US4486549A
Expired / Lapsed
US
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Process for preparing an amino group-containing polyacrylonitrile polymer
Assignee: Asahi Kasei Corp
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Filing: 1983-06-16
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Granted: 1984-12-04
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Expires: 2003-06-16
Abstract
Abstract Acrylonitrile polymer containing amino groups and having a porous structure containing micro-pores with an average size of from 50 to 2000 Å and pore volume of not less than 0.2 cm 3 /g is prepared by reducing an acrylonitrile polymer having said porous structure in an inert non-solvent for said polymer with lithium aluminum hydride. The polymer obtained is useful as a carrier for enzymes.
Inventors
- 👤 Kunio Matsumoto
- 👤 Rokuro Izumi
- 👤 Hideji Seijo
- 👤 Hiroyuki Mizuguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:24
CPC Classifications
C; C12; C12N; C12N9/00; C12N9/0004; C12N9/0006; C08; C08F; C08F8/00; C08F8/30; C12N11/00; C12N11/02; C12N11/08; C12N11/082; C12N11/087; C12N9/14; C12N9/16; C12N9/78; C12N9/80; C12N9/84; C12P; C12P35/00; C12P35/02; C12P37/00; C12P37/06
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
59 words
A process for producing an acrylonitrile polymer containing amino groups and having a porous structure containing micro-pores with an average size of from 50 to 2000 Å and pore volume of not less than 0.2 cm 3 /g, which comprises reducing an acrylonitrile polymer having said porous structure in an inert non-solvent for said polymer with lithium aluminum hydride.
Claim 2
Dependent Claim
59 words
A process for producing an acrylonitrile polymer containing amino groups and having a porous structure containing micro-pores with an average size of from 50 to 2000 Å and pore volume of not less than 0.2 cm 3 /g, which comprises reducing an acrylonitrile polymer having said porous structure in an inert non-solvent for said polymer with lithium aluminum hydride.
Claim 3
Dependent Claim
25 words
A process according to claim 1, wherein the acrylonitrile polymer is in the form of a fiber, a particle, a membrane or a hollow filament.
Claim 4
Dependent Claim
31 words
A process according to claim 1, wherein the acrylonitrile polymer is a polymer of an acrylonitrile monomer of a copolymer of said monomer with a comonomer having ethylenically unsaturated double bond.
Claim 5
Dependent Claim
16 words
A process according to claim 3, wherein the acrylonitrile monomer is acrylonitrile, methacrylonitrile, α-chloroacrylonitrile of cinnamnitrile.
Claim 6
Dependent Claim
47 words
A process according to claim 3, wherein the comonomer is a styrene monomer, an acrylic acid ester monomer, a conjugated diene, a halogenated olefin, a vinyl ether monomer, a vinyl ketone monomer, a vinyl ester monomer, an amide vinyl monomer, a basic monomer or a polyfunctional monomer.
Claim 7
Dependent Claim
54 words
A process according to claim 3, wherein the acrylonitrile polymer has a porous structure with micro-pores having sizes distributed in the range form about 100 to 1,000 Å and is constituted of polyacrylonitrile containing 90% or more of acrylonitrile shaped in the form of a fiber, a particle, a membrane or a hollow filament.
Claim 8
Dependent Claim
37 words
A process according to claim 3, wherein the acrylonitrile polymer is a copolymer consisting of acrylonitrile, divinyl benzene and vinyl ethyl benzene shaped in the form of a fiber, a particle, a membrane or a hollow filament.
Claim 9
Dependent Claim
27 words
A process according to claim 1, wherein the non-solvent is an organic solvent which does not dissolve an acrylonitrile polymer and an acrylonitrile polymer containing amino groups.
Claim 10
Dependent Claim
16 words
A process according to claim 8, wherein the organic solvent is diethyl ether, dioxane or tetrahydrofuran.
Claim 11
Dependent Claim
28 words
A process according to claim 1, wherein the reduction is effected to an extent which does not make the acrylonitrile polymer containing amino groups substantially soluble in water.
Claim 12
Dependent Claim
18 words
A process according to claim 10, wherein the reduction is carried out for 10 minutes to 30 hours.
Claim 13
Dependent Claim
26 words
A process according to claim 1, wherein the acrylonitrile polymer contains amino groups in an amount which does not make the polymer substantially soluble in water.
Claim 14
Dependent Claim
24 words
A process according to claim 12, wherein the acrylonitrile polymer contains 20 μM to 1000 μM of amino groups per gram of the polymer.
Claim 15
Dependent Claim
28 words
A process according to claim 1, wherein the acrylonitrile polymer has a porous structure with micro-pores having sizes distributed in the range from about 100 to 1,000 Å.
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) | 1987-12-04 | 1988-06-04 | 1988-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-04 | 1992-06-04 | 1992-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-04 | 1996-06-04 | 1996-12-04 | $7700.00 | Window Closed / Lapsed |