Patent US4419399A successfully refreshed from Google Patents.
US4419399A
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Transparent conductive film
Assignee: Toyobo Co Ltd
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Filing: 1981-07-06
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Granted: 1983-12-06
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Expires: 2001-07-06
Abstract
Abstract A transparent conductive film comprising a synthetic resin film or sheet, particularly a phenoxyether type polymeric supporting film or sheet, having on one surface thereof a transparent conductive layer laminated by means of vacuume metal evaporation or the like, said film or sheet meeting certain requirements with respect to retardation value, heat distortion temperature, average visible light transmittance, water vapor permeability, Izod impact strength and degree of swelling in solvents.
Inventors
- 👤 Rinjiro Ichikawa
- 👤 Chiyoji Hitomi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:33
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1343; G02F1/13439; H; H01; H01R; H01R12/00; H01R12/50; H01R12/59; C; C09; C09K; C09K2323/00; C09K2323/04; G02F1/133305; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/24975; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/31504; Y10T428/31507; Y10T428/31511; Y10T428/31529; Y10T428/31533; Y10T428/31551; Y10T428/31605; Y10T428/31855; Y10T428/31909; Y10T428/31928; Y10T428/31935
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
116 words
A transparent conductive film comprising a polymeric supporting substrate in the form of a film or sheet having a transparent conductive layer formed on one surface of said substrate wherein said substrate is optically isotropic, has a thickness of 5 to 1000 microns, a retardation value of not more than 30 millimicrons, a heat distortion temperature of not lower than 80° C., an average visible light transmittance of not less than 75%, a water vapor permeability of not higher than 30 g/24 hr·m 2 , an Izod impact strength of not less than 1.5 kg·cm/cm and the degree of swelling on a surface having the transparent layer thereon of not more than 0.5% in a solvent.
Claim 2
Dependent Claim
116 words
A transparent conductive film comprising a polymeric supporting substrate in the form of a film or sheet having a transparent conductive layer formed on one surface of said substrate wherein said substrate is optically isotropic, has a thickness of 5 to 1000 microns, a retardation value of not more than 30 millimicrons, a heat distortion temperature of not lower than 80° C., an average visible light transmittance of not less than 75%, a water vapor permeability of not higher than 30 g/24 hr·m 2 , an Izod impact strength of not less than 1.5 kg·cm/cm and the degree of swelling on a surface having the transparent layer thereon of not more than 0.5% in a solvent.
Claim 3
Dependent Claim
24 words
The transparent conductive film according to claim 1, wherein said substrate has a critical width at flexural failure of not more than 5 mm.
Claim 4
Dependent Claim
50 words
The transparent conductive film according to claim 1 or 2, wherein at least one side of said substrate is cured after it is coated or impregnated with a curable synthetic resin and/or a monomer or monomer mixture, the so-formed cured layer having a thickness of from 1 to 10 microns.
Claim 5
Dependent Claim
112 words
The transparent conductive film according to claim 1 or 2, wherein said substrate is formed of a cross-linked phenoxyether polymer obtained by a cross-linking reaction between a polyfunctional compound and active hydrogen groups of a phenoxyether polymer having at least 20 units and not less than 50 weight percent of repeat units of the formula: ##STR4## wherein R 1 through R 6 are independently hydrogen or a lower alkyl group having 1 to 3 carbon atoms, R 7 is a lower alkylene having 2 to 4 carbon atoms and m is an integer of 0 to 3, or a mixture consisting predominantly of said phenoxyether polymer and one or more other polymers.
Claim 6
Dependent Claim
25 words
The transparent conductive film according to claim 4, wherein said phenoxyether polymer has the formula: ##STR5## wherein n is an integer of 50 to 800.
Claim 7
Dependent Claim
41 words
The transparent conductive film according to claim 3 wherein the monomer and/or curable polymer is mainly composed of an acryloyl or methacryloyl compound containing at least 50% of a monomer having at least 3 acryloyloxy and/or methacryloyloxy groups in a molecule.
Claim 8
Dependent Claim
98 words
The transparent conductive film according to claim 3, wherein said curable synthetic resin is a mixture of polyfunctional compound and phenoxyether polymer having at least 20 units and not less than 50 weight percent of repeat units of the formula: ##STR6## wherein R 2 through R 6 are independently hydrogen or a lower alkyl group having 1 to 3 carbon atoms, R 7 is a lower alkylene group having 2 to 4 carbon atoms and m is an integer of 0 to 3, or a mixture consisting predominantly of said phenoxyether polymer and one or more other polymers.
Claim 9
Dependent Claim
29 words
The transparent conductive film according to claim 3, wherein said curable syntehtic resin consists of an epoxy resin or a mixture thereof with other polymers and a curing agent.
Claim 10
Dependent Claim
27 words
The transparent conductive film according to claim 3, wherein said substrate is formed of a polymeric material selected from the group consisting of polyethersulfones, polysulfones and polyacrylates.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-12-05 | 1987-06-06 | 1987-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-05 | 1991-06-06 | 1991-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-05 | 1995-06-06 | 1995-12-06 | $7700.00 | Window Closed / Lapsed |