JPH0686292B2 - Plate-shaped barium sulfate and method for producing the same - Google Patents
Plate-shaped barium sulfate and method for producing the sameInfo
- Publication number
- JPH0686292B2 JPH0686292B2 JP5564590A JP5564590A JPH0686292B2 JP H0686292 B2 JPH0686292 B2 JP H0686292B2 JP 5564590 A JP5564590 A JP 5564590A JP 5564590 A JP5564590 A JP 5564590A JP H0686292 B2 JPH0686292 B2 JP H0686292B2
- Authority
- JP
- Japan
- Prior art keywords
- plate
- barium
- barium sulfate
- sulfate
- shaped
- 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
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- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、使用感、透明性及び隠蔽性に優れた板状硫酸
バリウム及びその製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a plate-like barium sulfate excellent in usability, transparency and concealing property, and a method for producing the same.
〔従来の技術及び発明が解決しようとする課題〕 硫酸バリウムは人体に対して無害であり、かつ隠蔽力も
強いため、Ｘ線の造影剤、γ線吸収材や白色顔料等工業
的に広く使用されている。しかしながら、化粧品、特に
その中でもファンデーションとして使用するには、従来
の硫酸バリウムは伸びや付きが悪く、使用感に欠けてい
たり、また透明感ににも欠け、化粧後に素肌感覚が劣る
という欠点を有していた。[Problems to be Solved by the Related Art and Invention] Barium sulfate is harmless to the human body and has a strong hiding power, and is therefore widely used industrially such as X-ray contrast agents, γ-ray absorbers and white pigments. ing. However, when used as cosmetics, especially as a foundation among them, conventional barium sulfate has a drawback that it has poor elongation and stickiness, lacks in feeling in use, and lacks in transparency, resulting in poor bare skin feeling after makeup. Was.
これらの欠点を解決する手段として、特開昭58-41718号
公報には硫酸バリウムの粒径を大きくする方法が、また
特開昭62-174238号公報には硫酸バリウムの結晶形を板
状または針状とする方法が開示されている。しかし、こ
れらのいずれも合成後の熱処理、鉱酸処理を必要とする
ため製造工程が複雑であり、工業生産上好ましくない。
また、合成後の硫酸バリウムの形骸を完全に取り除くこ
とは困難で、板状構造の発達度合も不充分であるという
欠点をも有していた。As a means for solving these drawbacks, JP-A-58-41718 discloses a method of increasing the particle size of barium sulfate, and JP-A-62-174238 discloses a barium sulfate crystal form in the form of a plate or A needle-shaped method is disclosed. However, all of these require heat treatment after the synthesis and treatment with a mineral acid, which complicates the manufacturing process and is not preferable in industrial production.
Further, it is difficult to completely remove the skeleton of barium sulfate after the synthesis, and there is a drawback that the degree of development of the plate-like structure is insufficient.
斯かる実情において本発明者らは、上記課題を解決すべ
く鋭意研究を行った結果、その形状を板状構造とすれ
ば、使用感、透明性及び隠蔽性に優れた硫酸バリウムが
得られることを見出し、本発明を完成した。In such an actual situation, the present inventors have conducted earnest research to solve the above problems, and if the shape is a plate-like structure, barium sulfate excellent in usability, transparency and concealing property can be obtained. And completed the present invention.
すなわち、本発明は板状構造を呈し、そのアスペクト比
が５〜100であり、かつその板状面の周囲長の２乗と板
状面の正射影面の面積との比が20:1〜150:1であること
を特徴とする板状硫酸バリウム及びその製造方法を提供
するものである。That is, the present invention has a plate-like structure, has an aspect ratio of 5 to 100, and has a ratio of the square of the perimeter of the plate-like surface to the area of the orthographic surface of the plate-like surface is 20: 1 to. A plate-shaped barium sulfate having a 150: 1 ratio and a method for producing the same are provided.
本発明の硫酸バリウムは薄片状、薄板状、葉片状、花弁
状、雲母状、箔状等の板状構造を呈し、そのアスペクト
比（板状面の平均径／厚み）は５〜100であり、かつそ
の板状面の周囲長の２乗と板状面の正射影面の面積との
比は20:1〜150:1である。また、その形状は板状面に垂
直な１枚または２枚の鏡像面を有し、かつ縁部に凹部を
有するバタフライ形状である（第１図）。The barium sulfate of the present invention has a plate-like structure such as flaky, thin plate-shaped, leaf-shaped, petal-shaped, mica-shaped, and foil-shaped, and its aspect ratio (average diameter of plate-shaped surface / thickness) is 5 to 100. And the ratio of the square of the perimeter of the plate-like surface to the area of the orthographic plane of the plate-like surface is 20: 1 to 150: 1. Further, the shape thereof is a butterfly shape having one or two mirror image planes perpendicular to the plate-like surface and having a concave portion at the edge portion (Fig. 1).
板状硫酸バリウムのアスペクト比が５未満では摩擦係数
が大きくなるため使用感が悪くなり、また100を超える
ものは製造することが困難である。更に、その板状面の
周囲長の２乗の比率が前記の範囲未満では同様に摩擦係
数が大きくなるため使用感が悪くなり、また前記の範囲
を超えるものは製造することが困難である。If the aspect ratio of the plate-shaped barium sulfate is less than 5, the friction coefficient becomes large and the usability deteriorates, and if it exceeds 100, it is difficult to manufacture. Further, if the ratio of the square of the perimeter of the plate-like surface is less than the above range, the coefficient of friction is similarly increased, and the feeling of use deteriorates, and if the ratio exceeds the above range, it is difficult to manufacture.
また、本発明の板状硫酸バリウムはＸ線回折を行った場
合、結晶の（020）と（200）面の回折ピーク強度比が非
常に大きくなり（020）／（200）＝1.5〜100にも達する
（第３図）。Further, when the plate-shaped barium sulfate of the present invention is subjected to X-ray diffraction, the diffraction peak intensity ratio of the (020) and (200) planes of the crystal becomes very large and (020) / (200) = 1.5 to 100. Reaches (Fig. 3).
斯かる本発明の板状硫酸バリウムは、バリウム塩溶液と
硫酸塩溶液とを反応させることによって製造される。The tabular barium sulfate of the present invention is produced by reacting a barium salt solution with a sulfate solution.
本発明で用いるバリウム塩は水、アルコール等の溶媒に
可溶なものであり、例えば塩化バリウム、硝酸バリウ
ム、酢酸バリウム、水酸化バリウム等が挙げられる。そ
の純度は本発明の特徴である透明性を阻害しないため
に、バリウム以外の金属イオンが1000ppm以下であるこ
とが好ましい。The barium salt used in the present invention is soluble in a solvent such as water or alcohol, and examples thereof include barium chloride, barium nitrate, barium acetate and barium hydroxide. Since the purity does not impair the transparency, which is a feature of the present invention, metal ions other than barium are preferably 1000 ppm or less.
また、本発明において硫酸塩とは水、アルコール等の溶
媒に可溶な硫酸塩および硫酸を意味し、硫酸塩としては
例えば硫酸ナトリウム、硫酸アンモニウム等が挙げられ
るが、バリウム塩同様に透明性の観点から金属イオンを
含有しない硫酸塩溶液を用いることが好ましい。Further, in the present invention, the sulfate means water, a sulfate soluble in a solvent such as alcohol, and sulfuric acid, and examples of the sulfate include sodium sulfate, ammonium sulfate, etc. It is preferable to use a sulfate solution containing no metal ion.
これらのバリウム塩溶液のバリウムイオン濃度及び硫酸
塩溶液の硫酸イオン濃度は、反応前においてそれぞれ0.
001〜0.05mole/lであることが必要である。これらの濃
度が0.001mole/l未満では、結晶の板状構造が崩れて柱
状に近くなるため使用感が悪くなり、硫酸バリウムとし
ての収率も低くなるため産業上好ましくない。また0.05
mole/lを超えると結晶の板状構造が崩れて微粒状となる
ため使用感が悪くなるとともに光散乱効果が大きく、透
明性が劣り好ましくない。The barium ion concentration of these barium salt solutions and the sulfate ion concentration of the sulfate solutions were each 0.
It is necessary to be 001 to 0.05 mole / l. If the concentration of these is less than 0.001 mole / l, the plate-like structure of the crystal collapses and becomes closer to a columnar shape, resulting in poor usability and a low yield as barium sulfate, which is industrially undesirable. Also 0.05
If it exceeds mole / l, the plate-like structure of the crystal collapses to form fine particles, resulting in a poor usability and a large light scattering effect, which is not preferable because of poor transparency.
また、反応させる際、バリウム塩溶液と硫酸塩溶液はモ
ル比で1:10〜5:1となるように混合される。また反応
中、pHは1.0〜5.0となるように必要に応じて塩酸、硫
酸、硝酸等で調整され、反応温度は50〜100℃、好まし
くは60〜95℃である。pH及び反応温度がこの範囲をはず
れると結晶の板状構造が崩れ、使用感及び透明性が悪く
なる。In the reaction, the barium salt solution and the sulfate solution are mixed in a molar ratio of 1:10 to 5: 1. During the reaction, the pH is adjusted to 1.0 to 5.0 as necessary with hydrochloric acid, sulfuric acid, nitric acid, etc., and the reaction temperature is 50 to 100 ° C, preferably 60 to 95 ° C. If the pH and reaction temperature deviate from this range, the crystal plate-like structure will collapse, and the usability and transparency will deteriorate.
次いで本発明の実施例及び比較例を挙げて本発明を更に
説明する。Next, the present invention will be further described with reference to Examples and Comparative Examples of the present invention.
尚、本実施例及び比較例において使用感、透明性及び板
状構造の発達度合いの評価は下記の如くして行った。The feeling of use, the transparency, and the degree of development of the plate-shaped structure in the examples and comparative examples were evaluated as follows.
使用感 硫酸バリウム粉体1gを人口皮を張り付けた直径50mmφ、
厚み10mmの２枚の円盤の間に保持し、50gfの垂直荷重を
印加したまま片方の円盤を300rpmで回転させ、もう一方
の円盤でトクル（Ｆ）を検出し、粉体の摩擦係数（F/5
0）を算出して評価した。Feeling of use Barium sulphate powder 1g diameter 50mmφ with artificial skin attached,
It is held between two discs with a thickness of 10 mm, one disc is rotated at 300 rpm while a vertical load of 50 gf is applied, and the Tokule (F) is detected on the other disc, and the friction coefficient of the powder (F /Five
0) was calculated and evaluated.
透明性 分散媒としてシリコン油を選び、これに硫酸バリウム粉
体を40wt％加えて均一に混練し、アプリケーターによ
り、25μｍの薄膜をガラス板上に形成させ、これをヘイ
ズメーター（村上色彩技術研究所製、形式:HR−100）に
より、透過率を測定し評価した。Transparency Select silicon oil as the dispersion medium, add 40 wt% of barium sulfate powder to it, and knead it evenly to form a 25 μm thin film on the glass plate with an applicator. This haze meter (Murakami Color Research Laboratory) Manufactured, type: HR-100), and the transmittance was measured and evaluated.
板状構造の発達度合い 硫酸バリウム粉体1gをエタノール50cc中に分散し、次い
でガラス板上に厚さ約15μｍの薄膜を形成させ、乾燥し
た後、Ｘ線回折により硫酸バリウム血漿の（020）／（2
00）の回折ピークの強度比で評価した。Ｘ線回折は理学
電機製（形式:RAD-200）でCuKα線、40kV、80mVで行っ
た。Degree of development of plate-like structure 1 g of barium sulfate powder was dispersed in 50 cc of ethanol, then a thin film with a thickness of about 15 μm was formed on a glass plate, and after drying, X-ray diffraction analysis of barium sulfate plasma (020) / (2
The intensity ratio of the diffraction peak of (00) was used for evaluation. The X-ray diffraction was performed by Rigaku Denki (type: RAD-200) with CuKα ray, 40 kV, 80 mV.
実施例１ 特級塩化バリウム試薬1.974gと特級硫酸0.505gをイオン
交換水に1000gにそれぞれ溶解し、0.008mole/lのバリウ
ム溶液及び0.005mole/lの硫酸溶液とした。次に各溶液
を70℃に加温し、Ｕ字型攪拌バネを用い、回転数1000rp
mで攪拌した硫酸溶液にバリウム溶液を10分間で滴下
し、その後３分間攪拌を続け、反応を終了した。反応中
のpHは3.5であった。次いで常温まで冷却し、5Cの濾紙
で濾過して水洗後、105℃で２時間乾燥して硫酸バリウ
ムの粉末1.12gを得た。Example 1 1.974 g of special grade barium chloride reagent and 0.505 g of special grade sulfuric acid were dissolved in 1000 g of ion-exchanged water to prepare a 0.008 mole / l barium solution and a 0.005 mole / l sulfuric acid solution. Next, each solution was heated to 70 ° C, and a U-shaped stirrer was used to rotate at 1000 rpm.
The barium solution was added dropwise to the sulfuric acid solution stirred at m for 10 minutes, and then the stirring was continued for 3 minutes to complete the reaction. The pH during the reaction was 3.5. Then, the mixture was cooled to room temperature, filtered through a 5C filter paper, washed with water, and dried at 105 ° C. for 2 hours to obtain 1.12 g of barium sulfate powder.
得られた粉末は、板状面の平均径が5.3μｍで、アスペ
クト比が58で、板状面の周囲長の２乗と板状面の正射影
面の面積との比が88:1であった。また、Ｘ線回折におい
て、硫酸バリウム結晶の（020）と（200）面の回折ピー
ク比は5.3であり、バタフライ形状を呈しており、板状
構造がよく発達し、透明間が有り、滑りやすい粉体であ
った。The obtained powder has an average diameter of the plate-shaped surface of 5.3 μm, an aspect ratio of 58, and a ratio of the square of the perimeter of the plate-shaped surface to the area of the orthogonal projection surface of the plate-shaped surface is 88: 1. there were. Further, in X-ray diffraction, the diffraction peak ratio of the (020) and (200) planes of the barium sulfate crystal is 5.3, and it has a butterfly shape. The plate-like structure is well developed, there is a transparent gap, and it is slippery. It was a powder.
また、化粧料であるファンデーションに配合したとこ
ろ、従来のマイカ、タルク等の体質顔料を配合したもの
に較べて、使用感が良好であり、化粧膜の透明性も高か
った。In addition, when it was added to the foundation which is a cosmetic, the feeling of use was good and the transparency of the cosmetic film was high, compared with the conventional ones containing an extender pigment such as mica and talc.
実施例２ 特級酢酸バリウム試薬11.043gをイオン交換水2000gに溶
解し、0.02mole/lのバリウム溶液とした。また特級硫酸
ナトリウム2.926gをイオン交換水2000gに溶解し、0.02m
ole/lの硫酸溶液とした。次に各溶液を85℃に加温した
後、実施例１と同様にして硫酸バリウムの粉末6.53gを
得た。反応中のpHは2.31であった。Example 2 11.043 g of a special grade barium acetate reagent was dissolved in 2000 g of ion-exchanged water to prepare a 0.02 mole / l barium solution. Dissolve 2.926 g of special grade sodium sulfate in 2000 g of ion-exchanged water to obtain 0.02 m
An ole / l sulfuric acid solution was used. Next, each solution was heated to 85 ° C., and then, in the same manner as in Example 1, 6.53 g of powder of barium sulfate was obtained. The pH during the reaction was 2.31.
得られた粉末は、板状面の平均径が7.2μｍで、アスペ
クト比が68で、板状面の周囲長の２乗と板状面の正射影
面の面積との比が78:1であった。また、Ｘ線回折におい
て、硫酸バリウム結晶の（020）と（200）面の回折ピー
ク比は15.3であり、バタフライ形状を呈しており、板状
構造がよく発達し、透明感が有り、滑りやすい粉体であ
った。The powder obtained has an average diameter of the plate-like surface of 7.2 μm, an aspect ratio of 68, and a ratio of the square of the perimeter of the plate-like surface to the area of the orthographic surface of the plate-like surface is 78: 1. there were. Further, in X-ray diffraction, the diffraction peak ratio of the (020) and (200) planes of barium sulfate crystal is 15.3, and it has a butterfly shape, the plate-like structure is well developed, it has a transparent feeling, and it is slippery. It was a powder.
また、化粧料であるファンデーションに配合したとこ
ろ、従来のマイカ、タルク等の体質顔料を配合したもの
に較べて、使用感が良好であり、化粧膜の透明性も高か
った。In addition, when it was added to the foundation which is a cosmetic, the feeling of use was good and the transparency of the cosmetic film was high, compared with the conventional ones containing an extender pigment such as mica and talc.
実施例３ 特級酢酸バリウム試薬11.043gをイオン交換水2000gに溶
解し、0.02mole/lのバリウム溶液とした。また特級硫酸
ナトリウム2.926gをイオン交換水2000gに溶解し、0.02m
ole/lの硫酸ナトリウム溶液とした。次に各溶液を85℃
に加温した後、混合し、更に反応中のpHが3.0になるよ
うに濃塩酸5.3ccを加え、実施例１と同様して硫酸バリ
ウムの粉末6.53gを得た。Example 3 11.043 g of the special grade barium acetate reagent was dissolved in 2000 g of ion-exchanged water to prepare a 0.02 mole / l barium solution. Dissolve 2.926 g of special grade sodium sulfate in 2000 g of ion-exchanged water to obtain 0.02 m
An ole / l sodium sulfate solution was used. Next, each solution is 85 ℃
After heating, the mixture was mixed, and 5.3 cc of concentrated hydrochloric acid was added so that the pH during the reaction was 3.0, and 6.53 g of powder of barium sulfate was obtained in the same manner as in Example 1.
得られた粉末は、板状面の平均径が8.3μｍで、アスペ
クト比が77で、板状面の周囲長の２乗と板状面の正射影
面の面積との比が88:1であった。また、Ｘ線回折におい
て、硫酸バリウム結晶の（020）と（200）面の回折ピー
ク比は16.8であり、バタフライ形状を呈しており、板状
構造がよく発達し、透明感が有り、滑りやすい粉体であ
った。The obtained powder has an average diameter of the plate-like surface of 8.3 μm, an aspect ratio of 77, and a ratio of the square of the perimeter of the plate-like surface to the area of the orthographic plane of the plate-like surface is 88: 1. there were. Further, in X-ray diffraction, the diffraction peak ratio of the (020) and (200) planes of the barium sulfate crystal was 16.8, and it had a butterfly shape, with a well-developed plate-like structure, a transparent feeling, and slipperiness. It was a powder.
また、化粧料であるファンデーションに配合したとこ
ろ、従来のマイカ、タルク等の体質顔料を配合したもの
に較べて、使用感が良好であり、化粧膜の透明性も高か
った。In addition, when it was added to the foundation which is a cosmetic, the feeling of use was good and the transparency of the cosmetic film was high, compared with the conventional ones containing an extender pigment such as mica and talc.
比較例１ 特級塩化バリウム試薬24.675gと特級硫酸10.100gをイオ
ン交換水に1000gにそれぞれ溶解し、0.1mole/lのバリウ
ム溶液及び0.1mole/lの硫酸溶液とした。次に各溶液を3
0℃に加温し、実施例１と同様して硫酸バリウムの粉末1
9.5gを得た。Comparative Example 1 24.675 g of special grade barium chloride reagent and 10.100 g of special grade sulfuric acid were dissolved in 1000 g of ion-exchanged water to prepare 0.1 mol / l barium solution and 0.1 mol / l sulfuric acid solution. Then add each solution to 3
Warmed to 0 ° C. and treated with barium sulfate powder 1 as in Example 1.
9.5 g was obtained.
得られた粉末は、板状面の平均径が0.3μｍで、アスペ
クト比が1.5で、板状面の周囲長の２乗と板状面の正射
影面の面積との比が78:1であった。また、Ｘ線回折にお
いて、硫酸バリウム結晶の（020）と（200）面の回折ピ
ーク比は1.0であり、微粉末状を呈しており、板状構造
の発達は悪く、透明感も無く、滑り難い粉体であった。The powder obtained has an average diameter of the plate-like surface of 0.3 μm, an aspect ratio of 1.5, and the ratio of the square of the perimeter of the plate-like surface to the area of the orthographic plane of the plate-like surface is 78: 1. there were. Also, in X-ray diffraction, the diffraction peak ratio of the (020) and (200) planes of barium sulfate crystal was 1.0, and it was in the form of fine powder. It was a difficult powder.
比較例２ 特級塩化バリウム試薬24.675gと特級硫酸10.100gをイオ
ン交換水に1000gにそれぞれ溶解し、0.1mole/lのバリウ
ム溶液及び0.1mole/lの硫酸ナトリウム溶液とした。次
に各溶液を30℃に加温し、実施例１と同様して硫酸バリ
ウムの粉末19.5gを得た。反応中のpHは5.8であった。Comparative Example 2 24.675 g of the special grade barium chloride reagent and 10.100 g of the special grade sulfuric acid were dissolved in 1000 g of ion-exchanged water to prepare a 0.1 mol / l barium solution and a 0.1 mol / l sodium sulfate solution. Next, each solution was heated to 30 ° C., and in the same manner as in Example 1, 19.5 g of barium sulfate powder was obtained. The pH during the reaction was 5.8.
得られた粉末は、板状面の平均径が6.3μｍで、アスペ
クト比が3.5で、板状面の周囲長の２乗と板状面の正射
影面の面積との比が18:1であった。また、Ｘ線回折にお
いて、硫酸バリウム結晶の（020）と（200）面の回折ピ
ーク比は1:3であり、くずれた板状を呈しており、板状
構造の発達は悪く、透明感も無く、滑り難い粉体であっ
た。The powder obtained has an average diameter of the plate-like surface of 6.3 μm, an aspect ratio of 3.5, and a ratio of the square of the perimeter of the plate-like surface to the area of the orthographic plane of the plate-like surface is 18: 1. there were. In addition, in X-ray diffraction, the diffraction peak ratio of the (020) and (200) planes of barium sulfate crystal is 1: 3, exhibiting a distorted plate shape, the development of the plate structure is poor, and the transparent feeling is also present. It was a non-slip powder.
実施例４ バリウムイオン濃度が0.050mole/lの特級試薬塩化バリ
ウム溶液及び硫酸イオン濃度が0.050mole/lの硫酸溶液
を1:1のモル比で混合し、70℃にて反応させることによ
り、バタフライ形状を呈する板状硫酸バリウムを製造し
た。Example 4 A special-grade reagent having a barium ion concentration of 0.050 mole / l A barium chloride solution and a sulfuric acid solution having a sulfate ion concentration of 0.050 mole / l were mixed at a molar ratio of 1: 1 and reacted at 70 ° C. to give a butterfly. A plate-shaped barium sulfate having a shape was produced.
この板状硫酸バリウムについて平均粒径、（周囲長）2
／板状面正射影面の面積及びアスペクト比を測定した結
果を第１表に示す。また、使用感、透明性及び板状構造
の発達度合いを評価するために粉体摩擦係数、透明度及
びＸ線ピーク比を測定した結果も第１表に示す。Average particle size of this barium sulphate, (perimeter) 2
/ Table 1 shows the results of measuring the area and aspect ratio of the plate-shaped surface orthographic projection surface. Table 1 also shows the results of measuring the powder friction coefficient, the transparency and the X-ray peak ratio in order to evaluate the feeling of use, the transparency and the degree of development of the plate-like structure.
実施例５〜15、比較例３〜７ 下記第１表に示すバリウムイオン濃度、硫酸イオン濃
度、混合比及び反応温度にする以外は実施例１と同様に
してバタフライ形状を呈する板状硫酸バリウムを製造し
た。反応中のpHはいずれも2.1〜4.8の間であった。Examples 5 to 15 and Comparative Examples 3 to 7 A plate-shaped barium sulfate having a butterfly shape was prepared in the same manner as in Example 1 except that the barium ion concentration, the sulfate ion concentration, the mixing ratio and the reaction temperature shown in Table 1 below were used. Manufactured. The pH during the reaction was all between 2.1 and 4.8.
それぞれの板状硫酸バリウムについて平均粒径、（周囲
長）2／板状面正射影面の面積及びアスペクト比を測定
した結果を第１表に示す。また、使用感、透明性及び板
状構造の発達度合いを評価するために粉体摩擦係数、透
明度及びＸ線ピーク比を測定した結果も第１表に示す。Table 1 shows the results of measuring the average particle size, (peripheral length) 2 / area of the plate-shaped plane orthographic plane and aspect ratio of each plate-shaped barium sulfate. Table 1 also shows the results of measuring the powder friction coefficient, the transparency and the X-ray peak ratio in order to evaluate the feeling of use, the transparency and the degree of development of the plate-like structure.
第１表からあきらかな如く、実施例４〜14の板状硫酸バ
リウムは、比較例３〜７の板状硫酸バリウムに比べ、板
状構造が発達し、使用感及び透明性も優れている。 As is apparent from Table 1, the plate-like barium sulfates of Examples 4 to 14 have a plate-like structure developed, and are excellent in usability and transparency, as compared with the plate-like barium sulfates of Comparative Examples 3 to 7.
本発明の板状硫酸バリウムは板状構造を呈するために隠
蔽力に優れ、粉体の摩擦係数も格段に小さいため使用感
も良く、また透明性も良好なものである。The plate-shaped barium sulfate of the present invention has a plate-shaped structure and thus has excellent concealing power, and since the powder has a remarkably small coefficient of friction, it has a good feeling in use and has good transparency.
第１図は実施例６で得られた板状硫酸バリウムの結晶構
造の走査電子顕微鏡写真である。 第２図は比較例３の従来品硫酸バリウムの結晶構造の走
査電子顕微鏡写真である。 第３図は実施例６で得られた板状硫酸バリウムの（02
0）面の発達度合を表わすＸ線回折パターンを示図面で
ある。 第４図は比較例３の従来品硫酸バリウムの（020）面の
発達度合を表わすＸ線回折パターンを示す図面である。FIG. 1 is a scanning electron micrograph of the crystal structure of the plate-shaped barium sulfate obtained in Example 6. FIG. 2 is a scanning electron micrograph of the crystal structure of the conventional barium sulfate of Comparative Example 3. FIG. 3 shows (02) of the plate-shaped barium sulfate obtained in Example 6.
It is a drawing which shows the X-ray-diffraction pattern showing the development degree of 0) surface. FIG. 4 is an X-ray diffraction pattern showing the degree of development of the (020) plane of the conventional barium sulfate of Comparative Example 3.
Claims (2)
100であり、かつその板状面の周囲長の２乗と板状面の
正射影面の面積との比が20:1〜150:1であることを特徴
とする板状硫酸バリウム。1. A plate-like structure having an aspect ratio of 5 to 5.
A plate-shaped barium sulfate characterized in that the ratio is 100 and the ratio of the square of the perimeter of the plate-shaped surface to the area of the orthogonal projection surface of the plate-shaped surface is 20: 1 to 150: 1.
のバリウム塩溶液と硫酸イオン濃度が0.001〜0.05mole/
lの硫酸塩溶液とを1:10〜5:1のモル比で、pH1.0〜5.0、
50〜100℃にて反応させることを特徴とする請求項１記
載の板状硫酸バリウムの製造方法。2. The barium ion concentration is 0.001 to 0.05 mole / l.
Of barium salt solution and the concentration of sulfate ion is 0.001-0.05mole /
l sulfate solution at a molar ratio of 1:10 to 5: 1, pH 1.0 to 5.0,
The method for producing plate-shaped barium sulfate according to claim 1, wherein the reaction is performed at 50 to 100 ° C.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5564590A JPH0686292B2 (en) | 1990-03-07 | 1990-03-07 | Plate-shaped barium sulfate and method for producing the same |
| EP91103430A EP0445785B1 (en) | 1990-03-07 | 1991-03-06 | Plate-like barium sulfate and cosmetic composition |
| US07/665,583 US5171572A (en) | 1990-03-07 | 1991-03-06 | Barium sulfate and cosmetic compositions comprising same |
| DE69111852T DE69111852D1 (en) | 1990-03-07 | 1991-03-06 | Platelet-shaped barium sulfate and cosmetic composition. |
| US07/936,202 US5262148A (en) | 1990-03-07 | 1992-08-27 | Process for preparing barium sulfate |
| US08/098,819 US5340582A (en) | 1990-03-07 | 1993-07-29 | Barium sulfate cosmetic composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5564590A JPH0686292B2 (en) | 1990-03-07 | 1990-03-07 | Plate-shaped barium sulfate and method for producing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03257016A JPH03257016A (en) | 1991-11-15 |
| JPH0686292B2 true JPH0686292B2 (en) | 1994-11-02 |
Family
ID=13004556
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5564590A Expired - Lifetime JPH0686292B2 (en) | 1990-03-07 | 1990-03-07 | Plate-shaped barium sulfate and method for producing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0686292B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3067585B2 (en) | 1994-06-13 | 2000-07-17 | 堺化学工業株式会社 | Plate-like barium sulfate and its manufacturing method |
| JP4583147B2 (en) * | 2004-11-19 | 2010-11-17 | 三井金属鉱業株式会社 | Conductive composite powder and method for producing the same |
| US9040094B2 (en) | 2007-02-13 | 2015-05-26 | Sakai Chemical Industry Co., Ltd. | Flaky particle and cosmetic |
| EP2540670B1 (en) * | 2007-02-13 | 2016-11-23 | Sakai Chemical Industry Co., Ltd. | Process for preparing flaky particles coated with a fatty acid metal salt |
| JP6514859B2 (en) * | 2014-06-05 | 2019-05-15 | 株式会社ディーエイチシー | Makeup cosmetics |
-
1990
- 1990-03-07 JP JP5564590A patent/JPH0686292B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03257016A (en) | 1991-11-15 |
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