JPS58155354A - Dispersant for magnetic powder liquid used for magnetic flaw detection - Google Patents
Dispersant for magnetic powder liquid used for magnetic flaw detectionInfo
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- JPS58155354A JPS58155354A JP57037278A JP3727882A JPS58155354A JP S58155354 A JPS58155354 A JP S58155354A JP 57037278 A JP57037278 A JP 57037278A JP 3727882 A JP3727882 A JP 3727882A JP S58155354 A JPS58155354 A JP S58155354A
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- magnetic powder
- magnetic
- dispersant
- powder liquid
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/83—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields
- G01N27/84—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields by applying magnetic powder or magnetic ink
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- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
- Degasification And Air Bubble Elimination (AREA)
- Emulsifying, Dispersing, Foam-Producing Or Wetting Agents (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、磁気探傷法に用いられる磁粉液用分散剤に関
するものであり、その目的とするところは、長時間にわ
たる消泡効果を維持する能力を備えた磁粉液用分散剤を
提供することにある。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a dispersant for magnetic powder liquid used in magnetic flaw detection, and its purpose is to provide a dispersant for magnetic powder liquid that has the ability to maintain a defoaming effect over a long period of time. The purpose of the present invention is to provide a dispersant.
一般に、磁性体の非破壊検査法の代表的なものとして磁
気探傷法がよく知られている。この方法は、磁性体（例
えば、角鋼片）の表面又は表面下の比較的浅い部分にワ
レやピンホール等の欠陥部が存在する場合に該磁性体に
電流を流すと欠陥部の磁気抵抗は他の健全な部分より大
きいので、その部分に磁束の偏流が生じ空中への漏洩が
起る現象を利用したものであって、磁化された被検査物
の表面に、鉄粉、ステンレススチール粉等の導磁性粉末
（通常、「磁粉」と呼ばれている。）を散布し、上記の
漏洩磁束の部分に磁粉な集合せしめ、その磁粉模様によ
り被検査物の欠陥部を検知する探傷方法であり、磁粉を
被検査物表面に散布するに当っては、磁粉をそのｔま空
気中に分散させて被検査物表面に散布する手法（通常、
「乾式磁気探傷法」と呼ばれている。）と、磁粉を界面
活性剤を用いて水に通常１〜３ｇ／水１ｌの濃度で分散
させて磁粉液とし、この磁粉液を被検査物表面に散布す
る手法（通常、「湿式磁気探傷法」と呼ばれている。）
とがある、後者の湿式磁気探傷法は特に鉄鋼業界に於て
汎用されており、角ピレット、丸ピレット等の鋼材の欠
陥部探傷に利用されている。さて、上記湿式磁気探傷法
において用いられている磁粉液の調製に当っては、「磁
粉液用分散剤」が使用されているごともよく知られてい
る。In general, magnetic flaw detection is well known as a typical non-destructive testing method for magnetic materials. In this method, when a defect such as a crack or a pinhole exists on the surface of a magnetic material (for example, a square piece of steel) or in a relatively shallow part below the surface, when a current is passed through the magnetic material, the magnetic resistance of the defective part is reduced. Because the area is larger than other healthy parts, it utilizes the phenomenon that magnetic flux drifts in that area and leaks into the air. Iron powder, stainless steel powder, etc. This is a flaw detection method in which magnetically conductive powder (usually called ``magnetic powder'') is scattered, and the magnetic particles are collected in the leakage magnetic flux area, and the defective part of the object to be inspected is detected by the pattern of the magnetic particles. When dispersing magnetic particles onto the surface of an object to be inspected, a method (usually,
It is called "dry magnetic flaw detection". ) and a method in which magnetic particles are dispersed in water using a surfactant at a concentration of usually 1 to 3 g/1 liter of water to form a magnetic powder liquid, and this magnetic particle liquid is sprinkled on the surface of the object to be inspected (usually called "wet magnetic flaw detection method"). "It is called.)
The latter wet magnetic flaw detection method is particularly widely used in the steel industry, and is used to detect flaws in steel materials such as square pillets and round pillets. Now, it is well known that a "dispersant for magnetic powder liquid" is used in preparing the magnetic powder liquid used in the above-mentioned wet magnetic flaw detection method.
この磁粉液用分散剤について説明すると次の通りである
。This dispersant for magnetic powder liquid will be explained as follows.
先づ、現在、市販されている磁粉液用分散剤の代表的処
方は喜
シリコン消泡剤１〜３重量嘔←以下、単ＶＣ％とする。First, a typical formulation of dispersants for magnetic powder liquids currently on the market is silicone antifoaming agent 1 to 3% by weight, expressed as VC%.
）と、界面活性剤２〜６ｇ６と、防錆剤３〜５僑と、残
部水とからなるものである。), 2 to 6 g of surfactant, 3 to 5 g of rust preventive, and the balance water.
としたものであって、ジメチルポリシロキサン１０〜３
０−１界面活性剤５〜１０ｓ、残部水なる処方からなり
、市販品としては１例えば「シリコン消泡剤ＫＭ ６８
−１１１ＦＪ 、 ｒａｉｌ ＫＭ−７０」、「同■−
７２１’Ｊ （いづれも商品名・信越化学＠）製）等が
ある。dimethylpolysiloxane 10-3
The formulation consists of 0-1 surfactant for 5 to 10 seconds and the remainder water.
-111FJ, rail KM-70", "same ■-
721'J (all product names, manufactured by Shin-Etsu Chemical @), etc.
また、界面活性剤とは、シリコン消泡剤に配合されてい
るそれと同種のものが選定使用され、ポリオキシエチレ
ンアルキルエーテＡ／ニジ０（ＣＨ，α２０゜Ｈ、ポリ
オキシ脂肪酸エステル：Ｒ−Ｃ■（ＣＨ２Ｃ’Ｈ２０私
Ｂ。In addition, the surfactant is selected from the same kind as that contained in silicone antifoaming agents, and polyoxyethylene alkyl ether A/Niji 0 (CH, α20°H, polyoxy fatty acid ester: R-C (CH2C'H20IB.
ポリオキシエチレンアルキルフェニルエーテＪ４／：Ｒ
＋０Ｃ（ａｌＩ２ｃＥ２０）ｎＨｌ 多価ｙｗ−ｔ−Ａ
／脂肪酸エアルキル基を示す、）の−又は二以上が用い
られている。Polyoxyethylene alkyl phenyl ether J4/:R
+0C(alI2cE20)nHl polyvalent yw-t-A
/representing a fatty acid alkyl group, or two or more of the following are used.
防錆剤としては、鳩知の亜硝酸ソーダー、トリエタノー
ルアミン等が配合されている。As rust preventive agents, Hatochi's sodium nitrite, triethanolamine, etc. are blended.
そして、上記磁粉液用分散剤の代表的使用態様分散剤の
添加濃度が１〜３常永１１とされているのは、上記濃度
Ｏ磁粉を充分に分散させ且つ該磁粉液を被検査物表面に
散布した場合に該表面を均一に濡らすためＫは、少くと
も１ｓ／水１水板４の濃度が必要であり、５％／水１水
板１の濃度としても、この分散並びに濡れ効果の顕著な
向上は認められないからである。Typical usage mode of the dispersant for magnetic powder liquid The reason why the concentration of the dispersant added is 1 to 3 Tsuneaga 11 is to sufficiently disperse the magnetic powder with the above concentration O and to apply the magnetic powder liquid to the surface of the object to be inspected. In order to uniformly wet the surface when sprayed on water, K needs to be at a concentration of at least 1 s/water 1 water plate 4, and even at a concentration of 5%/water 1 water plate 1, this dispersion and wetting effect is This is because no significant improvement was observed.
磁粉液の散布に当って、磁粉が充分に分散しておらず、
また磁粉液が被検査物表面を均一に濡すことができない
ときには実用できる探傷精度が得られないことは当業者
によく知られているところである。When spraying the magnetic powder liquid, the magnetic powder is not dispersed sufficiently.
Further, it is well known to those skilled in the art that if the magnetic powder liquid cannot uniformly wet the surface of the object to be inspected, practical flaw detection accuracy cannot be obtained.
磁粉液の磁粉濃度が１〜５１／水１１とされているのは
、１１／水１ｊ以下の場合には、被検査物表面の欠陥部
に集合する磁粉の量が少なくなって実用できる探傷精度
が得られず、３ｇ７水１ｊ以上の場合には欠陥部以外の
部分にも磁粉が付着し「バックグランド」現象が起り探
傷精度が低下するからであって、この事実も当業者によ
く知られているところである。The reason why the magnetic particle concentration of the magnetic powder liquid is set to be 1 to 51/11 water is because if it is less than 11/1j water, the amount of magnetic particles that collect on the defective part of the surface of the object to be inspected will be small, and the flaw detection accuracy will be practical. is not obtained, and in the case of 3 g 7 water 1 j or more, magnetic particles will adhere to areas other than the defective part, causing a "background" phenomenon and reducing the flaw detection accuracy. This fact is also well known to those skilled in the art. This is where I am.
尚、上記磁粉液用分散剤の処方は、液中の磁粉濃度、そ
の分散性、液の濡れ性及び後述する液の泡立ち現象を勘
案して、定められている屯のである。The formulation of the above-mentioned dispersant for magnetic powder liquid is determined by taking into account the magnetic particle concentration in the liquid, its dispersibility, the wettability of the liquid, and the bubbling phenomenon of the liquid to be described later.
例えば、前記シリコン消泡剤にも界面活性剤が配合され
ているが、これを磁粉液用分散剤に添加１、た場合には
、当該シリコン消泡剤に配合されている界面活性剤の量
だけでは磁粉を充分分散させることは側底不可能＋あ抄
、磁粉を充分分散させるとともに散布時の濡れ性を満足
させるに必要な界面活性剤の量として、前記の通り、２
〜６％の界面活性剤が配合されているのである。尚、こ
の２〜６ｓなる規定量はシリコン消泡剤にあらかじめ配
合されている界面活性剤の量を含むものではない。For example, the silicone antifoaming agent also contains a surfactant, but when this is added to the dispersant for magnetic powder liquid, the amount of surfactant mixed in the silicone antifoaming agent is As mentioned above, the amount of surfactant required to sufficiently disperse the magnetic particles and satisfy the wettability during dispersion is as follows:
It contains ~6% surfactant. Note that this prescribed amount of 2 to 6 seconds does not include the amount of surfactant that is pre-blended in the silicone antifoaming agent.
さて、上記処方の磁粉液用分散剤を上記使用１様によっ
て調製された磁粉液を用いて湿式磁気探傷法が実施され
るに当って、当業界においてネツりとされているのは、
当該磁粉液用分散剤の消泡効果維持時間は、長いとされ
ているものでも、１０〜２４時間程度であり、しかもこ
の時間が夏場には短かくなる傾向にあるという点である
。Now, when carrying out a wet magnetic flaw detection method using a magnetic powder liquid prepared by using the above-mentioned dispersant for magnetic powder liquid according to the above-mentioned method 1, what is considered to be the norm in the industry is as follows:
The antifoaming effect of the dispersant for magnetic powder liquid is maintained for about 10 to 24 hours, even if it is said to be long, and this time tends to become shorter in the summer.
に当っては、磁粉液中の磁粉が常に均一に分散された状
態にあることが委求されるとともに散布された磁粉液が
回収再使用されることが姿求され、この二委求を満たす
ために、当業界では、第１図に示す如き磁粉液攪拌装置
を用い、磁粉液をタンク１に入れ、タンク１よりポン１
２を用いて磁粉液を所定の散布場所に運んで被検査物表
面散布し、散布された磁粉液をタンク１に回収し１回収
された磁粉液を再びタンク１よりボン１２を用いて所定
の散布場所に運んで散布するという循環を繰返す態様が
採られている。尚、この態様については例えば実公昭４
７−４１５１８号公報により詳しく示されている。即ち
、磁粉液は常に攪拌状態で用いられているのである。従
って、使用中の磁粉液は非常に泡立ちし易い状態にある
。もし、泡立ちが激しい場合には、被検査物表面で泡立
ちを起し探傷に支障を来たした秒、またタンク１から泡
があふれ出したりしてしまうことは容易に理解されるで
あろう、か＼る泡立ち現象を押えるために磁粉液用分散
剤には消泡剤が必須成分として配合されているのである
。In order to meet these two requirements, it is required that the magnetic particles in the magnetic powder liquid are always uniformly dispersed, and that the dispersed magnetic powder liquid is collected and reused. Therefore, in this industry, a magnetic powder liquid stirring device as shown in FIG.
2 is used to carry the magnetic powder liquid to a predetermined spraying place and sprinkle it on the surface of the object to be inspected.The dispersed magnetic powder liquid is collected in tank 1. The method is to repeat the cycle of transporting to the spraying site and spraying. Regarding this aspect, for example,
This is shown in detail in Japanese Patent No. 7-41518. That is, the magnetic powder liquid is always used in a stirred state. Therefore, the magnetic powder liquid during use is in a state where it is very easy to foam. It is easy to understand that if there is a lot of foaming, foaming will occur on the surface of the object to be inspected, hindering flaw detection, and the foam will overflow from the tank 1. In order to suppress the foaming phenomenon, an antifoaming agent is included as an essential component in the dispersant for magnetic powder liquid.
前掲の磁粉液用分散剤の代表的処方は、か覧る激しい泡
立ち現象を押える能力、換言すれば消泡効果を維持する
能力が優れている処方として当業界で評価されているも
のであり、このものを用いた磁粉液は使用開始時より１
０〜２４時間は消泡効果を維持する能力を有している。The above-mentioned typical formulation of the dispersant for magnetic powder liquid is evaluated in the industry as having an excellent ability to suppress the visible violent foaming phenomenon, in other words, to maintain an antifoaming effect. The magnetic powder liquid using this product is 1 from the beginning of use.
It has the ability to maintain the defoaming effect for 0 to 24 hours.
尚、との消泡効果維持時間は、磁粉液に対する分散剤の
添加濃度を３チ／水１１以上としても殆んど変らず、ま
た、こＯ消泡効果維持時間経過後に磁粉液が泡立ち現象
を起して来九時に、このものや前記シリコン消泡剤その
ものを追加添加してみても、追加時に泡立ち現象が一時
ＪＫ押えられるだけであり３〜４時間程度経過すれば再
び泡立ち現象が起きてしまう。In addition, the antifoaming effect maintenance time remains almost unchanged even when the concentration of the dispersant added to the magnetic powder liquid is 3 parts per water or more than 11 parts. Even if you try adding this product or the silicone antifoaming agent itself at 9:00 a.m., the foaming phenomenon will only be suppressed temporarily, and the foaming phenomenon will occur again after about 3 to 4 hours. It ends up.
そして、夏場には消泡効果時間が短くなる傾向にあり、
期待できる消泡時間内であるに４か覧わらず、突然、使
用中の磁粉液が泡立ち現象を起し。Also, in the summer, the defoaming effect time tends to be shorter.
Within the expected defoaming time, the magnetic powder liquid that was being used suddenly began to foam.
探傷作業に支障を来たしたり、作業場を汚してしまう事
故が頻発しているのである。Accidents that interfere with flaw detection work and pollute the work area occur frequently.
事実、当業界、特に＃鋼業界においては、夏場において
も少くとも２４時間以上の消泡時間を確実にもつ磁粉液
用分散剤の出現が切望されている。In fact, in this industry, especially in the steel industry, there is a strong desire for a dispersant for magnetic powder liquids that can reliably defoam for at least 24 hours even in the summer.
本発明は、以上の通りの現況に鑑み完成したものである
。The present invention was completed in view of the current situation as described above.
即ち、本発明は、ポリオキシエチレンアルキルエーテル
、ポリオキシ脂肪酸エステル、ポリオキシエチレンアル
キルツエニルエーテル及ヒ多価アルコール脂肪酸エステ
ルから選ばれる１又は２以上の界面活性剤２〜６％と、
ジメチルポリシロキサンを前記と同じ界面活性剤を用い
て水中油型エマルジゴンとしたシリコン消泡剤１〜３−
と、防錆剤３〜５Ｉｓと、ジメチルポリシロキサン−ポ
リオキシアルキレン共重合体（但し、エチレン＆Ｏ七ル
数５以下。）０・１〜０・５９６と、残部水とを配合【
７てなる磁気探傷法に用いられる磁粉液用分散剤である
。That is, the present invention comprises 2 to 6% of one or more surfactants selected from polyoxyethylene alkyl ether, polyoxy fatty acid ester, polyoxyethylene alkyl tzenyl ether, and polyhydric alcohol fatty acid ester;
Silicone antifoaming agents 1-3- made from dimethylpolysiloxane using the same surfactant as above to form an oil-in-water emuldigon.
, a rust preventive agent 3-5Is, a dimethylpolysiloxane-polyoxyalkylene copolymer (ethylene & O 7 yl number 5 or less) 0.1-0.596, and the balance water.
This is a dispersant for magnetic powder liquid used in the magnetic flaw detection method.
次に、本発明の構成、効果を説明する。Next, the configuration and effects of the present invention will be explained.
本発明の最も特徴とする点は、前掲の磁粉液用分散剤の
代表的処方に、更にジメチルポリシロキサン−ポリオキ
シアルキレン共重合体（但し、エチレン基のモル数５以
下、）を０・１〜０・ｓｓ配合した点である。The most characteristic feature of the present invention is that 0.1 dimethylpolysiloxane-polyoxyalkylene copolymer (however, the number of moles of ethylene groups is 5 or less) is added to the typical formulation of the above-mentioned dispersant for magnetic powder liquid. This is the point where ~0.ss was blended.
本発明者は、前掲処方の市販の磁粉液用分散剤の消泡効
果維持時間が最長２４時間程度であり、しかも、この時
間内の消泡能力が保証されているものであっても夏場に
は保証時間内に消泡能力が減少又は消滅してしまう傾向
にある要因について追求した。そして、との要因Ｆｉ、
このものを用いて磁粉液を調製し、骸磁粉液を使用中Ｋ
、当初は水中油型エマルジミンとなっているジメチルポ
リシロキサンが、時間の経過とともにエマルジョン状態
がくずれて、水から分−してしまうとζろにあると考え
た。The present inventor found that the antifoaming effect of the commercially available dispersant for magnetic powder liquid with the above formulation is maintained for a maximum of about 24 hours, and even if the antifoaming ability is guaranteed within this time, it is difficult to maintain the antifoaming effect in the summer. investigated the factors that tend to cause the defoaming ability to decrease or disappear within the guaranteed time. And the factor Fi,
Use this to prepare magnetic powder liquid, and use the magnetic powder liquid.
It was thought that dimethylpolysiloxane, which was initially an oil-in-water emulsion, would lose its emulsion state over time and separate from the water.
即ち、ジメチルポリシロキサンは、シリコン消泡剤中に
ある時ＶＣＦｉ、安定な水中油型エマルジョンとなって
いる（前記のジメチルポリシロキサン１０〜３０囁、界
面活性剤５〜ＩＱ％、残部水なるシリコン消泡剤の処方
は、安定な水中油型エマルジョンとするために設定され
た最適処方である。）。That is, when dimethylpolysiloxane is in a silicone antifoaming agent, it forms a stable oil-in-water emulsion. The antifoam formulation is an optimal formulation designed to create a stable oil-in-water emulsion.)
次Ｋ、ジメチルポリシロキサンが磁粉液用分散剤中にあ
る時、換言すればシリコン消泡剤が磁粉液用分散剤の一
成分として配合された時にも、水中油型エマルジョンと
なっている（磁粉液用分数剤に選定されているのは、水
中油型エマルジョン状態をくずさないためである。）。Next, when dimethylpolysiloxane is present in the dispersant for magnetic powder liquid, or in other words, when silicone antifoaming agent is blended as a component of the dispersant for magnetic powder liquid, an oil-in-water emulsion is formed (magnetic powder It is selected as a fractional agent for liquids because it does not disrupt the oil-in-water emulsion state.)
−に、ジメチルポリシロキサンが磁粉液中にある時、換
言すれば磁粉液用分散剤を用いて磁粉液が調製された時
にも水中油型エマルジョンとなっている。しかし、この
最終段階の磁粉液中にある時には、ジメチルポリシロキ
サンは水中油型エマルジョンとになってはいても、その
状態は不安定なものである。この理由は種々考えられる
が、ジメチルポリシロキサン自体が木質的に界面活性剤
のアルキル基、アルキルフェニル基となシミが悪いこと
が理由の一つとして考えられる。- Also, when dimethylpolysiloxane is present in the magnetic powder liquid, in other words, when the magnetic powder liquid is prepared using a dispersant for magnetic powder liquid, an oil-in-water emulsion is formed. However, when dimethylpolysiloxane is in the magnetic powder liquid at this final stage, even though it becomes an oil-in-water emulsion, its state is unstable. There are various possible reasons for this, but one possible reason is that dimethylpolysiloxane itself is woody and stains easily due to the alkyl and alkylphenyl groups of surfactants.
磁粉ｆｌｉは前述の如く常Ｋ１１ｌ袢状態で用いられ、
か覧る状態にある磁粉液中に不安定な水中油型エマルジ
ョンとして存在するジメチルポリシロキサンは、時間の
経過とともに徐々に水から分離して行き、これとともＫ
その消泡能力も失われて行き、へ立ち現象が起きるので
ある。また、ｉｉ磁粉液使用する現場の湿度が高い程、
詳言すれは磁粉液の水温が高い程、エマルジョン状態が
くずれ易く、ジメチルポリシロキサンの水からの分離が
早くなる。As mentioned above, magnetic powder fli is usually used in the K11L state,
Dimethylpolysiloxane, which exists as an unstable oil-in-water emulsion in the visible magnetic powder liquid, gradually separates from the water over time, and along with this, K
Its antifoaming ability is also lost, and a flattening phenomenon occurs. In addition, the higher the humidity at the site where the magnetic powder liquid is used, the
Specifically, the higher the water temperature of the magnetic powder liquid, the more likely the emulsion state will collapse, and the faster the dimethylpolysiloxane will separate from the water.
本発明者は、前掲処方の市販の磁粉液用分散剤に添加物
を加えることによって消泡効果維持時間を延長できない
かと考え、数多くの物質について系統的な寮験を長期に
わたって行い、その結果、ジメチルポリシロキサン−ポ
リオキシアルキレン共重合体（但し、エチレン基の砥ル
′＃１５以下。）を０・１〜０・５チ添加することが極
めて有効であることを見出したのである。勿論、この添
加によっても磁粉液用分散剤に要求される磁粉の分散性
、液の飾れ性には何等の悪影響を及ぼさないことも併せ
て確認したのである。The present inventor thought that it would be possible to extend the antifoaming effect maintenance time by adding additives to the commercially available dispersant for magnetic powder liquids having the above formulation, and conducted systematic laboratory experiments on a number of substances over a long period of time, and as a result, It has been found that it is extremely effective to add 0.1 to 0.5 inches of dimethylpolysiloxane-polyoxyalkylene copolymer (with the exception of ethylene-based abrasives of #15 or less). Of course, it has also been confirmed that this addition does not have any adverse effect on the dispersibility of magnetic particles and the decorativeness of liquid, which are required of a dispersant for magnetic powder liquid.
ジメチルポリシロキサン−ポリオキシアルキレン共重合
体は、公知物質であり、例えば、次式のものがよく知ら
れておや１
また、市販品としても、「シリコン界面活性剤８Ｐ−２
９９０Ｊ、「同８Ｐ−２９７２Ｊ、 ｒ同８Ｆ−３６
３７Ｊ （いづれも商品名・信越化学（株）製）があ
る。Dimethylpolysiloxane-polyoxyalkylene copolymer is a known substance, for example, the one of the following formula is well known1.
990J, "8P-2972J, r 8F-36
37J (both trade names, manufactured by Shin-Etsu Chemical Co., Ltd.).
本発明において用いるジメチルポリシロキサン−ポリオ
キシアルキレン共重合体は、そのエチレン基のモル数が
５以下のものでなければならない。The dimethylpolysiloxane-polyoxyalkylene copolymer used in the present invention must have a mole number of ethylene groups of 5 or less.
これＶｉ５七ν以上のものは、水に容易に溶解してしま
うものであり、か−るものを加えても消泡効果維持時間
を延長することはできず、かえって磁粉液の泡立ち現象
を助長してしまうことを確認している。Those with Vi57ν or more easily dissolve in water, and even if they are added, it is not possible to extend the antifoaming effect maintenance time, and on the contrary, it promotes the foaming phenomenon of the magnetic powder liquid. I have confirmed that this will happen.
また、添加量は０・１〜０・５９にの範囲でなければな
らず、０・１％以下の場合には効果はなく、かえって磁
粉液の泡立ち現象を助長してしまう、０・１以上の添加
によって消泡効果維持時間を顕著に延長することができ
、この延長効果は水温的３５℃の下においても確実に発
揮され、添加量を増加すればする程、その効果は大きく
なるが、０・５９６以−上の場合には、磁粉の分散性、
液の濡れ性に悪影響を及ぼすことになるので、最大０・
５ｓ迄の添加にとどめなければならない。In addition, the amount added must be in the range of 0.1 to 0.59, and if it is less than 0.1%, there will be no effect, and on the contrary, it will promote the foaming phenomenon of the magnetic powder liquid. By adding , the defoaming effect maintenance time can be significantly extended, and this extended effect is reliably exhibited even at a water temperature of 35°C, and the more the amount added, the greater the effect becomes. In the case of 0.596 or more, the dispersibility of magnetic powder,
Since it will have a negative effect on the wettability of the liquid, the maximum
It must be added for up to 5 seconds.
ジメチルポリシロキサン−ポリオキシアルキレン共重合
体（但し、エチレン基のモル数５以下。）の添加による
消泡効果維持時間の延長効果は、その添加量が極めて小
量であるにもか！わらず驚異的であり、後出実施例にも
見られる通り、未添加のものと比較してその消泡効果維
持時間を２〜５倍にも延長できる。The addition of dimethylpolysiloxane-polyoxyalkylene copolymer (however, the number of moles of ethylene groups is 5 or less) can extend the defoaming effect maintenance time even though the amount added is extremely small! This is still surprising, and as can be seen in the Examples below, the antifoaming effect can be maintained for 2 to 5 times longer than when it is not added.
本発明者は、上記添加効果についての理論的解明は残念
ながらいまだ充分に行えていないが、添加されたジメチ
ルポリシロキサン−ポリオキシアルキレン共重合体（但
し、エチレン基のセル数５以下、）が前記最終段階の磁
粉液中にあるジメチルポリシロキサンと界面活性剤との
間の仲介者的役割を果たし、その結果、ジメチルポリシ
ロキサンの分離が抑制されているものと推定している。Unfortunately, the present inventors have not yet fully elucidated the theoretical effects of the above addition, but the added dimethylpolysiloxane-polyoxyalkylene copolymer (however, the number of ethylene group cells is 5 or less) It is presumed that it plays the role of an intermediary between the dimethylpolysiloxane and the surfactant in the magnetic powder liquid at the final stage, and as a result, separation of the dimethylpolysiloxane is suppressed.
次に、本発明を実施例によって説明する。Next, the present invention will be explained by examples.
実施例 １
処方
■ポリオキシエチレンノニルフェニルエーテ７Ｌ／（１
０毛１輻
■シリコン消泡剤ＫＭ６Ｂ−１７（商品名：信越化学（
株）製ニジメチルポリシロキサンを界面活性剤を用いて
水中油型エマルジョンとしたもの） ５％■
亜硝酸ソーダ ５９６■水
８６．？％■ジメチルポリ
シロキサンーポリオキシアルキレン共重合体（但し、エ
チレン基のモル数１・５）： シリコン界面活性剤８Ｐ
２９？Ｏ（商品名：信越化学（株）製）０．１−
上記処方の磁粉液用分散剤の消泡効果維持時間を次の通
りにして測定した。Example 1 Prescription ■Polyoxyethylene nonyl phenyl ether 7L/(1
0 hairs 1 line■ Silicone antifoaming agent KM6B-17 (Product name: Shin-Etsu Chemical (
Nidimethypolysiloxane manufactured by Co., Ltd., made into an oil-in-water emulsion using a surfactant) 5%■
Sodium nitrite 596 ■ water
86. ? %■ Dimethylpolysiloxane-polyoxyalkylene copolymer (however, the number of moles of ethylene group is 1.5): Silicone surfactant 8P
29? O (trade name: Shin-Etsu Chemical Co., Ltd.) 0.1 - The defoaming effect maintenance time of the dispersant for magnetic powder liquid having the above formulation was measured as follows.
第１図のタンク１（容積１００４）に水６０１を入れ、
これに上記磁粉液用分散剤を１嘔／水ｂ度となるように
６００競添加し、更に磁粉を２９／水ｂ
調製する。次にボン１２を作動させ図中矢印の通りに磁
粉液を循環させる。Fill the tank 1 (volume 1004) in Figure 1 with water 601,
To this, 600 parts of the above-mentioned dispersant for magnetic powder liquid was added so that the ratio was 1 part/b of water, and further magnetic powder was prepared in a ratio of 29 parts/b of water. Next, the bong 12 is operated to circulate the magnetic powder liquid in the direction of the arrow in the figure.
磁粉液の循環開始時点よりタンク１の上面より泡があふ
れ出す時点までの時間を消泡効果維持時間として測定す
る。尚、測定を行ったタンク内の水温は３０°Ｃである
。The time from the start of circulation of the magnetic powder liquid to the time when bubbles overflow from the upper surface of the tank 1 is measured as the defoaming effect maintenance time. Note that the water temperature in the tank at which the measurement was performed was 30°C.
上記処方の磁粉液用分散剤の消泡効果維持時間は、約５
２時間であった。The antifoaming effect maintenance time of the above-mentioned dispersant for magnetic powder liquid is approximately 5
It was 2 hours.
一方、上記処方よ抄■を除き■を８７−とした比較処方
の磁粉液用分散剤の消泡効果維持時間を、上記と同様に
して測定したところ約１５時間であった。On the other hand, the antifoaming effect maintenance time of the dispersant for magnetic powder liquid of the comparative formulation except for the above formulation and the formula (■) being 87- was measured in the same manner as above and was found to be about 15 hours.
実施例 ２
処方
■ポリオキシエチレンラウリルエーテル（１１５モル）
２嘩■
ジメチルポリシロキサンを界面活性剤を用いて水中油型
エマルジョンとしたもの）２ｇ６
■亜硝酸ソーダ ５Ｌｓ■水
９２．８慢■ジメ
チルポリシロキサン−ポリオキシアルキレン共重合体（
但し、エチレン基のモル数３）：シリコン界面活性剤８
Ｐ−２９７２ （商品名：信越化学（株）製）１２％上
記処方の磁粉液用分散剤の消泡効果維持時間と、上記処
方より■を除き■を９３％とした比較処方の磁粉液用分
散剤のそれとを実施例１．と同様にして測定したところ
前者は約５０時間、後者は約２４時間であった。Example 2 Prescription ■Polyoxyethylene lauryl ether (115 mol)
2g6 ■Dimethylpolysiloxane made into an oil-in-water emulsion using a surfactant) 2g6 ■Sodium nitrite 5Ls■Water 92.8g■Dimethylpolysiloxane-polyoxyalkylene copolymer (
However, the number of moles of ethylene group is 3): silicone surfactant is 8
P-2972 (Product name: Shin-Etsu Chemical Co., Ltd.) 12% Defoaming effect maintenance time of the dispersant for magnetic powder liquid with the above formulation and the comparative formulation for magnetic powder liquid with ■ removed from the above formulation and ■ 93% Example 1. When measured in the same manner as above, the former was about 50 hours, and the latter was about 24 hours.
尚、測定を行ったタンク内の温度は３５゛Ｃである。The temperature inside the tank at which the measurements were taken was 35°C.
実施例 五
処方
■ポリオキシエチレンステアレート（６モル）６９６■
シリコン消泡剤ＫＭ−７２７（商品名：信越化学（株）
製ニジメチルポリシロキサンを界面活性Ａ’ｌＪを用い
て水中油型エマルジョンとした本の）
１−■亜硝酸ソーダ ５嘔
■水 ８７・５％■ジ
メチルポリシロキサンーポリオキシアルキレン共重合体
（但し、エチレン基のモル数５）：シリコン界面活性剤
８Ｐ−３６３７（商品名：信越化学輸製）ａ５９Ｇ上記
処方の磁粉液用分散剤の消泡効果維持時間と、上記処方
より■を除き■を８８９６とした比較処方の磁粉液用分
散剤のそれとを実施例１．と同様にして測定Ｌ７たとこ
ろ前者は約４５時間、後者は約ｉｔ）時間であった。Example Five prescriptions ■Polyoxyethylene stearate (6 mol) 696■
Silicone antifoaming agent KM-727 (Product name: Shin-Etsu Chemical Co., Ltd.)
A book that uses surfactant A'lJ to make an oil-in-water emulsion of dimethylpolysiloxane produced by
1- ■ Sodium nitrite 5 ■ Water 87.5% ■ Dimethylpolysiloxane-polyoxyalkylene copolymer (however, the number of moles of ethylene group is 5): Silicone surfactant 8P-3637 (product name: Shin-Etsu Chemical Import) Example 1.) a59G The defoaming effect maintenance time of the dispersant for magnetic powder liquid with the above formulation and that of the dispersant for magnetic powder liquid with a comparative formulation in which ■ is removed from the above formulation and ■ is 8896 are shown in Example 1. Measurement L7 was carried out in the same manner as above, and the former time was about 45 hours, and the latter time was about it) hours.
尚、測定を行ったタンク内の水温ｉ３５”Ｃである。The water temperature in the tank at which the measurement was performed was i35''C.
第１図は、湿式磁気探傷法に汎用されている磁粉液攪拌
装置を示す一部縦断面沓説明図である。
図において、１はタンク、２はボン１．ムは被検査物を
示す、尚、肉牛の矢印は磁粉液の循環系路を示すもので
ある。
特許出願人
特殊塗料株式会社FIG. 1 is a partially longitudinal cross-sectional explanatory view showing a magnetic powder liquid stirring device commonly used in wet magnetic flaw detection. In the figure, 1 is a tank, 2 is a bomb 1. The mark indicates the object to be inspected, and the beef arrow indicates the circulation path of the magnetic powder liquid. Patent applicant Special Paint Co., Ltd.
Claims (1)
脂肪酸エステル、ポリオキシエチレンアルキルフェニル
エーテル及び多価アルコール脂肪酸エステルから選ばれ
る１又は２以上の界面活性剤２〜６％と、ジメチルポリ
シロキサンを前記と同じ界面活性剤を用いて水中油型エ
マルジョンとしたシリコン消泡剤１〜３％と、防錆剤３
〜５％と、ジメチルポリシロキサン−ポリオキシアルキ
レン共重合体（但し、エチレン基のモル数５モル以下。 ）０・１〜０．５％と、残部水とを配合してなる磁気探
傷法に用いられる磁粉液用分散剤。[Claims] 1. 2 to 6% of one or more surfactants selected from polyoxyethylene alkyl ether, polyoxy fatty acid ester, polyoxyethylene alkylphenyl ether, and polyhydric alcohol fatty acid ester, and dimethylpolysiloxane. was made into an oil-in-water emulsion using the same surfactant as above, 1 to 3% silicone antifoaming agent, and 3% rust inhibitor.
~5%, dimethylpolysiloxane-polyoxyalkylene copolymer (however, the number of moles of ethylene group is 5 moles or less) 0.1 to 0.5%, and the balance water. Dispersant for magnetic powder liquid used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57037278A JPS58155354A (en) | 1982-03-11 | 1982-03-11 | Dispersant for magnetic powder liquid used for magnetic flaw detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57037278A JPS58155354A (en) | 1982-03-11 | 1982-03-11 | Dispersant for magnetic powder liquid used for magnetic flaw detection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58155354A true JPS58155354A (en) | 1983-09-16 |
| JPH0259426B2 JPH0259426B2 (en) | 1990-12-12 |
Family
ID=12493216
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57037278A Granted JPS58155354A (en) | 1982-03-11 | 1982-03-11 | Dispersant for magnetic powder liquid used for magnetic flaw detection |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58155354A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000070954A1 (en) * | 1999-05-21 | 2000-11-30 | Ijo Products, Llc | A method of inhibiting fruit set on fruit producing plants using an aqueous emulsion of eicosenyl eicosenoate and docosenyl eicosenoate |
| CN100374856C (en) * | 2004-12-02 | 2008-03-12 | 内蒙古第一机械制造（集团）有限公司 | Water-based magnetic suspending liquid adjusting agent for wet magnetic powder defect detection |
-
1982
- 1982-03-11 JP JP57037278A patent/JPS58155354A/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000070954A1 (en) * | 1999-05-21 | 2000-11-30 | Ijo Products, Llc | A method of inhibiting fruit set on fruit producing plants using an aqueous emulsion of eicosenyl eicosenoate and docosenyl eicosenoate |
| US6156703A (en) * | 1999-05-21 | 2000-12-05 | Ijo Products, Llc | Method of inhibiting fruit set on fruit producing plants using an aqueous emulsion of eicosenyl eicosenoate and docosenyl eicosenoate |
| CN100374856C (en) * | 2004-12-02 | 2008-03-12 | 内蒙古第一机械制造（集团）有限公司 | Water-based magnetic suspending liquid adjusting agent for wet magnetic powder defect detection |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0259426B2 (en) | 1990-12-12 |
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