MXPA96003742A - Photoconductor and ampolla composition for cathodic derayos tube that has a photoconductor coating form - Google Patents
Photoconductor and ampolla composition for cathodic derayos tube that has a photoconductor coating formInfo
- Publication number
- MXPA96003742A MXPA96003742A MXPA/A/1996/003742A MX9603742A MXPA96003742A MX PA96003742 A MXPA96003742 A MX PA96003742A MX 9603742 A MX9603742 A MX 9603742A MX PA96003742 A MXPA96003742 A MX PA96003742A
- Authority
- MX
- Mexico
- Prior art keywords
- group
- weight
- carbon atoms
- alkyl
- photoconductive
- Prior art date
Links
- 239000000203 mixture Substances 0.000 title claims abstract description 35
- 239000011248 coating agent Substances 0.000 title claims description 6
- 238000000576 coating method Methods 0.000 title claims description 6
- 239000000126 substance Substances 0.000 claims abstract description 27
- 125000004432 carbon atoms Chemical group C* 0.000 claims abstract description 18
- 125000000217 alkyl group Chemical group 0.000 claims abstract description 12
- 125000001624 naphthyl group Chemical group 0.000 claims abstract description 12
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims abstract description 12
- 239000011230 binding agent Substances 0.000 claims abstract description 10
- 239000004094 surface-active agent Substances 0.000 claims abstract description 8
- 125000003545 alkoxy group Chemical group 0.000 claims abstract description 6
- 125000000609 carbazolyl group Chemical group C1(=CC=CC=2C3=CC=CC=C3NC12)* 0.000 claims abstract description 6
- 125000004093 cyano group Chemical group *C#N 0.000 claims abstract description 6
- 125000004663 dialkyl amino group Chemical group 0.000 claims abstract description 6
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 claims abstract description 6
- 125000001424 substituent group Chemical group 0.000 claims abstract description 6
- 125000004435 hydrogen atoms Chemical group [H]* 0.000 claims abstract description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 22
- 238000005245 sintering Methods 0.000 claims description 8
- 239000003708 ampul Substances 0.000 claims description 6
- SSDNULNTQAUNFQ-UHFFFAOYSA-N 3,5-dinitrobenzonitrile Chemical compound [O-][N+](=O)C1=CC(C#N)=CC([N+]([O-])=O)=C1 SSDNULNTQAUNFQ-UHFFFAOYSA-N 0.000 claims description 5
- IFNHAFYSVMXDCX-UHFFFAOYSA-N N-[(4-ethoxyphenyl)methylideneamino]-N-phenylaniline Chemical compound C1=CC(OCC)=CC=C1C=NN(C=1C=CC=CC=1)C1=CC=CC=C1 IFNHAFYSVMXDCX-UHFFFAOYSA-N 0.000 claims description 5
- YUXALIRSFMBNJW-UHFFFAOYSA-N 4-[(dimethylhydrazinylidene)methyl]-N,N-diethylaniline Chemical compound CCN(CC)C1=CC=C(C=NN(C)C)C=C1 YUXALIRSFMBNJW-UHFFFAOYSA-N 0.000 claims description 4
- 125000001664 diethylamino group Chemical group [H]C([H])([H])C([H])([H])N(*)C([H])([H])C([H])([H])[H] 0.000 claims description 4
- YGBCLRRWZQSURU-CLCOLTQESA-N 4-[(Z)-(diphenylhydrazinylidene)methyl]-N,N-diethylaniline Chemical compound C1=CC(N(CC)CC)=CC=C1\C=N/N(C=1C=CC=CC=1)C1=CC=CC=C1 YGBCLRRWZQSURU-CLCOLTQESA-N 0.000 claims description 3
- CEAPHJPESODIQL-UHFFFAOYSA-N N-[(9-ethylcarbazol-3-yl)methylideneamino]-N-phenylaniline Chemical compound C=1C=C2N(CC)C3=CC=CC=C3C2=CC=1C=NN(C=1C=CC=CC=1)C1=CC=CC=C1 CEAPHJPESODIQL-UHFFFAOYSA-N 0.000 claims description 3
- 150000002596 lactones Chemical class 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- TUCVSIRQWDGUHY-UHFFFAOYSA-N N,N-diethyl-4-[[methyl(phenyl)hydrazinylidene]methyl]aniline Chemical compound C1=CC(N(CC)CC)=CC=C1C=NN(C)C1=CC=CC=C1 TUCVSIRQWDGUHY-UHFFFAOYSA-N 0.000 claims description 2
- 239000004793 Polystyrene Substances 0.000 claims description 2
- 125000006159 dianhydride group Chemical group 0.000 claims description 2
- 229910052739 hydrogen Inorganic materials 0.000 claims description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 2
- 239000001257 hydrogen Substances 0.000 claims description 2
- 229920001490 poly(butyl methacrylate) polymer Polymers 0.000 claims description 2
- 239000004417 polycarbonate Substances 0.000 claims description 2
- 229920000515 polycarbonate Polymers 0.000 claims description 2
- 229920002223 polystyrene Polymers 0.000 claims description 2
- 229920000193 polymethacrylate Polymers 0.000 claims 1
- 238000000034 method Methods 0.000 description 11
- 229910052698 phosphorus Inorganic materials 0.000 description 9
- 239000011574 phosphorus Substances 0.000 description 9
- -1 hydrazone compound Chemical class 0.000 description 7
- 229920003227 poly(N-vinyl carbazole) Polymers 0.000 description 6
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 5
- 239000004926 polymethyl methacrylate Substances 0.000 description 5
- 239000002904 solvent Substances 0.000 description 5
- MVPPADPHJFYWMZ-UHFFFAOYSA-N Chlorobenzene Chemical compound ClC1=CC=CC=C1 MVPPADPHJFYWMZ-UHFFFAOYSA-N 0.000 description 4
- JHIVVAPYMSGYDF-UHFFFAOYSA-N Cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 description 4
- CSCPPACGZOOCGX-UHFFFAOYSA-N acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 4
- 239000004020 conductor Substances 0.000 description 4
- 230000001264 neutralization Effects 0.000 description 4
- WUSDCMLIVSVEIR-UHFFFAOYSA-N N-(benzylideneamino)-N-methylaniline Chemical compound C=1C=CC=CC=1N(C)N=CC1=CC=CC=C1 WUSDCMLIVSVEIR-UHFFFAOYSA-N 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- BGTOWKSIORTVQH-UHFFFAOYSA-N Cyclopentanone Chemical compound O=C1CCCC1 BGTOWKSIORTVQH-UHFFFAOYSA-N 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- XAQCJVGGJJFLPP-UHFFFAOYSA-L azane;hydroxy-(hydroxy(dioxo)chromio)oxy-dioxochromium Chemical compound N.N.O[Cr](=O)(=O)O[Cr](O)(=O)=O XAQCJVGGJJFLPP-UHFFFAOYSA-L 0.000 description 2
- HEDRZPFGACZZDS-UHFFFAOYSA-N chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 238000007581 slurry coating method Methods 0.000 description 2
- YXFVVABEGXRONW-UHFFFAOYSA-N toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 2
- AUITUKWCKGNHMQ-UHFFFAOYSA-N 3-chlorobut-3-en-2-one Chemical compound CC(=O)C(Cl)=C AUITUKWCKGNHMQ-UHFFFAOYSA-N 0.000 description 1
- OJAMERVLRXYMPD-UHFFFAOYSA-N 7-(diethylamino)-4-hydroxy-3-oxophenoxazin-10-ium-1-carboxamide;chloride Chemical compound [Cl-].NC(=O)C1=CC(=O)C(O)=C2OC3=CC(N(CC)CC)=CC=C3[NH+]=C21 OJAMERVLRXYMPD-UHFFFAOYSA-N 0.000 description 1
- 241001093575 Alma Species 0.000 description 1
- PJXISJQVUVHSOJ-UHFFFAOYSA-N Indium(III) oxide Chemical compound [O-2].[O-2].[O-2].[In+3].[In+3] PJXISJQVUVHSOJ-UHFFFAOYSA-N 0.000 description 1
- 239000004936 P-84 Substances 0.000 description 1
- 229940088336 Primor Drugs 0.000 description 1
- XOLBLPGZBRYERU-UHFFFAOYSA-N Tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminum Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 230000003247 decreasing Effects 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910003437 indium oxide Inorganic materials 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000004528 spin coating Methods 0.000 description 1
- 230000002522 swelling Effects 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
- 230000002588 toxic Effects 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
Abstract
The present invention relates to photoconductive composition comprising: 5-15% weight of a charge transmitting substance, represented by structural formula (1): wherein R 1 is selected from the group consisting of a phenyl group, substituted by one to three substituents selected from the group consisting of amino, dialkylamino, alkoxy groups with 1 to 6 carbon atoms, alkyl having 1 to 6 carbon atoms and cyano, a 9-alkyl carbazole group, a naphthyl group, and R2 and R3 are same or different independently from each other, each is selected from the group consisting of a hydrogen atom and alkyl having from 1 to 6 carbon atoms, phenyl and naphthyl groups, and n is between 0 and 2; 1-15% by weight of a hydrogenating substance; load absorbing light in the wavelength range of an ultraviolet region, 70-94% by weight of a binder, and 0.05-1% by weight of a surfactant
Description
PHOTOCONDUCTOR COMPOSITION AND AMPOLLA FOR RAYS TUBE
CATÓDICOS THAT HAVE A PHOTOCONDUCTOR CAPE FORMED OF THE SAME
BACKGROUND OF THE INVENTION The present invention relates to a photoconductive composition and an ampoule for cathode ray tubes.
(CRT) having a photoconductive layer formed therefrom, and more particularly, to a photoconductive composition to form a photoconductive layer having excellent coating properties, durability and luminance, and an ampoule for cathode ray tubes having a photoconductive layer formed of it. A photoconductive composition has been used in various fields that apply electrophotographic technique such as photocopiers and laser printers, and especially for the phosphor screen of a color cathode ray tube. Here, the phosphor screen of a cathode ray tube can be manufactured by a paste or slurry coating method or an electrophotographic process. In the paste or slurry coating method, a panel is cleaned and then coated on the panel, pastes, of primary colors (ie, green, blue and red) that emit phosphors. Each phosphorus paste contains polyvinyl alcohol (as its main component), ammonium dichromate and one of the green, blue and red light-emitting phosphors. A predetermined portion of the coated panel is exposed through a REF: 22875 shadow mask and reveals, to give a phosphor screen in a dotted pattern or strips. The above method, however, has certain problems. First, the phosphorus remains in an unexposed portion in a relatively large amount after the developing step, so that the remaining phosphorus is mixed with the phosphorus to be subsequently coated. Second, a reaction between the polyvinyl alcohol and ammonium dichromate contained in the phosphorus paste produces a coloring substance, which deteriorates the purity of color. As another method for making phosphorus for a cathode ray tube, a method using an electrophotographic technique is known. This method is not only simpler than the paste method but also provides a color cathode ray tube that has better luminance. In this method a conductive layer is first formed on the inner surface of a panel using a spin coating method and a photoconductive layer is formed thereon. The photoconductive layer is electrified with a corona charger, and a predetermined portion thereof is then exposed through a shadow mask. The exposed portion of the photoconductive layer is controlled to be in an electrically neutral condition, and green, blue, and red phosphor compositions adhere respectively to the unexposed portion to form a phosphor screen.
A photoconductor includes a charge generating substance (CGM) and a charge transmitting substance (CTM). In this way, the photoconductor behaves like an insulator in the dark, but exhibits electrical characteristics when receiving light (ultraviolet or visible light), releasing an electron or generating an orifice. An inorganic photoconductor performs inefficiently in terms of sensitivity, thermal stability, durability, and hygrosistance-in addition to being toxic. In addition, the inorganic photoconductor generates a large amount of waste during a sintering process, resulting in a photoconductive layer that has poor luminance. Therefore, the inorganic photoconductor is not used substantially. According to this an organic photoconductor has recently been developed. The organic photoconductor is lightweight transparent and easy to burn. However, the organic photoconductor also exhibits a low potential for electrification and poor charge generation capacity and load transmission. In general, a photoconductive composition comprises a charge generating substance, a charge transmitting substance and a binder. Up to now, polyvinylcarbazole is frequently used as the charge generating substance. However, polyvinylcarbazole has the following disadvantages. Its charge potential is low and the luminance of the resulting cathode ray tube is reduced as some residue remains after the sintering process. Also, polyvinylcarbazole absorbs light in the wavelength range of a visible region, so that handling with polyvinylcarbazole should be achieved in a dark room, which obstructs its applicability. In addition, solvents such as chlorobenzene and cyclopentanone used to dissolve polyvinylcarbazole are not preferable, in view of the environment, the health of the workers and the cost of the solvent. Other charge transmitting substances are described in U.S. Pat. No. 5,370,952, but they are difficult to prepare and are dangerous. Brief Description of the Invention An object of the present invention is to provide a photoconductive composition for forming a photoconductive layer having excellent coating properties, durability, and luminance. Another object of the present invention is to provide an ampoule for cathode ray tube having improved luminance by adopting a photoconductive layer formed from a photoconductive composition having an excellent sintering characteristic. To achieve the objective, a photoconductive composition is provided which comprises: 5-15% by weight of a charge transmitting substance represented by the structural formula (1):
(D
wherein R x is selected from the group consisting of a phenyl group, substituted by one to three substituents selected from the group consisting of amino, dialkylamino, alkoxy with 1 to 6 carbon atoms, alkyl with 1 to 6 carbon atoms and cyano groups , - a 9-alkyl carbazole group; a naphthyl group, and R2 and R3, are the same or different independently from each other, each is selected from the group consisting of hydrogen and alkyl having 1 to 6 carbon atoms, phenyl and naphthyl groups, and n is between 0 and 2; 1-15% by weight of a charge generating substance that absorbs light in the wavelength range of an ultraviolet region; 70-94% by weight of a binder; and 0.05-1% weight of a surfactant. The other object of the present invention is achieved by a CRT ampoule comprising a front plate in which a conductive layer, a photoconductive layer and a phosphor screen are formed sequentially, a funnel is connected to the front plate and a electron gun and a deflection yoke, wherein the photoconductive layer is formed of a composition comprising: 5-15% by weight of a charge transmitting substance represented by the structural formula (1);
(D
wherein R x is selected from the group consisting of a phenyl group, substituted by one to three substituents selected from the group consisting of amino, dialkylamino, alkoxy with 1 to 6 carbon atoms, alkyl with 1 to 6 carbon atoms and cyano groups; a 9-alkyl carbazole group; a naphthyl group, and R2 and RJ; they are the same or different independently from each other, each is selected from the group consisting of a hydrogen atom and alkyl groups with 1 to 6 carbon atoms, phenyl and naphthyl, and n is between 0 and 2; 1-15% by weight of a charge generating substance that absorbs light in the wavelength range of an ultraviolet region; 70-94% by weight of a binder; and 0.05-1% weight of a surfactant.
Detailed Description of the Invention A photoconductive composition of the present invention is characterized by a hydrazone compound of the structural formula (1) as a charge transmitting substance. A typical hydrazone compound of structural formula (1) includes 4- (diethylamino]) benzaldehyde N-methyl-N-phenylhydrazone (2), 4-ethoxybenzaldehyde N, N-diphenylhydrazone (3), 4- (diethylamino) benzaldehyde N , N-diphenylhydrazone (4), 4- (diethylamino) benzaldehyde N, N-dimethyl hydrazone (5), 9-ethyl-3-carbazolecarboxaldehyde N, N-diphenylhydrazone (6), and 2-methyl-4- (diethylamino) phenylaldehyde N, N-diphenylhydrazone (7).
(6) (7) The above hydrazone compounds are easily prepared and are considerably soluble in customary organic solvents. Also, the residual potential is low and the photoconductive characteristics hardly change, even when the photoconductive layer formed of these hydrazone compounds are used repetitively. In addition, since its wavelength absorption range corresponds to the ultraviolet region, yellow light (560-580 nm) is available to work. Substances used as a charge generating substance, absorb light in the wavelength range of an ultraviolet region and include 3,5-dinitrobenzonitrile (8), 2,6-dichloroquinone-N-chloroimide (9), 2, 6 dibromoquinone-N-chloroimide (10), orange mordant 1 (11), dianhydride 3, 3, '4, 4' -benzophenone tetracarboxylic acid (12), and crystal violet lactone (13).
(10
As the binder, polymethyl methacrylate, polycarbonate, polybutyl methacrylate or polystyrene are used. Preferably, when a photoconductive layer is coated on the inner surface of a panel, a surfactant is added to the composition in a small amount to reduce the surface tension of the coating. . Primor alma se ßrplea Sil ion silar 100 (dispariole ce? 3teral
ElectraTics, 00.) or plurctrJc-P-84 (available from BASF, CD.) Preserve surfactapte. The solvent used for a photoconductive composition includes chloroform, chloro-methylene acetone, toluene, cyclohexanone and cyclopentanone. Hereinafter as an example for using the photoconductive composition of the present invention, a method for manufacturing a phosphor screen of a color cathode ray tube, by an electrophotographic technique, will be described. First, an interior surface of a panel of a cathode ray tube is cleaned and coated with a conductive composition to form a conductive layer. As conductors for forming the conductive layer, an inorganic conductor such as tin oxide, indium oxide and indium tin oxide or an organic conductor such as quaternary ammonium salts are employed. Considering a property of thermal decomposition during a sintering process, preferably the organic conductor is used. The photoconductive composition, comprising 5-15% by weight of a charge transmitting substance represented by structural formula (1), 1-15% by weight of a charge-generating substance that absorbs light in the wavelength range of a ultraviolet region, 70-94% by weight of a binder and 0.05-1% by weight of a surfactant, is coated on the conductive layer to form a photoconductive layer having a thickness of 2-6 μm. Preferably, to avoid swelling of an aluminum layer after a sintering process, the photoconductive layer should be formed in a thickness not exceeding 6 μm. The photoconductive layer is electrified with a corona charger and a predetermined portion thereof is exposed through a shadow mask. The exposed portion of the photoconductive layer is controlled to be in an electrically neutral condition, and phosphorus compositions that emit green, blue, and red are adhered to the unexposed portion, respectively. The phosphors are semi-solidified using a highly volatile solvent such as acetone and alcohol. The phosphors are completely fused in the resulting cathode ray tube panel when using an infrared heater, in order to form a phosphor screen. In the following, the present invention is described more concretely with respect to its intended examples to illustrate the present invention, without limiting its scope. (Example 1) After an interior surface of a panel is cleaned, a conductive layer is formed there. A photoconductive composition comprising 15 g of 4- (diethylamino) benzaldehyde N-methyl-N-phenylhydrazone, 10 g of 3,5-dinitrobenzonitrile, 100 g of polymethylmethacrylate, 1 g of Silicon silar and 100 and 900 g of cyclohexanone, it is coated in the conductive layer, to form a photoconductive layer having a thickness of approximately 4 μm. The photoconductive layer is electrified with a corona charger, to obtain a surface potential between 200V and 600V. A predetermined portion of the photoconductive layer is exposed through a photo-mask. The exposed portion of the photoconductive layer is controlled to be in an electrically neutral condition, and phosphorus compositions that emit green, blue and red light are adhered to the unexposed portion, respectively. The phosphors are semi-solidified using acetone as a solvent and completely fused in the resulting panel of the cathode ray tube when heating at 70 ° C for 20 seconds with an infrared heater, in order to form a phosphor screen. (Example 2) A phosphor screen is formed according to the same method as described in Example 1, except that a photoconductive composition comprising 15 g of 4- (diethylamino) benzaldehyde N, N-dimethylhydrazone, 10 g of orange mordant 1, 100 g of polymethyl methacrylate, 1 g ofSilicon silar 100, 900 g of cyclohexanone. (Example 3) A phosphor screen is formed according to the same method as described in Example 1, except that a photoconductive composition comprising 10 g of 2-methyl-4- (diethylamino) phenylaldehyde N, N-diphenylhydrazone was employed. , 10 g of 3,5-dinitrobenzonitrile, 100 g of polymethyl methacrylate, 1 g of Silicon silar 100 and 900 g of cyclohexanone. (Comparative Example) After an interior surface of a panel is cleaned, a conductive layer is formed thereon. Subsequently, a photo-conductive composition comprising 200 g of polyvinylcarbazole, 10 g of polymethylmethacrylate, 1 g of celestin blue and 3800 g of chlorobenzene is coated on the conductive layer to thereby form a layer having a thickness of about 4 μm .
The predetermined portion of the photoconductive layer is exposed through a shadow mask. The exposed portion of the photoconductive layer is controlled to be in a layer with an electrically neutral condition, and phosphorus compositions emitting green, blue and red light adhered respectively to the unexposed portion, to form a phosphor screen. The photoconductive compositions of the examples and the comparative example are coated on the inner surface of a panel, respectively and then sintered and the result investigated in each case. In the comparative example a large amount of waste is left after the sintering process, however, in the examples, the amount of waste is decreased. And, the residual potential of the examples was 10V or less, even after electrification and exposure are repeatedly performed. The present invention has the following advantages. First, the photoconductive composition according to the present invention has excellent durability and coating properties and avoids the luminance deterioration of a cathode ray tube by reducing the amount of residue remaining after the sintering process in a process for manufacturing CRT.
Second, a hydrazone compound as a charge transmitting substance is easy and inexpensive to prepare and yellow light is available to work with, resulting in high mass productivity. It is noted that in relation to this date, the best method known by the applicant to carry out the aforementioned invention, is the conventional one for the manufacture of the objects to which it relates. Having described the invention as above, property is claimed as contained in the following:
Claims (5)
- CLAIMS 1. Photo-conductive composition comprising: 5-15% weight of a charge transmitting substance, represented by the structural formula (1), - R2 R? - CH = CH ^ CH = N-N \ R3 (1) wherein R x is selected from the group consisting of a phenyl group, substituted by one to three substituents selected from the group consisting of amino, dialkylamino, alkoxy with 1 to 6 carbon atoms, alkyl with 1 to 6 carbon atoms and cyano groups; a 9-alkyl carbazole group; a naphthyl group, and R2 and R3, are the same or different independently from each other, each is selected from the group consisting of a hydrogen atom and alkyl having 1 to 6 carbon atoms, phenyl and naphthyl groups, and n is between 0 and 2; 1-15% by weight of a charge generating substance that absorbs light in the wavelength range of an ultraviolet region, -70-94% by weight of a binder; and 0.05-1% weight of a surfactant.
- 2. A photoconductive composition as described in claim 1, characterized in that the charge transmitting substance is selected from the group consisting of: 4- (diethylamino) benzaldehyde N-methyl-N-phenylhydrazone, 4-ethoxybenzaldehyde N, N-diphenylhydrazone , 4- (diethylamino) benzaldehyde N, N-diphenylhydrazone, 4- (diethylamino) benzaldehyde N, N-dimethylhydrazone, 9-ethyl-3-carbazolecarboxaldehyde N, N-diphenylhydrazone, and 2-methyl-4 - (diethylamino) phenylaldehyde N , N-diphenylhydrazone.
- 3 . A photoconductive composition as described in claim 1, characterized in that the charge transmitting substance is selected from the group consisting of: 3,5-dinitrobenzonitrile, 2,6-dichloroquinone-N-chloroimide, 2,6-dibromoquinone-N- chloroimide, morrant orange 1, dianhydride 3, 3 *, 4, 4 '-benzophenone tetracarboxylic, and crystal lactone violet. Four . A photoconductive composition as described in claim 1, characterized in that the binder is selected from the group consisting of polymethacrylate, polycarbonate, polybutylmethacrylate and polystyrene. 5 . An ampoule for CRT, comprising a face plate in which a conductive layer, a photoconductive layer and a phosphor screen are formed sequentially, a funnel that is connected to the front plate and provided with an electron gun and a deflection yoke, characterized in that the photoconductive plate is formed of a composition comprising: 5-15% weight a charge transmitting substance, represented by the structural formula (1); R2 RI- CH = CH? ÍCH = N-N: \ R3 (O wherein Ra is selected from the group consisting of a phenyl group, substituted by one to three substituents selected from the group consisting of amino, dialkylamino, alkoxy with 1 to 6 carbon atoms, alkyl with 6 carbon atoms and cyano groups, - a 9-alkyl carbazole group; a naphthyl group, and R2 and R3, are the same or different independently of each other, each is selected from the group consisting of hydrogen atom and alkyl having 1 to 6 carbon atoms, phenyl and naphthyl groups, and n is between 0 and 2; 1-15% by weight of a charge generating substance that absorbs light in the wavelength range of an ultraviolet region; 70-94% by weight of a binder; and 0.05-1% weight of a surfactant. SUMMARY OF THE INVENTION The present invention relates to a photoconductive composition and ampoule of CRT having a photoconductive layer formed therefrom. The photoconductive composition comprises 5-15% by weight of a charge transmitting substance, represented by the structural formula (1) R2, - CH = CH ^ CH = N-N ^ R3 (D wherein R x is selected from the group consisting of a phenyl group, substituted by one to three substituents selected from the group consisting of amino, dialkylamino, alkoxy with 1 to 6 carbon atoms, alkyl with 1 to 6 carbon atoms and cyano groups; a 9-alkyl carbazole group; a naphthyl group, and R2 and R3 are the same or different independently from each other, each is selected from the group consisting of hydrogen and alkyl having 1 to 6 carbon atoms, phenyl and naphthyl groups, and n is between 0 and 2; 1-15% by weight of a charge generating substance that absorbs light in the wavelength range of an ultraviolet region; 70-94% by weight of a binder; and 0.05-1% weight of a surfactant. The photoconductive composition exhibits excellent sintering characteristics and can form a photoconductive layer having excellent coating properties, durability and luminance.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR95-66819 | 1995-12-29 | ||
| KR1019950066819A KR970051783A (en) | 1995-12-29 | 1995-12-29 | Bulb for cathode ray tube employing photoconductive composition and photoconductive film formed using the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| MXPA96003742A true MXPA96003742A (en) | 1997-06-01 |
| MX9603742A MX9603742A (en) | 1997-06-28 |
Family
ID=19447462
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| MX9603742A MX9603742A (en) | 1995-12-29 | 1996-08-29 | Photoconductive composition and ampoule for cathode ray tube having a photoconductive layer formed therefrom. |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US5750296A (en) |
| JP (1) | JPH09194745A (en) |
| KR (1) | KR970051783A (en) |
| DE (1) | DE19633535A1 (en) |
| GB (1) | GB2308669B (en) |
| MX (1) | MX9603742A (en) |
| TW (1) | TW309621B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7291433B2 (en) * | 2004-03-31 | 2007-11-06 | Samsung Electronics Co., Ltd. | Poly(hydrazone)-based charge transport materials |
| US20080099924A1 (en) * | 2005-05-04 | 2008-05-01 | Icemos Technology Corporation | Silicon Wafer Having Through-Wafer Vias With A Predetermined Geometric Shape |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4423129A (en) * | 1980-12-17 | 1983-12-27 | Canon Kabushiki Kaisha | Electrophotographic member having layer containing methylidenyl hydrazone compound |
| JPS57135954A (en) * | 1981-02-17 | 1982-08-21 | Olympus Optical Co Ltd | Electrophotographic receptor and plural copies electrophotographing method using this receptor |
| US4362798A (en) * | 1981-05-18 | 1982-12-07 | International Business Machines Corporation | Hydrazone and pyrazoline or acetosol yellow containing charge transport layer, photoconductor and electrophotographic process using the same |
| DE3201202A1 (en) * | 1982-01-16 | 1983-07-28 | Basf Ag, 6700 Ludwigshafen | NEW PHENYL HYDRAZONE AND THEIR USE |
| JPS58140069A (en) * | 1982-02-12 | 1983-08-19 | Mitsubishi Chem Ind Ltd | 9-ethylcarboazole-3-carbaldehyde hydrazone compound |
| JPS59142556A (en) * | 1983-02-02 | 1984-08-15 | Minolta Camera Co Ltd | Single layer type electrophotographic sensitive body |
| US4465587A (en) * | 1983-02-28 | 1984-08-14 | Air Products And Chemicals, Inc. | Process for the hydroliquefaction of heavy hydrocarbon oils and residua |
| JPS59204839A (en) * | 1983-05-09 | 1984-11-20 | Canon Inc | Electrophotographic sensitive body |
| JPS60119565A (en) * | 1983-12-01 | 1985-06-27 | Mitsubishi Paper Mills Ltd | Electrophotographic sensitive body |
| JPH0727230B2 (en) * | 1986-05-21 | 1995-03-29 | ミノルタ株式会社 | Photoconductor |
| DE3813459A1 (en) * | 1987-04-24 | 1988-11-10 | Minolta Camera Kk | FUNCTIONALLY DIVIDED PHOTO SENSITIVE ELEMENT |
| JPH02222960A (en) * | 1988-11-16 | 1990-09-05 | Mita Ind Co Ltd | Electrophotographic sensitive body |
| JPH0335246A (en) * | 1989-06-30 | 1991-02-15 | Konica Corp | Electrophotographic sensitive body |
-
1995
- 1995-12-29 KR KR1019950066819A patent/KR970051783A/en not_active Application Discontinuation
-
1996
- 1996-07-29 GB GB9615849A patent/GB2308669B/en not_active Expired - Fee Related
- 1996-08-03 TW TW085109375A patent/TW309621B/zh active
- 1996-08-14 US US08/696,786 patent/US5750296A/en not_active Expired - Fee Related
- 1996-08-20 DE DE19633535A patent/DE19633535A1/en not_active Withdrawn
- 1996-08-29 MX MX9603742A patent/MX9603742A/en not_active IP Right Cessation
- 1996-11-12 JP JP8300591A patent/JPH09194745A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH07220635A (en) | Electrophotography screening method of cathode-ray tube using organic photoconductor | |
| MXPA96003742A (en) | Photoconductor and ampolla composition for cathodic derayos tube that has a photoconductor coating form | |
| US5750296A (en) | Photo-conductive composition and CRT bulb having photo-conductive layer formed of the same | |
| US5989766A (en) | Photoconductive composition and display adopting photoconductive layer made thereof | |
| US5726218A (en) | Photo-conductive composition and CRT bulb having photo-conductive layer formed of the same | |
| JPH10177255A (en) | Composition for forming photoconductive layer of color display panel and fluorenone derivative for electron acceptor | |
| JPH10177256A (en) | Composition for forming photoconductive layer of color display panel and 9-dicyanomethylidenethioxanthene 10,10-dioxide derivative for electron acceptor | |
| MXPA96003724A (en) | Photoconductor composition and bulb for cathode ray tube (crt) that has a photoconductor layer formed at the base of the | |
| US6168850B1 (en) | Composition for a photo-conductive layer and a method for preparing a fluorescent layer on a CRT panel | |
| US5853928A (en) | Method for forming braun tube's fluorescent layer | |
| KR100222601B1 (en) | Photo-conductive layer compounds for color display panel | |
| KR100243257B1 (en) | Photoconductive composition and display device employing the photo conductive layer therefrom | |
| CN1153800A (en) | Photo-conductive composition and CRT bulb having photo-conductive layer formed of the same | |
| KR100199556B1 (en) | Optical electric layer construction goods for color display panel | |
| KR100255670B1 (en) | Photoconductive composition and display device employing photoconductive layer formed therefrom | |
| KR100388899B1 (en) | Conductive film composition and bulb for cathode ray tube employing conductive film formed of the same | |
| KR100399651B1 (en) | Composition of photoconductive layer for color display panel | |
| KR100265784B1 (en) | Photoconductive composition and display device employing the photoconductive layer formed therefrom | |
| KR100222600B1 (en) | Electron transfer agent for photo-conductive layer of color display panel | |
| KR100450188B1 (en) | Electron receptor for color display panel light conducting layer, especially including fluorenone derivative | |
| US4122114A (en) | 1-Tricyanoinylpyrene | |
| US3486888A (en) | Photoelectrostatic recording member | |
| JPH10168427A (en) | Composition for forming photoconductive layer of color display panel and thioxanthone 10,10-dioxide derivative for electron acceptor | |
| MXPA98004601A (en) | A composition for a photo conductor layer and a method for preparing a fluorescent layer on a panel of | |
| JPH1116492A (en) | Photoconductive composition for forming cathode ray tube screen aggregate, photoconductor containing composition thereof, and forming of cathode ray tube screen aggregate |