Patent US6187522B1 successfully refreshed from Google Patents.
US6187522B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Scratch resistant antistatic layer for imaging elements
Assignee: Eastman Kodak Co
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Filing: 1999-03-25
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Granted: 2001-02-13
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Expires: 2019-03-25
Abstract
Abstract The present invention is an imaging element having, a support, an image-forming layer superposed on the support and an outermost scratch resistant antistatic layer superposed on the support. The outermost scratch resistant antistatic layer has a thickness between 0.6 and 10 microns. The scratch resistant layer is composed of a polymer having a modulus greater than 100 MPa measured at 20° C. and a tensile elongation to break greater than 50%, a filler particle having a modulus greater than 10 GPa, and an electrically conducting polymer. The volume ratio of the polymer to the filler particle is between 70:30 and 40:60 and the electrically conducting polymer is present at a weight concentration based on a total dried weight of the scratch resistant layer of between 1 and 10 weight percent.
Inventors
- 👤 Debasis Majumdar
- 👤 Charles C. Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:54
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/14; G03G5/147; G03G5/14708; G03G5/14713; G03G5/14795; G03C; G03C1/00; G03C1/76; G03C1/7614; G03G5/14747; G03G5/14769; B; B41; B41M; B41M2205/00; B41M2205/40; G03C1/85; G03C2001/7628; G03C7/00; G03C7/30; G03C7/3022; G03C2007/3027
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
125 words
An imaging element comprising: a support; an image-forming layer superposed on the support; and an outermost scratch resistant antistatic layer superposed on the support having a thickness between 0.6 and 10 microns, the scratch resistant layer comprising a polymer having a modulus greater than 100 MPa measured at 20° C. and a tensile elongation to break greater than 50%, a filler particle having a modulus greater than 10 GPa, and an electrically conducting polymer comprising 3,4-dialkoxy substituted polythiophene styrene sulfonate; wherein the volume ratio of the polymer to the filler particle is between 70:30 and 40:60 and the electrically conducting polymer is present at a weight concentration based on a total dried weight of the scratch resistant layer of between 1 and 10 weight percent.
Claim 2
Dependent Claim
125 words
An imaging element comprising: a support; an image-forming layer superposed on the support; and an outermost scratch resistant antistatic layer superposed on the support having a thickness between 0.6 and 10 microns, the scratch resistant layer comprising a polymer having a modulus greater than 100 MPa measured at 20° C. and a tensile elongation to break greater than 50%, a filler particle having a modulus greater than 10 GPa, and an electrically conducting polymer comprising 3,4-dialkoxy substituted polythiophene styrene sulfonate; wherein the volume ratio of the polymer to the filler particle is between 70:30 and 40:60 and the electrically conducting polymer is present at a weight concentration based on a total dried weight of the scratch resistant layer of between 1 and 10 weight percent.
Claim 3
Dependent Claim
27 words
The imaging element of claim 1 wherein the filler particle having a modulus greater than 10 GPa comprises a refractive index less than or equal to 2.1.
Claim 4
Dependent Claim
28 words
The imaging element of claim 1 wherein the filler particle having a modulus greater than 10 GPa comprises a particle size less than or equal to 500 nm.
Claim 5
Dependent Claim
31 words
The imaging element of claim 1 wherein outermost scratch resistant antistatic layer further comprises crosslinking agents, surfactants, coating aids, coalescing aids, lubricants, dyes, biocides, UV stabilizers, thermal stabilizers or matte particles.
Claim 6
Dependent Claim
13 words
The imaging element of claim 1 wherein the filler particle comprises colloidal silica.
Claim 7
Dependent Claim
27 words
The imaging element of claim 1 wherein the electrically conducting polymer further comprises substituted pyrrole-containing polymers, unsubstituted pyrrole-containing polymers, substituted aniline-containing polymers, unsubstituted aniline-containing polymers or polyisothianapthene.
Claim 8
Dependent Claim
34 words
The imaging element of claim 1 wherein the polymer having a modulus greater than 100 MPa measured at 20° C. and a tensile elongation to break greater than 50% comprises polycarbonate, polyurethanes or polyolefins.
Claim 9
Dependent Claim
42 words
The imaging element of claim 1 wherein the filler particle having a modulus greater than 10 GPa comprises colloidal silica, colloidal tin oxide, colloidal titanium dioxide, mica, clays, doped-metal oxides, metal oxides containing oxygen deficiencies, metal antimonates, conductive nitrides, carbides, or borides.
Claim 10
Dependent Claim
35 words
The imaging element of claim 1 wherein the electrically conducting polymer is present at a weight concentration based on a total dried weight of the scratch resistant layer of between 2.5 and 5 weight percent.
Claim 11
Dependent Claim
18 words
The imaging element of claim 1 wherein the support is selected from a polymeric film, paper, or glass.
Claim 12
Dependent Claim
16 words
The imaging element of claim 1 wherein the imaging element has SER values ≦9.5 log Ω/.
Claim 13
Dependent Claim
13 words
The imaging element of claim 1 wherein the filler particle is amorphous silica.
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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) | 2004-02-13 | 2004-08-14 | 2005-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-02-13 | 2008-08-14 | 2009-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-02-13 | 2012-08-14 | 2013-02-13 | $7700.00 | Window Closed / Lapsed |