CN1153800A - Photo-conductive composition and CRT bulb having photo-conductive layer formed of the same - Google Patents
Photo-conductive composition and CRT bulb having photo-conductive layer formed of the same Download PDFInfo
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- CN1153800A CN1153800A CN 96109353 CN96109353A CN1153800A CN 1153800 A CN1153800 A CN 1153800A CN 96109353 CN96109353 CN 96109353 CN 96109353 A CN96109353 A CN 96109353A CN 1153800 A CN1153800 A CN 1153800A
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Abstract
A photo-conductive composition and CRT bulb having a photo-conductive layer formed of the same are provided. The photo-conductive composition comprises 5-15 wt % of a charge transmitting substance, represented by the structural formula (1) wherein substituents are as defined in the specification; 1-15 wt % of a charge generating substance which absorbs light in the wavelength range of an ultraviolet region; 70-94 wt % of a binder; and 0.05-1 wt % of a surfactant. The photo-conductive composition exhibits excellent sintering characteristic and can form a photoconductive layer having excellent coating properties, durability and luminance.
Description
The present invention relates to photoconductivity composition and cathode ray tube (CRT) glass bulb with the photoconductive layer that forms by said composition, more particularly, the present invention relates to the CRT glass bulb that is used to prepare the photoconductivity composition of having of photoconductive layer splendid coating performance, weather resistance and luminous intensity and has the photoconductive layer that forms by said composition.
The photoconductivity composition has been used in and has adopted electric camera technique for example copying apparatus and laser printer particularly in the fluoroscopic field of color cathode ray tube.Here, the window of tube of cathode tube can be made by slurries coating process (slurry coating method) or electric photographing imaging method.
In the slurries coating process, panel to be cleaned, the slurries that will launch the fluor of primary colors (promptly green, blue and red) then respectively are applied on the described panel.Each phosphor slurry contains one of polyvinyl alcohol (as its main component), ammonium dichromate and transmitting green, blueness and red fluor.The predetermined portion of this panel that applied is exposed and colour developing by shadow mask, obtain the window of tube of point-like or strip pattern.
Yet aforesaid method has some problems.At first, after development step, fluor still is retained in the part that is not exposed with sizable amount, and this fluor of leaving over mixes with the fluor that the back will apply as a result.Secondly, the polyvinyl alcohol and the reaction between the ammonium dichromate that are contained in these fluor slurries can produce the coloring matter that can reduce colour purity.
Making fluoroscopic another method of cathode-ray tube is the known method that makes the electricity consumption camera technique.This method is not only simple than slurry method, and can also provide and have the color cathode ray tube of luminous intensity preferably.In the method, at first on the internal surface of panel, form conductive layer, form photoconductive layer then thereon with whirl coating.This photoconductive layer is electrified with corona charge, by shadow mask its predetermined portion is exposed then.The exposed portions of this photoconductive layer is adjusted to the electric neutrality state, and green, blueness and red fluorescence composition are bonded to the part that it is not exposed respectively, form window of tube.
Photo-conductor comprises material (CGM) that produces electric charge and the material (CTM) of launching electric charge.Therefore, photo-conductor shows as isolator in the dark, and shows electrical characteristic by discharging electronics or producing the hole when receiving light (UV or visible light).
It is poor, toxic in addition that inorganic photoconductor shows aspect photosensitivity, thermostability, weather resistance and wet fastness (hygroresis-tance).In addition, inorganic photoconductor produces a large amount of resistatess in sintering process, causes photoconductive layer luminous intensity poor.Therefore, inorganic photoconductor is not used basically.Therefore organic photoconductor, light weight, transparent and easily luminous have been developed recently.It is low and produce the problem of the ability of electric charge and emission electric charge that yet organic photoconductor has also demonstrated electric potential.
In general, the photo-conductor composition comprises the material that produces electric charge, the material and the tackiness agent of emission electric charge.Up to now, polyvinyl carbazole is usually as the material that produces electric charge.But polyvinyl carbazole has following shortcoming: its charge potential is low, and owing to leave over some resistatess after the sintering processing, has reduced the luminous intensity of formed cathode tube.And polyvinyl carbazole also absorbs the light of visible region wavelength region, so the utilization of polyvinyl carbazole should implement in the darkroom, and this has just hindered its applicability.In addition, the solvent that is used for the polyethylene dissolving carbazole is chlorobenzene and cyclopentanone for example, from the angle of environment, workers'health and solvent expense, also is worthless.
The material of other emission electric charge has disclosure in No. the 5370952nd, United States Patent (USP), but is difficult to preparation and harmful to environment.
The purpose of this invention is to provide the photoconductivity composition that is used to form the splendid coating performance of having of photoconductive layer and weather resistance and luminous intensity.
Another object of the present invention provides by adopting the photoelectric conductor layer of being made by the photoconductivity composition with splendid sintering characteristic to make luminous intensity enhanced bulb for cathode-ray tube.
For realizing this purpose, the photoconductivity composition is provided, comprise:
The material of 5-15% (weight) by the emission electric charge of following structural formula (1) representative:
R in the formula
1Be selected from by 1 to 3 phenyl group that is selected from the substituting group replacement of following groups: amino, dialkyl amido, C
1-C
6Alkoxyl group, C
1-C
6Alkyl and cyano group, 9-alkyl carbazole group, naphthyl group; And R
2And R
3Identical or different, be selected from hydrogen and C independently of each other
1-C
6Alkyl, phenyl and naphthyl group; And n is between 0 and 2;
The material of the generation electric charge of the light that can absorb the ultraviolet region wavelength region of 1-15% (weight);
The tackiness agent of 70-94% (weight); With
The tensio-active agent of 0.05-1% (weight).
Another object of the present invention realizes that by the CRT glass bulb described glass bulb comprises panel, and conductive layer, photoconductive layer and fluorescent screen form successively thereon; Link to each other with this panel and the pipe awl (funnel) of electron beam gun and deflection system is housed; Wherein said photoconductive layer is formed by the composition that comprises following ingredients:
The material of 5-15% (weight) by the emission electric charge of following structural formula (1) representative:
R in the formula
1Be selected from by 1 to 3 phenyl group that is selected from the substituting group replacement of following groups: amino, dialkyl amido, C
1-C
6Alkoxyl group, C
1-C
6Alkyl and cyano group, 9-alkyl carbazole group, naphthyl group; And R
2And R
3Identical or different, be selected from hydrogen atom and C independently of each other
1-C
6Alkyl, phenyl and naphthyl group; And n is between 0 and 2;
The material of the generation electric charge of the light that can absorb the ultraviolet region wavelength region of 1-15% (weight);
The tackiness agent of 70-94% (weight); With
The tensio-active agent of 0.05-1% (weight).
The characteristics of photoconductivity composition of the present invention are the material of structural formula (1) hydrazone compound as the emission electric charge.
Typical structural formula (1) hydrazone compound comprises 4-(diethylamino) phenyl aldehyde N-methyl-N-phenyl hydrazones (2), 4-ethoxy-benzaldehyde N, N-diphenyl hydrazone (3), 4-(diethylamino) phenyl aldehyde N, N-diphenyl hydrazone (4), 4-(diethylamino) phenyl aldehyde N, N-dimethyl hydrazone (5), 9-ethyl-3-carbazole formaldehyde N, N-diphenyl hydrazone (6), with 2-methyl-4-(diethylamino) phenyl aldehyde N, N-diphenyl hydrazone (7).
The easily preparation and in common organic solvent, have sizable solubleness of above-mentioned hydrazone compound.And residual electric potential is low, even and will reuse by the photoconductive layer that these hydrazone compounds form, photoconductive property is also almost constant.In addition, because their absorbing wavelength scope is equivalent to the ultraviolet region, gold-tinted (560-580nm) can obtain when therefore working.
Be used as the light of the material absorbing ultraviolet region wavelength region of the material that produces electric charge, comprise 3,5-dinitrobenzene benzonitrile (8), 2,6-dichloro quinone-N-chlorine imide (9), 2,6-dibromo benzoquinones-N-chlorine imide (10), mordant dyeing orange (mordant orange) 1 (11), 3,3 ', 4,4 '-benzophenone tetracarboxylic dianhydride (12), and crystal violet lactone (13).
As tackiness agent, use polymethylmethacrylate, polycarbonate, poly-n-butyl methacrylate or polystyrene.
When the internal surface coating photoconductivity composition of panel, preferably low quantity of surfactant is added in the said composition to reduce the surface tension of said composition.Main silicon silar 100 or the pluronic P-84 of using is as tensio-active agent.
The solvent that is used for the photoconductivity composition comprises chloroform, methylene dichloride, acetone, toluene, pimelinketone and cyclopentanone.
Will describe the electricity consumption camera technique below and prepare the fluoroscopic method of color cathode ray tube as the example that uses photoconductivity composition of the present invention.
At first, the internal surface of the panel of cathode tube is cleaned, and coating electrically conductive composition thereon, conductive layer formed.As the conductor that is used to form conductive layer, adopt for example stannic oxide of inorganic conductor, Indium sesquioxide and tin indium oxide (indium tin oxide) or organic conductor be quaternary ammonium salt for example.In view of the thermal decomposition characteristic in sintering process, preferentially select organic conductor for use.
The photoconductivity composition is applied on this conductive layer to form thickness be the photoconductive layer of 2-6 μ m, described photoconductivity composition comprises the material by the emission electric charge of structural formula (1) representative of 5-15% (weight), the material of the generation electric charge of the light that can absorb the ultraviolet region wavelength region of 1-15% (weight), the tensio-active agent of the tackiness agent of 70-94% (weight) and 0.05-1% (weight).Preferably, for preventing the expansion of sintering processing back aluminium lamination, the thickness of this photoconductive layer should be no more than 6 μ m.
With corona charge this photoconductive layer is electrified, and its predetermined portion is exposed by shadow mask.The expose portion of this photoconductive layer is adjusted to the electric neutrality state, and transmitting green, blueness and red fluorescent composition are bonded to its unexposed part respectively.Solvent by using high volatility for example acetone and alcohol makes this fluor semicure.By using Infrared heaters to make the fusing fully on the panel of resulting cathode tube of this fluor, form window of tube thus.
More specifically describe the present invention with embodiment below, these embodiment are intended to illustrate the present invention, and unrestricted to scope of the present invention.
Embodiment 1
After the internal surface of panel cleaned, form conductive layer thereon.The photoconductivity composition is applied on this conductive layer to form thickness be the photoconductive layer of about 4 μ m; Described photoconductivity composition comprises 15g 4-(diethylamino) phenyl aldehyde N-methyl-N-phenyl hydrazones, 10g 3,5-dinitrobenzene benzonitrile, 100g polymethylmethacrylate, 1g silicon silar 100 and 900g pimelinketone.With corona charge this photoconductive layer is electrified, obtain the surface potential between 200-600V.
The predetermined portion of this photoconductive layer is exposed by light shield.The expose portion of this photoconductive layer is adjusted to the electric neutrality state, and transmitting green, blueness and red fluorescent composition is bonded to the unexposed portion of this photoconductive layer respectively.Make this fluor semicure with acetone as solvent, and, form window of tube by making fusing fully on its panel 20 seconds in 70 ℃ of heating at resulting cathode tube with Infrared heaters.
Embodiment 2
By preparing window of tube with embodiment 1 described identical method, be that used photoconductivity composition comprises 15g 4-(diethylamino) phenyl aldehyde N, N-dimethyl hydrazone, 10g mordant dyeing orange 1,100g polymethylmethacrylate, 1g silicon silar 100 and 900g pimelinketone.
Embodiment 3
By preparing window of tube with embodiment 1 described identical method, be that used photoconductivity composition comprises 10g 2-methyl-4-(diethylamino) phenyl aldehyde N, N-diphenyl hydrazone, 10g3,5-dinitrobenzene benzonitrile, 100g polymethylmethacrylate, 1g silicon silar 100 and 900g pimelinketone.
Comparative Examples
After the internal surface of panel cleaned, form conductive layer thereon.Then the photoconductivity composition being applied to and forming thickness on this conductive layer is the photoconductive layer of about 4 μ m; Described photoconductivity composition comprises 200g polyvinyl carbazole, 10g polymethylmethacrylate, 1gCelestin Blue and 3800g chlorobenzene.
The predetermined portion of this photoconductive layer is exposed by shadow mask.The expose portion of this photoconductive layer is adjusted to the electric neutrality state, and transmitting green, blueness and red fluorescent composition are bonded to the unexposed portion of this photoconductive layer respectively, form window of tube.
The photoconductivity composition of each embodiment and Comparative Examples is applied on the internal surface of panel the result in each case of sintering, and investigation then respectively.In Comparative Examples, after sintering processing, stay a large amount of resistatess, and under the situation of each embodiment, the amount of resistates reduces.And, even after repeating to electrify and exposing, the residual electric potential of each embodiment is not higher than 10V.
The present invention has following advantages.
At first, have splendid durability and screening characteristics according to photoconduction composition of the present invention Can, and prevent the moon by being reduced in the amount of leaving over residue after the sintering processing of making in the CRT method The luminosity of extreme ray pipe reduces.
Secondly, as the preparation of the hydrazone compound of the material of emission electric charge easily and spend little, And when work gold-tinted can obtain, cause high batch production productivity ratio.
Claims (5)
1. photoconductivity composition comprises:
The material of 5-15% (weight) by the emission electric charge of following structural formula (1) representative:
R in the formula
1Be selected from by 1 to 3 phenyl group that is selected from the substituting group replacement of following groups: amino, dialkyl amido, C
1-C
6Alkoxyl group, C
1-C
6Alkyl and cyano group, 9-alkyl carbazole group, naphthyl group; And R
2And R
3Identical or different, be selected from hydrogen and C independently of each other
1-C
6Alkyl, phenyl and naphthyl group; And n is between 0 and 2;
The material of the generation electric charge of 1-15% (weight) with uv-absorbing wavelength;
The tackiness agent of 70-94% (weight); With
The tensio-active agent of 0.05-1% (weight).
2. according to the photoconductivity composition of claim 1, the material of wherein said emission electric charge is a kind of 4-of being selected from (diethylamino) phenyl aldehyde N-methyl-N-phenyl hydrazones, 4-ethoxy-benzaldehyde N, N-diphenyl hydrazone, 4-(diethylamino) phenyl aldehyde N, N-diphenyl hydrazone, 4-(diethylamino) phenyl aldehyde N, N-dimethyl hydrazone, 9-ethyl-3-carbazole formaldehyde N, N-diphenyl hydrazone and 2-methyl-4-(diethylamino) phenyl aldehyde N, the material of N-diphenyl hydrazone.
3. according to the photoconductivity composition of claim 1, the material of wherein said generation electric charge is a kind ofly to be selected from 3,5-dinitrobenzene benzonitrile, 2,6-dichloro quinone-N-chlorine imide, 2,6-dibromo benzoquinones-N-chlorine imide, mordant dyeing orange 1,3,3 ', 4, the material of 4 '-benzophenone tetracarboxylic dianhydride and crystal violet lactone.
4. according to the photoconductivity composition of claim 1, wherein said tackiness agent is a kind of material that is selected from polymethacrylate, polycarbonate, poly-n-butyl methacrylate and polystyrene.
5. a CRT glass bulb comprises panel, and conductive layer, photoconductive layer and fluorescent screen form successively thereon; Link to each other with described panel and the pipe awl of electron beam gun and deflection system is housed; Wherein said photoconductive layer is formed by the composition that comprises following ingredients:
The material of 5-15% (weight) by the emission electric charge of following structural formula (1) representative:
R in the formula
1Be selected from by 1 to 3 phenyl group that is selected from the substituting group replacement of following groups: amino, dialkyl amido, C
1-C
6Alkoxyl group, C
1-C
6Alkyl and cyano group, 9-alkyl carbazole group, naphthyl group; And R
2And R
3Identical or different, be selected from hydrogen and C independently of each other
1-C
6Alkyl, phenyl and naphthyl group; And n is between 0 and 2;
The material of the generation electric charge of the light that can absorb the ultraviolet region wavelength region of 1-15% (weight);
The tackiness agent of 70-94% (weight); With
The tensio-active agent of 0.05-1% (weight).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96109353 CN1153800A (en) | 1995-12-29 | 1996-08-20 | Photo-conductive composition and CRT bulb having photo-conductive layer formed of the same |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR66819/95 | 1995-12-29 | ||
| CN 96109353 CN1153800A (en) | 1995-12-29 | 1996-08-20 | Photo-conductive composition and CRT bulb having photo-conductive layer formed of the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1153800A true CN1153800A (en) | 1997-07-09 |
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ID=5120344
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96109353 Pending CN1153800A (en) | 1995-12-29 | 1996-08-20 | Photo-conductive composition and CRT bulb having photo-conductive layer formed of the same |
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| Country | Link |
|---|---|
| CN (1) | CN1153800A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105802420A (en) * | 2016-03-09 | 2016-07-27 | 湖南工学院 | Preparation method and application of carbazole based luminous styrene-acrylic emulsion |
-
1996
- 1996-08-20 CN CN 96109353 patent/CN1153800A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105802420A (en) * | 2016-03-09 | 2016-07-27 | 湖南工学院 | Preparation method and application of carbazole based luminous styrene-acrylic emulsion |
| CN105802420B (en) * | 2016-03-09 | 2017-12-26 | 湖南工学院 | One kind is based on the luminous styrene-acrylic emulsion preparation method and applications of carbazole |
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