US4163091A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the polymerization of chloroprene
Assignee: Bayer AG
•
Filing: 1977-06-14
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Granted: 1979-07-31
•
Expires: 1997-06-14
Abstract
Abstract The polymerization of chloroprene in the presence of an inorganic peroxy compound, anthraquinone-2-sulphonic acid-alkali salt and formamidine sulphinic acid.
Inventors
- 👤 Hans-Jurgen Pettelkau
- 👤 Gerhard Hohmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:47
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04; C08F36/14; C08F36/16; C08F36/18
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
42 words
An activator/initiator composition for the polymerization of chloroprene containing 95 to 50% by weight of formamidine sulphinic acid, 4.5 to 25% by weight of an inorganic peroxy compound and 0.5 to 25% by weight of an alkali metal salt of anthraquinone-2-sulphonic acid.
Claim 2
Dependent Claim
42 words
An activator/initiator composition for the polymerization of chloroprene containing 95 to 50% by weight of formamidine sulphinic acid, 4.5 to 25% by weight of an inorganic peroxy compound and 0.5 to 25% by weight of an alkali metal salt of anthraquinone-2-sulphonic acid.
Claim 3
Dependent Claim
24 words
The activator/initiator composition of claim 1 wherein the quantitative ratio of the peroxy compound to the alkali metal salt is from 2:1 to 10:1.
Claim 4
Dependent Claim
42 words
A monomer containing composition comprising chloroprene and up to 50% by weight, based on total monomer, of a monomer which is copolymerizable with chloroprene and from 0.02 to 0.6% by weight, based on total monomer, of the activator/initiator composition of claim 1.
Claim 5
Dependent Claim
46 words
A method of polymerizing a monomer composition containing chloroprene and up to 50% by weight, based on total monomer, of a monomer copolymerizable with chloroprene, said method comprising carrying out the polymerization in the presence of an effective amount of the activator/initiator composition of claim 1.
Claim 6
Dependent Claim
42 words
The method of claim 4 wherein the alkali metal salt of anthraquinone-2-sulphonic acid and the peroxy compound are added to the monomer composition before the beginning of polymerization and polymerization is initiated and controlled by the addition of said formamidine sulphinic acid.
References Cited (Backward Citations)
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US3013000A
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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) | 1982-07-30 | 1983-01-29 | 1983-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-07-30 | 1987-01-29 | 1987-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-07-30 | 1991-01-29 | 1991-07-31 | $7700.00 | Window Closed / Lapsed |