US5205965A
Expired / Lapsed
US
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Organic polymer solution
Assignee: Nitto Denko Corp
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Filing: 1992-01-21
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Granted: 1993-04-27
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Expires: 2012-01-21
Abstract
Abstract An organic polymer solution comprising an organic solvent and, dissolved therein, (a) an organic polymer which has an imino-p-phenylene structural unit of the formula ##STR1## as a major repeating unit and is organic solvent-soluble, (b) a protonic acid having a pK a value of 4.8 or less or a derivative thereof, (c) at least one member selected from the group consisting of an oxidizing agent which does not have oxidizing ability at ordinary temperature but has oxidizing ability at temperatures not lower than 60° C., and an oxidation catalyst.
Inventors
- 👤 Yoshihiro Uetani
- 👤 Masao Abe
- 👤 Akira Ohtani
- 👤 Minoru Ezoe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:20
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/02; C08G73/026; C08G73/0266; C08L; C08L79/00; H; H01; H01B; H01B1/00; H01B1/06; H01B1/12; H01B1/124; H01B1/128
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
162 words
An organic polymer solution comprising an organic solvent and, dissolved therein, (a) an organic polymer which has an imino-p-phenylene structural unit of the formula ##STR14## as a major repeating unit and is organic solvent-soluble, (b) a protonic acid having a pK a value of 4.8 or less or a derivative thereof, (c) at least one oxidizing agent which does not have oxidizing ability at ordinary temperature but has oxidizing ability at temperatures not lower than 60° C., selected from the group consisting of a thiuram-type compound represented by the formula ##STR15## wherein Ra, Rb, Rc, and Rd each independently represents an alkyl group and x is an integer of from 1 to 6, a sulfenamide-type compound represented by the formula ##STR16## wherein Re and Rf each independently represents hydrogen atom, an alkyl group, or an alkylene group, or an oxime-type compound represented by the formula ##STR17## wherein Rg and Rh each independently represents hydroxyl group or benzoyl group and an oxidation catalyst.
Claim 2
Dependent Claim
162 words
An organic polymer solution comprising an organic solvent and, dissolved therein, (a) an organic polymer which has an imino-p-phenylene structural unit of the formula ##STR14## as a major repeating unit and is organic solvent-soluble, (b) a protonic acid having a pK a value of 4.8 or less or a derivative thereof, (c) at least one oxidizing agent which does not have oxidizing ability at ordinary temperature but has oxidizing ability at temperatures not lower than 60° C., selected from the group consisting of a thiuram-type compound represented by the formula ##STR15## wherein Ra, Rb, Rc, and Rd each independently represents an alkyl group and x is an integer of from 1 to 6, a sulfenamide-type compound represented by the formula ##STR16## wherein Re and Rf each independently represents hydrogen atom, an alkyl group, or an alkylene group, or an oxime-type compound represented by the formula ##STR17## wherein Rg and Rh each independently represents hydroxyl group or benzoyl group and an oxidation catalyst.
Claim 3
Dependent Claim
33 words
An organic polymer solution as claimed in claim 1, wherein said oxidation catalyst is at least one member selected from the group consisting of stearates, naphthenates, and acetylacetonates of cobalt, iron, or manganese.
Claim 4
Dependent Claim
30 words
An organic polymer solution as claimed in claim 1, wherein said organic polymer has an intrinsic viscosity [η] of 0.40 dl/g or more as measured at 30° C. in N-methyl-2-pyrrolidone.
References Cited (Backward Citations)
US4615829A
Cited
EP0361429A2
Cited
JPH02211230A
Cited
US5079096A
Cited
US5008041A
Cited
US5095076A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-04-26 | 1996-10-26 | 1997-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-04-26 | 2000-10-26 | 2001-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-04-26 | 2004-10-26 | 2005-04-27 | $7700.00 | Window Closed / Lapsed |