US3974111A
Expired / Lapsed
US
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Polymeric alkoxides based on hydroxyalkyl methacrylates and a method for their preparation
Assignee: Czech Academy of Sciences
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Filing: 1974-12-18
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Granted: 1976-08-10
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Expires: 1994-12-18
Abstract
Abstract Polymeric alkoxides based on hydroxyalkyl methacrylates consist of units ##EQU1## where X is the organic bivalent group with the straight or branched C 2 --C 20 chain and M is Li, Na or K. The polymer has advantageously a heterogeneous structure of a macroporous gel with the inner surface 0.5 - 500 m 2 /g. Polymeric alkoxides are prepared by treatment of a homopolymer or copolymer containing hydroxyl groups with the necessary amount of an alkali metal organic compound dissolved in an aprotic solvent, to convert the hydroxyl groups. Alkyl, aralkyl or aryl C 1 to C 30 derivatives of Li, Na or K are used as the alkali metal organic compounds.
Inventors
- 👤 Lubomir Lochmann
- 👤 Jiri Coupek
- 👤 Jiri Trekoval
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:37
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/42
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
35 words
A copolymer having a polymerized alkylene dimethacrylate having repeating units represented by the formula ##EQU2## wherein X is an alkylene group having from 2 to 20 carbon atoms and M is Li, Na or K.
Claim 2
Dependent Claim
35 words
A copolymer having a polymerized alkylene dimethacrylate having repeating units represented by the formula ##EQU2## wherein X is an alkylene group having from 2 to 20 carbon atoms and M is Li, Na or K.
Claim 3
Dependent Claim
29 words
The copolymer of claim 1, wherein said copolymer possesses a heterogeneous structure of a macroporous gel having an inner surface area of from 0.5 to 500 m 2 /g.
Claim 4
Dependent Claim
79 words
The method of preparing the copolymer of claim 1, comprising the step of treating a copolymer containing repeating units represented by the formula ##STR3## with a solution of an alkali metal organic compound in a aprotic solvent in the amount necessary for conversion of the hydroxyl groups, said treatment being at a temperature in the range from -70° to 50°C, and wherein said alkali metal organic compound is an alkyl, aralkyl or aryl derivative of Li, Na or K.
Claim 5
Dependent Claim
10 words
The copolymer of claim 1 containing hydroxyalkyl methacrylate repeating units.
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) | 1979-08-10 | 1980-02-09 | 1980-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-10 | 1984-02-09 | 1984-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-10 | 1988-02-09 | 1988-08-10 | $7700.00 | Window Closed / Lapsed |