JPH0318928B2 - - Google Patents
Info
- Publication number
- JPH0318928B2 JPH0318928B2 JP57166003A JP16600382A JPH0318928B2 JP H0318928 B2 JPH0318928 B2 JP H0318928B2 JP 57166003 A JP57166003 A JP 57166003A JP 16600382 A JP16600382 A JP 16600382A JP H0318928 B2 JPH0318928 B2 JP H0318928B2
- Authority
- JP
- Japan
- Prior art keywords
- talc
- dispersant
- dispersion
- alkali metal
- aqueous dispersion
- 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
- 239000000454 talc Substances 0.000 claims description 29
- 229910052623 talc Inorganic materials 0.000 claims description 29
- 239000002270 dispersing agent Substances 0.000 claims description 17
- 229910052783 alkali metal Inorganic materials 0.000 claims description 11
- -1 alkali metal salt Chemical class 0.000 claims description 10
- ULUAUXLGCMPNKK-UHFFFAOYSA-N Sulfobutanedioic acid Chemical compound OC(=O)CC(C(O)=O)S(O)(=O)=O ULUAUXLGCMPNKK-UHFFFAOYSA-N 0.000 claims description 7
- 229920000388 Polyphosphate Polymers 0.000 claims description 6
- 229920000058 polyacrylate Polymers 0.000 claims description 6
- 239000001205 polyphosphate Substances 0.000 claims description 6
- 235000011176 polyphosphates Nutrition 0.000 claims description 6
- 239000006185 dispersion Substances 0.000 description 19
- 239000011248 coating agent Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- 125000004432 carbon atom Chemical group C* 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 239000005995 Aluminium silicate Substances 0.000 description 3
- 125000000217 alkyl group Chemical group 0.000 description 3
- 235000012211 aluminium silicate Nutrition 0.000 description 3
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 229920000137 polyphosphoric acid Polymers 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 description 1
- 235000019982 sodium hexametaphosphate Nutrition 0.000 description 1
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 description 1
- UNXRWKVEANCORM-UHFFFAOYSA-N triphosphoric acid Chemical compound OP(O)(=O)OP(O)(=O)OP(O)(O)=O UNXRWKVEANCORM-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K23/00—Use of substances as emulsifying, wetting, dispersing, or foam-producing agents
- C09K23/017—Mixtures of compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Emulsifying, Dispersing, Foam-Producing Or Wetting Agents (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Paints Or Removers (AREA)
- Paper (AREA)
Description
本発明はタルク（滑石）用分散剤に関し、詳し
くは、タルク含有率が高く、安定かつ低粘度のタ
ルクの水分散液を調製するための分散剤に関す
る。
タルク、カオリン（陶土）など無機物質を含む
水分散液は製紙、塗料、窯業、土木建築など広い
分野で使用されている。なかでもタルクの対分散
液は、紙の光沢や印刷適性など表面の性質を向上
させるために、コーテイング用樹脂類の水分散液
に添加されて紙に塗布される。この塗布はマシン
コーテイングで行われ、処理速度が速いために、
乾燥時間の短縮、塗付の容易さ、搬送費用の低減
などの面から、用いる塗工剤には高濃度かつ低粘
度で適度の流動性が要求されている。したがつ
て、タルクの水分散液についてもタルク含有量が
高く、しかも長期間安定で粘度の低い分散液が求
められている。
しかしながら、タルクは同じ紙塗工に用いられ
るカオリン、炭酸カルシウムなどの顔料とは異な
り、疎水性が大きいために水に対するぬれ性（湿
潤性）が悪い。従来からカオリン、炭酸カルシウ
ムなどの分散に用いられているポリアクリル酸ナ
トリウム、ヘキサメタリン酸ナトリウムなどの分
散剤を使用してタルクの水分散液を調製するに
は、特殊な装置を用いるか長時間の撹拌混合を要
し、しかも得られる水分散液の安定性は不十分で
あり、さらにタルク含量の多い場合には水分散液
の粘度が高くてポンプ輸送できないので取り扱い
にくいものである。
これまでタルク用分散剤として特開昭53−
102882号公報において硫酸化アルキルフエノール
エチレンオキシド付加物の塩が開示されている
が、タルクのぬれ性は改善されないし、タルク含
有率の高い水分散液の粘度は十分に低いとは言え
ない。
本発明者らはタルクの分散性を向上させる目的
で鋭意検討を行なつた結果、分散剤としてジアル
キルスルホコハク酸のアルカリ金属塩とポリリン
酸塩またはポリアクリル酸塩とを併用すると非常
に有効であることを見いだした。
ここに用いるジアルキルスルホコハク酸のアル
カリ金属塩のアルキル基は炭素原子数が５〜11の
ものがよく、特に分枝のあるアルキル基で炭素原
子数が８または９のものあるいはその混合物が好
ましい。アルキル基の炭素原子数が４以下の場合
にはぬれ性および分散性の改善効果が小さく、逆
に炭素原子数が12以上の場合には水に対する溶解
性が悪いために十分な分散効果が得られない。ア
ルカリ金属塩として用いるアルカリ金属にはリチ
ウム、ナトリウム、カリウムなどがあるが、ナト
リウムを用いるのが一般的である。
ポリリン酸塩としてはトリポリリン酸やヘキサ
メタリン酸などのポリリン酸のアルカリ金属塩が
使用され、またポリアクリル酸塩としてはポリア
クリル酸のアルカリ金属塩が使用されるが、この
場合もアルカリ金属塩としてはナトリウム塩の使
用が一般的である。
ジアルキルスルホコハク酸のアルカリ金属塩と
ポリリン酸塩またはポリアクリル酸塩との比は、
95：５〜50：50（重量比）が好ましい。
本発明における分散剤の使用量はタルクに対し
ジアルキルスルホコハク酸塩が0.08〜２重量％に
なるように用いるのが適している。0.08重量％未
満の使用ではタルクのぬれ性の改善が不十分であ
り、また分散剤としての効果が十分ではない。２
重量％を越えて使用しても分散効果の著しい増大
は認められず経済的に不利である。
本発明の分散剤は通常市販されている微粉状タ
ルクに対して有効であるが、特に平均粒径２〜
20μの超微粉状タルクについて大きな効果を発揮
する。得られる水分散液の性質をさらに改良する
ために、本発明の分散剤と共に種々の添加物を併
用することができる。たとえば、水分散液の泡立
ちを防止するためにシリコンオイルなどの消泡剤
を併用してもよい。
本発明の分散剤を用いることにより、タルク含
有率60重量％もの高濃度の水分散液を得ることが
でき、得られたタルクの水分散液は低粘度でかつ
長期間安定である。しかも、水分散液のポンプ移
送、コーテイング用樹脂類水分散液との混合など
の操作が容易であり、使用に際して非常に取り扱
いやすい。
次に本発明を実施例により説明する。
実施例 １
本発明のジアルキルスルホコハク酸のアルカリ
金属塩とポリリン酸塩またはポリアクリル酸塩と
を併用した分散剤、これらの単独、および公知の
分散剤を用いて、タルク含有率60重量％の超微分
状タルクの水分散液を調製した。所定量の分散剤
を水に溶解して200ｇとし、撹拌（300RPM）し
ながら超微粉状タルク300ｇを少量ずつ加えて、
加え終つた後さらに10分間撹拌を行なつて水分散
液を得た。その性状を表１に示す。タルクのぬれ
性の評価は、前述の分散剤水溶液の水面上に約
0.1ｇのタルクを静かに置いて、タルクが分散剤
水溶液中に沈降していく様子を観察して判定し
た。
ここに用いた本発明に用いるジアルキルスルホ
コハク酸のアルカリ金属塩は、常法により合成し
て得た各種のジアルキルスルホコハク酸塩であ
り、ポリリン酸塩およびポリアクリル酸塩は市販
品である。超微粉状タルクは粒径が20μ以下90
％、10μ以下58％、5μ以下26％の粒度分布をも
ち、平均粒径9μのものである。
表１より、本発明の分散剤を使用したものはぬ
れ性にすぐれるとともに、粒度が低くて流動性に
もすぐれていることがわかる。また、公知の分散
剤を使用したものは粘度が悪く、ペースト状であ
つた。
The present invention relates to a dispersant for talc (talc), and more particularly to a dispersant for preparing a stable and low-viscosity aqueous talc dispersion with a high talc content. Aqueous dispersions containing inorganic substances such as talc and kaolin (pottery clay) are used in a wide range of fields including paper manufacturing, paints, ceramics, and civil engineering and construction. Among these, a talc dispersion is added to an aqueous dispersion of a coating resin and applied to paper in order to improve surface properties such as gloss and printability of the paper. This application is done by machine coating, and because the processing speed is fast,
The coating agent used is required to have high concentration, low viscosity, and appropriate fluidity in order to shorten drying time, ease application, and reduce transportation costs. Therefore, there is a need for an aqueous talc dispersion that has a high talc content, is stable for a long period of time, and has a low viscosity. However, unlike pigments such as kaolin and calcium carbonate, which are also used in paper coating, talc is highly hydrophobic and has poor wettability with water. Preparing an aqueous talc dispersion using dispersants such as sodium polyacrylate and sodium hexametaphosphate, which have traditionally been used to disperse kaolin, calcium carbonate, etc., requires special equipment or a long period of time. Stirring and mixing are required, and the stability of the resulting aqueous dispersion is insufficient.Furthermore, when the talc content is high, the aqueous dispersion has a high viscosity and cannot be transported by pump, making it difficult to handle. Until now, it has been used as a dispersant for talc in JP-A-53-
102882 discloses a salt of a sulfated alkylphenol ethylene oxide adduct, but it does not improve the wettability of talc, and the viscosity of an aqueous dispersion containing a high talc content cannot be said to be sufficiently low. The inventors of the present invention have conducted intensive studies with the aim of improving the dispersibility of talc, and have found that it is extremely effective to use an alkali metal salt of dialkyl sulfosuccinic acid in combination with a polyphosphate or polyacrylate as a dispersant. I found out. The alkyl group of the alkali metal salt of dialkyl sulfosuccinic acid used herein preferably has 5 to 11 carbon atoms, particularly a branched alkyl group having 8 or 9 carbon atoms, or a mixture thereof. When the number of carbon atoms in the alkyl group is 4 or less, the effect of improving wettability and dispersibility is small, and conversely, when the number of carbon atoms is 12 or more, sufficient dispersion effect is not obtained due to poor solubility in water. I can't. Alkali metals used as alkali metal salts include lithium, sodium, potassium, etc., but sodium is generally used. As polyphosphates, alkali metal salts of polyphosphoric acid such as tripolyphosphoric acid and hexametaphosphoric acid are used, and as polyacrylates, alkali metal salts of polyacrylic acid are used, but in this case as well, the alkali metal salts are The use of sodium salts is common. The ratio of alkali metal salt of dialkylsulfosuccinic acid to polyphosphate or polyacrylate is:
95:5 to 50:50 (weight ratio) is preferred. The dispersant used in the present invention is suitably used in an amount of 0.08 to 2% by weight of dialkyl sulfosuccinate based on talc. When less than 0.08% by weight is used, the wettability of talc is insufficiently improved and the effect as a dispersant is insufficient. 2
Even if it is used in an amount exceeding 5% by weight, no significant increase in the dispersion effect is observed, which is economically disadvantageous. The dispersant of the present invention is effective against normally commercially available fine powdered talc, but especially with an average particle size of 2 to 2.
Great effect on 20μ ultra-fine powdered talc. In order to further improve the properties of the resulting aqueous dispersion, various additives can be used in conjunction with the dispersant of the invention. For example, an antifoaming agent such as silicone oil may be used in combination to prevent foaming of the aqueous dispersion. By using the dispersant of the present invention, an aqueous dispersion with a talc content as high as 60% by weight can be obtained, and the obtained aqueous talc dispersion has a low viscosity and is stable for a long period of time. In addition, operations such as pumping the aqueous dispersion and mixing with the coating resin aqueous dispersion are easy, and it is very easy to handle during use. Next, the present invention will be explained by examples. Example 1 Using a dispersant using a combination of the alkali metal salt of dialkyl sulfosuccinic acid and a polyphosphate or polyacrylate of the present invention, these alone, and a known dispersant, a talc content of more than 60% by weight was obtained. An aqueous dispersion of differentiated talc was prepared. Dissolve a predetermined amount of dispersant in water to make 200g, and add 300g of ultrafine powdered talc little by little while stirring (300RPM).
After the addition was completed, stirring was continued for another 10 minutes to obtain an aqueous dispersion. Its properties are shown in Table 1. To evaluate the wettability of talc, approx.
The determination was made by gently placing 0.1 g of talc and observing how the talc settled into the dispersant aqueous solution. The alkali metal salts of dialkyl sulfosuccinic acids used in the present invention used here are various dialkyl sulfosuccinates synthesized by conventional methods, and the polyphosphates and polyacrylates are commercially available products. Ultrafine powdered talc has a particle size of 20μ or less90
%, with a particle size distribution of 58% below 10μ and 26% below 5μ, with an average particle size of 9μ. From Table 1, it can be seen that the products using the dispersant of the present invention have excellent wettability, have a low particle size, and have excellent fluidity. Furthermore, those using known dispersants had poor viscosity and were paste-like.
【表】【table】
Claims (1)
とポリリン酸塩またはポリアクリル酸塩とからな
るタルク用分散剤。1. A dispersant for talc comprising an alkali metal salt of dialkyl sulfosuccinic acid and a polyphosphate or polyacrylate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57166003A JPS5955336A (en) | 1982-09-25 | 1982-09-25 | Dispersant for talc |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57166003A JPS5955336A (en) | 1982-09-25 | 1982-09-25 | Dispersant for talc |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5955336A JPS5955336A (en) | 1984-03-30 |
| JPH0318928B2 true JPH0318928B2 (en) | 1991-03-13 |
Family
ID=15823073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57166003A Granted JPS5955336A (en) | 1982-09-25 | 1982-09-25 | Dispersant for talc |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5955336A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4708154B2 (en) * | 2005-10-24 | 2011-06-22 | 花王株式会社 | Carbon black dispersant for rubber |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53102882A (en) * | 1977-02-14 | 1978-09-07 | Lankro Chem Ltd | Talc dispersion |
-
1982
- 1982-09-25 JP JP57166003A patent/JPS5955336A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53102882A (en) * | 1977-02-14 | 1978-09-07 | Lankro Chem Ltd | Talc dispersion |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5955336A (en) | 1984-03-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3152876B2 (en) | High concentration aqueous suspension of minerals and / or fillers and / or pigments | |
| JPH09176493A (en) | Stable water-based wax dispersion | |
| JPS62289698A (en) | Kaolin product | |
| JPH0820767A (en) | Method for preventing dusting | |
| US3702773A (en) | Alkanolamine stabilized high solids titanium dioxide slurry | |
| JPS5831211B2 (en) | Rapid dispersion method for aqueous suspensions | |
| US7341625B2 (en) | Method for the production of coated, fine-particle, inorganic solids and use thereof | |
| FI77464C (en) | Titanium dioxide slurry and its preparation process. | |
| JP2005314652A (en) | Aqueous colloidal gas black suspension, method for producing the same and use thereof | |
| US3597251A (en) | Calcium carbonate product | |
| JP2004515625A (en) | Aqueous suspension of cellulose ether, method for producing the same, and dry mixture | |
| JPH07505426A (en) | Stable CMC slurry | |
| US3322683A (en) | Aqueous barium carbonate dispersions, process for their production, and dry pre-mix | |
| JP2912380B2 (en) | Aqueous dispersion | |
| JPS6320567B2 (en) | ||
| JP3133117B2 (en) | Inorganic pigment slurry composition | |
| US3117883A (en) | Pigment for aqueous latex emulsion paints | |
| JPH03114526A (en) | Aqueous suspension of hydroxyethyl cellulose | |
| JPH0318928B2 (en) | ||
| FI96627C (en) | Pigment for paper coating | |
| JPS60200809A (en) | Water-containing stabilized composition of alkalinely controlled sodium dithionite | |
| NO792413L (en) | VERY FILLING SUSPENSION. | |
| JPH02115279A (en) | Production of aqueous carbon black dispersion of improved dispersibility | |
| EP0753029B1 (en) | Dispersing and grinding auxiliary for inorganic fillers and pigments, and use thereof | |
| US4089669A (en) | Soil neutralizing slurries |