JP2512003B2 - Waterproof makeup sheet for building wall exterior - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention is suitable for providing a waterproof layer by performing adhesive bonding or the like on the outer wall surface of a building, particularly on the surface of a porous noncombustible exterior material substrate. The present invention relates to a waterproof decorative sheet for exterior having excellent weather resistance and stain resistance in which a specific top coat coating layer is laminated as an outermost surface layer on a decorative layer.

<Prior Art> An acrylic emulsion is used because the outer wall surface made of a non-combustible porous material such as lightweight concrete has the advantage of being lightweight despite having the drawback of poor waterproofness. It is widely used while supplementing the waterproof property by a method such as applying the above to the outer surface. In particular, in recent years, lightweight concrete has shown remarkable growth in demand due to standardization by precast concrete method and mass production in combination with heat insulating property, lightweight property, and toughness.

A measure for imparting waterproofness to an outer wall formed of a porous outer wall material, such as application of an acrylic emulsion paint, is usually performed after forming the outer wall by post-processing. Therefore, there is a problem that the application requires curing and that the paint mist causes pollution, for example. Furthermore, because of the fact that scaffolding is used during painting work, so-called uneven scaffolding causes uneven coating, which not only causes aesthetic problems, but also causes a problem in waterproofness due to light and shade in the coating film. It was

As a result of various studies for imparting waterproofness to such a porous outer wall surface, the present inventors first applied a waterproof coating to the surface of the fibrous substance and formed a waterproof layer by infiltration, A waterproof decorative sheet having a resin coating on the surface of the waterproof layer (Japanese Patent Laid-Open No. 61-151351) was proposed, and a waterproofing method using the same was also proposed.

<Problems to be Solved by the Invention> However, also in the waterproof decorative sheet proposed by the present inventors, the impregnation of the fibrous member with the waterproof coating material in forming the waterproof layer is Depending on the characteristics, it may not be performed uniformly and effectively, and the waterproof effect may be partially incomplete. Not only this, but when this waterproof decorative sheet is used by adhering it to the outer wall surface made of porous outer wall material such as lightweight cellular concrete board (ALC board) with an adhesive, depending on the characteristics of the fibrous member, Not only is there a problem that delamination occurs between the decorative sheet and the adhesive layer and the waterproof effect cannot be fully achieved, but also the problem that weather resistance and stain resistance are insufficient should be solved. There was a point.

Therefore, the outer wall surface made of a porous wall material such as highly useful lightweight concrete, by applying in advance or on-site, to give waterproof without practical problems, and weather resistance, It has been desired to develop a new waterproof decorative sheet which is excellent in stain resistance and overcomes the above-mentioned technical drawbacks and which is used for imparting waterproofness, weather resistance and stain resistance.

<Means for Solving Problems> In order to solve the above problems, the present invention employs the following configurations.

That is, the waterproof decorative sheet for exterior building exterior of the present invention is a fibrous sheet member (1) on the back side, a decorative layer (3) on the front side, and a topcoat coating film on the outside thereof, which are attached to the exterior wall surface of the building. A layer (9) and a waterproof layer (2) intermediate the fibrous sheet member (1) and the decorative layer (3), and a part of the waterproof layer (2) is coated with a waterproof paint. (1)
A waterproof coating material impregnated portion (4) is formed by impregnating with the above, and the top coat coating film layer (9) is formed of a solvent-based coating material of a curable fluororesin type or acrylic silicone resin type. The waterproof coating material impregnated portion (4) referred to herein is obtained by the present invention by forming a waterproof coating material, for example, a non-infiltrated portion (8) of a water-based elastic coating material on a part of the fibrous sheet member (1). The effect obtained can be made more preferable.

The fibrous sheet member (1) referred to in the present invention is a sheet-like material obtained from inorganic fibers such as glass fibers, vinylon fibers, acrylic fibers, polyester fibers, organic fibers such as acetate fibers as constituent materials, For example, a sheet-like material obtained in the form of a nonwoven fabric is more preferably used because it can be obtained at a low cost.

Any of these sheet-like materials may be used as long as it does not hinder the strength of the waterproof decorative sheet and has characteristics such as basis weight and air permeability so that the water-based paint can be easily impregnated. From the viewpoint of its strength, ease of impregnation, etc., the basis weight is 10 to 100 g.
/ m ² is preferable, and particularly 40 to 60 g / m ² is more preferable. Further, the air permeability of 1 second or less is also a condition preferably used.

The waterproof coating for forming the waterproof layer (2) used in the present invention is preferably a water-based elastic coating, and the emulsion used for this is an emulsion used in a region where the amount of resin components is relatively large, and the coating has elasticity. It is preferably used as long as it has waterproofness, and examples thereof include acrylic emulsion, acrylic / styrene emulsion, acrylic / vinyl acetate emulsion, ethylene / vinyl acetate emulsion, and Veova / vinyl acetate emulsion. Among them, acrylic emulsion is more preferably used.

The waterproof coating is prepared by blending an inorganic pigment such as titanium oxide or calcium carbonate or / and a filler in these emulsions, and usually has a viscosity of, for example, 30,00 to 10,000 cps.
It is obtained by adjusting to the area of (centipoise).

As an emulsion for a decorative paint used for forming the decorative layer (3) of the present invention, it is necessary to add a paint having no tackiness, elasticity, and antifouling property from the viewpoint of storability and workability. The emulsion for the waterproof layer (2) is used, although the mixing ratio of the filler and the like is different. In particular, an emulsion having a relatively high hardness such as styrene or an acrylic emulsion, to which a plasticizer that volatilizes after application and reduces the remaining amount is added is more preferably used. The viscosity of this cosmetic coating is usually, for example, 3,500 to 10,000 cp.
adjusted to s.

Decorative layer of sheet-like material having the above surface cosmetic properties (3)
The coating material for forming the topcoat coating film layer (9) laminated on the surface of the decorative layer (3) in order to protect the surface of the product, impart stain resistance, and improve weather resistance, is a curable fluorine. A resin-based or acrylic silicone resin-based solvent-based paint is preferably used, and the exterior waterproof decorative sheet excellent in weather resistance and stain resistance of the present invention can be obtained only by top-coating the paint on the decorative layer (3). can get.

Examples of the curable fluororesin solvent-based paint include Lumiflon (trade name; LUMIFLON, solvent-soluble, room-temperature-curable fluororesin for resin) manufactured by Asahi Glass. The solvent is a xylene-based solvent, the solid content is 50 to 60% by weight, and the viscosity is usually
It is 4,000 to 5,000 cps. And is a one-pack type or two-pack type curable coating having a hydroxyl group (-OH) as a reactive group in the molecule and using isocyanate, melamine or blocked isocyanate as a curing agent. Usually, when melamine is used as a curing agent, Lumiflon varnish 10
About 3 parts by weight of the curing agent per 0 parts by weight, or 9 parts by weight of 100 parts by weight of the varnish in the case of the isocyanate type curing agent.
It is preferable to use about 10 parts by weight. The former is used as a one-pack type, and the latter is used as a two-pack type paint. In the case of the former, the curing conditions are, for example, 140 ° C. for 30 minutes,
In the latter case, it is, for example, 25 ° C. for 3 days or 80 ° C. for 60 minutes. Furthermore, as a basic weather-resistant fluororesin paint made from Asahi Glass' Lumiflon as a basic paint component resin, Bontile made by Bontile Co., Ltd. There is Lactone Fluoro (trade name) manufactured by Paint Co., Ltd., and any of them can be preferably used. All of these are curable paints, and the curing conditions are:
Minutes to 30 minutes, 5 hours at 20 ° C or 2 hours at 120 ° C
0 minutes, 20 hours at 20 ℃ with lactone fluorine or 20-30 at 130 ℃
Minutes.

In obtaining the waterproof decorative sheet according to the present invention, as a coating material other than the above for forming the topcoat coating layer, which is preferably used by being able to enjoy the effects of the present invention as a topcoat layer, an acrylic silicone resin-based coating is used. There is solvent-based paint.
For example, Kaneka Gem Rack (KANEKA G
EMLAC product name) is available. This is a siloxane cross-linking type reactive polymer having an alkoxysilyl group bonded to the main chain, which reacts with a small amount of moisture in the air and cures, and has good weather resistance and stain resistance. In this case, the effect of the present invention can be obtained.

It is possible to obtain an exterior decorative sheet having excellent weather resistance and stain resistance, which can remarkably enjoy the effects of the present invention for the first time using a solvent-type coating material of the above-mentioned curable fluororesin type or acrylic silicone resin type, When other resin-based solvent-based paints or non-solvent-based paints are used, it is difficult to obtain the remarkable effects of the present invention.

A solvent-type paint obtained by mixing the above-mentioned curable fluororesin-based or acrylic silicone resin-based solvent-based paint with a metal powder such as aluminum powder, copper powder, and stainless powder is laminated on the decorative layer (3) to form a metal-powder metallic. When a coating layer is formed and is used as the top coat coating layer, the waterproof waterproof seal for exterior is obtained which has a decorative effect in addition to weather resistance and stain resistance. , More preferred. In addition, a solvent-type paint obtained by mixing a curable fluororesin-based or acrylic silicone resin-based solvent-type paint with a pearl pigment such as mica powder is laminated on the decorative layer (3) to form a mineral powder-containing coating layer, When this is used as the topcoat coating film layer, as in the case of forming the metal powder-based metallic coating film layer described above, stain resistance, weather resistance, and designability can be imparted to provide a decorative effect as well. Is more suitable.

When the top coat layer (9) is a metallic powder metallic coating layer as described above, some of the metallic powder present on the coating surface has a thin coating layer on the surface of the powder, and air for a long period of time. Discoloration may be observed due to oxidation, etc., and from the viewpoint of eliminating the possibility of discoloration, a curable fluororesin-based or acryl-silicone resin-based solvent type that does not contain metal powder on the metal powder metallic coating layer. It is more preferable to further laminate a coating film formed of a paint.

In obtaining the waterproof decorative sheet for exterior of the present invention, as shown in FIG. 1, a waterproof layer (2) is formed on the surface of a fibrous sheet member (1) having suitable basis weight, air permeability and the like. The above-mentioned water-based elastic paint for coating is applied, and the cross section of the sheet member is impregnated to form an impregnated portion (4), and then the makeup aqueous layer paint is applied to one surface of the sheet member to form the decorative layer (3). Good to stack. In this case, it is necessary to carry out coating and impregnation of the fibrous sheet member so that the uninfiltrated portion (8) of the waterproof coating is present on one surface or inside the vicinity of the surface of the fibrous sheet member. This is preferable because it can be prevented.

A method using a roll coater, a sprayer, a flow coater, a doctor knife or the like is preferably used as a method for applying and forming a decorative layer and a method for forming a topcoat coating film layer.

The sheet material having surface cosmetic properties referred to in the present invention refers to a sheet material having a flat pattern, an uneven pattern, and a multicolored pattern on the surface of the decorative layer (3). Specific examples of the uneven pattern include Yuzu skin pattern, enamel pattern, ball blowing pattern,
There are stucco patterns and crater patterns.

As shown in FIG. 2, the exterior waterproof decorative sheet of the present invention is a porous wall material such as a lightweight concrete board (ALC board).
The adhesive layer (6) is attached to the outer wall surface base (7) constituted by the above. At that time, from the viewpoint of preventing delamination between the adhesive layer (6) and the waterproof decorative sheet, one surface of the decorative sheet is not impregnated with the aqueous elastic paint as described above,
The present invention is made more useful by allowing the sheet member to have the waterproof paint non-infiltrated portion (8) so that the adhesive can permeate and impregnate the surface of the decorative sheet or the inside of the vicinity of the surface. On this surface or in the vicinity of the surface, the waterproof coating uninfiltrated portion (8) of FIG. 1 forms an adhesive impregnated portion (5) by the infiltration of the adhesive, and the adhesive binds the fibers as shown in FIG. As a result of becoming a part of the adhesive layer (6), the delamination phenomenon can be prevented more reliably.

Further, as mentioned above, when the fibrous sheet member is impregnated with this paint so that the uninfiltrated portion (8) of the waterproof paint exists on one surface or inside the vicinity of the surface, this paint having tackiness does not reach the surface. Therefore, it is possible to avoid the adhesiveness of the surface from hindering the operation during the operation of winding the weather resistant and stain resistant exterior waterproof decorative sheet product of the present invention, and it is also very suitable for storage.

<Operation and Effect of Invention> Since the present invention is the waterproof decorative sheet for building wall exterior having the above-described structure, the waterproof effect is partially incomplete due to the uniform impregnation of the fibrous material with the waterproof paint. Such a defective portion does not occur, and by making a part of the member an uninfiltrated portion (8) of the waterproof coating, the adhesive layer and the decorative sheet can be well adhered, and the above-mentioned more surely. Such peeling is prevented. In this aspect, a part of the adhesive is impregnated into the waterproof paint non-infiltrated portion (8) of the fibrous sheet member (1) and becomes a part of the adhesive layer to further prevent delamination from occurring. .

Further, the waterproof decorative sheet for exterior building wall of the present invention is superior to the top coat coating layer composed of the curable fluororesin-based or acrylic silicone resin-based solvent-based paint laminated on the decorative layer as the outermost layer. It is also provided with weather resistance and stain resistance.

<Examples> Specific materials and manufacturing methods for the exterior waterproof decorative sheet of the present invention will be described in detail below with reference to Examples. However, the present invention is not limited to these examples. In addition, the parts are shown on a weight basis. A graph wool non-woven fabric having a basis weight of 50 g / m ² and an air permeability of 0.5 seconds and a thickness of 0.07 mm was used as the fibrous sheet member (1). A waterproof coating material having the following mixing ratio was applied onto one surface using a roll coater to form a waterproof layer (2), and a part of the coating material was impregnated into the nonwoven fabric to form a waterproof coating material impregnated portion (4).

Acrylic resin emulsion 100 parts Titanium oxide 10 parts Calcium carbonate 90 parts Pigment 0.8 parts Surfactant 0.2 parts Viscosity 3,000 to 4,000 cps. When applying and impregnating, the surface of the nonwoven fabric should not reach the impregnated part of the water-based elastic paint. Then, the non-infiltrated portion (8) of the waterproof paint was formed. Then in the hot air dryer 11
It was dried for 3 minutes using hot air at 5 ° C.

After that, a cosmetic coating composition having the following blending ratio was applied on the dry coated surface using a roll coater, and then dried in a hot air dryer at 115 ° C. for 3 minutes to form a cosmetic layer (3).

Styrene / acrylic resin emulsion 100 parts Titanium oxide 10 parts Calcium carbonate 50 parts Pigment 0.8 parts Surfactant 0.2 parts Plasticizer 8 parts Viscosity 3,500 to 4,500 cps. The obtained decorative layer (3) is embossed and the surface has an uneven pattern. A cosmetic layer with a beautiful texture is formed, and Bontile (BONFLON) # 5000 manufactured by Bontile Co., Ltd. is formed on the surface.
Clear (main agent / hardening agent 3/1 weight ratio) was applied using a roll coater and cured at 120 ° C. for 30 minutes.
The thickness of this topcoat coating film layer (9) was about 25 μm.

The obtained waterproof decorative sheet for exterior as shown in FIG. 1 has extremely excellent weather resistance and stain resistance.
S A6910 5.10 (Permeability test), 5.12 (Weather resistance test), 5.
Passed each test of 13 (elongation test).

Next, the backside of the exterior waterproof decorative sheet obtained in this example was uniformly coated with a roll coater to impregnate 300 g / m ² of the following compounding ratio on the back surface, and then impregnated with the precast concrete board as an outer wall surface base (7). (PC board), temperature 20
It was dried for 14 days under conditions of ℃ and humidity of 65%.

Acryle emulsion 100 parts Calcium carbonate 100 parts Thickener 0.3 Viscosity 6,000 cps. As shown in Fig. 2, the PC board with the exterior waterproof decorative sheet was impregnated with the adhesive in the unwetted part (8). The resulting adhesive-impregnated portion (5) was excellent in that it did not cause delamination during actual use. The PC board in which this exterior waterproof decorative sheet was combined was extremely excellent in weather resistance and stain resistance. In addition, it is possible to easily wipe off the adhered pollution after a relatively long period of use.

[Brief description of drawings]

FIG. 1 is a sectional view of an exterior waterproof decorative sheet according to the present invention, and FIG. 2 is a sectional view of the same at the time of bonding. (1) fibrous sheet member, (2) waterproof layer, (3) decorative layer, (4) waterproof paint impregnated portion, (5) adhesive impregnated portion, (6) adhesive layer (7) outer wall surface, (8) waterproof Unpainted part (9) Topcoat coating layer

Claims (5)

(57) [Claims] 1. A fibrous sheet member (1) on the back side, a decorative layer (3) on the front side, a top coat coating layer (9) on the outer side, which is attached to the outer wall surface of a building, and the fibrous material. A waterproof layer composed of a waterproof layer (2) intermediate between the sheet member (1) and the decorative layer (3), wherein a part of the waterproof layer (2) impregnates the fibrous sheet member (1) with a waterproof paint. A waterproof decorative sheet for exterior walls of a building, wherein a paint impregnated portion (4) is formed, and the top coat coating film layer (9) is formed of a curable fluororesin-based or acrylic silicone resin-based solvent-based paint. 2. When the waterproof paint impregnated portion (4) is formed on a part of the fibrous sheet member (1) leaving the waterproof paint non-infiltrated portion (8), and is adhered to the outer wall surface (7) of the building. The waterproof coating uninfiltrated portion (8) is impregnated with an adhesive to the adhesive impregnated portion (5)
The waterproof decorative sheet for building wall exterior according to claim 1, wherein the waterproof decorative sheet forms a part of the adhesive layer (6). 3. The top coat coating layer (9) is formed by a coating material in which a metal powder is mixed with a curable fluororesin-based or acrylic silicone resin-based solvent-based coating material. Waterproof decorative sheet for exterior walls of buildings. 4. The topcoat coating film layer (9) is formed of a coating material in which a mineral powder is blended with a curable fluororesin-based or acrylic silicone resin-based solvent-based coating material. Waterproof decorative sheet for building exterior walls. 5. A coating layer in which the topcoat coating layer (9) is formed of a curable fluororesin-based or acrylic silicone resin-based solvent-based coating, and a coating prepared by mixing the solvent-based coating with metal powder. 2. The waterproof decorative sheet for building wall exterior according to claim 1, which is a composite top coat coating layer in which the coating layer formed in step 1) is laminated, and the former is an outer layer.