JPH10212466A - Paste composition for wallpapering - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the subject composition, containing no toxic substance such as formalin and capable of safely peeling a wallpaper without damaging the wall surface even for a material without a high surface strength and excellent in preservation stability, aging resistance, etc., by compounding an N- vinylamide-based polymer with a vinyl resin emulsion. SOLUTION: This composition for wallpapering is obtained by compounding (A) a polymer comprising an N-vinylamide (preferably an N-vinylacetamide) as a principal component of monomers with (B) a vinyl resin emulsion so as to provide (5:95) to (65:35) ratio expressed in terms of weight ratio of solids. When the components are compounded, a 2-50% aqueous solution of the component A is preferably compounded with the component B at 10-60% solid content so as to afford the above ratio. A cross-linked N-vinyl (co)polymer can be used as the component A in order to improve the spinnability of a paste and operations to paste the wallpaper. An emulsion of a vinyl acetate homopolymer, an emulsion of a copolymer of vinyl acetate and ethylene, etc., are preferred as the component B.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a decorative cardboard, plastic film, woven fabric or nonwoven fabric used for reinforcing or decorating indoors or outdoors of a building, furniture, furniture, etc. This is a glue with excellent adhesiveness, water resistance, and mold resistance compared to the conventional glue for wallpaper, and is used for construction, woodwork, and vehicles. It can be widely used in the field of sticking wallpaper and the like of living parts such as ships.

[0002]

2. Description of the Related Art Vinyl wallpaper and woven wallpaper are usually coated with a rewetting adhesive on the back as a wallpaper for home use, and when used, they are moistened with water to impart tackiness to the adhesive. Although it is affixed, the wallpaper used by professionals uses wallpaper without glue on the back side and is affixed with a starch-based adhesive. This starch-based adhesive has good workability and is inexpensive and easy to use, but has the drawback that it easily rots and generates mold and has low water resistance. For this purpose, various improvements have been made, including those to which a preservative and a fungicide are added, and those to which a water-proofing agent is added to improve water resistance. However, there is a limit even if such measures are taken, and preservatives and fungicides cannot be expected to cure sufficiently,
It is harmful if added in large amounts.

Further, when wallpaper is applied to walls such as concrete or gypsum board, these walls absorb moisture in the air, so that the applied paste always contains moisture, causing decay and decay. Causes mold.
For this reason, at the seam of the pasted wallpaper, it is often experienced that black mold or the like emerges from the inside and is unsightly. Formalin (formaldehyde aqueous solution) is commonly used as a preservative and fungicide for starch paste
Almost all formalin is contained in commercial starch paste for wallpaper. Not only is the antiseptic and antifungal action of this formalin insufficient, but it also has environmental health problems, as is well known, and children and sick people may be poisoned by formalin. Therefore, there has been a demand for the development of a non-formalin and highly safe paste for wallpaper.

Further, when wallpaper is applied to a material having relatively low surface strength, such as gypsum board, using a starch-based paste, the surface of the gypsum board is simultaneously removed when the old wallpaper is peeled off when the wallpaper is replaced. After peeling off, the surface of the board became uneven, and when applying new wallpaper, it was necessary to apply putty to the board surface and smooth it before applying the wallpaper. As a result, the labor cost increases, and when the old wallpaper is peeled off, only the paper on the surface of the gypsum board is peeled off, and there has been a demand for the development of a paste that does not cause unevenness on the board surface. For this reason, various water-soluble adhesives have been studied in place of starch-based pastes, but all of them have drawbacks and have not been put to practical use. For example, POVAL (polyvinyl alcohol) has the disadvantage that when it is made into a high-viscosity aqueous solution suitable for wallpaper application, it thickens during storage and gels easily. Sodium polyacrylate absorbs carbon dioxide gas in the air and the viscosity increases. However, hydroxyethylcellulose has a problem that the antiseptic property and the antifungal property are insufficient.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned disadvantages of the starch-based paste which are likely to cause spoilage and mold. First of all, it does not contain harmful substances such as formalin to prevent rot and mold generation, which are the drawbacks of starch paste, and even if it is a material with relatively low surface strength such as gypsum board, wallpaper replacement Sometimes the old wallpaper can be peeled off safely without damaging the wall, storage stability, aging resistance,
It is an object of the present invention to provide a paste composition for wallpaper sticking, which is a paste material having water resistance and which can be adopted with sufficient workability by a conventional method of sticking a mechanically or manually stuck wallpaper.

[0006]

Means for Solving the Problems In order to overcome the drawbacks of conventional starch-based pastes, the inventors of the present invention applied a polymer having N-vinylamide as a main component as a synthetic polymer to paste wallpaper. The formulation of the vinyl resin emulsion was found to be suitable. That is, (1) a polymer containing N-vinylamide as a main component of a monomer and a vinyl resin emulsion in a solid content weight ratio of 5:95 to 65:35.
(2) a polymer containing N-vinylamide as a main component, which is composed of N-vinylamide homopolymer or N-vinylamide, acrylic acid, acrylate, Methacrylic acid, methacrylate,
A monomer selected from at least one of acrylic acid ester, methacrylic acid ester, acrylonitrile, acrylamide, methacrylamide, 2-acrylamido-2-methylpropanesulfonic acid, a salt thereof, vinyl ether and vinyl carboxylate The paste composition for pasting wallpaper according to the above (1), which is a copolymer of (3) N-
Polymer containing vinylamide as a main component of the monomer, N-vinylamide homopolymer crosslinked product or N-vinylamide, acrylic acid, acrylate, methacrylic acid, methacrylate, acrylate, methacrylate, (C) a crosslinked copolymer with a monomer selected from at least one of acrylonitrile, acrylamide, methacrylamide, 2-acrylamide-2-methylolpropanesulfonic acid, a salt thereof, vinyl ether and vinyl carboxylate ( 1) or the paste composition for pasting wallpaper according to (2),

(4) The vinyl resin emulsion is composed of vinyl acetate homopolymer or vinyl acetate, at least one of acrylic acid ester, methacrylic acid ester, acrylamide, C3 to C10 alkylcarboxylic acid vinyl ester, and ethylene. The paste composition for wallpaper application according to any one of the above (1) to (3), which is a copolymer emulsion with a monomer selected from the group consisting of: (5) a vinyl resin emulsion comprising acrylic ester, methacrylic acid Emulsion of a homopolymer of an ester or a copolymer of both, or a copolymer of an acrylate and / or a methacrylate and a monomer selected from styrene, acrylamide, methacrylamide, and acrylonitrile Any of the above (1) to (4) Wallpaper sticking paste composition according to,
(6) The above (1) to (1) to (10), wherein a filler is added in an amount of 0.1 to 30% by weight based on the total weight of the solid content of the polymer having N-vinylamide as a main component of the monomer and the vinyl resin emulsion. The paste composition for wallpaper application according to any one of (5) and (7) The paste composition for wallpaper application according to any one of the above (1) to (6), wherein the N-vinylamide is N-vinylacetamide. The above object was achieved by developing a product.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, "N-vinylamide" used as a monomer is preferably N-vinylcarboxylic acid amide represented by the following general formula (1).

Embedded image (Wherein, R ¹ and R ² each independently represent a hydrogen atom, a methyl group or an ethyl group.) Specifically, N-vinylformamide, N-methyl-N-vinylformamide, N-vinylacetamide, N-vinylacetamide -Methyl-N-vinylacetamide and the like. Particularly preferred is N-vinylacetamide. Hereinafter, the present invention will be described using N-vinylacetamide as a representative.

[0009] In the paste composition for sticking wallpaper of the present invention, N
-The compounding ratio of the polymer containing vinylamide as a main component of the monomer and the vinyl resin emulsion is 5:95 in terms of solid content weight ratio.
６０60: 40 was found to be appropriate. If the amount of the polymer containing N-vinylamide as the main component is larger than this, the water resistance of the paste is reduced, and if the amount of the polymer containing N-vinylamide as the main component is small, the viscosity is reduced. And workability is reduced. In the compounding, the component ratio of a composition obtained by mixing a 2 to 50% aqueous solution of a polymer containing N-vinylamide as a main component of a monomer and a vinyl resin emulsion having a solid content of 10 to 60% is calculated as solid content. 5: 95-60: 4
Set to 0. Mixing can be easily performed at room temperature with a normal stirrer, and when a filler is added, a mixture of a polymer aqueous solution or an aqueous dispersion containing N-vinylamide as a main component of a monomer and a vinyl resin emulsion is used. A filler dispersed in powder or water is added, and the mixture is sufficiently dispersed by stirring with a homomixer or the like. The amount of the filler to be added is suitably 0.1 to 30% by weight based on the total weight of the solid content of the polymer having N-vinylamide as a main component of the monomer and the vinyl resin emulsion.

The polymer containing N-vinylamide as a main component of the polymer which can be used in the present invention has a viscosity of 1% aqueous solution or aqueous dispersion measured at 20 ° C. and 20 rpm using a B-type rotational viscometer.
When measured in m, those in the range of 100 to 200,000 cp are suitable. Further, a polymer containing N-vinylamide as a main component of a monomer is used to increase various thixotropic properties and water resistance. For example, acrylic acid, its salt, methacrylic acid, its salt, acrylic acid Ester, methacrylate, acrylonitrile, acrylamide, methacrylamide, 2-acrylamide-2
A copolymer with a monomer selected from at least one of methylpropanesulfonate, a salt thereof, a vinyl ether and a vinyl carboxylate can also be used. Also,
A crosslinked N-vinylamide homopolymer in the presence of a crosslinking agent having two or more polymerizable double bonds in one molecule to suppress the spinnability of the glue and improve the gluing work on the wallpaper, or An N-vinylamide copolymer crosslinked product obtained by copolymerization can also be used. Further, when a polymer crosslinked product of N-vinylamide obtained by copolymerization with N-vinylamide was used, as shown in Example 6, the amount of addition could be significantly reduced, It is possible to prepare a composition having an addition amount of less than 10:90 in terms of the solid content weight ratio of the polymer as the main component of the polymer to the vinyl resin emulsion and having a viscosity that does not lower the workability of wallpaper application.

Specific examples of the crosslinking agent include N, N'-methylenebisacrylamide, ethylene glycol di (meth) acrylate, and triethylene glycol di (meth).
Compounds having a plurality of (meth) acryl groups such as acrylate and pentaerythritol tri (meth) acrylate, N, N'-butylenebis (N-vinylacetamide), N, N'-diacetyl-N, N'-divinyl-
N, such as 1,4-bisaminomethylcyclohexane,
N'-alkylenebis (N-vinylcarboxylic acid amide)
A compound having two or more allyl groups such as a compound, diethylene glycol diallyl ether, trimethylolpropane triallyl ether, tetraallyloxyethane, pentaerythritol triallyl ether, diallyl adipate, diallyl terephthalate, and a vinyl group such as divinylbenzene Or more compounds, divinyl oxalate, divinyl succinate, divinyl malonate, divinyl adipate, divinyl maleate, trivinyl citrate,
Examples thereof include compounds having two or more vinyl ester structures such as tetravinyl pyromellitic acid, and these can be used alone or as required.

These polymer-based polymers containing N-vinylamide as a main component can be produced by conventionally employed aqueous solution polymerization, reverse phase suspension polymerization, precipitation polymerization and the like. The solvent to be used is appropriately selected depending on the polymerization method, and water, alcohol, hexane, ethyl acetate and the like are used. The polymerization initiator used in the production of the (co) polymer is a conventionally known peroxide, an organic peracid, an inorganic peracid or a salt thereof, an azobis compound alone,
Alternatively, redox-based ones are used in combination with a peroxide and a reducing agent, and particularly preferred among these are azobis-based initiators such as azobisisobutyronitrile and azobis (2-amidinopropane) dihydrochloride. Agent. The polymerization initiation temperature is usually about -10 to 80C, and the reaction time is about 0.5 to 30 hours. In the aqueous solution polymerization, the obtained water-containing mass is dried and pulverized to obtain a predetermined particle size. In the reverse phase suspension polymerization, the obtained beads are filtered, dried, and pulverized if necessary. Furthermore, in the precipitation polymerization, the precipitated precipitate is filtered and dried. Use as an aqueous solution for use.

The vinyl resin emulsion can be produced by emulsion polymerization of a vinyl monomer. As vinyl monomers, vinyl acetate, propionate, and carbon number 9
10 to 10 vinyl carboxylate esters of branched alkyl carboxylic acid, vinyl palmitate, vinyl stearate, etc., methyl acrylate, ethyl acrylate, butyl acrylate, 2-ethylhexyl acrylate, glycidyl acrylate, hydroxy acrylate Ethyl, hydroxypropyl acrylate, ethylene glycol acrylate, diethylene glycol acrylate,
Acrylic esters such as polyethylene glycol acrylate, propylene glycol acrylate, dipropylene acrylate, polypropylene glycol acrylate, butanediol acrylate, trimethylolpropane acrylate, and pentaerythritol acrylate, methyl methacrylate, ethyl methacrylate, butyl methacrylate, methacrylic acid-2 -Ethylhexyl, glycidyl methacrylate, hydroxyethyl methacrylate, hydrohexyl methacrylate, ethylene glycol methacrylate, diethylene glycol methacrylate, polyethylene glycol methacrylate, propylene glycol methacrylate, dipropylene glycol methacrylate, polypropylene glycol methacrylate, butanedi Ethyl methacrylate, trimethylolpropane methacrylate, methacrylic acid ester such as pentaerythritol methacrylate, styrene, acrylamide, methacrylamide, acrylonitrileacrylic acid, methacrylic acid homopolymer or copolymer emulsion of a monomer selected from methacrylic acid and the like Is used. Further, in the case of vinyl acetate, a copolymer with ethylene is excellent.

An emulsion is produced by emulsion polymerization of the above monomers. Examples of preferred monomer combinations are as follows. a. Vinyl acetate alone, b. A combination of vinyl acetate and a vinyl ester of a branched alkyl carboxylic acid having 9 to 10 carbon atoms, c. Vinyl acetate and ethylene, d. Butyl acrylate, methyl methacrylate, methacrylic acid, hydroxyethyl methacrylate, e. 2-ethylhexyl acrylate, butyl methacrylate, styrene, glycidyl methacrylate, acrylamide, methacrylic acid Of course, the above are merely examples, and the present invention is not limited to this formulation.

The polymerization may be a normal emulsion polymerization,
An aqueous solution in which a polymerization initiator, an emulsifier, a protective colloid and the like are dissolved is stirred and heated, and the monomer is dropped and reacted. As a polymerization initiator, a water-soluble polymerization initiator such as potassium persulfate or hydrogen peroxide is used, and as an emulsifier, a surfactant such as sodium alkylbenzene sulfonate, polyethylene glycol alkyl ether, or sodium polyethylene glycol nonylphenyl sulfonate is used. As the protective colloid, polyvinyl alcohol, polyacrylamide, a water-soluble copolymer of acrylic acid ester and acrylic acid, or the like is used. The concentration of the produced vinyl resin emulsion is 30 to 60% solids, and the residual monomer is 1%
The following are suitable:

The mixture of the aqueous polymer solution containing N-vinylamide as the main component of the monomer and the vinyl resin emulsion is in the range of 5:95 to 65:35, preferably 20:80 to 60:60, in terms of solids weight ratio. It is in the range of 40. For example, when 50 parts by weight of a 5% aqueous polymer solution containing N-vinylamide as a main component of a monomer and 5 parts by weight of a vinyl acetate resin emulsion having a concentration of 50% are mixed, N-vinylamide becomes a main component of the monomer. The solid content weight ratio of the polymer to be used and the vinyl acetate resin is 50:50. The weight ratio of the solid content of the polymer having N-vinylamide as the main component of the monomer and the vinyl resin is 5:
When the ratio is out of the range of 95 to 65:35, a problem occurs in the adhesiveness. That is, when the proportion of the polymer containing N-vinylamide as a main component is larger than this, not only the adhesive strength of the paste is low but also the water resistance is reduced, and on a humid day, the wallpaper is naturally peeled off. I do. If the proportion of the polymer containing N-vinylamide as the main component is smaller than this, the viscosity of the paste is too low, and the workability is poor, making it difficult to apply the paste uniformly to the wallpaper.

In the mixing, a polymer aqueous solution containing N-vinylamide as a main component of a monomer is placed in a container, and a vinyl resin emulsion is added with stirring to achieve uniform mixing. When a filler is added to this paste mixture, workability as a paste is often improved. By adding filler,
As the viscosity increases, the thixotropy increases, preventing blocking when the paste is dried, improving the heat resistance of the paste, and in some cases, increasing the adhesive strength. As a method of mixing the filler, the filler is added to an aqueous polymer solution or a vinyl resin emulsion containing N-vinylamide as a main component of the monomer, or a mixture of both, and the mixture is stirred and uniformly mixed. In the case of a filler that is difficult to disperse in water, add the filler powder in water in which the dispersant is dissolved in advance, add the filler powder in water in which the dispersant is dissolved evenly and knead well, knead well and uniformly disperse, This is added to the glue solution.
The amount of the filler added is 0.1 to 30 of the total size (solid content).
%, Desirably 0.5 to 20%. When the amount of the filler exceeds 30%, the adhesive strength of the paste decreases, and the viscosity of the paste increases, making application difficult. When the amount of the filler is less than 0.1%, no improvement effect on the viscosity, blocking resistance, heat resistance and the like of the paste is observed at all.

The filler to be added to the paste composition for wallpaper application includes calcium carbonate, magnesium carbonate, clay, talc, mica, aluminum hydroxide, aluminum oxide,
Powders such as silicon oxide and cellulose are used. Of these, aluminum hydroxide is effective in giving the glue thixotropic properties. An antifoaming agent, a leveling agent, an antiseptic and a fungicide may be added to the paste thus produced. Further, a stabilizer such as soda ash can be added.

The application of wallpaper using the paste composition for adhering wallpaper of the present invention can be carried out in the same manner as ordinary starch paste. When the paste composition for adhering wallpaper of the present invention is applied to the back of a vinyl wallpaper, a textile wallpaper, or the like, and the wallpaper is attached to a wall and pressed lightly, complete adhesion can be achieved in about 5 minutes. The amount of application depends on the solid content in the paste, but is usually from 100 g to 500 g per m ² . The base material on which the wallpaper is to be applied is gypsum board, mortar-finished concrete, plywood-like building walls, ceilings, doors, partitions, and other building interiors, as well as metals, plastics, woven fabrics, nonwoven fabrics, wood, or painted surfaces Surface materials such as ships, vehicle interior materials,
It can be applied to furniture, fittings and furniture.

The paste can be applied to the wallpaper by hand coating with a brush or by mechanical coating with a roll coater or the like. In addition to pasting the paste on the base material as it is, glue the surface pasted on the endless wallpaper, fold it, and put it in a packaging material such as a polyethylene film bag so that the moisture in the paste does not evaporate. After sealing, transporting and storing, take it out of the bag if necessary and cut it appropriately.
There is also a method of pasting.

The present invention has excellent adhesive strength, water resistance, and aging resistance as a paste composition for wallpaper application, is antiseptic, and hardly generates mold. Especially when used for materials with relatively low surface strength, such as gypsum board, the paste penetrates into the base material and hardens the surface layer. Also, since the gypsum board surface is not peeled off at the same time and the substrate surface is not damaged, there is a feature that a new wallpaper can be stuck without using a putty to smooth the surface. Hereinafter, Examples are shown, but these are only a part of the present invention and do not represent the entire invention.

[0022]

【Example】

Example 1 A polymer containing N-vinylamide as a main component of a monomer (having a 2% aqueous solution viscosity of 3000 c at 30 ° C.)
p) 30 g was dissolved in 470 g of water to make a 6% aqueous solution, and a polyvinyl acetate emulsion (an emulsion produced using polyvinyl alcohol as a protective colloid, having a concentration of 50% and a viscosity at 30 ° C. of 32%) was prepared. 000
cp) 60 g was added and stirred to mix uniformly. To this, 10 g of silicon oxide powder having an average particle size of 0.2 μm was added and kneaded to prepare a paste composition for wallpaper application. This glue,
The coating was uniformly applied at a rate of 200 g / m ^{2 on} the back of a vinyl chloride wallpaper and immediately attached to a gypsum board. The peel strength after leaving at room temperature for 1 hour was 700 g / 25 mm.
When the wallpaper was peeled off after 60 days, the paste was peeled off with the gypsum board backing attached, and no irregularities were formed on the gypsum board surface. The paste was left at 30 ° C. in the air for one month. Although the formalin (formaldehyde) was not added to the paste composition for wallpaper application of the present invention, there was no abnormality on the surface of the paste. Black mold was formed on the entire surface. 0.2% formaldehyde was detected in this commercial starch paste.

Example 2 A 10% aqueous solution was prepared by dissolving 50 g of a polymer containing N-vinylamide as a main component of a monomer (2% aqueous viscosity at 30 ° C. and 2500 cp grade) in 450 g of water. This was mixed with a vinyl acetate ethylene copolymer emulsion (an emulsion obtained by emulsion polymerization using an emulsifier and having a concentration of 55% and a viscosity at 30 ° C of 350%).
0 cp, the polymerization ratio between vinyl acetate and ethylene is 8 by weight.
6:14) 60 g was added and mixed with stirring. To this, 8 g of pulp powder (average particle size: 0.5 mm) was added and kneaded to obtain a paste composition for pasting wallpaper. This paste is uniformly applied at a rate of 300 g / m ² to the back of a plain-woven fiber wallpaper,
Immediately attached to the plywood ceiling. The peel strength after one hour at room temperature was 820 g / 25 mm. Even though no formalin was added to the paste composition for pasting wallpaper, no mold was generated even when left at room temperature for one month.

(Example 3) A 5% aqueous solution was prepared by dissolving 25 g of a polymer containing N-vinylamide as a main component of a monomer (having a 2% aqueous solution viscosity of 6000 cp at 30 ° C.) in 475 g of water. It has a composition by weight of butyl acrylate: methyl methacrylate: hydroxyethyl methacrylate: methacrylic acid = 48: 40: 10: 2, a concentration of 55% and a viscosity at 30 ° C. of 1600.
60 g of cp acrylic emulsion was added and stirred to form a uniform mixture. Using a roll coater on the back of a vinyl chloride wallpaper in which this paste was rolled endlessly,
g / m ² , coated with a gluing machine using a folding machine, and folded to a length of 1 m, wrapped in a polyethylene sheet, and heat-sealed at the end for storage. One week later,
It was opened at the construction site and stuck on the surface of mortar-finished concrete. Peel strength after 1 hour is 590g / 25m
m.

Example 4 Polymer containing N-vinylamide as a main component of monomer / sodium acrylate = 90/10
(Weight ratio) 42 g of a copolymer (grade having a viscosity of 7000 cp and a mean particle size of 80 μm in a 2% aqueous solution at 30 ° C.)
Was dissolved in 470 g of water to form a 6% aqueous solution, and a styrene / acrylic copolymer emulsion [styrene: butyl acrylate: isobutyl methacrylate: glycidyl methacrylate: hydroxypropyl methacrylate: methacrylic acid = 30: 48: A concentration of 50% at a composition ratio (weight) of 10: 6: 4: 2 and a viscosity at 30 ° C. of 2300 cp] 80
g was added and stirred to obtain a uniform mixture (aqueous dispersion). To this mixture, 40 g of calcium carbonate powder and 8 g of pulp powder were added and kneaded well to obtain a paste composition for pasting wallpaper. This was applied to the back of a vinyl chloride wallpaper at a rate of 200 g / m ² and immediately stuck to a gypsum board. The peel strength after one hour was 780 g / 2.5 cm.

Example 5 A crosslinked polymer of N-vinylacetamide [N-vinylacetamide / N, N'-diacetyl-N, N'-divinyl-1,4-bisaminomethylcyclohexane = 100/3 ( (Weight ratio); a 1% aqueous solution having a viscosity of 200 cp measured at 20 ° C. and 20 rpm using a B-type rotational viscometer was dispersed in 720 g of 16,790 g of water to form a 4.1% aqueous dispersion. Polyvinyl acetate emulsion [Polysol 2 manufactured by Showa Polymer Co., Ltd.]
070L, 47% concentration, 30 using a B-type rotational viscometer
At 5,000 cp] 2, measured at 10 rpm
270 g was added, stirred and uniformly mixed. 250 g of silicon oxide powder having an average particle size of 0.2 μm was added thereto and kneaded to prepare a paste composition for wallpaper application. This paste was uniformly applied to the back of the vinyl chloride wallpaper at a rate of 160 g / m ² and immediately stuck to a gypsum board. The peel strength after standing at room temperature for 1 hour was 6900 g / 25 mm. The wallpaper affixed using this glue composition for affixing the wallpaper,
No mold was found even after one year.

Example 6 A cross-linked copolymer containing N-vinylacetamide as a main component [N-vinylacetamide /
Acrylic acid / N, N'-diacetyl-N, N'-divinyl-1,4-bisaminomethylcyclohexane = 70 /
30/3 (weight ratio): 20 ° C. using a B-type rotational viscometer,
The viscosity after neutralization with a 1% aqueous solution of sodium hydroxide measured at 20 rpm was 200,000 cp].
Dispersed in 40 g of water to make a 5.4% aqueous dispersion, and polyvinyl acetate emulsion [Showa Polymer Co., Ltd.
Polysol 2070L, concentration 47%, viscosity measured at 30 ° C. and 10 rpm using a B-type rotational viscometer was 5,000.
cp], 2,270 g, and the mixture was stirred and uniformly mixed.
250 g of silicon oxide powder having an average particle diameter of 0.2 μm was added thereto and kneaded, and then 18 g of sodium bicarbonate was added to 100 ml of water.
g) and mixed for 1 hour to prepare a paste composition for wallpaper application. Put this paste on the back of the vinyl chloride wallpaper.
It was applied uniformly at a rate of 00 g / m ² and immediately stuck to a gypsum board. The peel strength after standing at room temperature for 1 hour was 740 g / 25 mm. No mold was observed on the wallpaper stuck using the paste composition for sticking wallpaper even after one year.

[0028]

EFFECT OF THE INVENTION The paste composition for wallpaper application of the present invention is a problem of starch-based pastes conventionally used for professional wallpaper application, in that rot and mold are easily generated,
Also, it is not necessary to add a preservative such as formalin (formaldehyde), which has been used to prevent it, and has excellent antiseptic and antifungal properties, and does not have relatively high surface strength such as gypsum board. Even in the material, the glue penetrates the inside of the base material to form a hard surface layer,
As a result, the wallpaper can be safely removed without damaging the base material surface, and even after the paste composition is prepared, the viscosity does not change much, the pot life is long, the storage stability is high, and the application is performed after application. Even when the container is hermetically packaged with a polyethylene film or the like, it can be stored for a long period of time and has excellent water resistance and is an excellent paste composition for wallpaper application. This paste composition for wallpaper application is a paste composition for wallpaper application that can be directly applied to conventional hand application and mechanical application and has excellent workability.

Claims (7)

[Claims] 1. A wallpaper paste characterized in that a polymer containing N-vinylamide as a main component of a monomer and a vinyl resin emulsion are blended at a solid content weight ratio of 5:95 to 65:35. Glue composition. 2. A polymer comprising N-vinylamide as a main component of a monomer comprising N-vinylamide homopolymer or N-vinylamide and acrylic acid, acrylate, methacrylic acid, methacrylate, acrylate Methacrylic acid ester, acrylonitrile, acrylamide, methacrylamide, 2-acrylamido-2-methylpropanesulfonic acid, a salt thereof, a vinyl ether, a copolymer with a monomer selected from at least one of vinyl carboxylate The paste composition for wallpaper application according to claim 1, which is a union. 3. A polymer comprising N-vinylamide as a main component of a monomer comprising a crosslinked product of N-vinylamide homopolymer or N-vinylamide, acrylic acid, acrylate, methacrylic acid, methacrylate, acryl Acid ester, methacrylic acid ester, acrylonitrile, acrylamide, methacrylamide, 2-acrylamide-2-methylolpropanesulfonic acid, a salt thereof, vinyl ether,
The paste composition for wallpaper application according to claim 1 or 2, which is a crosslinked product of a copolymer with at least one monomer selected from vinyl carboxylate. 4. A vinyl resin emulsion comprising a vinyl acetate homopolymer or vinyl acetate and an acrylic ester,
Methacrylic acid ester, acrylamide, carbon number 3-1
The paste composition for wallpaper application according to any one of claims 1 to 3, which is a copolymer emulsion with a monomer selected from at least one of alkyl carboxylate vinyl ester and ethylene. 5. A method according to claim 1, wherein the vinyl resin emulsion comprises a homopolymer of acrylate ester or methacrylate ester or a copolymer emulsion of both, or an acrylate ester and / or methacrylate ester and styrene, acrylamide, methacrylamide or acrylonitrile. The paste composition according to any one of claims 1 to 4, which is a copolymer emulsion with a monomer selected from at least one kind. 6. The filler according to claim 1, wherein the filler is added in an amount of 0.1 to 30% by weight based on the total weight of the solid content of the polymer containing N-vinylamide as a main component of the monomer and the vinyl resin emulsion. A paste composition for wallpaper application according to any one of claims 1 to 5. 7. The paste composition for application to a wallpaper according to claim 1, wherein the N-vinylamide is N-vinylacetamide.