KR20180138049A - Lamination systemd and electronic device - Google Patents

Abstract

The present invention relates to a stacking system which can realize various colors and has excellent hiding power, water resistance and flexibility, and to an electronic device including the same. The stacking system of the present invention comprises: a transparent substrate; and a functional layer on the transparent substrate.

Description

[0001] LAMINATION SYSTEM AND ELECTRONIC DEVICE [0002]

The present invention relates to a lamination system and an electronic apparatus including the same.

Recently, as the display market of smart phones, tablet PCs, and televisions is accelerating, the requirements of consumers using these electronic devices are becoming more and more advanced. In particular, we are constantly evolving to meet such requirements from software to hardware.

2. Description of the Related Art Recently, glass or tempered glass has been used as a material having excellent mechanical properties for a display window or a front plate of an electronic device. As the amount of transparent substrate such as glass or tempered glass is increased, Compositions have been developed for a variety of applications.

As one of these examples, a shielding coating composition which can be applied on a transparent substrate has been developed in various component formulations, and in general, white or black shielding coating compositions have been widely used. Such a coating composition for screening is required to have good adhesion, hiding power and flexibility between a transparent substrate or a coating layer. If the above properties are not satisfied, adverse effects on not only paint workability but also a satisfactory product aesthetically and functionally .

In addition, there is a need for a high-tech strategy for electronic devices that implements design elements in addition to specific functional elements in a coating layer using such a coating composition.

Therefore, it is possible to improve not only the adhesiveness between the transparent substrate and the coating layer but also the physical properties of the coating film such as hiding power, water resistance and flexibility, and it is possible to realize not only a simple shielding function but also various colors of a colored series, And to develop a lamination system using the same.

Korea Patent No. 2012-0132714

A first technical object of the present invention is to provide a laminated system capable of various color implementations of a colored series and excellent in hiding power, water resistance and flexibility.

In addition, a second technical object of the present invention is to provide an electronic apparatus including the above lamination system.

The present invention provides, in accordance with one embodiment, a transparent substrate, a functional layer on the transparent substrate.

In addition, the present invention provides an electronic apparatus including the above-described lamination system according to an embodiment.

The laminate system according to an embodiment of the present invention is excellent in not only the adhesion between the transparent substrate and the coating layer but also the coating film properties such as the hiding power and the scattering prevention property and the excellent durability of the laminate system such as heat- And it is possible to realize various colors of the colored series, so that the aesthetic function can be exhibited together.

Hereinafter, the present invention will be described in detail in order to facilitate understanding of the present invention.

The terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms and the inventor may appropriately define the concept of the term in order to best describe its invention It should be construed as meaning and concept consistent with the technical idea of the present invention.

A stacking system according to an embodiment of the present invention may include a transparent substrate, and a functional layer on the transparent substrate.

The lamination system according to an embodiment of the present invention has excellent adhesion to a transparent substrate, water resistance, flexibility, and hiding power, and it is possible to realize various colors unlike a general shielding layer of white or black.

Hereinafter, the present invention will be described in more detail.

<Transparent Substrate>

According to one embodiment of the present invention, the transparent substrate on which the functional layer can be formed may comprise glass, polyethylene terephthalate (PET), or glass / PET. The refractive index of the transparent substrate may be, for example, 1.50 to 1.52. The thickness of the transparent substrate may be in the range of, for example, 0.3 mm to 6 mm.

<Functional layer>

Meanwhile, in the lamination system according to an embodiment of the present invention, the functional layer included on the transparent substrate may include various functional layers according to a desired purpose. For example, the functional layer may include at least one functional layer selected from a primer layer having excellent adhesion to the transparent substrate, a shielding color layer having excellent color performance and hiding power, a UV layer, and a scattering- have.

Here, the shielding color layer may be a shielding film layer or a shielding coating layer, and the shielding color layer may further include a scattering-preventing coating layer or a scattering-preventing film layer as a scattering-preventing layer.

In the functional layer, when a shielding coating layer is used, the functional layer may further include a primer layer between the shielding coating layer and the transparent substrate.

<Shielding Color Layer>

The shielding color layer may be a shielding film layer using a shielding film conventionally used in the art, and may be a shielding coating layer formed by coating the composition.

Specifically, the shielding coating layer comprises, as a first composition, from 60 wt% to 80 wt% of a polyester resin having a solids content of from 20 wt% to 40 wt%, from 10 wt% to 30 wt% And 5% to 30% by weight of a solvent.

Hereinafter, specific examples of the first composition including a polyester resin, a pigment and a solvent will be described.

polyester  Suzy

The polyester resin contained in the first composition according to an embodiment of the present invention preferably has a solid content of 20% by weight to 40% by weight in order to impart adhesion between the transparent substrate and the coating layer and to impart a uniform distribution of the pigment, , Specifically 25% to 35% by weight of the polyester resin. If the solid content of the polyester resin is less than the above range, the adhesion between the substrate and the shielding coating layer and the physical properties of the coating film may be deteriorated. If the solid content exceeds the above range, the uniform distribution of the pigment may be impaired, .

The polyester resin may be 60% by weight to 80% by weight, specifically 60% by weight to 70% by weight, based on the total weight of the first composition. If the content of the polyester resin is less than 60% by weight, the adhesion to the substrate and the flexibility of the coating film may be lowered, and the chemical resistance may be degraded due to the lowering of the crosslinking density.

If the content is more than 80% by weight, flexibility may be improved, but the material and shielding force may be lowered due to the insufficient pigment content, and the workability may be poor.

The branched polyester resin may be branched or linear polyester resin, but in the case of the branched polyester resin, it is advantageous to produce a hard coating film as compared with a linear type polyester resin, It is possible to increase the degree of crosslinking.

On the other hand, the glass transition temperature is a thermal motion unit of the polymer, and the lower the glass transition temperature, the more elasticity is imparted to the coating film, which is advantageous in ensuring processability. The higher the glass transition temperature, the harder the coating film, Chemical properties can be secured.

Therefore, the first composition according to an embodiment of the present invention has a flexibility inherent in polyester and an excellent interlaminar adhesion, and also has excellent mechanical properties and a high mechanical strength by using a branched polyester and a resin having a relatively high glass transition temperature and a high molecular weight It may have chemical resistance.

The polyester resin may have a hydroxyl group of 5 to 10 mgKOH / g, a glass transition temperature (Tg) of 50 to 70 ° C, and a weight average molecular weight of 8000 to 12000 mol / g.

When the weight average molecular weight of the polyester resin is less than the above range, there is a problem that workability is difficult to obtain due to a short polymer chain, and when the weight average molecular weight exceeds the above range, the viscosity of the polyester resin increases, The spreadability may be weakened and the curing force may be lowered.

When the glass transition temperature of the polyester resin is less than the above range, there is a problem that the flexibility is excellent but the hardness is low and the coating layer is easily damaged. When the glass transition temperature of the polyester resin exceeds the above range, The hardness of the coating layer is rapidly increased and the workability is weakened, so that there is a problem that cracking and adhesiveness are weakened.

Specifically, the polyester resin may be a polyester resin which is a polycondensation product of a polyhydric alcohol component and a polyhydric carboxylic acid component. Examples of the polyhydric alcohol component include 1,6-hexanediol, 2,2 '' - [ (Methyl ethylidene) bis (4,1-phenyleneoxy)] bis ethanol, 1,4-cyclohexanedimethanol, ethane-1,2-diol, Dimethyl-1,3-propanediol, and combinations thereof. Examples of the polyvalent carboxylic acid component include 1,4-butanedicarboxylic acid, 1,3-benzenedicarboxylic acid, 1,4-benzene 1,2-dicarboxylic acid anhydride, and combinations thereof. Examples of the organic peroxides include dicarboxylic acid, 1,2,4-benzenetricarboxylic acid, isobenzofuran-1,3-dione (phthalic anhydride), cis- But is not limited thereto.

Pigment

The pigments included in the first composition according to an embodiment of the present invention may include a colored pigment for color implementation. For example, at least one selected from carbon black, calcium carbonate, titanium dioxide (TiO ₂ ), iron oxide yellow and iron oxide red.

In addition to the above-mentioned colored pigments, an extender pigment may be included to improve hiding power and water resistance. Specific examples thereof may include at least one selected from silica, barium sulfate, talc and calcium carbonate. When the extender pigment is included, not only hiding power and water resistance but also workability and adhesiveness can be further improved.

The content of such a pigment may be 10% by weight to 30% by weight based on the total weight of the first composition. More specifically, it may be 2% by weight to 10% by weight of a colored pigment for color implementation such as carbon black, and 10% by weight to 20% by weight of an extender pigment. More specifically, the pigment may contain an extender pigment and a color pigment in a weight ratio ranging from 1: 0.1 to 1: 1, and when the weight ratio is satisfied, a desired color implementation, hiding power and water resistance are optimally improved . When the content of the pigment is out of the above range, the strength of the first composition may be lowered, viscosity control may be difficult to impart the desired color, and water resistance and hiding power may be lowered.

solvent

The first composition according to an embodiment of the present invention may include a solvent to improve the painting workability and impart leveling property.

Various solvents may be used as long as they do not impair the above object. Examples thereof include non-polar solvents such as n-heptane, toluene, xylene, petroleum compounds and n-hexane; Ethyl acetate, n-butyl acetate, isobutyl acetate, ethylene glycol monoethyl ether acetate, dibasic ester, 3-methoxybutyl acetate, amyl acetate, butyl glycol acetate, methyl ethyl ketone, methyl isobutyl ketone, Polar solvents such as butyl ketone, isophorone and cyclohexanone; And a mixture of the nonpolar solvent and the polar solvent may be appropriately selected depending on the characteristics of the resin and the rate of volatilization.

According to one embodiment of the present invention, the solvent may be contained in an amount of 5% by weight to 30% by weight based on the total weight of the first composition. When the above range is satisfied, the leveling property and the painting workability can be further improved.

additive

The first composition according to an embodiment of the present invention may further include an additive. For example, a dispersant may be included to impart uniform particle distribution of the pigment and to impart viscosity and storage stability.

The dispersant may include a dispersant containing a polyurethane having a weight average molecular weight of 7000 to 8000 g / mol as a main chain and a polyester having a weight average molecular weight of 1000 to 2000 g / mol as a side chain . The dispersing agent may be a polymer wetting and dispersing agent, for example, BYK-104S or TILOSPERSE 32500S. The content of the dispersant may be 1 wt% to 2.0 wt%. If the content of the dispersant is less than 1% by weight, there may be a problem in pigment dispersion. If the content of the dispersant is more than 2.0% by weight, the dispersibility of the raw material may be increased.

The first composition according to an embodiment of the present invention by the dispersant may comprise a dispersion having an average particle size (D50) of 5 to 15 mu m, specifically 8 to 13 mu m. The average particle size can further improve the flexibility and adhesion of the coating layer.

The first composition according to an embodiment of the present invention may further include a silicon-based additive for leveling and imparting surface slip with surface tension. The silicone additive may be an organopolysiloxane having a viscosity in the range of 90 to about 110 cSt at 25 캜. The silicone-based additive may include a silicone compound in which the organic substituent includes, for example, methyl, vinyl, phenyl, or a combination thereof, and specifically includes any one selected from the group consisting of polydimethylsiloxane and polymethylalkylsiloxane, And mixtures of two or more.

The silicone additive may be included in an amount of 1 wt% to 5 wt% based on the total weight of the first composition. When the above range is satisfied, the leveling and surface slip property can be improved.

In addition, according to one embodiment of the present invention, the first composition may contain additives such as extenders, photoinitiators, adhesion promoters, heat stabilizers, flame retardants, UV stabilizers, Chain extenders, fillers, and other additives such as moisture removing agents.

The shielding coating layer can be applied by directly applying the first composition on the substrate or by being produced in the form of a film and laminated or adhered on the substrate.

For example, according to one embodiment of the present invention, when the first composition is directly applied to a substrate, for example, a transparent substrate or a primer layer applied on a transparent substrate as described below, the application method is not particularly limited And may be performed by, for example, a method such as die coater, air knife, reverse roll, spray, blade, casting, gravure, spin coating and the like.

After the coating step, a step of drying or curing can be further performed, and the curing method is not particularly limited. For example, photo-curing or thermosetting may be performed alone, or after photo-curing, photo-curing, and after photo-curing, photo-curing or the like.

As another example, the film may be manufactured in a film type in a conventional manner and laminated or attached to a transparent substrate.

The thickness of the shielding coating layer may be 10 to 20 mu m. If the thickness of the shielding coating layer is less than 10 mu m, the effect of hiding power, water resistance and color may be negligible. When the thickness of the shielding coating layer is more than 20 mu m, .

The shielding coating layer formed using the first composition according to an embodiment of the present invention can improve the adhesion between the transparent substrate such as glass or tempered glass and the coating layer, the flexibility of the coating film, the hiding power and the water resistance, It is possible to realize diverse colors of the series, enabling deep and soft color feeling and fine texture of ceramic while using glass material.

<Shatterproof layer>

According to an embodiment of the present invention, the anti-scattering layer may be a anti-scattering film layer using a anti-scattering film commonly used in the art, and may be a anti-scattering coating layer formed by coating the composition.

Specifically, the anti-scattering coating layer may be a second composition comprising 20 to 40% by weight of a first urethane acrylate oligomer having 2 to 3 functional groups, 2 to 4 functional groups, and a second urethane acrylate having 2 to 4 functional groups, A second composition comprising 5 wt% to 25 wt% of an oligomer, 5 wt% to 20 wt% of an acrylate monomer, 1 wt% to 5 wt% of a photoinitiator, and 10 wt% to 50 wt% of a solvent have.

Hereinafter, specific examples of a second composition comprising a first urethane acrylate oligomer having 2 to 3 functional groups, a second urethane acrylate oligomer having 2 to 4 functional groups, an acrylate monomer, a photoinitiator, and a solvent will be described.

Functional group  A first urethane Acrylate  Oligomer

The second composition according to an embodiment of the present invention may include a first urethane acrylate oligomer having 2 to 3 functional groups to improve adhesion to the glass and the material, flexibility of the coating film, and elongation. The first urethane acrylate oligomer having 2 to 3 functional groups may be included in an amount of 20 wt% to 40 wt%, specifically 25 wt% to 35 wt% based on the total weight of the second composition. If the first urethane acrylate oligomer having 2 to 3 functional groups is used in an amount of less than 20% by weight, the flexibility may be lowered and the effect of preventing the scattering may be deteriorated. If it exceeds 40% by weight, the surface flexibility, There may be a problem in interlayer adhesion.

According to one embodiment of the present invention, the first urethane acrylate oligomer having 2 to 3 functional groups is an important factor for determining the flexibility and elongation of a coating film, and has a weight average molecular weight of 2000 to 4000 g / mol, And may range from 2500 to 3500 g / mol. If the weight average molecular weight of the first urethane acrylate oligomer having 2 to 3 functional groups is less than the above range, the crosslinking efficiency and the intermolecular bonding force may be lowered and the scattering preventing efficiency may be lowered. When the weight average molecular weight exceeds the above range, The workability due to the late interlayer adhesion and viscosity increase may become poor.

Specific examples of the first urethane acrylate oligomer include CHTU-2942T of Chemton Co., Ltd., and the like.

Functional group  A second urethane resin having 2 to 4 Acrylate  Oligomer

The second composition according to an embodiment of the present invention can be used together with a glass substrate or the like to prevent glass scattering and to impart surface hardness and to improve the glass and interlaminar adhesion, a second urethane acrylate oligomer having 2 to 4 functional groups . &Lt; / RTI &gt; The second urethane acrylate oligomer having 2 to 4 functional groups may be contained in an amount of 5 wt% to 25 wt% based on the total weight of the second composition. If the second urethane acrylate oligomer having 2 to 4 functional groups is used in an amount of less than 5% by weight, the appearance and surface hardness may be lowered. If the second urethane acrylate oligomer is used in an amount exceeding 25% by weight, .

According to an embodiment of the present invention, the second urethane acrylate oligomer having 2 to 4 functional groups is an important factor that determines glass scattering prevention and surface hardness in particular, and has a weight average molecular weight of 2000 to 4000 g / mol, May range from 2500 to 3000 g / mol. If the weight average molecular weight of the second urethane acrylate oligomer having 2 to 4 functional groups is less than the above range, the crosslinking efficiency and the intermolecular bonding force may be lowered. If the weight average molecular weight exceeds the above range, This can be bad.

Specific examples of the second urethane acrylate oligomer include CHTU-2262 and the like.

According to an embodiment of the present invention, the weight ratio of the first urethane acrylate oligomer (A) and the second urethane acrylate oligomer (B) is in the range of 1: 0.3 to 1: 1.2, specifically 1: 0.4 to 1: 0.6. If the weight ratio deviates from the above range, the scattering performance may be lowered, the surface hardness, and the interlayer adhesion force of the base material and the coating material may be reduced.

Acrylate series  Monomer

The second composition according to an embodiment of the present invention may include an acrylate-based monomer to improve the degree of crosslinking and the adhesion. The acrylate-based monomer may be included in an amount of 5% by weight to 20% by weight, specifically 5% by weight to 15% by weight based on the total weight of the second composition. If the content of the acrylate monomer is less than 5% by weight, the crosslinking degree and the adhesive force and the coating workability may be deteriorated. If the content of the acrylate monomer exceeds 20% by weight, the flexibility of the coating film may be deteriorated.

The acrylate-based monomer can be used without limitation within the range satisfying the above effects, but specifically, those having 1 to 6 functional groups can be used. For example, the acrylate-based monomer may be selected from the group consisting of 2-ethylhexyl acrylate, octadecyl acrylate, isodecyl acrylate, 2-phenoxyethyl acrylate, lauryl acrylate, stearyl acrylate, Acrylate, isobornyl acrylate, tetrahydrofurfuryl acrylate, tetrahydroperfuryl methacrylate, 4-butylcyclohexyl acrylate, 2-ethylhexyl acrylate, Dicyclopentenyl methacrylate, dicyclopentenyl acrylate, dicyclopentenyloxyethyl acrylate, ethoxyethoxyethyl acrylate, ethoxylated monoacrylate, 1,6-hexanediol diacrylate, triphenyl glycol diacrylate, butanediol Diacrylate, 1,3-butylene glycol dimethacrylate, 1,6-hexanediol dimethacrylate Acrylates such as ethylene glycol dimethacrylate, diethylene glycol diacrylate, diethylene glycol dimethacrylate, tetraethylene glycol, diacrylate, tetraethylene glycol dimethacrylate, triethylene glycol dimethacrylate, But are not limited to, glycol diacrylate, triethylene glycol dimethacrylate, polyethylene glycol diacrylate, polyethylene glycol dimethacrylate, dipropylene glycol diacrylate, ethoxylated neopentyl glycol diacrylate, trimethylolpropane triacrylate (Meth) acrylate, trimethylolpropane trimethacrylate, pentaerythritol triacrylate, ethoxylated triacrylate and tris (2-hydroxyethyl) isocyanurate triacrylate, dipentaerythritol pentaacrylate , Ditrimethylolpropane tetraacetate Rate and alcohol during federated may be used at least one selected from tetra-acrylate.

Photoinitiator

The second composition according to an embodiment of the present invention may include a photoinitiator to absorb ultraviolet rays to give a radical reaction, and to satisfy fast curability and high degree of crosslinking. The photoinitiator may be included in an amount of 1 wt% to 5 wt%, specifically 1 wt% to 3 wt% based on the total weight of the second composition. If the content of the photoinitiator is less than 1% by weight, the ultraviolet absorption and radical reaction effects may be deteriorated and the curability and the degree of crosslinking may be deteriorated. If the content of the photoinitiator exceeds 5% by weight, Adhesion and abrasion may be adversely affected.

The photoinitiator may be a conventional photoinitiator having an absorption band in the ultraviolet region of 250 to 450 nm. Benzophenone, acetophenone, benzyldimethylketal anthraquinone, and thioxanthone may be used. Specific examples thereof include 1-hydroxycyclohexyl phenyl ketone, 4-phenylbenzophenone, 2,4,6-trimethylbenzoyl phenylphosphine oxide, 2-hydroxy 1,2-diphenylphenylethanone, 2- Diphenylethanone, 2-isopropyl 1,2-diphenylethanone, 2-butoxy 1,2-diphenylethanone, 2-isobutoxy 1,2- , 2-dimethoxy 1,2-diphenylethanone, 2,2-dibutoxy 1-phenylethanone, 1-hydroxycyclohexyl phenyl ketone, dimethoxyhydroxyacetophenone, 1- 2-methylpyrrolidinone, 2-methyl-1- (4-methylphenyl) Phenyl) -butanone and 3,6-bis (2-methyl-2-morpholino-propanonyl) -9-butylcarbazole.

solvent

The second composition according to an embodiment of the present invention may include a solvent to improve paint workability and impart leveling property.

Various solvents may be used as long as they do not impair the above object. Examples thereof include non-polar solvents such as n-heptane, toluene, xylene, petroleum compounds and n-hexane; Ethyl acetate, n-butyl acetate, isobutyl acetate, ethylene glycol monoethyl ether acetate, dibasic ester, 3-methoxybutyl acetate, amyl acetate, butyl glycol acetate, methyl ethyl ketone, methyl isobutyl ketone, Polar solvents such as butyl ketone, isophorone and cyclohexanone; And a mixture of the nonpolar solvent and the polar solvent may be appropriately selected depending on the characteristics of the resin and the rate of volatilization.

According to one embodiment of the present invention, the solvent may be contained in an amount of 10% by weight to 50% by weight based on the total weight of the second composition. Specifically, the solvent may be contained in an amount of 5% by weight to 30% by weight of the nonpolar solvent and 5% by weight to 30% by weight of the polar solvent. More specifically, the solvent may include a polar solvent in a weight ratio of 1: 0.1 to 1: Ratio can be used. When the above range is satisfied, the leveling property and the painting workability can be further improved.

additive

The second composition according to an embodiment of the present invention may further include a silicon-based additive for leveling by surface tension and imparting surface slip property.

The silicone additive may be an organopolysiloxane having a viscosity in the range of about 90 to 110 cSt at 25 캜. The silicon-based additive may include a silicon-based compound in which the organic substituent includes, for example, methyl, vinyl or phenyl or a combination thereof. Specifically, any one selected from the group consisting of polydimethylsiloxane, or a mixture of at least one thereof, .

The silicone-based additive may be included in an amount of 1 wt% to 3 wt% based on the total weight of the second composition. When the above range is satisfied, the leveling and surface slip property can be improved.

In addition, according to an embodiment of the present invention, the second composition may contain pigments, extenders, adhesion promoters, heat stabilizers, flame retardants, UV stabilizers, Chain extenders, fillers, and other additives such as moisture removing agents.

Meanwhile, the present invention can provide a non-acid spray coating layer formed by the second composition according to an embodiment.

Specifically, the second scattering coating layer may be formed by applying the second composition directly on the transparent substrate or the shielding color layer, or may be manufactured in the form of a film and laminated or adhered on the shielding color layer.

For example, according to one embodiment of the present invention, the second composition may be applied, for example, on a shielding color layer as described above, and in this case, the application method is not particularly limited. The coating method can be carried out by, for example, a die coater, an air knife, a reverse roll, a spray, a blade, a casting, a gravure or a spin coating.

After the coating step, the step of drying or curing can be further performed. The curing method is not particularly limited. For example, the photocuring or thermosetting may be performed alone or after photo-curing, Or the like.

As another example, it can be made into a film type in a conventional manner and laminated or attached to a shielded color layer or to a desired material.

The thickness of the anti-scattering layer may be 30 to 50 탆. If the thickness of the anti-scattering layer is less than 30 mu m, the scattering prevention effect may be insignificant. When the thickness of the anti-scattering layer is larger than 50 mu m, Incidentally, the term "anti-scattering effect" may mean an effect of preventing the broken glass from destroying and scattering the anti-scattering film.

The anti-scattering layer in which the second composition according to one embodiment of the present invention is directly applied or laminated in the form of a film can provide excellent adhesion between the transparent substrate such as glass or tempered glass and the coating layer, And the phenomenon that the glass is scattered by implementing the elongation can be prevented.

<Primer Layer>

In the case where the above-described shielding coating layer is used for the functional layer, the shielding coating layer and the transparent substrate may further include a primer layer to improve the adhesion of the transparent substrate.

Specifically, the primer layer comprises, as the third composition, 60 to 80% by weight of an acrylic resin having a solid content of 7 to 18% by weight, 10 to 40% by weight of a solvent and 1 to 40% % &Lt; / RTI &gt; to 5% by weight of the composition.

Specific examples of the third composition including an acrylic resin, a solvent and an additive having a solid content of 7 wt% to 18 wt% will be described below.

The solids content is 7 weight%  To 18 % By weight  Acrylic resin

The third composition according to an embodiment of the present invention improves the leveling property, the transparency, and the shedding property while improving the adhesion to the transparent substrate, for example, glass or tempered glass, and for the easy adhesion of the shielding color layer , It may contain an acrylic resin having a solid content of 7 wt% to 18 wt%.

Specifically, the acrylic resin has a solid content of 7 to 18% by weight with respect to the resin, a solvent content of 82 to 93% by weight, specifically, a solid content of 10 to 15% by weight, Type acrylic resin having a content of 85% by weight to 90% by weight. At this time, the solvent may include a solvent such as water, an alcohol, and glycol. If the solid content of the acrylic resin is less than 7% by weight, the adhesion to the transparent substrate and the resistance to hot water resistance may be deteriorated. If the solid content exceeds 18% by weight, the leveling property may deteriorate, There may be a problem.

According to one embodiment of the present invention, the acrylic resin having a solid content of 7 wt% to 18 wt% is contained in an amount of 60 wt% to 80 wt%, more specifically 65 wt% to 75 wt% Can be included in the amount. If the content of the acrylic resin is less than the above range, the adhesion to the transparent substrate may be deteriorated and the resistance to hot water may be deteriorated. In addition, if it exceeds the above range, the spraying workability may be adversely affected, the smoothness of the coating film may be deteriorated, and the leveling property, transparency and sagging may be deteriorated.

The acrylic resin preferably has a hydroxyl group content of 25 to 50 mgKOH / g, specifically 30 to 45 mgKOH / g, a glass transition temperature (Tg) of 60 to 80 ° C and a weight average molecular weight of 18000 to 22000 mol / g have. Examples of the acrylic resin include acrylic acid, methyl acrylate, ethyl acrylate, isopropyl acrylate, n-butyl acrylate, isobutyl acrylate, methacrylic acid, methyl methacrylate, ethyl methacrylate, isopropyl methacrylate, N-butyl acrylate, n-butyl acrylate, and isobutyl methacrylate.

solvent

The third composition according to an embodiment of the present invention may include a solvent to improve paint workability and impart leveling property.

Various solvents may be used as long as they do not impair the above object. Examples thereof include non-polar solvents such as n-heptane, toluene, xylene, petroleum compounds and n-hexane; Ethyl acetate, n-butyl acetate, isobutyl acetate, ethylene glycol monoethyl ether acetate, dibasic ester, 3-methoxybutyl acetate, amyl acetate, butyl glycol acetate, methyl ethyl ketone, methyl isobutyl ketone, Polar solvents such as butyl ketone, isophorone and cyclohexanone; And a mixed solvent of the non-polar solvent and the polar solvent.

According to one embodiment of the present invention, the solvent may be contained in an amount of 10% by weight to 40% by weight based on the total weight of the third composition. Specifically, the solvent may be contained in an amount of 5 to 15% by weight of the nonpolar solvent and 15 to 30% by weight of the polar solvent. More specifically, the nonpolar solvent and the polar solvent may be contained in an amount of 1: 0.5 to 1: Ratio can be used. When the above range is satisfied, the leveling property and the painting workability can be further improved.

additive

The third composition according to an embodiment of the present invention may include a leveling agent for leveling and preventing sagging using surface tension.

A leveling agent is a problem in which a coating film after a coating appears as a convex or concave wave shape due to a partial difference in surface tension. In this case, a surface leveling action is distributed on the surface of the coating film to solve such problems, Lt; / RTI &gt; Coatings with good leveling properties generally have a good gloss and a clean surface appearance.

According to an embodiment of the present invention, the leveling agent may be included in an amount ranging from 0.01% by weight to 5% by weight, specifically 0.01% by weight to 1% by weight based on the total weight of the third composition.

The leveling agent may include, for example, an acrylic leveling agent having a weight average molecular weight of 2000 to 3000 mol / g. For example, BYK-358N may be used.

In addition, according to an embodiment of the present invention, the third composition may contain pigments, extenders, photoinitiators, adhesion promoters, heat stabilizers, flame retardants, UVs, etc., which are conventionally used within the range of not impairing the physical properties of the present invention, Stabilizers, chain extenders, fillers, and other additives such as moisture removing agents.

According to an embodiment of the present invention, there is provided a lamination system comprising a transparent substrate and a shielding coating layer, wherein the lamination system further comprises a primer layer between the shielding coating layer and the transparent substrate.

Specifically, the third composition may be applied to one side of a transparent substrate, for example, a glass substrate to form a primer layer. The thickness of the primer layer may be, for example, 2 to 8 탆, specifically 3 to 6 탆. The primer layer improves the interfacial adhesion between the glass substrate and the shielding coating layer applied on the primer layer, and can provide an excellent leveling property, transparency and sagging property.

The method of applying the third composition is not particularly limited and can be performed by a conventional method such as die coater, air knife, reverse roll, spray, blade, casting, gravure, spin coating and the like.

For example, in the case of using the spray coating method, the transparent substrate is fixed on the jig, and uniformly coated on the surface of the substrate using a spray gun, and then left at about 60-80 DEG C for 5 minutes to 30 minutes to form a primer layer A transparent coating film can be obtained.

As another example, the air pressure may be 3-5 kg / cm ² , the coating method may be an air and paint mixed discharge method, the drying method may be an oven or a conveyor heat drying method, for example, And left for a minute to form a primer layer, whereby a transparent coating film can be obtained.

Furthermore, according to an embodiment of the present invention, various structures can be implemented using the stacking system. That is, other various coating layers may be coated or laminated on another surface of the laminate system on which the base layer is not formed.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to examples. However, the embodiments according to the present invention can be modified into various other forms, and the scope of the present invention should not be construed as being limited to the embodiments described below. The embodiments of the present invention are provided to enable those skilled in the art to more fully understand the present invention.

Example

Example 1

&Lt; Preparation of primer composition >

Acrylic resin (acrylic resin 1) having a solid content of 15% by weight, a hydroxyl group of 33 mgKOH / g, a weight average molecular weight of 20,000 g / mol and a glass transition temperature (Tg) A mixed solvent of 19% by weight of methyl isobutyl ketone and 10% by weight of toluene, and 1% by weight of an acrylic-based lubricating agent (BYK, BYK-358N) were put into a vessel and mixed at a low speed using a stirrer. A solvent was further added as needed to adjust the viscosity to 45 to 55 KU when measured with a KU viscometer to obtain a primer composition.

&Lt; Preparation of shielding coating composition >

A solid content of 30% by weight, a hydroxyl group of 7 mgKOH / g, a weight average molecular weight of 10,000 g / mol, glass transition temperature (Tg) 60 DEG C (TILOSPERSE 32500S) and a silicone additive (BYK-306 (trade name)) as a color pigment, barium sulfate as an extender pigment, methyl isobutyl ketone and toluene as a solvent, ) Was charged into a dispersing tank and stirred to prepare a shielding coating composition.

&Lt; Preparation of anti-scattering coating composition >

30 wt% of a first urethane acrylate oligomer (CHTU-2942T) having two functional groups having a solid content of 100 wt% and a weight average molecular weight (Mw) of 3000 g / mol, three functional groups having a solid content of 100 wt% , 15 wt% of a second urethane acrylate oligomer (CHTU-2262) having a molecular weight Mw of 3000 g / mol, 10 wt% of trimethylolpropane triacrylate as an acrylate monomer, 2.5 wt% of IRGACURE 651 as a photoinitiator Anti-scattering coating composition was prepared using 20 wt% of methyl isobutyl ketone (MIBK) as a solvent, 21.5 wt% of toluene, and 1 wt% of a silicone additive (GLIDE 410) having a solid content of 100 wt% as an additive .

&Lt; Manufacture of laminated system &

The primer composition was coated on a glass substrate having a thickness of 0.5 mm so as to have a dry coating film thickness of an average thickness of 5 占 퐉 and dried to form a primer layer. Thereafter, the above-mentioned shielding coating composition was coated on the primer layer so as to have a dry coating thickness of an average thickness of 13 탆, and then dried at 60 to 80 캜 for 5 minutes or more to obtain a shielding coating layer. Thereafter, the anti-scattering coating composition is coated on the shielding coating layer so as to have a dry film thickness of an average thickness of 40 占 퐉, and then cured to a radiation dose of 800 to 1200 mj / cm2 using a UV curing machine to form a anti- To obtain a lamination system.

Example 2

In the above lamination system, a lamination system was obtained in the same manner as in Example 1, except that only the shielding coating layer and the anti-scattering layer were formed (except for the primer layer).

Example 3

A lamination system was obtained in the same manner as in Example 1, except that only the primer layer and the shielding coating layer were formed in the lamination system (except for the scattering-inhibiting layer).

Example 4

A 20 mu m-thick shielding film was bonded to a glass substrate having a thickness of 0.5 mm and a 50 mu m thick anti-scattering film was bonded on the shielding film to form a lamination system.

Experimental Example

1) Adhesion: The degree of the peeled portion was observed after the tape adhesion test among 100 pieces of 11 mm x 11 mm scale according to the ASTM D3359 tape adhesion test method. In the case of normal, it is usually (?), Peeling occurs, and when it is inferior, it is determined as defective (X).

2) Concealability: It is measured whether the manufactured laminate system is visually transmitted, and when the back side of the substrate is not permeable, the result is excellent (⊚), when the transmission is weak, it is usually (?), (X). &Lt; tb &gt; &lt; TABLE &gt;

3) Shatter Resistance: The tensile speed was kept constant at 300 mm / min. After the above-described lamination system was bonded to a jig, 200 g of metal balls were freely dropped at a height of 300 mm to break the glass substrate, And observed with naked eyes. Excellent (⊚) when the glass pieces were hardly scattered, good (△) when a part was scattered, and poor (X) when a lot of scattered pieces were generated.

4) Heat-Resistant Peelability: The laminate system prepared above was allowed to stand in an environment of 23 ° C and 50% RH for 1 hour, and then the laminate system was placed in an autoclave. The laminate system was conditioned under conditions of a temperature of 150 ° C and a pressure of 0.5 MPa Lt; / RTI &gt; for 24 hours. The laminate system was then removed from the autoclave and left at room temperature (23 DEG C) for 30 minutes. Using a microscope and a naked eye, the presence or absence of foaming was observed in the lamination system. When the foaming was not observed in the lamination system, the heat peelability of the lamination system was evaluated as excellent (⊚), and when a slight foaming was observed in the lamination system, it was evaluated as normal (△) X).

5) Humidity resistance stability: The laminate system prepared above was allowed to stand in an environment of 23 ° C. and 60% RH for 1 hour, put in a constant temperature and humidity chamber set at a temperature of 60 ° C. and a humidity of 95% RH, Respectively. The lamination system was taken out from the constant temperature and humidity bath and allowed to stand at room temperature (23 DEG C) for 30 minutes. The presence or absence of opacity in the lamination system was visually observed. In the case where no clouding phenomenon was observed in the lamination system, the humidity resistance stability of the lamination system was evaluated as excellent (⊚), and when a slight cloudiness was observed in the lamination system, ).

Example 1 Example 2 Example 3 Example 4 Attachment ◎ △ ◎ △ Hiding power ◎ ◎ ◎ ◎ Shatterproof ◎ ◎ X ◎ Heat-resisting peelability ◎ △ ◎ X Humidity stability ◎ ◎ △ △

Claims (9)

Transparent substrate, and
And a functional layer on the transparent substrate.
The method according to claim 1,
Wherein the functional layer comprises a shielded color layer.
The method of claim 2,
Wherein the shielding color layer is a shielding film layer or a shielding coating layer.
Claim 2
Further comprising a light scattering coating layer or a light scattering film layer on the shielding color layer.
The method of claim 3,
And a primer layer between the shielding coating layer and the transparent substrate.
The method of claim 3,
Wherein the shielding coating layer comprises, relative to the total weight of the first composition,
From 60% to 80% by weight of a polyester resin having a solid content of 20% by weight to 40% by weight,
10% to 30% by weight of pigment, and
And 5% to 30% by weight of a solvent.
The method of claim 4,
The anti-scattering coating layer comprises, relative to the total weight of the second composition,
20 to 40% by weight of a first urethane acrylate oligomer having 2 to 3 functional groups,
5 to 25% by weight of a second urethane acrylate oligomer having 2 to 4 functional groups,
5 to 20% by weight of an acrylate monomer,
1% to 5% by weight of a photoinitiator, and
From 10% to 50%
&Lt; / RTI &gt;
The method of claim 5,
Wherein the primer layer comprises, relative to the total weight of the third composition,
60 to 80% by weight of an acrylic resin having a solid content of 7 to 18% by weight,
10 wt% to 40 wt% solvent, and
And from 1 wt% to 5 wt% of an additive.
An electronic device comprising the lamination system of claim 1.