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US4105447A
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Photoconductive insulating compositions including polyaryl hydrocarbon photoconductors
Assignee: Eastman Kodak Co
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Filing: 1975-07-14
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Granted: 1978-08-08
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Expires: 1995-07-14
Abstract
Abstract Polyaryl hydrocarbon photoconductors having the formula ##STR1## wherein: N IS AN INTEGER HAVING A VALUE OF 0 OR 1; Ar 1 and Ar 2 each represents an aryl group including substituted aryl such as an aryl group that is fused to other aromatic or nonaromatic ring systems; R 1 , R 2 , R 3 and R 4 each represents a hydrogen atom, an alkyl group or an aryl group including substituted aryl and, when n is 1 and R 1 and R 4 are each hydrogen, R 2 and R 3 are each aryl; are combined with a sensitizer for the photoconductor and an electrically insulating binder to produce photoconductive compositions. Useful electrophotographic elements include a support having thereon such photoconductive insulating compositions.
Inventors
- 👤 Charles J. Fox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:39
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0601; G03G5/0609; G03G5/0605; G03G5/0664; G03G5/0666; G03G5/0668
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
146 words
A photoconductive insulating composition comprising an admixture of an electrically insulating polymeric binder, a photoconductor having the formula ##STR4## wherein Ar 1 and Ar 2 , which can be the same or different, each represents a phenyl or a naphthyl group which is unsubstituted or substituted with alkyl or alkoxy having 1 to 10 carbon atoms; R 1 , R 2 , R 3 and R 4 , which can be the same or different, each represents a hydrogen atom, an alkyl group having 1 to 10 carbon atoms or a phenyl group and, when both R 1 and R 4 are hydrogen, both R 2 and R 3 are phenyl groups, and from about 0.001 to about 30% by weight of the total composition weight of a sensitizer for the photoconductor selected from the group consisting of a pyrylium dye salt and a Lewis acid.
Claim 2
Dependent Claim
146 words
A photoconductive insulating composition comprising an admixture of an electrically insulating polymeric binder, a photoconductor having the formula ##STR4## wherein Ar 1 and Ar 2 , which can be the same or different, each represents a phenyl or a naphthyl group which is unsubstituted or substituted with alkyl or alkoxy having 1 to 10 carbon atoms; R 1 , R 2 , R 3 and R 4 , which can be the same or different, each represents a hydrogen atom, an alkyl group having 1 to 10 carbon atoms or a phenyl group and, when both R 1 and R 4 are hydrogen, both R 2 and R 3 are phenyl groups, and from about 0.001 to about 30% by weight of the total composition weight of a sensitizer for the photoconductor selected from the group consisting of a pyrylium dye salt and a Lewis acid.
Claim 3
Dependent Claim
15 words
The photoconductive insulating composition of claim 1 wherein the sensitizer is a pyrylium dye salt.
Claim 4
Dependent Claim
14 words
The photoconductive insulating composition of claim 1 wherein the sensitizer is a Lewis acid.
Claim 5
Dependent Claim
18 words
The photoconductive insulating composition of claim 1 wherein the binder is substantially non-interfering with respect to the photoconductor.
Claim 6
Dependent Claim
20 words
The photoconductive insulating composition of claim 1 wherein the photoconductor is selected from the group consisting of 1,1,4,4-tetraphenyl-1,3-butadiene and 1,2,3,4-tetraphenyl-1,3-butadiene.
Claim 7
Dependent Claim
12 words
The photoconductive insulating composition of claim 1 wherein the photoconductor is 1,1,4,4-tetraphenyl-1,3-butadiene.
Claim 8
Dependent Claim
27 words
The photoconductive insulating composition of claim 6 wherein the sensitizer is selected from the group consisting of 2,4-di(4-ethoxyphenyl)-6-(4-n-amyloxystyryl)pyrylium fluoroborate, 2,6-bis(4-ethylphenyl)-4-(4-n-amyloxyphenyl)thiapyrylium perchlorate, 2,4,6-triphenylpyrylium fluoroborate, tetrachlorophthalic anhydride, and 2,4,7-trinitrofluorenone.
Claim 9
Dependent Claim
19 words
An electrophotographic element comprising an electrically conductive support having thereon a photoconductive insulating composition as described in claim 1.
Claim 10
Dependent Claim
19 words
An electrophotographic element comprising an electrically conductive support having thereon a photoconductive insulating composition as described in claim 2.
Claim 11
Dependent Claim
19 words
An electrophotographic element comprising an electrically conductive support having thereon a photoconductive insulating composition as described in claim 3.
Claim 12
Dependent Claim
19 words
An electrophotographic element comprising an electrically conductive support having thereon a photoconductive insulating composition as described in claim 4.
Claim 13
Dependent Claim
19 words
An electrophotographic element comprising an electrically conductive support having thereon a photoconductive insulating composition as described in claim 6.
Claim 14
Dependent Claim
19 words
An electrophotographic element comprising an electrically conductive support having thereon a photoconductive insulating composition as described in claim 7.
Claim 15
Dependent Claim
122 words
A photoconductive insulating composition comprising a mixture of an electrically insulating polymeric binder, a photoconductor having the formula ##STR5## wherein Ar 1 and Ar 2 , which can be the same or different, each represents a phenyl or a naphthyl group; R 1 , R 2 , R 3 and R 4 , which can be the same or different, each represents a hydrogen atom or a phenyl group, and, when both R 1 and R 4 are hydrogen, both R 2 and R 3 are phenyl groups, and from about 0.001 to about 30% by weight of the total composition weight of a sensitizer for the photoconductor selected from the group consisting of a pyrylium dye salt and a Lewis acid.
Claim 16
Dependent Claim
122 words
A photoconductive insulating composition comprising a mixture of an electrically insulating polymeric binder, a photoconductor having the formula ##STR5## wherein Ar 1 and Ar 2 , which can be the same or different, each represents a phenyl or a naphthyl group; R 1 , R 2 , R 3 and R 4 , which can be the same or different, each represents a hydrogen atom or a phenyl group, and, when both R 1 and R 4 are hydrogen, both R 2 and R 3 are phenyl groups, and from about 0.001 to about 30% by weight of the total composition weight of a sensitizer for the photoconductor selected from the group consisting of a pyrylium dye salt and a Lewis 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) | 1981-08-07 | 1982-02-06 | 1982-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-08-07 | 1986-02-06 | 1986-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-08-07 | 1990-02-06 | 1990-08-08 | $7700.00 | Window Closed / Lapsed |