JPH11116898A - Surface modifying agent for wall paper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a surface modifying agent for a wall paper, capable of clearing various problems existing at the surface part of the wall paper without adopting a conventional film laminate processing. SOLUTION: This surface modifying agent for a wall paper contains 2 components of at least one kind each selected from (A) a synthetic resin having >=50 deg.C softening point and (B) a silicone resin or a fluorine resin as indispensable components, or 3 components of at least one kind each selected from (A) a synthetic resin having >=50 deg.C softening point and (B) a silicone resin or a fluorine resin, and (C) silicon dioxide and/or a cross-linking agent as indispensable components.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface modifier mainly for wallpaper for interior decoration.

[0002]

2. Description of the Related Art Various attempts have been made to modify the surface of wallpaper used for interior decoration. This is a reversal of the fact that these wallpapers had various problems during actual use, and in particular, the following points were improved on the surface that is easily noticed by general users. It has been strongly desired to do so.

[0003] For example, (1) In a PVC foamed wallpaper in which a composition mainly composed of a PVC plastisol paste is applied on a substrate, the plasticizer bleeds over the surface of the surface over time, so that the surface becomes tacky. It gives a feeling and becomes very easy to become dirty.

(2) Further, the surface of the foamed PVC wallpaper tends to have an unfavorable luster, which may impair the appearance.

(3) Even in the case of an aqueous foamed wallpaper in which an aqueous emulsion is coated on a base material, the surface portion thereof is tacky due to the inherent properties of the resin component constituting the emulsion, similarly to the PVC foamed wallpaper. It gives a feeling and becomes very dirty.

(4) In the case of the water-based foamed wallpaper, the problem of open time and the problem of opening often appear as disadvantages.

(5) As a problem that can be said about foamed wallpaper in general,
The surface state after foaming becomes rough, not only the touch feeling is bad,
This may cause dirt to adhere.

(6) Further, since the water resistance and the solvent resistance are not sufficient, it is difficult to easily wash off the stains once adhered.

(7) Surface physical strength such as friction resistance is poor.

As one means for improving these points, a method of laminating the surface of a foamed wallpaper with various films such as olefin, acrylic and urethane has been widely adopted.

However, in these processing methods, the problem of poor adhesion between the film and the surface portion of the wallpaper, or when embossing and laminating are performed simultaneously, only the embossed concave portions of the wallpaper are in contact with the film. It becomes an adhesion point, and the protruding portions are liable to cause problems such as "floating" of the film resulting from the fact that they are not substantially adhered, so that the film is peeled or torn, impairing the aesthetic appearance,
On the contrary, such a portion has a problem that is extremely unfavorable, such as becoming a point where dirt adheres.

Further, curling may occur due to the difference in the degree of expansion and contraction between the wallpaper and the film, making it difficult to attach the film to the wall, resulting in poor work efficiency, and the film itself being relatively expensive. Because of these points,
It also had disadvantages in terms of economy.

[0013]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has as its object to solve the problem of using a conventional method for laminating a film without using a conventional film laminating method. An object of the present invention is to provide a surface modifier for wallpaper which can eliminate various problems existing in the above.

[0014]

Means for Solving the Problems The present inventors have conducted various studies in order to achieve the above object, and as a result, have found that a specific
It was found that the above-mentioned problems could be completely solved by coating the surface of the wallpaper with a surface modifier using a combination of resin components.
Further, the present inventors have made further studies and completed the present invention.

That is, the present invention is as described below.

1. A surface modifier for wallpaper containing at least two components selected from (A) a synthetic resin having a softening point of 50 ° C. or higher and (B) a silicone resin or a fluororesin as essential components.

2. Essential components include (A) a synthetic resin having a softening point of 50 ° C. or higher, (B) at least one selected from silicone resins and fluororesins, and (C) silicon dioxide and / or a crosslinking agent. Surface modifier for wallpaper.

3. The surface modifier for wallpaper as described in 1 or 2 above, wherein the synthetic resin (A) is a (meth) acrylic resin, a urethane resin or a polyolefin resin.

4. The surface modifier for wallpaper according to the above item 2 or 3, wherein the crosslinking agent (C) is a blocked isocyanate compound.

5. Wallpaper having the surface modifier described in 1, 2, 3 or 4 coated on the surface.

The term "softening point" as used in the present invention refers to "the temperature at which a resin starts to take a tacky feeling when formed into a film".

In the present invention, in particular, when the above two types of resin components are used in combination, when this is processed into wallpaper, surprisingly,
It is based on a new discovery that a synergistic effect is exhibited, and a wallpaper having excellent properties not seen before, that is, surface non-adhesion, surface antifouling property, etc., can be obtained.

In the present invention, in addition to the above-mentioned effects, by using a cross-linking agent such as silicon dioxide and / or a blocked isocyanate compound, the surface is excellent in matting properties, water resistance, friction resistance and the like. Can be obtained.

As described above, the wallpaper of the present invention has very excellent properties in terms of surface non-adhesion, surface antifouling properties, water resistance, friction resistance, surface matting properties, etc. However, it is a surprising result that such an extremely high-performance wallpaper can be obtained in spite of the extremely simple processing means of processing, as compared with the conventional film lamination processing.
This is an economically advantageous method.

From the above, it can be seen that the discovery of the surface treatment agent of the present invention is of great value.

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

The component (A) is composed of a synthetic resin having a softening point of 50 ° C. or higher. This component prevents the occurrence of blocking during winding and storage after coating on wallpaper. At the same time, it is possible to prevent the surface from having tackiness (tackiness) after being attached to the wall surface.

As the component (A), any type can be used as long as its softening point is 50 ° C. or higher.
(Meth) acrylic, urethane, polyolefin,
Examples include polyester-based, polyamide-based, PVC-based, and PVC-vinyl acetate copolymer-based. For example, (meth) acrylic resin, urethane resin, polyolefin resin and the like are preferably used.

As the component (A), the above-mentioned synthetic resins may be used alone, or two or more of them may be used as a mixture without any problem.

In any case, it is essential to use the component (A) having a softening point of 50 ° C. or higher, and below 50 ° C., the intended purpose cannot be achieved.

Next, the component (B) is composed of at least one selected from silicone resins and fluororesins, which imparts antifouling properties.

Examples of the silicone resin include those having a polysiloxane structure which may have an arbitrary substituent and those obtained by copolymerizing an acrylic polymer with the polysiloxane structure, but are not limited thereto. Not something.

Examples of the fluororesin include various polymers such as a polymer of tetrafluoroethylene or vinylidene fluoride or a copolymer of these monomers and other monomers, and are generally referred to as fluororesins. If so, you can choose anything. For example, polytetrafluoroethylene or tetrafluoroethylene-
It is preferable to use a hexafluoropropylene copolymer or the like.

The present invention is characterized in that the above two types of resin components (A) and (B) are used in combination, and by using these in combination, there are various problems existing on the surface of wallpaper. In particular, the surface antifouling effect has been particularly improved. Here, the mixing ratio of the two components (A) and (B), which is considered to be optimal for exhibiting this excellent effect, is as follows: (B) 0.01 to 300 parts by weight with respect to (A) 100 parts by weight. ,
Preferably it is 0.1 to 100 parts by weight.

Next, the surface modifier for wallpaper of the present invention includes, in addition to the above two components, those containing (C) silicon dioxide and / or a crosslinking agent as a third component.

By adding silicon dioxide, in addition to the above-mentioned advantages, the surface of the wallpaper can be made in a matte state, and a wallpaper with an extremely beautiful appearance can be provided.

The silicon dioxide is used in an amount of 0.01 to 50 parts by weight, preferably 0.1 to 100 parts by weight of the total of the two components (A) and (B).
Addition of up to 20 parts by weight can usually provide a sufficient matting effect.

Further, by adding a cross-linking agent, it is possible to obtain one having excellent water resistance, solvent resistance, friction resistance and the like.

As the crosslinking agent, for example, a blocked isocyanate compound or the like is preferably used.

The blocked isocyanate compound is a compound having a structure in which an isocyanate group of a polyisocyanate compound is masked with a blocking agent.

As the blocked isocyanate compound,
Examples of the polyisocyanate compound include hexamethylene diisocyanate, tolylene diisocyanate, and adducts thereof such as trimethylolpropane, and the blocking agent includes methyl ethyl ketone oxime and isopropanol.

In this case, the component (A) includes an amino group, an imino group, a hydroxyl group,
It is preferable to use those containing a functional group having an active hydrogen such as a thiol group, a carboxyl group, or an acid amide group.
For example, an acrylate copolymer containing a monomer such as (meth) acrylic acid as a copolymer component, a partially saponified ethylene-vinyl acetate copolymer, a urethane or polyester resin having a polyol residue, Acid-modified or amino acid-modified synthetic rubbers and the like can be mentioned.

Further, the surface modifier for wallpaper of the present invention may contain, if desired, various known additives in addition to the above-mentioned components.

Examples of these additives include various thermosetting resins, ultraviolet absorbers, antioxidants, light stabilizers, extender pigments, general dyes, fluorescent dyes, luminous pigments, pearl pigments, and thermochromic. Agent, photochromic agent, electrochromic agent, liquid crystal, ultraviolet light emitting dye, gold powder, silver powder, glass powder, antifoaming agent, flame retardant, flame retardant, water repellent, surfactant, plasticizer, viscosity modifier, drying Regulator, PH regulator,
Dispersion stabilizer, antibacterial agent, fungicide, insect repellent, repellent, deodorant, deodorant, adsorbent, fragrance, preservatives and the like,
It is not limited to only these.

The surface modifier of the present invention can be dissolved or dispersed in a solvent and applied.

In this case, the solvent may be alcohol,
In addition to various organic solvents such as ester type, ether thread, ketone type, amide type, benzene type, etc., water and the like can also be mentioned, and these can be used alone or in appropriate combination of two or more types. it can.

By adjusting the amount of the solvent used, coating suitability such as viscosity can be appropriately adjusted. Generally, 50 to 3000 parts by weight, preferably 100 to 1000 parts by weight, is sufficient for 100 parts by weight of the component (A).

The wallpaper targeted by the present invention includes not only PVC foamed wallpaper and water-based foamed wallpaper, but also other types of wallpaper, ceiling materials or flooring materials, as well as cosmetics for furniture and interior goods. Needless to say, materials, vehicle interior materials, etc. are also included.

The surface modifier for wallpaper of the present invention can be formed on the wallpaper surface by any conventionally known coating method. The coating may be a single-layer coating or a multilayer coating. There may be.

As the coating method, for example, a gravure method,
Various methods such as a flat screen method, a rotary screen method, a knife coat method, an air knife coat method, a reverse coat method, a roll coat method, a bar coat method, and a spray coat method are applied and are not limited at all.

When the object is foamed wallpaper, the coating can be performed at any stage regardless of before or after the foamed layer foams (expands in volume), and is embossed. In this case, coating can be performed at any stage before and after the processing. Incidentally, the coating amount is usually 1-3
00 g / m ² , preferably 5 to 100 g / m ² .

Then, after the coating, a preliminary drying step is performed, or a direct heat treatment is performed without passing through a preliminary drying step so that the surface modifier of the present invention has better surface characteristics. You can get Natsu wallpaper.

[0053]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail by way of examples, but the present invention is not limited to these examples.

In the following, “parts” and “%” indicate “parts by weight” and “% by weight” unless otherwise specified.

[0055]

Example 1 A PVC foamed wallpaper provided with a foamed layer mainly composed of PVC plastisol and a foaming agent and a graphic layer made of gravure ink on flame-retardant paper, was prepared as a component (A) having a softening point of 70 ° C. 30 parts of an acrylic resin (methacrylic acid-methyl methacrylate copolymer), 1 part of polydimethylsiloxane as a silicone resin of the component (B), and 69 parts of methyl ethyl ketone as a solvent. The whole surface was coated using a gravure plate having a depth of 35 μm. Subsequently, most of the solvent is volatilized by preliminary drying at room temperature, and then a heating treatment is performed at 200 ° C. for 40 seconds to foam the foamed layer and to modify the surface of the foamed layer by the modifier. Layer was formed. afterwards,
By applying embossing, a PVC foam wallpaper having a modified surface was obtained.

The obtained wallpaper had no surface tackiness at all, had very good surface antifouling properties, and also had an excellent touch.

[0057]

Comparative Example 1 A foamed PVC wallpaper was obtained in the same manner as in Example 1, except that the component (B) was not used.

The obtained wallpaper had little surface tackiness, but was inferior to that of Example 1 in antifouling properties. That is, when a few drops of the source were dropped on the surface of the wallpaper and left for 10 minutes and wiped off with a wet cloth, the one of Example 1 could be wiped cleanly, whereas the one of this comparative example had no trace of the source. The remaining.

[0059]

Comparative Example 2 In Example 1, except that 30 parts of a methacrylic resin having a softening point of 30 ° C. was used as the component (A) instead of 30 parts of a methacrylic resin having a softening point of 70 ° C. In all other respects, a PVC foamed wallpaper was obtained.

The obtained wallpaper has surface tackiness (tack feeling).
In addition to having a bad touch feeling, dust and the like easily adhered and were extremely dirty.

In the above, the softening point is 40 ° C.
In the case of using 45 ° C, as the softening point becomes higher, the surface tackiness and the degree of contamination gradually decrease, and in the case of using 50 ° C, those phenomena are almost eliminated. Was done.

From the above results, it can be seen that the definition of the softening point (50 ° C. or higher) of the component (A) of the present invention has a special significance.

[0063]

Example 2 A foamed PVC wallpaper was obtained in the same manner as in Example 1, except that a surface modifier for wallpaper to which 3 parts of silicon dioxide was further added as a component (C) was used.

The obtained wallpaper had, in addition to the favorable effects of the wallpaper of Example 1, the matte degree of the surface increased, and had an extremely excellent appearance.

From the above results, it can be seen that the surface of the wallpaper was given a matting effect by the silicon dioxide as the component (C), in addition to the surface non-adhesiveness and surface antifouling property.

[0066]

Example 3 A softening point as a component (A) is 80 ° C. on the surface of an aqueous foamed wallpaper in which a foamed layer mainly composed of an aqueous emulsion and a foaming agent and a graphic layer made of an aqueous gravure ink are provided on flame-retardant paper. 26 parts of urethane resin (pentaerythritol polycondensate of hexamethylene diisocyanate),
(B) 2 parts of polytetrafluoroethylene as a fluorine resin, 70 parts of a mixed solvent of isopropyl alcohol / xylene (50/50) as a solvent, and a blocked isocyanate compound (methyl ethyl ketone oxime blocked tolylene The surface modifier for wallpaper of the present invention consisting of 2 parts of isocyanate trimethylol propane adduct) was applied to the entire surface by a rotary screen so as to have a weight of 50 g / m ² .

Subsequently, the mixed solvent is sufficiently volatilized by preliminary drying at room temperature, and then subjected to a heat treatment at 180 ° C. for 30 seconds to foam the foamed layer, and the surface of the foamed layer is coated with the modifier. A surface modified layer was formed. Thereafter, an embossing process was performed to obtain an aqueous foamed wallpaper whose surface was modified.

The obtained wallpaper had no surface tackiness at all, had extremely excellent surface antifouling properties, and also had an excellent touch. In addition, water resistance, solvent resistance,
Excellent in chemical / physical fastness such as rub resistance.

From the above results, it can be seen that the cross-linking agent (block isocyanate compound) as the component (C) has chemical / physical properties such as water resistance, solvent resistance, and friction resistance, in addition to the surface non-adhesion and surface antifouling properties. It can be seen that the robustness was further improved.

[0070]

Example 4 On the same aqueous foamed wallpaper surface as in Example 3,
20 parts of a polyolefin resin (ethylene-vinyl acetate copolymer) emulsion having a softening point of 60 ° C. (resin solid content: 45%) as the component (A), and tetrafluoroethylene-hexafluoropropylene as the fluorine resin of the component (B) Using a gravure plate, the surface modifier for wallpaper of the present invention comprising 20 parts of a copolymer emulsion (resin solid content 30%), 45 parts of water and 10 parts of methanol as a solvent and 5 parts of carboxymethyl cellulose as a thickener is used. Coated.

Subsequently, the dispersion medium is sufficiently volatilized by pre-drying at 120 ° C. for one minute, and then subjected to a heat treatment at 180 ° C. for 30 seconds to foam the foamed layer.
A surface-modified layer was formed on the surface by the modifier. Thereafter, an embossing process was performed to obtain an aqueous foamed wallpaper whose surface was modified.

The obtained wallpaper has no surface tackiness at all, has an extremely excellent surface antifouling property, and has a sufficient open time when applied to a wall surface via an aqueous pressure-sensitive adhesive layer on the backside of the wallpaper. In addition, the problem of opening did not occur.

From the above results, it can be seen that in the present invention, the problem of the open time and the aperture does not occur even with the aqueous foamed wallpaper.

[0074]

【The invention's effect】

1. Wallpaper having the surface modifier for wallpaper of the present invention applied on the surface has excellent characteristics in the following points.

A) Surface non-adhesiveness b) Surface antifouling property c) Surface matting property d) Water resistance, solvent resistance, and friction resistance e) Improvement of open time and aperture problems 2. As described above In the present invention, compared to the conventional film laminating means, despite the adoption of extremely simple processing means of processing, various disadvantages caused by the film laminating processing do not occur at all,
Although it has become possible to obtain extremely high-performance wallpapers, this is a completely unexpected result and has great economical advantages.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI C09D 133/00 C09D 133/00 175/04 175/04 183/04 183/04 D21H 19/36 B05D 7/24 302Y 27/20 302L // B05D 7/24 302 D21H 1/22 Z 5/00 A

Claims (5)

[Claims] 1. A wallpaper surface modifier comprising (A) a synthetic resin having a softening point of 50 ° C. or higher and (B) at least one of two components selected from a silicone resin and a fluororesin. 2. An essential component comprising (A) a synthetic resin having a softening point of 50 ° C. or higher, (B) at least one selected from a silicone resin or a fluororesin, and (C) silicon dioxide and / or a crosslinking agent. Surface modifier for wallpaper. 3. The surface modifier for wallpaper according to claim 1, wherein the synthetic resin (A) is a (meth) acrylic resin, a urethane resin or a polyolefin resin. 4. The wallpaper surface modifier according to claim 2, wherein (C) the crosslinking agent is a blocked isocyanate compound. 5. Wallpaper obtained by applying the surface modifier according to claim 1, 2, 3, or 4 on the surface.