Patent US4965526A successfully refreshed from Google Patents.
Patent US3878181A successfully refreshed from Google Patents.
US3878181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Emulsion polymerisation of chloroprene with diethylhydroxy-amines as inactivator
Assignee: Bayer AG
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Filing: 1974-01-07
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Granted: 1975-04-15
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Expires: 1994-01-07
Abstract
Abstract A process for terminating the polymerisation of chloroprene and/or 2,3-dichlorobutadiene in which diethylhydroxylamine is added to the polymerisation mixture in an amount sufficient to stop polymerisation.
Inventors
- 👤 Rudolf Mayer-Mader
- 👤 Gerhard Hohmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:33
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04; C08F36/14; C08F36/16
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
103 words
A PROCESS FOR TERMINATING THE AQUEOUS EMULSION POLYMERISATION OF 2,3-DICHLOROBUTADIENE WHICH COMPRISES ADDING TO THE POLYMERISATION MIXTURE WHEN THE MONOMER CONVERSION REACHES 40-80 PERCENT BY WEIGHT, 0.05 TO 5 PARTS BY WEIGHT OF DIETHYLHYDROXYLAMINE PER 100 PARTS BY WEIGHT OF 2,3-DICHLOROBUTADIENE AND 0.05 TO 5 PARTS BY WEIGHT OF A WATER-SOLUBLE AMINE, PER 100 PARTS BY WEIGHT OF 2.3DICHLOROBUTADIENE, SAID WATER SOLUBLE AMINE BEING OF THE FORMULA NR3 WHEREIN TWO OF THE R GROUPS ARE HYDROXYALKYL HAVING 1 TO 10 CARBON ATOMS AND THE THIRD R GROUP IS SELECTED FROM THE GROUP CONSISTING OF HYDROCYL AND ALKYL HAVING 1 TO 10 CARBON ATOMS.
Claim 2
Dependent Claim
103 words
A PROCESS FOR TERMINATING THE AQUEOUS EMULSION POLYMERISATION OF 2,3-DICHLOROBUTADIENE WHICH COMPRISES ADDING TO THE POLYMERISATION MIXTURE WHEN THE MONOMER CONVERSION REACHES 40-80 PERCENT BY WEIGHT, 0.05 TO 5 PARTS BY WEIGHT OF DIETHYLHYDROXYLAMINE PER 100 PARTS BY WEIGHT OF 2,3-DICHLOROBUTADIENE AND 0.05 TO 5 PARTS BY WEIGHT OF A WATER-SOLUBLE AMINE, PER 100 PARTS BY WEIGHT OF 2.3DICHLOROBUTADIENE, SAID WATER SOLUBLE AMINE BEING OF THE FORMULA NR3 WHEREIN TWO OF THE R GROUPS ARE HYDROXYALKYL HAVING 1 TO 10 CARBON ATOMS AND THE THIRD R GROUP IS SELECTED FROM THE GROUP CONSISTING OF HYDROCYL AND ALKYL HAVING 1 TO 10 CARBON ATOMS.
Claim 3
Dependent Claim
9 words
The process of claim 1 wherein NR3 is triethanolamine.
References Cited (Backward Citations)
US2576009A
Cited
US3222334A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |