KR20090014801A - Liquid compositions for anti-fogging agent - Google Patents

Abstract

A liquid antifogging agent composition is provided to ensure excellent environment-friendly property, adhesive strength, cleanability and smoothness and to maintain the antifogging effect stably for a long term. A liquid antifogging agent composition comprises a polyglycerine fatty acid ester compound, a surfactant and an organic acid. The polyglycerine fatty acid ester compound has HLB of 8-14 and the degree of polymerization of 3-10 and is contained in an amount of 0.1-2 parts by weight. The surfactant is at least one selected from the group consisting of an anionic surfactant and non-ionic surfactant and is contained in an amount of 0.05-5 parts by weight.

Description

Liquid compositions for anti-fogging agent

The present invention relates to a liquid antifogging composition comprising a polyglycerol fatty acid ester compound, a surfactant, and an organic acid, and more specifically, by using an active ingredient that is harmless to human body and excellent in biodegradability, while having excellent environmental friendliness and the like. The present invention relates to a composition capable of providing a low-cost liquid antifogging agent that has excellent adhesion, cleaning power, and smoothness to an adherend, and has an excellent antifogging effect that lasts for a long time.

The fog phenomenon (or blurring) refers to a phenomenon in which droplets form on an inner surface of a glass such as an automobile glass, a surface of a lens or a mirror, and the like. When the temperature of the glass is lower than the temperature of the surrounding atmosphere, the fog occurs due to a phenomenon in which the glass itself changes water vapor in the surrounding high temperature state to low temperature moisture in order to increase the temperature. It is caused by a combination of internal and external humidity or various factors such as various contaminants attached to glass. When the glimmer occurs, a problem such as a small drop of water adheres to the glass surface to block the view, such as a variety of anti-fog agents to prevent this is marketed.

Due to the nature of the glass surface, when a material having a low surface tension with respect to water is applied to the glass surface, an extended wetting action is performed to prevent a fog caused by adhesion wetting. Because of the properties of this glass, conventional anti-fog agents containing mainly various surfactants have been used, or a product which prevents the fogging by coating a special material on the glass surface has been used.

However, in the case of a conventional anti-fog agent mainly based on a surfactant such as soap, there is a problem that the active ingredient is easily washed out with time and the effect is not maintained for a long time. In addition, in the case of blocking the fog by coating a special material on the glass surface, the effect is maintained for a relatively long time, but the price was too expensive, it was difficult to commercialize.

Japanese Patent Laid-Open No. 1999-277688 is an antifogging sheet coated with at least one surface of a styrene resin sheet with an antifogging agent comprising a sucrose fatty acid ester and a polyglycerol fatty acid ester having an HLB of 11 to 18. A sheet in which the weight ratio of fatty acid esters is defined is disclosed. In addition, US Patent Publication No. 2004-197506 discloses an antifogging agent including a polyhydric alcohol fatty acid ester, a silicone oil and a hydrophilic polymer. The above technique is to add a polyglycerol fatty acid ester compound to the thermoplastic resin, and to produce in the form of a sheet or film to produce an antifogging (antifogging) effect. However, the anti-fog agent disclosed in the above technique is difficult to use, the cleaning effect is very poor, and the anti-fog effect is also not satisfactory.

In addition, there is a problem of environmental pollution as a problem with the conventional anti-fog. That is, the conventional anti-fog agent or detergent for cleaning the same contains a large amount of detergent components, since these detergents are a major cause of environmental pollution, recently developed an eco-friendly anti-fog agent while having an excellent anti-fog effect. This is desired.

The present invention has been made in consideration of the above-described conventional problems, and excellent anti-fog effect due to the excellent expansion and wettability of the environmentally friendly active ingredients, has a strong adhesion to the adherends, such as glass, the effect can be sustained for a long time, the interface It is an object of the present invention to provide a liquid antifogging composition having an improved cleaning effect due to a mixture of an active agent and an organic acid.

The present invention provides a liquid antifogging composition comprising a polyglycerol fatty acid ester compound, a surfactant, and an organic acid as a means for solving the above problems.

In the liquid antifogging composition of the present invention, the polyglycerol fatty acid ester compound preferably has HLB of 8 to 14, and a degree of polymerization of 3 to 10 is preferable. In addition, the polyglycerol fatty acid ester compound is preferably included in an amount of 0.1 to 2 parts by weight of the composition of the present invention.

In the liquid antifogging composition of the present invention, the surfactant is preferably an anionic surfactant and / or a nonionic surfactant, and the surfactant is preferably included in an amount of 0.05 to 5 parts by weight in the composition.

In addition, the content ratio (polyglycerin fatty acid ester compound / surfactant) of the polyglycerol fatty acid ester compound and the surfactant in the liquid antifogging composition of the present invention is preferably 0.02 to 40, more preferably in the range of 0.5 to 5. Do.

Examples of the organic acid included in the liquid antifogging composition of the present invention include succinic acid, tartaric acid, malic acid and / or citric acid, and the like, and the organic acid is preferably included in an amount of 0.1 to 5 parts by weight in the composition.

The composition of the present invention may also further comprise one or more components selected from the group consisting of alcohols, organic solvents, metal corrosion inhibitors, metal ion encapsulants, perfumes and purified water.

The composition of the present invention exhibits an excellent antifogging effect due to the excellent expansion wettability of the polyglycerol fatty acid ester compound included as an active ingredient. In addition, since the polyglycerol fatty acid ester compound is used as a food additive and is harmless to the human body and is an environmentally friendly material having excellent biodegradability, the composition of the present invention has excellent environmental friendliness as a whole.

The present invention relates to a liquid antifogging composition comprising a polyglycerol fatty acid ester compound, a surfactant, and an organic acid. As described above, the conventional anti-fog agent has a problem that the effect does not last long, is expensive, and is not preferable in terms of environment. However, in the case of the present invention, it is excellent in environmental friendliness and excellent anti-fogging effect by using polyglycerol fatty acid ester compound, surfactant, organic acid, etc., which is harmless to the human body and excellent in biodegradability as an active ingredient, The adhesion to the adherend, such as the glass surface, remains stable for a long time. In addition, the liquid anti-fogging agent composition of the present invention is excellent in cleaning power and decontamination, etc., so that no stains remain even during drying, so that a good watch can be maintained.

Hereinafter, the liquid antifogging composition of the present invention will be described in detail.

The anti-fog composition of the present invention contains a polyglycerol fatty acid ester compound as an active ingredient. The compound lowers the surface tension during adsorption of moisture by providing high hydrophilicity to the surface of the glass, such as the adherend, and prevents the fogging through expansion and wetting. In the present invention, the polyglycerol fatty acid ester compound refers to a compound obtained by esterifying a polyglycerol polymerized with glycerin into a fatty acid. In the present invention, it is preferable to use, in the polyglycerol fatty acid ester compound, the content of the unreacted diglycerin and fatty acid ester in the polymerization step is less than 5% by weight, and the content of the effective antifogging agent is 95% by weight or more. In addition, the compound is preferably a hydrophilic compound having a hydrophilic-lipophilic balance (HLB) of 8 to 14. If the HLB value is less than 8, the hydrophilicity is weak and there is a fear that the antifogging effect is lowered. Moreover, it is preferable that the polymerization degree of a polyglycerol fatty acid ester compound is 3-10. If the polymerization degree is less than 3, there is a fear that the anti-fogging effect is lowered, if it exceeds 10, the manufacturing cost rises, the economical efficiency is inferior.

The polyglycerol fatty acid ester compound used in the present invention is not particularly limited as long as it satisfies the above conditions, but it is preferable to use at least one selected from the group consisting of triglycerin fatty acid ester, tetraglycerin fatty acid ester and pentaglycerin fatty acid ester. Do. At this time, the fatty acid used for esterification of polyglycerol includes straight or branched saturated or unsaturated fatty acids, and the kind thereof is not particularly limited, but it is preferable to use fatty acids having 6 to 14 carbon atoms, and oleic acid ), Stearic acid, behenic acid, lauric acid, myristic acid, and one or more fatty acids selected from the group consisting of erucic acid. More preferred.

The polyglycerol fatty acid ester compound as described above is preferably included in the range of 0.1 to 2 parts by weight in the composition of the present invention. If the content is less than 0.1 part by weight, there is a fear that the antifogging effect of the composition is lowered, if it exceeds 2 parts by weight is not economical.

The anti-fog composition of the present invention also contains a surfactant as an active ingredient, which acts to rapidly expand and penetrate the glass surface upon application of the composition to remove contaminants and to enhance bonding to the surface. In the present invention, a surfactant commonly used in the art may be used without limitation, but it is preferable to use one or more selected from the group consisting of anionic surfactants and nonionic surfactants. Examples of the anionic surfactant at this time include alkyl benzene sulfonate, polyoxyethylene alkyl sulfonate, alkyl phosphate, sodium lauryl ether sulfonate and α-olefin sulfonate alone or in combination of two or more thereof; Nonionic surfactants include sorbitan fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene fatty acid esters, polyoxyethylene glycol, fatty acid akanolamides, and polyethylene alkyl ethers alone or in combination of two or more thereof. It is not limited to this.

The content of the surfactant is not particularly limited, but is preferably included in the range of 0.05 to 5 parts by weight in the composition of the present invention. If the content is less than 0.05 parts by weight, the effect of emulsifying and dispersing the glass surface contaminants may be lowered, and the antifogging effect may be lowered. When the content is more than 5 parts by weight, excessive bubbles may occur, resulting in manufacturing difficulties or staining after use. There is concern and not economical.

In the present invention, the content ratio (polyglycerin fatty acid ester compound / surfactant) of the polyglycerol fatty acid ester compound and the surfactant is also preferably 0.02 to 40, more preferably 0.5 to 5. When the said ratio is less than 0.02, there exists a possibility that the anti-fog effect of a composition, emulsification and dispersion effect of a contaminant may fall, and when it exceeds 40, there exists a possibility that manufacturing difficulty may arise or economic efficiency may fall.

The anti-fog composition of the present invention further comprises an organic acid. The component serves to improve the cleaning power of the composition, it is preferably included in the amount of 0.1 to 5 parts by weight in the composition of the present invention. If the content is less than 0.1 parts by weight, there is a fear that the effect of improving the cleaning power does not appear, and if it exceeds 5 parts by weight, there is no further effect increase and it is not economical. Examples of the organic acid that can be used in the present invention may include one or more selected from the group consisting of succinic acid, tartaric acid, malic acid, and citric acid, but is not limited thereto. .

The antifog composition of the present invention may also further comprise 2 to 40 parts by weight of alcohol. The component is included in the composition, prevents the occurrence of ice crystals on the glass surface or the like to prevent freezing, and serves to give a smoothness. If the content is less than 2 parts by weight, there is a fear that the effect of freezing at low temperature is lowered, and if it exceeds 40 parts by weight, it is not economical because no additional effect can be expected. In the present invention, alcohols generally used in the art may be used without limitation, and are not particularly limited, but it is preferable to use one or more selected from the group consisting of methanol, ethanol and isopropanol.

The antifog composition of the present invention may also contain 0.5 to 10 parts by weight of an organic solvent as an additional component. The component serves to enhance the penetration and degradation effects on contaminants upon use of the composition. If the content of the component is less than 0.5 parts by weight, there is a fear that the penetration and decomposition effects for the contaminants do not appear, and if it exceeds 10 parts by weight, it is not economical because no additional effect can be expected. Organic solvents usable in the present invention include ethylene glycol hexyl ether, propylene glycol methyl ether, dipropylene glycol methyl ether, propylene glycol propyl ether, propylene glycol butyl ether, dipropylene glycol butyl ether, diethylene glycol methyl ether, 3- One or more selected from the group consisting of methoxy-3-methyl-1-butanol and iso-H, but is not limited thereto.

The antifogging composition of the present invention may further comprise 0.001 to 2 parts by weight of the metal corrosion inhibitor, and the component serves to prevent the composition which is in aqueous form from causing corrosion. If the content of the corrosion inhibitor is less than 0.001 parts by weight, the corrosion protection is inferior, and if it is more than 2 parts by weight, it is not economical. Examples of the metal corrosion inhibitor that can be used in the present invention include, but are not limited to, one or more selected from the group consisting of narcium silicate, N-methyl morpholine and N-ethyl morpholine.

The anti-fog composition of the present invention may also further comprise 0.01 to 2 parts by weight of a metal ion encapsulant, wherein the component functions to capture metal ions contained in water. If the content is less than 0.01 part by weight, there is a fear that the effect of collecting metal ions is lowered. If the content is more than 2 parts by weight, it is not economical. Examples of the metal ion encapsulant that can be used in the present invention include, but are not limited to, polyvalent metal salts of ethylenediamine tetraacetic acid (EDTA) such as EDTA-4Na or EDTA-2Na.

The anti-fog composition of the present invention may also further comprise 0.005 to 5 parts by weight of fragrance, which can impart fresh fragrance to the composition to increase satisfaction upon use. Examples of flavors that can be imparted as the addition of flavors include citrus flavors, fruit flavors, and floral flavors, which can be used appropriately using conventional natural or chemically synthesized flavors known in the art. Can be given. At this time, if the content of the fragrance is less than 0.01 parts by weight, the effect of adding the fragrance is not obtained, if it exceeds 5 parts by weight there is a problem that the feeling of use is rather reduced or economical efficiency due to excessive fragrance.

In the antifog composition of the present invention, the remaining amount of each component other than the above-mentioned components is composed of water, preferably purified water, and the composition is selected from the group consisting of pigments, antioxidants and bactericides, etc. in a range that does not affect the effect of the invention. It may further comprise one or more selected adjuvants. The composition of the present invention can be prepared through conventional methods in the art using the above-described components, and the method is not particularly limited.

Hereinafter, the present invention will be described in more detail through examples according to the present invention and comparative examples not according to the present invention, but the scope of the present invention is not limited to the examples given below.

Example  1 to 5 and Comparative example  1 to 5

After mixing the components shown in Tables 1 and 2, by adjusting the weight of the total composition to 100 with purified water, to prepare an example and a comparative example, respectively.

TABLE 1

Example 1 Example 2 Example 3 Example 4 Example 5 Polyglycerol monooleate 0.5 One One 0.5 One Alkylbenzene sulfonates 0.5 0.2 0.5 0.5 - Polyoxy ethylene glycol - 0.2 - - 0.5 ethanol 10 10 10 10 10 Citric acid 0.2 0.2 0.2 0.2 0.2 Ethylene Glycol Hexyl Ether 3 - 5 - 5 Propylene Glycol Butyl Ether - 3 - 5 - EDTA-4Na 0.1 0.1 0.1 0.1 0.1 Sodium silicate 0.5 0.6 0.7 0.8 0.9 Spices 0.1 0.1 0.1 0.1 0.1

(Unit: parts by weight)

TABLE 2

Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Comparative Example 6 Comparative Example 7 Polyglycerol monooleate 3 - 3.5 - - 0.5 0.5 Alkylbenzene sulfonates 0.002 0.02 - 10 - 0.4 - Polyoxy ethylene glycol - 0.02 0.5 - - - - ethanol 10 10 - 30 10 10 10 Citric acid 0.2 0.2 0.2 0.2 - - 0.2 Ethylene Glycol Hexyl Ether 10 10 0.5 10 5 3 5 Propylene Glycol Butyl Ether - 0.1 - 20 - - - EDTA-4Na 0.1 0.1 0.1 0.1 0.1 0.1 0.1 Sodium silicate 0.0005 0.3 0.3 0.3 - 0.5 0.5 Spices 0.1 0.1 0.1 0.1 0.1 0.1 0.1

(Unit: parts by weight)

For the Examples and Comparative Examples prepared above, the surface tension, anti-fog property, clearness, corrosion of metals, washability and freezing point of the composition were measured by the following method.

1.surface tension

The surface tension of the compositions of Examples and Comparative Examples was measured using a dynamic surface tension meter BP2 from Kruss.

2. Seorim Kim Preventive

The experiment was conducted according to the automotive anti-fog test specified in KS M 2742. Specifically, the number of repetitions of the sample was applied to the transparent plate glass and the steam generated by the steam generator was brought into contact with the surface on which the sample was applied, until the cloudiness or the dew occurred. Approximately 10% of the surface area of the sample coated glass was based on the number of repetitions until blurring or dewing occurred.In case of blurring or dewing within the first 3 minutes, 0 repetition times and blurring or dewing occured on the second time. The case was defined as the number of repetitions twice and the case of cloudy or dewy occurrences at the third time.

3. Explicit

The experiment was carried out in accordance with the automotive anti-fog test specified in KS M 2742. Specifically, the light source of the lighting box placed at a distance of 7.6 m in front of the sample was passed through the transparent glass plate on which the sample was applied, and the transparency and brightness were visually examined. Both glass specimens were made "explicit" when there was no precipitation of solids that severely impaired transparency and little change in phase shape and brightness.

4. Corrosive to metals

The experiment was conducted according to the automotive antifog test specified in KS M 2742. Specifically, four samples prepared by dipping each of two kinds of metal test specimens were prepared, and the samples were maintained at 50 ° C. for 48 hours, and then the weight change and appearance of the metal test specimens were examined based on the following criteria.

-Weight change: The case where the weight change (mg / cm ³ ) of the aluminum plate and the zinc plate is within the range of ± 0.30 and ± 1.50, respectively, is marked as "O", and the case outside the above range is indicated. Inappropriate ones are marked with an "X".

-After measuring the weight change, when the surface condition of the metal specimen was examined, the case where there was little discoloration and corrosion was marked as "no change" (except the surface roughness of the zinc sheet).

5. Detergency

The experiment was conducted according to the automotive antifog test specified in KS M 2742. Specifically, a prescribed amount of artificial contaminant was applied and dried on a transparent glass specimen. Thereafter, the antifogging agent was sprayed and wiped on the applied artificial contaminant, and a "S" was drawn with a finger wrapped with gauze, and the degree of washing contamination was visually determined, and the washing power was evaluated.

That is, compared with the glass specimens treated with the glass specimens in accordance with the method for adjusting the glass specimens, whether or not the transparency is such that there is no trace of “S” drawing, and whether or not the precipitates that significantly affect the transparency appear in the following criteria. Evaluated accordingly.

3 = (right) no “S” marks, clear

2 = (positive) no “S” marks, slightly unclear

1 = (A) “S” marks are identified and contamination exists

6. Freezing Point

After testing according to the windshield cleaning liquid test of KS M 2163, the average value of the three measurements was recorded to one decimal place.

The results measured by this method are shown in Tables 3 and 4 below.

TABLE 3

Example 1 Example 2 Example 3 Example 4 Example 5 Surface tension ( dyne Of cm ) 23.1 22.4 19.2 21.4 22.8 Seorim Kim Preventive (Count) 3 4 4 3 4 Explicitness Can be specified Can be specified Can be specified Can be specified Can be specified Metal corrosive Weight change ( mg Of cm ) Alu Medium O O O O O zinc O O O O O Appearance No change No change No change No change No change Detergency 3 (Right) 3 (Right) 3 (Right) 3 (Right) 3 (Right) Freezing point (℃) -14.9 -15.1 -15.2 -14.8 -15.1

TABLE 4

Comparative example One Comparative example 2 Comparative example 3 Comparative example 4 Comparative example 5 Comparative example 6 Comparative example 7 Surface tension ( dyne Of cm ) 25.4 27.4 23.5 19.1 39.8 28.5 32.3 Seorim Kim Preventive (Count) 2 One 2 One 0 2 2 Explicitness Not specified Can be specified Not specified Not specified Can be specified Can be specified Can be specified Metal corrosive Weight change ( mg Of cm ³ ) Alu Medium X O O O X O O zinc X O O O X O O Appearance Corrosion occurrence No change No change No change Corrosion occurrence No change No change Detergency 2 (quantity) 1 (a) 2 (quantity) 3 (Right) 1 (a) 1 (a) 1 (a) Freezing point (℃) -15.3 -15.7 -3.8 -15.1 -15.4 -14.8 -14.2

As shown in Table 3, the composition according to the embodiment of the present invention showed excellent anti-fog property at the same time excellent in clarity and washability, but the anti-fog property and washability in the comparative example was found to decrease overall .

In detail, Comparative Examples 2, 4, and 5, which do not include a polyglycerol fatty acid ester compound, had low antifogging properties, and in Comparative Example 5, the number of repetitions showing antifogging properties was 0. In addition, Comparative Examples 1, 3, and 4 using an excessive amount of a polyglycerin fatty acid ester compound or a surfactant were found to have poor clarity and anti-fogging properties, and Comparative Examples 5 and 6 without addition of an organic acid were washed. It fell very much, especially in Comparative Example 5 in which both the surfactant and the organic acid were not used, as described above, the number of repetitions showing the antifogging property was 0. In the case of Comparative Example 7, the surfactant was not added, which is also inferior in washability and high in surface tension, thereby reducing antifogging property.

In addition, Comparative Examples 1 and 5 with or without a small amount of metal corrosion inhibitors were very poor in corrosion resistance to the metal, Comparative Example 3 without the alcohol component showed a phenomenon that is easily frozen even at low temperatures.

Claims (17)

A liquid antifogging composition comprising a polyglycerol fatty acid ester compound, a surfactant, and an organic acid. The method of claim 1, The polyglycerol fatty acid ester compound has an HLB of 8 to 14, and the degree of polymerization of the polyglycerol is 3 to 10, characterized in that the liquid antifog composition. The method of claim 2, The polyglycerol fatty acid ester compound is at least one selected from the group consisting of triglycerin fatty acid esters, tetraglycerin fatty acid esters and pentaglycerin fatty acid esters. The method of claim 3, wherein The fatty acid is at least one selected from the group consisting of oleic acid, stearic acid, behenic acid, lauric acid, myristic acid and erucic acid liquid antifogging composition. The method of claim 1, The polyglycerol fatty acid ester compound is a liquid antifogging composition, characterized in that contained in the amount of 0.1 to 2 parts by weight. The method of claim 1, A liquid antifogging composition, characterized in that the surfactant is at least one selected from the group consisting of anionic surfactants and nonionic surfactants. The method of claim 1, The surfactant is a liquid antifogging composition, characterized in that contained in the composition in an amount of 0.05 to 5 parts by weight. The method of claim 1, The content ratio (polyglycerol fatty acid ester compound / surfactant) of a polyglycerol fatty acid ester compound and surfactant is 0.02-40, The liquid antifog composition characterized by the above-mentioned. The method of claim 1, The organic acid is contained in the composition in an amount of 0.1 to 5 parts by weight of the liquid antifog composition. The method of claim 1, Liquid antifogging composition, characterized in that the organic acid is at least one selected from the group consisting of succinic acid, tartaric acid, malic acid and citric acid. The method of claim 1, Liquid antifogging composition, characterized in that the composition further comprises 2 to 40 parts by weight of alcohol. The method of claim 11, Alcohol is at least one liquid antifogging composition selected from the group consisting of methanol, ethanol and isopropanol. The method of claim 1, Liquid antifogging composition, characterized in that the composition further comprises 0.5 to 10 parts by weight of an organic solvent. The method of claim 1, Liquid antifogging composition, characterized in that the composition further comprises 0.001 to 2 parts by weight of the metal corrosion inhibitor. The method of claim 14, The metal corrosion inhibitor is at least one selected from the group consisting of sodium silicate, N-methyl morpholine and N-ethyl morpholine. The method of claim 1, Liquid antifogging composition, characterized in that the composition further comprises 0.01 to 2 parts by weight of a metal ion encapsulant. The method of claim 16, Metal ion encapsulation agent is a liquid anti-fogging composition, characterized in that the polyvalent metal salt of EDTA.