US5710187A
Expired / Lapsed
US
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Highly cross-linked nanoporous polymers
Assignee: Los Alamos National Security LLC
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Filing: 1995-11-29
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Granted: 1998-01-20
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Expires: 2015-11-29
Abstract
Abstract Condensation polymerization followed by a supercritical extraction step can be used to obtain highly cross-linked nanoporous polymers with high surface area, controlled pore sizes and rigid structural integrity. The invention polymers are useful for applications requiring separation membranes.
Inventors
- 👤 Warren P. Steckle, Jr.
- 👤 Paul G. Apen
- 👤 Michael A. Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:34
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/28; B; B01; B01D; B01D67/00; B01D67/0002; B01D67/0023; B01D67/003; B01D71/00; B01D71/06; B01D71/28; B01D71/281; B01D71/72; C08F; C08F212/00; C08F212/02; C08F212/04; C08J11/00; C08J11/04; C08J11/06; C08J11/08; B01D2323/00; B01D2323/219; B01D2323/225; B01D2323/30; C08J2201/00; C08J2201/04; C08J2201/05; C08J2201/0504; C08J2325/00; C08J2325/02; C08J2325/04; C08J2325/06; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/54; Y02W; Y02W30/00; Y02W30/50; Y02W30/62
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
74 words
A cross-linked nanoporous polymer prepared by a process comprising: (a) combining under polymerization conditions at least one aromatic monomer and a cross-linking agent chosen from the group of multifunctional acyl halides and benzylic halides; (b) allowing polymerization to occur until a copolymer gel is formed; (c) removing catalysts and unreacted monomers from said copolymer gel; (d) adding liquid carbon dioxide to said copolymer gel; and (e) removing said liquid carbon dioxide under supercritical conditions.
Claim 2
Dependent Claim
74 words
A cross-linked nanoporous polymer prepared by a process comprising: (a) combining under polymerization conditions at least one aromatic monomer and a cross-linking agent chosen from the group of multifunctional acyl halides and benzylic halides; (b) allowing polymerization to occur until a copolymer gel is formed; (c) removing catalysts and unreacted monomers from said copolymer gel; (d) adding liquid carbon dioxide to said copolymer gel; and (e) removing said liquid carbon dioxide under supercritical conditions.
Claim 3
Dependent Claim
78 words
A cross-linked nanoporous polymer as recited in claim 1 wherein said at least one aromatic monomer is one chosen from the group of benzene, biphenyl, diphenylmethane, 1,3,5-triphenylbenzene, m-terphenyl, bibenzyl, pyrene, napthalene, anthracene, triphenylene, tetraphenylmethane, triptycene; and macromonomers based on 2,6-dimethylphenylene oxide, styrene; methylphenyl siloxane; and mixtures of styrene with polymerizable alkenes; carborane and metallocenes; and said at least one cross-linking agent is one chosen from the group of ortho-, meta- and para-dichloroxylene, and chloromethylstyrene, 4,4'-dichloromethyl-biphenyl and terephathaloyl chloride.
Claim 4
Dependent Claim
31 words
A cross-linked nanoporous polymer as recited in claim 1 wherein said at least one aromatic monomer is one chosen from the group of styrene, bibenzyl, biphenyl, diphenylmethane, triphenylbenzene, diphenylmethane and benzene.
Claim 5
Dependent Claim
18 words
A cross-linked nanoporous polymer as recited in claim 1 wherein said at least one aromatic monomer is styrene.
Claim 6
Dependent Claim
18 words
A cross-linked nanoporous polymer as recited in claim 1 wherein said at least one cross-linking agent is dichloroxylene.
Claim 7
Dependent Claim
17 words
A cross-linked nanoporous thermosetting polymer as recited in claim 1 suitable for use as a separations membrane.
Claim 8
Dependent Claim
16 words
A cross-linked nanoporous polymer as recited in claim 1 suitable for use as a separations membrane.
References Cited (Backward Citations)
US4224415A
Cited
US4224415B1
Cited
US3322695A
Cited
US3767600A
Cited
US3969325A
Cited
US4667417A
Cited
US4806246A
Cited
US5069945A
Cited
US4857630A
Cited
US4987157A
Cited
US5116883A
Cited
US5066684A
Cited
US5049328A
Cited
US5158986A
Cited
US5334356A
Cited
US5081163A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-01-19 | 2001-07-21 | 2002-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-01-19 | 2005-07-21 | 2006-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-01-19 | 2009-07-21 | 2010-01-20 | $7700.00 | Window Closed / Lapsed |