US2609366A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Use of methanol in emulsion polymerization
Assignee: Phillips Petroleum Co
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Filing: 1948-10-04
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Granted: 1952-09-02
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Expires: 1968-10-04
Abstract
No abstract record available.
Inventors
- 👤 Charles F Fryling
- 👤 James E Troyan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:29
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
AN IMPROVED PROCESS FOR THE PRODUCTION OF SYNTHETIC RUBBER, WHICH COMPRISES POLYMERIZING A MONOMERIC MATERIAL COMPRISING 1,3-BUTADIENE AT A POLYMERIZATION TEMPERATURE BETWEEN 0 AND -40* C. WHILE DISPERSED IN AN AQUEOUS MEDIUM CONTAINING METHANOL IN AN AMOUNT BETWEEN 10 AND 50 PER CENT BY WEIGHT OF SAID AQUEOUS MEDIUM AND SUCH THAT SAID MEDIUM HAS A FREEZING POINT LOWER THAN SAID POLYMERIZATION TEMPERATURE, WITH THE RELATIVE AMOUNT OF SAID AQUEOUS MEDIUM SUCH THAT SAID EMULSION IS OF THE OIL-INWATER TYPE AND THE RESULTING SYNTHETIC RUBBER LATEX REMAINS FLUID AT SAID POLYMERIZATION TEMPERATURE, AND SEPARATELY ADDING TO SAID DISPERSION PHENYL (DIMETHYL) HYDROPEROXYMETHANE AND AN ACTIVATOR SOLUTION PREPARED BY DISSOLVING IN WATER FERROUS SULFATE AND A PYROPHOSPHATE OF AN ALKALI METAL.
Claim 2
Dependent Claim
119 words
AN IMPROVED PROCESS FOR THE PRODUCTION OF SYNTHETIC RUBBER, WHICH COMPRISES POLYMERIZING A MONOMERIC MATERIAL COMPRISING 1,3-BUTADIENE AT A POLYMERIZATION TEMPERATURE BETWEEN 0 AND -40* C. WHILE DISPERSED IN AN AQUEOUS MEDIUM CONTAINING METHANOL IN AN AMOUNT BETWEEN 10 AND 50 PER CENT BY WEIGHT OF SAID AQUEOUS MEDIUM AND SUCH THAT SAID MEDIUM HAS A FREEZING POINT LOWER THAN SAID POLYMERIZATION TEMPERATURE, WITH THE RELATIVE AMOUNT OF SAID AQUEOUS MEDIUM SUCH THAT SAID EMULSION IS OF THE OIL-INWATER TYPE AND THE RESULTING SYNTHETIC RUBBER LATEX REMAINS FLUID AT SAID POLYMERIZATION TEMPERATURE, AND SEPARATELY ADDING TO SAID DISPERSION PHENYL (DIMETHYL) HYDROPEROXYMETHANE AND AN ACTIVATOR SOLUTION PREPARED BY DISSOLVING IN WATER FERROUS SULFATE AND A PYROPHOSPHATE OF AN ALKALI METAL.
References Cited (Backward Citations)
US2546220A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-09-02 | 1956-03-03 | 1956-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-02 | 1960-03-03 | 1960-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-02 | 1964-03-03 | 1964-09-02 | $7700.00 | Window Closed / Lapsed |