KR101610217B1 - Anti-fog coating layer structure and method for forming thereof - Google Patents

Abstract

The present invention relates to an anti-fog coating layer structure, comprising: an anti fog coating layer structure which comprises an anti-fog layer formed by coating a mixture of a hydrophilic agent, a hard coating liquid and a leveling agent on a substrate; .
According to the present invention, because of the thermosetting type, no UV curing equipment is required, and when an -OH group is present on the substrate, a strong bond is formed between the substrate and the anti-coating layer through a condensation reaction with the constituent material of the anti- It is easy to control the interfacial adhesion force, has a strong adhesive force, has excellent mechanical strength and chemical stability, and is simple and easy to form an anti-fog coating layer.

Description

An anti-fog coating layer structure and a method for forming the anti-

The present invention relates to an anti-fog coating layer structure and a method of forming the same, and more particularly to an anti fog coating layer structure providing an anti-fog coating layer excellent in mechanical strength and chemical stability and a method for forming the same.

Generally, an anti-fog coating means a coating in which the size of water droplets formed on the surface is made sufficiently small so that light scattering does not occur. In addition, the anti-fog coating includes not only the size of the droplet sufficiently small but also the case where the droplet is not formed at all.

A conventional anti-fog coating technique is disclosed in Korean Patent No. 10-0248470 entitled " Fogging and sunlight control film ", which is a plastic film coated with a metal deposition layer and a pressure sensitive adhesive layer, The pressure-sensitive adhesive layer is coated with an aqueous release layer and the other surface is coated with an anti-fog layer, and the anti-fog layer includes an anti-fog agent and an ultraviolet curable resin.

However, such a conventional technique has a problem in that a UV-curable resin is used to produce a UV-curable material, and a separate UV curing device is required.

Also, as shown in FIG. 1, the conventional technique requires that a C = C bond exists in the underlying substrate in order for the anti-fog layer to bond with the underlying substrate, and there is also a C = C bond in the upper anti- And it is difficult to control the adhesion between the substrate and the barrier and the anti-fog layer, thereby making it difficult to secure the required adhesive strength, and the mechanical strength and chemical stability are deteriorated.

In order to solve the problems of the prior art as described above, it is an object of the present invention to provide a curable resin composition which does not require a UV curing equipment, is easy to control the interfacial adhesion force, is easy to secure a strong adhesive force, has excellent mechanical strength and chemical stability And the process for forming the anti-fog coating layer is simple and easy.

Other objects of the present invention will become readily apparent from the following description of the embodiments.

According to an aspect of the present invention, there is provided an anti-fog coating layer structure comprising an anti-fog layer formed by coating a mixture of a hydrophilic agent, a hard coating liquid and a leveling agent on a substrate, An anti-fog coating layer structure is provided.

And a barrier layer formed by coating a hard coating liquid on the substrate before forming the anti-fog layer, wherein the anti-fog layer is formed on the exposed surface.

The hard coating liquid may include a hydrolyzable silane or a hydrolyzable silane.

The silane may be a hydrolyzable silane compound derived from any one of, or a combination of, tetraethoxysilane (TEOS), tetramethoxysilane (TMOS), epoxysilane, vinylsilane, acrylsilane, aminosilane and isocyanate silane , And a hydrolyzable silane compound derived therefrom.

The hard coating solution may comprise a mixture comprising TEOS (tetraethoxysilane), an epoxy silane, a catalyst and a solvent.

The hard coating solution may comprise 7 to 20% by weight of the TEOS, 7 to 20% by weight of the epoxy silane, 0.1 to 0.1% by weight of 0.1 N HCl as the catalyst, and 59 to 85.9% by weight of alcohol as the solvent.

The hydrophilic agent may be any one of a molecular compound having a negative charge, a molecular compound having a positive charge, a molecular compound having an electrically neutral molecule, or a combination thereof.

Said hydrophilic agent, Tween 20, Tween 80, PEG -400, PEG-600, - (C 2 H 4 O) -, NR 4 + (Ammonium), R-COO - (Carboxylate), RSO 3 - (Sulfonate) _{, OPR (OR) 2 (Phosphonate} ), OPR 3 (Phosphine oxide), P (OR) R 2 (Phosphinite), P (OR) 2 R (Phosphonite), P (OR) 3 (Phosphite), OP (OR) R ₂ (Phosphinate), OP (OR) ₃ (Phosphate), or a combination of hydrophilic surface active agents having any one of the above groups.

The mixture may comprise 7 to 20 wt% of the hydrophilic agent, 75 to 92.999 wt% of the hard coating solution, and 0.001 to 5 wt% of the leveling agent.

According to another aspect of the present invention, there is provided a method of forming an anti-fog coating layer structure, comprising: preparing a substrate; And coating a mixture of a hydrophilic agent, a hard coating liquid and a leveling agent on the substrate to form an anti-fog layer.

Further comprising the step of coating a hard coating liquid on the substrate to form a barrier layer before forming the anti-fog layer, wherein the anti-fog layer is formed on the barrier layer.

The hard coating liquid may include a hydrolyzable silane or a hydrolyzable silane.

The silane may be a hydrolyzable silane compound derived from any one of, or a combination of, tetraethoxysilane (TEOS), tetramethoxysilane (TMOS), epoxysilane, vinylsilane, acrylsilane, aminosilane and isocyanate silane , And a hydrolyzable silane compound derived therefrom.

The hard coating solution may comprise a mixture comprising TEOS (tetraethoxysilane), an epoxy silane, a catalyst and a solvent.

The hard coating solution may comprise 7 to 20% by weight of the TEOS, 7 to 20% by weight of the epoxy silane, 0.1 to 0.1% by weight of 0.1 N HCl as the catalyst, and 59 to 85.9% by weight of alcohol as the solvent.

The step of forming the anti-fog layer may be any one of a molecular compound having a negative charge, a molecular compound having a positive charge, and a molecular compound having an electrically neutral molecule, or a combination thereof.

Forming said anti-fogging layer, the wetting agent Tween 20, Tween 80, PEG- 400, PEG-600, - (C 2 H 4 O) -, NR 4 + (Ammonium), R-COO - (Carboxylate ^{_{), RSO 3 - (Sulfonate)}} , OPR (OR) 2 (Phosphonate), OPR 3 (Phosphine oxide), P (OR) R 2 (Phosphinite), P (OR) 2 R (Phosphonite), P (OR) 3 A hydrophilic surface active agent having any one of the group of phosphite, OP (OR) R ₂ (Phosphinate) and OP (OR) ₃ (phosphate), or a combination of hydrophilic surface active agents having any one of the above groups Lt; / RTI >

The step of forming the anti-fog layer may comprise 7 to 20 wt% of the hydrophilic agent, 75 to 92.999 wt% of the hard coating agent, and 0.001 to 5 wt% of the leveling agent.

According to the anti-fog coating layer structure and the method of forming the same according to the present invention, since the anti-fog coating layer structure and its formation method are thermosetting, it does not require a UV curing equipment, And the anti-fog coating layer can be easily and easily adjusted, the strong adhesion can be ensured easily, the mechanical strength and the chemical stability are excellent, and the process of forming the anti-fog coating layer is simple and easy.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view for explaining a combination of anti-fog layers according to the prior art. Fig.
2 is a cross-sectional view showing an anti-fog coating layer structure according to an embodiment of the present invention.
3 is a flow chart illustrating a method of forming an anti-fog coating layer structure in accordance with one embodiment of the present invention.
4 is a view for explaining the bonding of the anti-fog coating layer according to one embodiment of the present invention.

The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated and described in detail in the drawings. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but is to be understood to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention, And the scope of the present invention is not limited to the following examples.

Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings, wherein like or corresponding elements are denoted by the same reference numerals, and redundant explanations thereof will be omitted.

2 is a cross-sectional view showing an anti-fog coating layer structure according to an embodiment of the present invention.

Referring to FIG. 2, an anti-fog coating layer structure 10 according to one embodiment of the present invention is formed with an anti-fog layer 12 on a substrate 1. In addition, a barrier layer 11 may be additionally formed between the substrate 1 and the anti-fog layer 12.

The substrate (1) may be made of glass or a polymer substrate. Here, the glass may be glass generally used, as well as tempered glass or the like. The plastic may also be a plastic such as polyethylene terephthalate (PET), polyethylene (PE), polycarbonate (PC), polypropylene (PP), polytetrafluoroethylene (PTEE), polystyrene, polybutadiene, polynitrile, Urethane, polymethyl methacrylate, polyacrylate, polyamide, polybutylene terephthalate (PBT) and the like can be used.

The barrier layer 11 may be formed by coating a hard coating liquid on the substrate 1 before forming the anti-fog layer 12, and the anti-fog layer 12 may be formed on the exposed surface, And serves as a hard coating layer formed by coating the substrate 1 with a hard coating liquid. Since the base material 1 can be bonded to the anti-fog layer 12 in the presence of -OH, the barrier layer 11 is not necessarily required. As the substrate 1 having a large amount of OH, not only glass but also polyethylene terephthalate The anti-fog layer 12 may be formed on the anti-fog layer 12. However, if the substrate 1 does not show sufficient surface hardness, the barrier layer 11 may be formed first on the surface of the substrate 1, and then the anti-fog layer 12 may be formed.

The hard coating liquid of the barrier layer 11 is not limited as long as it is a coating liquid for forming a hard coating layer and may be a composition having an acrylate group or a metal chelate group and may be formed of a thermosetting coating liquid which does not harden upon exposure to light , Such as a hydrolyzable silane, or a hydrolyzable silane. Here, the silane may be any one of tetraethoxysilane (TEOS), tetramethoxysilane (TMOS), epoxysilane, vinylsilane, acrylsilane, aminosilane and isocyanate silane, a combination thereof, or a hydrolyzable silane compound derived from any one of them , And a hydrolyzable silane compound derived therefrom.

The hard coating solution of the barrier layer 11 may be composed of, for example, a mixture containing TEOS (tetraethoxysilane), an epoxy silane, a catalyst and a solvent, for example, 7 to 20% by weight of TEOS, 7 to 20% by weight of an epoxy silane, 0.1 to 1.0% by weight of 0.1N HCl, and 59 to 85.9% by weight of alcohol as a solvent. MTMS (Methyltrimethoxysilane) may also be added as a hard coat layer. In this case, 7 to 20 wt% of TEOS, 7 to 20 wt% of MTMS, 7 to 20 wt% of epoxy silane, 0.1 to 0.1 N of HCl as a catalyst, 1.0% by weight, and alcohol as a solvent 39 to 78.9% by weight. The alcohol may be ethanol, but not limited thereto, methanol, butanol, propanol, etc., or a mixture thereof. In addition, the hard coating liquid may be optionally mixed with 0.01 to 1.5% of Al (acac) _{3 based} on the total weight.

The antifog layer 12 serves to minimize water droplets formed on the barrier layer 11 or to prevent water droplets from being formed and to prevent condensation with hydrolysis silanes existing in the barrier layer 11, And can be formed by coating a mixture of a hydrophilic agent, a hard coating liquid, and a leveling agent on the barrier layer 11. [0035]

Hydrophilic agents include, for example, molecular compounds having a negative charge such as carboxylate, phosphonate, phosphinate, sulfate, sulfonate and the like, ammonium salts and the like Tween 20, Tween 80, PEG-400, PEG-600, - (C ₂ H ₄ O) -, or a combination thereof. ^{_{, NR 4 + (Ammonium),}} R-COO - (Carboxylate), RSO 3 - (Sulfonate), OPR (OR) 2 (Phosphonate), OPR 3 (Phosphine oxide), P (OR) R 2 (Phosphinite), P (OR) ₂ R (Phosphonite), P (OR) ₃ (Phosphite), OP (OR) R ₂ and OP (OR) ₃ (Phosphate) And a hydrophilic surfactant having any one of the above-mentioned groups, but not limited thereto, It may be used as material or a variety of other surface active agent. PEG-400 and PEG-600 have a chemical name of Poly Ethylene Glycol. In the above group, R may be, for example, alkyl, aryl, hydrogen (H), etc., and each may be different from each other.

The hard coating liquid used for forming the anti-fog layer 12 may be in the same composition or weight ratio as the hard coating liquid used for forming the barrier layer 11 described above, May be formed in a composition and weight ratio different from the hard coating liquid used for forming the barrier layer (11).

The leveling agent may serve to reduce the surface tension, for example, a silicon series or an acrylic series may be used.

The mixture for forming the anti-foogue layer 12 may comprise, for example, 7 to 20% by weight of a hydrophilic agent, 75 to 92.999% by weight of a hard coating solution, and 0.001 to 5% by weight of a leveling agent.

When the barrier layer 11 is used as the hard coat layer and the anti-fog layer 12 is laminated thereon, the pencil hardness and the scratch resistance are increased as compared with the anti-fog coating layer not having the existing barrier layer I could confirm.

3 is a flow chart illustrating a method of forming an anti-fog coating layer structure in accordance with one embodiment of the present invention. The method for forming the anti-fog coating layer structure according to one embodiment of the present invention is a method for forming the anti-fog coating layer structure 10 according to one embodiment of the present invention, and a description thereof will be omitted.

Referring to FIG. 3, a method of forming an anti-fog coating layer structure according to an embodiment of the present invention includes a step S11 of preparing a substrate 1, a step S11 of forming a layer of a hydrophilic agent, And coating the mixture to form an anti-fog layer 12, and before forming the anti-fog layer 12, a hard coating liquid is coated on the substrate 1 to form the barrier layer 11, The anti-fog layer 12 may be formed on the barrier layer 11 by further including a step S12 of forming the anti-fog layer 12. [

In the step of forming the barrier layer (S12) and the step of forming the anti-fog layer (S13), each of the hard coating liquids may comprise, for example, a hydrolyzable silane or a hydrolyzable silane. Here, the silane may be any one of tetraethoxysilane (TEOS), tetramethoxysilane (TMOS), epoxysilane, vinylsilane, acrylsilane, aminosilane, isocyanate silane, a combination thereof, or a hydrolyzable silane compound derived from any one of them , And a hydrolyzable silane compound derived therefrom. Further, in the step of forming the barrier layer (S12) and the step of forming the anti-fog layer (S13), each of the hard coating liquids may be composed of a mixture containing TEOS (tetraethoxysilane), an epoxy silane, a catalyst and a solvent, 7 to 20 wt% of an epoxy silane, 7 to 20 wt% of an epoxy silane, 0.1 to 0.1 wt% of 0.1 N HCl as a catalyst, and 59 to 85.9 wt% of an alcohol as a solvent. Also, in the step of forming the barrier layer (S12), a process for drying, for example, a heat curing process using an oven or the like may be performed depending on the characteristics of the hard coating solution.

In step S13 of forming the anti-fog layer, the hydrophilic agent may have a negative charge such as a carboxylate, a phosphonate, a phosphinate, a sulfate, a sulfonate, Tween 20, Tween 80, PEG-400, PEG-600, PEG-600, and PEG-600 may be any one of, or a combination of, a molecular compound having a positive charge such as a molecular compound, an ammonium salt, _{- (C 2 H 4 O)} -, NR 4 + (Ammonium), R-COO - (Carboxylate), RSO 3 - (Sulfonate), OPR (OR) 2 (Phosphonate), OPR 3 (Phosphine oxide), P ( _{OR) R 2 (Phosphinite),} P (OR) 2 R (Phosphonite), P (OR) 3 (Phosphite), any one from the group of _{OP (OR) R 2 (Phosphinate} ), OP (OR) 3 (Phosphate) Or a hydrophilic surface active agent having any one of the groups described above, A surfactant of the Tween series or various other surfactants may be used. PEG-400 and PEG-600 have a chemical name of Poly Ethylene Glycol. In the above group, R may be, for example, alkyl, aryl, hydrogen (H), etc., and each may be different from each other. The hard coating liquid for forming the anti-fog layer may be the same material or mixture as the hard coating liquid to be coated in forming the barrier layer 11 as described above, or may be a different material or a mixture, as a coating liquid for forming the hard coating layer. The leveling agent may be, for example, a silicone series or an acrylic series.

In the step (S13) of forming the anti-fog layer, the mixture may comprise 7 to 20% by weight of a hydrophilic agent, 75 to 92.999% by weight of a hard coating solution, and 0.001 to 5% by weight of a leveling agent.

On the other hand, the step of forming the barrier layer (S12) and the step of forming the anti-fog layer (S13) may be carried out by coating a hard coating liquid on the substrate 1 or coating the barrier layer 11 with various coatings Methods can be used, including, for example, slit die coating, dip coating, gravure coating, spining coating, roll coating, bar coating, spray coating, and flow coating may be used.

As one embodiment of the method for forming the anti-fog coating layer structure according to the present invention, the base material 1 was prepared by mixing 7 wt% of TEOS, 7 wt% of epoxy silane, 0.5 wt% of 0.1N HCl as a catalyst, 85.5 wt % Of Tween 20 as a hydrophilic agent, 92 wt% of a hard coating solution for forming the barrier layer 11 as described above on the barrier layer 11 (S12) , And 1% by weight of a leveling agent are coated to form the antifog layer 12.

As a result of measuring the pencil hardness of the thus formed anti-fog coating layer structure, it was confirmed that the scratch resistance and slip feeling were excellent.

According to the anti-fog coating layer structure and the method for forming the same according to the present invention, it is possible to utilize an oven or a hot plate which is commonly used without requiring a UV curing equipment because it is a thermosetting type. When it is present, it causes a strong coupling between the substrate and the anti-coating layer through the condensation reaction with the silane which is a constituent of the anti-fog layer, and it is easy to control the interfacial adhesion force, , Mechanical strength and chemical stability, and the formation process of the anti-fog coating layer is simple and easy.

As shown in FIG. 4, unlike the case where a UV light source is required in the ultraviolet curing type of the prior art (see FIG. 1) and a photoinitiator which is activated by receiving ultraviolet light is required, And the process is simple. Further, in the prior art, the ultraviolet curing base material should have C = C bond, but according to the present invention, the thermosetting base material has no problem in the coating operation if the -OH functional group is excessively present, When the anti-fog layer is raised, a perfect interfacial bonding force can be secured between the two interfaces due to the condensation reaction of the silane.

Although the present invention has been described with reference to the accompanying drawings, it is to be understood that various changes and modifications may be made without departing from the spirit of the invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined by the scope of the appended claims and equivalents thereof.

1: substrate
11: barrier layer
12: Antifog layer

Claims (18)

In the anti-fog coating layer structure,
An anti-fog layer formed by coating a mixture of a hydrophilic agent, a hard coating liquid and a leveling agent on a substrate,
The hard coating liquid may contain,
A hydrolyzable silane, or a hydrolyzable silane,
The hard coating liquid may contain,
A mixture comprising tetraethoxysilane (TEOS), an epoxy silane, a catalyst and a solvent. The method according to claim 1,
Further comprising a barrier layer formed by coating a hard coating liquid on the substrate before forming the anti-fog layer, wherein the anti-fog layer is formed on the exposed surface. delete The method according to claim 1,
The silane,
A hydrolyzable silane compound derived from any one of, or a combination of, tetraethoxysilane (TEOS), tetramethoxysilane (TMOS), epoxysilane, vinylsilane, acrylsilane, aminosilane, isocyanate silane, Wherein the hydrolyzable silane compound is a hydrolyzable silane compound. delete The method according to claim 1,
The hard coating liquid may contain,
7 to 20% by weight of the TEOS, 7 to 20% by weight of the epoxy silane, 0.1 to 0.1% by weight of 0.1 N HCl as the catalyst, and 59 to 85.9% by weight of alcohol as the solvent. The method according to claim 1,
The hydrophilic agent,
An antifog coating layer structure comprising any one of a molecular compound having a negative charge, a molecular compound having a positive charge, and a molecular compound having an electrically neutral molecule, or a combination thereof. The method according to claim 1,
The hydrophilic agent,
Tween 20, Tween 80, PEG- 400, PEG-600, - (C 2 H 4 O) -, NR 4 + (Ammonium), R-COO - (Carboxylate), RSO 3 - (Sulfonate), OPR (OR) _{2 (Phosphonate), OPR 3 (} Phosphine oxide), P (OR) R 2 (Phosphinite), P (OR) 2 R (Phosphonite), P (OR) 3 (Phosphite), OP (OR) R 2 (Phosphinate) , OP (OR) ₃ (Phosphate), or a hydrophilic surface active agent having any one of the above-mentioned groups. The method according to any one of claims 1, 7 or 8,
The mixture may contain,
An anti-fog coating layer structure comprising 7 to 20% by weight of the hydrophilic agent, 75 to 92.999% by weight of the hard coating solution, and 0.001 to 5% by weight of the leveling agent. In the method for forming an anti-fog coating layer structure,
Preparing a substrate; And
Coating a mixture of a hydrophilic agent, a hard coating liquid and a leveling agent on the substrate to form an anti-fog layer;
Coating a hard coating liquid on the substrate to form a barrier layer before forming the anti-fog layer,
Wherein the anti-fog layer is formed on the barrier layer,
The hard coating liquid may contain,
A hydrolyzable silane, or a hydrolyzable silane,
The hard coating liquid may contain,
A mixture comprising tetraethoxysilane (TEOS), an epoxy silane, a catalyst, and a solvent. delete delete The method of claim 10,
The silane,
A hydrolyzable silane compound derived from any one of, or a combination of, tetraethoxysilane (TEOS), tetramethoxysilane (TMOS), epoxysilane, vinylsilane, acrylsilane, aminosilane, isocyanate silane, Wherein the hydrolyzable silane compound is a hydrolyzable silane compound. delete The method of claim 10,
The hard coating liquid may contain,
Wherein the catalyst comprises 7 to 20% by weight of the TEOS, 7 to 20% by weight of the epoxy silane, 0.1 to 0.1% by weight of 0.1 N HCl as the catalyst and 59 to 85.9% by weight of alcohol as the solvent. The method of claim 10,
Wherein forming the anti-fog layer comprises:
Wherein the hydrophilic agent is any one of a molecular compound having a negative charge, a molecular compound having a positive charge, and a molecular compound having an electrically neutral molecule, or a combination thereof. The method of claim 10,
Wherein forming the anti-fog layer comprises:
The wetting agent Tween 20, Tween 80, PEG- 400, PEG-600, - (C 2 H 4 O) -, NR 4 + (Ammonium), R-COO - (Carboxylate), RSO 3 - (Sulfonate), OPR _{(OR) 2 (Phosphonate),} OPR 3 (Phosphine oxide), P (OR) R 2 (Phosphinite), P (OR) 2 R (Phosphonite), P (OR) 3 (Phosphite), OP (OR) R 2 Wherein the hydrophilic surface active agent is composed of a hydrophilic surface active agent having any one of the group consisting of phosphate, phosphinate and OP (OR) ₃ (phosphate), or a combination of hydrophilic surface active agents having any one of the above groups. The method according to any one of claims 10, 16 and 17,
Wherein forming the anti-fog layer comprises:
Wherein the mixture comprises 7 to 20 wt% of the hydrophilic agent, 75 to 92.999 wt% of the hard coating solution, and 0.001 to 5 wt% of the leveling agent.

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