JP2009263581A - Aqueous resin emulsion composition, expanded decorative material and its producing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an aqueous resin emulsion composition which has satisfactory expandability and from which an expanded decorative material excellent in cracking resistance and antiblocking properties can be obtained. <P>SOLUTION: The aqueous resin emulsion composition includes an aqueous resin emulsion (A), a thermally-expandable microcapsule foaming agent (B) and an inorganic filler (C). The aqueous resin emulsion (A) includes a core/shell-structured resin composed of a core part containing an ethylene-vinyl acetate copolymer (A11) and an (meth)acrylic ester polymer (A12) and a shell part containing an (meth)acrylic ester polymer (A2). The content of the thermally-expandable microcapsule foaming agent (B) is 2-30 pts.mass based on 100 pts.mass solid content of the aqueous resin emulsion (A), and that of the inorganic filler (C) is 20-200 pts.mass based on 100 pts.mass solid content of the aqueous resin emulsion (A). <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a novel aqueous resin emulsion composition, a foamed cosmetic material and a method for producing the same.

For the purpose of enhancing the design of the wall surface, a foamed decorative material such as foam wallpaper may be attached to the wall surface. Conventionally, a resin composition mainly composed of polyvinyl chloride has been mainly used as a material for foamed decorative materials, particularly foamed wallpaper. However, wallpaper using polyvinyl chloride is dioxin, hydrogen chloride, etc. during incineration. Therefore, an alternative material is required.
Thus, as an alternative to polyvinyl chloride wallpaper, a wallpaper using an ethylene-vinyl acetate copolymer, an acrylic resin, or the like has been proposed. For example, Patent Document 1 proposes a foamed wallpaper obtained by laminating a resin composition containing an ethylene-vinyl acetate copolymer and a pyrolytic foaming agent on a base material by a T-die extruder and foaming. ing.
However, the foamed wallpaper described in Patent Document 1 tends to curl during construction, and the workability may be lowered.
In Patent Document 2, a composition containing an aqueous resin emulsion containing an ethylene-vinyl acetate copolymer and an acrylic resin and a thermally expandable microcapsule foaming agent is applied onto a substrate, dried, and foamed. The foamed wallpaper obtained in this way has been proposed. Since this foamed wallpaper is formed by coating, curling is unlikely to occur.
JP 2006-306054 A Japanese Patent Laid-Open No. 6-47875

However, the foamed wallpaper described in Patent Document 2 has a problem of low crack resistance and blocking resistance.
In addition, foamed decorative materials are required to have a foamed resin layer having a sufficient foaming ratio, but those having a foamed resin layer having a sufficient foaming ratio while ensuring crack resistance and blocking resistance are known. There wasn't.
The present invention is intended to solve the above-mentioned problems, and obtains a foamed cosmetic material that can be used as a substitute material for polyvinyl chloride, has sufficient foamability, and is excellent in crack resistance and blocking resistance. An object of the present invention is to provide an aqueous resin emulsion composition that can be used. Another object of the present invention is to provide a foamed decorative material having a foamed resin layer having a sufficient expansion ratio and excellent in crack resistance and blocking resistance, and a method for producing the same.

The present invention includes the following aspects.
[1] An aqueous resin emulsion composition containing an aqueous resin emulsion (A), a thermally expandable microcapsule foaming agent (B), and an inorganic filler (C),
The aqueous resin emulsion (A) has a core portion containing an ethylene-vinyl acetate copolymer (A11) and a (meth) acrylic acid ester polymer (A12), and a shell containing a (meth) acrylic acid ester polymer (A2) Containing a core-shell structure resin consisting of
The content of the thermally expandable microcapsule foaming agent (B) is 2 to 30 parts by mass with respect to 100 parts by mass of the solid content of the aqueous resin emulsion (A).
Content of an inorganic filler (C) is 20-200 mass parts with respect to 100 mass parts of solid content of an aqueous resin emulsion (A), The aqueous resin emulsion composition characterized by the above-mentioned.
[2] The core-shell structure resin contained in the aqueous resin emulsion (A) includes the total amount of the ethylene-vinyl acetate copolymer (A11) and the (meth) acrylic acid ester polymer (A12) contained in the core part, and the shell The aqueous resin emulsion composition according to [1], wherein a mass ratio with respect to the (meth) acrylic acid ester polymer (A2) contained in the part is 95/5 to 50/50.
[3] The core portion of the core-shell structure resin contained in the aqueous resin emulsion (A) has a mass ratio of 99/1 of the ethylene-vinyl acetate copolymer (A11) and the (meth) acrylic acid ester polymer (A12). The aqueous resin emulsion composition according to [1] or [2], which is ˜80 / 20.
[4] A substrate and a foamed resin layer provided on at least one side of the substrate, and the foamed resin layer is coated with the aqueous resin emulsion composition according to any one of [1] to [3] A foamed decorative material, which is a layer formed by heating and heating.
[5] The foamed decorative material according to [4], which is used as wallpaper.
[6] Applying the aqueous resin emulsion composition according to any one of [1] to [3] to at least one surface of a substrate to form an unfoamed layer, and heating the unfoamed layer to foam A method for producing a foamed decorative material.

The aqueous resin emulsion composition of the present invention can be used as a substitute material for polyvinyl chloride, and can provide a foamed cosmetic material having sufficient foamability and excellent crack resistance and blocking resistance. is there.
The foamed decorative material of the present invention has a foamed resin layer having a sufficient foaming ratio, and is excellent in crack resistance and blocking resistance.
According to the method for producing a foamed decorative material of the present invention, it is possible to easily produce a foamed decorative material having a foamed resin layer having a sufficient expansion ratio and excellent in crack resistance and blocking resistance.

<Aqueous resin emulsion composition>
The aqueous resin emulsion composition of the present invention contains an aqueous resin emulsion (A), a thermally expandable microcapsule foaming agent (B), and an inorganic filler (C).

  The aqueous resin emulsion (A) includes a core portion containing an ethylene-vinyl acetate copolymer (A11) and a (meth) acrylic acid ester polymer (A12), and a shell containing a (meth) acrylic acid ester polymer (A2). And an emulsion containing a core-shell structure resin.

The ethylene-vinyl acetate copolymer (A11) contained in the core part preferably has an ethylene unit content of 10 to 50% by mass, and more preferably 15 to 40% by mass. If the ethylene unit content in the ethylene-vinyl acetate copolymer (A11) is 10% by mass or more, the foaming property and crack resistance are higher, and if it is 50% by mass or less, the blocking resistance is higher. Become.
Moreover, ethylene-vinyl acetate copolymer may be used individually by 1 type, and may use 2 or more types different together.

Examples of the (meth) acrylic acid ester unit constituting the (meth) acrylic acid ester polymer (A12) contained in the core part include, for example, methyl acrylate, ethyl acrylate, propyl acrylate, butyl acrylate, acrylic acid 2 -Ethylhexyl, methyl methacrylate, ethyl methacrylate, propyl methacrylate, butyl methacrylate and the like.
These (meth) acrylic acid esters may be used alone or in combination of two or more.

  The glass transition temperature of the (meth) acrylic acid ester polymer (A12) is preferably -40 ° C to + 20 ° C, more preferably -20 ° C to 0 ° C. If the glass transition temperature of the (meth) acrylic acid ester polymer (A12) is −40 ° C. or higher, the blocking resistance is higher, and if it is + 20 ° C. or lower, the crack resistance is higher.

  In the core part, the mass ratio [(A11) / (A12)] of the ethylene-vinyl acetate copolymer (A11) and the (meth) acrylic acid ester polymer (A12) is 99/1 to 80/20, Preferably it is 98/2-90/10. When the mass ratio of the (meth) acrylic acid ester polymer (A12) in the core part is less than 1% by mass, the crack resistance tends to be lowered, and when it is more than 20% by mass, the blocking resistance tends to be lowered. is there.

The (meth) acrylic acid ester polymer (A2) contained in the shell part can be the same as the (meth) acrylic acid ester polymer (A12) contained in the core part.
However, the glass transition temperature of the (meth) acrylic acid ester polymer (A2) contained in the shell part is preferably + 20 ° C. to + 100 ° C., more preferably + 40 ° C. to + 80 ° C. If the glass transition temperature of the (meth) acrylic acid ester polymer (A2) is + 20 ° C. or higher, the tackiness is lowered and the blocking resistance is higher, and if it is + 100 ° C. or lower, the crack resistance is higher. Become.
The glass transition temperature of the (meth) acrylic acid ester polymer (A2) in the shell part is set to + 20 ° C. to + 100 ° C., and the glass transition temperature of the (meth) acrylic acid ester polymer (A12) in the core part is −40 ° C. When the temperature is set to ˜ + 20 ° C., the core portion has high elasticity and is excellent in crack resistance, and the shell portion has low tack and is excellent in blocking resistance.

  The total amount of the ethylene-vinyl acetate copolymer (A11) and the (meth) acrylic acid ester polymer (A12) contained in the core part, and the (meth) acrylic acid ester polymer (A2) contained in the shell part The mass ratio [{(A11) + (A12)} / (A2)] is 95/5 to 50/50, preferably 90/10 to 60/40. When the (meth) acrylic acid ester polymer (A2) contained in the shell part is less than 5% by mass, the foamability tends to be reduced, and when it is more than 50% by mass, the crack resistance tends to be reduced.

The aqueous resin emulsion (A) may be a single type of the above-mentioned core-shell structure resin, or may be a combination of two or more types.
In addition, the aqueous resin emulsion (A) may include an aqueous resin having no core-shell structure (hereinafter referred to as non-core-shell structure resin). Non-core shell structure resins include, for example, vinyl acetate resins, ethylene-vinyl ester copolymers, acrylic resins, ethylene- (meth) acrylic ester copolymers, polyurethane resins, polyester resins, and epoxy resins. Examples thereof include resins, silicone resins, polybutene resins, polybutadiene resins, and styrene-butadiene copolymers.
The non-core-shell structure resin used in combination with the core-shell structure resin is appropriately selected according to the required performance of the composition, such as stability, coatability, processability, foamability, product physical properties of foamed decorative materials, and product design properties. The For example, when emphasizing foamability, it is preferable to use a low molecular weight ethylene-vinyl acetate copolymer in combination as the non-core shell resin. In the case where importance is attached to the mechanical strength of the foamed cosmetic material product, it is preferable to use an ethylene-vinyl acetate copolymer to which a crosslinking agent is added as the non-core shell resin.

The aqueous resin emulsion (A) contains water, which is a dispersion medium for dispersing the resin component, in addition to the resin component such as the core-shell structure resin. From the viewpoint of handleability, the solid content concentration of the aqueous resin emulsion (A) is preferably 40 to 80% by mass, and more preferably 50 to 75% by mass.
Thus, since the aqueous resin emulsion (A) contains a dispersion medium, the aqueous resin emulsion composition is liquid.

The thermally expandable microcapsule foaming agent (B) is a foaming agent composed of microspheres that can be expanded and foamed by heating.
Specific examples of the heat-expandable microcapsule foaming agent (B) include a particle diameter containing low-boiling hydrocarbons such as isobutane and isopentane inside the shell portion made of polyacrylonitrile, a copolymer of acrylonitrile and methyl acrylate, or the like. Examples include spheres of about 1 to 50 μm, preferably about 2 to 30 μm. As a commercially available product of such a thermally expandable microcapsule foaming agent (B), Matsumoto Microsphere (manufactured by Matsumoto Yushi Seiyaku Co., Ltd.) and the like can be mentioned.

  Content of a thermally expansible microcapsule foaming agent (B) is 2-30 mass parts with respect to 100 mass parts of solid content of an aqueous resin emulsion (A), Preferably it is 5-15 mass parts. When the content of the thermally expandable microcapsule foaming agent (B) is less than 2 parts by mass, the foamability tends to be insufficient, and when it is more than 30 parts by mass, the mechanical strength of the resulting foamed resin layer tends to be reduced. It is in.

  Examples of the inorganic filler (C) include aluminum hydroxide, magnesium hydroxide, barium hydroxide, calcium carbonate, magnesium carbonate, calcium sulfate, barium sulfate, ferrous hydroxide, basic zinc carbonate, basic lead carbonate, Examples thereof include silica sand, clay, talc, silicas, titanium dioxide, magnesium silicate and the like. Among these, aluminum hydroxide, magnesium hydroxide, calcium carbonate, and magnesium carbonate are preferable because they are excellent in dispersibility in an aqueous resin emulsion, coating properties on a substrate, printability, and foamability.

  Content of an inorganic filler (C) is 20-200 mass parts with respect to 100 mass parts of solid content of an aqueous resin emulsion (A), Preferably it is 50-150 mass parts. When the content of the inorganic filler (C) is less than 20 parts by mass, the flame retardancy tends to be lowered, and when it is more than 200 parts by mass, the foamability, mechanical strength and crack resistance tend to be lowered.

  The water-based resin emulsion composition of the present invention includes a colorant, a dispersant, an antiblocking agent, an antifoaming agent, a thickening agent, an ultraviolet absorber, a light stabilizer, an antioxidant, a matting agent, and a lubricant as necessary. Various additives such as anti-friction agents, antistatic agents, antibacterial agents, and antifungal agents may be included.

The aqueous resin emulsion composition described above does not contain polyvinyl chloride, but exhibits the same physical properties as polyvinyl chloride, and therefore can be used as an alternative material for polyvinyl chloride.
Moreover, when the aqueous resin emulsion (A) contains the core-shell structure resin, it is possible to obtain a foamed decorative material having sufficient foamability and excellent crack resistance and blocking resistance.

<Foaming cosmetic material>
An embodiment of the foamed decorative material of the present invention will be described.
FIG. 1 shows a foamed decorative material according to this embodiment. The foamed decorative material 10 of this embodiment example is formed by printing a pattern or the like on a base material 11, a foamed resin layer 12 provided on one side of the base material 11, and a part of the surface of the foamed resin layer 12. The printing layer 13 is included.

  As the base material 11, a sheet having moisture permeability and preferably flexibility can be used, and examples thereof include paper, woven fabric, and non-woven fabric. When the foamed decorative material 10 is foamed wallpaper, paper, in particular, so-called wallpaper backing paper is preferably used as the base material 11.

The foamed resin layer 12 is a layer formed by applying the aqueous resin emulsion composition and heating. In the foamed resin layer 12, the thermally expandable microcapsule foaming agent (B) 12b and the inorganic filler (C) 12c are dispersed in the resin component 12a of the aqueous resin emulsion (A). However, in the state of the foamed resin layer 12, the thermally expandable microcapsule foaming agent (B) 12b is filled with vaporized hydrocarbon.
Further, the foamed resin layer 12 in the present embodiment has a dot-shaped uneven pattern 12d formed on the surface in order to improve design properties.

Since the foamed resin layer 12 of the foamed decorative material 10 of this embodiment is formed by applying the aqueous resin emulsion composition and being heated, the foamed resin layer 12 has a sufficient foaming ratio and is also resistant to cracking and resistance. Excellent blocking properties.
This foamed decorative material 10 can be suitably used as wallpaper for decorating the wall surface.

<Method for producing foamed decorative material>
Next, the manufacturing method of the said foaming decorative material 10 is demonstrated.
In the method for producing a foamed decorative material in the present embodiment, first, the aqueous resin emulsion composition is applied to one side of the substrate 11 to form an undried coating film.
As a coating method, for example, a coating method such as a knife coating method, a nozzle coating method, a die coating method, a lip coating method, a comma coating method, a gravure coating method, a rotary screen coating method, or a reverse roll coating method can be applied.
The coating amount of the aqueous resin emulsion composition may be appropriately determined according to the intended use and required characteristics. For example, when using the obtained foaming decorative material 10 as wallpaper, it is preferable to set it as 50-300 g / m < ² > by dry coating amount, and it is more preferable to set it as 100-250 g / m < ² >.

Next, the undried coating film is dried to form an unfoamed layer.
As a drying method, for example, a hot air drying method, an infrared irradiation drying method, a vacuum drying method, or a method in which two or more of these are combined can be applied.
The drying temperature is preferably in a range not exceeding the foaming start temperature of the aqueous resin emulsion composition. Moreover, when an aqueous resin emulsion composition contains an aqueous resin emulsion as a main component, it is preferable to make drying temperature into 90-95 degreeC which does not exceed the boiling point of water.
By drying, the undried coating film may become a gel.

Next, a printed pattern 13 is formed by printing a pattern on the unfoamed layer.
Examples of the printing method include a method of printing using a gravure printing method, an offset printing method, a screen printing method, or the like using water-based ink.

Next, the unfoamed layer is heated and foamed to form the foamed resin layer 12.
As a heating method for foaming the unfoamed layer, a hot air heating method, an infrared heating method, a method using them in combination, or the like can be applied.
The heating temperature and heating time are appropriately selected according to the melt viscosity characteristics of the resin component of the aqueous resin emulsion (A) and the foaming temperature characteristics of the thermally expandable microcapsule foaming agent (B). It is preferable that the temperature is 140 to 200 ° C. and the heating time is 20 to 80 seconds.

Next, a dot-shaped uneven pattern 12 d is formed on the surface of the foamed resin layer 12. As a method for forming the uneven pattern 12d, a mechanical embossing method for pressing an embossed plate on the surface of the foamed resin layer 12 can be applied.
The foamed decorative material 10 is obtained by the above process.

In the present production method in which the foamed resin layer 12 is formed using the aqueous resin emulsion composition, the foamed decorative material 10 can be easily increased in foaming ratio of the foamed resin layer 12 and excellent in crack resistance and blocking resistance. Can be manufactured.
Furthermore, since this manufacturing method forms the foamed resin layer 12 by coating, curling hardly occurs and the workability is excellent.

Note that the present invention is not limited to the above embodiment.
For example, the foamed decorative material of the present invention may be composed of a multilayer having two or more foamed resin layers. When the foamed resin layer is a multilayer, the components may be different in each layer.
Examples of the method for forming the foamed resin layer in the case where the foamed resin layer is composed of two or more multilayers include, for example, a method of coating one layer at a time from the lower layer to the upper layer, and using a multilayer coating apparatus. There is a method in which the layers are simultaneously applied and formed. In the case of coating one layer at a time, it is preferable to coat and form the upper layer in a wet state without drying the lower layer, because each layer is compatible and excellent in interlayer adhesion. However, the upper layer may be formed by coating after the lower layer is dried and solidified.

In the foamed decorative material, the concavo-convex pattern 12d of the foamed resin layer 12 may be a pattern other than a dot shape, for example, a grid pattern, a wavy pattern, or the like. The foamed resin layer 12 may not have the uneven pattern 12d.
Moreover, in the foaming decorative material of this invention, the printing layer 13 does not need to be formed.
Moreover, in the foaming decorative material of this invention, the foamed resin layer may be provided in both surfaces of the base material.

Examples of the present invention and comparative examples are shown below to specifically explain the present invention.
<Examples 1-5, 7, 8 and Comparative Examples 1-5>
Thermally expandable microcapsule foaming agent (manufactured by Matsumoto Yushi Seiyaku Co., Ltd .; F-55) 10 masses per 100 mass parts of the solid content of the aqueous resin emulsion (core-shell structure resin emulsion) containing the core-shell structure resin shown in Table 1 Parts, calcium carbonate (Maruo Calcium Co., Ltd .; Super SSS) 80 parts by mass, titanium oxide (Chuo Rika Kogyo Co., Ltd .; T-76) 15 parts by mass are mixed and dispersed to prepare an aqueous resin emulsion composition. did.
In addition, the core-shell structure resin used in this example is an ethylene-vinyl acetate copolymer (ethylene unit 25% by mass, expressed as “EVA” in the table)) and an acrylic polymer (acrylic acid-2-ethylhexyl polymer, In the table, it is a resin composed of a core portion made of “acryl” and a shell portion made of an acrylic polymer (methyl methacrylate polymer).

The obtained aqueous resin emulsion composition was applied to one side of a paper substrate with a comma coater so that the dry coating amount was 150 g / m ² to form an undried coating film.
Next, the undried coating film was dried with hot air at a drying temperature of 90 ° C. to form an unfoamed layer. Next, the unfoamed layer was passed through a foaming furnace, heated by hot air heating at a heating temperature of 180 ° C. for a heating time of 40 seconds, and foamed to obtain a foamed decorative material.

<Example 6>
An ethylene-vinyl acetate copolymer emulsion (manufactured by Sumika Chemtex Co., Ltd .; S-7400) 20 which is a non-core shell structure resin based on 80 parts by mass of the solid content of the aqueous resin emulsion containing the core-shell structure resin shown in Table 1 Parts by mass (in terms of solid content), thermally expandable microcapsule foaming agent (Matsumoto Yushi Seiyaku Co., Ltd .; F-55) 10 parts by mass, calcium carbonate (Maruo Calcium Co., Ltd .; Super SSS) 80 parts by mass, oxidation An aqueous resin emulsion composition was prepared by mixing and dispersing 15 parts by mass of titanium (Chuo Rika Kogyo Co., Ltd .; T-76).
And it carried out similarly to Example 1, and obtained the foaming decorative material.

<Evaluation>
About the foaming decorative material obtained by the Example and the comparative example, the expansion ratio, blocking resistance, and crack resistance were evaluated by the method shown below. The results are shown in Table 2.

(Foaming ratio)
Measure the dry coating thickness (a) of the foamed cosmetic material before foaming, then measure the foamed layer thickness (b) of the foamed cosmetic material after foaming in a foaming furnace, and (b) / (A) was determined as the expansion ratio.

(Blocking resistance)
The obtained foamed decorative material was cut and two pieces having a size of 10 cm × 10 cm were collected. The foamed resin layers of the two foamed decorative materials were overlapped, and a load of 0.1 MPa was applied using a blocking tester, and then left for 24 hours in an environment of a temperature of 40 ° C. and a relative humidity of 90%. Thereafter, the two foamed decorative materials were peeled off, and the appearance of the peeled portion was visually evaluated.
○: No abnormality △: Partial peeling ×: Full peeling

(Crack resistance)
The foamed cosmetic material obtained was cut into a size of 3 cm × 25 cm, and was folded in an environment of 5 ° C. and 20% relative humidity, with the aqueous resin emulsion composition coating layer facing upward, The appearance was visually evaluated.
○: No abnormality △: Some cracks ×: Cracks all over

The aqueous resin emulsion compositions in Examples 1 to 8 contain a core-shell structure resin composed of a core portion of an ethylene-vinyl acetate copolymer and an acrylic ester polymer and a shell portion of a (meth) acrylic ester polymer. An aqueous resin emulsion was included. For this reason, the foamed decorative material thus obtained has a sufficient foaming ratio and is excellent in crack resistance and blocking resistance.
On the other hand, the aqueous resin emulsion in Comparative Example 1 was an ethylene-vinyl acetate copolymer alone and did not contain a core-shell structure resin. Therefore, the foamed decorative material thus obtained has a low expansion ratio and a low crack resistance.
The aqueous resin emulsion in Comparative Example 2 did not contain an acrylic polymer in the core part. Therefore, the foamed decorative material thus obtained has low blocking resistance.
The aqueous resin emulsion in Comparative Example 3 was a single particle of ethylene-vinyl acetate copolymer / acrylic polymer and did not contain a core-shell structure resin. Therefore, the foamed decorative material thus obtained has a low foaming ratio and a low blocking resistance.

It is a schematic cross section which shows one embodiment of the foaming decorative material of this invention.

Explanation of symbols

10 ... Foaming decorative material 11 ... Base material
12 ... Foamed resin layer 12a ... Resin component 12b of aqueous resin emulsion (A) ... Thermally expandable microcapsule foaming agent (B)
12c ... inorganic filler (C)
12d ... uneven pattern 13 ... printed layer

Claims (6)

An aqueous resin emulsion composition containing an aqueous resin emulsion (A), a thermally expandable microcapsule foaming agent (B), and an inorganic filler (C),
The aqueous resin emulsion (A) has a core portion containing an ethylene-vinyl acetate copolymer (A11) and a (meth) acrylic acid ester polymer (A12), and a shell containing a (meth) acrylic acid ester polymer (A2) Containing a core-shell structure resin consisting of
The content of the thermally expandable microcapsule foaming agent (B) is 2 to 30 parts by mass with respect to 100 parts by mass of the solid content of the aqueous resin emulsion (A).
Content of an inorganic filler (C) is 20-200 mass parts with respect to 100 mass parts of solid content of an aqueous resin emulsion (A), The aqueous resin emulsion composition characterized by the above-mentioned.   The core-shell structure resin contained in the aqueous resin emulsion (A) is contained in the shell part and the total amount of the ethylene-vinyl acetate copolymer (A11) and (meth) acrylate polymer (A12) contained in the core part. 2. The aqueous resin emulsion composition according to claim 1, wherein a mass ratio with the (meth) acrylic acid ester polymer (A2) is 95/5 to 50/50.   The core part of the core-shell structure resin contained in the aqueous resin emulsion (A) has a mass ratio of 99/1 to 80 / ethylene-vinyl acetate copolymer (A11) and (meth) acrylate polymer (A12). The aqueous resin emulsion composition according to claim 1, wherein the aqueous resin emulsion composition is 20.   It has a base material and a foamed resin layer provided on at least one side of the base material, and the aqueous resin emulsion composition according to any one of claims 1 to 3 is applied to the foamed resin layer and heated. A foamed decorative material characterized by being a formed layer.   The foamed decorative material according to claim 4, wherein the foamed decorative material is used as wallpaper.   A foam characterized by coating the aqueous resin emulsion composition according to any one of claims 1 to 3 on at least one surface of a substrate to form an unfoamed layer, and heating the unfoamed layer to foam. A method for producing a cosmetic material.

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