US3978027A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for reacting a phenol with an epoxy compound
Assignee: Shell USA Inc
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Filing: 1975-05-07
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Granted: 1976-08-31
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Expires: 1995-05-07
Abstract
Abstract A process for reacting a phenol with an epoxy-containing compound is disclosed. This process comprises reacting a polyepoxide having more than one vic-epoxy group with a phenol in the presence of a potassium iodide catalyst. The products resulting from this process are also disclosed.
Inventors
- 👤 Clifford D. Marshall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:25
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/14; C08G59/1433; C08G59/1438; C08G59/02; C08G59/04; C08G59/06; C08G59/066; C08G59/18; C08G59/68
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
105 words
In the process for producing polepoxide resins having a weight per epoxide of between about 2,000 and about 4,000 by reacting a liquid diglycidyl ether of 2,2-bis(4-hydroxyphenyl)propane having a weight per epoxide of between about 140 and about 500 and a saponifiable chlorine content of between about 0.1% weight and about 1.0% weight with 2,2-bis(4-hydroxyphenyl)propane in the presence of a potassium iodide catalyst, the improvement wherein said liquid diglycidyl ether of 2,2-bis(4-hydroxyphenyl)propane and said 2,2-bis(4-hydroxyphenyl)propane are contacted at a temperature of between about 250°F and about 400°F for between about 15 minutes and about 60 minutes prior to the addition of the potassium iodide catalyst.
Claim 2
Dependent Claim
105 words
In the process for producing polepoxide resins having a weight per epoxide of between about 2,000 and about 4,000 by reacting a liquid diglycidyl ether of 2,2-bis(4-hydroxyphenyl)propane having a weight per epoxide of between about 140 and about 500 and a saponifiable chlorine content of between about 0.1% weight and about 1.0% weight with 2,2-bis(4-hydroxyphenyl)propane in the presence of a potassium iodide catalyst, the improvement wherein said liquid diglycidyl ether of 2,2-bis(4-hydroxyphenyl)propane and said 2,2-bis(4-hydroxyphenyl)propane are contacted at a temperature of between about 250°F and about 400°F for between about 15 minutes and about 60 minutes prior to the addition of the potassium iodide catalyst.
Claim 3
Dependent Claim
27 words
The process as in claim 1 wherein the amount of potassium iodide catalyst employed is between about 0.002% and about 0.2% by weight of the total reactants.
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) | 1979-08-31 | 1980-03-01 | 1980-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-31 | 1984-03-01 | 1984-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-31 | 1988-03-01 | 1988-08-31 | $7700.00 | Window Closed / Lapsed |