JP3963513B2 - Aqueous polyalkylene oxide dispersion and process for producing the same - Google Patents
Aqueous polyalkylene oxide dispersion and process for producing the same Download PDFInfo
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- JP3963513B2 JP3963513B2 JP02599097A JP2599097A JP3963513B2 JP 3963513 B2 JP3963513 B2 JP 3963513B2 JP 02599097 A JP02599097 A JP 02599097A JP 2599097 A JP2599097 A JP 2599097A JP 3963513 B2 JP3963513 B2 JP 3963513B2
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/02—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques
- C08J3/03—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques in aqueous media
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L71/00—Compositions of polyethers obtained by reactions forming an ether link in the main chain; Compositions of derivatives of such polymers
- C08L71/02—Polyalkylene oxides
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2371/00—Characterised by the use of polyethers obtained by reactions forming an ether link in the main chain; Derivatives of such polymers
- C08J2371/02—Polyalkylene oxides
Description
【０００１】
【発明の属する技術分野】
本発明は、ポリアルキレンオキシド水性分散液およびその製造方法に関する。さらに詳しくは、製紙工程に用いる製紙用薬剤、排水処理用の凝集剤等として使用できる分散安定性に優れたポリアルキレンオキシド水性分散液に関するものである。
【０００２】
【従来の技術】
ポリアルキレンオキシドは、パルプ分散剤、繊維糊剤、凝集剤等の種々の用途に供される有用な水溶性高分子であり、これらの分野においては、一般に１ｐｐｍ〜１５％程度の水溶液として使用されることが多い。
【０００３】
しかし、ポリアルキレンオキシドは、一般に乾燥粉末品として市販されているので、使用時に粉末を水に溶かさなければならない。ポリアルキレンオキシドを水に溶解するに際しては、攪拌された水にポリアルキレンオキシドを少量ずつ添加し溶解していく。その際、ポリアルキレンオキシドそれ自身は溶解度がかなり大きいにもかかわらず、水との親和性が非常に強く、また、含水すると粘着性を有することから難溶性の固まり、いわゆる「ままこ」が生成し易く、短時間で均一な水溶液を得ることは非常に困難である。また、一旦生成した「ままこ」の表面には水和層が形成され固まりの中心部への水の拡散を妨げるため、生成した「ままこ」を溶解するのに溶解時間が大幅に長くなるとともに、操作や設備等の種々のトラブルの原因となる。
【０００４】
これを解決するために、特公昭５３−３２３７６号公報には、グリセリン等の有機溶剤を用いたポリアルキレンオキシドの油中水型サスペンジョンが開示されている。しかし、有機溶剤を使用する方法では、可燃性溶剤使用に関する設備対策が必要となり、また、溶剤は単なる分散剤であり、ポリアルキレンオキシド分散液使用後はそのまま排出されるため環境への負荷が大きくなる。また、有機溶剤自体が高価である等の問題があった。
【０００５】
また、特開平４−２６６９４５号公報には、安定剤としてキサンタンガムを含む濃厚ぎ酸ナトリウム溶液中の非イオンポリマーの流体サスペンジョンが開示されている。
しかしながら、これらのサスペンジョンは分散安定性に乏しく、サスペンジョンを調製してから短期間で固液分離し、液状組成物の流動性が失われてしまう等の問題があった。
【０００６】
【発明が解決しようとする課題】
上記の現状に鑑み、本発明は、長期にわたり優れた分散安定性、流動性を保つポリアルキレンオキシドの水性分散液およびその製造方法を提供することを目的とするものである。
【０００７】
【課題を解決するための手段】
本発明において上記課題を解決すべく鋭意検討した結果、ポリアルキレンオキシドを電解質水溶液中に分散させるに際し、分散安定剤として酸化アルミニウムを添加することにより、分散安定性に優れたポリアルキレンオキシドの水性分散液が得られることを見出し本発明を完成した。
即ち、本発明は、ポリアルキレンオキシドを電解質水溶液に分散したポリアルキレンオキシド水性分散液であって、分散安定剤として酸化アルミニウムを含むポリアルキレンオキシド水性分散液およびその製造方法に関する。
【０００８】
本発明において用いられるポリアルキレンオキシドとしては、特に限定されず、例えば、ポリエチレンオキシド、エチレンオキシド−プロピレンオキシド共重合体、エチレンオキシド−ブチレンオキシド共重合体、エチレンオキシド−スチレンオキシド共重合体、エチレンオキシド−シクロヘキセンオキシド共重合体、エチレンオキシド−エピクロルヒドリン共重合体等が挙げられる。なかでも、粘度平均分子量が５万〜１０００万のポリエチレンオキシド、エチレンオキシド−プロピレンオキシド共重合体が好ましく用いられる。
【０００９】
上記ポリアルキレンオキシドの粒子径については特に限定されないが、平均粒径が１５０μｍ以下の微粒子を用いると好結果が得られる。
上記ポリアルキレンオキシドの含有量は、分散液の全重量に対して１〜４０重量％が好ましい。上記ポリアルキレンオキシドの含有量が１重量％未満であると、本発明の効果が顕著にみられず、ポリアルキレンオキシドの含有量が４０重量％を超えると、均一な分散液を得ることができなくなる。より好ましくは１０〜３０重量％である。
【００１０】
本発明に用いる電解質としては、ポリマーの膨潤を最小にしてポリマーを不溶性にする電解質であれば特に限定されず、例えば、硫酸アンモニウム、リン酸アンモニウム等の無機アンモニウム塩等が挙げられる。なかでも、水に対する溶解度が大きい点で、硫酸アンモニウムが好適に用いられる。
上記電解質の濃度は、懸濁させるポリアルキレンオキシドの種類によって異なるが、通常、電解質／水の重量比が０．１１以上が好ましい。電解質／水の重量比が０．１１未満であると、ポリアルキレンオキシドが分散媒へ溶解するため安定なポリアルキレンオキシド水性分散液が得られない。より好ましくは電解質／水の重量比が０．４３〜０．８である。
【００１１】
本発明においては、ポリアルキレンオキシド水性分散液の分散安定剤として酸化アルミニウムを用いる。上記酸化アルミニウムの平均粒径は、１〜１０００ｎｍが好ましい。より好ましくは１０〜１００ｎｍの微粉末状の酸化アルミニウムである。
【００１２】
上記酸化アルミニウムの含有量は、電解質水溶液に対して固形分で通常０．１〜１１重量％が好ましく、より好ましくは０．３〜５．３重量％である。酸化アルミニウムの含有量が０．１重量％未満であると、分散効果が乏しく安定なポリアルキレンオキシド水性分散液が得られず、酸化アルミニウムの含有量が１１重量％を超えると、分散液の増粘が著しく流動性を損なうため好ましくない。
【００１３】
本発明においては、分散液の粘度を増加させたるために親水性のシリカ等の無機化合物又は水溶性高分子等を酸化アルミニウムに付加的に添加することもできる。また、使用目的に応じて、酸化防止剤、紫外線吸収剤等の添加剤を加えてもよい。
【００１４】
本発明のポリアルキレンオキシド水性分散液の製造方法について説明する。
（１）水に分散安定剤である酸化アルミニウムを攪拌しながら添加し、酸化アルミニウムの水分散液を調製する。
（２）この水分散液に電解質を溶解させることにより分散媒を製造する。
（３）得られた分散媒に、ポリアルキレンオキシドの粉末を少量ずつ攪拌しながら添加する。
上記の工程により、本発明のポリアルキレンオキシド水性分散液を得ることができる。
なお、酸化アルミニウム、電解質の添加順序は特に限定されないが、酸化アルミニウムのゾルを用いる場合には、電解質による酸化アルミニウムの凝集を防ぐために上記の順序が好ましい。
【００１５】
【実施例】
以下に本発明の実施例を掲げて更に詳しく説明するが、本発明はこれら実施例に限定されるものではない。
【００１６】
実施例１
２００ｍｌのビーカーに３５．１ｇの水を加え、攪拌機付きモーターを用いて攪拌しながら、１０．０ｇのアルミナゾル２００（平均粒径１０〜１００ｎｍ、固形分１０％のアルミナ分散水溶液、日産化学工業社製）を一括添加し、約５分間攪拌してアルミナゾルの均一分散液を得た。次に、この分散液に攪拌を継続しながら硫酸アンモニウム２９．９ｇを添加し、完全に溶解するまで充分に攪拌を行い分散媒を製造した。得られた分散媒に、ポリエチレンオキシド粉末（住友精化社製、ＰＥＯ−２７、粘度平均分子量７００万、平均粒径８０μｍ）２５．０ｇを攪拌しながら徐々に添加し、ポリエチレンオキシドが均一に分散するまで充分に攪拌し、ポリエチレンオキシドの水性分散液を得た。
得られたポリエチレンオキシド分散液は、適度な流動性を示し、６０日間室温で静置保存後も流動性が損なわれず、また相分離もみられなかった。
【００１７】
得られた分散液中のポリエチレンオキシドの経時安定性をみるために、一定期間毎に、分散液を水で希釈してポリエチレンオキシドの０．５重量％水溶液を調製し、水溶液粘度の経時変化をＢ型回転粘度計（回転数１２ｒｐｍ）を用いて測定した。その結果、６０日間分散液を室温で静置保存した後も初期の水溶液粘度を保っており、分散液中でポリエチレンオキシドが劣化せず安定に存在していることを確認した。結果を表１に示した。
【００１８】
実施例２〜９
表１に示した配合割合で実施例１と同様にしてポリアルキレンオキシド水性分散液を得た。得られた分散液の安定性をみるために水溶液粘度を測定し、結果を表１に示した。得られた分散液は、実施例１と同様に適度な流動性を示し、６０日間室温で静置保存後も流動性が損なわれず、相分離も見られなかった。また、分散液中のポリエチレンオキシドも実施例１と同様に安定であった。
【００１９】
表１中のＰＥＯは、ポリエチレンオキシド（ＰＥＯ−２７、住友精化社製、粘度平均分子量７００万、平均粒径８０μｍ）を表し、ＥＯ−ＰＯ共重合体は、エチレンオキシド−プロピレンオキシド共重合体を表す。
アルミニウムオキサイドＣは、酸化アルミニウム（平均粒径１３ｎｍ、固形分１００％、日本アエロジル社製）を表す。アルミナゾル１００は、酸化アルミニウム分散水溶液（平均粒径１０〜１００ｎｍ、固形分１０％、日産化学工業社製）を、アルミナゾル２００は、酸化アルミニウム分散水溶液（平均粒径１０〜１００ｎｍ、固形分１０％、日産化学工業社製）を、アルミナゾル５２０は、酸化アルミニウム分散水溶液（平均粒径１０〜２０ｎｍ、固形分２０％、日産化学工業社製）を表す。
トクシールＰは、酸化珪素（固形分１００％、トクヤマ社製）を表す。
【００２０】
比較例１
アルミナゾル２００を使用せず、水の添加量を４５．１ｇにしたこと以外は実施例１と同様にしてポリアルキレンオキシド水性分散液を得た。得られた分散液の静置安定性を表１に示した。
【００２１】
【表１】
【発明の効果】
本発明によれば、長期にわたり分散安定性に優れたポリアルキレンオキシド水性分散液が得られる。その結果、本発明のポリアルキレンオキシド水性分散液を水に少量添加するだけで、短時間で均一なポリアルキレンオキシド水溶液を得ることができる。また、取扱の点においても優れた効果を示すと同時に、溶解設備の縮小及び簡略化が期待できる。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an aqueous polyalkylene oxide dispersion and a method for producing the same. More specifically, the present invention relates to an aqueous polyalkylene oxide dispersion having excellent dispersion stability that can be used as a papermaking chemical used in a papermaking process, a flocculant for wastewater treatment, and the like.
[0002]
[Prior art]
Polyalkylene oxide is a useful water-soluble polymer for various uses such as pulp dispersants, fiber pastes, and flocculants. In these fields, it is generally used as an aqueous solution of about 1 ppm to 15%. Often.
[0003]
However, since polyalkylene oxide is generally marketed as a dry powder product, the powder must be dissolved in water at the time of use. When the polyalkylene oxide is dissolved in water, the polyalkylene oxide is gradually added to the stirred water and dissolved. At that time, although the polyalkylene oxide itself has a very high solubility, it has a very strong affinity with water, and when it contains water, it has a stickiness due to its stickiness, so-called “mako” is formed. It is very difficult to obtain a uniform aqueous solution in a short time. In addition, since the hydrated layer is formed on the surface of the once produced "Mamako" and prevents the water from diffusing into the center of the mass, the dissolution time is significantly increased to dissolve the produced "Mako". At the same time, it causes various troubles such as operation and equipment.
[0004]
In order to solve this problem, Japanese Patent Publication No. 53-32376 discloses a water-in-oil suspension of polyalkylene oxide using an organic solvent such as glycerin. However, in the method using organic solvent, it is necessary to take measures for the use of flammable solvent, and the solvent is just a dispersant and is discharged as it is after using the polyalkylene oxide dispersion, so the burden on the environment is large. Become. In addition, there is a problem that the organic solvent itself is expensive.
[0005]
JP-A-4-266945 discloses a fluid suspension of a nonionic polymer in a concentrated sodium formate solution containing xanthan gum as a stabilizer.
However, these suspensions have poor dispersion stability, and have problems such as solid-liquid separation in a short period of time after the suspension is prepared, resulting in loss of fluidity of the liquid composition.
[0006]
[Problems to be solved by the invention]
In view of the above-mentioned present situation, an object of the present invention is to provide an aqueous dispersion of polyalkylene oxide which maintains excellent dispersion stability and fluidity over a long period of time and a method for producing the same.
[0007]
[Means for Solving the Problems]
As a result of intensive investigations to solve the above-mentioned problems in the present invention, an aqueous dispersion of polyalkylene oxide having excellent dispersion stability can be obtained by adding aluminum oxide as a dispersion stabilizer when polyalkylene oxide is dispersed in an aqueous electrolyte solution. The present invention was completed by finding that a liquid was obtained.
That is, the present invention relates to an aqueous polyalkylene oxide dispersion in which polyalkylene oxide is dispersed in an aqueous electrolyte solution, and an aqueous polyalkylene oxide dispersion containing aluminum oxide as a dispersion stabilizer and a method for producing the same.
[0008]
The polyalkylene oxide used in the present invention is not particularly limited, and for example, polyethylene oxide, ethylene oxide-propylene oxide copolymer, ethylene oxide-butylene oxide copolymer, ethylene oxide-styrene oxide copolymer, ethylene oxide-cyclohexene oxide copolymer. Examples thereof include a polymer and an ethylene oxide-epichlorohydrin copolymer. Of these, polyethylene oxide and ethylene oxide-propylene oxide copolymers having a viscosity average molecular weight of 50,000 to 10,000,000 are preferably used.
[0009]
The particle size of the polyalkylene oxide is not particularly limited, but good results can be obtained by using fine particles having an average particle size of 150 μm or less.
The content of the polyalkylene oxide is preferably 1 to 40% by weight with respect to the total weight of the dispersion. When the polyalkylene oxide content is less than 1% by weight, the effect of the present invention is not significantly observed. When the polyalkylene oxide content exceeds 40% by weight, a uniform dispersion can be obtained. Disappear. More preferably, it is 10 to 30% by weight.
[0010]
The electrolyte used in the present invention is not particularly limited as long as it is an electrolyte that minimizes swelling of the polymer and makes the polymer insoluble, and examples thereof include inorganic ammonium salts such as ammonium sulfate and ammonium phosphate. Of these, ammonium sulfate is preferably used because of its high solubility in water.
The concentration of the electrolyte varies depending on the type of polyalkylene oxide to be suspended, but usually the electrolyte / water weight ratio is preferably 0.11 or more. If the weight ratio of electrolyte / water is less than 0.11, the polyalkylene oxide is dissolved in the dispersion medium, so that a stable aqueous polyalkylene oxide dispersion cannot be obtained. More preferably, the weight ratio of electrolyte / water is 0.43 to 0.8.
[0011]
In the present invention, aluminum oxide is used as a dispersion stabilizer for the aqueous polyalkylene oxide dispersion. The average particle diameter of the aluminum oxide is preferably 1-1000 nm. More preferably, it is aluminum oxide in the form of fine powder of 10 to 100 nm.
[0012]
The content of the aluminum oxide is usually preferably 0.1 to 11% by weight, more preferably 0.3 to 5.3% by weight in terms of solid content with respect to the aqueous electrolyte solution. When the aluminum oxide content is less than 0.1% by weight, the dispersion effect is poor and a stable polyalkylene oxide aqueous dispersion cannot be obtained. When the aluminum oxide content exceeds 11% by weight, the dispersion increases. Viscosity is not preferred because it significantly impairs fluidity.
[0013]
In the present invention, an inorganic compound such as hydrophilic silica or a water-soluble polymer can be additionally added to aluminum oxide in order to increase the viscosity of the dispersion. Moreover, you may add additives, such as antioxidant and a ultraviolet absorber, according to the intended purpose.
[0014]
The method for producing the aqueous polyalkylene oxide dispersion of the present invention will be described.
(1) Aluminum oxide as a dispersion stabilizer is added to water with stirring to prepare an aqueous dispersion of aluminum oxide.
(2) A dispersion medium is produced by dissolving an electrolyte in the aqueous dispersion.
(3) The polyalkylene oxide powder is added to the obtained dispersion medium little by little with stirring.
According to the above steps, the aqueous polyalkylene oxide dispersion of the present invention can be obtained.
The order of adding aluminum oxide and electrolyte is not particularly limited. However, when an aluminum oxide sol is used, the above order is preferable in order to prevent aggregation of aluminum oxide by the electrolyte.
[0015]
【Example】
Examples of the present invention will be described in detail below, but the present invention is not limited to these examples.
[0016]
Example 1
While adding 35.1 g of water to a 200 ml beaker and stirring using a motor equipped with a stirrer, 10.0 g of alumina sol 200 (alumina dispersion aqueous solution having an average particle size of 10 to 100 nm and a solid content of 10%, manufactured by Nissan Chemical Industries, Ltd.) ) Were added all at once and stirred for about 5 minutes to obtain a uniform dispersion of alumina sol. Next, 29.9 g of ammonium sulfate was added to the dispersion while continuing stirring, and the dispersion was sufficiently stirred until it was completely dissolved to produce a dispersion medium. To the obtained dispersion medium, 25.0 g of polyethylene oxide powder (Sumitomo Seika Co., Ltd., PEO-27, viscosity average molecular weight 7 million, average particle size 80 μm) is gradually added with stirring to uniformly disperse the polyethylene oxide. The mixture was sufficiently stirred until an aqueous dispersion of polyethylene oxide was obtained.
The obtained polyethylene oxide dispersion showed an appropriate fluidity, and the fluidity was not impaired after storage at room temperature for 60 days, and no phase separation was observed.
[0017]
In order to observe the temporal stability of polyethylene oxide in the obtained dispersion, a 0.5 wt% aqueous solution of polyethylene oxide was prepared by diluting the dispersion with water at regular intervals. It measured using the B-type rotational viscometer (rotation speed 12rpm). As a result, it was confirmed that the initial viscosity of the aqueous solution was maintained even after the dispersion was left to stand at room temperature for 60 days, and that polyethylene oxide was stably present in the dispersion without deterioration. The results are shown in Table 1.
[0018]
Examples 2-9
An aqueous polyalkylene oxide dispersion was obtained in the same manner as in Example 1 at the blending ratio shown in Table 1. In order to check the stability of the obtained dispersion, the viscosity of the aqueous solution was measured, and the results are shown in Table 1. The obtained dispersion showed appropriate fluidity as in Example 1, and fluidity was not impaired and phase separation was not observed even after standing at room temperature for 60 days. The polyethylene oxide in the dispersion was also stable as in Example 1.
[0019]
PEO in Table 1 represents polyethylene oxide (PEO-27, manufactured by Sumitomo Seika Co., Ltd., viscosity average molecular weight 7 million, average particle size 80 μm), and EO-PO copolymer is an ethylene oxide-propylene oxide copolymer. To express.
Aluminum oxide C represents aluminum oxide (average particle size 13 nm, solid content 100%, manufactured by Nippon Aerosil Co., Ltd.). The alumina sol 100 is an aluminum oxide dispersion aqueous solution (average particle size 10 to 100 nm, solid content 10%, manufactured by Nissan Chemical Industries), and the alumina sol 200 is an aluminum oxide dispersion aqueous solution (average particle size 10 to 100 nm, solid content 10%, Alumina sol 520 represents an aluminum oxide dispersed aqueous solution (average particle size 10 to 20 nm, solid content 20%, manufactured by Nissan Chemical Industries, Ltd.).
Toxeal P represents silicon oxide (solid content: 100%, manufactured by Tokuyama Corporation).
[0020]
Comparative Example 1
An aqueous polyalkylene oxide dispersion was obtained in the same manner as in Example 1 except that the alumina sol 200 was not used and the amount of water added was 45.1 g. Table 1 shows the stationary stability of the obtained dispersion.
[0021]
[Table 1]
【The invention's effect】
According to the present invention, an aqueous polyalkylene oxide dispersion having excellent dispersion stability over a long period of time can be obtained. As a result, a uniform polyalkylene oxide aqueous solution can be obtained in a short time by adding a small amount of the aqueous polyalkylene oxide dispersion of the present invention to water. In addition, it is possible to expect reduction and simplification of the melting equipment while at the same time showing excellent effects in terms of handling.
Claims (6)
（２）前記水分散液に、電解質として、硫酸アンモニウムおよびリン酸アンモニウムのうち少なくとも１種を溶解させる工程；
（３）酸化アルミニウムが分散した電解質溶液に、ポリアルキレンオキシドの粉末を添加する工程；
を含むことを特徴とするポリアルキレンオキシド水性分散液の製造方法。(1) A step of preparing an aqueous dispersion of aluminum oxide;
(2) A step of dissolving at least one of ammonium sulfate and ammonium phosphate as an electrolyte in the aqueous dispersion;
(3) adding a polyalkylene oxide powder to the electrolyte solution in which aluminum oxide is dispersed;
The manufacturing method of the polyalkylene oxide aqueous dispersion characterized by including this.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02599097A JP3963513B2 (en) | 1997-01-24 | 1997-01-24 | Aqueous polyalkylene oxide dispersion and process for producing the same |
| PCT/JP1998/000254 WO1998032785A1 (en) | 1997-01-24 | 1998-01-23 | Aqueous polyalkylene oxide dispersion and process for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02599097A JP3963513B2 (en) | 1997-01-24 | 1997-01-24 | Aqueous polyalkylene oxide dispersion and process for producing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10204183A JPH10204183A (en) | 1998-08-04 |
| JP3963513B2 true JP3963513B2 (en) | 2007-08-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP02599097A Expired - Fee Related JP3963513B2 (en) | 1997-01-24 | 1997-01-24 | Aqueous polyalkylene oxide dispersion and process for producing the same |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP3963513B2 (en) |
| WO (1) | WO1998032785A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2838862A4 (en) * | 2012-04-20 | 2016-05-11 | Grace W R & Co | Stabilized defoamers for cementitious compositions |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5109122B2 (en) * | 2007-02-28 | 2012-12-26 | 国立大学法人 千葉大学 | Fluid composition |
| JP6636451B2 (en) * | 2014-12-05 | 2020-01-29 | 住友精化株式会社 | Friction drag reducer and fire extinguisher |
| US20180282513A1 (en) * | 2015-12-17 | 2018-10-04 | Sumitomo Seika Chemicals Co., Ltd. | Polyalkylene oxide composition |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2805907B2 (en) * | 1978-02-13 | 1980-12-18 | Hoechst Ag, 6000 Frankfurt | Process for the production of a stable cellulose ether suspension and its use |
| JPS59213757A (en) * | 1983-05-18 | 1984-12-03 | Seitetsu Kagaku Co Ltd | Dissolution of highly polymerized polyethylene oxide and composition to be used for it |
| FI106559B (en) * | 1990-10-22 | 2001-02-28 | Aqualon Co | Sodium formate-containing fluidized polymer suspensions |
| JP2930511B2 (en) * | 1993-10-13 | 1999-08-03 | 日本製紙株式会社 | Aqueous polyolefin composition and method for producing the same |
-
1997
- 1997-01-24 JP JP02599097A patent/JP3963513B2/en not_active Expired - Fee Related
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1998
- 1998-01-23 WO PCT/JP1998/000254 patent/WO1998032785A1/en active Application Filing
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2838862A4 (en) * | 2012-04-20 | 2016-05-11 | Grace W R & Co | Stabilized defoamers for cementitious compositions |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH10204183A (en) | 1998-08-04 |
| WO1998032785A1 (en) | 1998-07-30 |
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