JPH09104858A - Composition for preventing fouling from sticking - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the subject composition, comprising a hydrophilic substance having film-forming properties and a glycoside, capable of preventing hydrophilic or hydrophobic foulings from sticking to the surface of a substrate and readily washing and removing the foulings, excellent in safety and useful in the field of plastics, glass, etc. SOLUTION: This composition for preventing foulings from sticking comprises (A) a hydrophilic substance having film-forming properties such as soybean polysaccharides, a modified starch, dextrin, carboxymethyl cellulose or polyvinyl alcohol, (B) a glycoside [e.g. the one derived from a substance having a nonsaccharide part consisting essentially of a 1-18C (branched)(cyclo)alkyl group, (cyclo)alkenyl or alkynyl and a saccharide residue comprising 2-4 bonded glucose, mannose, galactose or glucosamine] and, as necessary, further (C) a surfactant.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antifouling composition, more specifically to an antifouling composition which prevents the adhesion of dirt to the surface of glass, plastic, etc. and is safe and easy to wash.

[0002]

2. Description of the Related Art Various base materials such as glass, plastic and metal are used for automobiles, railway vehicles, buildings and the like from the viewpoints of aesthetic appearance and imparting transparency. However, dirt such as dust adheres to the base material due to rainfall or the like, and if it is left for a long period of time, the dirt adheres to the base material and its removal becomes difficult.
Further, for example, when water comes into contact with glass, the alkaline component of the glass may be eluted, and the glass may have a scaly appearance, which may impair the aesthetic appearance. Further, due to rainfall or the like, a non-uniform water film is formed on the window glass of an automobile, which causes a distorted view. Therefore, there are various compositions and methods for preventing the substrate from being soiled.

The first is to make the surface of the substrate water repellent. For example, there is a composition in which an amino-modified silicone oil and one or more surfactants are contained in water and / or a water-soluble organic solvent. This is to make the glass surface water-repellent to prevent wetting and ensure a clear view. In addition, there is a method of applying and baking a solution containing a metal alkoxide and a substituted metal alkoxide in which a part of the alkoxyl group is substituted with a fluoroalkyl group by a predetermined method. This is intended to form a water-repellent film on the window glass of an automobile or the like.

Secondly, the surface of the substrate is made water and oil repellent. For example, there is a water-dispersible water repellent composition in which a silane compound is dispersed in a surfactant-containing polyhydric alcohol solution. This is a water and oil repellent that is excellent in water and oil repellency and does not contain a solvent that pollutes the environment.

Thirdly, the surface of the base material is made hydrophilic and oil repellent. For example, there are hydrophilic oil repellent treatment agents containing a fluorine-containing silane compound and a hydrophilic silane compound. This imparts stain resistance to the base material, and stains on the base material can be easily removed.

On the other hand, in order to prevent fogging of the base material, a glycoside is added to an active energy ray-curable resin composition containing a reactive hydrophilic component consisting of a monomer, an oligomer or a prepolymer having a hydrophilic group as an essential component. Some compositions include the body.

[0007]

The first means is effective in preventing the wetting of the surface of the base material and the formation of a water film, but it is difficult to wash, and the treatment step is complicated. There is. In the second means, it is possible to prevent both hydrophilic stains and lipophilic stains, but in the above example, the composition is an emulsion from the viewpoint of safety such as flammability, and the effect is not always sufficient to prevent stains. It cannot be said that there is. The third means is excellent in stain resistance and also excellent in removing stains on the substrate, but the manufacturing process is complicated and expensive.

Further, the above-mentioned three means have the complexity that it may be necessary to use a special solvent or the like, and the influence on the substrate must be examined. On the other hand, it is necessary to prevent fog in a composition containing a glycoside in an active energy ray-curable resin composition containing a reactive hydrophilic component composed of a monomer, an oligomer, or a prepolymer having a hydrophilic group as an essential component. It is possible, but it is difficult to prevent stains.

Therefore, according to the present invention, regardless of whether the stain is hydrophilic or lipophilic, the stain is prevented from adhering to the surface of the substrate, and the stain can be easily washed, and the stain to the substrate can be easily removed. It is an object of the present invention to provide a stain-preventing composition which has no influence and is highly safe.

[0010]

The inventors of the present invention have conducted extensive studies based on the above object, and as a result, have found that a substance that forms a hydrophilic film on the surface of a substrate and a substance that uniformly spreads the substance on the surface of the substrate. It has been found that the composition containing the material can uniformly form a hydrophilic film on the surface of the base material and prevent dirt from adhering to the surface of the base material. This membrane is hydrophilic, and stains attached to the membrane can be easily washed off with water or the like, regardless of whether it is hydrophilic or lipophilic. Further, it has no influence on the surface of the base material and is highly safe.

To achieve the above object, the invention according to claim 1 is a stain adhesion preventing composition comprising a hydrophilic substance capable of forming a film and a glycoside.

According to a second aspect of the present invention, in the stain adhesion preventing composition according to the first aspect, the hydrophilic substance having a film-forming ability is soybean polysaccharide, modified starch, dextrin, carboxymethyl cellulose, polyvinyl alcohol. A stain adhesion preventing composition mainly comprising one or a mixture of two or more selected from the group.

[0013] The invention according to claim 3 is the invention according to claim 1 or 2.
In the antifouling composition as described above, the non-sugar portion of the glycoside is a linear or branched alkyl group, alkenyl group, alkynyl group having 1 to 18 carbon atoms,
A stain adhesion preventing composition mainly comprising one or more selected from the group consisting of a cycloalkyl group and a cycloalkenyl group.

The invention according to claim 4 is the composition for preventing adhesion of stains according to any one of claims 1 to 3, wherein the non-sugar portion of the glycoside is a straight chain having an arbitrary carbon number of 12 to 16 carbon atoms. A stain adhesion preventing composition mainly comprising one or two or more selected from the group consisting of linear or branched alkyl groups.

A fifth aspect of the present invention is the stain-preventing composition according to any one of the first to fourth aspects, wherein the sugar residue of the glycoside is glucose or mannose or galactose or glucosamine or glucose, mannose or galactose. The antifouling composition is derived from glucosamine, which is derived from one or two or more selected from the group consisting of glucosamine and bonded in an arbitrary number of 2 to 4.

A sixth aspect of the present invention is the antifouling composition according to any one of the first to fifth aspects, which further comprises a surfactant.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION A hydrophilic film is formed on a substrate surface by incorporating a hydrophilic polymer that forms a hydrophilic film on the substrate surface and a glycoside that uniformly spreads the hydrophilic polymer on the substrate surface. It can be formed uniformly and it is possible to prevent dirt from adhering to the surface of the substrate.

That is, when dirt adheres to the surface of a base material such as glass, the adherence of dirt becomes strong over time, and it is often difficult to remove the dirt. By applying the coating to the surface of the base material, dirt adheres to the coating, not to the surface of the base material.
Moreover, since the film has neither water repellency nor oil repellency, dirt can adhere to the film regardless of whether it is hydrophilic or lipophilic. Moreover, since the film is hydrophilic, it can be easily washed with water or the like. Further, it has no influence on the surface of the base material and is highly safe. Furthermore, the film made of such a hydrophilic polymer is transparent and does not affect the color tone and gloss of the substrate.

The term "hydrophilic" means that it can be dissolved in water, and it is necessary that it has a polarity close to that of water and that the crystallinity of the substance is weak. In general, when the polarities of water are different from each other, it is generally insoluble, and even when the polarities of water and water are close to each other, when the crystallinity is good, the bonds between the molecules are strong and generally insoluble. . However, if it dissolves in water, it may be a poorly soluble substance that is difficult to dissolve, and if it is added to water it will be left alone and if mechanical stirring is necessary, it will be necessary to raise the temperature further It may be one that dissolves.

Of the hydrophilic substances, those having a low molecular weight generally have difficulty in forming a film, and therefore the hydrophilic substances usable in the present invention are mainly those having a high molecular weight. This polymeric hydrophilic substance may form a film only after adding a salt, for example.

Specifically, for example, alginic acid, carrageenan, agar, pectin, starch, dextrin, cellulose, locust bean gum, xanthan gum, guar gum, gum arabic, pullulan, curdlan, glue,
Natural polymers such as gelatin, collagen, casein and glycinin, semi-synthetic polymers such as methyl cellulose, hydroxyethyl cellulose, carboxymethyl cellulose, carboxymethyl starch, propylene glycol alginate, modified starch, polyvinyl alcohol,
Synthetic polymers such as polyvinylpyrrolidone are applicable. Alternatively, it may be a mixture of these polymer substances. Further, it may contain a substance irrelevant to the formation of the film as long as the formation of the film is not hindered. The hydrophilic polymer to be used can be selected from the above hydrophilic polymers in consideration of necessary strength of the film, adhesion to the surface of the substrate, solvent resistance, etc. Most preferably, soybean polysaccharide, modified starch, dextrin, carboxymethyl cellulose, polyvinyl alcohol, or a mixture thereof or a mixture thereof is mainly used. Further, the content of the hydrophilic polymer can be appropriately selected in consideration of the thickness and strength of the film. The hydrophilic polymer described above does not adversely affect the surface of the base material and is highly safe.

However, although the surface of the substrate such as glass is generally hydrophilic, the interfacial tension between the hydrophilic polymer solution and the substrate surface is high, and even if the hydrophilic polymer solution is applied to the substrate surface, it is uniform. Therefore, it is difficult to form a film having a predetermined thickness.
Therefore, it is necessary to use together a substance that lowers the interfacial tension and forms a uniform film.

Glycosides are effective in reducing the interfacial tension between the hydrophilic polymer solution and the surface of the substrate. Glycosides are sugars whose hemiacetal hydroxyl groups,
That is, in the cyclic isomers of sugars, it means a compound in which water is condensed between the hydroxyl group on the 1st carbon atom in aldose and the 2nd carbon atom in ketose and another substance, which is synonymous with glycoside.

The sugar residues of glycoside include monosaccharides such as glucose, galactose, mannose, fructose, glucosamine, galactosamine, xylose and arabinose, sucrose, lactose, trehalose, maltose, cellobiose, isomaltose, gentiobiose and laminaribiose. , Chitobiose, xylobiose, mannobiose, sophorose, maltotriose,
Maltotetraose, or starch, oligosaccharides such as a hydrolyzate of cellulose, and further, those derived from polysaccharides such as starch, cellulose, chitin, chitosan and the like, glucose, mannose or galactose or glucosamine or glucose, mannose. , One in which two or more kinds selected from the group consisting of galactose and glucosamine are bound in an arbitrary number of 2 to 4, and those derived from decrease the interfacial tension between the hydrophilic polymer solution and the substrate surface. It is particularly preferable for this.

The non-sugar portion constituting the glycoside is a group consisting of a linear or branched alkyl group, alkenyl group, alkynyl group, cycloalkyl group or cycloalkenyl group having 1 to 18 carbon atoms and having an arbitrary carbon number. It is preferable that one or more selected from the group is mainly used. Specific examples of the alkyl group, alkenyl group, alkynyl group, cycloalkyl group and cycloalkenyl group having 1 to 18 carbon atoms include methyl group, ethyl group, n-propyl group, n-butyl group and n-pentyl group. Group, n-hexyl group,
n-heptyl group, n-octyl group, n-nonyl group, n-
Decyl group, n-undecyl group, n-dodecyl group, n-tridecyl group, n-tetradecyl group, n-pentadecyl group, n-hexadecyl group, n-heptadecyl group, n-octadecyl group, isopropyl group, isopentyl group, neopentyl group Group, isohexyl group, 3-methylpentyl group,
2,2-dimethylbutyl group, 2,3-dimethylbutyl group, t-butyl group, 2-ethylhexyl group, 2-methylundecyl group, 3-methylundecyl group, 4-methylundecyl group, 5-methyl Undecyl group, 6-methylundecyl group, 2-ethyldecyl group, 3-ethyldecyl group,
4-ethyldecyl group, 5-ethyldecyl group, 2-propylnonyl group, 3-propylnonyl group, 4-propylnonyl group, 5-propylnonyl group, 2-butyloctyl group,
3-butyloctyl group, 2-methyltridecyl group, 3-
Methyltridecyl group, 4-methyltridecyl group, 5-methyltridecyl group, 6-methyltridecyl group, 7-methyltridecyl group, 2-ethyldodecyl group, 3-ethyldodecyl group, 4-ethyldodecyl group , 5-ethyldodecyl group, 6-ethyldodecyl group, 2-propylundecyl group, 3-propylundecyl group, 4-propylundecyl group, 5-propylundecyl group, 6-propylundecyl group, 2- Butyldecyl group, 3-butyldecyl group, 4
-Butyldecyl group, 5-butyldecyl group, 2-pentylnonyl group, 3-pentylnonyl group, 4-pentylnonyl group, 2-hexyloctyl group, 2-methylpentadecyl group, 3-methylpentadecyl group, 4-methyl Pentadecyl group, 5-methylpentadecyl group, 6-methylpentadecyl group, 7-methylpentadecyl group, 8-methylpentadecyl group, 2-ethyltetradecyl group, 3-ethyltetradecyl group, 4-ethyltetra Decyl group, 5-ethyltetradecyl group, 6-ethyltetradecyl group, 7-ethyltetradecyl group, 2-propyltridecyl group, 3-propyltridecyl group, 4-propyltridecyl group, 5-propyltridecyl group Group, 6-propyltridecyl group, 7-
Propyltridecyl group, 2-butyldodecyl group, 3-butyldodecyl group, 4-butyldodecyl group, 5-butyldodecyl group, 6-butyldodecyl group, 2-pentylundecyl group, 3-pentylundecyl group, 4 -Pentylundecyl group, 5-pentylundecyl group, 6-pentylundecyl group, 2-hexyldecyl group, 3-hexyldecyl group, 4-hexyldecyl group, 2-heptylnonyl group,
1-butenyl group, 1-pentenyl group, 1-hexenyl group, 1-heptenyl group, 1-octenyl group, 1-nonenyl group, 1-decenyl group, 3-methyl-1-butenyl group,
3-methyl-2-butenyl group, 2,3-dimethyl-2-
Butenyl group, 1-butynyl group, 1-pentynyl group, 1-
Hexynyl group, 1-heptynyl group, 1-octynyl group,
1-nonynyl group, 1-decynyl group, 4-octynyl group,
5-decynyl group, cyclobutyl group, cyclopentyl group,
Examples thereof include a cyclohexyl group, a cycloheptyl group, a cyclopentenyl group, a cyclohexenyl group and the like. Among these, it is more preferable that the main component is one or two or more selected from the group consisting of a linear or branched alkyl group having an arbitrary carbon number of 12 to 16. Examples of the linear or branched alkyl group having 12 to 16 carbon atoms include n-dodecyl group, n-tridecyl group, n-tetradecyl group, n-pentadecyl group, n-hexadecyl group and 2-methylundecyl group. Group, 3-methylundecyl group, 4-methylundecyl group, 5-methylundecyl group, 6-methylundecyl group, 2-ethyldecyl group, 3-ethyldecyl group, 4-ethyldecyl group, 5-ethyldecyl group, 2-propylnonyl group, 3-propylnonyl group, 4-propylnonyl group, 5-propylnonyl group, 2-butyloctyl group, 3-butyloctyl group, 2
-Methyltridecyl group, 3-methyltridecyl group, 4-
Methyltridecyl group, 5-methyltridecyl group, 6-methyltridecyl group, 7-methyltridecyl group, 2-ethyldodecyl group, 3-ethyldodecyl group, 4-ethyldodecyl group, 5-ethyldodecyl group, 6-ethyldodecyl group, 2-propylundecyl group, 3-propylundecyl group, 4-propylundecyl group, 5-propylundecyl group, 6-propylundecyl group, 2-butyldecyl group, 3-butyldecyl group , 4-butyldecyl group, 5-butyldecyl group, 2-pentylnonyl group, 3-pentylnonyl group, 4-pentylnonyl group, 2-hexyloctyl group, 2-methylpentadecyl group, 3-methylpentadecyl group, 4 -Methylpentadecyl group, 5-methylpentadecyl group, 6-methylpentadecyl group, 7-methylpentadecyl group, 8-methyl Pentadecyl group, 2-ethyltetradecyl group, 3-ethyltetradecyl group, 4-ethyltetradecyl group, 5-ethyltetradecyl group, 6-ethyltetradecyl group, 7-ethyltetradecyl group, 2-propyltridecyl group Group, 3-propyltridecyl group, 4-propyltridecyl group, 5-propyltridecyl group, 6-
Propyltridecyl group, 7-propyltridecyl group, 2
-Butyldodecyl group, 3-butyldodecyl group, 4-butyldodecyl group, 5-butyldodecyl group, 6-butyldodecyl group, 2-pentylundecyl group, 3-pentylundecyl group, 4-pentylundecyl group, 5-pentylundecyl group, 6-pentylundecyl group, 2-hexyldecyl group, 3-hexyldecyl group, 4-hexyldecyl group, 2-heptylnonyl group and the like can be mentioned.

By using at least one kind of glycoside composed of the sugar residue and the non-sugar portion, the interfacial tension can be lowered and a uniform film can be formed. Due to the presence of such glycosides, the hydrophilic polymer can be easily and uniformly spread on the surface of the substrate, and the thickness of the film can be easily adjusted. The glycoside, which is an alkyl group having a carbon number of 12 to 16 in the non-sugar portion, is generally poorly water-soluble, and may be dissolved in alcohol or the like in advance when mixed with a hydrophilic polymer. The amount of glycoside added is preferably an amount necessary to reduce the interfacial tension between the hydrophilic polymer solution and the surface of the base material to uniformly form a film of the hydrophilic polymer solution on the surface of the base material.

Further, a surfactant may be further added together with the glycoside in order to uniformly coat the surface of the substrate with the hydrophilic polymer film. This is because the surfactant also has the ability to reduce the interfacial tension and thus can play the same role as the glycoside. Surfactants that can be used include nonionic surfactants, anionic surfactants, and amphoteric surfactants. The cationic surfactant may be adsorbed on the surface of the base material to make the surface of the base material water-repellent, and washing is not easy, which is not always appropriate.

Examples of nonionic surfactants are polyoxyethylene alkyl ether, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene fatty acid ester, sucrose fatty acid ester, polyglycerin fatty acid ester, polyoxyethylene alkylamide, fatty acid alkanolamide. , Fluorinated surfactants, etc.

Examples of the anionic surfactant include fatty acid soap, polyoxyethylene alkyl ether sulfate,
There are polyoxyethylene alkyl ether acetate, alkyl sulfate, alkyl phosphate, polyoxyethylene alkyl ether phosphate, alkyl sulfonate, alkylbenzene sulfonate, and the like.

Examples of the amphoteric surfactant include carboxybetaine, sulfobetaine, imidazoline salt, lecithin,
Examples include enzyme-treated lecithin.

Among these, nonionic surfactants and anionic surfactants, particularly polyoxyethylene (9) dodecyl ether and dioctyl sodium sulfosuccinate are most preferred. These surfactants can be used alone or in combination of two or more. The added amount of the surfactant is preferably 0.01 to 5% by weight. Within this range, it is sufficient to reduce the interfacial tension, the improvement of the effect of forming a uniform film is recognized, and it is economically valuable.

Next, the method for producing the stain adhesion preventing composition will be illustrated, but the production method is not limited to the following examples.

The hydrophilic polymer is added while stirring the glycoside. When the glycoside is poorly water-soluble, the glycoside is dissolved in advance in alcohol such as methanol, ethanol, propanol, isopropanol, n-butanol, and n-pentanol, or a mixed solution of alcohol and a surfactant. Further, a predetermined amount of water may be added, and the hydrophilic polymer may be added thereto. When the glycoside is pasty at room temperature, the temperature of the glycoside may be raised to facilitate dissolution. Depending on the type of hydrophilic polymer, some are difficult to disperse in water and some do not dissolve unless heated to a high temperature, so add a certain amount of hydrophilic polymer to this while stirring a suitable amount of water in advance. A polymer solution may be prepared, and the temperature may be raised in some cases, and this may be added to the glycoside.

If the alcohol content is too high, it becomes difficult to dissolve the hydrophilic polymer. For this reason, it is necessary to select an alcohol that most dissolves the slightly water-soluble glycoside, but a surfactant can be added when the slightly water-soluble glycoside is dissolved. As the surfactant, those mentioned above can be used. Further, the surfactant may be added to the hydrophilic polymer solution in advance. It is preferable to add the hydrophilic polymer while appropriately stirring the glycoside solution. Alternatively, the stirring may be carried out at a high speed with a high speed homomixer or the like. This is because glycosides can be easily separated without stirring. Furthermore, a high-pressure homogenizer can be used if necessary. While stirring the hydrophilic polymer solution,
It is also possible to add a glycosito solution to this.

If necessary, water-soluble substances such as inorganic salts, organic salts, amino acids, saccharides and polyhydric alcohols, metal oxides, clay minerals, sequestering agents, etc., within the range not impairing the object of the present invention, Preservatives, colorants and the like can be added to the hydrophilic polymer solution.

Examples of the inorganic salts include sodium chloride,
Potassium chloride, sodium sulfate, sodium phosphate, sodium silicate, etc. are available. Examples of organic salts include sodium citrate, sodium gluconate, sodium tartrate, sodium acetate and the like. Examples of amino acids include glycine, alanine, proline, hydroxyproline, serine, phenylalanine and betaine. Examples of saccharides include glucose, fructose, sucrose, lactose, starch syrup and the like. Examples of the polyhydric alcohol include ethylene glycol, propylene glycol, glycerin, diethylene glycol, dipropylene glycol, polypropylene glycol, polyglycerin, butanediol, sorbitol, mannitol and maltitol. Examples of the metal oxide include silicon dioxide, titanium oxide, aluminum oxide, tin oxide and the like. Examples of clay minerals include bentonite, talc, kaolin, and mica. Examples of the sequestering agent include condensed phosphate and ethylenediaminetetraacetic acid. Examples of antiseptics include benzoic acid, sodium benzoate, salicylic acid, sorbic acid, potassium sorbate, sodium sorbate, dehydroacetic acid, sodium dehydroacetate and the like. Examples of colorants include cochineal and red No. 2.

The solution obtained by such treatment or the concentrated or diluted solution is the stain adhesion preventing composition.

The stain adhesion preventing composition of the present invention can be applied to the surface of a substrate by a method such as spray coating, dip coating, brush coating, roll coating or flow coating. The film is usually formed by natural drying after coating, but it can be heated after coating if necessary to shorten the drying time. Heating can be performed using hot air, infrared rays, or the like.

The thickness of the film can be adjusted by changing the hydrophilic polymer concentration, glycoside concentration, etc. in the composition, but it can also be adjusted by changing the coating conditions and the like. For example, in the case of dip coating, the thickness of the film can be adjusted by changing the pulling rate of the base material. The thickness of the dried film can be adjusted to any thickness depending on the type of substrate and the environment in which the substrate is placed.

The frequency of applying the composition of the present invention to the surface of the substrate depends on the type of substrate and the environment in which the substrate is placed.
The number of times is approximately twice / week to once / month.

The film formed on the surface of the base material as described above can prevent deterioration of the aesthetic appearance due to adhesion of dirt to the surface of the base material. Further, the film does not peel unless it is washed with water, and stains attached to the film can be easily washed with water or the like. Further, the film has excellent adhesion to the substrate and solvent resistance, has no adverse effect on the surface of the substrate, and has excellent safety.

[0042]

Embodiments of the present invention will be described below. However, the present invention is not limited to these.

<Example 1> (Preparation of undiluted solution of composition) In a container equipped with a stirrer,
20 g of pentylnonyl glucoside, 7 g of polyoxyethylene (9) dodecyl ether and 1 of isopropanol
Add 00 g and stir at 300 rpm for 5 minutes. Further, 658 g of water was added, and the mixture was stirred at 300 rpm for 30 minutes. Thereafter, 50 g of sodium tetrasodium edetate, 5 g of silica sol, and 200 g of soybean polysaccharide (Soya Five-S, manufactured by Fuji Oil Co., Ltd.) were added, and the mixture was stirred at 300 rpm for 30 minutes to homogenize it to obtain a stock solution.

(Preparation of Diluted Solution of Composition) The stock solution of the prepared composition was diluted 100 times, 200 times and 300 times respectively with water to obtain a diluted solution.

(Formation of film) 7 cm × 15 c without stain
Two glass plates of m, 1 for each diluted solution prepared above
It was soaked for a minute and pulled up at a speed of 15 cm / min. Then, this was dried in an environment of 100 ° C. for 5 minutes to form a film on the glass plate.

(Attachment of dirt) One of the glass plates having a film formed thereon is treated with an aqueous dirt solution (artificial rain: a mixture of Kanto loam, cement, silica, clay, salt, iron oxide, higher fatty acid, higher alcohol, etc.). Dispersed in water to make it weakly acidic)
The aqueous soil solution was immersed therein for 20 seconds while stirring with a magnetic stirrer, pulled up at a speed of 90 cm / min, and dried in an environment of 100 ° C. for 5 minutes. Further, the remaining one sheet of the glass plate on which the film has been formed is immersed in an oily stain liquid (a vinyl resin paint manufactured by Dainippon Paint Co., Ltd. diluted 10 times with butyl acetate) for 20 seconds, and 90 cm / min. Pulled up at the speed of.

(Washing and Drying of Glass Plate) The above-mentioned stained glass plate was washed with 50 ml / sec of tap water for 20 seconds and dried in an environment of 100 ° C. for 5 minutes.

The above (formation of film), (adhesion of dirt), and (cleaning and drying of glass plate) were repeated 10 times, and evaluation was carried out each time.

(Preparation of control) No film was formed,
A glass plate having a size of 7 cm × 15 cm without dirt is immersed in the aqueous soil solution for 20 seconds while stirring the aqueous soil solution with a magnetic stirrer, and is pulled up at a speed of 90 cm / min under an environment of 100 ° C. And dried for 5 minutes. In addition, it is 7 cm x 15 cm with no film formed and no dirt.
1 glass plate of the above is immersed in the oily stain liquid for 20 seconds,
It was pulled up at a speed of 90 cm / min. Wash the stained glass plate with tap water of 50 ml / sec for 20 seconds, and
It was dried in an environment of 0 ° C. for 5 minutes. The "adhesion of dirt" and the "washing of the glass plate and the drying after washing" were repeated 10 times, and the evaluation was performed each time.

(Evaluation method) The effect of preventing stains from adhering to each glass plate was evaluated by the opacity. The opacity is determined by measuring the reflectance of the dried glass plate with a reflectometer (MODEL TC-6D manufactured by Tokyo Denshoku Co., Ltd.), and the opacity = (R ₀
/ R _0.89 ) × 100. Here, R ₀ is the reflectance of the backing black reference plate, and R _0.89 is the reflectance of the backing white reference plate (Y value 89%).

<Example 2> (Preparation of undiluted solution of composition) In a container equipped with a stirrer,
20 g of pentylnonyl glucoside, 1 g of dioctyl sodium sulfosuccinate and 10 parts of isopropanol
Add 0 g and stir at 300 rpm for 5 minutes. Further, 629 g of water was added, and the mixture was stirred at 300 rpm for 30 minutes.
Then, 50 g of sodium tetrasodium edetate and modified starch (CAPSUL, manufactured by National Starch and Chemical Corporation) 200
g and stir at 300 rpm for 30 minutes to homogenize,
Stock solution. (Preparation of diluted solution of composition), (Formation of film), (Adhesion of dirt), (Cleaning of glass plate), (Preparation of control), (Evaluation method) are the same as in Example 1.

In <Example 1> and <Example 2>,
Tables 1 and 2 show the effects of preventing adhesion of water-based stains and oily stains. Table 1 shows the effect of preventing adhesion of water-based stains, and Table 2 shows the effect of preventing adhesion of oily stains. Note that the larger the number, the more stains, and the smaller the number, the less stains.

[0053]

[Table 1]

[0054]

[Table 2]

From Table 1, the effect of preventing the attachment of aqueous stains is more remarkable in the case of Example 1. In the case of Example 2,
The effect is remarkably improved as dirt is attached and washed repeatedly. The prevention of adhesion of aqueous stains is more effective than the control, almost independent of the dilution factor of the composition.

From Table 2, the effect of preventing oily dirt from adhering is particularly remarkable when the dilution ratio of Example 2 is 100 times. However, the anti-adhesion effect is larger than that of the control even in other dilution ratios of Example 2 or in the case of Example 1.

Depending on the nature of the dirt thus attached,
By appropriately changing the type, concentration, etc. of the hydrophilic polymer in the composition, the effect of preventing stain adhesion can be improved.

[0058]

The antifouling composition containing a hydrophilic substance capable of forming a film and glycoside forms a hydrophilic film uniformly on the surface of a base material, and the dirt adheres to the surface of the base material. Can be prevented. This film is hydrophilic, and stains attached to the film can be easily washed off with water or the like regardless of whether it is hydrophilic or lipophilic. Further, it has no influence on the surface of the base material and is highly safe. That is, conventionally, unless water repellency, oil repellency, etc. were imparted, it was not possible to prevent the adherence of stains on the substrate due to the film, but by simply applying a hydrophilic polymer film evenly on the substrate surface, It is possible to easily prevent dirt from adhering.

Claims (6)

[Claims] 1. A stain adhesion preventing composition comprising a hydrophilic substance capable of forming a film and a glycoside. 2. The hydrophilic substance capable of forming a film is mainly composed of one or a mixture of two or more selected from the group consisting of soybean polysaccharide, modified starch, dextrin, carboxymethyl cellulose and polyvinyl alcohol. The stain adhesion preventing composition according to claim 1, wherein 3. The non-sugar portion of the glycoside has 1 to 1 carbon atoms.
8 linear or branched alkyl group, alkenyl group,
The stain adhesion preventing composition according to claim 1 or 2, which is mainly composed of one or more selected from the group consisting of an alkynyl group, a cycloalkyl group and a cycloalkenyl group. 4. The non-sugar portion of the glycoside has 12 to 12 carbon atoms.
The antifouling composition according to any one of claims 1 to 3, which is mainly composed of 1 or 2 or more selected from the group consisting of 16 linear or branched alkyl groups. 5. The sugar residue of the glycoside is glucose or mannose or galactose or glucosamine or glucose, mannose, galactose,
The stain adhesion preventing composition according to any one of claims 1 to 4, wherein one or two or more selected from the group consisting of glucosamine is derived from two to four bound thereto. 6. The stain adhesion preventing composition according to claim 1, further comprising a surfactant.