US3779960A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing synthetic rubber latex having high polymer concentration and low viscosity
Assignee: Eneos Corp
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Filing: 1971-12-28
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Granted: 1973-12-18
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Expires: 1991-12-28
Abstract
Abstract A PROCESS IS DISCLOSED FOR PRODUCING A SYNTHETIC RUBBER LATEX HAVING RELATIVELY HIGH POLYMER CONCENTRATION AND LOW VISCOSITY BY POLYMERIZING ALIPHATIC CONJUGATED DIOLEFINS OR MIXTURES OF THESE DIOLEFINS AND VINYL COMPOUNDS IN AN EMULSION POLYMERIZATION SYSTEM. THE PROCESS IS CHARACTERIZED BY THE USE OF CERTAIN NON-IONIC WATER-SOLUBLE POLYMERIC COLLOIDS IN PRESCRIBED AMOUNTS, WHICH COLLOIDS EXHIBIT PERCULIAR EFFECT UPON THE QUALITY OF RESULTING LATEX. THE POLYMERIZATION IS FURTHER CONDUCTED IN THE PRESENCE OF CERTAIN WATER-SOLUBLE METAL SALTS WHICH CONTRIBUTE FOR LIMITED AMOUNTS TO THE PRODUCTION OF HIGH QUALITY LATEXES CONTEMPLATED BY THIS INVENTION.
Inventors
- 👤 Y Araki
- 👤 H Hayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:10
CPC Classifications
C; C08; C08F; C08F291/00; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-17 | 1977-06-18 | 1977-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-17 | 1981-06-18 | 1981-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-17 | 1985-06-18 | 1985-12-18 | $7700.00 | Window Closed / Lapsed |