KR100596815B1 - Graphite-oxide coating material composition for cathode ray tube - Google Patents
Graphite-oxide coating material composition for cathode ray tube Download PDFInfo
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- KR100596815B1 KR100596815B1 KR1020040051029A KR20040051029A KR100596815B1 KR 100596815 B1 KR100596815 B1 KR 100596815B1 KR 1020040051029 A KR1020040051029 A KR 1020040051029A KR 20040051029 A KR20040051029 A KR 20040051029A KR 100596815 B1 KR100596815 B1 KR 100596815B1
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- 239000011248 coating agent Substances 0.000 title claims abstract description 40
- 238000000576 coating method Methods 0.000 title claims abstract description 40
- 239000000203 mixture Substances 0.000 title claims abstract description 35
- 239000000463 material Substances 0.000 title claims abstract description 34
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 68
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 66
- 239000010439 graphite Substances 0.000 claims abstract description 66
- 239000004094 surface-active agent Substances 0.000 claims abstract description 8
- 150000007524 organic acids Chemical class 0.000 claims abstract description 7
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910000077 silane Inorganic materials 0.000 claims abstract description 6
- 239000002245 particle Substances 0.000 claims description 17
- 239000011230 binding agent Substances 0.000 claims description 9
- 239000002270 dispersing agent Substances 0.000 claims description 9
- 238000003860 storage Methods 0.000 abstract description 9
- 239000000654 additive Substances 0.000 abstract description 5
- 238000004886 process control Methods 0.000 abstract description 3
- -1 oxide Substances 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 7
- 239000006185 dispersion Substances 0.000 description 7
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 6
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 6
- 229910021383 artificial graphite Inorganic materials 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 5
- 229910021382 natural graphite Inorganic materials 0.000 description 4
- 238000004381 surface treatment Methods 0.000 description 4
- 239000011231 conductive filler Substances 0.000 description 3
- 239000004020 conductor Substances 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000004408 titanium dioxide Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000008199 coating composition Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
- 239000012756 surface treatment agent Substances 0.000 description 2
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 description 1
- VXZBYIWNGKSFOJ-UHFFFAOYSA-N 2-[4-[5-(2,3-dihydro-1H-inden-2-ylamino)pyrazin-2-yl]pyrazol-1-yl]-1-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethanone Chemical compound C1C(CC2=CC=CC=C12)NC=1N=CC(=NC=1)C=1C=NN(C=1)CC(=O)N1CC2=C(CC1)NN=N2 VXZBYIWNGKSFOJ-UHFFFAOYSA-N 0.000 description 1
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 description 1
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 1
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 description 1
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- 229920001732 Lignosulfonate Polymers 0.000 description 1
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 description 1
- 239000005642 Oleic acid Substances 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- 206010037660 Pyrexia Diseases 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- FHKPLLOSJHHKNU-INIZCTEOSA-N [(3S)-3-[8-(1-ethyl-5-methylpyrazol-4-yl)-9-methylpurin-6-yl]oxypyrrolidin-1-yl]-(oxan-4-yl)methanone Chemical compound C(C)N1N=CC(=C1C)C=1N(C2=NC=NC(=C2N=1)O[C@@H]1CN(CC1)C(=O)C1CCOCC1)C FHKPLLOSJHHKNU-INIZCTEOSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910052910 alkali metal silicate Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000003945 anionic surfactant Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 150000007942 carboxylates Chemical class 0.000 description 1
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 description 1
- 235000021317 phosphate Nutrition 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 150000003871 sulfonates Chemical class 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
- H01J29/06—Screens for shielding; Masks interposed in the electron stream
- H01J29/07—Shadow masks for colour television tubes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
- H01J29/10—Screens on or from which an image or pattern is formed, picked up, converted or stored
- H01J29/18—Luminescent screens
- H01J29/30—Luminescent screens with luminescent material discontinuously arranged, e.g. in dots, in lines
- H01J29/32—Luminescent screens with luminescent material discontinuously arranged, e.g. in dots, in lines with adjacent dots or lines of different luminescent material, e.g. for colour television
- H01J29/327—Black matrix materials
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
- H01J29/48—Electron guns
- H01J29/50—Electron guns two or more guns in a single vacuum space, e.g. for plural-ray tube
- H01J29/503—Three or more guns, the axes of which lay in a common plane
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/86—Vessels; Containers; Vacuum locks
- H01J29/88—Vessels; Containers; Vacuum locks provided with coatings on the walls thereof; Selection of materials for the coatings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2329/00—Electron emission display panels, e.g. field emission display panels
- H01J2329/02—Electrodes other than control electrodes
- H01J2329/04—Cathode electrodes
- H01J2329/0407—Field emission cathodes
- H01J2329/0439—Field emission cathodes characterised by the emitter material
- H01J2329/0444—Carbon types
- H01J2329/0449—Graphite
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2329/00—Electron emission display panels, e.g. field emission display panels
- H01J2329/18—Luminescent screens
- H01J2329/32—Means associated with discontinuous arrangements of the luminescent material
- H01J2329/323—Black matrix
Landscapes
- Paints Or Removers (AREA)
- Carbon And Carbon Compounds (AREA)
Abstract
본 발명은 도전성의 흑연-산화물계 코팅재에 관한 것이다.The present invention relates to a conductive graphite-oxide based coating material.
본 발명은 키슈흑연 단독 또는 키슈흑연과 인상흑연의 혼합물: 1~50중량%, 계면활성제: 3중량% 이하 및 나머지 산화물을 포함하여 이루어진다.The present invention comprises Kish graphite alone or a mixture of Kish graphite and impression graphite: 1 to 50% by weight, surfactant: 3% by weight or less and the remaining oxide.
본 발명은 특별한 첨가제 및 공정제어없이 흑연과 산화물의 표면을 동시에 개질할 수 있어 생산성을 향상시킬 수 있을 뿐만 아니라 저장안정성도 비약적으로 향상시킬 수 있는 유용한 효과가 있다.The present invention can be used to simultaneously modify the surface of the graphite and oxide without special additives and process control to improve the productivity as well as the storage stability can be significantly improved.
음극선관, 흑연, 산화물, 코팅재, 키슈흑연, 실란, 유기산Cathode ray tube, graphite, oxide, coating material, kishu graphite, silane, organic acid
Description
본 발명은 도전성의 흑연-산화물계 코팅재에 관한 것으로, 보다 상세하게는 브라운관 제조시 브라운관 유리용기(funnel) 내부에 도포되는 음극선관용 흑연-산화물계 코팅재 조성물에 관한 것이다.The present invention relates to a conductive graphite-oxide-based coating material, and more particularly to a graphite-oxide-based coating material composition for a cathode ray tube applied to the inside of a glass tube of a brown tube during the production of a brown tube.
브라운관 유리용기(funnel)는 깔때기 모양의 콘(cone) 파트와 전자총이 삽입되는 넥(neck) 파트로 구성되며, 상기 콘 파트에는 양극의 전압공급단자가 부착되어 있으며 내부에는 내부 도전막으로 불리는 도전충진재가 도포된다. 상기 도전충진재는 섀도우마스크와 전자총의 최종전극에 양극전압을 공급할 뿐만 아니라 전자빔을 가속하고 섀도우마스크 등의 전극으로부터 발생되는 2차전자를 모아 색순도를 향상시키는 역할을 하게 된다. 이러한 도전충진재는 패널 베이킹 후공정에서 브라운관 용기내부에 도포되는데, 도포시 유동코팅, 공기중 건조 및 열처리의 단계를 거치게 된다.The CRT glass container consists of a funnel-shaped cone part and a neck part into which an electron gun is inserted. The cone part has a voltage supply terminal of a positive electrode and an internal conductive film called an internal conductive film. Filler is applied. The conductive filler not only supplies the anode voltage to the final electrodes of the shadow mask and the electron gun, but also accelerates the electron beam and collects secondary electrons generated from the electrodes such as the shadow mask to improve color purity. The conductive filler is applied to the inside of the CRT container in the post-baking process of the panel, and is subjected to the steps of flow coating, drying in air and heat treatment during application.
일반적으로 브라운관의 내부코팅재(도전충진재)로는 흑연이 주로 이용된다. 상기 흑연은 그 자체의 고유한 특성으로 인하여 각종 전극, 브러시, 저항발열체 및 내화물 등에 주로 이용된다. 흑연은 크게 천연흑연, 인조흑연 및 키슈흑연 등으로 나눌 수 있으며, 천연흑연은 다시 인상흑연과 토상흑연으로 구분된다. 현재 브라운관용 도전성 코팅재의 도전체로는 주로 고순도의 인상흑연이 이용되고 있으며, 저항체로는 산화철 및 이산화티탄과 같은 산화물이 이용되고 있다. 또한, 바인더로는 액상규산소다 또는 액상규산가리 등이 이용되고 있다.In general, graphite is mainly used as an inner coating material (conductive filler) of the CRT. The graphite is mainly used for various electrodes, brushes, resistance heating elements and refractory materials due to its inherent properties. Graphite can be largely divided into natural graphite, artificial graphite, and Kishu graphite, and natural graphite is divided into impression graphite and soil graphite. Currently, high purity impression graphite is mainly used as a conductor of a conductive coating material for CRT, and oxides such as iron oxide and titanium dioxide are used as a resistor. As the binder, liquid sodium silicate or liquid silicate is used.
브라운관용 도전성 코팅재에 관한 종래기술로는 일본 공개특허공보 2001-325900호 및 평8-269363호를 들 수 있다. 상기 종래기술들중 일본 공개특허공보 2001-325900호에서는 규산알카리, 분산제, 물, 인상 및 인조흑연, 전기저항체(산화철, 이산화티탄)로 구성된 조성물이 제시되어 있다. 그러나, 상기 종래기술은 분산안정성이 떨어져 장기간 보관시 흑연과 산화물의 비중차이로 침강에 의한 분리가 발생되는 문제점이 있다.As the prior art regarding the conductive coating material for CRT, Japanese Laid-Open Patent Publication Nos. 2001-325900 and 8-269363 are mentioned. Japanese Laid-Open Patent Publication No. 2001-325900 discloses a composition composed of alkali silicate, dispersant, water, impression and artificial graphite, and an electrical resistor (iron oxide, titanium dioxide). However, the prior art has a problem that separation is caused by sedimentation due to the difference in specific gravity of graphite and oxide when long-term storage is poor dispersion stability.
또한, 상기 종래기술들중 일본 공개특허공보 평8-269363호는 도전성 코팅재의 분산안정성을 향상시키기 위하여 흑연, 산화물 분말에 음전하를 가진 표면처리제를 처리하는 방법을 제시하고 있다. 그러나, 상기 종래기술은 첨가되는 많은 양의 산화물에 분산안정성을 부여하기 위하여 표면처리제를 첨가하여 표면을 개질하여야 할 뿐만 아니라 저항값을 높이기 위하여 물로 희석할 경우 요구되는 물성치를 얻기 어려운 문제점이 있다.In addition, Japanese Patent Application Laid-open No. Hei 8-269363 has disclosed a method of treating a surface treatment agent having a negative charge on graphite and oxide powder in order to improve dispersion stability of the conductive coating material. However, the prior art has a problem in that it is difficult to obtain the physical properties required when diluting with water to increase the resistance value as well as modifying the surface by adding a surface treatment agent to give dispersion stability to a large amount of oxide to be added.
본 발명은 상기한 종래기술의 문제점을 해결하기 위한 것으로, 기존에 사용되던 인조흑연 및 인상흑연을 대신하여 윤활성 및 표면처리 특성이 우수한 키슈흑연을 사용함으로써, 특별한 첨가제 및 공정제어없이 흑연과 산화물의 표면을 동시에 개질할 수 있어 생산성을 향상시킬 수 있을 뿐만 아니라 저장안정성도 비약적으로 향상시킬 수 있는 음극선관용 흑연-산화물계 코팅재 조성물을 제공하는데, 그 목적이 있다.
The present invention is to solve the above problems of the prior art, by using the Kish graphite excellent in lubricity and surface treatment properties in place of the artificial graphite and the impression graphite used in the prior art, the graphite and oxide without special additives and process control It is an object of the present invention to provide a graphite-oxide-based coating material composition for a cathode ray tube that can simultaneously modify the surface to improve productivity as well as to dramatically improve storage stability.
상기 목적을 달성하기 위한 본 발명은 키슈흑연 단독 또는 키슈흑연과 인상흑연의 혼합물: 1~50중량%, 계면활성제: 3중량% 이하 및 나머지 산화물을 포함하여 이루어진다.The present invention for achieving the above object is made of Kish graphite alone or a mixture of Kish graphite and impression graphite: 1 to 50% by weight, surfactant: 3% by weight or less and the remaining oxide.
이하, 본 발명을 상세하게 설명한다.EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated in detail.
본 발명은 종래에 사용되던 인조흑연 및 인상흑연을 대체하여 윤활성 및 표면처리 특성이 우수한 키슈흑연을 사용하는데 특징이 있다.The present invention is characterized by using the Kish graphite excellent in lubricity and surface treatment properties in place of the artificial graphite and the impression graphite used in the prior art.
키슈흑연은 제철소의 제강공정에서 발생되는 부산물이다.Kishu graphite is a by-product from the steelmaking process of steel mills.
제강공정시 철 속에 용해되는 탄소원자의 양은 온도에 따라 변하게 되고, 고온에서 용융철에 용해되어 있던 탄소중 일부는 철의 결정구조에 들어가서 합금을 형성하지만 일부의 탄소는 출선후 타공정으로 이송되는 도중 약간의 온도 또는 압 력저하에 의해 철로부터 분리되어 얇은 조각상태의 흑연결정으로 석출하게 되며, 이와 같이 고온에서 용융철로부터 석출된 흑연을 키슈흑연이라고 한다. During the steelmaking process, the amount of carbon atoms dissolved in iron changes with temperature, and some of the carbon dissolved in molten iron at high temperature enters the crystal structure of iron to form alloys, but some of the carbon is transferred to other processes after leaving the ship. It is separated from iron by a slight temperature or pressure drop to precipitate as a thin piece of graphite crystal, and graphite precipitated from molten iron at a high temperature is called Kish graphite.
상기 키슈흑연은 천연흑연중 인상흑연과 외관, 성상 및 결정구조 등이 거의 유사하나, 윤활성, 내약품성 및 표면처리 특성이 천연흑연에 비하여 월등하게 우수하다.Kishu graphite is almost similar to the impression graphite in natural graphite, the appearance, appearance and crystal structure, but the lubricity, chemical resistance and surface treatment properties are superior to natural graphite.
이하, 본 발명의 코팅재 조성물의 성분제한 이유부터 살펴본다.Hereinafter, look at from the reasons for limiting the components of the coating material composition of the present invention.
본 발명의 코팅재 조성물은 키슈흑연 단독 또는 키슈흑연과 인상흑연의 혼합물, 계면활성제 및 나머지 산화물을 포함하여 이루어진다.The coating composition of the present invention comprises Kish graphite alone or a mixture of Kish graphite and impression graphite, surfactant and the remaining oxide.
키슈흑연 단독 또는 키슈흑연과 인상흑연의 혼합물: 1~50중량%Kishu graphite alone or a mixture of Kishu graphite and impression graphite: 1 to 50% by weight
상기 흑연은 도전성 코팅재에서 도전체로써 작용하며, 본 발명에서 사용가능한 흑연은 키슈흑연 단독 또는 키슈흑연과 인상흑연의 혼합물이 있다. 상기 키슈흑연은 윤활성이 좋고 층간구조가 발달되어 있어 산화물과의 표면처리시 인상흑연에 비하여 우수하다. 따라서, 산화물의 양이 증가하면 키슈흑연을 단독으로 사용하거나 키슈흑연/인상흑연의 중량비를 증가시켜 사용하는 것이 보다 바람직하다.The graphite acts as a conductor in the conductive coating, and the graphite usable in the present invention is either Kish graphite alone or a mixture of Kish graphite and impression graphite. The Kish graphite has good lubricity and has an excellent interlaminar structure, which is superior to that of impression graphite when the surface is treated with an oxide. Therefore, when the amount of oxide is increased, it is more preferable to use Kish graphite alone or to increase the weight ratio of Kish graphite / phosphorus graphite.
상기 키슈흑연 단독 또는 키슈흑연과 인상흑연의 혼합물의 첨가량이 1중량% 미만이면 첨가에 따른 상기 도전체로써의 역할을 할 수 없고, 50중량%를 초과하면 분산안정성과 부착강도가 저하되므로, 그 첨가량을 1~50중량%로 제한하는 것이 바람직하다.When the addition amount of the Kish graphite alone or the mixture of Kish graphite and impression graphite is less than 1% by weight can not serve as the conductor according to the addition, if it exceeds 50% by weight, dispersion stability and adhesion strength is lowered, It is preferable to limit the amount to 1 to 50% by weight.
계면활성제: 3중량% 이하Surfactant: 3 wt% or less
상기 계면활성제는 입자들의 균일한 분산과 혼합에 유효한 성분으로, 대표적인 예로는 알칼리 술폰산염, 황산염, 리그노술폰산염, 카르복실염 및 인산염 등을 포함하는 음이온성 계면활성제가 있다. 상기 계면활성제의 첨가량이 3중량%를 초과하면 부착강도가 저하되므로, 그 함량을 3중량% 이하로 제한하는 것이 바람직하다.The surfactant is an effective ingredient for uniform dispersion and mixing of particles, and representative examples thereof include anionic surfactants including alkali sulfonates, sulfates, lignosulfonates, carboxylates, and phosphates. When the amount of the surfactant added exceeds 3% by weight, the adhesion strength is lowered, so the content is preferably limited to 3% by weight or less.
본 발명의 코팅분말에 있어서, 상기한 성분이외에 나머지는 산화물로 이루어진다. 상기 산화물은 도전성 코팅재에 있어서 저항체로써 작용하며, 그 종류가 특별하게 제한되는 것은 아니다. 이용될 수 있는 산화물의 대표적인 예로는 산화철, 이산화티탄 등을 들 수 있다.In the coating powder of the present invention, in addition to the above components, the remainder is composed of oxides. The oxide acts as a resistor in the conductive coating material, the kind is not particularly limited. Representative examples of the oxide that can be used include iron oxide, titanium dioxide and the like.
또한, 본 발명에서 상기 키슈흑연 입자의 평균입도 또는 상기 키슈흑연과 인상흑연의 혼합물 입자의 평균입도에 대한 상기 산화물 입자의 평균입도의 비를 제어하면 보다 우수한 표면특성을 얻을 수 있다. 즉, 본 발명에서는 상기 입도비를 1/5~1/20으로 제한하면 보다 우수한 표면특성을 얻을 수 있어 보다 바람직하다.Further, in the present invention, better surface properties can be obtained by controlling the ratio of the average particle size of the Kish graphite particles or the average particle size of the oxide particles to the average particle size of the mixture particles of Kish graphite and impression graphite. That is, in the present invention, when the particle size ratio is limited to 1/5 to 1/20, more excellent surface characteristics can be obtained, which is more preferable.
상기한 본 발명의 코팅재 조성물에는 바인더 및 분산제가 추가로 첨가될 수 있다.A binder and a dispersant may be further added to the coating material composition of the present invention.
바인더: 코팅재 조성물 100중량부에 대하여 67~333중량부Binder: 67 to 333 parts by weight based on 100 parts by weight of the coating material composition
상기 바인더는 코팅재를 브라운관에 부착시키는데 유효한 성분이다. 상기 바 인더의 첨가량이 코팅재 조성물 100중량부에 대하여 67중량부 미만이면 부착력이 발휘되기 어려울 수 있고, 333중량부를 초과하면 표면저항의 조절이 어렵고 가스환원특성도 저하되므로, 그 첨가량을 코팅재 조성물 100중량부에 대하여 67~333중량부로 제한하는 것이 바람직하다.The binder is an effective ingredient for attaching the coating material to the CRT. When the amount of the binder added is less than 67 parts by weight with respect to 100 parts by weight of the coating material composition, the adhesion may be difficult to be exhibited. When the amount of the binder exceeds 333 parts by weight, it is difficult to control the surface resistance and the gas reduction properties are also reduced. It is preferable to limit it to 67-333 weight part with respect to a weight part.
분산제: 코팅재 조성물 100중량부에 대하여 0.01~15.0중량부Dispersant: 0.01 to 15.0 parts by weight based on 100 parts by weight of the coating material composition
상기 분산제는 입자들의 분산을 용이하게 하는데 유효한 성분으로, 대표적인 예로는 카르복실메틸셀룰로스, 폴리아크릴산 소다, 아라비안 검 등이 있다. 상기 분산제의 첨가량이 코팅재 조성물 100중량부에 대하여 0.01중량부 미만이면 저장안정성이 저하될 수 있고, 15.0중량부를 초과하면 도포성 및 작업성이 저하될 수 있으므로, 그 첨가량을 코팅재 조성물 100중량부에 대하여 0.01~15.0중량부로 제한하는 것이 바람직하다.The dispersant is an effective component for facilitating the dispersion of the particles, and representative examples thereof include carboxymethyl cellulose, polyacrylic acid soda, and arabian gum. If the amount of the dispersant is less than 0.01 part by weight based on 100 parts by weight of the coating material composition, the storage stability may be lowered. If the amount of the dispersant is greater than 15.0 parts by weight, the coating property and workability may be lowered. It is preferable to limit to 0.01 to 15.0 parts by weight.
또한, 본 발명에서는 상기한 성분이외에 코팅재 조성물 100중량부에 대하여 0.01~5.0중량부의 실란을 첨가하는 것이 가능하며, 이 경우 부착강도를 증가시킬 수 있고 바인더의 첨가량을 감소시킬 수 있어 보다 바람직하다. 상기 실란의 첨가량이 코팅재 조성물 100중량부에 대하여 0.01중량부 미만이면 첨가에 따른 상기 효과를 얻을 수 없고, 5.0중량부를 초과하면 표면저항 조절이 어렵고 분산안정성이 저하되므로, 그 첨가량을 코팅재 조성물 100중량부에 대하여 0.01~5.0중량부로 제한하는 것이 바람직하다.In addition, in the present invention, it is possible to add 0.01 to 5.0 parts by weight of silane with respect to 100 parts by weight of the coating material composition in addition to the above components, in which case the adhesion strength can be increased and the amount of the binder added can be more preferable. If the amount of the silane is less than 0.01 parts by weight based on 100 parts by weight of the coating material composition, the above effect according to the addition cannot be obtained. If the amount is more than 5.0 parts by weight, it is difficult to control the surface resistance and the dispersion stability is lowered. It is preferable to limit it to 0.01-5.0 weight part with respect to a part.
또한, 본 발명에서는 상기한 성분이외에 코팅분말 100중량부에 대하여 10.0중량부의 유기산을 첨가하는 것이 가능하며, 이 경우 저장안정성을 보다 향상시킬 수 있어 보다 바람직하다. 상기 유기산은 그 종류에 특별하게 제한되는 것은 아니며, 그 대표적인 예로는 올레인산, 말레인산 등을 들 수 있다. 상기 유기산의 첨가량이 코팅재 조성물 100중량부에 대하여 10.0중량부를 초과하면 부착강도를 저하시키는 문제점이 발생될 수 있으므로, 그 첨가량을 코팅재 조성물 100중량부에 대하여 10.0중량부로 제한하는 것이 바람직하다.In addition, in the present invention, it is possible to add 10.0 parts by weight of an organic acid to 100 parts by weight of the coating powder in addition to the above-mentioned components, and in this case, storage stability can be further improved, which is more preferable. The organic acid is not particularly limited to the kind thereof, and representative examples thereof include oleic acid and maleic acid. When the addition amount of the organic acid exceeds 10.0 parts by weight with respect to 100 parts by weight of the coating material composition may cause a problem of lowering the adhesion strength, it is preferable to limit the addition amount to 10.0 parts by weight based on 100 parts by weight of the coating material composition.
이하, 실시예를 통하여 본 발명을 보다 상세하게 설명하며, 이는 본 발명의 바람직한 일실시예일뿐 이에 의하여 본 발명이 제한되는 것은 아니다.Hereinafter, the present invention will be described in more detail with reference to the following examples, which are only preferred embodiments of the present invention, and thus the present invention is not limited thereto.
[실시예1]Example 1
하기 표 1과 같이 코팅재 조성물을 배합하여 교반기에서 60분간 강력교반한 후, 물을 코팅재 조성물 100중량부에 대하여 128~143중량부를 투입하여 분산시켰다. 그리고, 3시간 후 바인더, 분산제 등의 첨가제를 투입한 다음 콜로이드 밀을 이용하여 재분산시켜 도전성 코팅재를 제조하였다. 이와 같이 제조된 도전성 코팅재를 유리위에 플로우(flow) 코팅한 다음, 열처리하여 그에 따른 특성을 평가하였으며, 그 결과는 하기 표 2와 같다.After mixing the coating composition as shown in Table 1 and stirring vigorously for 60 minutes in a stirrer, water was dispersed by adding 128 ~ 143 parts by weight to 100 parts by weight of the coating material composition. After 3 hours, additives such as a binder and a dispersant were added, and then redispersed using a colloid mill to prepare a conductive coating material. The conductive coating thus prepared was flow coated on glass, and then heat treated to evaluate the properties thereof, and the results are shown in Table 2 below.
상기 표 2에서 알 수 있는 바와 같이, 본 발명의 범위를 만족하는 발명예(1~5)는 비교예에 비하여 우수한 특성을 갖는 것을 알 수 있다.As can be seen from the above Table 2, Inventive Examples (1 to 5) satisfying the scope of the present invention can be seen to have excellent characteristics compared to the comparative example.
또한, 실란 및 유기산이 적절하게 추가로 첨가된 발명예(2~5)의 경우 첨가되지 않은 발명예(1)에 비하여 저장안정성 및 부착강도가 보다 우수함을 알 수 있다.In addition, it can be seen that in the case of Inventive Examples (2 to 5) to which silane and organic acid are appropriately additionally added, storage stability and adhesion strength are superior to Inventive Example (1) not added.
[실시예2]Example 2
상기 실시예1의 발명예2를 이용하여 흑연과 산화물의 입도에 따른 특성을 평가하였으며, 그 결과는 하기 표 3과 같다.The characteristics according to the particle size of the graphite and the oxide was evaluated using the invention example 2 of Example 1, the results are shown in Table 3.
상기 표 3에서 알 수 있는 바와 같이, 흑연과 산화물의 입도비가 1/5~1/20을 만족하는 경우 이를 만족하지 않는 경우에 비하여 표면특성이 보다 우수하였다.As can be seen in Table 3, when the particle size ratio of graphite and oxide satisfies 1/5 to 1/20, the surface characteristics were better than those of the case where the graphite and oxide were not satisfied.
상술한 바와 같이, 본 발명에 따르면 기존에 사용되던 인조흑연 및 인상흑연을 대신하여 윤활성 및 표면처리 특성이 우수한 키슈흑연을 사용함으로써, 특별한 첨가제 및 공정제어없이 흑연과 산화물의 표면을 동시에 개질할 수 있어 생산성을 향상시킬 수 있을 뿐만 아니라 저장안정성도 비약적으로 향상시킬 수 있는 유용한 효과가 있다.As described above, according to the present invention, by using Kish graphite having excellent lubricity and surface treatment properties in place of artificial graphite and impression graphite, which are used previously, the surfaces of graphite and oxide can be simultaneously modified without special additives and process control. This not only improves productivity, but also has a useful effect of dramatically improving storage stability.
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