US4802745A
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Light-polarizing films
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1987-05-26
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Granted: 1989-02-07
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Expires: 2007-05-26
Abstract
Abstract A light-polarizing film is disclosed, comprising a conductive polymer having dichroism and having an unsaturated cyclic structure in the main chain thereof. The light-polarizing film of the invention has good polarization quality and is excellent in durability under high-temperature and high-humidity conditions.
Inventors
- 👤 Toyokazu Okada
- 👤 Koji Higashi
- 👤 Satoshi Taguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:41
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/18; C08G; C08G61/00; C08G61/12; C08G61/122; C08G61/123; H; H01; H01B; H01B1/00; H01B1/06; H01B1/12; H01B1/124; H01B1/127; H01B1/128; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/31909
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
214 words
A light-polarizing film as comprising a uniaxially oriented conductive polymer having about 81% or more of a polarizing co-efficient in the wavelength having a minimum transmittance in the range of from 400 to 700 μm, said uniaxially oriented conductive polymer represented by formula (VI) ##STR9## wherein X represents a sulfur atom or an oxygen atom; R 1 and R 2 , which may be the same or different, each represents a hydrogen atom, an alkyl group having from 1 to 4 carbon atoms, a nitrile group, a halogen atom, or a trihalomethyl group; and n represents an integer of at least 5, and, wherein the conductive polymer represented by formula (VI) is obtained from a conductive polymer precursor represented by formula (I): ##STR10## wherein X represents a sulfur atom or an oxygen atom; R 1 and R 2 , which may be the same or different, each represents a hydrogen atom, an alkyl group having from 1 to 4 carbon atoms, a nitrile group, a halogen atom, or a trihalomethyl group; R 3 and R 4 , which may be the same or different, each represents a hydrogen atom or an alkyl group having from 1 to 4 carbon atoms; Z - represents an anion; and n represents an integer of at least 5.
Claim 2
Dependent Claim
214 words
A light-polarizing film as comprising a uniaxially oriented conductive polymer having about 81% or more of a polarizing co-efficient in the wavelength having a minimum transmittance in the range of from 400 to 700 μm, said uniaxially oriented conductive polymer represented by formula (VI) ##STR9## wherein X represents a sulfur atom or an oxygen atom; R 1 and R 2 , which may be the same or different, each represents a hydrogen atom, an alkyl group having from 1 to 4 carbon atoms, a nitrile group, a halogen atom, or a trihalomethyl group; and n represents an integer of at least 5, and, wherein the conductive polymer represented by formula (VI) is obtained from a conductive polymer precursor represented by formula (I): ##STR10## wherein X represents a sulfur atom or an oxygen atom; R 1 and R 2 , which may be the same or different, each represents a hydrogen atom, an alkyl group having from 1 to 4 carbon atoms, a nitrile group, a halogen atom, or a trihalomethyl group; R 3 and R 4 , which may be the same or different, each represents a hydrogen atom or an alkyl group having from 1 to 4 carbon atoms; Z - represents an anion; and n represents an integer of at least 5.
Claim 3
Dependent Claim
112 words
A light-polarizing film comprising a uniaxially oriented conductive polymer having about 81% or more of a polarizing co-efficient in the wavelength having a minimum transmittance in the range of from 400 to 700 μm, wherein the conductive polymer is a conductive polymer having dichrosim and represented by formula (VII): ##STR11## wherein n represents an integer of at least 5; and wherein the conductive polymer represented by formula (VII) is obtained from a conductive polymer precursor represented by formula (II) or (III): ##STR12## wherein n represents an integer of at least 5; and in formula (III), R 5 represents a hydrogen atom or an alkyl group having from 1 to 4 carbon atoms.
Claim 4
Dependent Claim
112 words
A light-polarizing film comprising a uniaxially oriented conductive polymer having about 81% or more of a polarizing co-efficient in the wavelength having a minimum transmittance in the range of from 400 to 700 μm, wherein the conductive polymer is a conductive polymer having dichrosim and represented by formula (VII): ##STR11## wherein n represents an integer of at least 5; and wherein the conductive polymer represented by formula (VII) is obtained from a conductive polymer precursor represented by formula (II) or (III): ##STR12## wherein n represents an integer of at least 5; and in formula (III), R 5 represents a hydrogen atom or an alkyl group having from 1 to 4 carbon atoms.
Claim 5
Dependent Claim
46 words
A light-polarizing film as claimed in claim 1, wherein the conductive polymer is used as a uniaxially oriented conductive polymer obtained by adsorbing or laminating the conductive polymer on a base polymer, or mixing the conductive polymer with a base polymer and uniaxially orienting the polymer.
Claim 6
Dependent Claim
52 words
A light-polarizing film as claimed in claim 1, wherein the conductive polymer is used as a uniaxially oriented conductive polymer obtained by adsorbing or laminating the conductive polymer precursor on a base polymer or mixing the conductive polymer precursor with a base polymer and subjecting to uniaxial stretching and a releasing treatment.
Claim 7
Dependent Claim
23 words
A light-polarizing film as claimed in claim 1, wherein the conductive polymer further contains an electron attractive compound or an electron donative compound.
Claim 8
Dependent Claim
21 words
A light-polarizing film as claimed in claim 6, wherein the conductive polymer is used together with one or more dichroic dyes.
Claim 9
Dependent Claim
46 words
A light-polarizing film as claimed in claim 2, wherein the conductive polymer is used as a uniaxially oriented conductive polymer obtained by adsorbing or laminating the conductive polymer on a base polymer, or mixing the conductive polymer with a base polymer and uniaxially orienting the polymer.
Claim 10
Dependent Claim
42 words
A light-polarizing film as claimed in claim 2, wherein the conductive polymer is used as a uniaxially oriented conductive polymer obtained by adsorbing or laminating the conductive polymer precursor with a base polymer and subjecting to uniaxially stretching and a releasing treatment.
Claim 11
Dependent Claim
23 words
A light-polarizing film as claimed in claim 2, wherein the conductive polymer further contains an electron attractive compound or an electron donative compound.
Claim 12
Dependent Claim
21 words
A light-polarizing film as claimed in claim 2, wherein the conductive polymer is used together with one or more dichroic dyes.
References Cited (Backward Citations)
US2173304A
Cited
US2400877A
Cited
US2612079A
Cited
US3401152A
Cited
US3532643A
Cited
JPS4619196Y1
Cited
US4229498A
Cited
US4387133A
Cited
US4508639A
Cited
US4564545A
Cited
US4626304A
Cited
US4528118A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-02-07 | 1992-08-08 | 1993-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-07 | 1996-08-08 | 1997-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-07 | 2000-08-08 | 2001-02-07 | $7700.00 | Window Closed / Lapsed |