US2543844A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plasticizing synthetic rubber with a reaction product of an alkyl mercaptan and a rubbery diolefin polymer
Assignee: Phillips Petroleum Co
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Filing: 1945-08-27
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Granted: 1951-03-06
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Expires: 1965-08-27
Abstract
No abstract record available.
Inventors
- 👤 Charles F Fryling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:22
CPC Classifications
C; C08; C08C; C08C19/00; C08C19/20; Y; Y10; Y10S; Y10S528/00; Y10S528/931; Y10S528/934; Y10S528/936
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
A PROCESS FOR THE PRODUCTION OF A LIQUID PLASTICIZER FOR SYNTHETIC RUBBER , WHICH COMPRISES REACTING NORMAL DODECYL MERCAPTAN WITH A LATEX RESULTING FROM EMULSION COPOLYMERIZATION OF1,3BUTADIENE AND STYRENE, SAID REACTION BEING CARRIED OUT AT A REACTION TEMPERATURE BETWEEN 30 AND 150* F. FOR A REACTION TIME OF 1 TO 24 HOURS IN THE PRESENCE OF AN OXIDIZING AGENT AND WITH AN AMOUNT OF SAID MERCAPTAN SUCH THAT THE DOUBLE BONDS OF THE RUBBER IN SAID LATEX ARE SATURATED TO AN EXTEND BETWEEN 15 TO 60 PER CENT, AND THE RESULTING PRODUCT HAS A SYRUPY CONSISTENCY, COAGULATING THE RESULTING LATEX REACTION MIXTURE, AND RECOVERING THEREFROM A SYRUPY PRODUCT SO PRODUCED.
Claim 2
Dependent Claim
110 words
A PROCESS FOR THE PRODUCTION OF A LIQUID PLASTICIZER FOR SYNTHETIC RUBBER , WHICH COMPRISES REACTING NORMAL DODECYL MERCAPTAN WITH A LATEX RESULTING FROM EMULSION COPOLYMERIZATION OF1,3BUTADIENE AND STYRENE, SAID REACTION BEING CARRIED OUT AT A REACTION TEMPERATURE BETWEEN 30 AND 150* F. FOR A REACTION TIME OF 1 TO 24 HOURS IN THE PRESENCE OF AN OXIDIZING AGENT AND WITH AN AMOUNT OF SAID MERCAPTAN SUCH THAT THE DOUBLE BONDS OF THE RUBBER IN SAID LATEX ARE SATURATED TO AN EXTEND BETWEEN 15 TO 60 PER CENT, AND THE RESULTING PRODUCT HAS A SYRUPY CONSISTENCY, COAGULATING THE RESULTING LATEX REACTION MIXTURE, AND RECOVERING THEREFROM A SYRUPY PRODUCT SO PRODUCED.
References Cited (Backward Citations)
GB390532A
Cited
US2234204A
Cited
US2316949A
Cited
US2411954A
Cited
US2463224A
Cited
US2425840A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-05 | 1954-09-04 | 1955-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-05 | 1958-09-04 | 1959-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-05 | 1962-09-04 | 1963-03-06 | $7700.00 | Window Closed / Lapsed |