Patent US4415626A successfully refreshed from Google Patents.
US4415626A
Expired / Lapsed
US
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Antistatic composition and elements and processes utilizing same
Assignee: Eastman Kodak Co
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Filing: 1982-01-08
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Granted: 1983-11-15
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Expires: 2002-01-08
Abstract
Abstract An antistatic composition useful to reduce the propensity of multilayer elements to accumulate static electrical charge comprises an aqueous dispersion of (a) a film-forming binder; (b) a hardener for the binder; (c) a substantially transparent matting agent having particles with a diameter in the range of from about 1 to about 50 microns and a specific gravity substantially the same as that of water; (d) a highly electrically conductive, noncrystallizable conductivity agent; and (e) a charge control agent. This antistatic composition is especially useful as an image-receiving layer on substantially transparent image-receiving elements. Such image-receiving elements can be formed into projection-viewable transparencies by an electrographic copy process, which transparencies are considerably less likely to stick to one another or jam in electrographic copier/duplicator equipment than currently available transparencies.
Inventors
- 👤 Charles R. Hasenauer
- 👤 Donald N. Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:10
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/10; G03C; G03C1/00; G03C1/76; G03C1/85; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10T; Y10T428/00; Y10T428/25; Y10T428/254; Y10T428/31; Y10T428/31504; Y10T428/31786; Y10T428/31797; Y10T428/31855; Y10T428/31909
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
75 words
A substantially transparent electrographic image-receiving element comprising a substantially transparent polymeric support having on each side thereof a non-tacky, electrically conductive layer, each of said electrically conductive layers comprising (a) a film-forming binder; (b) a hardener for said binder; (c) a substantially transparent matting agent having particles with a diameter in the range of from about 1 to about 50 microns; (d) a highly electrically conductive, noncrystallizable conductivity agent; and (e) a charge control agent.
Claim 2
Dependent Claim
75 words
A substantially transparent electrographic image-receiving element comprising a substantially transparent polymeric support having on each side thereof a non-tacky, electrically conductive layer, each of said electrically conductive layers comprising (a) a film-forming binder; (b) a hardener for said binder; (c) a substantially transparent matting agent having particles with a diameter in the range of from about 1 to about 50 microns; (d) a highly electrically conductive, noncrystallizable conductivity agent; and (e) a charge control agent.
Claim 3
Dependent Claim
21 words
The electrographic image-receiving element of claim 1 having a subbing layer between said support and each of said electrically conductive layers.
Claim 4
Dependent Claim
38 words
The electrographic image-receiving element of claim 1, wherein each of said electrically conductive layers has a surface resistivity of from about 1×10 10 to about 1×10 12 ohms per square when measured at 21° C. and 50% R.H.
Claim 5
Dependent Claim
38 words
The electrographic image-receiving element of claim 1, wherein each of said electrically conductive layers has a surface resistivity of from about 5×10 10 to about 5×10 11 ohms per square when measured at 21° C. and 50% R.H.
Claim 6
Dependent Claim
29 words
The electrographic image-receiving element of claim 1, wherein said binder is a synthetic polymer resin selected from the group consisting of poly(vinyl alcohol), poly(vinyl acetate), carboxymethylcellulose and carboxymethyl hydroxyethylcellulose.
Claim 7
Dependent Claim
15 words
The electrographic image-receiving element of claim 1, wherein said hardener is a Werner chromium complex.
Claim 8
Dependent Claim
23 words
The electrographic image-receiving element of claim 1, wherein said matting agent particles comprise an addition polymer prepared from an ethylenically unsaturated polymerizable monomer.
Claim 9
Dependent Claim
30 words
The electrographic image-receiving element of claim 1, wherein said matting agent particles are substantially spherical and have a diameter in the range of from about 2 to about 25 microns.
Claim 10
Dependent Claim
30 words
The electrographic image-receiving element of claim 1, wherein said matting agent particles are substantially spherical and have a diameter in the range of from about 8 to about 12 microns.
Claim 11
Dependent Claim
15 words
The electrographic image-receiving element of claim 1, wherein said conductivity agent comprises an anionic polymer.
Claim 12
Dependent Claim
23 words
The electrographic image-receiving element of claim 1, wherein said conductivity agent is a polymeric carboxylic acid or alkali metal or ammonium salt thereof.
Claim 13
Dependent Claim
19 words
The electrographic image-receiving element of claim 1, wherein said charge control agent is an anionic fluorinated surface active agent.
Claim 14
Dependent Claim
17 words
The electrographic image-receiving element of claim 1, wherein said charge control agent is a fluorinated alkyl sulfonate.
Claim 15
Dependent Claim
122 words
A substantially transparent electrographic image-receiving element comprising a substantially transparent polymeric support having on each side, in order outward from said support, a subbing layer and a non-tacky, electrically conductive layer with a surface resistivity of from about 5×10 10 to about 5×10 11 ohms per square when measured at 21° C. and 50% R.H., each of said electrically conductive layers comprising (a) poly(vinyl alcohol); (b) methacrylatochromic chloride; (c) substantially transparent matting agent particles with a diameter in the range of from about 8 to 12 microns and comprising an addition polymer prepared from at least one ethylenically unsaturated polymerizable monomer; (d) an alkali metal salt of a polymeric carboxylic acid; and (e) an ammonium salt of a fluorinated alkyl sulfonic acid.
Claim 16
Dependent Claim
122 words
A substantially transparent electrographic image-receiving element comprising a substantially transparent polymeric support having on each side, in order outward from said support, a subbing layer and a non-tacky, electrically conductive layer with a surface resistivity of from about 5×10 10 to about 5×10 11 ohms per square when measured at 21° C. and 50% R.H., each of said electrically conductive layers comprising (a) poly(vinyl alcohol); (b) methacrylatochromic chloride; (c) substantially transparent matting agent particles with a diameter in the range of from about 8 to 12 microns and comprising an addition polymer prepared from at least one ethylenically unsaturated polymerizable monomer; (d) an alkali metal salt of a polymeric carboxylic acid; and (e) an ammonium salt of a fluorinated alkyl sulfonic acid.
Claim 17
Dependent Claim
15 words
The electrographic image-receiving element of claim 14, wherein said support is a poly(ethylene terephthalate) film.
Claim 18
Dependent Claim
175 words
The electrographic image-receiving element of claim 14, wherein said addition polymer is prepared from at least one of the following ethylenically unsaturated polymerizable monomers: (a) up to 100 weight percent of an amino-free styrene; (b) up to about 25 weight percent of an acrylic acid ester; (c) up to 100 weight percent of a methacrylic acid ester; (d) up to about 30 weight percent of a carboxylic acid containing one or more ethylenically unsaturated polymerizable groups; (e) up to about 75 weight percent of a nitrile containing one or more ethylenically unsaturated polymerizable groups; (f) up to about 20 weight percent of an amine-substituted styrene; (g) up to about 20 weight percent of monomer containing a crosslinkable group; (h) up to about 20 weight percent of a tertiary aminoalkyl acrylate or methacrylate; (i) up to 100 weight percent of an N-heterocyclic vinyl monomer; (j) up to about 20 weight percent of an acrylamide or methacrylamide; and (k) up to about 20 weight percent of a crosslinkable monomer containing at least two ethylenically unsaturated polymerizable groups.
Claim 19
Dependent Claim
21 words
The electrographic image-receiving element of claim 16, wherein said addition polymer is prepared from vinyl toluene, t-butyl styrene and methacrylic acid.
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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) | 1986-11-14 | 1987-05-16 | 1987-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-14 | 1991-05-16 | 1991-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-14 | 1995-05-16 | 1995-11-15 | $7700.00 | Window Closed / Lapsed |