KR102117022B1 - The paste composition and method of wallpaper using the same - Google Patents

Abstract

The present invention includes a hydrophilic resin obtained by polymerization of starch and one or more ethylenically unsaturated monomers, and the total water solubility of the ethylenically unsaturated monomers is at least 3.0 g monomer / 100 g water or more, and a wallpaper using the same composition It relates to the construction method.

Description

Construction method of wallpaper and wallpaper using the same {THE PASTE COMPOSITION AND METHOD OF WALLPAPER USING THE SAME}

The present invention relates to a construction method of a daubul grass composition and wallpaper using the same.

The gypsum board is a board for interior decoration of buildings with a mixture of water and miscible materials using flue gas desulfurization gypsum as the main raw material, and coated or molded with a surface as a base material.

When manufacturing the gypsum board, recycled paper is mainly used as the base paper, and the recycled paper is manufactured by using recovered paper, that is, old paper. The paper is a circulating resource that is recycled as a raw material for paper after being circulated in the process of production, distribution, consumption and recovery. In this way, when used as a raw material for papermaking, there is an advantage that waste reduction and resources can be efficiently used. In addition, recycling of old paper is important in that it can protect forest resources by suppressing the use of new pulp to make paper.

By the way, in order to increase the utilization of the highland, unsuitable foreign substances must be thoroughly removed in order to reproduce it with paper, but in reality, various sources (general households, paper processing factories, printing and binding factories, publishers, newspapers, small and large shopping malls, etc.) ) It is very difficult to perfectly discern the amount of highland discharged. Therefore, in the case of paper / cardboard products, such as gypsum boards manufactured using paper, there is a problem in that physical properties or appearance quality are deteriorated by various foreign substances contained in the paper.

As an example, the gypsum board using the high paper contains a strong dyeing component derived from the high paper, so that when the silk wallpaper is installed on the gypsum board, there is a problem that colored spots caused by the dye component occur on the surface of the silk wallpaper. have. In order to fundamentally solve this problem, when manufacturing gypsum board, paper made of new pulp, rather than paper, should be used, but it is not preferable from the environmental or economical aspects.

Therefore, there is a need for a method capable of preventing the migration phenomenon due to a dye component even when a wallpaper is installed on a gypsum board made of high paper.

KR 2010-0062898 A

The present invention is to provide a doucheul composition excellent in the migration effect.

The present invention is to provide a construction method of a wallpaper using the above composition.

The present invention relates to a doucheful composition comprising a hydrophilic resin obtained by polymerization of starch and one or more ethylenically unsaturated monomers, wherein the total water solubility of the ethylenically unsaturated monomers is at least 3.0 g monomer / 100 g water or more. .

In addition, the present invention provides a wallpaper construction method, which comprises applying the dopa pool composition to one surface of the wallpaper, and attaching the wallpaper coated with the dopa pool composition to a wall surface.

The composition of the pear paste of the present invention is not only excellent in improving the adhesive strength, but also has an excellent anti-migration effect, and when constructing a wallpaper using this, it is possible to significantly reduce the migration phenomenon from the base of the gypsum board surface. Therefore, using the composition of the present invention, there is an effect that can improve the appearance quality of the wallpaper installed on the gypsum board.

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

The present invention provides a daubul grass composition.

The above composition of the present invention comprises starch and a hydrophilic resin.

The starch may be at least one selected from corn starch, corn starch, amioka starch, tapioca starch, potato starch, sweet potato starch, sago starch, root (Arrow root) starch, wheat starch, rice starch, and the like.

In addition, the starch can be used through a process to hydrolyze through an acid catalyst or a decomposition enzyme to have a viscosity that dissolves in an appropriate concentration in water. For example, in the case of wheat flour containing wheat starch, the wheat starch is hydrolyzed in hot water with a strong acid such as sulfuric acid. After that, by adding a preservative to prevent contamination by microorganisms such as bacteria and fungi in the liquid state and the dry film state, and then diluting by adding water, the viscosity when measured at room temperature with a Brookfield viscometer is tens of thousands cPs. It can be used as a coating paste by adjusting it to (at room temperature). On the other hand, the powdered pear paste is prepared by adjusting the molecular weight and functional group of the starch in order to improve water solubility, and can be used by dissolving it in water to obtain an appropriate viscosity.

The starch is a natural material and does not emit volatile organic compounds harmful to the human body, and may contain a large amount of water at a relatively low weight. When the starch is used as a paste, it can be stored for several days by sealing it with a barrier material even after being applied to the wallpaper. However, when starch is used alone as a cultivation glue, the coating film to be adhered is partially unsuccessful because the polymer contained in the starch forms a crystalline region such as an amylopectin structure through strong hydrogen bonding between some starch molecules. A part may be formed, which may cause a migration phenomenon.

Therefore, in the present invention, in order to overcome the above-mentioned low migration preventing performance of starch, a hydrophilic resin capable of forming a relatively dense coating film while having excellent compatibility with starch is used.

The hydrophilic resin may be a polymer or copolymer in which one or more monomers selected from ethylenically unsaturated monomers are polymerized.

The ethylenically unsaturated monomers may be vinyl esters, acrylic acid esters, methacrylic acid esters, vinyl aromatic monomers, conjugated diene monomers, vinyl chloride monomers, nitrile monomers, amide monomers and acid monomers. For example, vinyl acetate, vinyl propionate, vinyl butylate, vinyl versatate, vinyl neodecanoate, methyl methacrylate, ethyl methacrylate, propyl methacrylate, butyl methacrylate, benzyl methacrylate, Methyl acrylate, ethyl acrylate, propyl acrylate, butyl acrylate, 2-ethylhexyl acrylate, 2-hydroxyethyl methacrylate, 2-hydroxyethyl acrylate, styrene, vinyltoluene, methylstyrene, ethylene, Butadiene, vinyl chloride, vinylidene chloride, acrylonitrile, acrylamide, methacrylic amide, acrylic acid, methacrylic acid, crotonic acid, itaconic acid, fumaric acid, maleic acid, monoalkylmaleate, monoalkylfumarate, monoalkylitaco Nate, vinylbenzoic acid, and the like.

In addition, the polymer in which one or more ethylenically unsaturated monomers are polymerized may be dissolved in water or polymerized in a uniformly dispersed polymer emulsion state.

Meanwhile, the ethylenically unsaturated monomer may have a total water solubility of at least 3.0 g monomer / 100 g water or more.

The water solubility is a water solubility for 100 g of water or 100 ml of water, such as Peter A. Lovell and Mohamed S. El-Aasser's book "Emulsion Polymerization and Emulsion Polymers, 1997, Wiley" and Wikipedia. The water solubility for each monomer can be seen through the data. Although the water solubility of the main monomer is shown in Table 1 below, the monomer of the present invention is not limited to the monomer of Table 1 below.

Monomer name Abbreviation Water solubility
(Weight of monomer per 100 g of water (g)) source Styrene ST 0.032 (One) Methyl methacrylate MMA 1.59 (One) n-butyl methacrylate BMA 0.08 (2) Vinyl acetate VAc 2.3 (One) Methyl acrylate MA 5 (3) Ethyl acrylate EA 1.51 (One) n-butyl acrylate BA 0.2 (One) 2-ethylhexyl acrylate 2-EHA 0.01 (One) Vinyl neodecanoate VV10 <0.1 (4) Acrylic acid AA ∽ (3) Methacrylic acid MAA 9.9 (3) 2-hydroxyethyl methacrylate 2-HEMA ∽ (2) 2-hydroxyethyl acrylate 2-HEA ∽ (2) Acrylonitrile AN 7.9 (One) Acrylamide AAm 204 (3) 1,3-butadiene BD 0.073 (3) source
(1) By Peter A. Lovell and Mohamed S. El-Aasser, "Emulsion Polymerization and Emulsion Polymers, 1997, Wiley"
(2) ILO-ICSC (International Chemical Safety Cards)
(3) Wikipedia (https://en.wikipedia.org)
(4) Hexion Veova ^TM 10 monomer Technical Data Sheet (2016)

The total water solubility of the ethylenically unsaturated monomer can be calculated as the sum of the product of the weight fraction of each monomer multiplied by the water solubility. However, additives such as initiators, protective colloids, and emulsifiers used in a small amount during polymerization of commonly used hydrophilic resins are excluded from the above water solubility calculation. In addition, highly hydrophilic monomers capable of infinitely diluting in water at 25 ° C. or having a water solubility of 100 g or more, for example, acrylic acid (AA), 2-hydroxyethyl methacrylate. Monomers such as 2-hydroxyethyl acrylate and acrylamide (AAm) can be calculated as follows, considering the water solubility as 100 g monomer / 100 g water.

For example, when the hydrophilic resin is a synthetic resin emulsion obtained by polymerizing with a weight fraction of 40/30/30 each of methyl methacrylate (MMA) / n-butyl acrylate (BA) / methacrylic acid (MAA), the monomers thereof Their total water solubility is (1.59 g MMA / 100 g water × 0.4) + (0.2 g BA / 100 g water × 0.3) + (9.9 g MAA / 100 g water × 0.3) = 3.7 g monomer / 100 g water Water solubility suitable for may fall within the range.

On the other hand, for example, when the hydrophilic resin is a copolymer emulsion obtained by polymerization in a weight fraction of styrene (ST) / MMA / 2-ethylhexyl acrylate (2-EHA) / MAA 50/10/45/5, respectively, The total water solubility of its copolymerized monomers is (0.032 g ST / 100 g water Х 0.5) + (1.59 g MMA / 100 g water Х 0.1) + (0.01 g 2-EHA / 100 g water Х 0.45) + (9.9 g MAA / 100 g water Х 0.05) = 0.7 g monomer / 100 g water may be outside the range of water solubility suitable for the present invention.

The weight ratio of the starch and the hydrophilic resin based on the solid content of the dopaegrass composition may be included in an amount of 80 to 30: 20 to 70, for example, 70 to 40: 30 to 60. When the weight ratio of the starch and the hydrophilic resin based on the solid content of the dopae grass composition is outside the above range, for example, when the content of starch exceeds 80 parts by weight based on the solid content of the dopae grass composition, the effect of preventing migration is remarkably Can decrease. In addition, when the content of the starch is less than 20 parts by weight based on the solid content of the dope paste composition, drying of the dope paste composition is faster, resulting in poor storage during wall maturation after welding, thereby significantly reducing workability during wallpaper construction. Problems may occur.

The composition of the present invention may further include additives such as thickeners, preservatives, and fillers.

The thickener may be used without limitation as long as it can control the flowability of the dopa grass composition. Examples of the thickener may be water-soluble cellulose-based thickener, alkali-swellable acrylic resin emulsion, aqueous urethane thickener (Hydrophobically modified ethylene oxide urethane), aqueous inorganic clay-based thickener, and aqueous amide wax.

The preservative is to prevent decay by the microorganisms in the wet state before application of the pear paste composition, and to prevent the occurrence of mold in the dry state after construction, if used in water-based paints, adhesives, food, cosmetics, etc. Can be. Examples of the preservatives may be isocyazoline derivatives, dimethyldiciocarbamate, sorbic acid and its salts, benzoic acid and its salts, sodium nitrite, parabens, phenoxyethanol, phenols and copper compounds.

In addition, the filler may be used without limitation as long as it allows the paint surface to be identified, improves economical efficiency, or performs a function capable of assisting the migration prevention performance. Pigments, color pigments and functional fillers can be used.

The dopaegrae composition may be adjusted so that the viscosity measured at 25 ℃ with a Brookfield (Brookfield) viscometer is 100 to 300,000cPs. When the viscosity is less than 100 cPs, the anti-migration effect may be insignificant, and when it exceeds 300,000 cPs, brush marks or roller marks, etc., may remain on the coating surface, resulting in poor appearance. On the other hand, the dopeul paste composition may be applied to the wallpaper one or more times using a brush, roller, or an automatic dope paste applicator. In particular, when using the dope paste applicator, the viscosity of the dope paste composition is tens of thousands of cPs. Can. When the viscosity of the dope paste composition is tens of thousands of cPs when using the automatic dope paste applicator, uniform coating is achieved, and good paste fixation on the wallpaper surface and very good adhesion when applied to the wall surface can be obtained. In addition, the doubling composition is very easy to wash with water even after leaving for several days after using the automatic doubling agent.

Such a composition of the present invention can be mixed with other adhesives such as starch composition, synthetic resin adhesives or primers, which are commonly used in consideration of cost reduction, workability and adhesion improvement. At this time, the composition of the present invention and other adhesives may be mixed in a weight ratio of 30 to 100: 0 to 70 based on each solid content. When the mixing ratio of the other adhesive is included in excess of 70 weight ratio, the effect of preventing migration can be reduced exerted by the composition of the present invention.

2. Wallpaper construction method

The present invention provides a construction method of a wallpaper using the above composition.

The construction method of the wallpaper includes applying the composition of the doubling pool to one surface of the wallpaper and attaching the wallpaper of the doubling pool to the wall surface.

The composition of the doubling pool may be applied to a surface of the wallpaper using a method such as spraying, brush painting, roller painting, knife coating or roll coating using an automated facility or manpower, and may be applied one or more times to the wallpaper. have. The wallpaper may be, for example, a silk wallpaper, and another example may be a polyvinyl chloride (PVC) -based silk wallpaper.

On the other hand, before attaching the wallpaper coated with the dopeul paste composition to the wall surface, the wallpaper coated with the dope paste composition is sealed with a barrier material such as a plastic bag or an aluminum bag to prevent drying of the wet dope paste for 20 minutes to 7 minutes. You can go through the process of aging for days. In this case, it is possible to obtain a smooth-looking surface without wrinkles after construction.

In the present invention, in order to attach the wallpaper to the wall surface, the wallpaper is cut. At this time, the coating composition may be coated on the wallpaper and then cut and attached to the wall, or the coated wallpaper may be coated on the wall and then applied to the wall surface. have.

The wall surface may be a gypsum board, which is a plate for interior decoration of a building, which is coated or molded with high paper.

When the wallpaper is constructed on recycled paper such as gypsum board base paper using the above-described composition of the present invention, the problem of expression of colored spots on the surface of the wallpaper due to the dye component contained in the gypsum board base on which the recycled paper is used is significantly improved. This can further improve the appearance quality of the wallpaper.

Hereinafter, examples will be described in detail to specifically describe the present invention. However, the embodiments according to the present invention can be modified in many different forms, and the scope of the present invention should not be construed as being limited to the embodiments described below.

Example 1

<Preparation of hydrophilic acrylic synthetic resin emulsion>

400 g of deionized water, 0.5 g of sodium dodecylbenzenesulfonate, 0.5 g of sodium bicarbonate, and 0.5 g of sodium bicarbonate were added to a 3L, 4-necked flask equipped with a thermostat, thermocouple, condenser, stirrer, and drip bath with automatic temperature control. It heated up to 80 degreeC while putting. Then, an aqueous solution in which 0.5 g of ammonium persulfate was dissolved in 16 g of deionized water was added to the flask. A seed mixture was prepared by dropping a monomer mixture consisting of 10.5 g of acrylonitrile, 11.4 g of methylmethacrylate and 0.5 g of methacrylic acid for 30 minutes while maintaining a reaction temperature of 80 ° C. Subsequently, a solution in which 1.4 g of sodium persulfate was dissolved in 30 g of deionized water was added to the flask, while maintaining the reaction temperature at 80 ° C, 130 g of deionized water, 1.5 g of sodium dodecylbenzenesulfonate, 84 g of butyl acrylate, 80 g of methyl methacrylate, 65 g of methacrylic acid, and 2 g of dodecyl mercaptan were added to prepare a pre-emulsion. The pre-emulsifier was slowly added into the reactor over 120 minutes, held for 30 minutes, and then cooled to room temperature. The calculated total water solubility of the monomers used in the polymerization of the hydrophilic acrylic synthetic resin emulsion corresponded to 3.6 g monomer / 100 g water.

<Preparation of pear paste composition>

In order to prepare the composition of the composition containing the acrylic synthetic resin emulsion prepared above, the process of mixing with the starch paste was performed as follows.

First, a commercially available starch paste (Samsung Industrial Products, solid content 20%) was prepared, samples were collected and left in an oven at 150 ° C. for 30 minutes, and solid content was measured through weight measurement to confirm that it was 19.5%.

Meanwhile, 1,150 g of deionized water was mixed with 1,000 g of the synthesized acrylic synthetic resin emulsion (solid content 45%). Again, a sample was taken for solid content measurement, and after standing for 30 minutes in a 150 ° C. oven, the weight was confirmed, and the solid content was 20.9%. The starch paste and the hydrophilic acrylic synthetic resin emulsion were mixed at a weight ratio of 7: 3 based on the solid content previously measured to finally prepare a dopa grass composition.

Example 2

<Production of vinyl acetate-based synthetic resin emulsion>

In an auto-adjustable heating mantle, thermocouple, condenser, stirrer and dropping tank, a 360L deionized water and sodium acetate 1.2g, solid content 20%, nonionic emulsifier (NS 230) 34g, solid content 10% 440 g of polyvinyl alcohol (217E) was added and heated to 65 ° C. while blowing nitrogen. Then, 90 g of vinyl acetate was added dropwise to the flask for 10 minutes to emulsify. A solution in which 1.6 g of sodium tartrate was dissolved in 20 g of deionized water was added dropwise to the flask, and then a polymerization reaction was started while also dropping a solution of 4 g of ammonium persulfate dissolved in 20 g of deionized water. After the temperature of the flask was raised to 70 ° C., a monomer mixture consisting of 710 g of vinyl acetate, 200 g of vinyl versatate (Beoba 10) and 280 g of methacrylic acid was added dropwise for 180 minutes while maintaining the reaction temperature. After the dropping was completed, the reaction was carried out at 75 ° C for 60 minutes, and then the temperature was dropped to terminate the polymerization reaction. The calculated total water solubility of the monomers used in the polymerization of the commercialized vinyl acetate-based synthetic resin emulsion was 3.6 g monomer / 100 g water.

<Preparation of pear paste composition>

In order to prepare the composition of the vinegar paste containing the vinyl acetate-based synthetic resin emulsion, a process of mixing with the starch paste was performed. However, the solid content of the starch paste was the same as in Example 1 mentioned above.

After mixing 1,570 g of deionized water with 585 g of the synthesized vinyl acetate-based synthetic resin emulsion (77% solid content), samples were collected, left in an oven at 150 ° C. for 30 minutes, and weighed to measure solid content. The value was 20.9%. The starch paste and the vinylacetate-based synthetic resin emulsion were mixed at a weight ratio of 7: 3 based on the solid content measured above, thereby preparing a doppler pool composition.

Example 3

<Manufacture of styrene-based synthetic resin emulsion>

161.6 g of deionized water, 9.43 g of styrene and 5.39 g of methacrylic acid were added to a 1L, 4-necked flask equipped with a heating mantle, thermocouple, condenser, stirrer and dropping tank capable of automatic temperature control, and the temperature was maintained at 80 ° C. Then, in order to perform the primary polymerization, an aqueous solution in which 0.97 g of ammonium persulfate was dissolved was added to 10.77 g of distilled water. Thereafter, 63.08 g of methacrylic acid, 75 g of styrene, 33.29 g of 2-ethylhexyl acrylate, and 0.97 g of ammonium persulfate were dissolved in 107.73 g of deionized water and added dropwise to the flask maintained at 80 ° C. for 3 hours each. After the dropping was completed, after aging for 1 hour, a solution in which 0.11 g of ammonium persulfate was dissolved in 1.62 g of deionized water and a solution in which 0.11 g of sodium metabisulfate was dissolved in 1.62 g of deionized water were added to the flask for reaction. Ordered. After all the reactions were completed, the temperature of the flask was dropped to complete the polymerization reaction of the styrene-based synthetic resin emulsion. The calculated total water solubility of the monomers used in the polymerization of the styrene-based synthetic resin emulsion was 3.6 g monomer / 100 g water.

<Preparation of pear paste composition>

In order to prepare the composition of the doubling pool containing the prepared styrene-based synthetic resin emulsion, a process of mixing with the starch pool was performed. However, the solid content of the starch paste was the same as in Example 1 mentioned above.

After mixing 910 g of deionized water with 1000 g of the synthesized styrene-based synthetic resin emulsion (40% of solid content), a sample was collected, left in an oven at 150 ° C. for 30 minutes, and weighed to measure solid content. Was 20.9%. Based on the solid content measured above, the starch paste and the styrene-based synthetic resin emulsion were mixed at a weight ratio of 7: 3 to prepare a dopa grass composition.

Example 4

<Production of core shell type acrylic synthetic resin emulsion>

261.3 g of deionized water and 0.4 g of sodium dodecylbenzenesulfonate were added to a 2L, 4-neck flask equipped with a thermostat, thermocouple, condenser, stirrer, and dropping tank capable of automatic temperature control. After blowing nitrogen into the flask and heating to 80 ° C., an aqueous solution in which 0.1 g of ammonium persulfate was dissolved in 11 g of deionized water was added. A monomer mixture consisting of 10.0 g of n-butylacrylate, 4.4 g of methyl methacrylate, and 0.2 g of methacrylic acid was added dropwise to the flask for 30 minutes while maintaining the reaction temperature at 80 ° C., and the same reaction temperature was maintained for 30 minutes. To maintain the seed polymer. Thereafter, an aqueous solution in which 0.3 g of sodium persulfate was dissolved in 14.5 g of deionized water was added to the flask containing the seed polymer and maintained at a reaction temperature of 80 ° C. for 10 minutes. Subsequently, the monomer composition for forming a core portion consisting of 42.9 g of deionized water, 0.6 g of sodium dodecylbenzenesulfonate, 29.2 g of methacrylic acid, 18.6 g of n-butylacrylate, and 9.6 g of methyl methacrylate was formed for 90 minutes. While maintaining at 80 ℃ while uniformly added. After completion of the addition, it was further maintained at 80 ° C for 60 minutes. Thereafter, an aqueous solution in which 0.6 g of sodium persulfate was dissolved in 33.8 g of deionized water was added to the flask and maintained at 80 ° C for 10 minutes. Subsequently, a monomer composition for forming a shell portion consisting of 101.2 g of deionized water, 2.0 g of sodium dodecylbenzenesulfonate, 38.5 g of methacrylic acid, 67.5 g of n-butylacrylate, and 38.0 g of methyl methacrylate was prepared. It was added uniformly at 90 ° C for 90 minutes. After the completion of the input, the mixture was maintained at 80 ° C for 60 minutes, then heated to 87 ° C and maintained at the temperature for 60 minutes, and then cooled to room temperature to complete polymerization of the hydrophilic emulsion resin. The calculated total water solubility of the monomers used in the core shell acrylic synthetic resin emulsion polymerization was 3.6 g monomer / 100 g water.

<Preparation of pear paste composition>

In order to prepare the composition of the pear paste containing the prepared core-shell acrylic synthetic resin emulsion, a process of mixing with starch paste was performed. However, the solid content of the starch paste was the same as in Example 1 mentioned above.

1,150 g of deionized water was mixed with 1,000 g of the synthesized core shell emulsion resin (45% of solid content), and a sample was collected at 150 ° C? It was 19.9% as a result of measuring the solid content after weighing for 30 minutes in the oven. The starch paste and the core shell acrylic synthetic resin emulsion resin were mixed in a weight ratio of 7: 3 based on the solid content to prepare a dopa pool composition.

Comparative Example 1

<Hydrophobic Vinyl Acetate Synthetic Resin Emulsion and Doppler Composition>

A vinyl acetate-based synthetic resin emulsion was prepared in the same manner as in Example 2, except that the monomer mixture was composed of 210 g of vinyl acetate, 800 g of vinyl versatate (Beoba 10), and 180 g of methacrylic acid. A douche composition was obtained. The calculated total water solubility of the monomers used in the hydrophobic styrene-based synthetic resin emulsion polymerization was 2.0 g monomer / 100 g water.

Comparative Example 2

<Hydrophobic Styrene Synthetic Resin Emulsion and Doppler>

After the first polymerization, the same procedure as in Example 3 was carried out, except that an amount of 8.08 g of methacrylic acid and 75 g of styrene was used in 107.73 g of deionized water in which 0.97 g of ammonium persulfate was dissolved, and the vinylacetate-based synthetic resin was used. Emulsion and doppler compositions were obtained. The calculated total water solubility of the monomers used in the polymerization of the hydrophobic styrene-based synthetic resin emulsion was 0.8 g monomer / 100 g water.

Comparative Example 3

<Starch paste for application without synthetic resin>

Commercially available starch paste (Samsung Industrial Products, 20% solids) was prepared. The sample of the starch paste was collected and left in an oven at 150 ° C. for 30 minutes, and then weighed to measure solid content. As a result, the solid content was 19.5%. For comparative experiments, 70% by weight of the starch paste for doubling and 30% by weight of water were uniformly mixed to prepare a doubling composition, and then samples were taken and left in an oven at 150 ° C for 30 minutes, and weighed to make solid content. As a result, solid content was 13.5%.

Comparative Example 4

<Primer for hydrophobic coating>

Commercially available aqueous primers for doubling (Ogongbond Co., Ltd., 501 primers, synthetic resin emulsion with solid content of 20% (monomer analysis result, weight ratio corresponds to styrene / 2-ethylhexylacrylate / n-butylacrylate = 46/53/1) Hydroxyethylcellulose (Natrasol 330+) was added in a small amount to prepare a doppler composition having a viscosity of 100,000 ± 50,000 cPs at 25 ° C. Samples of the doppler composition were sampled in an oven at 150 ° C. 30 After standing for a minute and weighing, solid content was measured, and the solid content was 20.2%.

The calculated total water solubility of the monomers used in the commercialized hydrophobic polymerization primer polymerization was 0.02 g monomer / 100 g water.

Comparative Example 5

<Styrene-butadiene rubber (SBR) latex for paper>

135 g of deionized water is mixed with 100 g of commercially available paper-based binder styrene-butadiene rubber (SBR) latex (Hansol Chemical, S-203, main component styrene / butadiene = 45/55, solid content 47% by weight) The composition was prepared. A sample of the composition for doubling was collected, left in an oven at 150 ° C. for 30 minutes, and weighed to measure solid content. As a result, the solid content was 20.2%.

The calculated total water solubility of the monomers used in the commercialized primer polymerization for hydrophobic doping was 0.05 g monomer / 100 g water.

Experimental Example 1: Evaluation of the effect of preventing otitis

Sprayed acetone on the gypsum board base paper (for general gypsum board, manufactured by Ace Paper Co., Ltd.) with a spray, and all red and blue spots that appeared after a while were cut off. Twenty spots cut out from 20cmХ20cm plasterboard paper were glued evenly. Each dopa grass composition prepared in Examples and Comparative Examples was applied evenly to a commercially available silk wallpaper (Shinhan Wallpaper Co., Ltd., Living Sandwick) once with a brush and attached to the surface of the gypsum board base with spots attached. After that, it was left at room temperature for 1 month, and the phenomenon of colored spots on the surface of the silk wallpaper was visually observed. Of 20 total spots, the number of spots generated on the silk wallpaper and the expression intensity were evaluated to prevent the migration of the daubul grass composition, and the results are shown in Table 2 below.

division Number of colored spots on the wallpaper after 1 month (number) (expression intensity) Example 1 0/20 (about) Example 2 3/20 (about) Example 3 2/20 (about) Example 4 2/20 (about) Comparative Example 1 5/20 (medium) Comparative Example 2 8/20 (strong) Comparative Example 3 20/20 (strong) Comparative Example 4 15/20 (strong) Comparative Example 5 14/20 (medium)

As can be seen from Table 2, in the case of Examples 1 to 4, the total water solubility of which is 3.0 g monomer / 100 g water-repellent composition having at least water, the number of colored spots expressed on the silk wallpaper after 1 month is 0 to On the other hand, in Comparative Examples 1 and 2, which are the composition of the doppler composition containing a hydrophobic resin, the number of 5 or 8 colored spots was observed, respectively, and Comparative Examples 4 and 5 in which the water solubility value of the monomer was 0.02 or 0.05 monomer / 100 g water. 14 or 15 colored spots were observed. In addition, in the case of Comparative Example 3, which is a composition of a composition of a starch paste containing only starch paste, 20 colored spots were observed.

Experimental Example 2: Evaluation of adhesive strength

The adhesive strength of the dope paste composition prepared in Examples and Comparative Examples was evaluated according to the adhesive strength specification of KS F 3217 (revised version 2010). If it exceeds the standard value of 8.0 N / 25 mm, it is evaluated as 'good', and if not, it is evaluated as 'bad', and the results are shown in Table 3 below.

division Adhesion strength Example 1 Good Example 2 Good Example 3 Good Example 4 Good Comparative Example 1 Good Comparative Example 2 Good Comparative Example 3 Good Comparative Example 4 Good Comparative Example 5 Good

As can be seen from Table 3, in Examples 1 to 4 and Comparative Examples 1 to 5, the adhesive strength was good.

Experimental Example 3: Evaluation of drying stability and adhesion

The composition of dopa grass prepared in Examples and Comparative Examples was uniformly applied with a brush of 4 g each to a silk wallpaper (Shinhan Wallpaper Co., Ltd., Living Sandwick) having a width / length of 10 cm. Thereafter, the coated surface coated with the daubul grass composition was folded in half, sealed in a plastic bag, and aged for 5 days (120 hours). After completion of the aging, whether or not the dopeum composition was agglomerated and dried on the coated surface coated with the dopeum composition was visually observed.

In addition, by attaching the aged silk wallpaper to the gypsum board, the adhesiveness after aging the composition of the vinegar composition was evaluated. It was evaluated as 'good' when the dope paste composition remains uniformly in the form of sol on the diagram surface of the dope paste composition, as 'clump' when the dope paste composition is agglomerated, and as 'dry' when the dope paste composition is dried. In addition, it was evaluated as 'good' when the adhesion of the silk wallpaper to the gypsum board was good, and 'bad' when it was poor.

division Drying Stability of Dopegrass Composition After Aging Adhesion of the vinegar composition after aging Example 1 Good Good Example 2 Good Good Example 3 Good Good Example 4 Good Good Comparative Example 1 Bunch Bad Comparative Example 2 dry Bad Comparative Example 3 Good Good Comparative Example 4 dry Bad Comparative Example 5 Bunch Bad

As can be seen from Table 4, in the case of Examples 1 to 4, which are hydrophilic resins and have a total water solubility of 3.0 g monomer / 100 g water or more, the drying stability and adhesiveness are both good, Comparative Examples 1 and 2 containing a hydrophobic resin exhibited dryness or dryness, and poor adhesion. In addition, even in Comparative Examples 4 and 5 in which the water solubility value of the monomer was 0.02 or 0.05 monomer / 100 g water, drying or agglomeration showed dry stability, and adhesion was also poor.

Through the above results, when the total water solubility of the monomers is less than 3.0 g monomer / 100 g water, as in Comparative Examples 1 and 2 or Comparative Examples 4 and 5 containing a hydrophobic resin, the drying rate of moisture becomes relatively fast and drying stability after aging. And poor adhesion.

Experimental Example 4: Water washability when using an automatic spreader

Examples and comparative examples prepared in the dopeul paste composition was uniformly applied to the applicator roller using an automatic dope paste applicator. After the application was completed, the applicator was sealed with a plastic bag and stored for 2 days. Subsequently, the water washability of the daubble composition remaining in the applicator was evaluated. After washing with water, it was evaluated as 'good' if there was no residual amount of dopant on the roller, and 'bad' if there was a residual amount, and the results are shown in Table 5 below.

division Automatic wash coating machine water washability Example 1 Good Example 2 Good Example 3 Good Example 4 Good Comparative Example 1 Good Comparative Example 2 Bad Comparative Example 3 Good Comparative Example 4 Bad Comparative Example 5 Bad

As can be seen from Table 5, the water washability of Examples 1 to 4 in which the total water solubility of the monomers was 3.0 g monomer / 100 g water or more was all good. On the other hand, in the case of Comparative Examples 4 and 5 in which the total water solubility of the monomers did not satisfy more than 3.0 g monomer / 100 g water, the water washability was poor.

Claims (5)

And a hydrophilic resin obtained by polymerization of starch and one or more ethylenically unsaturated monomers,
The total water solubility at 25 ° C of the ethylenically unsaturated monomer is at least 3.0 g monomer / 100 g water or more,
A weight ratio composition based on the solid content of the starch and the hydrophilic resin is 80: 20 to 70:30,
The ethylenically unsaturated monomer is at least one selected from vinyl esters, acrylic acid esters, methacrylic acid esters, vinyl aromatic monomers, conjugated diene monomers, vinyl chloride monomers, nitrile monomers, amide monomers and acid monomers. Including,
The dopa pool composition is a dopa pool composition having a viscosity of 100 to 300,000 cPs measured at 25 ° C with a Brookfield viscometer.
The method according to claim 1,
The hydrophilic resin is a douche pool composition formed by polymerization of an ethylenically unsaturated monomer.
delete Applying the composition of claim 1 or claim 2 on one side of the wallpaper; And
A wallpaper construction method comprising; attaching the wallpaper coated with the doubling composition to a wall surface.
The method according to claim 4,
The wallpaper construction method further comprising the step of aging the wallpaper coated with the dope paste composition for 20 minutes to 7 days before attaching the dope paste coated wallpaper to the wall surface.