JP3651077B2 - Liquid management method for water-based industrial degreasing cleaner - Google Patents
Liquid management method for water-based industrial degreasing cleaner Download PDFInfo
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Description
【０００１】
【発明の属する技術分野】
本発明は、水系工業用脱脂洗浄剤の液管理方法に関する。詳しくは、水系工業用脱脂洗浄剤を用いて、油脂類の付着している被洗浄物を洗浄する際に、水系工業用脱脂洗浄剤中に含まれてくる油脂類の濃度を求めることにより水系工業用脱脂洗浄剤の液管理を行う方法に関する。
【０００２】
【従来の技術】
油脂類の付着している被洗浄物に工業用脱脂洗浄剤を使用した場合には、工業用脱脂洗浄剤中の油脂類の濃度が高くなり、洗浄性に悪影響を及ぼす。そのため、工業用脱脂洗浄剤を液管理して、一定期間経過後には工業用脱脂洗浄剤の交換を行わなければならない。特に水系工業用脱脂洗浄剤は、一般的に、洗浄剤の寿命が短く、洗浄剤の交換頻度が多く、その液管理が重要である。
【０００３】
従来より、工業用脱脂洗浄剤を液管理する方法としては、当該洗浄剤の屈折率を測定することにより、屈折率との相関関係で当該洗浄剤中の油分濃度を求める方法が一般的に行われている。しかし、かかる屈折率を利用する方法は、溶剤系または準水系の洗浄剤のように、油脂類を完全に均一に溶解することができる洗浄剤には有効な方法であるものの、水系工業用脱脂洗浄剤のように油脂類が白濁、分散して非均一系状態で存在する場合には応用し難い。
【０００４】
また、水系工業用脱脂洗浄剤を液管理する方法としては、水系工業用脱脂洗浄剤のｐＨを測定する方法、電気電導度を測定する方法、または不揮発分を測定する方法等が一般的に行われている。しかし、ｐＨを測定する方法の場合には測定できる洗浄剤の種類が限定され、また電気電導度を測定する方法の場合には希釈する水の水質の変化により影響を受けやすい問題があり、また不揮発分を測定する方法の場合には測定に長時間を要する等の問題がある。
【０００５】
【発明が解決しようとする課題】
本発明は、水系工業用脱脂洗浄剤の液管理を短時間に、かつ正確に行うことができる方法を提供することを目的とする。
【０００６】
【課題を解決するための手段】
本発明者らは前記問題を解決すべく、鋭意検討を重ねた結果、被洗浄物から油脂類を洗浄除去するに従って水系工業用脱脂洗浄剤中に含まれる油脂類を、難水溶性溶剤により抽出し、当該難水溶性溶剤の屈折率を測定すれば、予め求めておいた検量線から、当該洗浄剤中の油分濃度を算出することができることを見出した。本発明は、かかる新たな知見に基づいて完成したものである。
【０００７】
すなわち、本発明は、非イオン性またはイオン性の界面活性剤を含有してなる水系工業用脱脂洗浄剤により、油脂類の付着している被洗浄物から油脂類を洗浄除去する際に、当該水系工業用脱脂洗浄剤中に含まれてくる油脂類の濃度により当該水系工業用脱脂洗浄剤の液管理をする方法であって、当該水系工業用脱脂洗浄剤中に含まれる油脂類の濃度を、当該水系工業用脱脂洗浄剤の一部に所定量の難水溶性溶剤を添加して油脂類を抽出した後、当該油脂類を抽出した難水溶性溶剤の屈折率から求めることを特徴とする水系工業用脱脂洗浄剤の液管理方法に関する。
【０００８】
本発明で使用される水系工業用脱脂洗浄剤は、非イオン性またはイオン性の界面活性剤を含有してなる水系工業用脱脂洗浄剤であり、通常、該洗浄剤中における当該界面活性剤の含有量は、０．０１〜５０重量％程度、好ましくは０．１〜１０重量％である。
【０００９】
非イオン性界面活性剤の具体例としては、ポリオキシアルキレンアルキル（アルキル基の炭素数６以上）エーテル、ポリオキシアルキレンフェノールエーテル、ポリオキシアルキレンアルキルフェノールエーテルなどのポリアルキレングリコールエーテル型非イオン性界面活性剤；ポリアルキレングリコールモノエステル、ポリアルキレングリコールジエステルなどのポリアルキレングリコールエステル型非イオン性界面活性剤；脂肪酸アミドのアルキレンオキサイド付加物；ソルビタン脂肪酸エステル、ショ糖脂肪酸エステルなどの多価アルコール型非イオン性界面活性剤；脂肪酸アルカノールアミド、ポリオキシアルキレンアルキルアミンなどをあげることができる。これら非イオン性界面活性剤は１種を単独でまたは２種以上を適宜に選択して組み合わせて使用できる。なお、前記アルキレンとは、エチレン、プロピレンまたはブチレンをいい、ポリオキシアルキレンとはポリオキシエチレン、ポリオキシプロピレン、ポリオキシブチレンまたはこれらが共重合したものをいう。
【００１０】
イオン性の界面活性剤としては、高級アルコールの硫酸エステル塩、アルキル硫酸エステル塩、ポリオキシエチレンアルキル硫酸エステル塩などの各種公知の硫酸エステル系アニオン性界面活性剤；アルキルスルホン酸塩、アルキルベンゼンスルホン酸塩などの各種公知のスルホン酸塩系アニオン性界面活性剤；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リン酸エステル塩などのリン酸エステル系アニオン性界面活性剤；アルキル化アンモニウム塩、４級アンモニウム塩などのカチオン性界面活性剤；アミノ酸型、ベタイン型両性界面活性剤などの両性界面活性剤があげられる。
【００１１】
また、本発明の水系工業用脱脂洗浄剤中には、グリコールエーテル系化合物等の各種溶剤や、防錆剤、キレート剤等が水系工業用脱脂洗浄剤の５０重量％未満の範囲であれば含まれていてもよい。
【００１２】
本発明の液管理方法は、かかる水系工業用脱脂洗浄剤により油脂類の付着している被洗浄物から油脂類を洗浄除去した結果、当該水系工業用脱脂洗浄剤中に含まれてくる油脂類の濃度を測定することにより、洗浄剤の寿命（洗浄剤新液との交換時機）を決定しようとするものである。
【００１３】
本発明では水系工業用脱脂洗浄剤中に含まれてくる油脂類の濃度を測定するにあたり、まず当該水系工業用脱脂洗浄剤の一部を取り出し、これに所定量の難水溶性溶剤を添加して油脂類を抽出する。
【００１４】
難水溶性溶剤としては、油脂類への溶解性が良好であり、かつ油脂類と難水溶性溶剤自身の屈折率差が大きいものが好ましい。かかる難水溶性溶剤としては、たとえば、ｎ−ペンタン、ｎ−ヘキサン、ｎ−ヘプタン、ｎ−オクタン、ｎ−ノナン、ｎ−デカン、シクロペンタン、メチルシクロペンタン等の脂肪族または脂環族系溶剤；メチルイソブチルケトン、ジエチルケトン、ジイソプロピルケトン、ジイソブチルケトン、エチル−ｎ−ブチルケトン、メチル−ｎ−アミルケトン等のケトン系溶剤；ｎ−ブタノール、ｎ−ペンタノール、ｎ−ヘキサノール、ｎ−ヘプタノール、２−オクタノール、２−メチル−１−ブタノール、３−メチル−２−ブタノール、４−メチル−２−ペンタノール等のアルコール系溶剤；ジイソプロピルエーテル、エチル−ｔ−ブチルエーテル、ジブチルエーテル、エチルイソアミルエーテル、ジイソアミルエーテル、ジエチルアセタール、ビニルメチルエーテル、ビニルエチルエーテル等のエーテル系溶剤等があげられる。
【００１５】
また、一部取り出す水系工業用脱脂洗浄剤及びこれに添加する難水溶性溶剤の使用量は、検量線を作成する際に用いる水系工業用脱脂洗浄剤および難水溶性溶剤の使用量と同じであり、水系工業用脱脂洗浄剤の種類や被洗浄物の種類等により適宜に決定すればよい。通常、所定量の難水溶性溶剤とは、当該水系工業用脱脂洗浄剤１００重量部に対し、通常１〜１００重量部程度、好ましくは５〜４０重量部程度である。
【００１６】
次いで、油脂類を抽出した難水溶性溶剤の屈折率を測定する。詳しくは、ナトリウム光源より光を測定対象物である油脂類を抽出した難水溶性溶剤に照射し、該難水溶性溶剤を透過した光のナトリウムＤ線に対する屈折率（ｎD ）を測定する。屈折率は、測定対象物の濃度と相関関係にあり、屈折率から、予め作成した検量線により水系工業用脱脂洗浄剤に含まれる油脂類を算出することができる。なお、検量線は既知濃度の油脂類を含有する水系工業用脱脂洗浄剤から、所定量の難水溶性溶剤により油脂類を抽出した後、当該難水溶性溶剤について屈折率を測定して作成しておく。
【００１７】
こうした本発明の液管理方法は、水系工業用脱脂洗浄剤および被洗浄物から洗浄除去する油脂類の種類により検量線が異なるため、これらの種類を固定して使用することが必要となる。但し、これらを変動させる場合には適宜に検量線を補正することにより対処し得ることはもとよりである。また、液温によっても検量線との誤差が生ずるため、油脂類を抽出した難水溶性溶剤の屈折率の測定温度差は±５℃程度以内に調節するのが好ましい。
【００１８】
屈折計としては、特に制限はされず、公知各種の屈折計、例えばアッベ屈折計、プルフリッヒ屈折計、ホールワックス屈折計、アラゴ・レイリー・ハーバー・レーベ屈折計、ゼリー・フィッシャー屈折計などを適宜選択して使用できる。
【００１９】
そして、油脂類を抽出した難水溶性溶剤の屈折率により、当該水系工業用脱脂洗浄剤の液寿命の判断を行い新液との交換時機を決定する。液寿命の判断は、被洗浄物の洗浄条件、水系工業用脱脂洗浄剤の種類などにより変動するため一義的には決定し難いが、通常の洗浄条件下では油脂類の濃度０．５〜５重量％程度が上限とされる。
【００２０】
なお、被洗浄物としては、金属部品、非金属部品、電子部品、ガラス、レンズなどがあげられ、油脂類としては切削油等の一般に当該被洗浄物に付着しているものなどがあげられるが、特にこれらに制限されるものではない。
【００２１】
また、水系工業用脱脂洗浄剤により被洗浄物から油脂類を洗浄除去する手段は特に限定されず、各種公知の手段を採用でき、例えば、水系工業用脱脂洗浄剤に被洗浄物品を直接浸漬して洗浄する方法、該洗浄剤をスプレー装置を使用してフラッシュする方法、機械的手段によりブラッシングする方法、超音波洗浄方法、液中ジェット洗浄方法、揺動方法、直通式洗浄法（たとえば、直通式洗浄装置「ダイレクトパス」、荒川化学工業（株）製を用いる方法）などの各種方法を適宜に選択して採用することができる。
【００２２】
【発明の効果】
本発明によれば、水系工業用脱脂洗浄剤中の油分濃度を短時間で、正確に測定することができ、水系工業用脱脂洗浄剤の交換時機の液管理が容易である。
【００２３】
【実施例】
以下に、実施例をあげて本発明の液管理方法を説明する。
【００２４】
製造例１
ポリオキシエチレン（付加モル数７）ノニルエーテル７０重量部とポリオキシエチレン（付加モル数１２）ノニルエーテル３０重量部からなる混合物に水を加え、これら混合物（有効成分）の含有率が、１．０重量％の水系工業用脱脂洗浄剤を調製した。さらに、当該洗浄剤１００重量部に対して、別々に０．５重量部、１．０重量部、２．０重量部、３．０重量部、４．０重量部または５．０重量部の切削油（日本石油（株）製、「ユニカットＴＨ５」）を添加し、５０℃にて、ビーカー中で１０分間、高速撹拌し、油脂類を含有する水系工業用脱脂洗浄剤を調製した。
【００２５】
製造例２
ポリオキシエチレン（付加モル数７）ノニルエ−テル３０重量部とポリオキシエチレン（付加モル数１２）ノニルエ−テル１０重量部およびジエチレングリコ−ルモノイソプロピルエ−テル６０重量部からなる混合物に水を加え、これら混合物（有効成分）の含有率が、０．５重量％の工業用脱脂洗浄剤を調製した。さらに、当該洗浄剤１００重量部に対して、別々に０．５重量部、１．０重量部、２．０重量部、３．０重量部、４．０重量部または５．０重量部の切削油（日本石油（株）製、「ユニカットＴＨ５」）を添加し、５０℃にて、ビーカー中で１０分間、高速撹拌し、油脂類を含有する水系工業用脱脂洗浄剤を調製した。
【００２６】
実施例１
製造例１で調製した油脂類を含有する水系工業用脱脂洗浄剤５０重量部を試験管に計り取り、メチルイソブチルケトン２０重量部を添加後、約１分間よく振り、その後、試験管を室温まで冷却し、水系工業用脱脂洗浄剤とメチルイソブチルケトンを静置分離した。分離後、上層のメチルイソブチルケトン約１ｇ程度をスポイトてサンプリングし、簡易型屈折率計（荒川化学（株）製、「ＰＩＮＥＣＯＮ ＰＲ−１００」）にて、屈折率（糖度％換算値）を測定した。測定結果を表１に示す。
【００２７】
実施例２
製造例２で調製した油脂類を含有する水系工業用脱脂洗浄剤５０重量部を試験管に計り取り、ｎ−ヘキサン２０重量部を添加後、約１分間よく振り、その後、試験管を室温まで冷却し、水系工業用脱脂洗浄剤とｎ−ヘキサンを静置分離した。分離後、上層のｎ−ヘキサン約１ｇ程度をスポイトにてサンプリングし、簡易型屈折率計（荒川化学（株）製、「ＰＩＮＥＣＯＮ ＰＲ−１００」）にて、屈折率（糖度％換算値）を測定した。測定結果を表１に示す。
【００２８】
比較例１
製造例２で調製した油脂類を含有する水系工業用脱脂洗浄剤の約１ｇ程度をスポイトにてサンプリングし、簡易型屈折率計（荒川化学（株）製、「ＰＩＮＥＣＯＮ ＰＲ−１００」）にて、屈折率（糖度％換算値）を測定した。測定結果を表１に示す。
【００２９】
【表１】
実施例１または実施例２のようにして屈折率を測定すれば、表１の結果より検量線を作成でき、かかる検量線から水系工業用脱脂洗浄剤中に含まれる油脂類の濃度を求めることができ、水系工業用脱脂洗浄剤の液管理は容易である。しかし、比較例１のように水系工業用脱脂洗浄剤の屈折率をそのまま測定しても水系工業用脱脂洗浄剤中に含まれる油脂類の濃度を求めることはできず、水系工業用脱脂洗浄剤の液管理はできない。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a liquid management method for a water-based industrial degreasing detergent. Specifically, when using a water-based industrial degreasing detergent to wash the object to be cleaned, the water-based industrial degreasing detergent determines the concentration of the fats and oils contained in the water-based industrial degreasing detergent. The present invention relates to a method for liquid management of an industrial degreasing detergent.
[0002]
[Prior art]
When an industrial degreasing cleaner is used for an object to be cleaned to which oils and fats are adhered, the concentration of the fats and oils in the industrial degreasing cleaner is increased, which adversely affects cleaning properties. Therefore, it is necessary to manage the industrial degreasing detergent and replace the industrial degreasing detergent after a certain period of time. In particular, water-based industrial degreasing cleaning agents generally have a short cleaning life and frequent replacement of cleaning agents, and liquid management is important.
[0003]
Conventionally, as a method for liquid management of an industrial degreasing detergent, a method of obtaining the oil concentration in the detergent in a correlation with the refractive index by measuring the refractive index of the detergent is generally performed. It has been broken. However, the method using such a refractive index is an effective method for cleaning agents that can completely dissolve oils and fats, such as solvent-based or semi-aqueous cleaning agents. It is difficult to apply when fats and oils are cloudy and dispersed and exist in a non-homogeneous state like a cleaning agent.
[0004]
In addition, as a method for liquid management of a water-based industrial degreasing detergent, a method for measuring the pH of a water-based industrial degreasing detergent, a method for measuring electrical conductivity, a method for measuring nonvolatile components, and the like are generally performed. It has been broken. However, in the case of the method of measuring pH, the types of cleaning agents that can be measured are limited, and in the case of the method of measuring electric conductivity, there are problems that are easily affected by changes in the quality of the diluted water, In the case of the method for measuring the non-volatile content, there is a problem that the measurement takes a long time.
[0005]
[Problems to be solved by the invention]
An object of this invention is to provide the method of performing liquid management of the water-based industrial degreasing detergent in a short time and correctly.
[0006]
[Means for Solving the Problems]
As a result of intensive studies to solve the above problems, the present inventors have extracted fats and oils contained in water-based industrial degreasing detergents with a poorly water-soluble solvent as the fats and oils are washed and removed from the object to be washed. And when the refractive index of the said slightly water-soluble solvent was measured, it discovered that the oil concentration in the said cleaning agent was computable from the analytical curve calculated | required previously. The present invention has been completed based on such new findings.
[0007]
That is, the present invention provides a water-based industrial degreasing detergent containing a nonionic or ionic surfactant when the oils and fats are washed and removed from the object to be washed. This is a method for liquid management of the water-based industrial degreasing detergent according to the concentration of the fats and oils contained in the water-based industrial degreasing detergent, and the concentration of the oils and fats contained in the water-based industrial degreasing detergent is determined. In addition, a predetermined amount of a poorly water-soluble solvent is added to a part of the water-based industrial degreasing detergent to extract the fats and oils, and then obtained from the refractive index of the poorly water-soluble solvent from which the fats and oils are extracted. The present invention relates to a liquid management method for a water-based industrial degreasing detergent.
[0008]
The water-based industrial degreasing detergent used in the present invention is a water-based industrial degreasing detergent containing a nonionic or ionic surfactant, and usually the surfactant in the detergent. The content is about 0.01 to 50% by weight, preferably 0.1 to 10% by weight.
[0009]
Specific examples of nonionic surfactants include polyalkylene glycol ether type nonionic surfactants such as polyoxyalkylene alkyl (alkyl group having 6 or more carbon atoms) ether, polyoxyalkylene phenol ether, polyoxyalkylene alkylphenol ether, and the like. Agent: Polyalkylene glycol ester type nonionic surfactant such as polyalkylene glycol monoester and polyalkylene glycol diester; Alkylene oxide adduct of fatty acid amide; Polyhydric alcohol type nonion such as sorbitan fatty acid ester and sucrose fatty acid ester Surfactants; fatty acid alkanolamides, polyoxyalkylene alkylamines and the like. These nonionic surfactants can be used alone or in combination of two or more appropriately selected. The alkylene refers to ethylene, propylene, or butylene, and the polyoxyalkylene refers to polyoxyethylene, polyoxypropylene, polyoxybutylene, or a copolymer thereof.
[0010]
Examples of ionic surfactants include various known sulfate anionic surfactants such as sulfates, alkyl sulfates and polyoxyethylene alkyl sulfates of higher alcohols; alkyl sulfonates and alkyl benzene sulfonates. Various known sulfonate anionic surfactants such as salts; phosphate anionic surfactants such as alkyl phosphate ester salts, polyoxyethylene alkyl phosphate ester salts, and polyoxyethylene alkylphenyl phosphate ester salts Agents; cationic surfactants such as alkylated ammonium salts and quaternary ammonium salts; amphoteric surfactants such as amino acid type and betaine type amphoteric surfactants.
[0011]
In addition, the water-based industrial degreasing detergent of the present invention includes various solvents such as glycol ether compounds, rust preventives, chelating agents, etc., in the range of less than 50% by weight of the water-based industrial degreasing detergent. It may be.
[0012]
According to the liquid management method of the present invention, the fats and oils contained in the water-based industrial degreasing cleaner are obtained as a result of washing and removing the fats and oils from the object to be washed with the water-based industrial degreasing cleaner. The life of the cleaning agent (time for replacement with a new cleaning agent) is determined by measuring the concentration of the cleaning agent.
[0013]
In the present invention, when measuring the concentration of fats and oils contained in a water-based industrial degreasing detergent, first, a part of the water-based industrial degreasing detergent is taken out, and a predetermined amount of poorly water-soluble solvent is added thereto. Extract oils and fats.
[0014]
As the poorly water-soluble solvent, those having good solubility in fats and oils and a large refractive index difference between the fats and the poorly water-soluble solvent itself are preferable. Examples of such poorly water-soluble solvents include aliphatic or alicyclic solvents such as n-pentane, n-hexane, n-heptane, n-octane, n-nonane, n-decane, cyclopentane, and methylcyclopentane. Ketone solvents such as methyl isobutyl ketone, diethyl ketone, diisopropyl ketone, diisobutyl ketone, ethyl-n-butyl ketone, methyl-n-amyl ketone; n-butanol, n-pentanol, n-hexanol, n-heptanol, 2- Alcohol solvents such as octanol, 2-methyl-1-butanol, 3-methyl-2-butanol, 4-methyl-2-pentanol; diisopropyl ether, ethyl-t-butyl ether, dibutyl ether, ethyl isoamyl ether, diisoamyl Ether, diethyl acetal, Methyl ether, monoethyl ether and vinyl ethyl ether.
[0015]
In addition, the amount of water-based industrial degreasing detergent to be taken out and the amount of the poorly water-soluble solvent added to this are the same as the amount of water-based industrial degreasing agent and the slightly water-soluble solvent used when preparing the calibration curve. Yes, it may be determined appropriately depending on the type of water-based industrial degreasing detergent, the type of the object to be cleaned, and the like. Usually, the predetermined amount of the poorly water-soluble solvent is usually about 1 to 100 parts by weight, preferably about 5 to 40 parts by weight with respect to 100 parts by weight of the water-based industrial degreasing detergent.
[0016]
Next, the refractive index of the poorly water-soluble solvent from which the fats and oils are extracted is measured. Specifically, light is irradiated from a sodium light source to a poorly water-soluble solvent from which oils and fats that are measurement objects are extracted, and the refractive index (n D ) of the light transmitted through the poorly water-soluble solvent with respect to sodium D-line is measured. The refractive index has a correlation with the concentration of the measurement object, and the fats and oils contained in the water-based industrial degreasing detergent can be calculated from the refractive index using a calibration curve prepared in advance. The calibration curve was prepared by extracting fats and oils with a predetermined amount of poorly water-soluble solvent from an aqueous industrial degreasing detergent containing fats and oils of known concentration and then measuring the refractive index of the poorly water-soluble solvent. Keep it.
[0017]
In such a liquid management method of the present invention, the calibration curve differs depending on the type of degreased detergent for water-based industrial use and the type of fats and oils to be washed and removed from the object to be washed. Therefore, it is necessary to fix these types for use. However, when these are changed, it can be dealt with by correcting the calibration curve appropriately. In addition, since an error from the calibration curve also occurs depending on the liquid temperature, it is preferable to adjust the difference in the measured temperature of the refractive index of the poorly water-soluble solvent from which the fats and oils are extracted within about ± 5 ° C.
[0018]
The refractometer is not particularly limited, and various known refractometers such as an Abbe refractometer, a Pullrich refractometer, a hole wax refractometer, an Arago Rayleigh Harbor Lebe refractometer, and a jelly fisher refractometer are appropriately selected. Can be used.
[0019]
Based on the refractive index of the poorly water-soluble solvent from which the fats and oils are extracted, the life of the water-based industrial degreasing detergent is judged to determine the timing for replacement with a new solution. Judgment of the liquid life varies depending on the cleaning conditions of the object to be cleaned, the type of water-based industrial degreasing detergent, and the like, but it is difficult to determine uniquely, but under normal cleaning conditions, the concentration of fats and oils is 0.5 to 5 The upper limit is about% by weight.
[0020]
Examples of the object to be cleaned include metal parts, non-metal parts, electronic parts, glass, lenses, and the like. Examples of oils and fats include those generally attached to the object to be cleaned such as cutting oil. However, it is not particularly limited to these.
[0021]
The means for washing and removing fats and oils from the object to be cleaned with the water-based industrial degreasing detergent is not particularly limited, and various known means can be adopted, for example, the article to be cleaned is directly immersed in the water-based industrial degreasing detergent. Cleaning method, flushing the cleaning agent using a spray device, brushing by mechanical means, ultrasonic cleaning method, submerged jet cleaning method, rocking method, direct cleaning method (for example, direct cleaning method) Various methods such as a type cleaning apparatus “Direct Pass” and a method using Arakawa Chemical Industries, Ltd.) can be appropriately selected and employed.
[0022]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, the oil-component density | concentration in a water-system industrial degreasing detergent can be measured correctly in a short time, and the liquid management of the replacement | exchange time of a water-system industrial degreasing detergent is easy.
[0023]
【Example】
Hereinafter, the liquid management method of the present invention will be described with reference to examples.
[0024]
Production Example 1
Water was added to a mixture consisting of 70 parts by weight of polyoxyethylene (addition mole number 7) nonyl ether and 30 parts by weight of polyoxyethylene (addition mole number 12) nonyl ether, and the content of these mixtures (active ingredients) was 1. A 0% by weight aqueous industrial degreasing detergent was prepared. Furthermore, for 100 parts by weight of the cleaning agent, 0.5 parts by weight, 1.0 part by weight, 2.0 parts by weight, 3.0 parts by weight, 4.0 parts by weight or 5.0 parts by weight are separately provided. Cutting oil (manufactured by Nippon Oil Co., Ltd., “Unicut TH5”) was added, and the mixture was stirred at high speed for 10 minutes in a beaker at 50 ° C. to prepare a water-based industrial degreasing detergent containing fats and oils.
[0025]
Production Example 2
Water is added to a mixture consisting of 30 parts by weight of polyoxyethylene (added mole number 7) nonyl ether, 10 parts by weight of polyoxyethylene (added mole number 12) nonyl ether and 60 parts by weight of diethylene glycol monoisopropyl ether, An industrial degreasing detergent having a content of these mixtures (active ingredients) of 0.5% by weight was prepared. Furthermore, for 100 parts by weight of the cleaning agent, 0.5 parts by weight, 1.0 part by weight, 2.0 parts by weight, 3.0 parts by weight, 4.0 parts by weight or 5.0 parts by weight are separately provided. Cutting oil (manufactured by Nippon Oil Co., Ltd., “Unicut TH5”) was added, and the mixture was stirred at high speed for 10 minutes in a beaker at 50 ° C. to prepare a water-based industrial degreasing detergent containing fats and oils.
[0026]
Example 1
Weigh 50 parts by weight of the water-based industrial degreasing detergent containing fats and oils prepared in Production Example 1, add 20 parts by weight of methyl isobutyl ketone, shake well for about 1 minute, and then bring the test tube to room temperature. After cooling, the aqueous industrial degreasing detergent and methyl isobutyl ketone were allowed to stand and separate. After separation, about 1 g of methyl isobutyl ketone in the upper layer is sampled with a dropper, and the refractive index (sugar content% converted value) is measured with a simple refractometer (Arakawa Chemical Co., Ltd., “PINECON PR-100”). did. The measurement results are shown in Table 1.
[0027]
Example 2
Weigh 50 parts by weight of the aqueous industrial degreasing detergent containing the fats and oils prepared in Production Example 2, add 20 parts by weight of n-hexane, shake well for about 1 minute, and then bring the test tube to room temperature. After cooling, the water-based industrial degreasing detergent and n-hexane were allowed to stand and separate. After separation, about 1 g of n-hexane in the upper layer is sampled with a dropper, and the refractive index (sugar content% converted value) is measured with a simple refractometer (Arakawa Chemical Co., Ltd., “PINECON PR-100”). It was measured. The measurement results are shown in Table 1.
[0028]
Comparative Example 1
About 1 g of the water-based industrial degreasing detergent containing fats and oils prepared in Production Example 2 was sampled with a dropper, and a simple refractometer (“PINECON PR-100” manufactured by Arakawa Chemical Co., Ltd.) was used. The refractive index (sugar content% conversion value) was measured. The measurement results are shown in Table 1.
[0029]
[Table 1]
If the refractive index is measured as in Example 1 or Example 2, a calibration curve can be created from the results in Table 1, and the concentration of fats and oils contained in the water-based industrial degreasing detergent is obtained from the calibration curve. Therefore, liquid management of the water-based industrial degreasing detergent is easy. However, even if the refractive index of the water-based industrial degreasing detergent is directly measured as in Comparative Example 1, the concentration of the fats and oils contained in the water-based industrial degreasing detergent cannot be determined. Liquid management is not possible.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25018495A JP3651077B2 (en) | 1995-09-04 | 1995-09-04 | Liquid management method for water-based industrial degreasing cleaner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25018495A JP3651077B2 (en) | 1995-09-04 | 1995-09-04 | Liquid management method for water-based industrial degreasing cleaner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0972894A JPH0972894A (en) | 1997-03-18 |
| JP3651077B2 true JP3651077B2 (en) | 2005-05-25 |
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|---|---|---|---|
| JP25018495A Expired - Fee Related JP3651077B2 (en) | 1995-09-04 | 1995-09-04 | Liquid management method for water-based industrial degreasing cleaner |
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| JP (1) | JP3651077B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19820800C2 (en) | 1998-05-09 | 2001-06-28 | Henkel Kgaa | Automatic determination of the load of aqueous cleaning solutions with carbon-containing compounds |
| JP6849278B2 (en) | 2016-12-28 | 2021-03-24 | 花王株式会社 | Cleaning liquid for water-based ink |
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