLENE GLYCOL HAVING FROM 2 TO ABOUT 240 CARBON ATOMS PER MOLECULE IN THE OXYALKYLENE PORTION THEREOF, AND HAVING SUBSTANTIALLY NO HYDROXY GROUPS ON THE DIGLYCIDYL ETHER PRESENT AN DCONTAINING SOME MONOGLYCIDYL ETHER HAVING TERMINAL HYDROXYL GROUPS WITH A DIISOCYANATE IN AN AMOUNT SUFFICIENT TO PROVIDE BETWEEN ABOUT 0.8 AND 2.5 ISOCYANATE GROUPS PER TERMINAL HYDROXYL GROUP AT A TEMPERATURE OF BETWEEN ABOUT 80* AND 130* C. FOR FROM ABOUT 0.25 AND 5 HOURS.
Claim 4
Dependent Claim
85 words
AN IMPROVED RESIN MADE BY REACTING A DIGLYCIDYL ETHER OF A POLYOXYALKYLENE GLYCOL HAVING FROM 2 TO ABOUT 240 CARBON ATOMS PER MOLECULE IN THE OXYALKYLENE PORTION THEREOF, AND HAVING SUBSTANTIALLY NO HYDROXY GROUPS ON THE DIGLYCIDYL ETHER PRESENT AN DCONTAINING SOME MONOGLYCIDYL ETHER HAVING TERMINAL HYDROXYL GROUPS WITH A DIISOCYANATE IN AN AMOUNT SUFFICIENT TO PROVIDE BETWEEN ABOUT 0.8 AND 2.5 ISOCYANATE GROUPS PER TERMINAL HYDROXYL GROUP AT A TEMPERATURE OF BETWEEN ABOUT 80* AND 130* C. FOR FROM ABOUT 0.25 AND 5 HOURS.
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) | 1969-03-07 | 1969-09-06 | 1970-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-07 | 1973-09-06 | 1974-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-07 | 1977-09-06 | 1978-03-08 | $7700.00 | Window Closed / Lapsed |