Patent US4089823A successfully refreshed from Google Patents.
US4089823A
Expired / Lapsed
US
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Aldehyde polymers from periodic acid treatment of epoxide polymers
Assignee: Czech Academy of Sciences
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Filing: 1976-04-21
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Granted: 1978-05-16
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Expires: 1996-04-21
Abstract
Abstract The invention relates to polymeric materials containing variable amounts of aldehyde groups and comprising the chain units ##STR1## where R 1 , R 2 and R 3 are H, C 1 - C 5 alkyl, aryl, furyl, halogen, nitrile group or hydroxyl and R 4 is C 1 - C 20 alkylene, arylene, --COO(CH 2 ) n --, --O--(CH 2 ) n --, --COO(CH 2 ) n CH(OH)CH 2 OCO(CH 2 ) m -- or --(CH 2 ) n OCOR 5 COO(CH 2 ) m -- (n and m are integers 0 - 20 and R 5 is the single bond, C 1 - C 20 alkylene or hydroxyalkylene or arylene). The material may be in the form of globules with a measurable specific surface area and is suitable for bonding of biologically active compounds containing primary amino groups or other amines to produce polymeric chelating agents. The invention further relates to the method for preparation the above materials which consists in treatment of the polymeric materials comprising units of the general formula ##STR2## where R 1 , R 2 , R 3 and R 4 have the aforesaid meaning and R 6 is H, C 1 - C 20 alkyl or aryl, with the aqueous solution of periodic acid at 0° - 200° C and the pressure 1 Pa to 20 MPa.
Inventors
- 👤 Jaroslav Kalal
- 👤 Frantisek Svec
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:14
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/06; C08F2810/00; C08F2810/20; Y; Y10; Y10S; Y10S528/00; Y10S528/92
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
119 words
Polymeric solid material containing aldehyde groups which comprises units of the general formula I ##STR5## where R 1 , R 2 and R 3 are hydrogen, alkyl containing 1 to 5 carbon atoms, aryl, furyl, halogen, or nitrile group and R 4 is alkylene containing 1 to 20 carbon atoms, arylene, or one of the following bivalent groups: --COO(CH 2 ) n --, --0--(CH 2 ) n --, --COO(CH 2 ) n --CH(OH)--CH 2 OCO(CH 2 ) m --, and --(CH 2 ) n OCOR 5 COO(CH 2 ) m --, where n and m are integers 0 - 20 and R.sub. 5 is the covalent single bond, alkylene or hydroxyalkylene containing 1 to 20 carbon atoms, or arylene.
Claim 2
Dependent Claim
119 words
Polymeric solid material containing aldehyde groups which comprises units of the general formula I ##STR5## where R 1 , R 2 and R 3 are hydrogen, alkyl containing 1 to 5 carbon atoms, aryl, furyl, halogen, or nitrile group and R 4 is alkylene containing 1 to 20 carbon atoms, arylene, or one of the following bivalent groups: --COO(CH 2 ) n --, --0--(CH 2 ) n --, --COO(CH 2 ) n --CH(OH)--CH 2 OCO(CH 2 ) m --, and --(CH 2 ) n OCOR 5 COO(CH 2 ) m --, where n and m are integers 0 - 20 and R.sub. 5 is the covalent single bond, alkylene or hydroxyalkylene containing 1 to 20 carbon atoms, or arylene.
Claim 3
Dependent Claim
22 words
Polymeic material as set forth in claim 1 which is in the form of spherical particles of diameter up to 3 mm.
Claim 4
Dependent Claim
15 words
Polymeric material as set forth in claim 1 which has a measurable specific surface area.
Claim 5
Dependent Claim
171 words
Method for producing polymeric solid material containing aldehyde groups, wherein polymeric material comprising units of the general formula II ##STR6## where R 1 , R 2 and R 3 are hydrogen, alkyl containing 1 to 5 carbon atoms, aryl, furyl, halogen, hydroxyl, or nitrile group and R 4 is alkylene containing 1 to 20 carbon atoms, arylene, --COO(CH 2 ) n --, --O--(CH 2 ) n --, --COO(CH 2 ) n --CH(OH)--CH 2 OCO(CH 2 ) m --, or --(CH 2 ) n OCOR 5 COO(CH 2 ) m , where n and m are integers 0 - 20 and R 5 is the covalent single bond, alkylene or hydroxylakylene containing 1 to 20 carbon atoms or arylene, and R 6 is hydrogen, alkyl containing 1 to 20 carbon atoms or aryl, is treated with an aqueous solution of periodic acid to produce said material comprising units of the general formula I ##STR7## wherein R 1 , R 2 , R 3 and R 4 have the meanings set forth above.
Claim 6
Dependent Claim
171 words
Method for producing polymeric solid material containing aldehyde groups, wherein polymeric material comprising units of the general formula II ##STR6## where R 1 , R 2 and R 3 are hydrogen, alkyl containing 1 to 5 carbon atoms, aryl, furyl, halogen, hydroxyl, or nitrile group and R 4 is alkylene containing 1 to 20 carbon atoms, arylene, --COO(CH 2 ) n --, --O--(CH 2 ) n --, --COO(CH 2 ) n --CH(OH)--CH 2 OCO(CH 2 ) m --, or --(CH 2 ) n OCOR 5 COO(CH 2 ) m , where n and m are integers 0 - 20 and R 5 is the covalent single bond, alkylene or hydroxylakylene containing 1 to 20 carbon atoms or arylene, and R 6 is hydrogen, alkyl containing 1 to 20 carbon atoms or aryl, is treated with an aqueous solution of periodic acid to produce said material comprising units of the general formula I ##STR7## wherein R 1 , R 2 , R 3 and R 4 have the meanings set forth above.
Claim 7
Dependent Claim
26 words
Method for producing the polymeric material as set forth in claim 4, wherein the reaction is carried out at the pressure 1 Pa to 20 MPa.
Claim 8
Dependent Claim
24 words
Method for producing polymeric materials as set forth in claim 4, wherein the reaction is carried out at the temperature 0° to 200° C.
References Cited (Backward Citations)
US3770700A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-05-15 | 1981-11-14 | 1982-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-15 | 1985-11-14 | 1986-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-15 | 1989-11-14 | 1990-05-16 | $7700.00 | Window Closed / Lapsed |