KR20110001743A - Adhesive for overlapping wallpaper with improving water resistance - Google Patents

Abstract

PURPOSE: An aqueous adhesive for overlapping wallpaper is provided to ensure excellent adhesive force as well as fluidity and water resistance and to avoid discharge of volatile organic compounds and formaldehyde. CONSTITUTION: A method for manufacturing an aqueous adhesive for overlapping wallpaper comprises the steps of: preparing a polyvinylacetate polymerization emulsion; preparing an acrylate copolymerization emulsion; and mixing 60-80 weight% polyvinylacetate polymerization emulsion and 20-40 weight% acrylate copolymerization emulsion. The polyvinylacetate polymerization emulsion is obtained by polymerizing water, polyvinyl alcohol, vinyl acetate, butyl acrylate monomer, non-ionic emulsifier, anionic emulsifier and catalyst.

Description

Adhesive for overlapping wallpaper with improving water resistance}

The present invention relates to an aqueous adhesive for laminated wallpaper and a manufacturing method thereof, and more particularly, to an aqueous adhesive for laminated wallpaper and a method for producing the same.

Wallpaper is a building finishing material used to improve the living environment by changing the interior wall or ceiling of a building, or to change the feeling or atmosphere of a building according to the taste of consumers.

In the past, the wallpaper has been used only for the purpose of decorating the wall, but in recent years it has been added to other functions in addition to the basic purpose of the decoration, especially the wallpaper has been developed to help health from harmful indoor environment.

Such wallpaper is an indoor building material and has an effect of producing an indoor atmosphere differently without a large construction. Generally, the wallpaper is divided into paper wallpaper, silk wallpaper, and special wallpaper, and paper wallpaper can be divided into laminated wallpaper and complex wallpaper.

Silk wallpaper is backed by outer and inner inlays, and inlay is paper that can be glued on. The outer surface is a thin vinyl film made of 100% PVC, which can produce a variety of patterns and colors compared to paper. There is an advantage that can be erased well. Therefore, it is mainly applied to common living spaces such as living rooms and commercial spaces. The disadvantage of the silk wallpaper is that it is expensive compared to the laminated wallpaper and can cause atopy as a harmful substance due to the PVC component, and in the event of fire, it may increase the damage by generating toxic gas. In particular, because the air does not pass through, it is easy to catch a cold, and if the humid day persists, the wallpaper may sag.

Special wallpaper is a wallpaper used for the purpose of creating a unique atmosphere in a special space and has a distinctive feature in terms of manufacturing method and atmosphere from paper wallpaper or silk wallpaper. Fluorescent wallpaper, for example, is a special wallpaper commonly used in commercial spaces (karaoke, pubs, etc.). It is expressed only in chromatic colors in general lighting. Pictures are produced. Hanji wall paper is a wallpaper based on traditional Korean paper according to the natural interior trend, and overcomes the strength problem of the existing paper and the monotony of color and design. In addition, there are solid wood wallpaper using wood material, cork wallpaper using mashed or cut wood, and fiber wallpaper made of general fiber.

Laminated wallpaper is designed to enhance the aesthetic effect and durability, and the wallpaper is made by printing and embossing the laminated paper using water-soluble adhesive on the upper and lower limbs. Such laminated wallpaper is widely used due to the low construction cost, and nowadays, environmentally friendly fabric wallpaper is becoming a trend as a luxury interior material.

However, due to the poor adhesion of the laminated wallpaper after the construction of the laminated wall map, the surface of the wallpaper provides a space for the growth of microorganisms such as mold due to the moisture on the wall, which can cause respiratory diseases to the elderly and the children. Degrades.

The adhesive for paper, which is essential for the paper wall paper, has a problem of releasing large amounts of environmental hormones such as various volatile organic compounds and formaldehyde, and when the materials are released into the air, It causes air pollution and water pollution, and if it enters the human body by breathing, it causes headache, dizziness, vomiting or irritates the airways, which is the cause of the new house syndrome or chemical hypersensitivity, which is a hot issue. In particular, formaldehyde is the main culprit of sick house syndrome because it causes severe drug smell after construction or construction. This causes people with new homes to suffer from sick house syndrome, causing problems with the skin and respiratory system.

Therefore, various efforts have been made to reduce the concentration of volatile organic compounds remaining in indoor air, such as a method of using a ventilation system that maximizes air circulation or frequent ventilation. However, the original solution is epoxy, which is the main composition of conventional flooring adhesive. The need to develop an environmentally friendly product that replaces and does not emit harmful substances is desperately needed to strengthen the regulation of harmful chemicals and environmental regulations, as well as the increasing interest in the environment and human health. Research and development of functional products is steadily progressing.

In addition, the adhesive used as the laminated wallpaper has recently been introduced with an automatic device for painting paste, so that the coating is applied to a large amount of wallpaper at the time of painting. When it is about 20 minutes, when it exceeds 20 minutes, the problem of poor contact with the adhesive surface of the laminated wallpaper occurs, and the workability is deteriorated. In addition, the existing laminated wallpaper adhesive does not meet the water resistance and flowability at the same time. Therefore, when the water resistance is emphasized, the work speed is reduced due to the decrease in flowability, and when the emphasis is on the work speed, there is a problem that the quality decrease phenomenon occurs due to the decrease in water resistance.

In particular, when the water-based adhesive for laminated wallpaper is exposed to high temperature and high humidity environment after construction, it can create a very harmful environment by the breeding of bacteria and mold.

Korean Patent Laid-Open Publication No. 1999-0049703 relates to a wallpaper adhesive and a method of manufacturing the wallpaper using the same, and particularly, a wallpaper adhesive and a method of manufacturing the wallpaper using the sprayer without spraying water to wallpaper the wallpaper. Although the patent discloses an advantage of providing antimicrobial properties and easy workability, when the water is absorbed into the wallpaper, the wallpaper falls again and thus has a problem in water resistance.

Therefore, it is desired to develop an environmentally friendly and improved water-resistant adhesive for laminated wallpaper since harmful chemicals such as volatile organic compounds and formaldehyde are not discharged after construction using the aqueous adhesive for laminated wallpaper.

An object of the present invention to solve the above problems is to provide an adhesive with improved water resistance in the adhesive for laminated wallpaper.

Another object of the present invention is to provide an adhesive for laminated wall paper having excellent adhesive strength by simultaneously meeting flowability with water resistance.

Still another object of the present invention is to provide an adhesive for laminated wallpaper in which harmful chemicals such as volatile organic compounds and formaldehyde are not emitted.

In order to achieve the above object, the present invention provides a method for preparing an aqueous adhesive for laminated wallpaper, comprising: preparing a polyvinyl acetate polymer emulsion; Preparing an acrylate copolymer emulsion; And it provides a method for producing a water-resistant adhesive for laminated wallpaper comprising the step of mixing 60 to 80% by weight of the polyvinyl acetate polymer emulsion and 20 to 40% by weight of the acrylate copolymer emulsion.

In addition, the present invention is a polyvinyl alcohol 3.2 to 12 parts by weight, vinyl acetate 14 to 34 parts by weight, butyl acrylate monomer 1.4 to 12 parts by weight, nonionic emulsifier based on 100 parts by weight of water in the preparation of the polyvinyl acetate polymerization emulsion It provides 0.02-8 weight part, 0.02-8 weight part of anionic emulsifiers, and 0.02-8 weight part of catalysts, and provides the manufacturing method of the water-resistant adhesive agent for laminated wallpaper characterized by superposing | polymerizing.

In another aspect, the present invention provides a method for producing an aqueous adhesive for laminated wallpaper, characterized in that the catalyst is at least one selected from the group consisting of ammonium persulfate, sodium disulfate, potassium persulfate.

In addition, the present invention is 12 to 25 parts by weight of 2-ethylhexyl acrylate monomer, 6 to 18 parts by weight of n-butyl acrylate monomer, 15 to 40 weight of styrene monomer based on 100 parts by weight of water in the step of preparing an acrylate copolymer emulsion It provides a method for producing a water-resistant adhesive for laminated wallpaper, characterized in that it comprises 0.02 to 8 parts by weight of the non-ionic emulsifier.

In another aspect, the present invention provides an aqueous adhesive for laminated wallpaper produced by the above method.

In addition, the water-based adhesive agent of the present invention provides a water-resistant adhesive for laminated wallpaper, characterized in that the viscosity of the adhesive liquid is 1,000 ~ 1,500cps and the solid content is 20 ~ 35% by weight.

As described above, in the adhesive for laminated wall paper according to the present invention, there is an effect of improving the water resistance.

In addition, the adhesive for laminated wall paper according to the present invention has an effect that can meet the flowability at the same time as the water resistance is improved and the adhesive force is excellent while making the creation quickly.

In addition, the adhesive for laminated wallpaper according to the present invention has the effect that harmful chemicals such as volatile organic compounds and formaldehyde is not discharged.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, it should be noted that in the drawings, the same components or parts denote the same reference numerals as much as possible. In describing the present invention, detailed descriptions of related well-known functions or configurations are omitted in order not to obscure the subject matter of the present invention.

The terms " about ", " substantially ", etc. used to the extent that they are used herein are intended to be taken to mean an approximation to or in the numerical value of the manufacturing and material tolerances inherent in the meanings mentioned, Accurate or absolute numbers are used to help prevent unauthorized exploitation by unauthorized intruders of the referenced disclosure.

1 is a manufacturing process of the aqueous adhesive for laminated wallpaper according to a preferred embodiment of the present invention.

In the manufacturing method of the aqueous adhesive for laminated wallpaper according to an embodiment of the present invention, preparing a polyvinyl acetate polymerization emulsion; Preparing an acrylate copolymer emulsion; And 60 to 80% by weight of the polyvinyl acetate polymer emulsion and 20 to 40% by weight of the acrylate copolymer emulsion to complete the aqueous adhesive for laminated wallpaper with improved water resistance.

First, looking at the step of preparing a polyvinyl acetate polymer emulsion, when preparing a polyvinyl acetate polymer emulsion, 3.2 to 12 parts by weight of polyvinyl alcohol, 14 to 34 parts by weight of vinyl acetate, butyl acrylate 1.4-12 weight part of monomers, 0.02-8 weight part of nonionic emulsifiers, 0.02-8 weight part of anionic emulsifiers, and 0.02-8 weight part of catalysts are mixed and made to react. It is preferable to react for 5 to 8 hours while maintaining the reaction temperature at 75 to 90 ℃.

The reaction mixture is mixed with 3.2 to 12 parts by weight of the polyvinyl alcohol, 14 to 34 parts by weight of the vinyl acetate, and 1.4 to 12 parts by weight of the butyl acrylate monomer, and cohesive force to the aqueous adhesive composition within the above range. By providing this, the adhesive composition can be made to maintain the strength of an appropriate range.

The catalyst which serves to improve the speed of the chemical reaction is preferably selected from the group consisting of ammonium persulfate, sodium disulfate, potassium persulfate.

In addition, the nonionic emulsifier and anionic emulsifier preferably comprises 0.2 to 8 parts by weight. If the nonionic emulsifier and the anionic emulsifier are less than 0.2 part by weight, the surface activity may be poor at the time of adhesion to the synthetic wallpaper including the emulsion state, and if it exceeds 8 parts by weight, the surface activity may be good, but the adhesive strength is lowered and the viscosity is increased. Occurs.

The polyvinyl acetate polymerization emulsion is subjected to aging and stirring to form a complete polymer, which is aged and stirred for about 0.7 to 2.7 hours.

The polyvinyl acetate polymerization emulsion, which has undergone the aging and stirring process, removes residual monomers not involved in the reaction and affects the respiratory and circulatory organs as well as the nervous system in humans, thereby lowering the sensory ability of the peripheral nervous system, carcinogenicity and toxicity. It removes volatile organic substances and formaldehyde containing OH to have eco-friendly features.

Next, look at the steps of preparing an acrylate copolymer emulsion.

In the present invention, it is described that the polyvinyl acetate polymerization emulsion is first prepared, but it is possible to selectively apply the production order of the polyvinyl acetate polymerization emulsion and the production order of the acrylate copolymer emulsion. That is, the acrylate copolymer emulsion may be prepared first or simultaneously with the polyvinyl acetate polymerization emulsion.

12 to 25 parts by weight of 2-ethylhexyl acrylate monomer, 6 to 18 parts by weight of n-butyl acrylate monomer, 15 to 40 parts by weight of styrene monomer and nonionic to 100 parts by weight of water in the step of preparing the acrylate copolymer emulsion 0.02-8 weight part of emulsifiers are mixed and made to react. The reaction temperature is maintained at 40 to 60 ℃ to react for 8 to 10 hours. The reaction temperature is to react at a temperature lower than the general reaction temperature, to increase the reaction time to react at low temperature to form an acrylate copolymer into a stabilized emulsion.

It is preferable that the said nonionic emulsifier contains 0.2-8 weight part. If the nonionic emulsifier is less than 0.2 part by weight, the surface activity may be poor at the time of adhesion with the synthetic wallpaper, including the emulsion state, and if it exceeds 8 parts by weight, the surface activity may be good, but the adhesive strength is lowered and the viscosity is increased.

The acrylate copolymer emulsion is aged and stirred to form a complete polymer, which is aged and stirred for about 0.7 to 2.7 hours.

The acrylate copolymer emulsion, which has undergone the aging and stirring process, removes the residual monomers not involved in the reaction, affects the respiratory and circulatory organs as well as the nervous system in humans, thereby lowering the sensory ability of the peripheral nervous system, carcinogenicity and toxicity. It removes volatile organic substances and formaldehyde containing OH to have eco-friendly features.

Mixing the polyvinyl acetate polymer and acrylate copolymer prepared in the same manner in a constant ratio, the mixing of the polyvinyl acetate polymer emulsion 60 to 80% by weight and the acrylate copolymer emulsion 20 to 40% by weight desirable. The aqueous adhesive prepared within the above range has the property of improving the water resistance and at the same time has excellent adhesive strength, and when working with a laminated wallpaper, there is an effect that can work quickly.

It is possible to complete the water-resistant adhesive for the laminated wallpaper by the above method, the adhesive liquid viscosity of the aqueous adhesive is 1,000 ~ 1,500cps, solid content is 20 ~ 35% by weight, pH is preferably 3-7. (The weight percentage of solids is the weight percentage of the adhesive component to the total weight of the adhesive liquid.) The flowability and water resistance are excellent within the viscosity range, and when the solid content is in the above range, the adhesion to the laminated wallpaper is improved. Can be. When the viscosity of the adhesive is less than 1,000 cps, the flowability is good, the ability to adsorb is increased, but there is a problem that the water resistance is lowered. When the viscosity exceeds 1500 cps, there is a problem that the flow rate is poor and the working speed is reduced.

Hereinafter, embodiments of the present invention will be described in detail.

Example 1

In preparing a polyvinyl acetate polymerization emulsion, 3.5 parts by weight of polyvinyl alcohol, 15 parts by weight of vinyl acetate, 1.6 parts by weight of butyl acrylate monomer, 1 part by weight of nonionic emulsifier, and 1 part by weight of anionic emulsifier And 1 part by weight of the catalyst was reacted at a temperature of 80 ° C. for about 5 hours, and aged and stirred for 1 hour, followed by removal of the residual monomer, the volatile organic compound, and formaldehyde. Ammonium persulfate was used as the catalyst.

In preparing the acrylate copolymer emulsion, 12 parts by weight of 2-ethylhexyl acrylate monomer, 8 parts by weight of n-butyl acrylate monomer, 15 parts by weight of styrene monomer and 1 part by weight of nonionic emulsifier are applied to 100 parts by weight of water. After the reaction was carried out at a temperature of about 8 hours for about 8 hours, aging and stirring for 1.5 hours, the residual monomer, the volatile organic compound, and formaldehyde were removed.

The polyvinylacetate polymerized emulsion and the acrylate copolymerized emulsion prepared above were mixed at 60% by weight and 40% by weight, respectively, to complete the aqueous adhesive.

Examples 2 and 3

In the same manner as in Example 1 to prepare a poly vinyl acetate polymerization emulsion and an acrylate copolymer emulsion, 70% by weight and 30% by weight of the prepared polyvinyl acetate polymerization emulsion and acrylate copolymer emulsion (Example 2), 80% by weight and 20% by weight (Example 3) were mixed to complete the aqueous adhesive.

Example 4

In preparing a polyvinylacetate polymerization emulsion, 12 parts by weight of polyvinyl alcohol, 34 parts by weight of vinyl acetate, 12 parts by weight of butyl acrylate monomer, 8 parts by weight of nonionic emulsifier, and 8 parts by weight of anionic emulsifier And 8 parts by weight of catalyst were reacted at a temperature of 90 ° C. for about 8 hours, and aged and stirred for 2 hours, followed by removal of residual monomer, volatile organic compounds, and formaldehyde. Sodium disulfate and potassium sulfate were used as the catalyst.

In preparing the acrylate copolymer emulsion, 25 parts by weight of 2-ethylhexyl acrylate monomer, 18 parts by weight of n-butylacrylate monomer, 40 parts by weight of styrene monomer and 8 parts by weight of nonionic emulsifier are used based on 100 parts by weight of water. The reaction was carried out at a temperature of about 10 hours, aging and stirring for 2 hours, and then completed by removing residual monomer, volatile organic compounds, and formaldehyde.

The polyvinylacetate polymerized emulsion and the acrylate copolymerized emulsion prepared above were mixed at 60% by weight and 40% by weight, respectively, to complete the aqueous adhesive.

Examples 5 and 6

In the same manner as in Example 4 to prepare a polyvinylacetate polymerized emulsion and an acrylate copolymer emulsion, 70% by weight and 30% by weight of the prepared polyvinylacetate polymerized emulsion and acrylate copolymerized emulsion (Example 5), 80% by weight and 20% by weight (Example 6) were mixed to complete the aqueous adhesive.

Comparative Example 1

In the same manner as in Example 1 to prepare a polyvinylacetate polymerization emulsion and an acrylate copolymer emulsion, but the polyvinylacetate polymerization emulsion and the acrylate copolymerization emulsion was prepared by mixing 50% by weight and 50% by weight of the aqueous adhesive, respectively. Completed.

Comparative Example 2

A polyvinylacetate polymerized emulsion and an acrylate copolymerized emulsion were prepared in the same manner as in Example 4, except that the polyvinylacetate polymerized emulsion and the acrylate copolymerized emulsion were mixed at 45 wt% and 65 wt%, respectively, to prepare an aqueous adhesive. Completed.

※ Analysis method

1.Measure water resistance: Measured according to KS M 3730

2. Domestic tensile strength measurement: measured according to KS K 0533

3. VOC measurement:

Headspace Method (100 ℃ 1Hr), measured according to ISO 11890-2: 2006

4. Formaldehyde: measured according to KS K 7305

division Water resistance Domestic tensile strength Volatile Organic Compounds Formaldehyde Example 1 35 mins 1.0 N Not detected Not detected Example 2 34 mins 0.9 N Not detected Not detected Example 3 36 mins 1.1 N Not detected Not detected Example 4 38 minutes 1.3 N Not detected Not detected Example 5 36 mins 1.1 N Not detected Not detected Example 6 37 mins 1.2 N Not detected Not detected Comparative Example 1 20 minutes 0.7 N Not detected Not detected Comparative Example 2 19 mins 0.6 N Not detected Not detected

※ Experiment result

The laminated wallpaper adhesives prepared in Examples 1 to 6 can be confirmed that the water resistance is improved to 34 to 38 minutes as measured according to KS M 3730. In addition, the aqueous adhesive was confirmed that volatile organic compounds and formaldehyde, which are harmful to humans, were not detected, and that the water-based adhesive strength was also excellent.

The present invention described above is not limited to the above-described embodiment and the accompanying drawings, and various substitutions, modifications, and changes are possible within the scope without departing from the technical spirit of the present invention. It will be evident to those who have knowledge of.

1 is a manufacturing process of the aqueous adhesive for laminated wallpaper according to an embodiment of the present invention.

Claims (6)

In the manufacturing method of the aqueous adhesive for laminated wallpaper, Preparing a poly vinyl acetate polymer emulsion; Preparing an acrylate copolymer emulsion; And 60 to 80% by weight of the polyvinyl acetate polymer emulsion and 20 to 40% by weight of the acrylate copolymer emulsion. The method of claim 1, 3.2 to 12 parts by weight of polyvinyl alcohol, 14 to 34 parts by weight of vinyl acetate, 1.4 to 12 parts by weight of butyl acrylate monomer, and 0.02 to 8 parts by weight of nonionic emulsifier based on 100 parts by weight of water in the preparation of the polyvinyl acetate polymerization emulsion A method for producing an aqueous adhesive for laminated wallpaper comprising water, containing 0.02 to 8 parts by weight of anionic emulsifier and 0.02 to 8 parts by weight of catalyst. The method of claim 2, Wherein the catalyst is ammonium persulfate, sodium disulfate, potassium persulfate is a method for producing a water-based adhesive adhesive for laminated wallpaper, characterized in that at least one selected from the group consisting of. The method of claim 1, 12 to 25 parts by weight of 2-ethylhexyl acrylate monomer, 6 to 18 parts by weight of n-butyl acrylate monomer, 15 to 40 parts by weight of styrene monomer and nonionic to 100 parts by weight of water in the step of preparing the acrylate copolymer emulsion An emulsifier 0.02 ~ 8 parts by weight, characterized in that the water-soluble improved adhesive for wall paper, characterized in that the manufacturing method. An aqueous adhesive for laminated wallpaper produced by the method according to any one of claims 1 to 4. The method of claim 5, The aqueous adhesive is a water-based adhesive adhesive for laminated wall paper, characterized in that the viscosity of the adhesive liquid is 1,000 ~ 1,500cps and the solid content is 20 ~ 35% by weight.

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