CN1138075A - Aquadag outer conductive coating for colour kinescope and its preparation method - Google Patents
Aquadag outer conductive coating for colour kinescope and its preparation method Download PDFInfo
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- CN1138075A CN1138075A CN 96102645 CN96102645A CN1138075A CN 1138075 A CN1138075 A CN 1138075A CN 96102645 CN96102645 CN 96102645 CN 96102645 A CN96102645 A CN 96102645A CN 1138075 A CN1138075 A CN 1138075A
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- aquadag
- graphite
- picture tube
- outer conductive
- colour picture
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Abstract
The graphite milk as external conducting coating of colour CRT contains graphite (25-30 Wt.%), low-temp filming agent (15-25), disperser (0.6-1.2), surfactant (0.1-0.5), oil and dirt resisting agent (0.1-4), coating aid (1-10) and pure water (30-58), and features low resistivity, good dispersity, high oil, dirt and low temp resistance, high adhesion, stable chemical properties and excellent operation nature.
Description
The invention belongs to colour picture tube outer conductive paint and preparation technology thereof.
Referring to Fig. 1, this is the sectional view of picture tube.1-color picture tube glass bulb wherein; 2-display screen; 3-cone central part; 4-neck; 5-selection electroplax; 6-pin position; 7-electron beam gun; 8,9,10-electronics speed; 11-deflector coil; 12-phosphor body shadow mask; 13-inner conductive film layer; 14-outer conductive film layer.The colour picture tube outer conductive paint that uses exists following defective at present: 1, the coarse size of graphite raw material, irrational distribution, size range roughly accounts for 24 ± 3% at≤2 μ m particles, and 2-4 μ m particle 24 ± 3%, 4-6 μ m account for 28 ± 3%, and 6 μ m account for 24 ± 3%.The coarse particle proportion is big, causes the levelling property of filming poor, and particle is heaped inhomogeneous, and surface irregularity is not bright and clean; 2, coating back resistance height, bubble, this is because only prepare with dry powder graphite aborning, graphite particle is exposed in the air, the a large amount of gases of suction and other impurity, dispersion agent and tensio-active agent are difficult to be attached on the particle, cause goods suspending stabilized poor, defectives such as precipitation is serious, and resistance is higher; 3, bad dispersibility, place easily cohesion of back, precipitation, former dispersion agent adopts homemade carboxymethyl cellulose, and substitution value is at 0.8-1.0, substitution value is low, solvency power is poor, be particulate state and exist, tensio-active agent adopts sodium methylene bis-naphthalene sulfonate, and active function is little, thereby the product coating is coarse, the diffusion flow adjustment, suspending stabilized bad, very easily precipitation is the state that hardens; 4, the temperature tolerance of filming is poor, and low temperature easily comes off, and membrane-forming agent adopts polyvinyl chloride emulsion, and film formation at low temp is poor, and easily embrittlement comes off, and is moisture resistance poor; 5, oil resistant is poor, runs into oil stain, and it is damaged to form " flake " shape.
The objective of the invention is provides a kind of colour picture tube aquadag outer conductive paint and manufacturing process in order to solve the problem of above-mentioned existence.It is low that it has resistance, is uniformly dispersed, apply non-foaming, any surface finish, oil resistant is antifouling, and is low temperature resistant, in firm tack, stable chemical, good operation.
In order to achieve the above object, the invention is characterized in proportioning following (weight percent) graphite 25-30%, film formation at low temp agent 15-25%, dispersion agent 0.6-1.2%, tensio-active agent 0.1-0.5%, grease proofing stain resistant agents 0.1-4%, the auxiliary 1-10% that films, pure water 30-58%.
Dispersion agent is a methylcellulose gum, and Natvosol, cellulose acetate, above-mentioned substance substitution value α be at 1.4-1.6, alkyl biphenyl ether sulfonic acid sodium, fatty alcohol-polyoxyethylene ether, cellulose sulfate ester sodium salt.
Tensio-active agent has adopted sodium butylnaphthalenesulfonate, succinate sodium sulfonate, W-28 (import), LT-146 (import).
Styrene-acrylic resin, poly-third resin, polyvinyl alcohol (PVA) are adopted in the film formation at low temp agent.
Grease proofing stain resistant agents is ethanol, polyvinylpyrrolidone, mandelic resin, polyvinyl chloride emulsion.
The auxiliary of filming is colloid silicon, potassium silicate, water glass, lithium silicate, Calucium Silicate powder.
The manufacturing process of making colour picture tube aquadag outer conductive paint is as follows:
A, carry out the powerful surface treatment of graphite earlier: (1) took by weighing the weight percent of graphite by 20-30%, adds the dispersion agent of 0.1-1.0, is that carrier adds to absolutely then with the pure water, with roller ball grinding machine or vibration mill ball milling 1-3 hour;
(2) the graphite slurries after will handling dewater with pressure filter, promptly as the graphite raw material of producing colour picture tube aquadag outer conductive paint;
B, manufacturing process (following component and proportioning are made by the component and the proportioning of power 1)
(1) pure water is invested in the high-speed stirring groove, adds dispersion agent, stirring and dissolving;
(2) with the graphite raw material of filter-press dehydration, be invested in the steel basin, high-speed stirring it;
(3) tensio-active agent and film formation at low temp agent are thrown in, and added the auxiliary of filming simultaneously;
(4) homogeneous slurry in the steel basin is pumped in the tumbling mill rolling ball milling 3-6 hour;
(5) slush pump in the tumbling mill is depressed in the middling speed steel basin, adds grease proofing stain resistant agents, stir, detect qualified after, filter with 100 eye mesh screens, at last packing.
The graphite particle size scope can be at particle diameter≤2 μ m 45-50%, 2-4 μ m35-45%, and all the other are 4-5 μ m.
Select with regard to component of the present invention below, explanation is gone in proportioning and effect thereof: 1, the present invention has adjusted graphite raw material proportioning and size-grade distribution, thereby has changed the particle structure ratio, and size-grade distribution accounts for 45-50% for≤2 μ m, 2-4 μ m accounts for 35-45%, and all the other are 4-5 μ m.Because particle is thin, rational size distribution, thereby levelling property is good automatically, it is evenly bright and clean to film, immaculate.
2, the present invention adopts good dispersion agent, dissolves well in water, and solution is the vitreosol shape, no particle residue, and dispersion force is extremely strong, and product does not precipitate.
3, adopt optimum surfactant, the powerful surface that reduces is powerful, increases surfactivity, promotes to strengthen all even permeate stream levelling.
4, the present invention adopts ideal oil resistant stain control agent, eliminates " flake " phenomenon that colored picture tube outer wall greasy dirt causes, make film complete bright and clean.Adopting grease proofing stain resistant agents is one of important feature of the present invention.
5, the present invention adopts the film formation at low temp agent, and film forming is good, moisture-proof, low temperature resistant, do not come off.
6, the present invention doses to film to assist and adds agent, and this material granule ultra micro can be filled in uniformly in the space of filming and go, and making the row of filming fine and close, more complete, and is stronger to glass attachment power.Prior art lacks this material, is porous state owing to film, though grid is tiny, water and other matter are easy to be penetrated in the hole goes, and influences film fastness and humidity resistance.Adding with the auxiliary of filming is one of key character of the present invention.
7, the present invention adopts the powerful process of surface treatment of graphite, handles graphite, removes surface contamination, and dispersion agent and tensio-active agent can be adhered on the newborn activated face of graphite particle securely, has improved suspension stability and graphitic conductive greatly.Product resistance of the present invention drops to 0.02-0.05 Ω cm from existing procucts resistance 0.20-0.25 Ω cm, and product is reliable and stable, places and never degenerates in 6 months, does not precipitate.
The present invention has excellent tack, has disapproved any peeling off and has come off, and moisture resistivity is good, is placed on to boil 20 minutes in the boiling water, and without any peeling off the foaming phenomenon, behind the airing, sticking power is not affected, and the rate of peeling off is zero.The water-soluble outside electric conduction graphite latices of domestic like product A0-80, wet fastness can only reach 95% do not peel off.The like product G-80 of powder Co., Ltd. of Hitachi of Japan, tack reaches 80% not to be peeled off, and wet fastness reaches 5/6 not to be peeled off, the like product L-25 of blacklead Co., Ltd. of Japan, tack allows 30% to peel off with interior, and wet fastness % allows 30% to peel off with interior.
Resistance of the present invention is low, and resistivity is controlled at 0.02-0.10 Ω cm scope, and domestic like product A0-80 resistivity is in 0.20-0.25 Ω cm scope, the like product G-80 of FDAC powder Co., Ltd., and resistivity is also in 0.20-0.25 Ω cm scope.
The present invention carries out powerful surface with raw material graphite and gives processing, and domestic like product A0-80, Japanese like product G-80 etc. all makes raw material with Graphite Powder 99, and directly batching, thereby resistance height, precipitation are soon.
The present invention adopts the powerful ball milling dispersing technology of secondary, and the finished product stably dispersing place and do not condense half a year, and domestic like product A0-80 and Japanese like product G-80 all is disposable dispersed with stirring that dispersion efficiency is poor, instability.
Fig. 1 is the sectional view of teletron.
Embodiment 1, (weight percent) graphite 28%, and poly-third resin 18%, Natvosol 1% (substitution value 1.4-1.6), W-28 0.4%, mandelic resin 3%, colloid silicon 5%, pure water 44.6%.
Embodiment 3, (weight percent) graphite 30%, styrene-acrylic resin cellulose acetate 1.2% (substitution value 1.4-1.6), sodium butylnaphthalenesulfonate 0.5%, polyvinyl chloride emulsion 4%, lithium silicate 8%, pure water 41.3%.
Embodiment 4, (weight percent) graphite 26%, poly-third resin 25%, alkyl biphenyl ether sulfonic acid sodium 0.6%, succinate sodium sulfonate 0.1%, ethanol 0.1%, water glass 8%, pure water 40.2%.
Example 5, (weight percent) graphite 25%, poly-third resin 20%, cellulose sulfate fat sodium salt 1.1%, LT-146 0.3% polyvinylpyrrolidone 2%, colloid silicon 6%, pure water 48.6%.
The foregoing description, the graphite particle diameter at≤2 μ m 45-50%, 2-4 μ m35-45%, all the other are for choosing in the 4-5 mu m range.
The foregoing description, take following processing step:
A, carry out the powerful surface treatment of graphite earlier: (1) took by weighing the weight percent of graphite by 20-30%, adds the dispersion agent of 0.1-1.0, is that carrier adds to absolutely then with the pure water, with roller ball grinding machine or vibration mill ball milling 1-3 hour;
(2) the graphite slurries after will handling dewater with pressure filter, promptly as the graphite raw material of producing colour picture tube aquadag outer conductive paint;
B, manufacturing process (following component and proportioning are pressed the component and the proportioning of the foregoing description and made)
(1) pure water is invested in the high-speed stirring groove, adds dispersion agent, stirring and dissolving;
(2) with the graphite raw material of filter-press dehydration, be invested in the steel basin, high-speed stirring it;
(3) tensio-active agent and film formation at low temp agent are thrown in, and added the auxiliary of filming simultaneously;
(4) homogeneous slurry in the steel basin is pumped in the tumbling mill rolling ball milling 3-6 hour;
(5) slush pump in the tumbling mill is depressed in the middling speed steel basin, adds grease proofing stain resistant agents, stir, detect qualified after, filter with 100 eye mesh screens, at last packing.
Claims (8)
1, a kind of colour picture tube aquadag outer conductive paint.It is characterized in that proportioning following (weight percent) graphite 25-30%, film formation at low temp agent 15-25%, dispersion agent 0.6-1.2%, tensio-active agent 0.1-0.5%, grease proofing stain resistant agents 0.1-4%, the auxiliary 1-10% that films, pure water 30-58%.
2, colour picture tube aquadag outer conductive paint according to claim 1, it is characterized in that described dispersion agent is a methylcellulose gum, Natvosol, cellulose acetate, above-mentioned substance substitution value α is at 1.4-1.6, alkyl biphenyl ether sulfonic acid sodium, fatty alcohol-polyoxyethylene ether, cellulose sulfate ester sodium salt.
3, colour picture tube aquadag according to claim 1 place electrically conducting coating is characterized in that tensio-active agent adopts sodium butylnaphthalenesulfonate, succinate sodium sulfonate, W-28 (import), LT-146 (import).
4, colour picture tube aquadag outer conductive paint according to claim 1 is characterized in that film formation at low temp agent employing styrene-acrylic resin, poly-third resin, polyvinyl chloride (PVC) RESINS.
5, colour picture tube aquadag outer conductive paint according to claim 1 is characterized in that grease proofing stain resistant agents is ethanol, polyvinylpyrrolidone, mandelic resin.
6, colour picture tube aquadag according to claim 1 is led coating outward, and the auxiliary that it is characterized in that filming is colloid silicon, potassium silicate, water glass, lithium silicate, Calucium Silicate powder.
7, a kind of manufacturing process of making colour picture tube aquadag outer conductive paint is characterized in that product manufacture is as follows:
The powerful surface treatment of A, graphite: (1) press the weight percent of 20-30% with graphite, adds the dispersion agent of 0.1-1.0, is that carrier adds to absolutely usefulness roller ball grinding machine or vibration mill ball milling 1-3 hour then with the pure water;
(2) the graphite slurries after will handling dewater with pressure filter, promptly as the graphite raw material of producing colour picture tube aquadag outer conductive paint;
B, manufacturing process (following component and proportioning are all made by the component and the weight percent of power 1),
(1) pure water is invested in the high-speed stirring groove, adds dispersion agent, stirring and dissolving;
(2), be invested in the steel basin high-speed stirring with the graphite raw material of filter-press dehydration;
(3) tensio-active agent and film formation at low temp agent are thrown in, and added the auxiliary of filming simultaneously;
(4) homogeneous slurry in the steel basin is pumped in the tumbling mill rolling ball milling 3-6 hour;
(5) slush pump in the tumbling mill is depressed in the middling speed steel basin, adds grease proofing stain resistant agents, stir, detect qualified after, filter with 100 eye mesh screens, at last packing.
8, the manufacturing process of colour picture tube aquadag outer conductive paint according to claim 7 is characterized in that the graphite particle size scope is particle diameter≤2 μ m45-50%, 2-4 μ m 35-45%, and all the other are 4-5 μ m
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96102645A CN1045786C (en) | 1996-02-02 | 1996-02-02 | Aquadag outer conductive coating for colour kinescope and its preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96102645A CN1045786C (en) | 1996-02-02 | 1996-02-02 | Aquadag outer conductive coating for colour kinescope and its preparation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1138075A true CN1138075A (en) | 1996-12-18 |
| CN1045786C CN1045786C (en) | 1999-10-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96102645A Expired - Fee Related CN1045786C (en) | 1996-02-02 | 1996-02-02 | Aquadag outer conductive coating for colour kinescope and its preparation method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6395082B2 (en) * | 2000-05-17 | 2002-05-28 | Hitachi Powdered Metals Co., Ltd. | Coating material for inner surface of cathode-ray tube |
| CN101037555B (en) * | 2007-03-29 | 2010-05-19 | 武汉工程大学 | Inorganic nonmetal magnetic conducting coating and preparation method thereof |
| CN101899233A (en) * | 2010-07-29 | 2010-12-01 | 上海翰博实业有限公司 | Supercapacitor electrode corrosion-resistant conductive coating |
| CN103773199A (en) * | 2014-01-20 | 2014-05-07 | 南通钰成光电科技有限公司 | Conductive coating for kinescope and preparation method of conductive coating |
| CN104974660A (en) * | 2015-06-30 | 2015-10-14 | 苏州洋杰电子有限公司 | Electro-conductive paint for color picture tube and preparation method thereof |
| CN105694638A (en) * | 2014-11-29 | 2016-06-22 | 张文知 | CRT cone outer-wall aqueous conductive coating |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5641655A (en) * | 1979-09-14 | 1981-04-18 | Hitachi Powdered Metals Co Ltd | Preparation of coating for cathode ray tube |
| KR900006174B1 (en) * | 1985-01-31 | 1990-08-24 | 히타찌 훈마쯔 야킨 가부시끼가이샤 | Cathode ray tubes and coating materials therefor |
| CN1031283C (en) * | 1992-09-24 | 1996-03-13 | 烟台西特电子化工材料有限公司 | Formula and making process of electrically-conducting paint for colour picture tube |
-
1996
- 1996-02-02 CN CN96102645A patent/CN1045786C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6395082B2 (en) * | 2000-05-17 | 2002-05-28 | Hitachi Powdered Metals Co., Ltd. | Coating material for inner surface of cathode-ray tube |
| CN101037555B (en) * | 2007-03-29 | 2010-05-19 | 武汉工程大学 | Inorganic nonmetal magnetic conducting coating and preparation method thereof |
| CN101899233A (en) * | 2010-07-29 | 2010-12-01 | 上海翰博实业有限公司 | Supercapacitor electrode corrosion-resistant conductive coating |
| CN101899233B (en) * | 2010-07-29 | 2012-07-04 | 上海翰博实业有限公司 | Supercapacitor electrode corrosion-resistant conductive coating |
| CN103773199A (en) * | 2014-01-20 | 2014-05-07 | 南通钰成光电科技有限公司 | Conductive coating for kinescope and preparation method of conductive coating |
| CN103773199B (en) * | 2014-01-20 | 2016-01-13 | 南通钰成光电科技有限公司 | A kind of picture tube electrically conducting coating and preparation method thereof |
| CN105694638A (en) * | 2014-11-29 | 2016-06-22 | 张文知 | CRT cone outer-wall aqueous conductive coating |
| CN104974660A (en) * | 2015-06-30 | 2015-10-14 | 苏州洋杰电子有限公司 | Electro-conductive paint for color picture tube and preparation method thereof |
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| Publication number | Publication date |
|---|---|
| CN1045786C (en) | 1999-10-20 |
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