Patent US2829135A successfully refreshed from Google Patents.
US2829135A
Expired / Lapsed
US
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Epoxidized polybutadiene resin
Assignee: FMC Corp
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Filing: 1955-06-27
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Granted: 1958-04-01
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Expires: 1975-06-27
Abstract
No abstract record available.
Inventors
- 👤 Frank P Greenspan
- 👤 Jr Rupert E Light
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:42
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/02; C08G59/027; C08C; C08C19/00; C08C19/30; C08C19/34; C08C19/40; C08G59/18; C08G59/40; C08G59/42; C08G59/62; C08G59/621; C08L; C08L63/00; C08L63/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A METHOD FOR PRODUCTION OF THERMOSET RESINS WHICH COMPRISES EPOXIDIZING A POLYBUTADIENE CONTAINING AS POLYMER FORMING UNITS ONLY BUTADIENE, WITH AN AMOUNT OF A LIQUID LOWER ALIPHATIC PERACID CORRESPONDING TO AT LEAST 5% OF THE AMOUNT REQUIRED TO EPOXIDIZE ALL DOUBLE BONDS PRESENT IN SAID POLYBUTADIENE WITH A COMPOUND SETHE THUS EXPOXIDIZED POLYBUTADIENE WITH A COMPOUND SELECTED FROM THE GROUP CONSISTING OF DIBASIC CARBOXYLIC ACIDS AND THEIR ANHYDRIDES IN AN AMOUNT CORRESPONDING TO AT LEAST 10% OF THE AMOUNT REQUIRED FOR COMPLETE REACTION WITH THE EPOXIDIZED POLYBUTADIENE, AND HEATING THE RESULTING MIXTURE UNTIL A THERMOSTAT RESIN HAS BEEN FORMED.
Claim 2
Independent Claim
99 words
A METHOD FOR PRODUCTION OF THERMOSET RESINS WHICH COMPRISES EPOXIDIZING A POLYBUTADIENE CONTAINING AS POLYMER FORMING UNITS ONLY BUTADIENE, WITH AN AMOUNT OF A LIQUID LOWER ALIPHATIC PERACID CORRESPONDING TO AT LEAST 5% OF THE AMOUNT REQUIRED TO EPOXIDIZE ALL DOUBLE BONDS PRESENT IN SAID POLYBUTADIENE WITH A COMPOUND SETHE THUS EXPOXIDIZED POLYBUTADIENE WITH A COMPOUND SELECTED FROM THE GROUP CONSISTING OF DIBASIC CARBOXYLIC ACIDS AND THEIR ANHYDRIDES IN AN AMOUNT CORRESPONDING TO AT LEAST 10% OF THE AMOUNT REQUIRED FOR COMPLETE REACTION WITH THE EPOXIDIZED POLYBUTADIENE, AND HEATING THE RESULTING MIXTURE UNTIL A THERMOSTAT RESIN HAS BEEN FORMED.
References Cited (Backward Citations)
US2543419A
Cited
US2660563A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-31 | 1961-09-30 | 1962-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-31 | 1965-09-30 | 1966-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-31 | 1969-09-30 | 1970-04-01 | $7700.00 | Window Closed / Lapsed |