US2606893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Emulsion polymerization of vinylidene compounds in the presence of hydrazine-alkylenepolyamine compositions
Assignee: Phillips Petroleum Co
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Filing: 1950-06-15
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Granted: 1952-08-12
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Expires: 1970-06-15
Abstract
No abstract record available.
Inventors
- 👤 William B Reynolds
- 👤 John E Wicklatz
- 👤 Thomas J Kennedy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:44
CPC Classifications
C; C08; C08F; C08F4/00; C08F4/28; C08F4/32; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A PROCESS FOR THE PRODUCTION OF SYNTHETIC RUBBER, WHICH COMPRISES POLYMERIZING A MONOMERIC MATERIAL COMPRISING A MAJOR PORTION OF 1,3-BUTADIENE AND A MINOR PORTION OF STYRENE WHILE DISPERSED IN THE PRESENCE OF AN EMULSIFYING AGENT IN AN AQUEOUS MEDIUM HAVING A PH BETWEEN 9 AND 12 AT A POLYMERIZATION TEMERATURE BETWEEN 30 AND -40* C. IN THE PRESENCE OF A POLYMERIZATION CATALYST COMPOSITION COMPRISING 0.1 TO 10 MILLIMOLS OF A MONOHYDROPEROXIDE OF TERTBUTYLISOPROPYLBENZENE AND 0.02 TO 5 PARTS BY WEIGHT OF DIETHYLENETRIAMINE AND HYDRAZINE IN AN AMOUNT SUCH THAT THE MOLE RATIO OF HYDRAZINE TO DIETHYLENETRAIMINE IS 0.3:1 TO 5:1, SAID AMOUNTS BEING PER 100 PARTS BY WEIGHT OF SAID MONOMERIC MATERIAL.
Claim 2
Dependent Claim
112 words
A PROCESS FOR THE PRODUCTION OF SYNTHETIC RUBBER, WHICH COMPRISES POLYMERIZING A MONOMERIC MATERIAL COMPRISING A MAJOR PORTION OF 1,3-BUTADIENE AND A MINOR PORTION OF STYRENE WHILE DISPERSED IN THE PRESENCE OF AN EMULSIFYING AGENT IN AN AQUEOUS MEDIUM HAVING A PH BETWEEN 9 AND 12 AT A POLYMERIZATION TEMERATURE BETWEEN 30 AND -40* C. IN THE PRESENCE OF A POLYMERIZATION CATALYST COMPOSITION COMPRISING 0.1 TO 10 MILLIMOLS OF A MONOHYDROPEROXIDE OF TERTBUTYLISOPROPYLBENZENE AND 0.02 TO 5 PARTS BY WEIGHT OF DIETHYLENETRIAMINE AND HYDRAZINE IN AN AMOUNT SUCH THAT THE MOLE RATIO OF HYDRAZINE TO DIETHYLENETRAIMINE IS 0.3:1 TO 5:1, SAID AMOUNTS BEING PER 100 PARTS BY WEIGHT OF SAID MONOMERIC MATERIAL.
References Cited (Backward Citations)
US2436926A
Cited
US2429060A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-08-12 | 1956-02-11 | 1956-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-12 | 1960-02-11 | 1960-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-12 | 1964-02-11 | 1964-08-12 | $7700.00 | Window Closed / Lapsed |