US3235589A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid carboxy-terminated polymers and preparation thereof with dicarboxylic acid peroxides
Assignee: ATK Launch Systems LLC
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Filing: 1961-09-25
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Granted: 1966-02-15
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Expires: 1981-09-25
Abstract
No abstract record available.
Inventors
- 👤 Morris B Berenbaum
- 👤 George F Bulbenko
- 👤 Riad H Gobran
- 👤 Robert F Hoffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:16
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
163 words
THE METHOD OF MAKING A CARBOXY-TERMINATED POLYMER OF A MONOMER SELECTED FROM THE GROUP CONSISTING OF BUTADIENE, ISOPRENE, A MIXTURE OF BUTADIENE AND ISOPRENE, A MIXTURE OF BUTADIENE WITH UP TO 35 PERCENT BY WEIGHT OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF STYRENE AND ACRRYLONITRILE, AND A MIXTURE OF ISOPRENE WITH UP TO 35 PERCENT BY WEIGHT OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF STYRENE AND ACRYLONITRILE, SAID POLYMER HAVING AN AVERAGE MOLECULAR WEIGHT BETWEEN ABOUT 500 AND ABOUT 10,000C, WHICH METHOD CONSISTS ESSENTIALLY OF POLYMERIZING SAID MONOMER AT A TEMPERATURE FROM ABOUT 60*C. TO ABOUT 130*C. IN THE PRESENCE OF AN ALKYLENE DICARBOXYLIC ACID PEROXIDE INITIATOR BY ADDING SAID INITIATOR TO SAID MONOMER IN A VARIABLE NON-LINEAR FASHION TO MAINTAIN THE RATIO M:$$ AT A SUBSTANTIALLY CONSTANT VALUE, WHERE M IS THE CONCENTRATION OF MONOMER IN THE POLYMERIZING MIXTURE, IN MOLES PER LITER, AND C IS THE CONCENTRATION OF INITIATOR IN THE POLYMERIZING MIXTURE, IN MOLES PER LITER.
Claim 2
Independent Claim
163 words
THE METHOD OF MAKING A CARBOXY-TERMINATED POLYMER OF A MONOMER SELECTED FROM THE GROUP CONSISTING OF BUTADIENE, ISOPRENE, A MIXTURE OF BUTADIENE AND ISOPRENE, A MIXTURE OF BUTADIENE WITH UP TO 35 PERCENT BY WEIGHT OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF STYRENE AND ACRRYLONITRILE, AND A MIXTURE OF ISOPRENE WITH UP TO 35 PERCENT BY WEIGHT OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF STYRENE AND ACRYLONITRILE, SAID POLYMER HAVING AN AVERAGE MOLECULAR WEIGHT BETWEEN ABOUT 500 AND ABOUT 10,000C, WHICH METHOD CONSISTS ESSENTIALLY OF POLYMERIZING SAID MONOMER AT A TEMPERATURE FROM ABOUT 60*C. TO ABOUT 130*C. IN THE PRESENCE OF AN ALKYLENE DICARBOXYLIC ACID PEROXIDE INITIATOR BY ADDING SAID INITIATOR TO SAID MONOMER IN A VARIABLE NON-LINEAR FASHION TO MAINTAIN THE RATIO M:$$ AT A SUBSTANTIALLY CONSTANT VALUE, WHERE M IS THE CONCENTRATION OF MONOMER IN THE POLYMERIZING MIXTURE, IN MOLES PER LITER, AND C IS THE CONCENTRATION OF INITIATOR IN THE POLYMERIZING MIXTURE, IN MOLES PER LITER.
Claim 3
Dependent Claim
149 words
A POLYMER OF A MONOMER SELECTED FROM THE GROUP CONSISTING OF BUTADIENE, ISOPRENE, A MIXTURE OF BUTADIENE AND ISOPRENE, A MIXTURE OF BUTADIENE WITH UP TO 35 PERCENT BY WEIGHT OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF STYRENE AND ACRYLONITRILE, AND A MIXTURE OF ISOPRENE WITH UP TO 35 PERCENT BY WEIGHT OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF STYRENE AND ACRYLONITRILE, SAID POLYMER HAVING AN AVERAGE MOLECULAR WEIGHT BETWEEN ABOUT 500 AND ABOUT 1000 AND A NARROW MOLECULAR WEIGHT DISTRIBUTION SUCH THAT AT LEAST 60 PERCENT OF THE PRODUCT HAS A MOLECULAR WEIGHT WITHIN $33 1/3 PERCENT OF THE AVERAGE MOLECULAR WEIGHT, SAID POLYMER FURTHER HAVING A VISCOSITY BETWEEN ABOUT 50 TO ABOUT 2,000 POISES, THE MOLECULES OF SAID POLYMER BEING SUBSTANTIALLY ALL TERMINATED BY CARBOXYL TERMINALS ABOUT 70 PERCENT OF WHICH ARE JOINED BY A HYDROCARBON CHAIN TO THE BALANCE OF THE POLYMER.
Claim 4
Dependent Claim
149 words
A POLYMER OF A MONOMER SELECTED FROM THE GROUP CONSISTING OF BUTADIENE, ISOPRENE, A MIXTURE OF BUTADIENE AND ISOPRENE, A MIXTURE OF BUTADIENE WITH UP TO 35 PERCENT BY WEIGHT OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF STYRENE AND ACRYLONITRILE, AND A MIXTURE OF ISOPRENE WITH UP TO 35 PERCENT BY WEIGHT OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF STYRENE AND ACRYLONITRILE, SAID POLYMER HAVING AN AVERAGE MOLECULAR WEIGHT BETWEEN ABOUT 500 AND ABOUT 1000 AND A NARROW MOLECULAR WEIGHT DISTRIBUTION SUCH THAT AT LEAST 60 PERCENT OF THE PRODUCT HAS A MOLECULAR WEIGHT WITHIN $33 1/3 PERCENT OF THE AVERAGE MOLECULAR WEIGHT, SAID POLYMER FURTHER HAVING A VISCOSITY BETWEEN ABOUT 50 TO ABOUT 2,000 POISES, THE MOLECULES OF SAID POLYMER BEING SUBSTANTIALLY ALL TERMINATED BY CARBOXYL TERMINALS ABOUT 70 PERCENT OF WHICH ARE JOINED BY A HYDROCARBON CHAIN TO THE BALANCE OF THE 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) | 1969-02-14 | 1969-08-16 | 1970-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-14 | 1973-08-16 | 1974-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-14 | 1977-08-16 | 1978-02-15 | $7700.00 | Window Closed / Lapsed |