KR20130120203A - Anti-glare coating composition for water-blackboard and film sheet using the same material and method for thereof - Google Patents

Abstract

The invention relates to an anti-glare coating composition for a water blackboard, a film sheet using the anti-glare coating composition and a manufacturing method for the film sheet using the anti-glare coating composition and provides the anti-glare coating composition for a water blackboard comprising 5-40 parts by weight of oligomer, 2-15 parts by weight of monomer, 1-10 parts by weight of photopolymerization initiator, and 10-50 parts by weight of matting particles; the film sheet which includes an anti-glare coating layer on one side of a first material by using the anti-glare coating composition; and the manufacturing method for the film sheet using the anti-glare coating composition. The film sheet for a water blackboard, which has low glariness, excellent tactile feeling, excellent cleanness and high surface strength and facilitates construction and replacement, can be manufactured by using the anti-glare coating composition for a water blackboard prepared by the present invention. [Reference numerals] (AA) Anti-glare coating layer;(BB) First fabric

Description

Anti-Glare coating composition for water-blackboard and film sheet using the same material and method for

The present invention relates to a matte coating composition for a water-based board, a film sheet using the same, and a method of manufacturing the same.

Chalkboard, widely used as a communication medium, is written using chalk, and chalk is written on the surface of the blackboard by broken chalk powder due to friction with the blackboard. However, in the process of erasing the contents written in chalk on the blackboard, the chalk powder on the surface of the blackboard is dropped and the indoor air pollution in the classroom may be a cause of respiratory diseases.

In order to solve this problem, a white board, which is a substitute for the blackboard, may be used, but there are disadvantages such as an increase in eye fatigue due to a white color and a high surface reflectivity, and odor for the volatile solvent of the macaboard pen.

In addition, in terms of the manufacturing process, the blackboard is produced by spray coating the paint on a wooden board such as plywood, and the white board is manufactured by applying a synthetic resin to the iron sheet and then curing it. However, there is a problem in that physical and time burdens such as cost, construction method and replacement period for maintenance and replacement of the blackboard and white board that have passed their lifespan are great.

One aspect of the present invention is to provide a matte coating composition for a water board, which is free of indoor air pollution and provides excellent writing and wipeability.

In addition, another aspect of the present invention is to provide a film sheet for painting using the matting coating composition for the blackboard and a method of manufacturing the same.

According to one embodiment of the present invention, 5-40 parts by weight of oligomer, 2-15 parts by weight of monomer; 1-10 parts by weight of a photopolymerization initiator; And it provides a matte coating composition for water board comprising 10-50 parts by weight of matting particles.

The oligomers include acrylates which are epoxy acrylate, urethane acrylate, polyester acrylate, silicone acrylate, polyether acrylate, polyol acrylate, melamine acrylate and mixtures thereof; Epoxy resin; Methacrylates which are polyester methacrylate, polyether methacrylate, and mixtures thereof; Unsaturated polyesters; Styrene resins; And it may be selected from the group consisting of a mixture thereof.

The monomers include acrylic acid esters such as 2-ethyl methylhexyl acrylate, methoxyethyl acrylate, butyl acrylate, and mixtures thereof; Unsaturated carboxylic acid amides that are acryl amide, methacrylamide, and mixtures thereof; Polyfunctional compounds which are dipropylene glycol diacrylate, ethylene glycol acrylate, propylene glycol dimethacrylate, diethylene glycol dimethacrylate and mixtures thereof; Substituted amino alcohol-esters of unsaturated acids; Styrene monomers which are styrene, c-methylstyrene and mixtures thereof; Polythiol compounds that are trimetholpropane trithioacrylate, trimetholpropane trithiopropylate, pentaerythritol tetrathioglycol and mixtures thereof; And it may be selected from the group consisting of a mixture thereof.

The photoinitiator is camphor quinone, s-naphthol, 2,4-diethyl thioxanthone, trimethyl benzoyldiphenylsulpinoxide, dimethylamino ethyl methacrylate, n-butylamine, triethylamine, 4-dimethylaminobenzoic acid Isoamyl, hydrosilanes, sulfonylhydrazide derivatives and mixtures thereof.

The matting particles are polymethyl methacrylate, ethyl methacrylate, normal butyl methacrylate, isobutyl methacrylate, acrylamide, metyrol acrylamide, glycidyl methacrylate, ethyl acrylate, normal butyl acrylate. Isobutyl acrylate and a mixture thereof; Olefins which are polyethylene, polystyrene, polypropylene, and mixtures thereof; Silicon-based; Precipitated silica, fumed silica, colloidal silica; And it may be selected from the group consisting of a mixture thereof.

The size of the matting particles may be 1-30㎛.

The matting coating composition may further comprise 20 to 80 parts by weight of an organic solvent.

The organic solvent is methyl ethyl ketone, acetone, methyl butyl ketone, methyl isobutyl ketone and ketones which are mixtures thereof; Alcohols which are methyl alcohol, ethyl alcohol, isopropyl alcohol and mixtures thereof; Aromatic hydrocarbons which are benzene, toluene, xylene and mixtures thereof; Esters which are ethyl acetate, butyl acetate and mixtures thereof; And it may be selected from the group consisting of a mixture thereof.

According to still another embodiment of the present invention, there is provided a film sheet manufacturing method for a sheet of paint comprising the step of forming a matting coating layer by using the matting coating composition for the blackboard on one surface of a first fabric.

In the method of manufacturing a film sheet for the blackboard, the first fabric may be coated with a primer.

In the method of manufacturing a sheet of film for the blackboard, the first fabric may be a PET film.

As another embodiment of the present invention, the first fabric and the matte coating layer formed of the matte coating composition, the matte coating layer provides a film sheet for the water sheet with a surface roughness (Ra) of 3 ~ 15㎛.

In the film sheet for the blackboard, the first fabric may be one having a primer layer.

In the film sheet for the blackboard, the first fabric may be a PET film.

In the film sheet for the blackboard, the second fabric may be further laminated on the lower surface of the first fabric.

By manufacturing a film sheet using the matting coating composition for a water-based board according to the present invention, a film sheet for a water-based board with less glare, excellent writing feeling, wiping property and surface strength, and easy construction and replacement can be obtained.

1 schematically shows a film sheet for a water-colored board having a matte coating layer formed on a first fabric.
FIG. 2 schematically shows a film sheet for a water-coated board on which a second fabric is laminated on a lower surface of the first fabric having a matte coating layer formed thereon.
FIG. 3 schematically illustrates a film sheet for a paint board further comprising a printing layer and an adhesive layer on the film sheet for a paint board of FIG. 1.
FIG. 4 schematically illustrates a film sheet for a paint board further comprising a primer layer, a printing layer, an adhesive layer, and an adhesive layer on the film sheet for a paint board of FIG. 2.

The present invention provides a composition of a matte coating composition used for matte coating, which is a key step in the manufacture of a water-coated board, a film sheet for a chalkboard using the matte coating composition, and a method of manufacturing the same.

For blackboard Quenching  Coating composition

The matting coating layer for the blackboard of the present invention is formed on the top surface of the film sheet using the matting coating composition. The matte coating layer plays a role of diffusely reflecting light on the surface of the board, thereby securing visibility and reducing eye fatigue, and in particular, determines major physical properties such as writing, color development, wipeability and durability.

The matting coating composition includes an oligomer, a monomer, a photopolymerization initiator, and a matting particle, and may further include an organic solvent. Oligomers, monomers, photopolymerization initiators, quenching particles, the type of solvent and the amount of each of the inputs affect the main physical properties of the above-described water board, and also act as a significant variable on the appearance of the coated surface.

The oligomer and monomer serve as a binder for supporting the matting particles, among which the oligomer is epoxy acrylate, urethane acrylate, polyester acrylate, silicone acrylate, polyether acrylate, polyol acrylate, melamine acrylate and these Acrylates which are mixtures of; Epoxy resin; Methacrylates which are polyester methacrylate, polyether methacrylate, and mixtures thereof; Unsaturated polyesters; Styrene resins; And mixtures thereof.

The oligomer may be used in the range of 5-40 parts by weight. If the content of the oligomer is less than 5 parts by weight, it is difficult to secure the basic physical properties of the coating film, and if the content of the oligomer exceeds 40 parts by weight, the viscosity is increased and the workability and coating property are lowered.

The monomers include acrylic acid esters such as 2-ethyl methylhexyl acrylate, methoxyethyl acrylate, butyl acrylate, and mixtures thereof; Unsaturated carboxylic acid amides that are acrylamide, methacrylamide, and mixtures thereof; Polyfunctional compounds which are dipropylene glycol diacrylate, ethylene glycol acrylate, propylene glycol dimethacrylate, diethylene glycol dimethacrylate and mixtures thereof; Substituted amino alcohol-esters of unsaturated acids; Styrene monomers which are styrene, c-methylstyrene and mixtures thereof; Polythiol compounds that are trimetholpropane trithioacrylate, trimetholpropane trithiopropylate, pentaerythritol tetrathioglycol and mixtures thereof; And mixtures thereof.

The monomer can be used in the range of 2-15 parts by weight. When the content of the monomer is less than 2 parts by weight, the workability and the coating film properties are lowered, and when the content of the monomer exceeds 15 parts by weight, a sticking phenomenon occurs, so that the monomer content in the above range is preferable.

The photopolymerization initiator is camphor quinone, s-naphthol, 2,4-diethyl thioxanthone, trimethyl benzoyldiphenylsulpinoxide, dimethylamino ethyl methacrylate, n-butylamine, triethylamine, 4-dimethylaminobenzoic acid Isoamyl, hydrosilanes, sulfonylhydrazide derivatives and mixtures thereof.

The photopolymerization initiator may be used in the range of 1-10 parts by weight. When the content of the photopolymerization initiator is less than 1 part by weight, the curing property is lowered. When the content of the photopolymerization initiator is more than 10 parts by weight, 100% cannot be consumed by ultraviolet irradiation, and the phenomenon that the photopolymerization initiator in the unreacted state migrates to the surface of the coating film. This occurs and becomes uneconomical, which is undesirable.

Examples of the matting particles include organic polymethyl methacrylate, ethyl methacrylate, normal butyl methacrylate, isobutyl methacrylate, acrylamide, metyrol acrylamide, glycidyl methacrylate, and ethyl acryl. Acrylics of latex, normal butyl acrylate and isobutyl acrylate; Olefinic systems of polyethylene, polystyrene, and polypropylene; Silicon-based; Inorganic particle precipitated silica, fumed silica, colloidal silica; And mixtures thereof.

Among the matting particles, the organic particles are monodisperse organic particles having a uniform particle size distribution and particle size, polydisperse organic particles having a uniform particle size distribution and particle size, and a middle powder corresponding to an intermediate region of monodisperse organic particles and polydisperse organic particles. Acid organic particles, polymethyl methacrylate, ethyl methacrylate, normal butyl methacrylate, isobutyl methacrylate, acrylamide, metyrol acrylamide, glycidyl methacrylate, ethyl acrylate, normal Butyl acrylate, isobutyl acrylate, and mixtures thereof, such as acrylic, polyethylene, polystyrene, polypropylene, and mixtures thereof, olefins, and mixtures thereof, and it is preferable to use spherical particles of polymethyl methacrylate. desirable.

The size of the matting particles is preferably 1 ~ 30㎛. When the size of the matting particles is less than 1 μm, the particle size is small and the effect of exposing the particles on the matting coating layer is insignificant, making it difficult to obtain the matting effect, and it is difficult to obtain the surface roughness required by the present invention. When the size of the organic particles exceeds 30 μm, the coated surface is rough, so that the writing feeling is not good, and the wipeability at the time of erasing is also deteriorated.

The matting particles may be used in the range of 10-50 parts by weight. When the matting particles are included in less than 10 parts by weight, the number of matting particles distributed in the matting coating layer is insufficient to obtain a matting effect. When the matting particles are more than 50 parts by weight, no matting effect is obtained, which is uneconomical and the workability is also reduced.

Furthermore, organic solvents used to dissolve and apply the matting coating composition of the present invention include ketones which are methyl ethyl ketone, acetone, methyl butyl ketone, methyl isobutyl ketone and mixtures thereof; Alcohols which are methyl alcohol, ethyl alcohol, isopropyl alcohol and mixtures thereof; Aromatic hydrocarbons which are benzene, toluene, xylene and mixtures thereof; Esters which are ethyl acetate, butyl acetate and mixtures thereof; And mixtures thereof.

The organic solvent can be used in the range of 20-80 parts by weight. If the content of the organic solvent is less than 20 parts by weight, the workability and coating properties are lowered, and if the content of the organic solvent exceeds 80 parts by weight, it is preferable to have the content of the organic solvent.

For blackboard  Film sheet and its manufacturing method

In the present invention, the term "base film" refers to a plastic film commonly used in coatings in the industry. Examples of applicable types include polyethylene terephthalate (PET), polyvinyl chloride (PVC), and modified glycol polyethylene. Terephthalate (PETG), polypropylene, polyethylene, etc. are mentioned.

In another embodiment of the present invention, a method of manufacturing a sheet for film sheet is to form a matte coating layer using the matte coating composition for the chalkboard on one surface of a first fabric. 1 schematically shows a film sheet for a water-colored board having a matte coating layer formed on one surface of a first fabric.

By applying UV-curing paint or thermosetting paint containing matting particles to the first fabric, the surface gloss is reduced by using light diffuse reflection on the surface of the water board. Implement

The type of the first fabric is not limited thereto, and PET, PETG, PVC, polypropylene, polyethylene, and the like may be used. The first fabric is not particularly limited, but may be one having a thickness of 25-300 μm. If the thickness is less than 25㎛, it is easy to cause the appearance of the coated surface and the winding of the fabric due to the crease of the fabric during coating.If the thickness is over 300㎛, the coating is easy, but it is difficult to handle the fabric during post-processing and due to the price increase due to the cost burden. There are problems such as reduced product competitiveness. For example, the first fabric may have a thickness of 100 to 300 μm in the case of a PVC film or a PETG film, and may have a thickness of 25 to 100 μm in the case of a PET film.

The matte coating layer formed on the top layer of the film sheet for the structural structure may be formed by directly applying, drying, and curing the coating composition on the upper surface of the first fabric, and preferably having a thickness of 3-25 μm. When the thickness is formed to less than 3㎛ the surface light diffuse reflection effect is lowered to increase the reflectance of the matting coating layer, thereby causing a decrease in visibility, the surface hardness and durability due to a thin coating film thickness. On the other hand, if the thickness exceeds 25㎛ curling (curling) on the substrate due to the shrinkage of the coated coating film during curing of the matting coating composition is uneconomical to reduce the workability of the product handling and subsequent processes, writing and wiping Degrades.

In addition, the matt coating layer preferably has a surface roughness (Ra) of 3-15㎛. If the surface roughness is formed to be less than 3㎛ excessively slippery surface is not good writing feeling, the matting effect is significantly reduced. On the other hand, when the surface roughness exceeds 15 μm, the surface is rough and the writing feeling is not good, and the wipeability is poor.

When the first fabric is a PVC film, PETG film, or PETG / PVC laminated film, since the adhesion compatibility between the material itself and the matting coating layer is excellent, even if the matting coating composition is directly applied to the first fabric, a good sheet can be obtained. .

However, for example, when the first fabric is a PET film or the like, a primer layer may be included on the upper surface of the first fabric to increase the adhesion between the fabric and the matt coating layer. At this time, the primers are acrylic, urethane, polyester, and the like, and those skilled in the art may appropriately select in consideration of the interaction with the matt coating layer.

The primer layer is formed on the upper surface of the first fabric, the coating thickness is preferably coated with a thin film of 0.1 ~ 0.2㎛. As a primer coating method, a coating technique such as mayer bar, microgravure, reverse gravure, or pressure gravure may be used.

In order to obtain a film sheet printed with a grid pattern, a dividing line, or the like, a separate printing process may be added. FIG. 3 schematically illustrates a film sheet for a paint board in which a printing layer and an adhesive layer are further included in the film sheet for paint board of FIG. 1. In the case of Figure 3, before the matte coating treatment on the upper surface of the fabric, such as PVC film or PETG film, it is possible to manufacture a grid sheet printed film sheet. At this time, the printing process is generally known by a gravure printing method, and the printing ink is preferably a two-component curing binder having solvent resistance.

The film sheet for water board manufactured by the manufacturing method may further include a second fabric. The type of the second fabric is not limited thereto, but a PVC film, PETG / PVC laminated film, or the like may be used. FIG. 2 schematically illustrates a film sheet for a water-colored board in which a first fabric and a second fabric on which a matting coating layer is formed by the manufacturing method are laminated.

The second fabric is a fabric layer utilized to realize the basic color of the water board, and a printing process on the surface and a process such as adding a pigment such as a pigment or a dye to the fabric for coloring is applied. Through the lamination of the second fabric can complement the color of the water board to improve the product color, increase the product thickness of the finished product to facilitate the processing of the product.

The second fabric may be laminated by coating an adhesive on the back of the first fabric on which the matting coating layer is formed, or may be laminated with the second fabric through a thermal lamination or the like, and the lamination method is not particularly limited. As the adhesive used for the lamination, an adhesive such as acrylic, urethane, or epoxy may be used.

In the case of a copyboard product printed with a grid pattern or a dividing line, a separate printing process may be added. FIG. 4 schematically illustrates a film sheet for a blackboard in which a printing layer, a primer layer, an adhesive layer, and the like are further included in the film sheet for a blackboard of FIG. 2. In the case of Figure 4, a specific printing pattern can be formed on the back of the first fabric through a gravure printing process. The pattern printing process at this time is generally by a gravure printing method known, it is preferable to use a two-component curing binder having a solvent resistance for printing ink.

The paint sheet film sheet may further include a pressure-sensitive adhesive layer for attaching the film sheet to the wall or the existing blackboard in addition to the matte coating layer, the first fabric, the second fabric. The release paper is laminated on the pressure-sensitive adhesive layer, and when the film sheet is attached to the wall, the release paper may be attached after separating the release paper. Figure 3 shows that the adhesive coating and the release paper lamination treatment on the back of the first fabric, Figure 4 after the lamination process of the first fabric and the second fabric, the adhesive coating and release paper lamination treatment on the back of the second fabric It is shown. At this time, the pressure-sensitive adhesive may be used an acrylic, rubber, silicone pressure sensitive adhesive.

Hereinafter, the present invention will be described more specifically by way of specific examples. The following examples are provided to aid understanding of the present invention, and the scope of the present invention is not limited thereto.

 Example 1

A matte coating liquid having the following composition was applied to one surface of a polyester film (SKC trade name SH34, film thickness of 50 µm) as the first fabric by using microgravure and dried, and irradiated with ultraviolet rays to cure the matte coating layer having a thickness of 12 µm. Formed. Next, an acrylic adhesive (Samyoung Ink, BPS-4891) was applied to the opposite side of the polyester film to obtain an adhesive layer having a thickness of 13 μm after drying and heat curing, followed by PVC fabric (Fine Industries, SMBP1433). And laminated. After applying the adhesive (Imdeok Chemical, AS-100D) to the back of the second fabric, and dried and cured to obtain a 17㎛ pressure-sensitive adhesive layer, and then laminated with a release paper to prepare a film sheet for a paint plate having a structure as shown in FIG. It was.

1) Composition of matte coating solution

15 parts by weight of urethane acrylate oligomer

8 parts by weight of acrylamide monomer

2 parts by weight of α-naphthol photopolymerization initiator

20 parts by weight of methyl ethyl ketone

20 parts by weight of isopropyl alcohol

Toluene 8 parts by weight

19 weight part of polymethyl methacrylate polydisperse spherical particles (average particle diameter 8 micrometers, the Sekisui Corporation make, brand name MBX-8)

4 parts by weight of dispersant (trade name Disper-656, made by German TEGO)

[Example 2]

Using the matting coating liquid of the composition described below, a film sheet for a water board was prepared under the same conditions and methods as in Example 1.

1) Composition of matte coating solution

14 parts by weight of polyether methacrylate oligomer

9 parts by weight of diethylene glycol dimethacrylate monomer

2 parts by weight of triethylamine photopolymerization initiator

Methyl ethyl ketone 28 parts by weight

20 parts by weight of xylene

19 weight part of polymethyl methacrylate polydisperse spherical particles (average particle diameter 8 micrometers, a brand name MBX-8 made by Sekisui Corporation)

4 parts by weight of dispersant (product made in Germany BYK Chemie, trade name Disperbyk-169)

[Example 3]

Using the matting coating liquid of the composition described below, a film sheet for a water board was prepared under the same conditions and methods as in Example 1.

1) Composition of matte coating solution

16 parts by weight of polyester acrylate oligomer

7 parts by weight of methoxyethyl acrylate

2 parts by weight of triethylamine photopolymerization initiator

Isopropyl Alcohol 30 parts by weight

Benzene 18 parts by weight

19 weight part of polymethyl methacrylate polydisperse spherical particles (average particle diameter 8 micrometers, a brand name MBX-8 made by Sekisui Corporation)

4 parts by weight of a dispersant (by Germany BYK Chemie, trade name Disperbyk-164)

Example 4

Using the matting coating liquid of the composition described below, a film sheet for a water board was prepared under the same conditions and methods as in Example 1.

1) Composition of matte coating solution

15 parts by weight of urethane acrylate oligomer

8 parts by weight of ethylene glycol acrylate monomer

2 parts by weight of trimethylbenzoyl diphenylsulpinoxide photopolymerization initiator

20 parts by weight of methyl ethyl ketone

15 parts by weight of isopropyl alcohol

Xylene 13 parts by weight

22 weight part of polymethyl methacrylate polydisperse spherical particles (average particle diameter 7 micrometers, the Soken company make, brand name MR-7HG)

4 parts by weight of dispersant (Disperbyk-161, manufactured by BYK Chemie, Germany)

[Example 5]

Using the matting coating liquid of the composition described below, a film sheet for a water board was prepared under the same conditions and methods as in Example 1.

1) Composition of matte coating solution

15 parts by weight of urethane acrylate oligomer

8 parts by weight of ethylene glycol acrylate monomer

2 parts by weight of trimethylbenzoyl diphenylsulpinoxide photopolymerization initiator

20 parts by weight of methyl ethyl ketone

15 parts by weight of isopropyl alcohol

Xylene 13 parts by weight

22 parts by weight of polystyrene polydisperse spherical particles (average particle diameter: 5 µm, manufactured by Sekisui, Japan, trade name SX-350H)

4 parts by weight of dispersant (Disperbyk-161, manufactured by BYK Chemie, Germany)

[Example 6]

A matte coating solution of the following composition was applied to one surface of the first fabric PVC film (Fine Industries, SMBP1433) using microgravure and dried, and cured by irradiation with ultraviolet rays to form a matte coating layer having a thickness of 12 μm. The film sheet for the water board of the same structure was manufactured.

1) Composition of matte coating solution

15 parts by weight of urethane acrylate oligomer

8 parts by weight of acrylamide monomer

2 parts by weight of α-naphthol photopolymerization initiator

20 parts by weight of methyl ethyl ketone

20 parts by weight of isopropyl alcohol

Toluene 8 parts by weight

19 weight part of polymethyl methacrylate polydisperse spherical particles (average particle diameter 8 micrometers, the Sekisui Corporation make, brand name MBX-8)

4 parts by weight of dispersant (trade name Disper-656, made by German TEGO)

Comparative Example 1

Using the same conditions and methods as in Example 1 to prepare a film sheet for a water plate as shown in Figure 4 with a matting coating liquid having the composition shown below.

1) Composition of matte coating solution

15 parts by weight of urethane acrylate oligomer

8 parts by weight of acrylamide monomer

2 parts by weight of α-naphthol photopolymerization initiator

20 parts by weight of methyl ethyl ketone

20 parts by weight of isopropyl alcohol

Toluene 8 parts by weight

7 parts by weight of polymethyl methacrylate polydisperse spherical particle (average particle size 8 占 퐉, Japan Sekisui (manufactured by Sekisui Corporation, trade name MBX-8)

4 parts by weight of dispersant (trade name Disper-656, made by German TEGO)

Comparative Example 2

Using the same conditions and methods as in Example 1 to prepare a film sheet for a water board of Figure 4 with a matte coating solution composition as follows.

1) Composition of matte coating solution

3 parts by weight of urethane acrylate oligomer

20 parts by weight of acrylamide monomer

2 parts by weight of α-naphthol photopolymerization initiator

25 parts by weight of methyl ethyl ketone

Isopropyl Alcohol 23 parts by weight

Toluene 8 parts by weight

19 weight part of polymethyl methacrylate polydisperse spherical particles (average particle diameter 8 micrometers, Japan Sekisui (made by Sekisui Corporation, brand name MBX-8))

4 parts by weight of dispersant (trade name Disper-656, made by German TEGO)

The coating film properties of the film sheets for water boards prepared in Examples 1 to 6 and Comparative Examples 1 to 2 were measured and shown in Table 1 below.

division Attachment
(Cross cut) Glossiness
(60 ^o ) pencil
Hardness asperity
(Ra) Exterior Writing Scrub afterimage Example 1 Good 5 3H 9.2㎛ Good 96/100 98/100 95/100 Example 2 Good 5 3H 10.1 ㎛ Good 99/100 97/100 94/100 Example 3 Good 5 3H 8.7㎛ Good 98/100 95/100 92/100 Example 4 Good 5 3H 9.5 ㎛ Good 97/100 98/100 93/100 Example 5 Good 5 3H 6.2 μm Good 97/100 98/100 96/100 Example 6 Good 5 3H 8.9 μm Good 99/100 97/100 95/100 Comparative Example 1 Good 21 2H 2.7 탆 Glare 72/100 87/100 90/100 Comparative Example 2 NG 16 2H 4.3 μm Mura
(stain)
Occur 85/100 82/100 81/100

-Adhesiveness: After cross-cutting the matt coating layer, the adhesiveness between layers was evaluated using a silicone tape, 3M tape, or the like.

Glossiness: 60 ^o of the matte coating layer, measured and evaluated the reflectance (gloss).

-Appearance: Visually discriminate the produced water board film sheet to determine the appearance defect.

-Writing feeling, wipeability, afterimage: Using a commercially available water chalk and an eraser, the sensory evaluation of the writing feeling, the characteristic of erasing, the presence of writing traces after erasing, and the relative figures are recorded.

Examples 1 to 4 show the optical and physical properties of the whiteboard prepared using the matting composition for the whiteboard, each having a different content according to the present invention. Example 5 shows the optical and physical properties of the blackboard prepared using the quenching composition for a water-based blackboard to which styrene matting particles according to the present invention are applied. Example 6 shows the manufacturing method and the optical and physical properties of the water board, which is composed of the first fabric and the matting layer according to the present invention, which has a simplified product structure and manufacturing process.

Comparative Example 1 shows the difference in optical and physical properties when the weight ratio of Example 1 and the matting particles are different, and Comparative Example 2 shows the difference in physical properties when the weight ratio of oligomer and monomer is different from Example 1. .

As Table 1 shows, Comparative Example 1, which has about 2 times less matte particle content than Example 1, has a glossiness of 4 times or more, indicating that the matting effect is remarkably low. In the case of pencil hardness, the comparative example was relatively low in 2H surface strength compared to Example 1 is 3H. In addition, the sensory evaluation on handwriting feeling, wiping property, afterimage, and the like also received a poor evaluation compared to Example 1.

Also in Comparative Example 2 where the content of oligomer, monomer, and matting particles was smaller than that of Example 1, the evaluation was poorer than that of Example 1 in terms of glossiness, pencil hardness, appearance, handwriting, wipeability, and afterimage. This indicates that the greater the ratio of the matting particles to the content of the oligomer and the monomer, the better the matting effect.

As described above, in Examples 1 to 6 according to the present invention, the properties such as glossiness, pencil hardness, appearance, writing feeling, wipeability, and afterimage showed significantly superior values as compared with Comparative Examples 1 to 2. have.

Claims (16)

5-40 parts by weight of oligomer, 2-15 parts by weight of monomer; 1-10 parts by weight of a photopolymerization initiator; And 10-50 parts by weight of matting particles. The method of claim 1, wherein the oligomer is an epoxy acrylate, urethane acrylate, polyester acrylate, silicone acrylate, polyether acrylate, polyol acrylate, melamine acrylate and mixtures thereof; Epoxy resin; Methacrylates which are polyester methacrylate, polyether methacrylate, and mixtures thereof; Unsaturated polyester; Styrene resins; And matte coating composition for water board selected from the group consisting of these. The method of claim 1, wherein the monomer is 2-ethyl methylhexyl acrylate, methoxyethyl acrylate, butyl acrylate and mixtures thereof; Unsaturated carboxylic acid amides that are acryl amide, methacrylamide, and mixtures thereof; Polyfunctional compounds which are dipropylene glycol diacrylate, ethylene glycol acrylate, propylene glycol dimethacrylate, diethylene glycol dimethacrylate and mixtures thereof; Substituted amino alcohol-esters of unsaturated acids; Styrene monomers which are styrene, c-methylstyrene and mixtures thereof; Polythiol compounds that are trimetholpropane trithioacrylate, trimetholpropane trithiopropylate, pentaerythritol tetrathioglycol and mixtures thereof; And matte coating composition for water board selected from the group consisting of these. The photopolymerization initiator according to claim 1, wherein the photopolymerization initiator is camphorquinone, s-naphthol, 2,4-diethyl thioxanthone, trimethyl benzoyldiphenylsulpinoxide, dimethylamino ethyl methacrylate, n-butylamine, triethylamine , 4-dimethylamino benzoic acid isoamyl, hydrosilanes, sulfonylhydrazide derivatives and mixtures thereof. The method of claim 1, wherein the matting particles are polymethyl methacrylate, ethyl methacrylate, normal butyl methacrylate, isobutyl methacrylate, acrylamide, metyrol acrylamide, glycidyl methacrylate, ethyl acryl Acrylate, normal butyl acrylate, isobutyl acrylate and mixtures thereof; Olefins which are polyethylene, polystyrene, polypropylene, and mixtures thereof; Silicon system; Precipitated silica, fumed silica, colloidal silica; And matte coating composition for water board selected from the group consisting of these. The matte coating composition of claim 5, wherein the matte particles have a size of 1-30 μm. The matt coating composition of claim 1, further comprising 20-80 parts by weight of an organic solvent. The method of claim 7, wherein the organic solvent is methyl ethyl ketone, acetone, methyl butyl ketone, methyl isobutyl ketone and mixtures thereof ketones; Alcohols which are methyl alcohol, ethyl alcohol, isopropyl alcohol and mixtures thereof; Aromatic hydrocarbons which are benzene, toluene, xylene and mixtures thereof; Esters which are ethyl acetate, butyl acetate and mixtures thereof; And matte coating composition for water board selected from the group consisting of these. Claims 1 to 8 on one surface of the fabric using a matting coating composition for the water sheet of any one of claims 1 to 8 comprising the step of forming a matte coating layer for a paint sheet. 10. The method of claim 9, wherein the first fabric is coated with a primer. The method according to claim 10, wherein the first fabric is a PET film. 10. The method of claim 9, further comprising the step of laminating a second fabric on the other side of the first fabric. Claims 1 to 8 and a matte coating layer formed of the matte coating composition of any one of claims 1 to 8, wherein the matte coating layer has a surface roughness (Ra) of 3 to 15㎛ film sheet for the blackboard. The film sheet of claim 13, wherein the first fabric has a primer layer. 15. The film sheet of claim 14, wherein the first fabric is a PET film. The film sheet of claim 13, wherein a second fabric is further laminated on a lower surface of the first fabric.

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