JPH0450048B2 - - Google Patents

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Publication number
JPH0450048B2
JPH0450048B2 JP1131500A JP13150089A JPH0450048B2 JP H0450048 B2 JPH0450048 B2 JP H0450048B2 JP 1131500 A JP1131500 A JP 1131500A JP 13150089 A JP13150089 A JP 13150089A JP H0450048 B2 JPH0450048 B2 JP H0450048B2
Authority
JP
Japan
Prior art keywords
oil
composition
silica
antifoaming
weight
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
Application number
JP1131500A
Other languages
Japanese (ja)
Other versions
JPH03104A (en
Inventor
Nobuyuki Terae
Yoshinori Iguchi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shin Etsu Chemical Co Ltd
Original Assignee
Shin Etsu Chemical Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shin Etsu Chemical Co Ltd filed Critical Shin Etsu Chemical Co Ltd
Priority to JP13150089A priority Critical patent/JPH03104A/en
Publication of JPH03104A publication Critical patent/JPH03104A/en
Publication of JPH0450048B2 publication Critical patent/JPH0450048B2/ja
Granted legal-status Critical Current

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Description

【発明の詳細な説明】[Detailed description of the invention]

≪産業上の利用分野≫ 本発明は消泡剤組成物に関し、特に分散安定性
に優れた消泡剤組成物に関する。 ≪従来技術≫ 従来より、オルガノポリシロキサン油や炭化水
素油のような疎水性油を主成分として、これに微
粉末シリカのような無機充填剤又は(CH33Si1/2
単位とSiO2単位からなる共重合体及び微粉末シ
リカからなる充填剤を配合した消泡剤組成物が知
られている(例えば特公昭37−14491号、同43−
7691号、同45−13945号、同45−23613号、同46−
14330号、同47−1602号、同47−13487号、同51−
35556号等)。 しかしながら、オルガノポリシロキサンや炭化
水素油のような疎水性油に微粉末シリカを配合し
た消泡剤は、疎水性油とシリカの親和性が悪いた
め分散安定性が悪く、経時によつてシリカが沈降
したり発泡系中で凝集を起こし、オイルスポツト
やシリコーン付着による汚れの原因となるという
欠点があつた。 又、オルガノポリシロキサン油や炭化水素油の
ような疎水性油に(CH33Si1/2単位とSiO2単位か
らなる共重合体を配合した消泡剤は、分散安定性
は良いものの消泡効果がシリカ微粉末を配合した
ものに比べて著しく劣るという欠点があるため、
シリカ微粉末を併用しなければ十分な消泡効果を
発揮することは困難であつた。 本発明者等は係る欠点を解決すべく鋭意検討し
た結果、オルガノポリシロキサン油及び/又は炭
化水素油を主成分とし、この疎水性油に平均粒径
0.1〜20μmのポリメチルシルセスキオキサン粉末
を充填剤として配合した場合には、得られた消泡
剤組成物の分散安定性が極めて良好であり、経時
によつても成分間の分離が生ずることがない上、
発泡系で凝集を起こしたり、オイルスポツトやシ
リコーン付着による汚れを発生することがないこ
とを見出し本発明に到達した。 ≪発明が解決しようとする課題≫ 従つて本発明の第1の目的は経時によつて成分
の分離がなく、長期にわたつて安定な消泡剤組成
物を提供することにある。 本発明の第2の目的は発泡系で凝集を起こし
て、オイルスポツトやシリコーン付着による汚れ
を発生させるということのない消泡剤組成物を提
供することにある。 ≪課題を解決するための手段≫ 即ち、本発明はオルガノポリシロキサン油及
び/又は炭化水素油から成る疎水性油:100重量
部と平均粒径0.1〜20μmのポリメチルシルセス
キオキサン粉末:5〜100重量部を均一に混合せ
しめた混合物より成ることを特徴とする消泡剤組
成物である。 本発明の組成物を構成する第1成分としての疎
水性基油はオルガノポリシロキサン油又は炭化水
素油から選択される。このオルガノポリシロキサ
ン油は一般式 で示される。式中、R1はメチル基、エチル基、
プロピル基、ブチル基等のアルキル基;ビニル
基、トリル基等のアリール基;これらの基の炭化
水素に結合した水素原子の1部又は全部がハロゲ
ン原子、シアノ基等で置換されたクロロメチル
基、3,3,3−トリフルオロプロピル基、シア
ノプロピル基等のような同種又は異種の炭素数1
〜20の非置換又は置換の一価炭化水素基から選択
され、aの平均値は1.9〜2.1であることが適当で
ある。 このようなオルガノポリシロキサン油としては
ジメチルポリシロキサン、ジエチルポリシロキサ
ン、メチルフエニルポリシロキサン、ポリジメチ
ル−ポリジフエニルシロキサンコポリマー、ポリ
メチル−3,3,3−トリフルオロプロピルシロ
キサン、ポリジメチル−クロロプロピルメチルシ
ロキサン等が例示されるが、消泡性及び経済性の
観点からジメチルポリシロキサン油が特に好まし
い。上記オルガノポリシロキサンの末端は通常ト
リメチルシリル基で封鎖されるが、上記末端は水
酸基で封鎖されてもよい。 一方、炭化水素油としては脂肪族炭化水素油、
脂環式炭化水素油、芳香族炭化水素油等が挙げら
れるが、特に70℃以上の沸点を有する脂肪族系の
ものが好ましく、その具体例としては、例えばヘ
プタン、オクタン、ノナン、デカン、ドデカン、
テトラデカン、ヘキサデカン等を例示することが
できる。 尚、これらの基油は常温で液体であれば良い
が、消泡性及び作業性の観点から、25℃における
粘度が20〜1000000cSのものであることが好まし
く、50〜10000cSの範囲のものが特に好ましい。 本発明の組成物における第2成分のポリメチル
シルセスキオキサン粉末は充填剤として用いられ
るものであり、これを配合することにより組成物
に消泡性を付与することができる。この粉末は従
来のシリカ微粉末のような無機充填剤に比べて比
重が小さくしかも疎水性油との親和性が良いた
め、多量に充填しても組成物の比重はあまり大き
くならない上粘度上昇も小さいので、本発明の組
成物は極めて流動性に富み使用し易いものとな
る。又、この粉末は夫々独立した球状であり、且
つ粒径分布がその平均粒径の±30%の範囲内にあ
るものの割合が80重量%以上であることが好まし
い。 本発明に用いられる上記ポリメチルシルセスキ
オキサン粉末は、一般的には、メチルアルコキシ
シラン又はその部分加水分解物をアルカリ性物質
を含む水溶液中で加水分解縮合させたものを脱
水・乾燥し取り出したものが自由流動性に優れる
ので好ましいが、これに限定されるものではな
く、例えば、アルカリ土類金属水酸化物又はアル
カリ金属炭酸塩を含む水溶液中で、メチルトリア
ルコキシシランを加水分解縮合させる方法(特公
昭56−39808号)、アンモニア又はアミン類の水溶
液中で、メチルトリアルコキシシラン及び/又は
その部分加水分解縮合物を加水分解、縮合させる
方法(特開昭60−13813号、同63−77940号)等の
公知の方法によつて製造することができる。 ポリメチルシルセスキオキサン粉末の粒径は
0.1〜20μm、好ましくは0.5〜6μmである。0.1μm
未満の場合は球状の微粒子の製造が困難である
上、取り扱いが容易でなく均一に分散することが
困難であり、20μmを超える場合は消泡性を十分
に付与することができない。 本発明の組成物における第2成分の配合量は特
に制限されるものではないが、第1成分100重量
部に対して5〜100重量部とすることが好ましく、
特に10〜60重量部とすることが好ましい。配合量
が5重量部より少ないと十分な消泡効果が得られ
ない上オイルスポツトが発生し易くなる。一方、
配合量が100重量部を超えると組成物の粘度が高
くなり作業性に乏しくなる上消泡性も劣化する。 本発明においては上記第1及び第2成分を必須
成分とすることによつて、優れた分散安定性を有
する消泡剤組成物を得ることができるが、この第
1及び第2成分に加え、第3成分として微粉末シ
リカを配合することにより更に破泡性と消泡効果
に速効性を付与することができる。この第3成分
としての微粉末シリカは、従来からシリカ系充填
剤として公知の乾式シリカ又は湿式シリカの何れ
であつても良い。このような微粉末シリカとして
は沈降シリカ、シリカキセロゲル、ヒユームドシ
リカ及びこれらの表面を有機シリル基で処理した
処理シリカ等を挙げることができ、具体的にはア
エロジル(日本アエロジル社製 商品名)、ニプ
シル(日本シリカ社製 商品名)、サイロイド
(富士デイヴイリン社製 商品名)、キヤボシル
(米国キヤボツト製 商品名)、サントセル(米国
モンサントケミカル社製 商品名)等を例示する
ことができる。尚、この微粉末シリカはBET法
による比表面積が50m2/g以上のものが良く、配
合量は前記した第1成分としての疎水性油100重
量部に対して1〜20重量部、好ましくは3〜15重
量部である。1重量部以下ではその性能が十分発
揮されず、20重量部以上とすると組成物の粘度が
増大して作業性が悪くなり、取り扱いが困難とな
るのみならず組成物の分散安定性も悪くなる。 本発明の消泡剤組成物は上記した第1,第2成
分及び必要に応じて添加する第3成分の所定量を
適宜撹拌機構をもつ混合機中で混合することによ
つて容易に得ることができるが、発泡系に添加す
る場合にはこれを有機溶剤中に分散させ、更には
適当な界面活性剤を用いて乳化したエマルジヨン
型として使用しても良い。 このような有機溶剤としては脂肪族炭化水素系
溶剤、芳香族炭化水素系溶剤、塩素化炭化水素系
溶剤、エーテル系溶剤、アルコール系溶剤等を挙
げることができる。 又、界面活性剤としてはソルビタン脂肪酸エス
テル、グリセリン脂肪酸エステル、ポリオキシエ
チレン脂肪酸エステル、ポリオキシエチレンソル
ビタン脂肪酸エステル、ポリオキシエチレンアル
キルエーテル、エチレンオキサイドやプロピレン
オキサイドのブロツク共重合体などが例示される
が、これらに限定されるものではない。 エマルジヨン型の消泡剤とした場合には、乳化
時の保護コロイド剤、増粘剤、安定性向上剤等と
してカルボキシメチルセルロース、ポリビニルア
ルコール、アルギン酸ソーダ、シヨ糖脂肪酸エス
テル、ヒドロキシメチルセルロース、カルボキシ
エチルセルロース等を添加しても良い。 本発明の消泡剤組成物はこれをそのまま発泡系
に添加すれば良いが、目的や用途に応じてメチル
セルロース、ポリビニルアルコール、乳糖、デキ
ストリン、親水性微粉末シリカ、澱粉などの微粉
末担体を上記した界面活性剤と共に添加して粉末
消泡剤として使用しても良く、更に、固形の界面
活性剤及び水溶性ワツクス等と混合することによ
り固形化して使用しても良い。 ≪発明の効果≫ 本発明の消泡性組成物は疎水性油と親和性の良
いポリメチルシルセスキオキサンを充填剤として
使用するので経時安定性が良好であるのみなら
ず、オイルスポツトやシリコーン付着を防止する
ことができるので使用時に汚れを生ずることがな
い。特に、微粉末シリカを第3成分として配合し
た場合には、破泡性と消泡効果に速効性を付与す
ることができるので本発明の組成物はより一層有
用となる。 ≪実施例≫ 以下に本発明を実施例によつて更に詳述する
が、本発明はこれによつて限定されるものではな
い。 実施例 1 ポリメチルシルセスキオキサンP−1〜P−4
の製造 ポリメチルシルセスキオキサンを、次に示す方
法により合成した。 撹拌機、温度計、滴下ロート及び冷却用ジヤケ
ツト付の60のステンレス製容器に、第1表に示
す濃度の水酸化カリウム水溶液となるように、水
と水酸化カリウムを仕込み、15℃に冷却した。 次にメチルトリメトキシシランの所定量を、撹
拌しながら2時間かけて滴下し、その間温度及び
撹拌回転数を一定に保つた。 滴下終了後更に1時間撹拌を継続した後、酢酸
を添加して中和した。生成した懸濁液を濾過し、
遠心分離機で脱水と水洗を2回繰り返してケーキ
状にした。これを乾燥機にて150℃で含水率2.0%
以下になる迄乾燥し、更にジエツトミルで解砕し
自由流動性に優れた粉末状のポリメチルシルセス
キオキサンP−1〜P−4を得た。
<<Industrial Application Field>> The present invention relates to an antifoam composition, and particularly to an antifoam composition with excellent dispersion stability. ≪Prior Art≫ Conventionally, hydrophobic oils such as organopolysiloxane oils and hydrocarbon oils are the main ingredients, and inorganic fillers such as finely powdered silica or (CH 3 ) 3 Si 1/2 are added to this.
Antifoam compositions containing a copolymer consisting of SiO 2 units and a filler consisting of finely powdered silica are known (for example, Japanese Patent Publications Nos. 37-14491 and 43-
No. 7691, No. 45-13945, No. 45-23613, No. 46-
No. 14330, No. 47-1602, No. 47-13487, No. 51-
35556 etc.). However, antifoaming agents that contain finely powdered silica in a hydrophobic oil such as organopolysiloxane or hydrocarbon oil have poor dispersion stability due to the poor affinity between the hydrophobic oil and silica, and the silica deteriorates over time. It has the disadvantage that it settles or aggregates in the foaming system, causing stains due to oil spots and silicone adhesion. In addition, antifoaming agents containing a copolymer consisting of (CH 3 ) 3 Si 1/2 units and SiO 2 units in hydrophobic oils such as organopolysiloxane oils and hydrocarbon oils have good dispersion stability, but The disadvantage is that the antifoaming effect is significantly inferior to those containing fine silica powder.
It was difficult to exhibit a sufficient antifoaming effect unless fine silica powder was used in combination. As a result of intensive studies to solve these drawbacks, the inventors of the present invention found that the main component of the hydrophobic oil is organopolysiloxane oil and/or hydrocarbon oil, and the average particle size of the hydrophobic oil is
When polymethylsilsesquioxane powder of 0.1 to 20 μm is blended as a filler, the resulting antifoam composition has extremely good dispersion stability, and separation between components occurs even over time. Not only that, but
The present invention was achieved by discovering that foaming systems do not cause aggregation or stains due to oil spots or silicone adhesion. <<Problems to be Solved by the Invention>> Accordingly, the first object of the present invention is to provide an antifoam composition that does not separate its components over time and is stable over a long period of time. A second object of the present invention is to provide an antifoam composition that does not cause agglomeration in a foaming system and cause stains due to oil spots or silicone adhesion. <<Means for Solving the Problem>> That is, the present invention provides 100 parts by weight of a hydrophobic oil consisting of an organopolysiloxane oil and/or a hydrocarbon oil and 5 parts of polymethylsilsesquioxane powder with an average particle size of 0.1 to 20 μm. This antifoaming agent composition is characterized in that it consists of a mixture of 100 parts by weight uniformly mixed. The hydrophobic base oil as the first component constituting the composition of the present invention is selected from organopolysiloxane oils or hydrocarbon oils. This organopolysiloxane oil has the general formula It is indicated by. In the formula, R 1 is a methyl group, an ethyl group,
Alkyl groups such as propyl and butyl groups; Aryl groups such as vinyl and tolyl groups; Chloromethyl groups in which part or all of the hydrogen atoms bonded to the hydrocarbons of these groups are substituted with halogen atoms, cyano groups, etc. , 3,3,3-trifluoropropyl group, cyanopropyl group, etc.
Suitably, it is selected from ~20 unsubstituted or substituted monovalent hydrocarbon groups, and the average value of a is from 1.9 to 2.1. Such organopolysiloxane oils include dimethylpolysiloxane, diethylpolysiloxane, methylphenylpolysiloxane, polydimethyl-polydiphenylsiloxane copolymer, polymethyl-3,3,3-trifluoropropylsiloxane, polydimethyl-chloropropyl Examples include methylsiloxane, but dimethylpolysiloxane oil is particularly preferred from the viewpoint of antifoaming properties and economical efficiency. The terminals of the organopolysiloxane are usually capped with trimethylsilyl groups, but the terminals may be capped with hydroxyl groups. On the other hand, hydrocarbon oils include aliphatic hydrocarbon oil,
Examples include alicyclic hydrocarbon oils and aromatic hydrocarbon oils, but aliphatic oils having a boiling point of 70°C or higher are particularly preferred, and specific examples thereof include heptane, octane, nonane, decane, and dodecane. ,
Examples include tetradecane and hexadecane. Note that these base oils may be liquid at room temperature, but from the viewpoint of antifoaming properties and workability, it is preferable that the viscosity at 25°C is 20 to 1,000,000 cS, and those in the range of 50 to 10,000 cS are preferable. Particularly preferred. The polymethylsilsesquioxane powder, which is the second component in the composition of the present invention, is used as a filler, and by blending it, antifoaming properties can be imparted to the composition. This powder has a lower specific gravity than conventional inorganic fillers such as fine silica powder, and has good affinity with hydrophobic oils, so even if it is filled in a large amount, the specific gravity of the composition will not increase too much, and the viscosity will not increase. Because of their small size, the compositions of the present invention are extremely fluid and easy to use. Further, it is preferable that this powder has an independent spherical shape, and that the proportion of particles having a particle size distribution within a range of ±30% of the average particle size is 80% by weight or more. The polymethylsilsesquioxane powder used in the present invention is generally obtained by hydrolyzing and condensing methylalkoxysilane or a partially hydrolyzed product thereof in an aqueous solution containing an alkaline substance, then dehydrating and drying the product. This method is preferred because it has excellent free-flowing properties, but is not limited to this method. For example, a method of hydrolyzing and condensing methyltrialkoxysilane in an aqueous solution containing an alkaline earth metal hydroxide or an alkali metal carbonate. (Japanese Patent Publication No. 56-39808), a method of hydrolyzing and condensing methyltrialkoxysilane and/or its partially hydrolyzed condensate in an aqueous solution of ammonia or amines (Japanese Patent Publication No. 60-13813, 63- No. 77940) and other known methods. The particle size of polymethylsilsesquioxane powder is
It is 0.1 to 20 μm, preferably 0.5 to 6 μm. 0.1μm
If it is less than 20 μm, it is difficult to produce spherical fine particles, and it is also difficult to handle and uniformly disperse, and if it exceeds 20 μm, sufficient antifoaming properties cannot be imparted. Although the amount of the second component in the composition of the present invention is not particularly limited, it is preferably 5 to 100 parts by weight per 100 parts by weight of the first component.
In particular, it is preferably 10 to 60 parts by weight. If the blending amount is less than 5 parts by weight, a sufficient antifoaming effect cannot be obtained and oil spots are likely to occur. on the other hand,
If the blending amount exceeds 100 parts by weight, the viscosity of the composition increases, resulting in poor workability and deterioration in antifoaming properties. In the present invention, an antifoam composition having excellent dispersion stability can be obtained by including the first and second components as essential components, but in addition to the first and second components, By blending finely powdered silica as the third component, it is possible to further impart immediate foam-breaking and defoaming effects. The finely powdered silica as the third component may be either dry silica or wet silica, which is conventionally known as a silica filler. Examples of such fine powder silica include precipitated silica, silica xerogel, fumed silica, and treated silica whose surfaces are treated with organic silyl groups.Specifically, Aerosil (trade name, manufactured by Nippon Aerosil Co., Ltd.), Nipsil (trade name, manufactured by Nippon Silica Co., Ltd.), Cyroid (trade name, manufactured by Fuji Day Vilin Co., Ltd.), Cabosil (trade name, manufactured by Cabot, USA), Santocel (trade name, manufactured by Monsanto Chemical Company, USA), etc. can be exemplified. The finely powdered silica preferably has a specific surface area of 50 m 2 /g or more as measured by the BET method, and the blending amount is 1 to 20 parts by weight, preferably 1 to 20 parts by weight, per 100 parts by weight of the hydrophobic oil as the first component. It is 3 to 15 parts by weight. If it is less than 1 part by weight, its performance will not be fully demonstrated, and if it is more than 20 parts by weight, the viscosity of the composition will increase, resulting in poor workability, making it difficult to handle, and also worsening the dispersion stability of the composition. . The antifoam composition of the present invention can be easily obtained by mixing the above-mentioned first and second components and a predetermined amount of the third component added as necessary in a mixer having an appropriate stirring mechanism. However, when added to a foaming system, it may be used as an emulsion by dispersing it in an organic solvent and emulsifying it with a suitable surfactant. Examples of such organic solvents include aliphatic hydrocarbon solvents, aromatic hydrocarbon solvents, chlorinated hydrocarbon solvents, ether solvents, and alcohol solvents. Examples of surfactants include sorbitan fatty acid ester, glycerin fatty acid ester, polyoxyethylene fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene alkyl ether, and block copolymers of ethylene oxide and propylene oxide. , but not limited to these. When using an emulsion type antifoaming agent, carboxymethyl cellulose, polyvinyl alcohol, sodium alginate, sucrose fatty acid ester, hydroxymethyl cellulose, carboxyethyl cellulose, etc. are used as protective colloid agents, thickeners, stability improvers, etc. during emulsification. May be added. The antifoaming agent composition of the present invention may be added to the foaming system as it is, but depending on the purpose and use, fine powder carriers such as methyl cellulose, polyvinyl alcohol, lactose, dextrin, hydrophilic fine powder silica, starch, etc. may be added to the foaming system. It may be used as a powder antifoaming agent by adding it together with a surfactant, or it may be solidified by mixing with a solid surfactant and a water-soluble wax. ≪Effects of the Invention≫ The antifoaming composition of the present invention uses polymethylsilsesquioxane, which has good affinity with hydrophobic oils, as a filler, so it not only has good stability over time, but also has good resistance to oil spots and silicone. Since adhesion can be prevented, no stains occur during use. In particular, when finely powdered silica is blended as the third component, the composition of the present invention becomes even more useful because it can provide immediate foam-breaking and defoaming effects. <<Example>> The present invention will be described in more detail below with reference to Examples, but the present invention is not limited thereto. Example 1 Polymethylsilsesquioxane P-1 to P-4
Production of polymethylsilsesquioxane was synthesized by the method shown below. Water and potassium hydroxide were charged into 60 stainless steel containers equipped with a stirrer, thermometer, dropping funnel, and cooling jacket to give an aqueous potassium hydroxide solution with the concentration shown in Table 1, and the mixture was cooled to 15°C. . Next, a predetermined amount of methyltrimethoxysilane was added dropwise over 2 hours while stirring, while the temperature and stirring rotation speed were kept constant. After the dropwise addition was completed, stirring was continued for an additional hour, and then acetic acid was added to neutralize the mixture. Filter the resulting suspension,
Dehydration and water washing were repeated twice using a centrifugal separator to form a cake. This is dried in a dryer at 150℃ with a moisture content of 2.0%.
The mixture was dried to the following degree and further crushed in a diet mill to obtain powdered polymethylsilsesquioxanes P-1 to P-4 with excellent free-flowing properties.

【表】 合
疎水性油として、両末端がトリメチルシリル基
で封鎖された、ジメチルポリシロキサンKF−96
〔信越化学工業(株)製 商品名〕を使用すると共に
微粉末充填剤として先に合成したポリメチルシル
セスキオキサン粉末P−1及びP−2を第2表に
示す割合で使用し、150℃で3時間撹拌して充填
剤をベースシリコーンオイル中に均一に分散し消
泡剤組成物A〜Dを得た。 尚、比較試料としてポリメチルシルセスキオキ
サンの代わりに、微粉末シリカであるアエロジル
〔日本アエロジル(株)製 商品名〕又はニプシル
〔日本シリカ工業(株)製 商品名〕を使用して消泡
剤組成物E〜Gを、又ポリメチルシルセスキオキ
サンの代わりにCH3 SiO1/2単位とSiO2単位との
モル比が0.75であるシリコーン樹脂(50%キシレ
ン溶液)を使用して消泡剤組成物Hを得た。 これらの消泡剤組成物の特性について、粘度、
分散安定性、及び作業性を調べ、更に各消泡剤組
成物を10%テトラハイドロフラン溶液とし、この
溶液1.0gを添加して消泡性試験を行つたところ、
第2表に示した通りの結果が得られた。 尚、消泡剤組成物の特性及び消泡性試験は下記
の方法によつて測定又は評価した。 粘度:BM型回転粘度計を用いて25℃で測定。 分散安定性:消泡剤組成物をガラスビンに入れて
静置し、1週間後に外観を観察し、充
填剤が分離沈降しているかどうかを判
定した。 消泡剤性試験:内容積が1000mlのメスシリンダ
ーに0.2%の濃度のオレイン酸ソーダ水溶液100g
を秤取し、これに所定量の消泡剤を添加し、次い
でガラスボールフイルターを通して1/分の速
度で空気を連続的に吹き込んだときの起泡量の経
時変化を測定した。
[Table] Dimethylpolysiloxane KF-96, which is a hydrophobic oil and has both ends capped with trimethylsilyl groups.
[Product name manufactured by Shin-Etsu Chemical Co., Ltd.] and the previously synthesized polymethylsilsesquioxane powders P-1 and P-2 as fine powder fillers were used in the proportions shown in Table 2. The filler was uniformly dispersed in the base silicone oil by stirring at ℃ for 3 hours to obtain antifoam compositions A to D. As a comparison sample, instead of polymethylsilsesquioxane, fine powdered silica Aerosil (trade name, manufactured by Nippon Aerosil Co., Ltd.) or Nipsil (trade name, manufactured by Nippon Silica Industry Co., Ltd.) was used to defoam. Agent compositions E to G were also quenched using a silicone resin (50% xylene solution) with a molar ratio of CH 3 SiO 1/2 units to SiO 2 units of 0.75 instead of polymethylsilsesquioxane. Foam composition H was obtained. Regarding the properties of these antifoam compositions, viscosity,
Dispersion stability and workability were investigated, and each antifoam composition was made into a 10% tetrahydrofuran solution, and 1.0 g of this solution was added to perform an antifoaming test.
The results shown in Table 2 were obtained. The properties and antifoaming properties of the antifoam composition were measured or evaluated by the following methods. Viscosity: Measured at 25℃ using a BM type rotational viscometer. Dispersion stability: The antifoam composition was placed in a glass bottle and allowed to stand, and one week later, the appearance was observed to determine whether the filler had separated and settled. Antifoaming agent test: 100g of sodium oleate aqueous solution with a concentration of 0.2% in a measuring cylinder with an internal volume of 1000ml
was weighed out, a predetermined amount of antifoaming agent was added thereto, and then air was continuously blown through a glass ball filter at a rate of 1/min, and the change over time in the amount of foaming was measured.

【表】【table】

【表】 第2表の結果から、本発明の組成物について
は、その諸特性及び消泡性の両方が満足できるも
のであるのに対し、比較試料の組成物の場合に
は、その要求される諸特性と消泡性を両立させる
ことができないことが実証された。 実施例 2 実施例1で作製した消泡剤組成物A〜H100g
にソルビタンモノステアレート・レオドールSS
−10〔花王(株)製 商品名〕40gとポリオキシエチ
レンソルビタンモノステアレート・レオドール
TO−120〔花王(株)製 商品名〕40gを仕込み、70
〜80℃で15分間撹拌混合した後、20℃の水820g
を、ホモミキサーで撹拌しながら20分間かけて
徐々に添加することにより乳化し、エマルジヨン
型消泡剤(エマルジヨンA〜H)が得られた。こ
のエマルジヨンを10%水希釈液とし、この希釈液
5.0gを添加して消泡試験を行い、更に該希釈液
をガラスビンに入れて静置し、1週間後にエマル
ジヨンが分離沈降しているかどうかを外観観察
し、分散安定性を判定した。 結果は第3表に示した通りである。
[Table] From the results in Table 2, it can be seen that the composition of the present invention satisfies both its various properties and antifoaming properties, whereas the composition of the comparative sample satisfies the required properties. It has been demonstrated that it is not possible to achieve both properties and antifoaming properties. Example 2 100g of antifoam compositions A to H prepared in Example 1
Sorbitan Monostearate Rheodol SS
-10 [Product name manufactured by Kao Corporation] 40g and polyoxyethylene sorbitan monostearate rheodol
TO-120 [manufactured by Kao Corporation, product name] 40g, 70g
After stirring and mixing for 15 minutes at ~80°C, 820 g of water at 20°C
was gradually added over 20 minutes while stirring with a homomixer to emulsify, thereby obtaining emulsion-type antifoaming agents (emulsions A to H). This emulsion is diluted with 10% water, and this diluted solution is
A defoaming test was performed by adding 5.0 g of the diluted solution, and the diluted solution was placed in a glass bottle and allowed to stand. One week later, the appearance was observed to see if the emulsion had separated and settled, and the dispersion stability was determined. The results are shown in Table 3.

【表】【table】

【表】 第3表の結果から明らかな如く、本発明の組成
物をエマルジヨン型とした場合にも、良好な結果
を得ることができることが実証された。 実施例 3 実施例1で使用したジメチルポリシロキサン
KF−96(1000cs)200gと微粉末充填剤として先
に合成したポリメチルシルセスキオキサン粉末P
−3又はP−4 20gを用いて実施例1と同じ処
理を行い、消泡剤組成物K及びLを得た。 これらの組成物の粘度は夫々1700cp及び
1450cpであり、分散安定性、作業性共に良好で
あつた。 更にこれらの消泡剤組成物K及びLを実施例2
と同じ処方に従つて乳化し、エマルジヨン型消泡
剤(エマルジヨンK及びL)が得られた。このエ
マルジヨンK及びLの10%水希釈液の分散安定性
を実施例1と同様にして調べた所、両エマルジヨ
ン共良好であることが確認された。 実施例 4 実施例2及び3で得られたエマルジヨンA〜L
について、以下の方法により希釈の高温安定性試
験及び機械的安定性試験を行つた所、第4表に示
した通りの結果が得られた。 尚、夫々の試験は下記の方法によつて行つた。 希釈液の高温安定性試験: 試料10gを水90gに希釈分散させて200mlのビ
ーカーに入れ、高温滅菌器中において130℃で30
分間加熱した後、室温まで放冷した時の状態観察
を行うと共に、スパチユラーでゆるく撹拌して再
分散させたものについての状態観察を行つて評価
した。 評価基準 ◎……オイル浮きや壁面の汚れがなく、容易に再
分散する。 〇……オイル浮きや壁面の汚れが多少あるが、容
易に再分散する。 Δ……オイル浮きや壁面の汚れがあり、一部は再
分散しない。 ×……オイル浮きや壁面の汚れがあり、殆ど再分
散しない。 希釈液の機械的安定性試験: 試料20gを水180gに希釈させて300mlのビーカ
ーに入れ、ホモミキサーを用いて7000rpmで10分
間撹拌した後の状態を観察して評価した。 評価基準 ◎……オイル浮きや壁面の汚れが殆どない。 〇……オイル浮きはないが壁面は少し汚れる。 Δ……オイル浮きが少しあり壁面も汚れる。 ×……オイル浮きが多量にある。
[Table] As is clear from the results in Table 3, it was demonstrated that good results could be obtained even when the composition of the present invention was made into an emulsion type. Example 3 Dimethylpolysiloxane used in Example 1
200g of KF-96 (1000cs) and polymethylsilsesquioxane powder P synthesized earlier as a fine powder filler
Antifoam compositions K and L were obtained by carrying out the same treatment as in Example 1 using 20 g of P-3 or P-4. The viscosity of these compositions is 1700 cp and
The dispersion stability and workability were both good. Furthermore, these antifoam compositions K and L were used in Example 2.
Emulsification was carried out according to the same recipe as above to obtain emulsion-type antifoaming agents (emulsions K and L). The dispersion stability of emulsions K and L diluted with 10% water was examined in the same manner as in Example 1, and both emulsions were found to be good. Example 4 Emulsions A to L obtained in Examples 2 and 3
A dilution high temperature stability test and a mechanical stability test were conducted using the following method, and the results shown in Table 4 were obtained. In addition, each test was conducted by the following method. High-temperature stability test of diluted solution: Dilute and disperse 10 g of sample in 90 g of water, place in a 200 ml beaker, and heat at 130°C for 30 min in a high-temperature sterilizer.
After heating for a minute, the state was observed when it was allowed to cool to room temperature, and the state was observed and evaluated after being redispersed by gentle stirring with a spatula. Evaluation criteria: ◎...There is no oil floating or dirt on the wall surface, and it is easily redispersed. 〇...There is some oil floating and dirt on the wall surface, but it is easily redispersed. Δ...There is oil floating and dirt on the wall surface, and some parts are not redispersed. ×...There is oil floating and dirt on the wall surface, and there is almost no redispersion. Mechanical stability test of diluted solution: 20 g of sample was diluted with 180 g of water, placed in a 300 ml beaker, stirred for 10 minutes at 7000 rpm using a homomixer, and then the state was observed and evaluated. Evaluation criteria: ◎...There is almost no oil floating or dirt on the wall surface. 〇...There is no oil floating, but the wall surface is a little dirty. Δ...There is some oil floating and the wall surface is also dirty. ×...There is a large amount of oil floating.

【表】 第4表の結果から明らかな如く、本発明の組成
物は、高温安定性及び機械的安定性共に十分満足
し得るものであることが実証された。
[Table] As is clear from the results in Table 4, it was demonstrated that the composition of the present invention was sufficiently satisfactory in both high temperature stability and mechanical stability.

Claims (1)

【特許請求の範囲】 1 オルガノポリシロキサン油及び/又は炭化水
素油から成る疎水性油: 100重量部 2 平均粒径0.1〜20μmの球状のポリメチルシル
セスキオキサン粉末: 5〜100重量部 を均一に混合せしめた混合物より成る消泡剤組成
物。
[Claims] 1. Hydrophobic oil consisting of organopolysiloxane oil and/or hydrocarbon oil: 100 parts by weight. 2. Spherical polymethylsilsesquioxane powder with an average particle size of 0.1 to 20 μm: 5 to 100 parts by weight. An antifoam composition comprising a homogeneously mixed mixture.
JP13150089A 1989-05-26 1989-05-26 Deforming agent composition Granted JPH03104A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13150089A JPH03104A (en) 1989-05-26 1989-05-26 Deforming agent composition

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13150089A JPH03104A (en) 1989-05-26 1989-05-26 Deforming agent composition

Publications (2)

Publication Number Publication Date
JPH03104A JPH03104A (en) 1991-01-07
JPH0450048B2 true JPH0450048B2 (en) 1992-08-13

Family

ID=15059467

Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
JP (1) JPH03104A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0329192D0 (en) * 2003-12-17 2004-01-21 Dow Corning Foam control compositions
US8063113B2 (en) * 2008-04-23 2011-11-22 Momentive Performance Materials Inc. Polyurethane foam-forming compositions containing polysilsesquioxane cell opening agents

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63147507A (en) * 1986-07-18 1988-06-20 Dow Corning Kk Production of silicone defoaming agent composition
JPS63256696A (en) * 1987-04-13 1988-10-24 Toshiba Silicone Co Ltd Composition for lubrication
JPH01266141A (en) * 1988-04-19 1989-10-24 Toshiba Silicone Co Ltd Surface-treated fine polyorganosilsesquioxane powder

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63147507A (en) * 1986-07-18 1988-06-20 Dow Corning Kk Production of silicone defoaming agent composition
JPS63256696A (en) * 1987-04-13 1988-10-24 Toshiba Silicone Co Ltd Composition for lubrication
JPH01266141A (en) * 1988-04-19 1989-10-24 Toshiba Silicone Co Ltd Surface-treated fine polyorganosilsesquioxane powder

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