Patent US3806936A successfully refreshed from Google Patents.
US3886129A
Expired / Lapsed
US
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Copolymers of vinyl chloride and 2-hydroxypropyl acrylate
Assignee: Wacker Chemie AG
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Filing: 1974-02-08
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Granted: 1975-05-27
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Expires: 1994-02-08
Abstract
Abstract Copolymers of vinyl chloride and 2-hydroxypropyl acrylate consisting of a copolymer with from 60 to 95% by weight of vinyl chloride monomer units and from 5 to 40% by weight of 2hydroxypropyl acrylate monomer units, having a K-value of from 20 to 60 measured in cyclohexanone, as well as the method of producing the same by continuous addition of the monomer mix to an aqueous emulsion.
Inventors
- 👤 Dieter Kurz
- 👤 Herbert Kandler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:26
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/14; B05D7/16; C; C08; C08F; C08F214/00; C08F214/02; C08F214/04; C08F214/06; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/62; C08G18/6275; C09; C09D; C09D127/00; C09D127/02; C09D127/04; C09D127/06
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
99 words
COPOLYMERS OF VINYL CHLORIDE AND 2-HYDROXYPROPYL ACRYLATE CONSISTING OF A COPOLYMER WITH FROM 60 TO 95% BY WEIGHT OF VINYL CHLORIDE MONOMER UNITS AND FROM 5 TO 40% BY WEIGHT OF 2-HYDROXYPROPYL ACRYLATE MONOMER UNITS, HAVING A-VALUE OF FROM 20 TO 60 MEASURED IN CYCLOHEXANONE PRODUCED BY THE PROCESS COMPRISING THE STEPS OF PREPARING AN AQUEOUS PHASE CONTAINING AT LEAST ONE WATER-SOLUBLE FREE RADICAL POLYMERIZATION CATALYST AND AT LEAST ONE OIL-IN-WATER EMULSIFIER, CONTINUOUSLY ADDING THERETO A MIXTURE OF VINYL CHLORIDE AND 2HYDROXYPROPYL ACRYLATE IN AMOUNTS SUFFICIENT TO GIVE A COPOLYMERIZATE HAVING FROM 60 TO 95% BY WEIGHT OF VINYL
Claim 2
Dependent Claim
99 words
COPOLYMERS OF VINYL CHLORIDE AND 2-HYDROXYPROPYL ACRYLATE CONSISTING OF A COPOLYMER WITH FROM 60 TO 95% BY WEIGHT OF VINYL CHLORIDE MONOMER UNITS AND FROM 5 TO 40% BY WEIGHT OF 2-HYDROXYPROPYL ACRYLATE MONOMER UNITS, HAVING A-VALUE OF FROM 20 TO 60 MEASURED IN CYCLOHEXANONE PRODUCED BY THE PROCESS COMPRISING THE STEPS OF PREPARING AN AQUEOUS PHASE CONTAINING AT LEAST ONE WATER-SOLUBLE FREE RADICAL POLYMERIZATION CATALYST AND AT LEAST ONE OIL-IN-WATER EMULSIFIER, CONTINUOUSLY ADDING THERETO A MIXTURE OF VINYL CHLORIDE AND 2HYDROXYPROPYL ACRYLATE IN AMOUNTS SUFFICIENT TO GIVE A COPOLYMERIZATE HAVING FROM 60 TO 95% BY WEIGHT OF VINYL
Claim 3
Dependent Claim
39 words
The copolymer of claim 1 having a content of 75 to 90% by weight of vinyl chloride monomer units and 10 to 25% by weight of 2-hydroxypropyl acrylate monomer units and having a K-value of from 30 to 50.
Claim 4
Dependent Claim
106 words
A process for the production of a copolymer of vinyl chloride and 2-hydRoxypropyl acrylate comprising the steps of preparing an aqueous phase containing at least one water-soluble free radical polymerization catalyst and at least one oil-in-water emulsifier, continuously adding thereto a mixture of vinyl chloride and 2-hydroxypropyl acrylate in amounts sufficient to give a copolymerizate having from 60 to 95% by weight of vinyl chloride monomer units and from 5 to 40% by weight of 2-hydroxypropyl acrylate monomer units while stirring at a temperature of between 30*C and 80*C at a rate sufficient to maintain the autogeneous pressure of the vinyl chloride, and recovering said copolymer.
Claim 5
Dependent Claim
106 words
A process for the production of a copolymer of vinyl chloride and 2-hydRoxypropyl acrylate comprising the steps of preparing an aqueous phase containing at least one water-soluble free radical polymerization catalyst and at least one oil-in-water emulsifier, continuously adding thereto a mixture of vinyl chloride and 2-hydroxypropyl acrylate in amounts sufficient to give a copolymerizate having from 60 to 95% by weight of vinyl chloride monomer units and from 5 to 40% by weight of 2-hydroxypropyl acrylate monomer units while stirring at a temperature of between 30*C and 80*C at a rate sufficient to maintain the autogeneous pressure of the vinyl chloride, and recovering said copolymer.
References Cited (Backward Citations)
US3803111A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-26 | 1978-11-25 | 1979-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-26 | 1982-11-25 | 1983-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-26 | 1986-11-25 | 1987-05-27 | $7700.00 | Window Closed / Lapsed |