Claims
- 1. An electrophoretic migration imaging dispersion comprising an electrically insulating carrier, a charge control agent and an electrically photosensitive material having the following structure: ##STR28## wherein n equal 1 or 2;
- A represents phenylene, napthylene, anthracenyl, anthracenediyl, and dibenzothien-diyl;
- R.sub.1 and R.sub.2, which may be the same or different when taken along, represent hydrogen, cyano, alkylcarbonyl and arylcarbamoyl, arylcarbonyl, cyanoaryl;
- R.sub.1 and R.sub.2, when taken together, represent sufficient atoms to form substituted and unsubstituted radicals selected from the group consisting of furanylidene, fluorenylidene, pyrimidinylidene, thiazolidinylidene, pyrrolinyl, indenyl, isoxazolinylidene, pyrazolinylidene and indanylidene, wherein said substituents are selected from the group consisting of hydrogen, cyano, aryl, oxo, thioxo, nitro, alkyl, nitroaryl, carbamoyl and cyanoalkyl;
- alkyl, represents an alkyl group having from one to six carbon atoms;
- aryl, represents an aromatic nucleus selected from the group consisting of benzene, napthalene or anthracene; except that when:
- (A) A represents an anthracene nucleus and
- (i) R.sub.1 and R.sub.2 when taken together represent 1,3,-5-trihydro-2,4,6-trioxo-pyrimidin-5-ylidene; 3-cyano-4-phenyl-2-oxopyrrolin-5-ylidene; or 3-carboxyinden-1-ylidene; or
- (ii) R.sub.1 taken alone represents cyano and R.sub.2 represents methyl sulfonyl, phenylcarbamoyl or ethoxycarbonyl; or
- (iii) either R.sub.1 or R.sub.2 is alkylcarbonyl or phenylcarbonyl; then n represents 2; or
- (B) A represents a phenylene nucleus and R.sub.1 and R.sub.2 taken together represent 4,5-dicyano-1,3-dithio-2-ylidene, then n represents 2; or
- (C) R.sub.1 is hydrogen, R.sub.2 must be other than hydrogen.
- 2. A dispersion according to claim 1 wherein R.sub.1 and R.sub.2, taken together, represent sufficient atoms to form substituted and unsubstituted radicals selected from the group comprising 5-furanylidene; 9-fluorenylidene; 5-pyrimidinylidene; 5-thiazolidinylidene; 5-pyrrolinyl; 1-indanylidene; 4-isoxazolinylidene; 4-pyrazolinylidene; and 2-dithiolyl-2-yl.
- 3. A dispersion according to claim 2 wherein R.sub.1 and R.sub.2, when taken alone, represent hydrogen, cyano, methylsulfonyl, phenylcarbonyl, phenylcarbamoyl, cyano alkyl, and cyano arylene.
- 4. A dispersion according to claim 2, wherein:
- n is 2;
- A represents phenylene, napthylene, anthracenediyl; or benzothiendiyl;
- R.sub.1 and R.sub.2 both represent cyano or when taken together represent sufficient atoms to form a substituted or unsubstituted furanylidene radical and said substituents are selected from the group consisting of cyano, phenyl, nitrophenyl and oxo.
- 5. A dispersion according to claim 2, wherein said material is selected from the group consisting of:
- 5,5'-(9,10-anthracenediyldimethylidyne)bis[3-cyano-4-phenyl-(5H)-furan-2-one]
- 5,5'-(9,10-anthracenediyldimethylidyne)bis[3,4-di-(p-nitrophenyl)-(5H)-furan-2-one]
- 9,10-bis(dicyanoethenyl)anthracene
- 9-(9-anthracenylmethylidyne)-2,7-dinitrofluorene
- 5-(9-anthracenylmethylidyne)-1,3,5-trihydro-pyrimidine-2,4,6-trione
- 5,5'-(9,10-anthracenediyldimethylidyne)bis(1,3-diethyl-1,3,5-trihydro-pyrimidine-2,4,6-trione)
- 5-(9-anthracenylmethylidyne)-1,3-diethyl-1,3,5-trihydropyrimidine-2,4,6-trione
- 5-(9-anthracenylmethylidyne)-1,3-diethyl-2-thioxo-1,3,5-trihydro-pyrimidine-4,6-dione
- 2,2'-(9,10-anthracenediyldimethylidyne)bis(indan-1,3-dione)
- 5,5'-(9,10-anthracenediyldimethylidyne)bis(N-ethyl-2-thioxo-thiazolidin-4-one)
- 5,5'-(9,10-anthracenediyldimethylidyne)bis(3-carbamoyl-4-phenyl-furan-2-one
- 5-(9-anthracenylmethylidyne)-3-cyano-4-phenyl-furan-5-one
- 4,4'-(9,10-anthracenediyldimethylidyne)bis(3-phenylisoxazolin-5-one)
- 4-(9-anthracenylmethylidyne)-3-phenyl-isoxazolin-5-one
- 5,5'-(9,10-anthracenediyldimethylidyne)bis(2-thioxothiazolidin-4-one)
- 4. 4'-(1,4-phenylenedimethylidyne)bis(3-carbamoyl-1-phenyl pyrazolin-5-one)
- 1,1'-(1,4-phenylenedimethylidyne)bis(3-carboxy-indene)
- 2,6-bis(dicyanoethenyl)naphthalene
- 5,5'-(2,6-naphthalenediyldimethylidyne)bis(3-cyano-4-phenyl-furan-2-one)
- 2,6-bis(.beta.-cyano-.beta.-(p-cyanophenyl)ethenyl]naphthalene
- 5,5'-(dibenzothien-2,8-diyldimethylidyne)bis(3-cyano-4-phenyl-furan-2-one)
- 5,5'-(dibenzothien-2,8-diyldimethylidyne)bis[3,4-di(p-nitrophenyl)-furan-2-one] and
- 5,5'-(dibenzothien-2,8-diyldimethylidyne)bis(3-carbamoyl-4-phenyl-furan-2-one).
Parent Case Info
This is a divisional of U.S. Ser. No. 889,715 filed Mar. 24, 1978 now U.S. Pat. No. 4,165,985 which is in turn a continuation-in-part application of U.S. Ser. No. 804,042 filed June 6, 1977, to VanAllan et al. now abandoned.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
3615558 |
Carreira |
Oct 1971 |
|
4012376 |
Wright |
Mar 1977 |
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Divisions (1)
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Number |
Date |
Country |
Parent |
889715 |
Mar 1978 |
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Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
804042 |
Jun 1977 |
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