Patent US3004938A successfully refreshed from Google Patents.
US3004938A
Expired / Lapsed
US
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Method of making a synthetic rubber latex employing ethyl hydroxyethylcellulose
Assignee: Uniroyal Inc
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Filing: 1959-05-04
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Granted: 1961-10-17
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Expires: 1979-05-04
Abstract
No abstract record available.
Inventors
- 👤 Victor S Chambers
- 👤 Louis H Howland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:27
CPC Classifications
C; C08; C08C; C08C1/00; C08C1/02; C08C1/065; C08C1/07; C08F; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
THE METHOD OF MAKING A SYNTHETIC RUBBER LATEX WHICH COMPRISES SUBJECTING TO POLYMERIZING CONDITIONS AN AQUEOUS EMULSION OF SYNTHETIC RUBBER FORMING MONOMERS SELECTED FROM THE GROUP CONSISTING OF BUTADIENES-1,3 AND MIXTURES OF BUTADIENES-1,3 WITH UP TO 70% BY WEIGHT OF SUCH MIXTURES OF MONOETHYLENIC COMPOUNDS WHICH CONTAIN A CH2=C< GROUP AND ARE COPOLYMERIZABLE WITH BUTADIENES-1,3 UNTIL A LATEX OF 60% TO 95% CONVERSION IS PRODUCED, AND INCORPORATING IN THE LATEX IN THE PRESENCE OF AT LEAST 5% OF UNREACTED POLYMERIZABLE MONOMERIC MATERIAL BASED ON THE WEIGHT OF THE ORIGINAL SYNTHETIC RUBBER FORMING MONOMERS 0.05 TO 1 PART OF ETHYL HYDROXYETHYL CELLULOSE PER 100 PARTS BY WEIGHT OF ORIGINAL SYNTHETIC RUBBER FORMING MONOMERS AT A TEMPERATURE FROM 0*C. TO 15*C., AND THEN REMOVING UNREACTED MONOMERIC MATERIAL FROM THE LATEX, SAID ETHYL HYDROXYETHYL CELLULOSE HAVING A VISCOSITY IN 2% AQUEOUS SOLUTION AT 20*C. OF 15 TO 600 CENTIPOISES.
Claim 2
Independent Claim
146 words
THE METHOD OF MAKING A SYNTHETIC RUBBER LATEX WHICH COMPRISES SUBJECTING TO POLYMERIZING CONDITIONS AN AQUEOUS EMULSION OF SYNTHETIC RUBBER FORMING MONOMERS SELECTED FROM THE GROUP CONSISTING OF BUTADIENES-1,3 AND MIXTURES OF BUTADIENES-1,3 WITH UP TO 70% BY WEIGHT OF SUCH MIXTURES OF MONOETHYLENIC COMPOUNDS WHICH CONTAIN A CH2=C< GROUP AND ARE COPOLYMERIZABLE WITH BUTADIENES-1,3 UNTIL A LATEX OF 60% TO 95% CONVERSION IS PRODUCED, AND INCORPORATING IN THE LATEX IN THE PRESENCE OF AT LEAST 5% OF UNREACTED POLYMERIZABLE MONOMERIC MATERIAL BASED ON THE WEIGHT OF THE ORIGINAL SYNTHETIC RUBBER FORMING MONOMERS 0.05 TO 1 PART OF ETHYL HYDROXYETHYL CELLULOSE PER 100 PARTS BY WEIGHT OF ORIGINAL SYNTHETIC RUBBER FORMING MONOMERS AT A TEMPERATURE FROM 0*C. TO 15*C., AND THEN REMOVING UNREACTED MONOMERIC MATERIAL FROM THE LATEX, SAID ETHYL HYDROXYETHYL CELLULOSE HAVING A VISCOSITY IN 2% AQUEOUS SOLUTION AT 20*C. OF 15 TO 600 CENTIPOISES.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-10-16 | 1965-04-17 | 1965-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-16 | 1969-04-17 | 1969-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-16 | 1973-04-17 | 1973-10-17 | $7700.00 | Window Closed / Lapsed |