US3926912A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerizing chloroprene in the presence of xanthogen disulphides with functional groups
Assignee: Bayer AG
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Filing: 1974-02-06
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Granted: 1975-12-16
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Expires: 1994-02-06
Abstract
Abstract WHEREIN X H, alkyl, aryl, aralkyl or halogen N 1 TO 20, A PROCESS FOR PREPARING THEM, A PROCESS FOR POLYMERISING DIENES AND MONOETHYLENICALLY UNSATURATED COPOLYMERIZABLE MONOMERS IN THE PRESENCE OF THESE PARTICULAR XANTHOGEN DISULPHIDES AND TO VULCANISABLE RUBBER MIXTURES CONSISTING OF AN UNCROSS-LINKED BENZENE SOLUBLE CHLOROPRENE HOMOPOLYMER OR COPOLYMER WHICH IS PREPARED IN THE PRESENCE OF SAID XANTHOGEN DISULPHIDES. or in which R is the same or different and denotes the following groups: This invention relates to xanthogen disulphides of the formula
Inventors
- 👤 Rudolf Mayer-Mader
- 👤 Wilhelm Gobel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:57
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04; C08F36/14; C08F36/16; C07; C07D; C07D317/00; C07D317/08; C07D317/10; C07D317/14; C07D317/18; C07D317/24; C07D319/00; C07D319/04; C07D319/06; C08F36/18; C08L; C08L11/00; C08K; C08K5/00; C08K5/36; C08K5/38; C08L2205/00; C08L2205/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
76 words
A PROCESS FOR PRODUCING A CHLOROPRENE POLYMER WHICH COMPRISES POLYMERIZING 60 TO 100 PARTS BY WEIGHT OF CHLOROPRENE AND 40 TO 0 PARTS BY WEIGHT OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF A DIENE IN WHICH THE HYDROGEN ATOMS MAY BE PARTIALLY OR COMPLETELY SUBSTITUTED BY HALOGEN ATOMS, AN MONOETHYLENICALLY UNSATURATED COPOLYMERIZABLE MONOMER OR A MIXTURE THEREOF IN THE PRESENCE OF 0.05 TO 30 PARTS BY WEIGHT OF AN XANTHOGEN DISULPHIDE OF THE FORMULA
Claim 2
Dependent Claim
76 words
A PROCESS FOR PRODUCING A CHLOROPRENE POLYMER WHICH COMPRISES POLYMERIZING 60 TO 100 PARTS BY WEIGHT OF CHLOROPRENE AND 40 TO 0 PARTS BY WEIGHT OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF A DIENE IN WHICH THE HYDROGEN ATOMS MAY BE PARTIALLY OR COMPLETELY SUBSTITUTED BY HALOGEN ATOMS, AN MONOETHYLENICALLY UNSATURATED COPOLYMERIZABLE MONOMER OR A MIXTURE THEREOF IN THE PRESENCE OF 0.05 TO 30 PARTS BY WEIGHT OF AN XANTHOGEN DISULPHIDE OF THE FORMULA
Claim 3
Dependent Claim
12 words
The process of claim 1 wherein R1 and R2 are the same.
Claim 4
Dependent Claim
19 words
The process of claim 1 wherein the X groups are hydrogen or alkyl having 1 to 6 carbon atoms.
Claim 5
Dependent Claim
18 words
The process of claim 1 wherein 0.15 to 1.0 part by weight of said xanthogen disulphide is employed.
Claim 6
Dependent Claim
27 words
The process of claim 1 wherein the polymerization is liter out in the presence of 0.1 to 0.6% by weight of sulphur, based on the monomer weight.
Claim 7
Dependent Claim
26 words
The process of claim 1 wherein 100 parts by weight of chloroprene and 0 parts by weight of said member selected from said group is employed.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-15 | 1979-06-16 | 1979-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-15 | 1983-06-16 | 1983-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-15 | 1987-06-16 | 1987-12-16 | $7700.00 | Window Closed / Lapsed |