US2595892A
Expired / Lapsed
US
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Alkali metal alkyltoluene sulfonates as emulsifying agents in low temperature emulsion polymerization processes
Assignee: Phillips Petroleum Co
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Filing: 1948-12-09
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Granted: 1952-05-06
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Expires: 1968-12-09
Abstract
No abstract record available.
Inventors
- 👤 Walter A Schulze
- 👤 Willie W Crouch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:37
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04; Y; Y10; Y10S; Y10S526/00; Y10S526/911
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
IN THE PRODUCTION OF A SYNTHETIC RUBBER BY COPOLYMERIZING IN AN AQUEOUS EMULSION IN THE PRESENCE OF AN EMULSIFYING AGENT A MONOMERIC MATERIAL COMPRISING 65 TO 90 PER CENT BY WEIGHT 1,3-BUTADIENE AND THE REMAINDER STYRENE, THE AQUEOUS MEDIUM OF SAID EMULSION COMPRISING AN ORGANIC ALCOHOL AS ANTIFREEZE AGENT, THE IMPROVEMENT WHICH COMPRISES EFFECTING SAID POLYMERIZATION AT A TEMPERATURE BETWEEN -30 AND 0* C. IN THE PRSENCE OF A SODIUM MONOALKYL TOLUENE SULFONATE HAVING NIE TO TWENTY-THREE CARBON ATOMS IN SAID MONOALKYL GROUP AND FREE FROM COPRODUCT MATERIALS COMPRISING ALKALI METAL SULFATES AND UNSULFONATED OILS, AS SAID EMULSIFYING AGENT, IN AN AMOUNT BETWEEN TWO AND EIGHT PARTS BY WEIGHT PER 100 PARTS OF SAID MONOMERIC MATERIAL WITH A RATIO OF AQUEOUS MEDIUM TO MONOMERIC MATERIAL BETWEEN 1.5:1 AND 2.75:1 BY WEIGHT.
Claim 2
Dependent Claim
131 words
IN THE PRODUCTION OF A SYNTHETIC RUBBER BY COPOLYMERIZING IN AN AQUEOUS EMULSION IN THE PRESENCE OF AN EMULSIFYING AGENT A MONOMERIC MATERIAL COMPRISING 65 TO 90 PER CENT BY WEIGHT 1,3-BUTADIENE AND THE REMAINDER STYRENE, THE AQUEOUS MEDIUM OF SAID EMULSION COMPRISING AN ORGANIC ALCOHOL AS ANTIFREEZE AGENT, THE IMPROVEMENT WHICH COMPRISES EFFECTING SAID POLYMERIZATION AT A TEMPERATURE BETWEEN -30 AND 0* C. IN THE PRSENCE OF A SODIUM MONOALKYL TOLUENE SULFONATE HAVING NIE TO TWENTY-THREE CARBON ATOMS IN SAID MONOALKYL GROUP AND FREE FROM COPRODUCT MATERIALS COMPRISING ALKALI METAL SULFATES AND UNSULFONATED OILS, AS SAID EMULSIFYING AGENT, IN AN AMOUNT BETWEEN TWO AND EIGHT PARTS BY WEIGHT PER 100 PARTS OF SAID MONOMERIC MATERIAL WITH A RATIO OF AQUEOUS MEDIUM TO MONOMERIC MATERIAL BETWEEN 1.5:1 AND 2.75:1 BY WEIGHT.
References Cited (Backward Citations)
US2375140A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-06 | 1955-11-05 | 1956-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-06 | 1959-11-05 | 1960-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-06 | 1963-11-05 | 1964-05-06 | $7700.00 | Window Closed / Lapsed |