JP4974315B2 - Anti-fogging agent - Google Patents

Anti-fogging agent Download PDF

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JP4974315B2
JP4974315B2 JP2001166221A JP2001166221A JP4974315B2 JP 4974315 B2 JP4974315 B2 JP 4974315B2 JP 2001166221 A JP2001166221 A JP 2001166221A JP 2001166221 A JP2001166221 A JP 2001166221A JP 4974315 B2 JP4974315 B2 JP 4974315B2
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water
weight
film
condensation
agent
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JP2002363546A (en
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村本孝允
阿部敏夫
野田幸雄
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Fumakilla Ltd
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Fumakilla Ltd
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Description

【0001】
【発明の属する技術分野】
本願発明の防曇剤は、窓ガラス、鏡、プラスチック又は金属等の表面に使用の際、洗浄性に優れ、透明均一な吸湿性の保持皮膜を形成せしめ、持続効力が大きい防曇剤に関するものである。
【0002】
【従来の技術】
ガラス、鏡、プラスチック、金属等の表面が高温高湿の場所又は温度や湿度差の大きい境界面等において使用すると、表面に空気中の水蒸気が細かい水滴となって表面に凝集し、結露を生じる。それに、対処するため、従来から曇りを防止する方法が種々提案されている。例えば、特公平7−30304号公報に記載されている皮膜を形成する乳化重合体及び非イオン界面活性剤を含有した防曇剤がある。この防曇剤はアクリル酸系のポリマー重合体皮膜の表面に界面活性剤が配位されて防曇性を付与するが、凝集水によって流し去られ易く、時間の経過とともに防曇効果が低下する。
また、塵埃や汚垢が付着しやすく、ガラス表面のアクリル酸系のポリマーの重合体皮膜が残存し、掃除がしづらく、ガラスの透視性が損なわれる。
【0003】
特開2001−11492号公報には界面活性剤と分子量10000〜50000のポリエーテル変性シリコーンとを含有した防曇性を有する液体洗浄剤組成物が開示されている。この液体洗浄剤組成物はガラス表面に吸湿性の皮膜を形成せしめることにより、凝集水分とガラス表面の接触角を小さくし、凝集水分が水滴とならずガラス表面を一様に濡らすようにして曇りや結露を防止する。
初期防曇性良好であるが、親水性物質を留める皮膜剤が無く、ガラス表面に対する付着力が弱いため、効果の持続性が短いといった欠点がある。
【0004】
【発明が解決しようとする課題】
本願発明は、洗浄性に優れ、透明均一な吸湿性の固形保持皮膜を形成せしめて、結露防止に優れ、帯電防止及び汚れ防止効果のある防曇剤を提供することである。
【0005】
【課題を解決するための手段】
上記目的を達成するために、本願発明は、水を添加するとゾル又はゲルを形成する天然ヘクトライトに類似した合成ヘクトライト少なくとも1種と、ポリエチレングリコールにウレタンを重合させた熱可塑性水溶性高分子、ポリオキシアルキレンアルキルエーテル、炭素数1〜5の低級アルコールを3.0〜80.0重量%、及びポリエチレンオキシド又はポリプロピレンオキシドのポリエーテルを側鎖又は両末端に導入した分子量500〜10000のポリエーテル変性シリコーン0.05〜8.0重量%、を含有することを特徴とする防曇剤である。
【0012】
そして、本願発明によれば、透明均一な吸湿性の固形保持皮膜を形成せしめて、結露防止に優れ、帯電防止及び汚れ防止の効果が良く、さらに洗浄効果を付与することも可能である。
【0017】
【発明の実施の形態】
本願発明は防曇剤に関し、窓ガラス、鏡、プラスチック、金属等の表面に使用の際、吸湿性の皮膜形成剤、シリコーン変性エーテル、湿潤性のある非イオン界面活性剤と水混和性の低級アルコールを含有し、洗浄性に優れ、透明均一な吸湿性の固形保持皮膜を形成せしめて、結露防止に優れ、凝集水の生成を抑え、持続効力を大きくするものである。さらに、前記吸湿性の皮膜形成剤としては僅かずつ水に溶解するが他の物質を保持固着し、帯電防止と汚れ防止効果のある透明な固化皮膜を形成するものである。
非溶解性皮膜形成剤を使用すると、付着状態で皮膜が残り、ガラスが汚れた時の洗浄が難しく、光の乱反射があり、透明性が悪くなる等の難点が生じる。
【0018】
前記吸湿性の皮膜形成剤の物質としては、合成シリカ類、高分子樹脂類である。また、前記シリコーン変性エーテルの物質としては、シリコーンポリエーテルの共重合体で水分散性、延展性、帯電防止性を有するものである。
さらに、前記湿潤性のある非イオン界面活性剤としては、HLB(親水親油バランスの略称)値8〜19の非イオン界面活性剤である物質である。
さらに、前記水混和性の低級アルコールとしては、炭素数1〜5の脂肪族アルコールである。
これら物質全てを任意に混合し持続効力が大きくなる組成物を見い出すことである。
【0019】
本願発明の防曇剤組成物は、ガラスの洗浄と防曇効果に寄与する非イオン界面活性剤と、結露を起こす凝集水分とガラス表面の接触角を小さくし、凝集水分が水滴とならずガラス表面を一様に濡らし水の膜を形成して曇りや結露を防止するシリコーン変性エーテルとを吸湿性皮膜形成剤に含有させ、窓ガラス、鏡、プラスチック、金属等の表面に塗布し、透明均一な固化保持皮膜を形成させ、凝集水分が大きく成長し結露を起こしにくくし、また、水分の付着を抑制し、凝集水の流下を抑えて持続効果を大きくし、結露を防止するものである。
【0020】
本願発明に用いるガラスの洗浄と防曇効果に寄与する湿潤性のある非イオン界面活性剤としては、そのHLB値8〜19、特に、HLB値10〜16が好ましい。使用量は0.05〜8.00重量%、特に、0.10〜5.00重量%が好ましい。単独又は2種以上のHLB値の異なる非イオン界面活性剤を組み合わせて使用することも可能である。界面活性剤を多く使用すると固化の保持皮膜形成が遅くなり、ガラス表面がべと付き、汚れ易くなり、透明性が悪くなる。また、凝縮水分が多量に流下するなどの問題点がある。
【0021】
このような非イオン界面活性剤としては、ポリオキシアルキレンアルキルエーテル、ポリオキシエチレンアルキルエーテル、ポリオキシエチレンアルキルアリルエーテル、ポリオキシエチレンドデシルフェニルエーテル、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脂肪酸ジエステル、ポリオキシエチレンポリオキシプロピレンプロックポリマー、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グリコール脂肪酸エステル、ポリオキシエチレンラウリルエーテル、ポリオキシエチレンオレイルエーテル、ポリオキシエチレンオレイン酸エステル、ポリオキシエチレンノニルフェニルエーテル、ポリオキシエチレンオクチルフェニルエーテル、ポリオキシエチレンアルキルフェニルエーテル等が挙げられる。
【0022】
その中でも、ポリオキシアルキレンアルキルエーテル、ポリオキシエチレンアルキルエーテル、ポリオキシエチレンアルキルアリルエーテル、ポリオキシエチレンドデシルフェニルエーテルが好ましい。
【0023】
本願発明における結露を起こす凝集水分とガラス表面の接触角を小さくし、表面張力を低下させ、凝集水分が水滴とならず、ガラス表面を一様に濡らし水の膜を形成して曇りや結露を防止し、また、水分散性、延展性、帯電防止性を有するシリコーン変性エーテルとしては、ポリエチレンオキシドやポリプロピレンオキシド等のポリエーテルを側鎖又は両末端に導入したポリエーテル変性シリコーンである。分子量は500〜10000のものであり、次の一般式で示す。
【0024】
【化1】

Figure 0004974315
【0025】
本願発明に用いるポリエーテル変性シリコーンの配合量は、組成物全量に対して0.05〜80重量%、好ましくは、0.1〜5.0重量%である。
また、ポリエーテル変性シリコーンは単独又は2種以上組み合わせて使用することができる。
【0026】
本願発明に用いる非イオン界面活性剤とポリエーテル変性シリコーンを包含して、低吸湿性で強靱な固化皮膜を形成する物質としては、架橋構造体のウレタンエラストマーを、水中に分散させた水系ウレタン樹脂、ポリアルキレンオキサイド系の熱可塑性を有するノニオン型の吸水性樹脂、ポリエチレングリコールにウレタンを重合させた熱可塑性水溶性高分子、水を添加するとゾル又はゲルを形成する天然ヘクトライトに類似した合成ヘクトライト、ポリビニールアルコール、カルボキシメチルセルロース等が好ましい。
【0027】
本願発明に用いる皮膜形成をする物質の配合量は、組成物全量に対して0.05〜10.0重量%、好ましくは、0.1〜5.0重量%である。皮膜形成をする物質が0.05%未満であると皮膜形成が弱く、非イオン界面活性剤とポリエーテル変性シリコーンの固着が悪く、凝集水分によって流水して防曇効果が短くなる。また、10%以上になると、溶液の粘性が高くなり、均一に薄い塗布ができず、光の乱反射が起こり透明度が悪くなり、皮膜の固化が遅くなり、好ましくない。また、皮膜形成物質は単独又は2種以上組合わせて使用することが可能であるが、必要な皮膜の硬さ、固化速度等を考慮して選択、組合せをしなければならない。
【0028】
本願発明に用いる低級アルコールは、炭素数1〜5の脂肪族アルコールである。これを配合することにより、組成物質の溶解を助け、塗布後の乾燥を速めて皮膜形成を速くし、塵埃や汚垢が付着しにくくする。
低級アルコールとしては、メチルアルコール、エチルアルコール、n−プロピルアルコール、イソプロピルアルコール、ブチルアルコール、アミールアルコール等が好ましい。
【0029】
本願発明に用いる低級アルコールの配合量は、組成物全量に対して3.0〜80.0重量%、好ましくは、5.0〜30.0重量%である。また、低級アルコールは単独又は2種以上組合せて使用することができる。
【0030】
本願発明である防曇剤の各成分の配合割合は特に限定されるものではないが、1例を挙げると、吸湿性のある皮膜形成剤0.05〜10.0重量%、ポリエーテル変性シリコーン0.05〜8.0重量%、湿潤性のある非イオン界面活性剤0.05〜8.0重量%、水混和性の低級アルコール3.0〜80.0重量%である
【0031】
本願発明の防曇剤には、他の補助剤を添加することも可能である。これらの補助剤としては防かび防腐剤及び殺菌剤、消臭剤、香料等が使用される。
【0032】
本願発明の防曇剤組成物の保存安定性に寄与する防かび防腐剤及び殺菌剤としては、従来公知のものは全て使用でき、特定のものに限定されない。具体的には、安息香酸ナトリウム、パラオキシ安息香酸エチル、パラオキシ安息香酸ブチル、パラオキシ安息香酸プロピル、パラオキシ安息香酸イソブチル、プロピオン酸ナトリウム、チアベンダゾール、イソチアゾロン、ソルビン酸カリウム等が挙げられる。
殺菌剤としては、グルコン酸クロルヘキシジン、イソプロピルメチルフェノール、チモール,o−フェニルフェノール、塩化ベンザルコニウム、塩化ベンゼトニウム、塩化セチルピリジニウム、ヒノキチオール、塩化リゾチーム、ε−ポリリシン、トリクロサン、グレープフルーツ種子抽出物、カラシ抽出物「ワサオーロ」等が挙げられる。
【0033】
消臭剤としては、モウソウチク抽出物、緑茶抽出エキス、長鎖ベタイン化合物、柿抽出液の総称型タンニンを主成分とした消臭剤、数種の植物エキスを混入した植物系特殊消臭剤等が挙げられる。
【0034】
香料としては、フルーティー調、フローラル調、シトラス調、ウッディー調、フレッシュノート調、ミックスフレーバ調、グリーン調、ミント調等が挙げられる。
【0035】
防カビ防腐剤及び殺菌剤、消臭剤、香料の含有量は、各効果を維持し、安全性及び良好な経済性を得る観点から、防曇剤組成物中に防カビ防腐剤及び殺菌剤0.001〜10%、好ましくは0.003〜5.00重量%が望ましく、消臭剤0.05〜15重量%、好ましくは0.1〜10重量%が望ましく、香料0.001〜10重量%、好ましくは0.01〜5重量%が望ましい。
各種補助剤の防曇剤組成物中の含有割合は有効成分の種類やその目的、方法等により任意に設定できるものとし、何等制限されない。
本願発明の防曇剤は、窓ガラス、鏡、プラスチック又は金属等の表面に使用の際に、洗浄性、結露による防曇性を重視する場合には非イオン界面活性剤を含有させる。結露水を少なくさせる場合には非イオン界面活性剤を使用しない処方が好ましく、目的に応じて使い分ける。
【0036】
防曇剤の含浸体として、樹脂、パルプ、綿等の単一素材、又は混合剤の不織布、紙、布、スポンジ等であり、防曇剤を含浸保持し、窓ガラス、鏡、プラスチック又は金属等の表面に使用し、塗布面の汚れを吸着し、洗浄しながら、透明均一に塗布できる材料であれば良い。また、含浸体から構成素材が剥離され、塗布面に付着することで汚さない素材であれば全て使用可能であり、何等制限しない。
防曇剤の含浸体を装着させる塗布具として、均一に塗り延ばし、迅速かつ簡便に処理することを可能とせしめるものである。例えば、片手でも処理が可能な形状を有するスポンジ、発泡スチロール、ゴム、樹脂、不織布等である。
【0037】
<実験例1>
表1に示す物質の配分量による防曇剤で試験を行った。
【0038】
【表1】
Figure 0004974315
【0039】
防曇効果及び結露防止効果
試験方法 (図1参照のこと。)
1.充分に乾燥させたガラス水層の1つの表面に、結露防止剤を全面に一定量塗布し、その後塗布面を室温にて約1時間放置し、完全に乾燥させ試験に供した。
2.水層を室温25℃、湿度70%恒温恒湿内に移動させ、予め15℃に調節しておいた水道水をほぼ満水となるように水槽内に注いだ。
3.水槽内に冷却器を投入した水温を15℃に保ち、水槽表面に人工的に結露を発生させた。
4.試験開始から経時的に目視にて、防曇効果を確認した。また、ガラス表面に発生した結露を水槽下部に設置したビーカー内に溜め、結露量を測定した。
表2に示す防曇効果及び表3に示す結露防止効果を得た。
【0040】
【表2】
Figure 0004974315
【0041】
【表3】
Figure 0004974315
【0042】
考察
防曇剤を塗布した水槽表面には、表2に示すように、非イオン界面活性剤を含有した実施例1は結露(水滴及び曇り)が240分経過しても全く発生せず、360分経過しても結露がほとんど発生していない。しかし、非イオン界面活性剤を混入していない比較例3及び比較例4の防曇性は良くない。
また、防曇剤を塗布した水槽表面に発生した結露を水槽下部に設置したビーカー内に溜めた結露量は、表3に示すように実施例1は比較例1、比較例2、比較例5に比べて少ない。また、非イオン界面活性剤を混入していない比較例3及び比較例4は結露水の量大変少なくなる。
図2は表3の結露防止効果をグラフで示したものである。
【0043】
<実験例2>
試験方法
15cm×20cmのガラス板表面に、液剤をムラにならないように全面に塗布し後、完全に乾燥させた。5℃の冷蔵庫内にて10分間冷却させた後、室温45℃、湿度75%の恒温恒湿内に7分間放置し、肉眼にて結露の発生状況を確認した。
この一連の操作を、ガラス表面に結露が発生するまで繰り返しおこなった。
【0044】
考察
実施例1においては、表4に示すように、24回で、やっと、ガラス表面に結露が発生した。
【0045】
【表4】
Figure 0004974315

【図面の簡単な説明】
【図1】防曇効果及び結露防止効果を調べるための試験装置である。
【図2】表3の結露防止効果のグラフである。[0001]
BACKGROUND OF THE INVENTION
The anti-fogging agent of the present invention relates to an anti-fogging agent that has excellent detergency when used on the surface of a window glass, mirror, plastic, metal, etc., forms a transparent and uniform hygroscopic holding film, and has a long lasting effect. It is.
[0002]
[Prior art]
If the surface of glass, mirror, plastic, metal, etc. is used in a place with high temperature and high humidity, or a boundary surface with a large temperature or humidity difference, water vapor in the air forms fine water droplets on the surface and condenses on the surface, causing condensation. . In order to cope with this, various methods for preventing fogging have been proposed. For example, there is an antifogging agent containing an emulsion polymer forming a film and a nonionic surfactant described in JP-B-7-30304. This anti-fogging agent provides anti-fogging properties by coordinating a surfactant on the surface of an acrylic acid polymer polymer film, but is easily washed away by coagulated water, and the anti-fogging effect decreases with the passage of time. .
Further, dust and dirt are likely to adhere, and a polymer film of an acrylic acid polymer on the glass surface remains, which makes it difficult to clean and impairs the transparency of the glass.
[0003]
Japanese Patent Application Laid-Open No. 2001-11492 discloses a liquid detergent composition having an antifogging property containing a surfactant and a polyether-modified silicone having a molecular weight of 10,000 to 50,000. This liquid detergent composition forms a hygroscopic film on the glass surface, thereby reducing the contact angle between the aggregated moisture and the glass surface, and the aggregated moisture does not form water droplets and uniformly wets the glass surface. And prevent condensation.
Although the initial antifogging property is good, there is a drawback in that the durability of the effect is short because there is no film agent that retains the hydrophilic substance and the adhesion to the glass surface is weak.
[0004]
[Problems to be solved by the invention]
An object of the present invention is to provide an antifogging agent that is excellent in detergency, forms a transparent and uniform hygroscopic solid retention film, is excellent in prevention of condensation, and has antistatic and antifouling effects.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a thermoplastic water-soluble polymer obtained by polymerizing urethane with polyethylene glycol and at least one synthetic hectorite similar to natural hectorite that forms a sol or gel when water is added. , Polyoxyalkylene alkyl ether, 3.0 to 80.0% by weight of a lower alcohol having 1 to 5 carbon atoms, and a polyoxyethylene having a molecular weight of 500 to 10000 in which a polyether of polyethylene oxide or polypropylene oxide is introduced into a side chain or both ends. An antifogging agent comprising 0.05 to 8.0% by weight of ether-modified silicone.
[0012]
According to the present invention, it is possible to form a transparent and uniform hygroscopic solid-holding film, which is excellent in prevention of dew condensation, has good antistatic and antifouling effects, and can provide a cleaning effect.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
The present invention relates to an antifogging agent, and when used on the surface of a window glass, mirror, plastic, metal, etc., a hygroscopic film-forming agent, a silicone-modified ether, a wettable nonionic surfactant and a water-miscible lower agent. It contains alcohol, is excellent in detergency, and forms a transparent and uniform hygroscopic solid-holding film, is excellent in preventing condensation, suppresses the formation of condensed water, and increases the sustained effect. Further, the hygroscopic film-forming agent dissolves in water little by little, but other substances are retained and fixed to form a transparent solid film having antistatic and antifouling effects.
When an insoluble film-forming agent is used, the film remains in an attached state, and it is difficult to clean the glass when it is dirty, and there are problems such as irregular reflection of light and poor transparency.
[0018]
Examples of the hygroscopic film forming agent include synthetic silicas and polymer resins. The silicone-modified ether substance is a silicone polyether copolymer having water dispersibility, spreadability, and antistatic properties.
Furthermore, the nonionic surfactant having wettability is a substance that is a nonionic surfactant having an HLB (abbreviation of hydrophilic / lipophilic balance) value of 8 to 19.
Furthermore, the water-miscible lower alcohol is an aliphatic alcohol having 1 to 5 carbon atoms.
The idea is to find a composition that increases the long-lasting efficacy by arbitrarily mixing all these substances.
[0019]
The anti-fogging agent composition of the present invention comprises a nonionic surfactant that contributes to glass cleaning and anti-fogging effect, and reduces the contact angle between the condensed water causing condensation and the glass surface, so that the condensed water does not form water droplets and glass. Silicone-modified ether that wets the surface uniformly and forms a water film to prevent fogging and condensation is contained in a hygroscopic film-forming agent and applied to the surface of window glass, mirrors, plastics, metals, etc. A solidified holding film is formed so that the condensed water grows large and does not easily cause dew condensation. Further, the adhesion of moisture is suppressed, the flow of the aggregated water is suppressed, the sustaining effect is increased, and the dew condensation is prevented.
[0020]
The nonionic surfactant having wettability that contributes to the glass cleaning and antifogging effect used in the present invention preferably has an HLB value of 8 to 19, particularly an HLB value of 10 to 16. The amount used is preferably 0.05 to 8.00% by weight, particularly preferably 0.10 to 5.00% by weight. It is also possible to use alone or in combination of two or more nonionic surfactants having different HLB values. If a large amount of a surfactant is used, the formation of a solidified holding film is delayed, the glass surface becomes sticky, easily becomes dirty, and the transparency is deteriorated. In addition, there is a problem that a large amount of condensed water flows down.
[0021]
Examples of such nonionic surfactants include polyoxyalkylene alkyl ether, polyoxyethylene alkyl ether, polyoxyethylene alkyl allyl ether, polyoxyethylene dodecyl phenyl ether, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene fatty acid diester, Polyoxyethylene polyoxypropylene block polymer, polyoxyethylene fatty acid ester, polyoxyethylene glycol fatty acid ester, polyoxyethylene lauryl ether, polyoxyethylene oleyl ether, polyoxyethylene oleic acid ester, polyoxyethylene nonylphenyl ether, polyoxy Examples include ethylene octyl phenyl ether and polyoxyethylene alkyl phenyl ether.
[0022]
Among these, polyoxyalkylene alkyl ether, polyoxyethylene alkyl ether, polyoxyethylene alkyl allyl ether, and polyoxyethylene dodecyl phenyl ether are preferable.
[0023]
In the present invention, the contact angle between the condensed water causing the condensation and the glass surface is reduced, the surface tension is lowered, the aggregated water does not become water droplets, the glass surface is uniformly wetted to form a water film, and fog and condensation are formed. The silicone-modified ether having water dispersibility, spreadability, and antistatic property is a polyether-modified silicone in which a polyether such as polyethylene oxide or polypropylene oxide is introduced into the side chain or both ends. The molecular weight is 500 to 10,000 and is represented by the following general formula.
[0024]
[Chemical 1]
Figure 0004974315
[0025]
The blending amount of the polyether-modified silicone used in the present invention is 0.05-8 . 0% by weight, preferably 0.1 to 5.0% by weight.
Polyether-modified silicones can be used alone or in combination of two or more.
[0026]
As a substance that includes a nonionic surfactant and a polyether-modified silicone used in the present invention to form a tough solid film with low hygroscopicity, a water-based urethane resin in which a urethane elastomer having a crosslinked structure is dispersed in water , Polyalkylene oxide-based thermoplastic nonionic water-absorbent resin, thermoplastic water-soluble polymer obtained by polymerizing urethane in polyethylene glycol, synthetic hectoid similar to natural hectorite that forms sol or gel when water is added Light, polyvinyl alcohol, carboxymethyl cellulose and the like are preferable.
[0027]
The compounding quantity of the substance which forms the film used for this invention is 0.05 to 10.0 weight% with respect to the composition whole quantity, Preferably, it is 0.1 to 5.0 weight%. If the amount of the substance that forms the film is less than 0.05%, the film formation is weak, the non-ionic surfactant and the polyether-modified silicone are not firmly fixed, and the antifogging effect is shortened by running with coagulated water. On the other hand, if it is 10% or more, the viscosity of the solution becomes high, a uniform thin coating cannot be formed, irregular reflection of light occurs, the transparency deteriorates, and the solidification of the film becomes slow, which is not preferable. In addition, the film forming substances can be used alone or in combination of two or more kinds, but they must be selected and combined in consideration of the required film hardness, solidification speed and the like.
[0028]
The lower alcohol used in the present invention is an aliphatic alcohol having 1 to 5 carbon atoms. By blending this, it helps dissolution of the composition material, speeds up drying after coating, speeds up film formation, and makes it difficult for dust and dirt to adhere.
As the lower alcohol, methyl alcohol, ethyl alcohol, n-propyl alcohol, isopropyl alcohol, butyl alcohol, amir alcohol and the like are preferable.
[0029]
The compounding quantity of the lower alcohol used for this invention is 3.0-80.0 weight% with respect to the composition whole quantity, Preferably, it is 5.0-30.0 weight%. Moreover, a lower alcohol can be used individually or in combination of 2 or more types.
[0030]
The blending ratio of each component of the antifogging agent according to the present invention is not particularly limited. For example, 0.05 to 10.0% by weight of a hygroscopic film forming agent, polyether-modified silicone 0.05 to 8.0% by weight, 0.05 to 8.0% by weight of a wettable nonionic surfactant, and 3.0 to 80.0% by weight of a water-miscible lower alcohol .
[0031]
It is possible to add other auxiliary agents to the antifogging agent of the present invention. As these adjuvants, fungicides, fungicides, deodorants, fragrances and the like are used.
[0032]
As the antifungal preservative and bactericidal agent contributing to the storage stability of the antifogging composition of the present invention, all conventionally known antifungal agents can be used and are not limited to specific ones. Specific examples include sodium benzoate, ethyl paraoxybenzoate, butyl paraoxybenzoate, propyl paraoxybenzoate, isobutyl paraoxybenzoate, sodium propionate, thiabendazole, isothiazolone, potassium sorbate and the like.
Bactericides include chlorhexidine gluconate, isopropylmethylphenol, thymol, o-phenylphenol, benzalkonium chloride, benzethonium chloride, cetylpyridinium chloride, hinokitiol, lysozyme chloride, ε-polylysine, triclosan, grapefruit seed extract, mustard extract Examples include the “Wasaolo”.
[0033]
Deodorants include Moso bamboo extract, green tea extract, long-chain betaine compound, deodorant based on generic tannins of persimmon extract, plant special deodorant mixed with several plant extracts, etc. Is mentioned.
[0034]
Examples of the fragrances include fruity, floral, citrus, woody, fresh note, mixed flavor, green and mint.
[0035]
Antifungal preservative and fungicide, deodorant, and perfume content is maintained in the respective effects, from the viewpoint of obtaining safety and good economy, antifungal preservative and fungicide in the antifogging composition 0.001 to 10%, preferably 0.003 to 5.00% by weight is desirable, deodorant 0.05 to 15% by weight, preferably 0.1 to 10% by weight, and perfume 0.001 to 10% % By weight, preferably 0.01-5% by weight.
The content of the various auxiliary agents in the antifogging agent composition can be arbitrarily set according to the type of active ingredient, its purpose, method, etc., and is not limited at all.
The antifogging agent of the present invention contains a nonionic surfactant when importance is attached to the antifogging property due to detergency and condensation when used on the surface of a window glass, mirror, plastic, metal or the like. In the case of reducing the amount of condensed water, a prescription that does not use a nonionic surfactant is preferable, and it is properly used according to the purpose.
[0036]
As an impregnated body of an antifogging agent, it is a single material such as resin, pulp, cotton, etc., or a nonwoven fabric of paper, cloth, sponge, etc., impregnated and held with an antifogging agent, window glass, mirror, plastic or metal Any material can be used as long as it can be applied to the surface of the coating, adsorbing dirt on the coated surface, and being applied uniformly and transparently while washing. Further, any material can be used as long as it is a material that does not become dirty by peeling off the constituent material from the impregnated body and adhering to the coated surface, and there is no limitation.
As an applicator to which an antifogging agent impregnated body is attached, it is possible to spread it uniformly and to process it quickly and easily. For example, sponge, foamed polystyrene, rubber, resin, non-woven fabric and the like having a shape that can be processed with one hand.
[0037]
<Experimental example 1>
Tests were conducted with antifogging agents according to the distribution amounts of the substances shown in Table 1.
[0038]
[Table 1]
Figure 0004974315
[0039]
Anti-fogging effect and dew condensation prevention test method (See Fig. 1)
1. A predetermined amount of the anti-condensation agent was applied to one surface of the glass water layer that had been sufficiently dried, and then the coated surface was allowed to stand at room temperature for about 1 hour, completely dried and subjected to the test.
2. The aqueous layer was moved to room temperature 25 ° C. and humidity 70% constant temperature and humidity, and tap water previously adjusted to 15 ° C. was poured into the water tank so as to be almost full.
3. The water temperature at which the cooler was put in the water tank was maintained at 15 ° C., and condensation was artificially generated on the surface of the water tank.
4). The anti-fogging effect was confirmed visually over time from the start of the test. Moreover, the condensation which generate | occur | produced on the glass surface was stored in the beaker installed in the lower part of the water tank, and the amount of condensation was measured.
The antifogging effect shown in Table 2 and the dew condensation preventing effect shown in Table 3 were obtained.
[0040]
[Table 2]
Figure 0004974315
[0041]
[Table 3]
Figure 0004974315
[0042]
Discussion As shown in Table 2, Example 1 containing a nonionic surfactant does not generate any condensation (water droplets and cloudiness) after 240 minutes on the surface of the water tank coated with the antifogging agent. Condensation hardly occurs even after a minute. However, the antifogging properties of Comparative Example 3 and Comparative Example 4 in which the nonionic surfactant is not mixed are not good.
In addition, as shown in Table 3, the amount of condensation accumulated in the beaker installed in the lower part of the water tank on the surface of the water tank to which the antifogging agent was applied is shown in Example 1, Comparative Example 1, Comparative Example 2, and Comparative Example 5 Less than In Comparative Examples 3 and 4 in which the nonionic surfactant is not mixed, the amount of condensed water is very small.
FIG. 2 is a graph showing the effect of preventing condensation in Table 3.
[0043]
<Experimental example 2>
Test Method A liquid agent was applied to the entire surface of a 15 cm × 20 cm glass plate so as not to become uneven, and then completely dried. After cooling in a refrigerator at 5 ° C. for 10 minutes, it was left in a constant temperature and humidity at room temperature of 45 ° C. and humidity of 75% for 7 minutes, and the occurrence of condensation was confirmed with the naked eye.
This series of operations was repeated until condensation occurred on the glass surface.
[0044]
Discussion In Example 1, as shown in Table 4, condensation was finally generated on the glass surface after 24 times.
[0045]
[Table 4]
Figure 0004974315

[Brief description of the drawings]
FIG. 1 is a test apparatus for examining an anti-fogging effect and a dew condensation preventing effect.
FIG. 2 is a graph showing the effect of preventing condensation in Table 3.

Claims (1)

水を添加するとゾル又はゲルを形成する天然ヘクトライトに類似した合成ヘクトライト少なくとも1種と、ポリエチレングリコールにウレタンを重合させた熱可塑性水溶性高分子、ポリオキシアルキレンアルキルエーテル、炭素数1〜5の低級アルコールを3.0〜80.0重量%、及びポリエチレンオキシド又はポリプロピレンオキシドのポリエーテルを側鎖又は両末端に導入した分子量500〜10000のポリエーテル変性シリコーン0.05〜8.0重量%、を含有することを特徴とする防曇剤。 At least one synthetic hectorite similar to natural hectorite that forms a sol or gel when water is added, a thermoplastic water-soluble polymer obtained by polymerizing urethane with polyethylene glycol, polyoxyalkylene alkyl ether, 1 to 5 carbon atoms Of a lower alcohol of 3.0 to 80.0% by weight, and a polyether-modified silicone having a molecular weight of 500 to 10000 in which a polyether of polyethylene oxide or polypropylene oxide is introduced into the side chain or both ends is 0.05 to 8.0% by weight. And an antifogging agent characterized by comprising:
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