JPS597741B2 - Dispersant for Sachin White - Google Patents
Dispersant for Sachin WhiteInfo
- Publication number
- JPS597741B2 JPS597741B2 JP4626778A JP4626778A JPS597741B2 JP S597741 B2 JPS597741 B2 JP S597741B2 JP 4626778 A JP4626778 A JP 4626778A JP 4626778 A JP4626778 A JP 4626778A JP S597741 B2 JPS597741 B2 JP S597741B2
- Authority
- JP
- Japan
- Prior art keywords
- dispersant
- acid
- salt
- polymer
- sulfo group
- 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
Links
Description
【発明の詳細な説明】 本発明はサチンホワイト用分散剤に関する。[Detailed description of the invention] The present invention relates to a dispersant for sachin white.
更に詳しくはアクリル酸とスルホ基含有モノマーの重合
物の塩よりなるサチンホワイト用分散剤に関する。サチ
ンホワイトは水酸化カルシウム懸濁液と硫酸バンド溶液
とを反応させて得た３Ｃａ０−Ａｌ２Ｏ３・３ＣａＳ０
４・ ３１〜３２Ｈ２Ｏなる化学式を有するスルホアル
ミン酸カルシウムである。More specifically, the present invention relates to a dispersant for satin white comprising a salt of a polymer of acrylic acid and a sulfo group-containing monomer. Sachin white is 3Ca0-Al2O3.3CaS0 obtained by reacting calcium hydroxide suspension and sulfuric acid band solution.
4. Calcium sulfoaluminate having the chemical formula 31-32H2O.
従来より、サチンホワイトは塗被加工紙などの分野にお
いて紙の光沢、白度その他の品質においてすぐれた特長
を有し、塗被加工紙用の顔料として使用されている。Conventionally, Sachin White has been used as a pigment for coated processed paper, as it has excellent characteristics in terms of paper gloss, whiteness, and other qualities in the field of coated processed paper.
この場合、顔料粒子はその分散性がすぐれていることが
強く要求される。特に高速度のコーティングマシンで塗
工を行う場合、顔料の分散性が悪いと塗被液の見掛け粘
度が増大し、流動性が悪化するので良好な塗布がむずか
しくなり、また得られた塗被紙の印刷適性その他の塗被
紙の性質が悪くなるために目的を達することができない
。分散剤として塗被紙の性質、および経済性の点より少
量の添加で粘度が低下し、しかも高濃度の顔料分散液の
調製が可能なものが望まれる。従来、この目的の分散剤
として、ピロリン酸ソーダ、ヘキサメタリン酸ソーダ、
ポリアクリル酸ソーダ等が使用されている。サチンホワ
イトは複雑なアルカリ性顔料であり、一般的な形状とし
て７０〜７５％の水分を含む固いケーキ状のものである
たぬ、分散化が困難な顔料の１つとされてきた。In this case, it is strongly required that the pigment particles have excellent dispersibility. Particularly when coating is performed using a high-speed coating machine, if the dispersibility of the pigment is poor, the apparent viscosity of the coating liquid will increase and the fluidity will deteriorate, making it difficult to achieve good coating. The purpose cannot be achieved because the printability and other properties of the coated paper deteriorate. From the viewpoint of the properties of the coated paper and economic efficiency, it is desired that the dispersant be one that can reduce the viscosity even when added in a small amount and that can also prepare a highly concentrated pigment dispersion. Conventionally, as dispersants for this purpose, sodium pyrophosphate, sodium hexametaphosphate,
Sodium polyacrylate etc. are used. Sachin White is a complex alkaline pigment, typically in the form of a hard cake containing 70-75% water, and has been considered one of the most difficult pigments to disperse.
このものの分散剤としてピロリン酸ソーダ、ヘキサメタ
リン酸ソーダ、ポリアクリル酸ソーダ等が用いられてい
るが、十分な流動性を持たせるのに必要な分散剤の添加
量が多く、またハイシュア一での流動特性が著しく悪い
等の欠点を有している。サチンホワイトを塗被加工紙用
顔料として使用する場合、クレー（カオリン）等の顔料
と併用して製紙用塗被液（カラー）とされる。Sodium pyrophosphate, sodium hexametaphosphate, sodium polyacrylate, etc. are used as dispersants for this product, but the amount of dispersant required to provide sufficient fluidity is large, and the fluidity in High Sure It has drawbacks such as extremely poor characteristics. When Sachin White is used as a pigment for coated paper, it is used in combination with pigments such as clay (kaolin) to form a coating liquid (color) for papermaking.
この場合、顔料にサチンホワイトが含まれると顔料の分
散化がきわめて困難となり、カラーの粘度は増加し、又
流動特性も悪くなるため、従来の分散剤によつては必要
な流動性を持たせるには多量の分散剤を添加することを
要し、なおりラ一の流動特性が十分でない等の欠点を有
している。本発明者等はサチンホワイト用分散剤につい
て鋭意研究した結果、アクリル酸とスルホ基含有モノマ
ーを特定の割合で重合せしめて得られる重合物の塩が上
記の如き欠点がなく、すぐれた分散性を有することを見
出し、本発明を完成した。In this case, if the pigment contains satin white, it will be extremely difficult to disperse the pigment, the viscosity of the color will increase, and the flow properties will also deteriorate, so conventional dispersants cannot provide the necessary fluidity. This method requires the addition of a large amount of dispersant, and has disadvantages such as insufficient flow characteristics of the origami roller. As a result of intensive research into dispersants for Sachin White, the present inventors found that the polymer salt obtained by polymerizing acrylic acid and sulfo group-containing monomers in a specific ratio does not have the above-mentioned drawbacks and has excellent dispersibility. The present invention has been completed based on this discovery.
本発明で使用されるスルホ基含有モノマーとは、例えば
アリルスルホン酸、メタリルスルホン酸、２−アクリル
アミド−２−メチルプロパンスルホン酸、メタクリレー
トエチルスルホン酸、ビニルスルホン酸、又は夫々の塩
等のスルホ基を有する重合性モノマーである。本発明の
重合物は、重合物の平均分子量が５００〜２０，０００
の範囲であればどのような方法で合成しても特に性能上
、大きな差はみられない。合成法として、例えば次の様
な方法がある。すなわち、アクリル酸とスルホ基含有モ
ノマーとを、水媒体中、過硫酸塩の如き水溶性重合開始
剤を用いて重合せしめ、中和によリアルカリ金属塩また
はアンモニウム塩として目的物を得る合成法などである
。本発明において使用されるスルホ基含有モノマーの重
合物に係る重合に要するモノマーの配合割合は極めて特
徴的でありモル比（アクリル酸／スルホ基含有モノマー
）１００／５、１００／９０である。The sulfo group-containing monomer used in the present invention is, for example, a sulfo group-containing monomer such as allylsulfonic acid, methallylsulfonic acid, 2-acrylamido-2-methylpropanesulfonic acid, methacrylate ethylsulfonic acid, vinylsulfonic acid, or a salt thereof. It is a polymerizable monomer having a group. The polymer of the present invention has an average molecular weight of 500 to 20,000.
No matter which method is used for synthesis, there will be no significant difference in performance within this range. Examples of synthesis methods include the following methods. That is, a synthetic method in which acrylic acid and a sulfo group-containing monomer are polymerized in an aqueous medium using a water-soluble polymerization initiator such as a persulfate, and the desired product is obtained as a real alkali metal salt or ammonium salt by neutralization. It is. The mixing ratio of the monomers required for polymerization of the polymerized product of the sulfo group-containing monomer used in the present invention is very specific, and is a molar ratio (acrylic acid/sulfo group-containing monomer) of 100/5 and 100/90.
ここでスルホ基含有モノマーの配合割合が１００／５未
満では効果が不十分であり、１００／９０をこえる場合
はカラー系での分散効果がポリアクリル酸ソーダに比べ
著しく悪くなる。しかし、本発明の特徴的な範囲におい
ては、カラー系においてもポリアクリル酸ソーダ等にみ
られないすぐれた分散性を示すのである。また、本発明
の重合物の平均分子量は好ましくは５００〜２０，００
０の範囲、更に好ましくは１００〜１０，０００の範囲
である。これら重合物の塩としては、ナトリウム、カリ
ウムなどのアルカリ金属塩、又はアンモニウム塩が好ま
しいが、一部アルカリ土類金属の塩としてもよく、未中
和部分を残しておいても良い。このようにして得られた
重合物の塩よりなる本発明の分散剤はサチンホワイトに
対して、従来のポリアクリル酸ソーダやヘキサメタリン
酸ソーダなどの分散剤に比較して少量の添加量で効果が
あり、しかも流動特性が向上する等のすぐれた分散性を
発揮するものである。If the ratio of the sulfo group-containing monomer is less than 100/5, the effect will be insufficient, and if it exceeds 100/90, the dispersion effect in color systems will be significantly worse than that of sodium polyacrylate. However, within the characteristic range of the present invention, even in color systems, it exhibits excellent dispersibility that is not found in sodium polyacrylate and the like. Further, the average molecular weight of the polymer of the present invention is preferably 500 to 20,00.
0, more preferably 100 to 10,000. The salts of these polymers are preferably alkali metal salts such as sodium or potassium salts, or ammonium salts, but a portion of the salts may be alkaline earth metal salts, and an unneutralized portion may be left. The dispersant of the present invention, which is made of a salt of the polymer obtained in this way, is effective against satin white when added in a small amount compared to conventional dispersants such as sodium polyacrylate and sodium hexametaphosphate. Moreover, it exhibits excellent dispersibility such as improved flow characteristics.
以下に本発明を実施例について具体的に説明するが、本
発明はこれらの実施例に限定されるものではない。EXAMPLES The present invention will be specifically described below with reference to Examples, but the present invention is not limited to these Examples.
実施例 １
平均粒子径３Ｐ、針状のサチンホワイト水懸濁液に所定
量の分散剤を加えた後、ホモミキサー、ＴＫタイプ（特
殊機器（株）製）で５分間攪拌した後、得られたサチン
ホワイト水懸濁液を紙塗被用に応用した例を以下に示す
。Example 1 A predetermined amount of dispersant was added to an aqueous suspension of Sachin White with an average particle size of 3P and needles, and the mixture was stirred for 5 minutes using a homomixer, TK type (manufactured by Tokushu Kiki Co., Ltd.). An example of application of Sachin White water suspension to paper coating is shown below.
分散剤３重量部を添加したサチンホワイトのスラリーを
用い、カオリンとの併用系における製紙用塗被液（カラ
ー）を以下の配合割合で調製した。A papermaking coating liquid (color) in combination with kaolin was prepared using a slurry of Sachin White to which 3 parts by weight of a dispersant was added at the following blending ratio.
カラー配合得られたカラーの性質、分散剤の種類を第１
表に示す。Color formulation The properties of the resulting color and the type of dispersant are determined first.
Shown in the table.
第１表に示したカラーの内、ポリアクリル酸ソーダおよ
び本発明試料を分散剤として用いたカラーを上質紙表面
にコーテイングロツドを用いて手塗りし、室温乾燥後ス
ーパーカレンダー処理を行ない仕上げた。Among the colors shown in Table 1, colors using sodium polyacrylate and the sample of the present invention as dispersants were hand-painted onto the surface of high-quality paper using a coating rod, and after drying at room temperature, a super calender treatment was performed to finish. .
Claims (1)
られる重合物の塩よりなるサチンホワイト用分散剤。 ２ 重合物中のスルホ基含有モノマーの配合割合が、ア
クリル酸１００モルに対して５〜９０モルである特許請
求の範囲第１項記載の分散剤。 ３ 重合物の平均分子量が５００〜２０，０００である
特許請求の範囲第１項記載の分散剤。 ４ スルホ基含有モノマーがアリルスルホン酸、メタリ
ルスルホン酸、ビニルスルホン酸、２−アクリルアミド
−２−メチルプロパンスルホン酸、メタクリレートエチ
ルスルホン酸、またはそれらのアルカリ金属塩、アンモ
ニウム塩である特許請求の範囲第１項記載の分散剤。 ５ 重合物の塩がアルカリ金属塩、又はアンモニウム塩
である特許請求の範囲第１項記載の分散剤。[Scope of Claims] 1. A dispersant for Sachin White comprising a salt of a polymer obtained by reacting acrylic acid with a sulfo group-containing monomer. 2. The dispersant according to claim 1, wherein the proportion of the sulfo group-containing monomer in the polymer is 5 to 90 moles per 100 moles of acrylic acid. 3. The dispersant according to claim 1, wherein the average molecular weight of the polymer is 500 to 20,000. 4 Claims in which the sulfo group-containing monomer is allylsulfonic acid, methallylsulfonic acid, vinylsulfonic acid, 2-acrylamido-2-methylpropanesulfonic acid, methacrylate ethylsulfonic acid, or an alkali metal salt or ammonium salt thereof Dispersant according to item 1. 5. The dispersant according to claim 1, wherein the salt of the polymer is an alkali metal salt or an ammonium salt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4626778A JPS597741B2 (en) | 1978-04-19 | 1978-04-19 | Dispersant for Sachin White |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4626778A JPS597741B2 (en) | 1978-04-19 | 1978-04-19 | Dispersant for Sachin White |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS54138024A JPS54138024A (en) | 1979-10-26 |
| JPS597741B2 true JPS597741B2 (en) | 1984-02-20 |
Family
ID=12742434
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4626778A Expired JPS597741B2 (en) | 1978-04-19 | 1978-04-19 | Dispersant for Sachin White |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS597741B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60181167A (en) * | 1984-02-29 | 1985-09-14 | Sanyo Chem Ind Ltd | Dispersant for inorganic pigment |
| GB8421288D0 (en) * | 1984-08-22 | 1984-09-26 | Ici Plc | Filler |
-
1978
- 1978-04-19 JP JP4626778A patent/JPS597741B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS54138024A (en) | 1979-10-26 |
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