US3190865A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chloroprene polymerization process
Assignee: EIDP Inc
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Filing: 1961-11-02
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Granted: 1965-06-22
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Expires: 1981-11-02
Abstract
No abstract record available.
Inventors
- 👤 Kenneth L Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:27
CPC Classifications
C; C08; C08F; C08F236/00; C08F236/02; C08F236/04; C08F236/14; C08F236/16; C08F36/00; C08F36/02; C08F36/04; C08F36/14; C08F36/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
166 words
IN THE POLYMERIZATION OF CHLOROPRENE IN AN AQUEOUS EMULSION IN THE PRESENCE OF FROM 0.01 TO 0.04 PART MOLE PER 100 PARTS OF CHLOROPRENE OF A DIALKYL XANTHOGEN DISULFIDE WHEREIN THE ALKYL GROUPS CONTAING FROM 1 TO 8 CARBON ATOMS, AT A TEMPERATURE OF FROM ABOUT 15 TO 25*C. AND AT A PH OF FROM ABOUT 5 TO 11, THE IMPROVEMENT COMPRISING CARRYING OUT POLYMERIZATION IN THE PRESENCE OF A CATALYST SYSTEM COMPRISING PER 100 PARTS BY WEIGHT OF CHLOROPRENE (A) 0.00065 TO 0.0013 PART MOLE OF AN ORGANIC HYDROPEROXIDE, (B) 0.1 TO 0.3 PART BY WEIGHT OF AN INORGANIC WATERSOLUBLE PERSULFATE, AND (C) AT LEAST 0.05 PART BY WEIGHT OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF AN ORGANIC WATER-SOLUBLE HYDROSULFITE, AN INORGANIC WATER-SOLUBLE PYROSULFITE AND MIXTURES THEREOF; WITH THE PROVISO THAT COMPONENTS (A) AND (B) OF SAID CATALYST SYSTEM BE ADDED SEPARATELY TO THE POLYMERIZATION SYSTEM BEFORE POLYMERIZATION IS INITIATED WITH POLYMERIZATION THEN BEING INITIATED AND MAINTAINED BY THE ADDITION OF COMPONENT (C).
Claim 2
Dependent Claim
166 words
IN THE POLYMERIZATION OF CHLOROPRENE IN AN AQUEOUS EMULSION IN THE PRESENCE OF FROM 0.01 TO 0.04 PART MOLE PER 100 PARTS OF CHLOROPRENE OF A DIALKYL XANTHOGEN DISULFIDE WHEREIN THE ALKYL GROUPS CONTAING FROM 1 TO 8 CARBON ATOMS, AT A TEMPERATURE OF FROM ABOUT 15 TO 25*C. AND AT A PH OF FROM ABOUT 5 TO 11, THE IMPROVEMENT COMPRISING CARRYING OUT POLYMERIZATION IN THE PRESENCE OF A CATALYST SYSTEM COMPRISING PER 100 PARTS BY WEIGHT OF CHLOROPRENE (A) 0.00065 TO 0.0013 PART MOLE OF AN ORGANIC HYDROPEROXIDE, (B) 0.1 TO 0.3 PART BY WEIGHT OF AN INORGANIC WATERSOLUBLE PERSULFATE, AND (C) AT LEAST 0.05 PART BY WEIGHT OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF AN ORGANIC WATER-SOLUBLE HYDROSULFITE, AN INORGANIC WATER-SOLUBLE PYROSULFITE AND MIXTURES THEREOF; WITH THE PROVISO THAT COMPONENTS (A) AND (B) OF SAID CATALYST SYSTEM BE ADDED SEPARATELY TO THE POLYMERIZATION SYSTEM BEFORE POLYMERIZATION IS INITIATED WITH POLYMERIZATION THEN BEING INITIATED AND MAINTAINED BY THE ADDITION OF COMPONENT (C).
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) | 1968-06-21 | 1968-12-21 | 1969-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-21 | 1972-12-21 | 1973-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-21 | 1976-12-21 | 1977-06-22 | $7700.00 | Window Closed / Lapsed |