JP3357107B2 - White conductive titanium dioxide powder and method for producing the same - Google Patents
White conductive titanium dioxide powder and method for producing the sameInfo
- Publication number
- JP3357107B2 JP3357107B2 JP00335593A JP335593A JP3357107B2 JP 3357107 B2 JP3357107 B2 JP 3357107B2 JP 00335593 A JP00335593 A JP 00335593A JP 335593 A JP335593 A JP 335593A JP 3357107 B2 JP3357107 B2 JP 3357107B2
- Authority
- JP
- Japan
- Prior art keywords
- titanium dioxide
- white conductive
- producing
- dioxide powder
- inert gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/36—Compounds of titanium
- C09C1/3607—Titanium dioxide
- C09C1/3653—Treatment with inorganic compounds
- C09C1/3661—Coating
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Non-Insulated Conductors (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Pigments, Carbon Blacks, Or Wood Stains (AREA)
- Conductive Materials (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は帯電防止用の塗料、プラ
スチック、繊維等に用いられる白色導電性二酸化チタン
粉末に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a white conductive titanium dioxide powder used for antistatic paints, plastics, fibers and the like.
【０００２】[0002]
【従来の技術】現在、導電材料として多量に使用されて
いるカーボンブラックや金属粉は、電気抵抗が非常に低
く、特性的には優れているものの、それらの色調が黒色
のため用途が限定されていた。その対策として、二酸化
チタンの表面を、酸化スズで被覆したもの（特開昭５３
−９２８５４公報）やその導電性改良品としてアンチモ
ンをドープした酸化スズを被覆した白色の導電性酸化チ
タンの製造法が開示された（特開昭５８−２０９００２
公報など）。2. Description of the Related Art At present, carbon black and metal powder, which are used in large amounts as conductive materials, have very low electric resistance and excellent characteristics, but their color tone is black, so their use is limited. I was As a countermeasure, a titanium dioxide surface coated with tin oxide (Japanese Patent Laid-Open No.
Japanese Unexamined Patent Publication (Kokai) No. 58-209002) and a method for producing white conductive titanium oxide coated with antimony-doped tin oxide as an improved conductivity thereof.
Gazettes).
【０００３】この白色導電性酸化チタンを用いた、帯電
防止用の塗料、プラスチック、繊維は、白色という利点
を生かし、清潔感を必要とする白衣やクリーンルームの
内装あるいは明彩色の塗料やプラスチック製品に近年需
要を増してきている。[0003] Antistatic paints, plastics and fibers using this white conductive titanium oxide take advantage of the white color and can be used in white coats and clean room interiors or in brightly colored paints and plastic products that require a clean feeling. In recent years, demand has been increasing.
【０００４】しかしながら、最近アンチモンの毒性上の
問題が取沙汰されるようになり、アンチモンを含有しな
い白色導電性酸化チタン粉末の開発が必要となった。ア
ンチモンを使用しない製法として、例えば特開平４−１
５４６２１公報が開示されたが、この方法ではアンチモ
ンを含有しないものの電気抵抗がアンチモンを含有した
ものと同等のものは得られていない。[0004] However, recently, the problem of antimony toxicity has been raised, and it has become necessary to develop a white conductive titanium oxide powder containing no antimony. As a production method using no antimony, for example, Japanese Patent Laid-Open No. 4-1
No. 54621 was disclosed, but this method did not contain antimony, but did not obtain an electrical resistance equivalent to that containing antimony.
【０００５】[0005]
【発明が解決しようとする課題】本発明は毒性のあるア
ンチモンを使用しないにもかかわらず、白度が高く、か
つ優れた導電性を有する、白色導電性二酸化チタン粉末
を提供しようとするものである。DISCLOSURE OF THE INVENTION The present invention aims to provide a white conductive titanium dioxide powder having high whiteness and excellent conductivity even though toxic antimony is not used. is there.
【０００６】[0006]
【課題を解決するための手段】本発明者らは白度を保ち
ながら、かつ毒性上の問題のあるアンチモンを使用しな
いにもかかわらず、アンチモン含有品と同等の導電性を
有する酸化チタン粉末を開発する為鋭意研究を重ねた結
果、本発明を完成したものである。すなわち、本発明
は、二酸化チタン粒子表面に、リンを０.１〜１０重量
％含む酸化スズの被覆層を有することを特徴とする白色
導電性二酸化チタン粉末を提供するものである。DISCLOSURE OF THE INVENTION The present inventors have developed a titanium oxide powder having the same conductivity as an antimony-containing product while maintaining whiteness and not using antimony which has a toxicity problem. As a result of intensive research for development, the present invention has been completed. That is, the present invention provides a white conductive titanium dioxide powder having a tin oxide coating layer containing 0.1 to 10% by weight of phosphorus on the surface of titanium dioxide particles.
【０００７】本発明にかかる白色導電性二酸化チタン粉
末は、二酸化チタン粒子表面へスズの加水反応生成物を
均一に沈着させ、その後リンを酸化スズに対し０.１〜
１０重量％被覆させることによる製造することができ
る。さらに非酸化性雰囲気にて５００〜８００℃で加熱
処理することが好ましく、該加熱処理は不活性ガスを吹
き込みながら行う事がより好ましい。[0007] The white conductive titanium dioxide powder according to the present invention uniformly deposits a reaction product of tin on the surface of titanium dioxide particles, and then transfers phosphorus to tin oxide in an amount of 0.1 to 0.1%.
It can be produced by coating 10% by weight. Further, heat treatment is preferably performed at 500 to 800 ° C. in a non-oxidizing atmosphere, and more preferably, the heat treatment is performed while blowing an inert gas.
【０００８】本発明の基体となる二酸化チタンとして
は、球状、針状などの様な形状のものも使用することが
できる。また、結晶形としては、アナターゼ型、ルチル
型及び非晶質のものも使用することができる。また、二
酸化チタンのアルカリ金属化合物、例えば、チタン酸カ
リウムやチタン酸ナトリウムなども使用することができ
る。[0008] As the titanium dioxide serving as the substrate of the present invention, those having a shape such as a sphere or a needle can be used. As the crystalline form, anatase type, rutile type and amorphous type can also be used. Further, an alkali metal compound of titanium dioxide, for example, potassium titanate or sodium titanate can also be used.
【０００９】酸化スズの水和物の被膜を形成させる方法
としては、種々の方法がある。例えば、二酸化チタンの
水懸濁液に、スズ塩またはスズ酸塩の溶液を添加した
後、アルカリまたは酸を添加する方法、スズ塩またはス
ズ酸塩とアルカリまたは酸とを別々に並行して添加し被
覆処理する方法等がある。二酸化チタン粒子表面に酸化
スズの含水物を均一に被覆処理するには、後者の並行添
加の方法がより適しており、この時、水懸濁液を５０〜
１００℃に加温保持することがより好ましい。又、スズ
塩またはスズ酸塩とアルカリまたは酸とを並行添加する
際のｐＨを２〜９とし、酸化チタン及び水酸化スズの等
電点より、好ましくはｐＨ＝２〜３あるいはｐＨ６.５
〜８.５で維持することが重要で、これによりスズの加
水反応生成物を二酸化チタン粒子表面に均一に沈着させ
ることができる。There are various methods for forming a hydrated film of tin oxide. For example, a method of adding an alkali or acid after adding a tin salt or stannate solution to an aqueous suspension of titanium dioxide, separately adding a tin salt or stannate and an alkali or acid separately and in parallel And a coating method. In order to uniformly coat the surface of the titanium dioxide particles with the hydrated tin oxide, the latter method of parallel addition is more suitable.
It is more preferable to keep the temperature at 100 ° C. When the tin salt or stannate and the alkali or acid are added in parallel, the pH is adjusted to 2 to 9, and the isoelectric point of titanium oxide and tin hydroxide is preferably pH = 2 to 3 or pH 6.5.
It is important to keep it at ~ 8.5, so that the reaction product of tin can be uniformly deposited on the surface of the titanium dioxide particles.
【００１０】スズ塩としては、例えば、塩化スズ、硫酸
スズ、硝酸スズ等を使用することができる。また、スズ
酸塩としては、例えば、スズ酸ナトリウム、スズ酸カリ
ウム等を使用することができる。As the tin salt, for example, tin chloride, tin sulfate, tin nitrate and the like can be used. Further, as the stannate, for example, sodium stannate, potassium stannate and the like can be used.
【００１１】アルカリとしては、例えば、水酸化ナトリ
ウム、水酸化カリウム、炭酸ナトリウム、炭酸カリウ
ム、炭酸アンモニウム、アンモニア水、アンモニアガス
等、酸としては、例えば、塩酸、硫酸、硝酸、酢酸等を
使用することができる。As the alkali, for example, sodium hydroxide, potassium hydroxide, sodium carbonate, potassium carbonate, ammonium carbonate, aqueous ammonia, ammonia gas and the like are used. As the acid, for example, hydrochloric acid, sulfuric acid, nitric acid, acetic acid and the like are used. be able to.
【００１２】酸化スズの被覆量は基体顔料に対してＳn
Ｏ2として５〜１００重量％が好ましく、さらに好まし
くは１０〜５０重量％である。少な過ぎると所望の導電
性が得がたく、多過ぎると被覆が不均一になりやすく、
白度が低下する恐れがある。The coating amount of tin oxide is Sn
O 2 is preferably 5 to 100% by weight, more preferably 10 to 50% by weight. If the amount is too small, it is difficult to obtain the desired conductivity, and if the amount is too large, the coating tends to be uneven,
The whiteness may decrease.
【００１３】リンの処理方法としては、例えば、あらか
じめ、スズ塩あるいはスズ酸塩の溶液に溶解しておき、
酸化スズの含水物と同時に被膜層を形成する方法、酸化
スズの含水物の被膜を形成した後に添加する方法等があ
る。酸化スズの含水物の被覆をより均一に形成するに
は、後者の方がより好ましい。As a method for treating phosphorus, for example, a method of dissolving in a tin salt or a stannate solution in advance is used.
There are a method of forming a film layer simultaneously with the hydrated tin oxide and a method of adding the film after forming a film of the hydrated tin oxide. In order to form a coating of a hydrated tin oxide more uniformly, the latter is more preferable.
【００１４】リンの原料としては、例えば、オルトリン
酸、メタリン酸、ピロリン酸、トリポリリン酸、亜リン
酸、次亜リン酸およびこれらのアンモニウム塩、ナトリ
ウム塩、カリウム塩等を使用することができる。As a raw material of phosphorus, for example, orthophosphoric acid, metaphosphoric acid, pyrophosphoric acid, tripolyphosphoric acid, phosphorous acid, hypophosphorous acid, and ammonium salts, sodium salts and potassium salts thereof can be used.
【００１５】リンの添加量はＳnＯ2に対して、Ｐとして
０.１〜１０重量％、好ましくは０.３〜５重量％であ
り、少な過ぎると所望の導電性が得られず、多過ぎると
酸化スズの結晶性が悪くなり、所望の導電性が得られな
い。かかる量のリンを添加することにより、無添加のも
のに比べ電気抵抗を更に１／１０〜１／２０程度低くす
ることができることが本発明の特徴である。The amount of phosphorus added is 0.1 to 10% by weight, preferably 0.3 to 5% by weight, as P, based on SnO 2. If the amount is too small, the desired conductivity cannot be obtained, and the amount is too large. In addition, the crystallinity of tin oxide deteriorates, and the desired conductivity cannot be obtained. It is a feature of the present invention that by adding such an amount of phosphorus, the electric resistance can be further reduced by about 1/10 to 1/20 as compared with the case where no phosphorus is added.
【００１６】なお、本明細書において、「導電性」粉末
とは、粉体の電気比抵抗値として１〜５００Ω・ｃｍの
値を有するものを意味する。後述の実施例においても示
されるように、本発明により１００Ω・ｃｍ以下という
良好な値を有する二酸化チタン粉末を得ることができ
る。In the present specification, "conductive" powder means a powder having an electric resistivity of 1 to 500 Ω · cm. As will be shown in Examples described later, a titanium dioxide powder having a favorable value of 100 Ω · cm or less can be obtained by the present invention.
【００１７】加熱処理を行う際には、５００〜８００℃
で非酸化性雰囲気にて行うことが好ましく、空気中で加
熱処理したものと比べ粉体の電気抵抗を少なくとも３桁
以上、場合により４桁低くすることができる。非酸化性
雰囲気とするためには、不活性ガスあるいは、還元性ガ
スが使用できる。不活性ガスとしては例えば、窒素、ヘ
リウム、アルゴン、炭酸ガス等を使用することができ
る。還元性ガスとしては、例えば、水素、アンモニア、
一酸化炭素等を使用することができる。好ましくは、窒
素ガスなどの不活性ガスを１〜１０リットル／分程度吹
き込みながら加熱処理を行うことにより、性状の安定し
たものが得られる。When the heat treatment is performed, the temperature is 500 to 800 ° C.
Is preferably performed in a non-oxidizing atmosphere, and the electrical resistance of the powder can be reduced by at least three digits or more, and in some cases, four orders of magnitude, as compared with the case where the powder is heat-treated in air. In order to obtain a non-oxidizing atmosphere, an inert gas or a reducing gas can be used. As the inert gas, for example, nitrogen, helium, argon, carbon dioxide, or the like can be used. Examples of the reducing gas include hydrogen, ammonia,
Carbon monoxide or the like can be used. Preferably, by performing a heat treatment while blowing an inert gas such as a nitrogen gas at a rate of about 1 to 10 liter / minute, a substance having a stable property can be obtained.
【００１８】加熱する際の温度は５００〜８００℃が好
ましく、この範囲より低い場合にはさして導電性の向上
がみられず、高い場合には焼結等の問題が起こる恐れが
ある。又、加熱時間は、短かすぎる場合には加熱効果が
なく、長すぎてもそれ以上の効果が望めないことから、
１５分〜４時間程度が適当であり、好ましくは、１〜２
時間程度である。The temperature at the time of heating is preferably 500 to 800 ° C. If the temperature is lower than this range, no further improvement in conductivity is observed. If the temperature is higher, problems such as sintering may occur. In addition, the heating time is too short, there is no heating effect, too long because no further effect can be expected,
About 15 minutes to 4 hours is appropriate, preferably 1 to 2 hours.
About an hour.
【００１９】以下に実施例を挙げて本発明をさらに詳細
に説明する。以下の実施例は単に例示の為に記すもので
あり、発明の範囲がこれらによって制限されるものでは
ない。Hereinafter, the present invention will be described in more detail with reference to examples. The following examples are provided for illustrative purposes only, and are not intended to limit the scope of the invention.
【００２０】実施例１ 平均粒径０.２２μｍのルチル型二酸化チタン粉末３０
０ｇを水３リットルに分散させて水懸濁液とした。この
懸濁液を７０℃に加温保持した。別途用意した、塩化第
二スズ（ＳnＣｌ4・５Ｈ2Ｏ ９８重量％）１６０.５ｇを
２Ｎ塩酸１.５リットルに溶かした溶液と１２重量％ア
ンモニア水とを、懸濁液のｐＨを７〜８に保持する様に
約２時間かけて、同時滴下した。さらに、オルトリン酸
１.１ｇを水１０ミリリットルに溶解した水溶液を添加
した後、３０分間撹拌し、二酸化チタン粒子表面にリン
を含んだ酸化スズの含水物を被覆処理し、処理懸濁液を
濾過、洗浄し、得られた処理二酸化チタンのケーキを１
１０℃で乾燥した。次いで、得られた乾燥粉末を窒素ガ
ス気流中（３リットル／分）で６５０℃で１時間熱処理
して、目的とする白色導電性二酸化チタン粉末を得た。Example 1 Rutile-type titanium dioxide powder 30 having an average particle size of 0.22 μm
0 g was dispersed in 3 liters of water to obtain an aqueous suspension. This suspension was kept warm at 70 ° C. Separately prepared, and a solution with 12 wt% ammonia water prepared by dissolving stannic chloride (SnCl 4 · 5H 2 O 98% by weight) 160.5 g of 2N hydrochloric acid 1.5 liters 7 the pH of the suspension The mixture was dropped simultaneously over about 2 hours so as to keep the temperature at 8. Further, after adding an aqueous solution in which 1.1 g of orthophosphoric acid is dissolved in 10 ml of water, the mixture is stirred for 30 minutes, the surface of the titanium dioxide particles is coated with a hydrate of tin oxide containing phosphorus, and the treated suspension is filtered. , Washed and the resulting treated titanium dioxide cake in 1
Dried at 10 ° C. Next, the obtained dry powder was heat-treated at 650 ° C. for 1 hour in a nitrogen gas stream (3 L / min) to obtain a target white conductive titanium dioxide powder.
【００２１】実施例２ 実施例１において、塩化第二スズ１６０.５ｇの代わり
に、２４４.２ｇ、オルトリン酸１.１ｇの代わりに１.
７ｇを用いたことのほかは同例の場合と同様に処理し
て、目的とする白色導電性二酸化チタン粉末を得た。Example 2 In Example 1, 244.2 g was used instead of 160.5 g of stannic chloride, and 1.1 g instead of 1.1 g of orthophosphoric acid.
Except for using 7 g, the same treatment as in the same example was carried out to obtain a target white conductive titanium dioxide powder.
【００２２】実施例３ 実施例１においてオルトリン酸１.１ｇの代わりに６.６
ｇを用いたことのほかは同例の場合と同様に処理した。Example 3 In Example 1, instead of 1.1 g of orthophosphoric acid, 6.6 was used.
Except for using g, the treatment was the same as in the same example.
【００２３】実施例４ 実施例２においてオルトリン酸１.７ｇの代わりに５.４
ｇを用いたことのほかは同例の場合と同様に処理した。Example 4 In Example 2, 5.4 g of orthophosphoric acid was used instead of 1.7 g of orthophosphoric acid.
Except for using g, the treatment was the same as in the same example.
【００２４】比較例１ オルトリン酸を添加しないことのほかは、実施例１と同
様に処理した。Comparative Example 1 The procedure of Example 1 was repeated except that orthophosphoric acid was not added.
【００２５】比較例２ オルトリン酸を添加しないことのほかは、実施例２と同
様に処理した。Comparative Example 2 The procedure of Example 2 was repeated except that orthophosphoric acid was not added.
【００２６】粉体の電気比抵抗の測定 前記の実施例および比較例で得られた各粉末試料を２３
０ｋｇ／ｃｍ2の圧力の加圧成形した状態（直径２５.４
ｍｍ、厚さ３.３ｍｍ）での電気抵抗を横河−ヒューレ
ット・パッカード社製デジタルＬＣＲメータ４２６１Ａ
にて測定し、比抵抗に換算した。これらの結果を表１に
示す。Measurement of Electric Resistivity of Powder Each powder sample obtained in the above Examples and Comparative Examples was
0 kg / cm 2 pressure molded state (diameter 25.4)
mm, thickness 3.3 mm) by using a digital LCR meter 4261A manufactured by Yokogawa-Hewlett-Packard Company.
And converted to specific resistance. Table 1 shows the results.
【００２７】[0027]
【表１】 表１ 酸化スズ被覆量 リン被覆量 加熱処理 粉体の電気比抵抗 （重量％） P/SnO2（重量%） (６５０℃,1時間） （Ω・ｃｍ） 実施例１ ２３ ０.５ 窒素中 ２９ 実施例２ ３５ ０.５ 〃 ９０ 実施例３ ２３ ３ 〃 ３３ 実施例４ ３５ ３ 〃 ８７ 比較例１ ２３ ０ 〃 ６３３ 比較例２ ３５ ０ 〃 ２２００Table 1 Tin oxide coating amount Phosphorous coating amount Heat treatment Electrical resistivity of powder (% by weight) P / SnO 2 (% by weight) (650 ° C., 1 hour) (Ω · cm) Example 1 230 2.5 in nitrogen 29 Example 2 35 0.5 ９０ 90 Example 3 233 ３３ 33 Example 4 353 ８７ 87 Comparative Example 1 230 〃 633 Comparative Example 2 350 〃 2200
【００２８】[0028]
【発明の効果】本発明は毒性上の問題のあるアンチモン
を使用することなく種々の分野に利用できる導電性に優
れた白色度の高い導電性二酸化チタン粉末を、比較的容
易に製造するものであり、工業的に高い利点がある。According to the present invention, conductive titanium dioxide powder having high conductivity and high whiteness, which can be used in various fields without using antimony which has a toxicity problem, can be produced relatively easily. Yes, there are high industrial advantages.
フロントページの続き (72)発明者 森下 正育 山口県宇部市大字小串1978番地の25 チ タン工業株式会社内 (56)参考文献 特開 昭58−209002（ＪＰ，Ａ) 特開 平４−154621（ＪＰ，Ａ) 特開 昭63−11519（ＪＰ，Ａ) 特開 昭64−54613（ＪＰ，Ａ) 特開 平４−363366（ＪＰ，Ａ) 特開 平５−262526（ＪＰ，Ａ) 特開 平６−183708（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) C09C 1/00 - 3/12 C01G 23/00 - 23/08 H01B 1/00 - 1/24 C09D 5/24 C08K 3/00 - 3/40 C08K 9/02 Continuing from the front page (72) Inventor Masayuki Morishita Inside of 25 Titan Kogyo Co., Ltd. at 1978 Kogushi, Ube City, Yamaguchi Prefecture (56) References JP-A-58-209002 (JP, A) JP-A-4-154621 (JP, A) JP-A-63-11519 (JP, A) JP-A-64-54613 (JP, A) JP-A-4-363366 (JP, A) JP-A-5-262526 (JP, A) Kaihei 6-183708 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) C09C 1/00-3/12 C01G 23/00-23/08 H01B 1/00-1/24 C09D 5/24 C08K 3/00-3/40 C08K 9/02
Claims (4)
含まずにリンを０．１〜１０重量％含む酸化スズの被膜
層を有し、該被膜層を有する二酸化チタン粒子が不活性
ガスで加熱処理されており、且つ２３０ｋｇ／ｃｍ2の
圧力で加圧成形された成形体が１００Ω・ｃｍ以下の電
気比抵抗を有することを特徴とする白色導電性二酸化チ
タン粉末。1. An antimony on the surface of titanium dioxide particles
A coating layer of tin oxide containing 0.1 to 10% by weight of phosphorus and containing no titanium dioxide particles, the titanium dioxide particles having the coating layer are heat-treated with an inert gas, and are applied under a pressure of 230 kg / cm 2. A white conductive titanium dioxide powder, wherein the pressed body has an electrical resistivity of 100 Ω · cm or less.
粉末の製造方法であって、二酸化チタン粒子表面へスズ
の加水反応生成物を均一に沈着させ、その後リンを酸化
スズに対し０．１〜１０重量％被膜させ、そして、不活
性ガスで加熱処理することを特徴とする製造方法。2. The method for producing a white conductive titanium dioxide powder according to claim 1, wherein a reaction product of tin is uniformly deposited on the surface of the titanium dioxide particles, and then phosphorus is added to the tin oxide in an amount of 0.1%. A method for producing a film, wherein the film is coated with 10 to 10% by weight and heat-treated with an inert gas.
性雰囲気にて５００〜８００℃で加熱処理することであ
ることを特徴とする請求項２記載の製造方法。3. The method according to claim 2, wherein the heat treatment with the inert gas is a heat treatment at 500 to 800 ° C. in a non-oxidizing atmosphere.
ガスを吹き込みながら行うことであることを特徴とする
請求項３記載の白色導電性二酸化チタン粉末の製造方
法。4. The method for producing a white conductive titanium dioxide powder according to claim 3, wherein the heat treatment with the inert gas is performed while blowing the inert gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP00335593A JP3357107B2 (en) | 1993-01-12 | 1993-01-12 | White conductive titanium dioxide powder and method for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP00335593A JP3357107B2 (en) | 1993-01-12 | 1993-01-12 | White conductive titanium dioxide powder and method for producing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06207118A JPH06207118A (en) | 1994-07-26 |
| JP3357107B2 true JP3357107B2 (en) | 2002-12-16 |
Family
ID=11555046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP00335593A Expired - Lifetime JP3357107B2 (en) | 1993-01-12 | 1993-01-12 | White conductive titanium dioxide powder and method for producing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3357107B2 (en) |
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|---|---|---|---|---|
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- 1993-01-12 JP JP00335593A patent/JP3357107B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7407606B2 (en) | 2003-07-23 | 2008-08-05 | Ishihara Sangyo Kaisha, Ltd. | Electroconductive powder and method for production thereof |
| US7514124B2 (en) | 2003-07-23 | 2009-04-07 | Kansai Paint Co., Ltd. | White electrically conductive primer composition and method for forming multilayer coating film |
| WO2011015268A1 (en) | 2009-08-03 | 2011-02-10 | Merck Patent Gmbh | Conductive powder |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06207118A (en) | 1994-07-26 |
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