JP4382995B2 - Antifoam composition - Google Patents

Description

【０００７】
【化５】

【０００８】
【化６】

【０００９】
【発明の実施の形態】
本発明において（Ａ）成分である上記（１）式で示される化合物は、炭素数８〜１８のアルコール１モル当たりに、エチレンオキサイド、プロピレンオキサイド、ブチレンオキサイド等の炭素数２〜４のアルキレンオキサイドを１〜８０モル付加せしめて得られる化合物である。炭素数８〜１８のアルコールとしては、例えばオクチルアルコール、ラウリルアルコール、ミリスチルアルコール、パルミチルアルコール、ステアリルアルコール等の直鎖アルコールや側鎖を有する分岐アルコール等が挙げられるが、特にラウリルアルコールが好ましい。アルキレンオキサイドは、水酸化ナトリウム、水酸化カリウム等のアルカリ触媒の存在下で、アルコールに付加させることができる。
【００１０】
また（Ａ）成分の（２）式で示される化合物は、上記（１）式の化合物と炭素数１２〜１８の脂肪酸とのエステル化によって得られる化合物である。炭素数１２〜１８の脂肪酸としては、例えばラウリン酸、パルミチン酸、ステアリン酸、オレイン酸、リノール酸等が挙げられるが、特にパルミチン酸、ステアリン酸が好ましい。
【００１１】
上記（１）式、（２）式の化合物において、アルコールに付加せしめるアルキレンオキサイドとしては、上記エチレンオキサイド、プロピレンオキサイド、ブチレンオキサイドの１種又は２種以上を用いることができるが、アルキレンオキサイド成分中のエチレンオキサイド成分の占める割合が４０モル％以下であることが好ましい。従って、アルキレンオキサイドとしては、プロピレンオキサイド、ブチレンオキサイドの１種又は２種以上を用いるか、エチレンオキサイドの割合が４０モル％以下となるように、エチレンオキサイドをプロピレオキサイド及び／又はブチレンオキサイドと併用することが好ましい。２種以上のアルキレンオキサイドを付加させる場合、２種以上のアルキレンオキサイドを混合使用してランダム付加体としても良く、異なるアルキレンオキサイドを別々に付加させてブロック付加体としても良い。上記（１）式、（２）式の化合物において、アルキレンオキサイドの付加モル数（ｍの値）は５〜５０が好ましい。本発明の消泡剤組成物を構成する（Ａ）成分として、上記（１）式、（２）式で示される化合物のうちの１種又は２種以上の混合物が用いられる。
【００１２】
一方、（Ｂ）成分である上記（３）式で示される化合物は、炭素数１２〜１８の脂肪酸１モル当たり、アルキレンオキサイドを２０〜１００モル付加させた化合物である。炭素数１２〜１８の脂肪酸としては、上記（２）式の化合物を構成する脂肪酸と同様の脂肪酸を用いることができる。例えばラウリン酸、ステアリン酸、オレイン酸、リノール酸等が挙げられるが、特にパルミチン酸、ステアリン酸が好ましい。またアルキレンオキサイドとしては、エチレンオキサイド、プロピレンオキサイド、ブチレンオキサイド等の炭素数２〜４のアルキレンオキサイドの１種又は２種以上を用いることができるが、アルキレンオキサイド成分中のエチレンオキサイド成分の占める割合が５０モル％以下であることが好ましい。（３）式の化合物においても、異なる種類のアルキレンオキサイドが付加されている場合、アルキレンオキサイドはランダムに付加されていてもブロック状に付加されていても良い。本発明組成物における（Ｂ）成分としては、上記（３）式で示される化合物より選ばれた１種又は２種以上の混合物が用いられる。（３）式の化合物におけるアルキレンオキサイドの付加モル数（ｎの値）は４０〜６０が好ましい。
【００１３】
（Ｃ）成分のアニオン系界面活性剤としては、例えば脂肪酸石鹸、アルキルエーテルカルボン酸塩、アルキルベンゼンスルホン酸塩、アルキルナフタレンスルホン酸塩、ジアルキルスルホコハク酸エステル塩、アルキルスルホ酢酸塩、高級アルコール硫酸エステル、アルキルエーテル硫酸塩、アルキルエーテルリン酸エステル塩、アルキルリン酸エステル塩、ポリオキシエチレンアルキルフェニルエーテル硫酸塩等が用いられる。ここでいう塩とは、ナトリウム塩、カリウム塩、カルシウム塩、マグネシウム塩等である。これらの界面活性剤は１種又は２種以上を混合して用いることができる。
【００１４】
本発明の消泡剤組成物において、上記（Ａ）成分と（Ｂ）成分との割合は、重量比で（Ａ）：（Ｂ）＝５０：５０〜８０：２０であるが、好ましくは６０：４０〜７０：３０である。（Ａ）成分と（Ｂ）成分との割合が上記範囲から外れた場合、製品安定性が悪くなる。
【００１５】
また（Ｃ）成分のアニオン系界面活性剤は、（Ａ）成分と（Ｂ）成分の合計量に対して０．０５〜５重量％使用するが、特に０．１〜１重量％用いることが好ましい。（Ｃ）成分が（Ａ）成分と（Ｂ）成分の合計量に対して０．０５重量％未満の場合、製品安定性が低下し、５重量％を超えると性能低下の原因となる。
【００１６】
本発明の消泡剤組成物は、上記（Ａ）成分及び（Ｂ）成分が水に分散したエマルジョン型の消泡剤組成物であるが、エマルジョン中における（Ａ）成分、（Ｂ）成分、（Ｃ）成分の合計の含有率が５〜５０重量％であることが必要であり、好ましくは１５〜３０重量％含有することである。エマルジョン中における（Ａ）成分、（Ｂ）成分、（Ｃ）成分の合計の含有率が５重量％未満であると十分な性能が得られず、５０重量％を超えるとエマルジョンの粘度が高くなり作業性が低下する。
【００１７】
本発明の消泡剤組成物中には、必要により防腐剤や他の消泡成分（脂肪酸エステル、ジメチルシリコーン、高級アルコール等）等の各種添加剤を含有していても良い。
【００１８】
本発明の消泡剤組成物は、例えば（Ａ）、（Ｂ）、（Ｃ）成分を予め混合釜に投入し、撹拌下で所定量の水を添加してエマルジョン化することにより得ることができる。エマルジョン化する際に、市販の高圧ミキサー、ディスパーザー等の分散機を使用することもできる。
【００１９】
【実施例】
以下、実施例を挙げて本発明を更に詳細に説明する。
実施例１
（Ａ）成分としてラウリルアルコールにプロピレンオキサイド４０モル及びエチレンオキサイド１５モルをブロック付加した化合物（（１）式の化合物）３０重量部、及びオクチルアルコールのプロピレンオキサイド１０モル付加物４０重量部、（Ｂ）成分としてラウリン酸にエチレンオキサイド７モル、プロピレンオキサイド３４モル、エチレンオキサイド７モルをブロック状に付加した化合物（（３）式の化合物）２９重量部、（Ｃ）成分としてアルキルベンゼンスルホン酸ナトリウム１重量部を、水５６７重量部と混合撹拌し、エマルジョン型の消泡剤組成物を調製した。このエマルジョン中における（Ａ）成分と（Ｂ）成分の割合は、重量比で（Ａ）：（Ｂ）＝７０：３０、（Ａ）成分と（Ｂ）成分の合計量に対する（Ｃ）成分の割合は１．０１重量％であり、またエマルジョン中の、（Ａ）成分、（Ｂ）成分、（Ｃ）成分合計の含有率は１５重量％であった。
【００２０】
上記のように調製したエマルジョン型の消泡剤組成物の消泡性、エマルジョンの安定性及びエマルジョンを希釈した時の希釈液の安定性を以下のようにして試験した。
【００２１】
▲１▼消泡性
ガラス製の発泡管に下記組成の発泡試験水１０００ｍｌを入れ、３０℃及び５０℃に保持した。次いで発泡管下方に設けた水流ポンプにより発泡試験水を３０００ｍｌ／分の割合で循環させ、発泡管の上方９０ｃｍの高さから発泡試験水を落差５０ｃｍの試験水面に落下させて発泡させた。泡面が２０ｃｍの高さに達したら消泡剤組成物１０ｐｐｍ（対試験液）を循環経路途中に設けた注入口より添加し、泡面が最も低下するまでの時間と、その時の泡高さを測定した。また消泡剤を添加してから５分後、１０分後の泡高さも測定した。結果を表１に示す。
発泡試験水組成
ＳＰＮ−７７１（荒川化学） ０．０１部
ポリストロン１１７（荒川化学）０．３部
水道水 ９９．５部
【００２２】
▲２▼エマルジョンの安定性
５個のガラス瓶それぞれに、エマルジョンを１００ｍｌ入れて蓋をし、２５℃に調整した後、Ｂ型粘度計により粘度を測定した。ついで、エマルジョンを入れたガラス瓶を、０℃、５℃、２５℃、４０℃、６０℃に調整した恒温槽内でそれぞれ静置保持し、３ヶ月後にそれぞれの温度に保持しながらＢ型粘度計により粘度を測定した。また３ヶ月後のエマルジョンの状態を目視により以下の基準で評価した。結果を表２に示す。
○・・分離なし。
△・・製品全体の分離が１％未満。
×・・製品全体の分離が１％以上。
【００２３】
▲３▼希釈液の安定性
エマルジョンを水道水により５倍、５０倍、１００倍に希釈し、希釈液を調製した。各希釈液を、１００ｍｌずつガラス瓶に入れて５℃、２５℃、４０℃に保持した。その後、１日、７日、１４日、３０日経過後の製品の状態を目視観察して以下の基準で評価した。５倍希釈液の結果を表３に、５０倍希釈液の結果を表４に、１００倍希釈液の結果を表５にそれぞれ示す。
○・・分離なし。
△・・製品全体の分離が１％未満。
×・・製品全体の分離が１％以上。
【００２４】
【表１】

【００２５】
【表２】

【００２６】
【表３】

【００２７】
【表４】

【００２８】
【表５】

【００２９】
比較例１
（Ａ）成分と（Ｂ）成分の割合を、重量比で（Ａ）：（Ｂ）＝２０：８０、（Ａ）成分と（Ｂ）成分の合計量に対する（Ｃ）成分の割合を１重量％、エマルジョン中の、（Ａ）成分、（Ｂ）成分、（Ｃ）成分合計の含有率を１５重量％とした他は、実施例１と同様にしてエマルジョン型の消泡剤組成物を調製した。このエマルジョン型消泡剤の消泡性、エマルジョンの安定性及びエマルジョンを希釈した時の希釈液の安定性を実施例１と同様にして測定した。結果を表１〜５に示す。
【００３０】
実施例２
（Ａ）成分として、ラウリルアルコールにプロピレンオキシド４０モル、エチレンオキシド１０モルをブロック付加させた化合物とパルミチン酸とのエステル（（２）式の化合物）１２重量部、（Ｂ）成分としてヘプタデカン酸にエチレンオキシド２０モル、プロピレンオキシド５０モルをランダム付加させた化合物（（３）式の化合物）８重量部、（Ｃ）成分としてアルキルベンゼンスルフォン酸ナトリウム０．５重量部を、水７９．５重量部と混合し、実施例１と同様にしてエマルジョン型の消泡剤組成物を調製した。このエマルジョン中における（Ａ）成分と（Ｂ）成分の割合は、重量比で（Ａ）：（Ｂ）＝６０：４０、（Ａ）成分と（Ｂ）成分の合計量に対する（Ｃ）成分の割合は２．５重量％であり、またエマルジョン中の、（Ａ）成分、（Ｂ）成分、（Ｃ）成分合計の含有率は２０．５重量％であった。
【００３１】
このエマルジョン型消泡剤の消泡性、エマルジョンの安定性及びエマルジョンを希釈した時の希釈液の安定性を実施例１と同様にして測定した。結果を表１〜５に示す。
【００３２】
比較例２
（Ａ）成分と（Ｂ）成分の割合を、重量比で（Ａ）：（Ｂ）＝３０：７０、（Ａ）成分と（Ｂ）成分の合計量に対する（Ｃ）成分の割合を６重量％とした他は、実施例１と同様にしてエマルジョン型の消泡剤組成物を調製した。このエマルジョン型消泡剤の消泡性、エマルジョンの安定性及びエマルジョンを希釈した時の希釈液の安定性を同様にして測定した。結果を表１〜５に示す。
【００３３】
実施例３
（Ａ）成分としてミリスチルアルコールのプロピレンオキシド１０モル付加体（（１）式の化合物）１２重量部、及びステアリルアルコールのプロピレオキシド２０モル及びエチレンオキシド６モルブロック付加体と、ステアリン酸とのエステル（（２）式の化合物）９重量部、（Ｂ）成分としてノナデカン酸にエチレンオキシド１０モル、ブチレンオキシド４０モル、エチレンオキシド１０モルをブロック付加させた化合物（（３）式の化合物）９重量部、（Ｃ）成分としてアルキルベンゼンスルフォン酸ナトリウム０．３重量部を、水６９．７重量部と混合し、実施例１と同様にしてエマルジョン型の消泡剤組成物を調製した。このエマルジョン中における（Ａ）成分と（Ｂ）成分の割合は、重量比で（Ａ）：（Ｂ）＝７０：３０、（Ａ）成分と（Ｂ）成分の合計量に対する（Ｃ）成分の割合は１重量％であり、またエマルジョン中の、（Ａ）成分、（Ｂ）成分、（Ｃ）成分合計の含有率は３０．３重量％であった。
【００３４】
このエマルジョン型消泡剤の消泡性、エマルジョンの安定性及びエマルジョンを希釈した時の希釈液の安定性を同様にして測定した。結果を表１〜５に示す。
【００３５】
比較例３
（Ａ）成分と（Ｂ）成分の割合を、重量比で（Ａ）：（Ｂ）＝２０：８０、（Ａ）成分と（Ｂ）成分の合計量に対する（Ｃ）成分の割合を１重量％とした他は、実施例３と同様にしてエマルジョン型の消泡剤組成物を調製した。このエマルジョン中の（Ａ）成分、（Ｂ）成分、（Ｃ）成分合計の含有率は３０．３重量％であった。得られたエマルジョン型消泡剤の消泡性、エマルジョンの安定性及びエマルジョンを希釈した時の希釈液の安定性を同様にして測定した。結果を表１〜５に示す。
【００３６】
比較例４
エチレンオキシド１８モル、プロピレンオキシド３５モル、エチレンオキシド８モルのブロック重合体３０重量部と、７０重量部の水を混合しエマルジョン型の消泡剤を調整した。エマルジョン型消泡剤の消泡性、エマルジョンの安定性及びエマルジョンを希釈した時の希釈液の安定性を同様にして測定した。結果を表１〜５に示す。
【００３７】
【発明の効果】
以上説明したように本発明の消泡剤組成物は、使用環境の温度が変化しても安定な消泡性能を発揮するとともに、温度変化による粘度の変化が少ないため作業性性、エマルジョンの安定性に優れている。またエマルジョンを希釈した場合でも、希釈液の安定性が優れるため、実際の使用濃度に希釈しての保存も可能である等の効果を有する。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an antifoam composition.
[0002]
[Prior art and problems to be solved by the invention]
As a defoaming agent used when foaming occurs in various processes in various industries such as paper pulp manufacturing industry, paint manufacturing industry, dye manufacturing industry, textile processing industry, chemical industry, etc. Polyether antifoaming agents such as alkylene oxide adducts of mono- or polyhydric alcohols are widely used.
[0003]
A polyether antifoaming agent is generally used in the form of an emulsion because of its generally good dispersibility in water. However, the polyether antifoaming agent can be easily made into an emulsion, but there is a problem that the stability of the emulsion is low and the storage stability is poor. For this reason, there has been a problem that a complicated operation such as preparing a diluted solution of the emulsion every time it is used or stirring and holding the diluted solution is required. In addition, the emulsion of the polyether-based antifoaming agent has a problem that the viscosity is changed due to a change in temperature to affect workability, and the antifoaming performance is changed.
[0004]
The present invention has been made in view of the above points, and the emulsion is stable and can be stored for a long period of time. Stable defoaming performance can be obtained regardless of the temperature change from winter to summer. An object of the present invention is to provide a polyether-based emulsion-type antifoaming agent composition in which the viscosity change and separation of the emulsion are small, the stability of the diluent is excellent, and the work can be performed stably and efficiently. .
[0005]
[Means for Solving the Problems]
That is, the antifoam composition of the present invention comprises (A) at least one compound represented by the following formula (1) and formula (2), (B) at least one compound represented by the following formula (3), (C) An emulsion type antifoaming agent composition containing 5 to 50% by weight of anionic surfactants in total, wherein the ratio of the component (A) to the component (B) is (A) :( B) = 50: 50 to 80:20, and 0.05 to 5% by weight of component (C) is included with respect to the total amount of components (A) and (B).
[0006]
[Formula 4]

[0007]
[Chemical formula 5]

[0008]
[Chemical 6]

[0009]
DETAILED DESCRIPTION OF THE INVENTION
In the present invention, the compound represented by the above formula (1), which is the component (A), is an alkylene oxide having 2 to 4 carbon atoms such as ethylene oxide, propylene oxide, butylene oxide, etc. per mole of alcohol having 8 to 18 carbon atoms. Is a compound obtained by adding 1 to 80 mol of. Examples of the alcohol having 8 to 18 carbon atoms include linear alcohols such as octyl alcohol, lauryl alcohol, myristyl alcohol, palmityl alcohol, and stearyl alcohol, and branched alcohols having side chains. Lauryl alcohol is particularly preferable. The alkylene oxide can be added to the alcohol in the presence of an alkali catalyst such as sodium hydroxide or potassium hydroxide.
[0010]
The compound represented by the formula (2) of the component (A) is a compound obtained by esterification of the compound of the above formula (1) and a fatty acid having 12 to 18 carbon atoms. Examples of the fatty acid having 12 to 18 carbon atoms include lauric acid, palmitic acid, stearic acid, oleic acid, linoleic acid, and the like, but palmitic acid and stearic acid are particularly preferable.
[0011]
In the compounds of the above formulas (1) and (2), as the alkylene oxide to be added to the alcohol, one or more of the above ethylene oxide, propylene oxide and butylene oxide can be used. The proportion of the ethylene oxide component is preferably 40 mol% or less. Therefore, as alkylene oxide, one or more of propylene oxide and butylene oxide is used, or ethylene oxide is used in combination with propylene oxide and / or butylene oxide so that the proportion of ethylene oxide is 40 mol% or less. It is preferable to do. When two or more kinds of alkylene oxides are added, two or more kinds of alkylene oxides may be mixed and used as a random adduct, or different alkylene oxides may be added separately to form a block adduct. In the compounds of the above formulas (1) and (2), the number of added moles of alkylene oxide (value of m) is preferably 5-50. As the component (A) constituting the antifoam composition of the present invention, one or a mixture of two or more of the compounds represented by the above formulas (1) and (2) is used.
[0012]
On the other hand, the compound represented by the above formula (3) as the component (B) is a compound obtained by adding 20 to 100 mol of alkylene oxide per 1 mol of the fatty acid having 12 to 18 carbon atoms. As a C12-18 fatty acid, the fatty acid similar to the fatty acid which comprises the compound of said (2) Formula can be used. For example, lauric acid, stearic acid, oleic acid, linoleic acid and the like can be mentioned, but palmitic acid and stearic acid are particularly preferable. Further, as the alkylene oxide, one or two or more kinds of alkylene oxides having 2 to 4 carbon atoms such as ethylene oxide, propylene oxide, butylene oxide can be used, but the proportion of the ethylene oxide component in the alkylene oxide component is It is preferable that it is 50 mol% or less. Also in the compound of the formula (3), when different types of alkylene oxides are added, the alkylene oxides may be added randomly or in a block form. As the component (B) in the composition of the present invention, one or a mixture of two or more selected from the compound represented by the above formula (3) is used. (3) The added mole number (value of n) of the alkylene oxide in the compound of the formula is preferably 40-60.
[0013]
Examples of the anionic surfactant (C) include fatty acid soaps, alkyl ether carboxylates, alkylbenzene sulfonates, alkyl naphthalene sulfonates, dialkyl sulfosuccinate esters, alkyl sulfoacetates, higher alcohol sulfates, Alkyl ether sulfate, alkyl ether phosphate ester salt, alkyl phosphate ester salt, polyoxyethylene alkylphenyl ether sulfate and the like are used. The salt here refers to sodium salt, potassium salt, calcium salt, magnesium salt and the like. These surfactants can be used alone or in combination of two or more.
[0014]
In the antifoam composition of the present invention, the ratio of the component (A) to the component (B) is (A) :( B) = 50: 50 to 80:20 by weight ratio, preferably 60. : 40-70: 30. When the ratio of the component (A) and the component (B) is out of the above range, the product stability is deteriorated.
[0015]
The anionic surfactant (C) is used in an amount of 0.05 to 5% by weight, particularly 0.1 to 1% by weight, based on the total amount of the components (A) and (B). preferable. When the component (C) is less than 0.05% by weight with respect to the total amount of the component (A) and the component (B), the product stability is lowered, and when it exceeds 5% by weight, the performance is lowered.
[0016]
The antifoam composition of the present invention is an emulsion-type antifoam composition in which the component (A) and the component (B) are dispersed in water. The component (A), component (B) in the emulsion, It is necessary that the total content of component (C) is 5 to 50% by weight, preferably 15 to 30% by weight. If the total content of component (A), component (B) and component (C) in the emulsion is less than 5% by weight, sufficient performance cannot be obtained, and if it exceeds 50% by weight, the viscosity of the emulsion increases. Workability is reduced.
[0017]
The antifoaming composition of the present invention may contain various additives such as preservatives and other antifoaming components (fatty acid ester, dimethyl silicone, higher alcohol, etc.) as necessary.
[0018]
The antifoaming composition of the present invention can be obtained, for example, by adding the components (A), (B), and (C) to a mixing kettle in advance and adding a predetermined amount of water under stirring to emulsify. it can. When emulsifying, a dispersing machine such as a commercially available high-pressure mixer or disperser can also be used.
[0019]
【Example】
Hereinafter, the present invention will be described in more detail with reference to examples.
Example 1
(A) 30 parts by weight of a compound obtained by blocking addition of 40 mol of propylene oxide and 15 mol of ethylene oxide to lauryl alcohol (compound of formula (1)), and 40 parts by weight of an adduct of 10 mol of propylene oxide of octyl alcohol, (B) ) As a component, 7 parts of ethylene oxide, 34 moles of propylene oxide and 7 moles of ethylene oxide are added to lauric acid in a block form (compound of formula (3)) 29 parts by weight, and as component (C) 1 part of sodium alkylbenzenesulfonate Part was mixed and stirred with 567 parts by weight of water to prepare an emulsion type antifoaming agent composition. The ratio of the component (A) and the component (B) in this emulsion is (A) :( B) = 70: 30 by weight ratio, and the ratio of the component (C) to the total amount of the components (A) and (B). The ratio was 1.01% by weight, and the total content of component (A), component (B) and component (C) in the emulsion was 15% by weight.
[0020]
The emulsion-type antifoaming agent composition prepared as described above was tested for antifoaming properties, emulsion stability, and dilution stability when the emulsion was diluted as follows.
[0021]
{Circle around (1)} 1000 ml of foaming test water having the following composition was placed in a foaming tube made of antifoaming glass and kept at 30 ° C. and 50 ° C. Next, foaming test water was circulated at a rate of 3000 ml / min by a water pump provided below the foaming tube, and foaming test water was dropped from a height of 90 cm above the foaming tube onto the test water surface with a drop of 50 cm to cause foaming. When the foam surface reaches a height of 20 cm, 10 ppm of defoaming agent composition (vs. test solution) is added from the injection port provided in the middle of the circulation path, and the time until the foam surface is most lowered and the foam height at that time Was measured. The foam height was also measured 5 minutes after and 10 minutes after adding the antifoaming agent. The results are shown in Table 1.
Foam test water composition SPN-771 (Arakawa Chemical) 0.01 parts Polystron 117 (Arakawa Chemical) 0.3 parts Tap water 99.5 parts
{Circle around (2)} Stability of Emulsion 100 ml of the emulsion was put in each of the five glass bottles, the lid was adjusted to 25 ° C., and the viscosity was measured with a B-type viscometer. Next, the glass bottle containing the emulsion was kept stationary in a thermostat adjusted to 0 ° C., 5 ° C., 25 ° C., 40 ° C., and 60 ° C., and the B-type viscometer was kept at the respective temperatures after 3 months. The viscosity was measured by Further, the state of the emulsion after 3 months was visually evaluated according to the following criteria. The results are shown in Table 2.
○ ・ ・ No separation.
△ ・ The separation of the whole product is less than 1%.
× ·· Separation of the entire product is 1% or more.
[0023]
(3) Stability of diluted solution The diluted emulsion was prepared by diluting 5 times, 50 times and 100 times with tap water. 100 ml of each diluted solution was put in a glass bottle and kept at 5 ° C, 25 ° C and 40 ° C. Thereafter, the state of the product after 1 day, 7 days, 14 days, and 30 days elapsed was visually observed and evaluated according to the following criteria. Table 3 shows the results of the 5-fold diluted solution, Table 4 shows the results of the 50-fold diluted solution, and Table 5 shows the results of the 100-fold diluted solution.
○ ・ ・ No separation.
△ ・ The separation of the whole product is less than 1%.
× ·· Separation of the entire product is 1% or more.
[0024]
[Table 1]

[0025]
[Table 2]

[0026]
[Table 3]

[0027]
[Table 4]

[0028]
[Table 5]

[0029]
Comparative Example 1
The ratio of the component (A) to the component (B) is expressed as a weight ratio of (A) :( B) = 20: 80, and the ratio of the component (C) to the total amount of the components (A) and (B) is 1 weight. %. The emulsion type antifoaming composition was prepared in the same manner as in Example 1 except that the total content of the components (A), (B), and (C) in the emulsion was 15% by weight. did. The antifoaming property of this emulsion type antifoaming agent, the stability of the emulsion, and the stability of the diluted solution when the emulsion was diluted were measured in the same manner as in Example 1. The results are shown in Tables 1-5.
[0030]
Example 2
(A) Component: 12 parts by weight of an ester of palmitic acid and a compound obtained by blocking addition of 40 mol of propylene oxide and 10 mol of ethylene oxide to lauryl alcohol (compound of formula (2)), and ethylene oxide to heptadecanoic acid as component (B) 20 parts of a compound obtained by random addition of 20 moles of propylene oxide (compound of formula (3)) 8 parts by weight, and 0.5 parts by weight of sodium alkylbenzene sulfonate as a component (C) were mixed with 79.5 parts by weight of water. In the same manner as in Example 1, an emulsion type antifoaming agent composition was prepared. The ratio of the component (A) and the component (B) in this emulsion is (A) :( B) = 60: 40 by weight ratio, and the ratio of the component (C) to the total amount of the components (A) and (B). The ratio was 2.5% by weight, and the total content of component (A), component (B) and component (C) in the emulsion was 20.5% by weight.
[0031]
The antifoaming property of this emulsion type antifoaming agent, the stability of the emulsion, and the stability of the diluted solution when the emulsion was diluted were measured in the same manner as in Example 1. The results are shown in Tables 1-5.
[0032]
Comparative Example 2
The ratio of the component (A) to the component (B) is expressed as a weight ratio of (A) :( B) = 30: 70, and the ratio of the component (C) to the total amount of the components (A) and (B) is 6 wt. %. An emulsion type antifoaming composition was prepared in the same manner as in Example 1 except that the content was%. The antifoaming property of the emulsion type antifoaming agent, the stability of the emulsion, and the stability of the diluted solution when the emulsion was diluted were measured in the same manner. The results are shown in Tables 1-5.
[0033]
Example 3
(A) 12 parts by weight of propylene oxide adduct of myristyl alcohol (compound of formula (1)) as component, 20 mol of propylene oxide of stearyl alcohol and 6 mol of ethylene oxide block adduct, and an ester of stearic acid ( 9 parts by weight of the compound of the formula (2), 9 parts by weight of the compound (the compound of the formula (3)) obtained by blocking addition of 10 mol of ethylene oxide, 40 mol of butylene oxide and 10 mol of ethylene oxide to the nonadecanoic acid as the component (B) As component C), 0.3 part by weight of sodium alkylbenzene sulfonate was mixed with 69.7 parts by weight of water, and an emulsion type antifoaming composition was prepared in the same manner as in Example 1. The ratio of the component (A) and the component (B) in this emulsion is (A) :( B) = 70: 30 by weight ratio, and the ratio of the component (C) to the total amount of the components (A) and (B) The ratio was 1% by weight, and the total content of component (A), component (B) and component (C) in the emulsion was 30.3% by weight.
[0034]
The antifoaming property of the emulsion type antifoaming agent, the stability of the emulsion, and the stability of the diluted solution when the emulsion was diluted were measured in the same manner. The results are shown in Tables 1-5.
[0035]
Comparative Example 3
The ratio of the component (A) to the component (B) is expressed as a weight ratio of (A) :( B) = 20: 80, and the ratio of the component (C) to the total amount of the components (A) and (B) is 1 weight. %. An emulsion type antifoaming composition was prepared in the same manner as in Example 3 except that the content was%. The total content of component (A), component (B), and component (C) in this emulsion was 30.3% by weight. The antifoaming property of the obtained emulsion type antifoaming agent, the stability of the emulsion, and the stability of the diluted solution when the emulsion was diluted were measured in the same manner. The results are shown in Tables 1-5.
[0036]
Comparative Example 4
An emulsion type antifoaming agent was prepared by mixing 30 parts by weight of a block polymer of 18 moles of ethylene oxide, 35 moles of propylene oxide and 8 moles of ethylene oxide and 70 parts by weight of water. The antifoaming property of the emulsion type antifoaming agent, the stability of the emulsion, and the stability of the diluted solution when the emulsion was diluted were measured in the same manner. The results are shown in Tables 1-5.
[0037]
【The invention's effect】
As described above, the antifoaming composition of the present invention exhibits stable defoaming performance even when the temperature of the usage environment changes, and also has low workability and emulsion stability due to a small change in viscosity due to temperature change. Excellent in properties. In addition, even when the emulsion is diluted, the stability of the diluted solution is excellent, so that the emulsion can be stored after being diluted to an actual use concentration.

Claims (1)

(A) at least one compound represented by the following formula (1) and formula (2), (B) at least one compound represented by the following formula (3), and (C) an anionic surfactant in total The emulsion type antifoaming agent composition containing 5 to 50% by weight, wherein the ratio of the component (A) to the component (B) is (A) :( B) = 50: 50 to 80:20 by weight ratio. A defoamer composition comprising 0.05 to 5% by weight of component (C) with respect to the total amount of component (A) and component (B).