US2927100A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing a water soluble polymer from a water insoluble conjugated diene polymer
Assignee: Phillips Petroleum Co
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Filing: 1957-03-21
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Granted: 1960-03-01
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Expires: 1977-03-21
Abstract
No abstract record available.
Inventors
- 👤 Peter J Canterino
- 👤 Lon T Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:48
CPC Classifications
C; C08; C08C; C08C19/00; C08C19/04; C08C19/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
152 words
THE METHOD OF PREPARING A WATER SOLUBLE POLYMER FROM A WATER INSOLUBLE DIENE POLYMER SELECTED FROM THE GROUP CONSISTING OF HOMOPOLYMERS AND COPOLYMERS OF A CONJUGATED DIENE, THE COPOLYMERS BEING ESSENTIALLY FREE FROM FREE CARBOXYL GROUP AND THE COPOLYMERS CONTAINING AT LEAST 50 PERCENT BY WEIGHT OF THE DIENE CONSTITUENTS, COMPRISING CONTACTING SAID POLYMER WITH HYDROGEN PEROXIDE IN THE PRESENCE OF AN ACIDIC CATALYST, MAINTAINING THE TEMPERATURE NOT OVER 45*C. DURING THE REACTION AND, AFTER A TIME OF AT LEAST ONE HOUR AND BEFORE THE VISCOSITY OF THE REACTION MIXTURE INCREASES TO A VALUE OF OVER Z-5 ADDING AN ALCOHOLIC SOLVENT COMPATIBLE WITH THE REACTION MIXTURE IN AN AMOUNT OF 10 TO 100 PERCENT BY VOLUME BASED ON THE REACTION MIXTURE, HEATING THE MIXTURE AT A TEMPERATURE OF AT LEAST 50*C. FOR AT LEAST ONE HOUR, ADDING SIFFICIENT ALKALINE MATERIAL TO PROVIDE AN ALKALINE SOLUTION, AND RECOVERING THE RESULTING WATER SOLUBLE POLYMER.
Claim 2
Independent Claim
152 words
THE METHOD OF PREPARING A WATER SOLUBLE POLYMER FROM A WATER INSOLUBLE DIENE POLYMER SELECTED FROM THE GROUP CONSISTING OF HOMOPOLYMERS AND COPOLYMERS OF A CONJUGATED DIENE, THE COPOLYMERS BEING ESSENTIALLY FREE FROM FREE CARBOXYL GROUP AND THE COPOLYMERS CONTAINING AT LEAST 50 PERCENT BY WEIGHT OF THE DIENE CONSTITUENTS, COMPRISING CONTACTING SAID POLYMER WITH HYDROGEN PEROXIDE IN THE PRESENCE OF AN ACIDIC CATALYST, MAINTAINING THE TEMPERATURE NOT OVER 45*C. DURING THE REACTION AND, AFTER A TIME OF AT LEAST ONE HOUR AND BEFORE THE VISCOSITY OF THE REACTION MIXTURE INCREASES TO A VALUE OF OVER Z-5 ADDING AN ALCOHOLIC SOLVENT COMPATIBLE WITH THE REACTION MIXTURE IN AN AMOUNT OF 10 TO 100 PERCENT BY VOLUME BASED ON THE REACTION MIXTURE, HEATING THE MIXTURE AT A TEMPERATURE OF AT LEAST 50*C. FOR AT LEAST ONE HOUR, ADDING SIFFICIENT ALKALINE MATERIAL TO PROVIDE AN ALKALINE SOLUTION, AND RECOVERING THE RESULTING WATER SOLUBLE POLYMER.
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) | 1963-03-01 | 1963-08-31 | 1964-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-01 | 1967-08-31 | 1968-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-01 | 1971-08-31 | 1972-03-01 | $7700.00 | Window Closed / Lapsed |