US4644043A
Expired / Lapsed
US
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Fluorine-containing polymer for gas separating membrane
Assignee: Daikin Industries Ltd
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Filing: 1985-10-29
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Granted: 1987-02-17
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Expires: 2005-10-29
Abstract
Abstract This invention provides a polymer of alpha -fluoroacrylate derivative having a structural unit represented by the formula <IMAGE> (1) wherein X is fluorine or fluoroalkyl having 1 to 3 carbon atoms, m is an integer of 1 to 3 and n is an integer of 0 to 5.
Inventors
- 👤 Akira Ohmori
- 👤 Takashi Yasuhara
- 👤 Naoaki Izutani
- 👤 Yasufumi Ueda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:37
CPC Classifications
B; B01; B01D; B01D71/00; B01D71/06; B01D71/40; C; C08; C08F; C08F20/00; C08F20/02; C08F20/10; C08F20/26; C08F20/28
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
110 words
An α-fluoroacrylate polymer comprising: (1) 50 to 100% by weight of a structural unit represented by the formula ##STR27## wherein X is fluorine or fluoroalkyl having 1 to 3 carbon atoms, m is an integer of 1 to 3 and n is an integer of 0 to 5, and (2) up to 50% by weight of at least one of (i) a structural unit represented by the formula ##STR28## wherein Y is hydrogen, fluorine or methyl, R is alkylene having 1 to 5 carbon atoms or fluoroalkylene and Z is hydroxyl, glycidyl or carboxyl, and (ii) a structural unit represented by the formula ##STR29## wherein Y is as defined above.
Claim 2
Dependent Claim
110 words
An α-fluoroacrylate polymer comprising: (1) 50 to 100% by weight of a structural unit represented by the formula ##STR27## wherein X is fluorine or fluoroalkyl having 1 to 3 carbon atoms, m is an integer of 1 to 3 and n is an integer of 0 to 5, and (2) up to 50% by weight of at least one of (i) a structural unit represented by the formula ##STR28## wherein Y is hydrogen, fluorine or methyl, R is alkylene having 1 to 5 carbon atoms or fluoroalkylene and Z is hydroxyl, glycidyl or carboxyl, and (ii) a structural unit represented by the formula ##STR29## wherein Y is as defined above.
Claim 3
Dependent Claim
26 words
A polymer as defined in claim 1 which has a weight average molecular weight of about 500,000 to about 1,500,000 as measured by gel permeation chromatography.
Claim 4
Dependent Claim
116 words
A gas separating membrane consisting essentially of α-fluoroacrylate polymer comprising: (1) 50 to 100% by weight of a structural unit represented by the formula ##STR30## wherein X is fluorine or fluoroalkyl having 1 to 3 carbon atoms, m is an integer of 1 to 3 and n is an integer of 0 to 5, and (2) up to 50% by weight of at least one of (i) a structural unit represented by the formula ##STR31## wherein Y is hydrogen, fluorine or methyl, R is alkylene having 1 to 5 carbon atoms or fluoroalkylene and Z is hydroxyl, glycidyl or carboxyl, and (ii) a structural unit represented by the formula ##STR32## wherein Y is as defined above.
Claim 5
Dependent Claim
116 words
A gas separating membrane consisting essentially of α-fluoroacrylate polymer comprising: (1) 50 to 100% by weight of a structural unit represented by the formula ##STR30## wherein X is fluorine or fluoroalkyl having 1 to 3 carbon atoms, m is an integer of 1 to 3 and n is an integer of 0 to 5, and (2) up to 50% by weight of at least one of (i) a structural unit represented by the formula ##STR31## wherein Y is hydrogen, fluorine or methyl, R is alkylene having 1 to 5 carbon atoms or fluoroalkylene and Z is hydroxyl, glycidyl or carboxyl, and (ii) a structural unit represented by the formula ##STR32## wherein Y is as defined above.
Claim 6
Dependent Claim
31 words
A gas separating membrane as defined in claim 3 which comprises a polymer having a weight average molecular weight of about 500,000 to about 1,500,000 as measured by gel permeation chromatography.
References Cited (Backward Citations)
US4259407A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1990-02-16 | 1990-08-18 | 1991-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-16 | 1994-08-18 | 1995-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-16 | 1998-08-18 | 1999-02-17 | $7700.00 | Window Closed / Lapsed |