JP3659605B2 - Antifoam - Google Patents

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JP3659605B2
JP3659605B2 JP14041196A JP14041196A JP3659605B2 JP 3659605 B2 JP3659605 B2 JP 3659605B2 JP 14041196 A JP14041196 A JP 14041196A JP 14041196 A JP14041196 A JP 14041196A JP 3659605 B2 JP3659605 B2 JP 3659605B2
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group
acid residue
antifoaming agent
antifoaming
agent according
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JPH09313808A (en
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正敏 本間
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Adeka Corp
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Asahi Denka Kogyo KK
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Description

【0001】
【発明の属する技術分野】
本発明はエステル−アルキレンオキサイド系消泡剤に関するものであり、詳しくは特定のアルキレンオキサイド鎖を有することにより優れた自己乳化性を発揮する消泡剤に関するものである。
【0002】
【従来の技術】
従来から、製紙パルプ工業、塗料工業、繊維工業、合成樹脂工業、樹脂エマルジョン工業、コンクリート工業、食品工業等の製造工程や、屎尿処理、廃水処理等の水を多量に用いる製造・処理工程においては、発泡障害のために生産性、処理能力の低下が問題になっている。特に近年は、前記の工業分野の製造・処理工程に界面活性剤、分散剤、脱墨剤、サイズ剤、水溶性高分子等が多く用いられる傾向にあり、従来より発泡の防止は大きな問題になっている。
【0003】
このような発泡を防止するため、従来から様々な消泡剤が提案されている。特に近年は環境に対する負荷を軽減するため、エステル−アルキレンオキサイド系消泡剤が注目されている。
例えば、特開平3−68401号公報には、{RO(AO)}X(但し、Rはアルキル基、AOはオキシアルキレン鎖、Xはカルボン酸残基等)で表される消泡剤が提案されている。
又、特開平1−135510号公報には、RO(PO−EO)COR(但し、Rはアルキル基、アルケニル基、アリール基等、POはオキシプロピレン基、EOはオキシエチレン基)で表される消泡剤が提案されている。
特開昭61−178005号公報には、RCOO(AO)(SO)H(但し、Rは炭化水素基、AOはオキシアルキレン基、SOはオキシスチレン基)で表される消泡剤が提案されている。
特開昭56−169583号公報には、RO−EO−PO−EO−COR’(但し、Rはアルキル基、アルケニル基、EOはオキシエチレン基、POはオキシプロピレン基、R’は脂肪酸残基)で表される消泡剤が提案されている。
【0004】
【発明が解決しようとする課題】
しかし、これらの消泡剤は自己乳化性が良くないため、水系に添加しても均一に分散しにくく、そのため消泡効果が十分でなかった。このような自己乳化性が良くない消泡剤は、十分な消泡効果を発揮させるためには大量に添加する必要があるが、そのような手段も、廃水処理に負荷がかかることを考えると好ましい手段とはいえない。
【0005】
【課題を解決するための手段】
そこで発明者らは鋭意検討した結果、特定のオキシアルキレン基を有するエステル系消泡剤が消泡効果及び自己乳化性能に優れることを発見し、本発明を完成させるに至った。
すなわち、本発明は下記の一般式(1)
1O−(PO)m−(EO)n−(PO)p−COR2 (1)
(式中、R1及びR2は炭化水素基を表し、POはオキシプロピレン基を表し、EOはオキシエチレン基を表し、m、n及びpは1〜1,000なる数を表す)で表される化合物を含有する消泡剤を提供するものである。
【0006】
【発明の実施の形態】
一般式(1)において、R1は炭化水素基を表す。炭化水素基とは例えば、アルキル基、アルケニル基、アリール基、シクロアルキル基、シクロアルケニル基等である。
アルキル基としては例えば、メチル、エチル、プロピル、イソプロピル、ブチル、イソブチル、ターシャリブチル、ペンチル、イソペンチル、ネオペンチル、ターシャリペンチル、ヘキシル、ヘプチル、オクチル、2−エチルヘキシル、ノニル、デシル、ウンデシル、ドデシル、トリデシル、イソトリデシル、ミリスチル、パルミチル、ステアリル、イコシル、ドコシル、テトラコシル、トリアコンチル、2−オクチルドデシル、2−ドデシルヘキサデシル、2−テトラデシルオクタデシル、モノメチル分岐−イソステアリル等が挙げられる。
アルケニル基としては例えば、ビニル、アリル、プロペニル、イソプロペニル、ブテニル、イソブテニル、ペンテニル、イソペンテニル、ヘキセニル、ヘプテニル、オクテニル、ノネニル、デセニル、ウンデセニル、ドデセニル、テトラデセニル、オレイル等が挙げられる。
【0007】
アリール基としては例えば、フェニル、トルイル、キシリル、クメニル、メシチル、ベンジル、フェネチル、スチリル、シンナミル、ベンズヒドリル、トリチル、エチルフェニル、プロピルフェニル、ブチルフェニル、ペンチルフェニル、ヘキシルフェニル、ヘプチルフェニル、オクチルフェニル、ノニルフェニル、デシルフェニル、ウンデシルフェニル、ドデシルフェニル、スチレン化フェニル、p−クミルフェニル、α−ナフチル、β−ナフチル基等が挙げられる。
シクロアルキル基、シクロアルケニル基としては例えば、シクロペンチル、シクロヘキシル、シクロヘプチル、メチルシクロペンチル、メチルシクロヘキシル、メチルシクロヘプチル、シクロペンテニル、シクロヘキセニル、シクロヘプテニル、メチルシクロペンテニル、メチルシクロヘキセニル、メチルシクロヘプテニル基等が挙げられる。
これらの中でも、優れた消泡性及び自己乳化性を発揮させるためには炭素数8〜36のアルキル基、アルケニル基又はアリール基が好ましい。
【0008】
又、一般式(1)において、POはオキシプロピレン基を表し、EOはオキシエチレン基を表す。一般式(1)における(PO)m−(EO)n−(PO)p の部分はオキシプロピレン基及びオキシエチレン基のブロック重合で構成される。本発明の一般式(1)で表される消泡剤は、これらのオキシアルキレン基の選択及びブロック重合の順序により、優れた消泡性及び自己乳化性が発揮される。特に、従来のRO−(PO)−(EO)型又はRO−(EO)−(PO)−(EO)型のオキシアルキレン部を有する消泡剤に比べて自己乳化性の向上が顕著である。
【0009】
一般式(1)中、重合度m、n及びpは1〜1,000なる数を表す。中でも優れた消泡性及び自己乳化性を発揮させるためには、mは5〜300の範囲が好ましく、5〜100の範囲が更に好ましい。同様に、nは5〜300の範囲が好ましく、5〜100の範囲がより好ましい。更に、pは1〜100の範囲が好ましく、1〜50の範囲がより好ましい。又、PO/EOのモル比すなわち(m+p)/nは、10/1〜1/3の割合が好ましく、5/1〜1/2がより好ましい。
【0010】
又、一般式(1)において、R2は炭化水素基であり、前記に例示した炭化水素基のいずれであってもよいが、好ましくはカルボン酸残基である。ここでいうカルボン酸残基とは、R2―COOHで表されるカルボン酸のR2部分である。カルボン酸残基としては例えば、例えば、酢酸残基、プロピオン酸残基、酪酸残基、イソ酪酸残基、吉草酸残基、イソ吉草酸残基、ピバリン酸残基、カプロン酸残基、カプリル酸残基、カプリン酸残基、ラウリン酸残基、ミリスチン酸残基、パルミチン酸残基、ステアリン酸残基、アラキン酸残基、ベヘン酸残基、リグノセリン酸残基、アクリル酸残基、プロピオール酸残基、メタクリル酸残基、クロトン酸残基、ゾーマリン酸残基、オレイン酸残基、リノール酸残基、リノレン酸残基、ガドレン酸残基、エルカ酸残基、セラコレイン酸残基、ヒドロキシステアリン酸残基、リシノレイン酸残基、安息香酸残基、トルイル酸残基、ナフトエ酸残基、ケイ皮酸残基等が挙げられる。これらの中でも、カプリン酸残基、ラウリン酸残基、ミリスチン酸残基、パルミチン酸残基、ステアリン酸残基、オレイン酸残基等が好ましい。
又、一般式(1)で表される化合物の分子量は500〜5,000が好ましく、1,000〜2,500がより好ましい。
【0011】
本発明の消泡剤は、公知の消泡剤、例えば鉱油、植物油、脂肪族アルコール、脂肪酸、又は高級アルコール、脂肪酸、アルキルフェノール等のアルキレンオキサイド付加物等と併用して使用してもよい。
本発明の消泡剤の添加量は、添加する系の発泡状態等に応じて適宜設定すればよいが、通常、系に対して0.1〜20重量%程度添加すればよい。本発明の消泡剤は自己乳化性に優れるため、従来の消泡剤より有効添加量の範囲が広い。
本発明の消泡剤の用途は特に限定されない。例えば製紙パルプ工業、塗料工業、繊維工業、合成樹脂工業、樹脂エマルジョン工業、コンクリート工業、食品工業、屎尿処理、廃水処理等の水を多量に用いる製造・処理工程等、発泡障害が問題になる全ての製造・処理工程に使用することができる。
【0012】
【実施例】
以下、本発明を実施例により更に具体的に説明する。
以下の製造例により、本発明の消泡剤を製造した。
(合成例1)
ステアリルアルコール150g及び触媒としてKOH2.1gを3リットルのオートクレーブに仕込み、窒素ガスにて置換した。次いで、プロピレンオキサイド(以下、PO)321.9gをフィードして、100〜150℃、1.0〜7.0kg/cm2にて2時間付加反応を行なった。その後、エチレンオキサイド(以下、EO)439.5gを温度及び圧力は同条件で、3時間付加反応を行なった。更に、PO 128.6gを温度及び圧力は同条件で、1時間付加反応を行なった後、3時間熟成させた。その後、リン酸にて触媒を中和し、真空脱水を行なった。
次いで、撹拌機、還流冷却器及び温度計を備えた4つ口フラスコに、上記の条件で合成した中間体1000g、ステアリン酸156.6g及び触媒としてNaOH6gを仕込み、窒素ガスで置換した後、80〜150℃、常圧にて3時間エステル化反応を行なった。反応終了後、NaOHで中和し、脱水して本発明の消泡剤1を得た。
【0013】
(合成例2)
ラウリルアルコール110g及び触媒としてKOH2.1gを3リットルのオートクレーブに仕込み、窒素ガスにて置換した。次いで、PO 617.0gをフィードして、100〜150℃、1.0〜7.0kg/cm2にて4時間付加反応を行なった。その後、EO 468.1gを温度及び圧力は同条件で、4時間付加反応を行なった。更に、PO 78.0gを温度及び圧力は同条件で、1時間付加反応を行なった後、3時間熟成させた。その後、リン酸にて触媒を中和し、真空脱水を行なった。
次いで、撹拌機、還流冷却器及び温度計を備えた4つ口フラスコに、上記の条件で合成した中間体1000g、ラウリン酸91g及び触媒としてNaOH6gを仕込み、窒素ガスで置換した後、80〜150℃、常圧にて3時間エステル化反応を行なった。反応終了後、NaOHで中和し、脱水して本発明の消泡剤2を得た。
【0014】
以下、同様の方法にて、本発明の消泡剤3〜6を得た。
以下の実施例1及び2にて使用した消泡剤は以下のとおりである。
消泡剤1…C1837O(PO)10(EO)18(PO)4COC1735
消泡剤2…C1225O(PO)18(EO)18(PO)3COC1123
消泡剤3…RO(PO)7(EO)18(PO)7COC1123
(RはC18、C20、C22の混合物)
消泡剤4…C817O(PO)10(EO)18(PO)4COC1123
消泡剤5…RO(PO)12(EO)18(PO)7COC1733
(Rは分枝C24
消泡剤6…RO(PO)7(EO)18(PO)7COC1735
(Rは分枝C8
比較品1…C1633O(PO)22(EO)8COC1123
比較品2…C1633O(PO)22(EO)8
比較品3…C1837O(EO)3(PO)35(EO)3COC1735
比較品4…C1835O(AO)31COC1123
(AOは、EO/POモル比=1/1のランダム付加物)
比較品5…C1837O(PO)10(EO)18(PO)4
【0015】
(実施例1)
以下の方法により消泡性試験を行なった。
試験方法:水に、ロジン系サイズ剤、脱墨剤及び粘剤を配合した発泡液200mlを、底部に木下式ボールフィルターを設置した1リットルのメスシリンダーに秤量し、ボールフィルターを通じて4.0リットル/分で通気を行い、1,000mlの標線まで発泡させた。次いで、水にて200倍に希釈した本発明の消泡剤1〜6及び比較品1〜5を有り姿で5ppm添加した。その後、同様の通気を5分間継続し、泡容量の変化を測定した。結果を表1に示す。但し、泡容量=全量−200mlとする。
【0016】
【表1】

Figure 0003659605
【0017】
(実施例2)
以下の方法により乳化安定性試験を行なった。
試験方法:ガラス瓶に、本発明の消泡剤1〜6及び比較品1〜5を秤取し、25℃の水道水にて10倍及び200倍に希釈し、30秒間震盪して室温にて24時間放置後、乳化安定性を目視にて評価した。結果を表2に以下に示す。
【0018】
【表2】
Figure 0003659605
【0019】
【発明の効果】
本発明は上記のように構成したので、自己乳化性に優れ、かつ少量で高い消泡効果を示す消泡剤を提供することができる。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an ester-alkylene oxide-based antifoaming agent, and more particularly to an antifoaming agent that exhibits excellent self-emulsifying properties by having a specific alkylene oxide chain.
[0002]
[Prior art]
Conventionally, in manufacturing processes such as paper and pulp industry, paint industry, textile industry, synthetic resin industry, resin emulsion industry, concrete industry, food industry, etc. Due to foaming obstacles, productivity and processing capacity declines. Particularly in recent years, surfactants, dispersants, deinking agents, sizing agents, water-soluble polymers, etc. tend to be frequently used in the manufacturing and treatment processes in the industrial field, and the prevention of foaming has been a major problem than before. It has become.
[0003]
In order to prevent such foaming, various antifoaming agents have been conventionally proposed. Particularly in recent years, an ester-alkylene oxide antifoaming agent has attracted attention in order to reduce the burden on the environment.
For example, JP-A-3-68401 proposes an antifoaming agent represented by {RO (AO)} X (where R is an alkyl group, AO is an oxyalkylene chain, X is a carboxylic acid residue, etc.). Has been.
JP-A-1-135510 discloses RO (PO-EO) COR (where R is an alkyl group, alkenyl group, aryl group, etc., PO is an oxypropylene group, and EO is an oxyethylene group). Antifoam agents have been proposed.
JP-A-61-178005 proposes an antifoaming agent represented by RCOO (AO) (SO) H (where R is a hydrocarbon group, AO is an oxyalkylene group, and SO is an oxystyrene group). ing.
JP-A-56-169583 discloses RO-EO-PO-EO-COR '(where R is an alkyl group, alkenyl group, EO is an oxyethylene group, PO is an oxypropylene group, and R' is a fatty acid residue. ) Has been proposed.
[0004]
[Problems to be solved by the invention]
However, since these antifoaming agents are not good in self-emulsifying properties, even when added to an aqueous system, they are difficult to disperse uniformly, so that the defoaming effect is not sufficient. Such an antifoaming agent having poor self-emulsifying property needs to be added in a large amount in order to exert a sufficient antifoaming effect, but considering that such means also imposes a load on wastewater treatment. It is not a preferable means.
[0005]
[Means for Solving the Problems]
Thus, as a result of intensive studies, the inventors discovered that an ester-based antifoaming agent having a specific oxyalkylene group is excellent in antifoaming effect and self-emulsifying performance, and completed the present invention.
That is, the present invention provides the following general formula (1)
R 1 O- (PO) m- ( EO) n- (PO) p-COR 2 (1)
(Wherein R 1 and R 2 represent a hydrocarbon group, PO represents an oxypropylene group, EO represents an oxyethylene group, and m, n, and p represent a number of 1 to 1,000). An antifoaming agent containing the compound to be produced is provided.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
In the general formula (1), R 1 represents a hydrocarbon group. Examples of the hydrocarbon group include an alkyl group, an alkenyl group, an aryl group, a cycloalkyl group, and a cycloalkenyl group.
Examples of the alkyl group include methyl, ethyl, propyl, isopropyl, butyl, isobutyl, tertiary butyl, pentyl, isopentyl, neopentyl, tertiary pentyl, hexyl, heptyl, octyl, 2-ethylhexyl, nonyl, decyl, undecyl, dodecyl, Examples include tridecyl, isotridecyl, myristyl, palmityl, stearyl, icosyl, docosyl, tetracosyl, triacontyl, 2-octyldodecyl, 2-dodecylhexadecyl, 2-tetradecyloctadecyl, monomethyl branched-isostearyl and the like.
Examples of the alkenyl group include vinyl, allyl, propenyl, isopropenyl, butenyl, isobutenyl, pentenyl, isopentenyl, hexenyl, heptenyl, octenyl, nonenyl, decenyl, undecenyl, dodecenyl, tetradecenyl, oleyl and the like.
[0007]
Examples of the aryl group include phenyl, toluyl, xylyl, cumenyl, mesityl, benzyl, phenethyl, styryl, cinnamyl, benzhydryl, trityl, ethylphenyl, propylphenyl, butylphenyl, pentylphenyl, hexylphenyl, heptylphenyl, octylphenyl, nonyl Examples include phenyl, decylphenyl, undecylphenyl, dodecylphenyl, styrenated phenyl, p-cumylphenyl, α-naphthyl, and β-naphthyl groups.
Examples of the cycloalkyl group and cycloalkenyl group include cyclopentyl, cyclohexyl, cycloheptyl, methylcyclopentyl, methylcyclohexyl, methylcycloheptyl, cyclopentenyl, cyclohexenyl, cycloheptenyl, methylcyclopentenyl, methylcyclohexenyl, methylcycloheptenyl group, and the like. Is mentioned.
Among these, an alkyl group, an alkenyl group, or an aryl group having 8 to 36 carbon atoms is preferable in order to exhibit excellent antifoaming properties and self-emulsifying properties.
[0008]
In the general formula (1), PO represents an oxypropylene group, and EO represents an oxyethylene group. The part (PO) m- (EO) n- (PO) p in the general formula (1) is constituted by block polymerization of an oxypropylene group and an oxyethylene group. The antifoaming agent represented by the general formula (1) of the present invention exhibits excellent antifoaming properties and self-emulsifying properties depending on the selection of these oxyalkylene groups and the order of block polymerization. In particular, the improvement in self-emulsification is significant compared to conventional antifoaming agents having an oxyalkylene moiety of the RO- (PO)-(EO) type or RO- (EO)-(PO)-(EO) type. .
[0009]
In general formula (1), the degree of polymerization m, n, and p represent numbers from 1 to 1,000. Above all, m is preferably in the range of 5 to 300, and more preferably in the range of 5 to 100, in order to exhibit excellent defoaming properties and self-emulsifying properties. Similarly, n is preferably in the range of 5 to 300, more preferably in the range of 5 to 100. Furthermore, p is preferably in the range of 1 to 100, more preferably in the range of 1 to 50. Further, the molar ratio of PO / EO, that is, (m + p) / n, is preferably 10/1 to 1/3, and more preferably 5/1 to 1/2.
[0010]
In the general formula (1), R 2 is a hydrocarbon group, which may be any of the hydrocarbon groups exemplified above, but is preferably a carboxylic acid residue. The term “carboxylic acid residue” as used herein refers to the R 2 portion of a carboxylic acid represented by R 2 —COOH. Examples of the carboxylic acid residue include an acetic acid residue, a propionic acid residue, a butyric acid residue, an isobutyric acid residue, a valeric acid residue, an isovaleric acid residue, a pivalic acid residue, a caproic acid residue, and capryl. Acid residue, capric acid residue, lauric acid residue, myristic acid residue, palmitic acid residue, stearic acid residue, arachidic acid residue, behenic acid residue, lignoceric acid residue, acrylic acid residue, propiol Acid residue, methacrylic acid residue, crotonic acid residue, zomarinic acid residue, oleic acid residue, linoleic acid residue, linolenic acid residue, gadrenic acid residue, erucic acid residue, ceracoleic acid residue, hydroxy Examples include stearic acid residues, ricinoleic acid residues, benzoic acid residues, toluic acid residues, naphthoic acid residues, and cinnamic acid residues. Among these, capric acid residues, lauric acid residues, myristic acid residues, palmitic acid residues, stearic acid residues, oleic acid residues and the like are preferable.
Further, the molecular weight of the compound represented by the general formula (1) is preferably 500 to 5,000, more preferably 1,000 to 2,500.
[0011]
The antifoaming agent of the present invention may be used in combination with a known antifoaming agent, for example, mineral oil, vegetable oil, aliphatic alcohol, fatty acid, higher alcohol, fatty acid, alkylene oxide adduct such as alkylphenol, or the like.
The addition amount of the antifoaming agent of the present invention may be appropriately set according to the foaming state of the system to be added, but it is usually sufficient to add about 0.1 to 20% by weight based on the system. Since the antifoaming agent of the present invention is excellent in self-emulsifying property, the range of effective addition amount is wider than that of conventional antifoaming agents.
The use of the antifoaming agent of the present invention is not particularly limited. For example, all the foaming obstacles become a problem, such as papermaking pulp industry, paint industry, textile industry, synthetic resin industry, resin emulsion industry, concrete industry, food industry, manufacturing and processing processes using a large amount of water such as manure treatment, wastewater treatment, etc. It can be used for manufacturing and processing processes.
[0012]
【Example】
Hereinafter, the present invention will be described more specifically with reference to examples.
The antifoaming agent of the present invention was produced by the following production examples.
(Synthesis Example 1)
150 g of stearyl alcohol and 2.1 g of KOH as a catalyst were charged into a 3 liter autoclave and replaced with nitrogen gas. Next, 321.9 g of propylene oxide (hereinafter referred to as PO) was fed, and an addition reaction was performed at 100 to 150 ° C. and 1.0 to 7.0 kg / cm 2 for 2 hours. Thereafter, 439.5 g of ethylene oxide (hereinafter referred to as EO) was subjected to an addition reaction for 3 hours under the same conditions of temperature and pressure. Further, 128.6 g of PO was subjected to an addition reaction for 1 hour under the same temperature and pressure conditions and then aged for 3 hours. Thereafter, the catalyst was neutralized with phosphoric acid and vacuum dehydration was performed.
Next, in a four-necked flask equipped with a stirrer, a reflux condenser, and a thermometer, 1000 g of the intermediate synthesized under the above conditions, 156.6 g of stearic acid, and 6 g of NaOH as a catalyst were substituted with nitrogen gas. The esterification reaction was carried out at ˜150 ° C. and normal pressure for 3 hours. After completion of the reaction, the mixture was neutralized with NaOH and dehydrated to obtain an antifoaming agent 1 of the present invention.
[0013]
(Synthesis Example 2)
110 g of lauryl alcohol and 2.1 g of KOH as a catalyst were charged into a 3 liter autoclave and replaced with nitrogen gas. Subsequently, 617.0 g of PO was fed, and an addition reaction was performed at 100 to 150 ° C. and 1.0 to 7.0 kg / cm 2 for 4 hours. Thereafter, 468.1 g of EO was subjected to an addition reaction for 4 hours under the same temperature and pressure conditions. Further, 78.0 g of PO was subjected to an addition reaction for 1 hour under the same conditions of temperature and pressure, and then aged for 3 hours. Thereafter, the catalyst was neutralized with phosphoric acid and vacuum dehydration was performed.
Next, in a four-necked flask equipped with a stirrer, a reflux condenser, and a thermometer, 1000 g of the intermediate synthesized under the above conditions, 91 g of lauric acid and 6 g of NaOH as a catalyst were charged, and after replacement with nitrogen gas, 80 to 150 The esterification reaction was carried out at 3 ° C. and normal pressure for 3 hours. After completion of the reaction, the mixture was neutralized with NaOH and dehydrated to obtain an antifoaming agent 2 of the present invention.
[0014]
Hereafter, the antifoamers 3-6 of this invention were obtained by the same method.
The antifoaming agents used in Examples 1 and 2 below are as follows.
Antifoaming agent 1… C 18 H 37 O (PO) 10 (EO) 18 (PO) 4 COC 17 H 35
Defoaming agent 2 ... C 12 H 25 O (PO) 18 (EO) 18 (PO) 3 COC 11 H 23
Antifoam 3… RO (PO) 7 (EO) 18 (PO) 7 COC 11 H 23
(R is a mixture of C 18 , C 20 and C 22 )
Antifoaming 4 ... C 8 H 17 O ( PO) 10 (EO) 18 (PO) 4 COC 11 H 23
Antifoam 5… RO (PO) 12 (EO) 18 (PO) 7 COC 17 H 33
(R is branch C 24 )
Antifoam 6… RO (PO) 7 (EO) 18 (PO) 7 COC 17 H 35
(R is branch C 8 )
Comparative product 1… C 16 H 33 O (PO) 22 (EO) 8 COC 11 H 23
Comparative product 2… C 16 H 33 O (PO) 22 (EO) 8 H
Comparative product 3… C 18 H 37 O (EO) 3 (PO) 35 (EO) 3 COC 17 H 35
Comparative product 4 ... C 18 H 35 O (AO) 31 COC 11 H 23
(AO is a random adduct with an EO / PO molar ratio of 1/1)
Comparative product 5… C 18 H 37 O (PO) 10 (EO) 18 (PO) 4 H
[0015]
(Example 1)
A defoaming property test was conducted by the following method.
Test method: 200 ml of foaming liquid containing rosin sizing agent, deinking agent and sticker in water was weighed into a 1 liter graduated cylinder with a Kinoshita ball filter installed at the bottom, and 4.0 liters passed through the ball filter. Aeration was performed at a rate of 1 minute, and foamed to a mark of 1,000 ml. Subsequently, the antifoaming agents 1 to 6 of the present invention and comparative products 1 to 5 diluted 200 times with water were added in an amount of 5 ppm. Thereafter, the same ventilation was continued for 5 minutes, and the change in the foam volume was measured. The results are shown in Table 1. However, foam volume = total amount−200 ml.
[0016]
[Table 1]
Figure 0003659605
[0017]
(Example 2)
The emulsion stability test was performed by the following method.
Test method: The antifoaming agents 1 to 6 and the comparative products 1 to 5 of the present invention are weighed into a glass bottle, diluted 10 times and 200 times with 25 ° C. tap water, shaken for 30 seconds at room temperature. After standing for 24 hours, the emulsion stability was visually evaluated. The results are shown in Table 2 below.
[0018]
[Table 2]
Figure 0003659605
[0019]
【The invention's effect】
Since this invention was comprised as mentioned above, it can provide the antifoamer which is excellent in self-emulsification property and shows the high antifoaming effect in a small quantity.

Claims (6)

下記の一般式(1):
1O−(PO)m−(EO)n−(PO)p−COR2 (1)
(式中、R1及びR2は炭化水素基を表し、POはオキシプロピレン基を表し、EOはオキシエチレン基を表し、m、n及びpは1〜1,000の数を表す)
で表される化合物を含有する消泡剤。
The following general formula (1):
R 1 O- (PO) m- ( EO) n- (PO) p-COR 2 (1)
(In the formula, R 1 and R 2 represent a hydrocarbon group, PO represents an oxypropylene group, EO represents an oxyethylene group, and m, n, and p represent a number of 1 to 1,000).
The antifoamer containing the compound represented by these.
1が炭素数8〜36のアルキル基、アルケニル基又はアリール基である請求項1記載の消泡剤。The antifoaming agent according to claim 1, wherein R 1 is an alkyl group, alkenyl group or aryl group having 8 to 36 carbon atoms. 2が炭素数7〜23のカルボン酸残基である請求項1又は2記載の消泡剤。The antifoaming agent according to claim 1 or 2, wherein R 2 is a carboxylic acid residue having 7 to 23 carbon atoms. (m+p)/nのモル比が、10/1〜1/3である請求項1乃至3のいずれか1項記載の消泡剤。The antifoaming agent according to any one of claims 1 to 3, wherein a molar ratio of (m + p) / n is 10/1 to 1/3. (m+p)/nのモル比が、5/1〜1/2である請求項4記載の消泡剤。The antifoaming agent according to claim 4, wherein a molar ratio of (m + p) / n is 5/1 to 1/2. 一般式(1)で表される化合物の分子量が500〜5,000である請求項1乃至5のいずれか1項記載の消泡剤。The antifoaming agent according to any one of claims 1 to 5, wherein the compound represented by the general formula (1) has a molecular weight of 500 to 5,000.
JP14041196A 1996-06-03 1996-06-03 Antifoam Expired - Fee Related JP3659605B2 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7862685B2 (en) 2006-01-09 2011-01-04 Kemira Chemicals, Inc. Method for deinking pulp using premixed hydrophobically modified calcium carbonate particles
US8317973B2 (en) 2009-11-11 2012-11-27 Kemira Chemical, Inc. Polyester surfactants for deinking
US8507597B2 (en) 2009-05-15 2013-08-13 Kemira Chemicals, Inc. Polymeric defoamer additive

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Publication number Priority date Publication date Assignee Title
JP5568706B2 (en) * 2010-04-14 2014-08-13 サンノプコ株式会社 Antifoam

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7862685B2 (en) 2006-01-09 2011-01-04 Kemira Chemicals, Inc. Method for deinking pulp using premixed hydrophobically modified calcium carbonate particles
US8507597B2 (en) 2009-05-15 2013-08-13 Kemira Chemicals, Inc. Polymeric defoamer additive
US8317973B2 (en) 2009-11-11 2012-11-27 Kemira Chemical, Inc. Polyester surfactants for deinking
US8524036B2 (en) 2009-11-11 2013-09-03 Kemira Chemicals, Inc. Polyester surfactants for deinking
US9404216B2 (en) 2009-11-11 2016-08-02 Kemira Chemicals, Inc. Polyester surfactants for deinking

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