JPS62184086A - Antifog agent - Google Patents

Abstract

PURPOSE:To enable the formation of a film exhibiting an excellent antifog effect even on a glass surface and a plastic surface having high repellency, by incorporating a polyhydric alcohol, a nonionic surfactant of the ethylene oxide type and an anionic surfactant of the fluorocarbon type or the dialkyl sulfosuccinate type. CONSTITUTION:An antifog agent can be obtained by incorporating a polyhydric alcohol, a nonionic surfactant of the ethylene oxide type and an anionic surfactant of the fluorocarbon type or the dialkyl sulfosuccinate type as active ingredients and dissolving the mixture thus obtd. in free water or water containing a solvent soluble therein. It is pref. that the polyhydric alcohol, the nonionic surfactant and the anionic surfactant be incorporated in a weight ratio of 5-10:5-10:0.5-1.5.

Description

Detailed Description of the Invention The present invention relates to an anti-slip agent that prevents fogging caused by condensed water on the surface of glass, plastic, etc., and an anti-fog agent that has an anti-fog effect even if the surface of glass, plastic, etc. is water repellent. Regarding drugs.

Conventionally, anti-fogging agents are used for glass of vehicles such as automobiles, windshield plastic of helmets, glasses, lenses, etc. (Various kinds of anti-fogging agents have been proposed, but these agents have been used to prevent these glasses and plastics from being treated with silicone, wax, or other water-repellent materials. If the surface becomes water repellent due to contamination or water repellency due to the influence of wax applied to the car body, etc., even if the above-mentioned anti-fogging agent is applied by spraying etc., the surface will not have excellent anti-fog properties. A clear film cannot be formed and fogging cannot be prevented.

In view of the above points, the inventors of the present invention have conducted various studies and found that a film that easily exhibits an excellent anti-fog effect not only on non-water repellent glass and plastic surfaces but also on highly water-repellent glass and plastic surfaces. The present invention was achieved by discovering something that forms the following. That is, the present invention uses a polyhydric alcohol, an ethylene oxide-based nonionic surfactant, and a fluorine-based or sulfosuccinic acid dialkyl ester-based anionic surfactant in combination, which is dissolved in water or a mixture of water and alcohol to a desired concentration. If this is applied to the desired anti-sprouting surface using an appropriate method, its anti-fogging effect will be extremely good and it will not leave any stains on the applied surface.The polyhydric alcohols include ethylene glycol,
There are hydrophilic compounds such as propylene glycol, polyethylene glycol, and glycerin, and seven types or a mixture of one or more types can be used.

Ethylene oxide nonionic surfactants include 012
Polyoxyethylene alkyl ether such as polyoxyethylene lauryl ether, polyoxyethylene heptyl ether, polyoxyethylene oleyl ~0
A polyoxyethylene alkyl ether to which approximately 7 to 2 moles of ethylene oxide have been added per mole of the secondary alcohol of No. 14, for example, Softanol 7θ, Softanol TAθ (both manufactured by Nippon Shokubai Chemical Co., Ltd., under the trade names of Ni, the former; The latter is commercially available under the trade name of 7 moles of ethylene oxide added to C13 alcohol, and the latter is obtained by adding 2 moles of ethylene oxide to C13 alcohol), or polyoxyethylene octylphenol ether (e.g. Triton and polyoxyethylene alkylphenol ethers such as polyoxyethylene nonylphenol ether (trade name, product name of S.A. Co., Ltd., containing about 2 to θ moles of ethylene oxide) and polyoxyethylene nonylphenol ether.

In addition, the above-mentioned fluorine-based anionic surfactants include Ct, for example, FTOP EF-/1, 2 (Tohoku Kasei K, K, trade name), pc-irg and PC-/3'l (all of which are sold by Sumitomo 3M). Some sulfosuccinic acid dialkyl ester-based anionic surfactants are commercially available under the names of Nyalol OP and Nyallol CP (both manufactured by Toho Chemical Industry Co., Ltd., i8i product name). There are other things that have been done.

The above polyhydric alcohol, nonionic surfactant, and anionic surfactant are selected individually or in combination of two or more, and the blending ratio of water or water and alcohol: nonionic surfactant: anionic surfactant is In weight ratio, j~
/θ:j~10:θ,j~1, 3 is often preferred. These compounded drugs are also soluble in water or water containing alcohols such as methanol, ethanol, isopropyl alcohol, and other water-soluble solvents. The drug concentration is often adjusted to about /θ to coj% (by weight).

If water containing a water-soluble solvent such as alcohol is used as the solution, the drying properties of the applied solution will be significantly improved. In this case, the concentration of the solvent in the solution is approximately 10-. About 2j% (weight) is preferable.

Next, some formulation examples of the present invention are shown in the following table.

(Margins below) As a result of spraying the anti-fogging agent of each formulation example above onto transparent glass and plastic surfaces treated with and without silicone water repellent, it was uniformly applied regardless of the presence or absence of water repellent and the strength of the water repellent. It was possible to obtain an excellent anti-fog effect in both cases.

The anti-fogging agent prepared as described above has a certain lifespan, for example, /θθmata, 2θθC...Sθθ mark...
It can be packed in cans, bottles, plastic containers with a sprayer, or in pressurized containers with propellants to be used for the window glass of automobiles and other vehicles, the windshield plastic of helmets, the lenses of glasses and camera lenses, and the windows of houses and other buildings. When it is necessary to prevent fogging caused by condensation of water droplets on glass, greenhouse plastic films, glass, etc., it can be easily sprayed to prevent fogging.In particular, it can be treated with silicone and other chemicals to make it water repellent, such as on the windshield plastic of helmets. Excellent anti-ohm effect was demonstrated on water-repellent transparent plastic surfaces, glass, etc., which have water repellency, such as automobile window glass contaminated by scratches, etc.

Claims (1)

[Scope of Claims] 1. A haze containing a polyhydric alcohol, an ethylene oxide nonionic surfactant, and a fluorine-based or sulfosuccinic acid dialkyl ester-based anionic surfactant as active ingredients, dissolved in water or water containing a water-soluble solvent. Inhibitor. 2. The blending weight ratio of polyhydric alcohol, nonionic surfactant, and anionic surfactant is 5 to 10:5 to 10:0.5
1.5.