US4314032A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crosslinked polyvinyl alcohol gel
Assignee: Kureha Corp
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Filing: 1979-10-17
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Granted: 1982-02-02
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Expires: 1999-10-17
Abstract
Abstract A crosslinked polyvinyl alcohol gel having vinyl alcohol units and crosslinking units having the formula ##STR1## wherein R 1 , R 2 and R 3 are respectively the same or different and selected from the group consisting of --CH 2 --CH═CH 2 , --CH 2 --CH.tbd.CH and ##STR2## as a packing for a gel chromatography.
Inventors
- 👤 Naohiro Murayama
- 👤 Teruo Sakagami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:20
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/12; Y; Y10; Y10S; Y10S524/00; Y10S524/916
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
83 words
A crosslinked non-ionic polyvinyl alcohol gel useful as a packing for gel chromatography which is obtained by a process, comprising: copolymerizing 100 parts by weight of a vinylacylate and 0.1 to 50 parts by weight of a crosslinking agent having the formula (I) or (II): ##STR8## wherein R 1 , R 2 and R 3 are the same or different and each is selected from the group consisting of --CH 2 --CH═CH 2 , --CH 2 --C.tbd.CH and ##STR9## and hydrolyzing the product.
Claim 2
Dependent Claim
83 words
A crosslinked non-ionic polyvinyl alcohol gel useful as a packing for gel chromatography which is obtained by a process, comprising: copolymerizing 100 parts by weight of a vinylacylate and 0.1 to 50 parts by weight of a crosslinking agent having the formula (I) or (II): ##STR8## wherein R 1 , R 2 and R 3 are the same or different and each is selected from the group consisting of --CH 2 --CH═CH 2 , --CH 2 --C.tbd.CH and ##STR9## and hydrolyzing the product.
Claim 3
Dependent Claim
27 words
The crosslinked polyvinyl alcohol gel according to claim 1, wherein said vinyl acylate is a compound of the formula ##STR10## wherein R is a lower alkyl group.
Claim 4
Dependent Claim
32 words
The crosslinked polyvinylalcohol gel according to claim 1, wherein said ratio ranges from 0.5 to 30 parts by wt of said crosslinking agent per 100 parts by wt of said vinyl acylate.
Claim 5
Dependent Claim
24 words
The crosslinked polyvinyl alcohol gel according to claim 1 wherein the gel has a bead form having a particle diameter of 10μ to 500μ.
Claim 6
Dependent Claim
17 words
The crosslinked polyvinyl alcohol gel according to claim 1 wherein the vinyl acylate component is vinyl acetate.
Claim 7
Dependent Claim
39 words
The crosslinked polyvinyl alcohol gel according to claim 1 wherein the pore size of the crosslinked polyvinyl alcohol gel is in the range of 100 to 5,000 A and is controlled by incorporating a diluent in the polymerization system.
Claim 8
Dependent Claim
16 words
The crosslinked polyvinyl alcohol gel according to claim 1 wherein the gel is post-crosslinked by epichlorohydrin.
Claim 9
Dependent Claim
27 words
The crosslinked polyvinyl alcohol gel according to claim 1 wherein the gel has vinyl alcohol units crosslinked by the crosslinking units in a three dimensional net structure.
Claim 10
Dependent Claim
82 words
A crosslinked, non-ionic polyvinyl alcohol gel useful as a packing for gel chromatography obtained by a process, consisting essentially of: copolymerizing 100 parts by weight of a vinylacylate and 0.1 to 50 parts by weight of a crosslinking agent having the formula (I) or ##STR11## wherein R 1 , R 2 and R 3 are the same or different and each is selected from the group consisting of --CH 2 --CH═CH 2 , --CH 2 --C.tbd.CH and ##STR12## and hydrolyzing the product.
Claim 11
Dependent Claim
82 words
A crosslinked, non-ionic polyvinyl alcohol gel useful as a packing for gel chromatography obtained by a process, consisting essentially of: copolymerizing 100 parts by weight of a vinylacylate and 0.1 to 50 parts by weight of a crosslinking agent having the formula (I) or ##STR11## wherein R 1 , R 2 and R 3 are the same or different and each is selected from the group consisting of --CH 2 --CH═CH 2 , --CH 2 --C.tbd.CH and ##STR12## and hydrolyzing the product.
References Cited (Backward Citations)
US2843562A
Cited
GB1135302A
Cited
CH495763A
Cited
GB1230560A
Cited
GB1479114A
Cited
FR2333005B1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-02-01 | 1985-08-03 | 1986-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-02-01 | 1989-08-03 | 1990-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-02-01 | 1993-08-03 | 1994-02-02 | $7700.00 | Window Closed / Lapsed |