US2615009A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for emulsion polymerization at low temperatures
Assignee: Phillips Petroleum Co
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Filing: 1949-04-18
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Granted: 1952-10-21
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Expires: 1969-04-18
Abstract
No abstract record available.
Inventors
- 👤 Jr Willard M St John
- 👤 Carl A Uraneck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:03
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
IN A PROCESS FOR THE PRODUCTION OF SYNTHETIC RUBBER BY POLYMERIZATION IN AN AQUEOUS EMULSION OF A MONOMERIC MATERIAL COMPRISING AT LEAST 65 PER CENT BY WEIGHT 1,3-BUTADIENE AND ALSO STYRENE AT A POLYMERIZATION TEMPERATURE BELOW 0* C., THE IMPROVEMENT WHICH COMPRISES UTILIZING AS THE AQUEOUS MEDIUM OF SAID EMULSION AN AQUEOUS SOLUTION CONTAINING SODIUM CHLORIDE IN AN AMOUNT BETWEEN 10 AND 30 PER CENT BY WEIGHT OF WATER IN SAID SOLUTION 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-IN-WATER TYPE, AND ALSO UTILIZING POTASSIUM CAPRYLATE AS THE EMULSIFYING AGENT AND TERTIARY BUTYL MERCAPTAN AS THE POLYMER MODIFYING AGENT.
Claim 2
Dependent Claim
121 words
IN A PROCESS FOR THE PRODUCTION OF SYNTHETIC RUBBER BY POLYMERIZATION IN AN AQUEOUS EMULSION OF A MONOMERIC MATERIAL COMPRISING AT LEAST 65 PER CENT BY WEIGHT 1,3-BUTADIENE AND ALSO STYRENE AT A POLYMERIZATION TEMPERATURE BELOW 0* C., THE IMPROVEMENT WHICH COMPRISES UTILIZING AS THE AQUEOUS MEDIUM OF SAID EMULSION AN AQUEOUS SOLUTION CONTAINING SODIUM CHLORIDE IN AN AMOUNT BETWEEN 10 AND 30 PER CENT BY WEIGHT OF WATER IN SAID SOLUTION 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-IN-WATER TYPE, AND ALSO UTILIZING POTASSIUM CAPRYLATE AS THE EMULSIFYING AGENT AND TERTIARY BUTYL MERCAPTAN AS THE POLYMER MODIFYING AGENT.
References Cited (Backward Citations)
US2469017A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-10-21 | 1956-04-21 | 1956-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-21 | 1960-04-21 | 1960-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-21 | 1964-04-21 | 1964-10-21 | $7700.00 | Window Closed / Lapsed |