US3615418A
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Heterogeneous dye-binder photoconductive compositions
Assignee: Eastman Kodak Co
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Filing: 1969-06-20
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Granted: 1971-10-26
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Expires: 1989-06-20
Abstract
Abstract Heterogeneous compositions useful in electrophotography are formed from an electrically insulating polymeric material and pyrylium selenapyrylium or thiapyrylium dye salts having an inorganic anion the anionic radius of which is at least as large as the radius of hexafluorophosphate. The use of these dye salts results in extended stability of the coating dopes which stability facilitates coating procedures and results in more uniform coatings.
Inventors
- 👤 William J Staudenmayer
- 👤 James C Fleming
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:01
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0622; G03G5/0624; G03G5/0635; G03G5/0637
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
100 words
a composition as described in claim 1, wherein the dye has the formula: wherein: R1 and R2 are aryl radicals selected from the group consisting of phenyl and substituted phenyl having at least one substituent selected from the group consisting of an alkyl radical of from one to six carbon atoms and an alkoxy radical of from one to six carbon atoms; R3 is an alkylamino-substituted phenyl radical having from one to six carbon atoms in the alkyl moiety; X is selected from the group consisting of sulfur and oxygen; and Q is a Group VA element other than nitrogen.
Claim 2
Dependent Claim
112 words
A heterogeneous photoconductive composition for use in electrophotography comprising in a multiphase state (a) at least one dye selected from the group consisting of the hexafluorophosphate salt of a pyrylium dye and the hexafluorophosphate salt of a thiapyrylium dye and (b) an electrically insulating, film-forming, polymeric material having an alkylidene diarylene moiety in the recurring unit, said composition containing a discontinuous phase comprised of a combination of said dye and polymeric material, and a continuous phase composed of said polymeric material, said composition having a wavelength range of radiation absorption different from the wavelength range of absorption of a composition comprised of a substantially homogeneous combination of said dye and polymeric material.
Claim 3
Dependent Claim
91 words
A composition as described in claim 3 wherein the dye has the formula: wherein: R1 and R2 are aryl radicals selected from the group consisting of phenyl and substituted phenyl having at least one substituent selected from the group consisting of an alkyl radical of from one to six carbon atoms and an alkoxy radical of from one to six carbon atoms; R3 is an alkylamino-substituted phenyl radical having from one to six carbon atoms in the alkyl moiety; and X is selected from the group consisting of sulfur and oxygen.
Claim 4
Dependent Claim
28 words
A photoconductive composition as described in claim 3 wherein the dye is selected from the group consisting of 4-(4-dimethylaminophenyl)-2,6-diphenylthiapyrylium hexafluorophosphate, 4-(4-dimethylaminophenyl)-2 -(4-ethoxyphenyl)-6-phenylthiapyrylium hexafluorophosphate, 4-(4-dimethylaminophenyl)-2,6-diphenylpyrylium hexafluorophosphate and 4-(4-dimethylaminophenyl)-2-(4-ethoxyphenyl)-6-phenylpyrylium hexafluorophosphate.
Claim 5
Dependent Claim
137 words
A sensitized photoconductive composition comprising a photoconductor dispersed in a heterogeneous two-phase organic solid of dye and polymeric material, said solid having a continuous phase of said polymeric material and a discontinuous phase comprising a combination of (a) said polymeric material having an alkylidene diarylene moiety in a recurring unit and (b) at least one dye having the formula: wherein: R1 and R2 are aryl radicals selected from the group consisting of phenyl and substituted phenyl having at least one substituent selected from the group consisting of an alkyl radical of from one to six carbon atoms and an alkoxy radical of from one to six carbon atoms; R3 is an alkylamino-substituted phenyl radical having from one to six carbon atoms in the alkyl moiety; and X is selected from the group consisting of sulfur and oxygen.
Claim 6
Dependent Claim
85 words
A composition as described in claim 6 wherein the photoconductor is an organic material selected from the group consisting of a triarylamine, an organic derivative of a Group IIIA metal having at least one aminoaryl radical attached to the metal atom, an organic derivative of a Group IVA metal having at least one aminoaryl radical attached to the metal atom, an organic derivative of a Group VA metal having at Least one aminoaryl radical attached to the metal atom, a 4diarylamino-substituted chalcone and a polyarylalkane.
Claim 7
Dependent Claim
16 words
A photoconductive composition as described in claim 6 wherein the polymeric material is a carbonate resin.
Claim 8
Dependent Claim
35 words
A photoconductive composition as described in claim 8 wherein the photoconductor is an organic photoconductor and wherein the dye is selected from the group consisting of 4-(4-dimethylaminophenyl)-2,6-diphenylthiapyrylium hexafluorophosphate, 4-(4-dimethylaminophenyl)-2-(4-ethoxyphenyl)-6-phenylthiapyrylium hexafluorophosphate, 4-(4-dimethylaminophenyl)-2,6-diphenylpyrylium hexafluorophosphate and 4-(4-dimethylaminophenyl)-2-(4-ethoxyphenyl)-6-phenylpyrylium hexafluorophosphate.
Claim 9
Dependent Claim
45 words
A photoconductive composition as described in claim 7 wherein the polymeric material is a polycarbonate resin having an alkylidene diarylene moiety in the recurring unit and wherein the dye is selected from the group consisting of 4-(4-dimethylaminophenyl)-2,6-diphenylthiapyrylium hexafluorophosphate, 4-(4-dimethylaminophenyl)-2-(4-ethoxyphenyl)-6-phenylthiapyrylium hexafluorophosphate, 4-(4-dimethylaminophenyl)-2,6-diphenylpyrylium hexafluorophosphate and 4-(4-dimethylaminophenyl)-2-(4-ethoxyphenyl)-6-phenylpyrylium hexafluorophosphate.
Claim 10
Dependent Claim
21 words
A photoconductive composition as described in claim 10 wherein the polymeric material is poly(4,4''isopropylidenediphenyl carbonate) and wherein the photoconductor is 4,4''-benzylidenebis-(N,N-diethyl-m-toluidine).
Claim 11
Dependent Claim
32 words
In an electrophotographic process wherein an electrostatic charge pattern is formed on a photoconductive element, the improvement wherein said element has a layer of the photoconductive composition as described in claim 6.
Claim 12
Dependent Claim
19 words
An electrophotographic element comprising a support having thereon a photoconductive layer comprised of the composition described in claim 6.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |