JPH07292277A - Titanium dioxide pigment - Google Patents

Titanium dioxide pigment

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Publication number
JPH07292277A
JPH07292277A JP12669794A JP12669794A JPH07292277A JP H07292277 A JPH07292277 A JP H07292277A JP 12669794 A JP12669794 A JP 12669794A JP 12669794 A JP12669794 A JP 12669794A JP H07292277 A JPH07292277 A JP H07292277A
Authority
JP
Japan
Prior art keywords
oxide
compound
zirconium
aluminum
titanium dioxide
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.)
Pending
Application number
JP12669794A
Other languages
Japanese (ja)
Inventor
Kuniteru Ishida
邦輝 石田
Hiroshi Fukumoto
寛 福本
Tsutomu Yamamoto
務 山本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sakai Chemical Industry Co Ltd
Original Assignee
Sakai Chemical Industry Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sakai Chemical Industry Co Ltd filed Critical Sakai Chemical Industry Co Ltd
Priority to JP12669794A priority Critical patent/JPH07292277A/en
Publication of JPH07292277A publication Critical patent/JPH07292277A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To obtain a pigment which can give a coating film improved in weathering resistance without detriment to the ability to develop gloss by coating the surface of rutile titanium dioxide with specified amounts of silicon oxide, tin oxide, zirconium oxide and aluminum oxide. CONSTITUTION:The surface of rutile titanium dioxide (herein-below referred to as a substrate) containing 0.1-2wt.% (in terms of Al2O3) aluminum compound, or containing 0.1-5wt.% (in terms of Al2O3 and ZrO2) both aluminum compound and zirconium compound is coated with 1-6wt.% (in terms of SiO2) silicon oxide 0.1-3wt.% (in terms of SnO2) tin oxide, 0.1-5wt.% (in terms of ZrO2) zirconium oxide and 1-5wt.% (in terms of Al2O3) aluminum oxide. The amount of the substrate used is 81-97.8 wt. %. The substrate is mixed with specified amounts of titanium hydroxide, an aluminum compound and a zirconium compound, and the resulting mixture is fired at 900-1000 deg.C. The objective pigment is obtained by successively adding a silicon compound, a tin compound, a zirconium compound and an aluminum compound to a water slurry of the substrate to deposit them on the surface of the substrate.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は最近の、例えば自動車、
家電機器、工業用機器、建築物等の高級塗装仕上げ指向
を満足する塗料及びプラスチックスに必要な光沢発現
性、また長期屋外暴露時の耐久性いわゆる耐候性に優れ
た白色顔料として好適な二酸化チタンに関する。
FIELD OF THE INVENTION The present invention has been recently developed, for example in automobiles,
Titanium dioxide suitable as a white pigment excellent in glossiness required for paints and plastics that satisfy the high-quality paint finish orientation for home appliances, industrial equipment, buildings, etc., and also excellent in weather resistance after long-term outdoor exposure Regarding

【0002】[0002]

【従来の技術】従来からこの様な要求を満たすために数
多くの提案がなされており、チタニル硫酸溶液を加水分
解して得られた溶液に無機系化合物を添加したり、二酸
化チタン表面を被覆する方法が行われてきた。後者の方
法の1つとして無定形の高密度シリカを被覆し、その上
層に例えばアルミニウムの水和酸化物の被覆を施す方法
があるが、耐候性には有効である半面、顔料として要求
される分散性及び光沢が充分得られない。最近では二酸
化チタン表面に錫及びジルコニウムの水和酸化物を被覆
し、その外部にアルミニウムの水和酸化物を被覆する方
法(特願昭55−162373)や、二酸化チタン表面
に最内層として錫及びジルコニウムの水和酸化物、中間
層としてチタンの水和酸化物、最外層としてアルミニウ
ムの水和酸化物をそれぞれ被覆する方法(特願昭60−
122018)等が挙げられる。しかし要求性能が次第
に高度になり、これらの要請を完全に満足することが難
しくなってきた。
2. Description of the Related Art Many proposals have hitherto been made in order to meet such requirements, and an inorganic compound is added to a solution obtained by hydrolyzing a titanyl sulfuric acid solution or a titanium dioxide surface is coated. The method has been done. As one of the latter methods, there is a method in which amorphous high-density silica is coated and an upper layer thereof is coated with, for example, a hydrated oxide of aluminum, but it is effective for weather resistance, but it is required as a pigment. Sufficient dispersibility and gloss cannot be obtained. Recently, a method of coating hydrated oxides of tin and zirconium on the surface of titanium dioxide and coating the hydrated oxide of aluminum on the outside (Japanese Patent Application No. 55-162373), or tin and zirconium as the innermost layer on the surface of titanium dioxide. A method of coating a hydrated oxide of zirconium, a hydrated oxide of titanium as an intermediate layer, and a hydrated oxide of aluminum as an outermost layer (Japanese Patent Application No. 60-
122018) and the like. However, the required performance has become more sophisticated, and it has become difficult to completely satisfy these requirements.

【0003】[0003]

【発明が解決しようとする課題】本発明は前記問題点を
解決せんとするものであって、二酸化チタン粒子表面に
重層で複数の無機系化合物が被覆されていても、粘膜の
光沢発現性を損なうことなく耐候性に優れた性能をもつ
被覆二酸化チタン顔料が得られることの知見を得、特に
高度の耐候性、塗膜光沢が要求される自動車等の高級塗
装仕上げ用塗料に好適な二酸化チタン顔料を提供するこ
とを目的とする。
DISCLOSURE OF THE INVENTION The present invention is intended to solve the above-mentioned problems. Even if the surface of titanium dioxide particles is coated with a plurality of inorganic compounds in a multi-layer structure, the mucosal gloss developability is improved. We obtained the finding that a coated titanium dioxide pigment with excellent weather resistance can be obtained without damaging it, and titanium dioxide suitable for high-grade paint finishes for automobiles, etc., where particularly high weather resistance and coating gloss are required. The purpose is to provide a pigment.

【0004】[0004]

【課題を解決するための手段】本発明はアルミニウム化
合物をAlとして0.1〜2重量%あるいはアル
ミニウム化合物とジルコニウム化合物をAl,Z
として含量で0.1〜5重量%存在させたものを
含有するルチル型二酸化チタン(以下基体という)の表
面に酸化珪素、酸化錫、酸化ジルコニウム及び酸化アル
ミニウムをS,S,Z,Al
としてそれぞれ1〜6重量%、0.1〜3重量%、0.
1〜5重量%、1〜5重量%存在させた二酸化チタン顔
料(基体が81〜97.8重量%)である。
According to the present invention, 0.1 to 2 % by weight of aluminum compound is Al 2 O 3 or aluminum compound and zirconium compound are Al 2 O 3 , Z.
silicon oxide on the surface of the rutile titanium dioxide containing what was content in the presence of 0.1 to 5 wt% as r O 2 (hereinafter referred to as substrate), tin oxide, zirconium oxide and aluminum oxide S i O 2, S n O 2, Z r O 2 , Al 2 O 3
1 to 6% by weight, 0.1 to 3% by weight, and 0.
1 to 5% by weight, and 1 to 5% by weight of titanium dioxide pigment (base: 81 to 97.8% by weight).

【0005】ここで基体はチタニル硫酸溶液あるいは四
塩化チタンを加水分解して得られる水酸化チタン(メタ
チタン酸等)に所定量のアルミニウム、ジルコニウム化
合物を混合し、900〜1,000℃で焼成したもので
ある。使用するアルミニウム、ジルコニウム化合物とし
ては硫酸アルミニウム、水酸化アルミニウム、硫酸ジル
コニウム、炭酸ジルコニウム等が挙げられる。
Here, the substrate is a titanyl sulfuric acid solution or titanium hydroxide (meta-titanic acid, etc.) obtained by hydrolyzing titanium tetrachloride with a predetermined amount of an aluminum or zirconium compound and baked at 900 to 1,000 ° C. It is a thing. Examples of the aluminum and zirconium compounds used include aluminum sulfate, aluminum hydroxide, zirconium sulfate, zirconium carbonate and the like.

【0006】アルミニウム酸化物の存在量はAl
として0.1〜2重量%であり、アルミニウム酸化物と
ジルコニウム酸化物の合量の存在量はAl,Z
の合計として0.1〜5重量%であり、0.1重量
%以下では耐候性に関して満足な結果が得られず、2重
量%(合量の場合は5重量%)以上では白色度、分散性
等の顔料特性、また塗膜性能に劣る。
The abundance of aluminum oxide is Al 2 O 3
As a 0.1-2 wt%, the abundance of the total amount of aluminum oxide and zirconium oxide is Al 2 O 3, Z r
The total amount of O 2 is 0.1 to 5% by weight, and when 0.1% by weight or less, satisfactory results are not obtained with respect to weather resistance, and when 2% by weight (5% by weight in the case of total amount) or more, whiteness is obtained. , Inferior in pigment properties such as dispersibility and coating film performance.

【0007】該基体に珪素の酸化物、錫の酸化物、ジル
コニウムの酸化物、アルミニウムの酸化物を存在させる
には該基体100〜500g/lの水性スラリーを50
〜100℃に保ち、所定量の珪素化合物を一定のpHを
保ちながら徐々に添加、あるいは添加した後徐々に中和
して酸化物又は水和酸化物として基体の表面に沈着さ
せ、30〜90分間熟成反応を行った後、錫化合物、ジ
ルコニウム化合物の水溶液を同時、あるいは順番に添加
し徐々に中和して酸化物又は水和酸化物として基体の表
面に沈着させ、30〜90分間熟成反応を行い、さらに
アルミニウム化合物の水溶液を一定のpHを保ちながら
徐々に添加して酸化物又は水和酸化物として基体の表面
に沈着させ、30〜90分間熟成反応を行った後、水洗
濾過し乾燥後粉砕処理を施して二酸化チタン顔料製品と
する。
In order to allow silicon oxide, tin oxide, zirconium oxide, and aluminum oxide to be present in the substrate, 50 to 100 g / l of the aqueous slurry of the substrate is used.
Maintained at -100 ° C and a predetermined amount of a silicon compound is gradually added while maintaining a constant pH, or after being added, the mixture is gradually neutralized to be deposited as an oxide or hydrated oxide on the surface of the substrate. After aging for 30 minutes, an aqueous solution of a tin compound and a zirconium compound are added simultaneously or in sequence and gradually neutralized to deposit as oxides or hydrated oxides on the surface of the substrate, and aging reaction for 30 to 90 minutes Then, an aqueous solution of an aluminum compound is gradually added while keeping a constant pH to deposit it on the surface of the substrate as an oxide or a hydrated oxide. After aging reaction for 30 to 90 minutes, washing with water, filtration and drying are performed. Post-grinding is performed to obtain a titanium dioxide pigment product.

【0008】使用する水溶性の珪素化合物、水溶性の錫
化合物、水溶性のジルコニウム化合物、水溶性のアルミ
ニウム化合物はケイ酸ナトリウム、ケイ酸カリウム、塩
化スズ、硫酸ジルコニウム、塩化ジルコニウム、硝酸ジ
ルコニウム、硫酸アルミニウム、アルミン酸ナトリウ
ム、硝酸ナトリウム等が挙げられる。
The water-soluble silicon compound, water-soluble tin compound, water-soluble zirconium compound and water-soluble aluminum compound used are sodium silicate, potassium silicate, tin chloride, zirconium sulfate, zirconium chloride, zirconium nitrate and sulfuric acid. Aluminum, sodium aluminate, sodium nitrate, etc. may be mentioned.

【0009】珪素化合物、錫化合物、ジルコニウム化合
物、アルミニウム化合物はSとして1〜6重量
%、Sとして0.1〜3重量%,Zとして
0.1〜5重量%、Alとして1〜5重量%であ
る。
[0009] Silicon compounds, tin compounds, zirconium compounds, aluminum compounds 1-6 wt% as S i O 2, 0.1 to 3 wt% as S n O 2, 0.1 to 5 weight as Z r O 2 %, And Al 2 O 3 is 1 to 5% by weight.

【0010】珪素化合物がSとして1重量%以下
では耐候性に対する効果が小さく、6重量%以上では光
沢が低くなる。錫化合物がSとして0.1以下で
は耐候性に対する効果が小さく、3重量%以上では分散
性、光沢が低下するなど顔料特性、塗膜性能が損なわれ
る。ジルコニウム化合物がZとして0.1重量%
以下では耐候性に対する効果が小さく、5重量%以上で
は隠蔽力が落ちる。アルミニウム化合物がAl
して1重量%以下では耐候性に対する効果が小さく、5
重量%以上では隠蔽力が落ちる。
If the silicon compound is 1 wt% or less as S i O 2 , the effect on the weather resistance is small, and if it is 6 wt% or more, the gloss becomes low. Tin compounds is less effect on the weather resistance is 0.1 or less as S n O 2, pigment properties like dispersibility, gloss decreases, film performance is impaired at 3 wt% or more. Zirconium compound as Z r O 2 0.1 wt%
If it is less than 5% by weight, the hiding power will be poor. When the amount of the aluminum compound as Al 2 O 3 is 1% by weight or less, the effect on the weather resistance is small and 5
If it is more than 10% by weight, the hiding power will decrease.

【0011】[0011]

【実施例】以下に実施例により具体的に説明する。[Examples] Specific examples will be described below.

【実施例1】チタニル硫酸溶液を加水分解し、水洗濾過
することによって得られるメタチタン酸に、重量基準で
Alとして0.5%の硫酸アルミニウム水溶液を
添加し十分に混練した後焙焼して得られた二酸化チタン
基体の水性スラリー(T濃度380g/l)を6
0℃に加熱後ケイ酸ナトリウム溶液を該基体の重量基準
でSとして5%添加してこのスラリー温度を80
℃とした。次いで硫酸を60分間かけて添加し、スラリ
ーのpHを4に調整して二酸化チタンの表面に珪素の水
和酸化物を沈殿させ、その後60分間熟成させた。引続
きスラリー温度を70℃としpHを水酸化ナトリウム水
溶液で8.5に維持しながら50分間かけて塩化第一錫
溶液を該基体の重量基準でSとして0.5%添加
して錫の水和酸化物を沈殿させ、その後20分間熟成さ
せた。さらに水酸化ナトリウム水溶液でpHを8.5に
維持しながら50分間かけて硫酸ジルコニウム溶液を該
基体の重量基準でZとして1.2%添加してジル
コニウムの水和酸化物を沈殿させ、その後20分間熟成
させた。引続き硫酸溶液でpHを8.5に維持しながら
90分間かけてアルミン酸ナトリウム溶液を該基体の重
量基準でAlとして3.5%添加してアルミニウ
ムの水和酸化物を沈殿させ、その後20分間熟成させ
た。次いで硫酸溶液を添加してスラリーのpHを7と
し、60分間熟成した後水洗濾過し、130℃で5時間
乾燥し、粉砕して珪素、錫、ジルコニウム及びアルミニ
ウムの水和酸化物で被覆された本発明の二酸化チタン顔
料を得た。(顔料A)
Example 1 A metatitanic acid obtained by hydrolyzing a titanyl sulfuric acid solution, washing with water, and filtering was added with a 0.5% aqueous solution of aluminum sulfate as Al 2 O 3 on a weight basis, sufficiently kneaded, and then roasted. The titanium dioxide-based aqueous slurry (T i O 2 concentration 380 g / l) obtained by
0 ℃ after heating sodium silicate solution based on the weight of said substrate to be added 5% as S i O 2 The slurry temperature 80
℃ was made. Then, sulfuric acid was added over 60 minutes, the pH of the slurry was adjusted to 4, and a hydrated oxide of silicon was precipitated on the surface of titanium dioxide, followed by aging for 60 minutes. Tin was subsequently added 0.5% stannous chloride solution over 50 minutes while maintaining the slurry temperature to 8.5 pH with aqueous sodium hydroxide and 70 ° C. as S n O 2 by weight of the base body The hydrated oxide of 1. was precipitated and then aged for 20 minutes. PH to precipitate the Z r O 2 as an additive to the hydrated oxide of zirconium 1.2% in over 50 minutes while maintaining the 8.5 weight of said substrate a zirconium sulfate solution further sodium hydroxide solution Then, it was aged for 20 minutes. Subsequently, while maintaining the pH at 8.5 with a sulfuric acid solution, sodium aluminate solution was added 3.5% as Al 2 O 3 based on the weight of the substrate over 90 minutes to precipitate a hydrated oxide of aluminum, Then, it was aged for 20 minutes. Next, a sulfuric acid solution was added to adjust the pH of the slurry to 7, the mixture was aged for 60 minutes, washed with water, filtered, dried at 130 ° C. for 5 hours, pulverized, and coated with a hydrated oxide of silicon, tin, zirconium, and aluminum. A titanium dioxide pigment of the present invention was obtained. (Pigment A)

【0012】[0012]

【実施例2】二酸化チタン基体の製法で、重量基準でA
として0.5%の硫酸アルミニウム水溶液及び
重量基準でZとして1.0%の炭酸ジルコニウム
水溶液をメタチタン酸に添加し、焙焼することで得られ
るアルミニウム及びジルコニウムを含有する二酸化チタ
ン基体の水性スラリーを使用すること以外は実施例1と
同様に被覆処理して本発明の酸化チタン顔料を得た。
(顔料B)
[Example 2] A method of manufacturing a titanium dioxide substrate, in which A was used on a weight basis.
It contains aluminum and zirconium which are obtained by adding 0.5% aluminum sulfate aqueous solution as l 2 O 3 and 1.0% zirconium carbonate aqueous solution as Z r O 2 to metatitanic acid on a weight basis and roasting. The titanium oxide pigment of the present invention was obtained by the same coating treatment as in Example 1 except that an aqueous slurry of titanium dioxide base was used.
(Pigment B)

【0013】[0013]

【比較例】実施例1,2の本発明顔料と比較するため、
次の様にして顔料C〜Fを製造した。 C:硫酸アルミニウム水溶液、炭酸ジルコニウム水溶液
の何れも添加しない二酸化チタンの水性スラリーを使用
すること以外は実施例1と同様に被覆処理した。 D:錫の水和酸化物を被覆処理しないこと以外は実施例
1と同様に処理した。 E:錫及びジルコニウムの水和酸化物を被覆処理しない
こと以外は実施例1と同様に処理した。 F:珪素の水和酸化物を被覆処理しないこと以外は実施
例1と同様に処理した。
Comparative Example To compare with the pigments of the present invention of Examples 1 and 2,
Pigments C to F were manufactured as follows. C: The coating treatment was performed in the same manner as in Example 1 except that an aqueous slurry of titanium dioxide to which neither an aqueous solution of aluminum sulfate nor an aqueous solution of zirconium carbonate was added was used. D: Treated in the same manner as in Example 1 except that the hydrated oxide of tin was not coated. E: The same treatment as in Example 1 was performed except that the hydrated oxide of tin and zirconium was not coated. F: The same treatment as in Example 1 was performed except that the hydrated oxide of silicon was not coated.

【試験例】前記実施例及び比較例の二酸化チタン顔料A
〜Fについてその性能を試験し表1の結果を得た。
[Test Example] Titanium dioxide pigment A of the above Examples and Comparative Examples
The performance was tested for ~ F and the results shown in Table 1 were obtained.

【0014】[0014]

【表1】 [Table 1]

【0015】表1の性能評価は次の様にして行った。The performance evaluation in Table 1 was performed as follows.

【評価方法】【Evaluation methods】

試験片の作成 A〜Fの二酸化チタン顔料をオイルフリーアルキド樹脂
/メラミン樹脂(4/1重量比)ワニス中へ混和し、ペ
イントシェーカー(レッドデビル社製#5110)で分
散塗料化した後、化成被膜処理軟鋼板に約45μ厚(焼
付け後塗膜として)塗布し、140℃で30分間焼付け
てこれを試験片とした。 鏡面光沢の測定 試験板の初期光沢(60゜−60゜鏡面光沢)及び暴露
後光沢の測定にはグロスメーター(村上色彩技術研究所
製、GM−26)を用いて行った。 促進耐候性評価 促進耐候性評価はカーボンアーク型サンシャインウエザ
ーメーター装置(スガ試験機KK製、WE−SUN−D
C型)内で試験片を促進暴露し、一定時間毎に上記「鏡
面光沢の測定」に従って評価した。また白亜化度は日本
塗料検査協会の塗膜評価基準に従って測定した960時
間暴露後の塗膜表面の白亜化発生程度で評価した。ここ
で白亜化発生程度は10を白亜化が発生していないこと
とし、10〜0までの評価で数値が小さくなるに従って
白亜化発生程度が大きいことを示す。
Preparation of test pieces The titanium dioxide pigments A to F were mixed in an oil-free alkyd resin / melamine resin (4/1 weight ratio) varnish, and dispersed into a paint with a paint shaker (Red Devil Co. # 5110), followed by chemical conversion. The coated mild steel sheet was applied with a thickness of about 45 μm (as a coating film after baking) and baked at 140 ° C. for 30 minutes to prepare a test piece. Measurement of specular gloss The initial gloss (60 ° -60 ° specular gloss) of the test plate and the gloss after exposure were measured using a gloss meter (GM-26 manufactured by Murakami Color Research Laboratory). Accelerated weathering resistance evaluation Accelerated weathering resistance evaluation was carried out using a carbon arc type sunshine weather meter device (made by Suga Testing Machine KK, WE-SUN-D
The test piece was subjected to accelerated exposure in (C type) and evaluated at regular intervals according to the above "Measurement of specular gloss". The degree of chalking was evaluated by the degree of chalking on the surface of the coating film after exposure for 960 hours, which was measured according to the coating film evaluation criteria of the Japan Paint Inspection Association. Here, the degree of chalking occurrence is 10 when the chalking does not occur, and indicates that the degree of chalking occurrence increases as the numerical value decreases in the evaluation of 10 to 0.

【0016】[0016]

【発明の効果】本発明により、高級塗装仕上げ塗料に使
用されるに耐え得る高光沢を、長期にわたって維持でき
る二酸化チタン顔料を提供することができるようになっ
た。
Industrial Applicability According to the present invention, it is possible to provide a titanium dioxide pigment capable of maintaining a high gloss for a long period of time, which can be used in a high-grade paint finish.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】アルミニウム化合物をAlとして
0.1〜2重量%あるいはアルミニウム化合物とジルコ
ニウム化合物をAl,Zとして含量で0.
1〜5重量%含有するルチル型二酸化チタン(以下基体
という)の表面に酸化珪素、酸化錫、酸化ジルコニウム
及び酸化アルミニウムをS,S,Z
,Alとしてそれぞれ1〜6重量%、0.
1〜3重量%、0.1〜5重量%、1〜5重量%存在さ
せた二酸化チタン顔料(基体が81〜97.8重量
%)。
1. A 0 at a content of 0.1 to 2% by weight of aluminum compound as Al 2 O 3 or an aluminum compound and a zirconium compound as Al 2 O 3, Z r O 2.
Silicon oxide on the surface of 1 to 5% by weight content to rutile titanium dioxide (referred to hereinafter base), tin oxide, zirconium oxide and aluminum oxide S i O 2, S n O 2, Z
r O 2, Al 2 O 3, respectively 6% by weight, 0.
1-3 wt%, 0.1-5 wt%, 1-5 wt% titanium dioxide pigment present (81-97.8 wt% substrate).
JP12669794A 1994-04-28 1994-04-28 Titanium dioxide pigment Pending JPH07292277A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12669794A JPH07292277A (en) 1994-04-28 1994-04-28 Titanium dioxide pigment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12669794A JPH07292277A (en) 1994-04-28 1994-04-28 Titanium dioxide pigment

Publications (1)

Publication Number Publication Date
JPH07292277A true JPH07292277A (en) 1995-11-07

Family

ID=14941616

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12669794A Pending JPH07292277A (en) 1994-04-28 1994-04-28 Titanium dioxide pigment

Country Status (1)

Country Link
JP (1) JPH07292277A (en)

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WO2006012969A1 (en) * 2004-07-31 2006-02-09 Kronos International, Inc. Method for post-treating titanium dioxide pigments
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WO2006012969A1 (en) * 2004-07-31 2006-02-09 Kronos International, Inc. Method for post-treating titanium dioxide pigments
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EP2202278A1 (en) 2008-12-25 2010-06-30 Sakai Chemical Industry Co., Ltd. Titanium dioxide pigment and method for producing the same
JP2010280852A (en) * 2009-06-05 2010-12-16 Kaneka Corp Resin composition for aqueous paint, and paint obtained by compounding resin composition for aqueous paint
EP2267088A2 (en) 2009-06-26 2010-12-29 Sakai Chemical Industry Co., Ltd. Surface-modified titanium dioxide particle and method for producing the same
JP2011006292A (en) * 2009-06-26 2011-01-13 Sakai Chem Ind Co Ltd Titanium dioxide particles and method for producing the same
US8070874B2 (en) 2009-06-26 2011-12-06 Sakai Chemical Industry, Co., Ltd. Surface-modified titanium dioxide particle and method for producing the same
JP2015093901A (en) * 2013-11-11 2015-05-18 アイカ工業株式会社 Aqueous coating material composition
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