JP3664183B2 - Interior decorative material - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a decorative material such as a foam wallpaper used as a building material, particularly as an interior material, and for interior materials having high pollution-free properties that pass the quasi-incombustible (second grade) and non-flammable (first grade) of the Building Standard Law. It relates to cosmetic materials.
[0002]
[Prior art]
Conventionally, soft polyvinyl chloride is mainly used as wallpaper used as an interior material. However, this wallpaper using polyvinyl chloride has a problem in terms of adverse effects on the human body and the surrounding environment because hydrochloric acid gas which is a toxic gas and a large amount of black smoke are generated during combustion.
[0003]
In order to improve the drawbacks of wallpaper using such a polyvinyl chloride resin, a wallpaper using an aqueous emulsion such as acrylic or olefin has been developed. The use of aqueous emulsion eliminates the generation of toxic gases such as polyvinyl chloride wallpaper. Conventionally, this water-based emulsion wallpaper uses foam-suppressing technology that uses foam-suppressing ink to form uneven patterns on the surface of foamed wallpaper. When applied to the above, there is a problem that the foam suppressing effect is not sufficiently obtained, and a high design property due to the uneven pattern on the surface cannot be obtained.
[0004]
The present inventors examined the cause of such a problem, and found that the polymerization degree of the resin component used for the foamed resin layer had an influence. As the resin component of the foamed resin layer used in conventional aqueous emulsion wallpaper, those having a relatively high degree of polymerization exceeding 3000 are used.
[0005]
[Problems to be solved by the invention]
The present invention has been made in view of the above-described conventional problems, and the object of the present invention is to enable foaming suppression technology and to generate a toxic gas at the time of combustion and to have less pollution and less pollution. It is to provide a cosmetic material.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the interior decorative material of the present invention comprises an acrylic acid alkyl ester or methacrylic acid alkyl ester monomer having an alkyl group having 1 to 8 carbon atoms on a flame-retardant substrate, and 1 An alkyl acrylate copolymer resin having a degree of polymerization of 1000 to 3000, and a foaming agent obtained from an α, β-ethylenically unsaturated carboxylic acid monomer having 3 to 9 carbon atoms and having at least one free carboxyl group It is characterized by providing an alkyl acrylate resin layer containing at least, printing a desired pattern with a foam suppression ink, and then foaming.
[0007]
Hereinafter, the configuration of the present invention will be described in more detail.
[0008]
FIG. 1 is a cross-sectional view of a foam wallpaper according to an embodiment of the present invention.
[0009]
The foamed wallpaper shown in FIG. 1 is formed by providing an alkyl acrylate resin layer 2 on a flame-retardant substrate 1, printing a desired pattern with general ink 3 and foam suppression ink 4 on the surface, and then foaming. Is.
[0010]
The alkyl acrylate resin layer 2 of the present invention uses an alkyl acrylate copolymer resin having a polymerization degree of 1000 to 3000 as a resin component, and at least a foaming agent is added. Usually, a plasticizer and an inorganic filler are further added thereto. The plastisol obtained by mixing a stabilizer, a diluent and the like is applied on the substrate 1.
[0011]
The alkyl acrylate copolymer resin used as the resin component is an acrylic acid alkyl ester or methacrylic acid alkyl ester monomer having an alkyl group having 1 to 8 carbon atoms and 3 carbon atoms having one or more free carboxyl groups. ˜9 monomers of α, β-ethylenically unsaturated carboxylic acid.
[0012]
Examples of the acrylic acid alkyl ester or methacrylic acid alkyl ester having an alkyl group having 1 to 8 carbon atoms include ethyl acrylate, propyl acrylate, n-butyl acrylate, ethyl methacrylate, n-butyl methacrylate, and the like. A seed may be used independently and may be used combining two or more sorts.
[0013]
Examples of the C3-9 α, β-ethylenically unsaturated carboxylic acid monomer having one or more free carboxyl groups include acrylic acid, methacrylic acid, ethacrylic acid, and the like. A seed may be used independently and may be used combining two or more sorts.
[0014]
Such an acrylic acid alkyl ester or methacrylic acid alkyl ester monomer having an alkyl group having 1 to 8 carbon atoms and an α, β-ethylenically unsaturated group having 3 to 9 carbon atoms having one or more free carboxyl groups An alkyl acrylate copolymer resin can be obtained from a carboxylic acid monomer by a known polymerization method. In the present invention, among these alkyl acrylate copolymer resins, the degree of polymerization is 1000 to 3000. Use one. When the degree of polymerization is less than 1000, there is a problem in physical properties such as strength, and when the degree of polymerization exceeds 3000, there is a problem that the foam suppression effect when the foam suppression ink is used cannot be sufficiently obtained. As a method for obtaining a copolymer having a polymerization degree of 1000 to 3000, usually, when reacting by emulsion polymerization or fine suspension polymerization, the polymerization conditions such as adding a chain transfer agent to adjust the molecular weight are adjusted. Alternatively, a polymerization regulator or the like is used.
[0015]
As the foaming agent used in the present invention, for example, an azodicarboxylic acid amide-based organic foaming agent is preferable. Specifically, all foaming agents conventionally used for polyvinyl chloride foam wallpaper can be used. The foaming start temperature is preferably in the range of 180 to 200 ° C. As for the compounding quantity of a foaming agent, 3-7 weight part is preferable with respect to 100 weight part of resin solid content. When the blending amount is less than 3 parts by weight, the foaming suppression effect is inferior, and when it exceeds 7 parts by weight, the foamed cells are in a rough state.
[0016]
As the plasticizer used in the present invention, for example, a phthalic acid alkyl ester plasticizer having a molecular weight of 360 to 480 is preferable. Specifically, dibutyl phthalate, di-n-nonyl phthalate, di-2-ethylhexyl phthalate, di- Examples include n-nonyl phthalate. As for the compounding quantity of a plasticizer, 50-80 weight part is preferable with respect to 100 weight part of resin solid content. If the blending amount is less than 50 parts by weight, the viscosity of the sol is too high to be applied satisfactorily, and if it exceeds 80 parts by weight, a bleeding phenomenon occurs in which excess plasticizer oozes out to the surface.
[0017]
As the inorganic filler used in the present invention, for example, aluminum hydroxide is suitable. The particle diameter is preferably 3 to 10 μm, and if it is less than 3 μm, the viscosity increases, and if it exceeds 10 μm, sedimentation may occur. As for the compounding quantity of aluminum hydroxide, 50-150 weight part is preferable with respect to 100 weight part of resin solid content. When the blending amount is less than 50 parts by weight, the flame retardancy is insufficient, and when it exceeds 150 parts by weight, the viscosity and strength are adversely affected. In addition, instead of aluminum hydroxide, metal hydroxides or calcium carbonate belonging to groups I to III of the periodic table can be used. If the total amount is 150 parts by weight or less, these compounds can be used. Two or more types can be used in combination.
[0018]
As the stabilizer used in the present invention, for example, those having metal ions such as Na, Ca, K, Ba and the like centering on ZnO are suitable, and those generally used for chemical embossing of polyvinyl chloride are as follows. It can be used. As for the compounding quantity of a stabilizer, 2-5 weight part is preferable with respect to 100 weight part of resin solid content. If the blending amount is less than 2 parts by weight, the foaming suppression effect is insufficient, and if it exceeds 5 parts by weight, the foamed state tends to become rough.
[0019]
In the present invention, various pigments can be used in addition to the above, and titanium oxide pigments are particularly preferably used. The blending amount is suitably about 10 to 20 parts by weight with respect to 100 parts by weight of the resin solid content.
[0020]
In the present invention, a diluent is usually used for the purpose of improving the applicability. As the diluent, an aliphatic hydrocarbon is particularly preferable. Aromatic hydrocarbons are less desirable because their viscosity increases over time. As for the compounding quantity of a diluent, 10-20 weight part is preferable with respect to 100 weight part of resin solid content. When the blending amount is less than 10 parts by weight, high-speed coating is difficult, and when it exceeds 20 parts by weight, the viscosity of the plastisol tends to be dilatant under a high shearing force.
[0021]
As a method for applying the plastisol obtained by mixing the above components onto the substrate 1, a conventionally known application method such as a comma coater, roll coater, bar coater, knife coater or the like can be used. is there. Therefore, the mixing and application of the plastisol can use the same apparatus as that for the polyvinyl chloride resin. After coating, the coating layer is dried through a drying oven or the like at a temperature at which the foaming agent does not foam.
[0022]
The coating amount of the plastisol is not particularly limited in the present invention, but a range of about 200 to 300 g / m ² is appropriate considering the volume feeling of the resulting cosmetic material.
[0023]
In addition, as the flame-retardant substrate 1 used in the present invention, flame-retardant paper, inorganic paper, or the like that is usually used is suitable, and the same backing paper as in the case of polyvinyl chloride wallpaper can be used.
[0024]
Thus, after forming an alkyl acrylate-based resin layer on the substrate 1, printing a desired pattern by gravure printing or the like using the general ink 3 and the foaming suppression ink 4, and then heating or foaming or suppressing, 1 foam wallpaper is obtained. Heating foaming is performed by heating the raw fabric with hot air through a drying furnace.
[0025]
As the foam suppression ink 4, all foam suppression inks used for chemical embossing of polyvinyl chloride wallpaper can be used. In the present invention, an ink containing trimellitic acid or benzotriazole as an inhibitor is particularly preferable.
[0026]
[Action]
According to the present invention, by providing an alkyl acrylate resin layer having a degree of polymerization in a specific range on a flame-retardant base material, a good foam suppression effect by the foam suppression ink can be obtained, and the surface uneven pattern A highly decorative foamed decorative material can be obtained.
[0027]
In addition, according to the present invention, since a non-vinyl chloride cosmetic material having an alkyl acrylate resin layer provided on a flame-retardant base material is obtained, there is no generation of toxic gas at the time of combustion like a vinyl chloride cosmetic material. Because it emits less smoke, a non-polluting, environmentally friendly cosmetic material can be obtained.
[0028]
【Example】
Hereinafter, the present invention will be described more specifically with reference to examples.
[0029]
First, 70 parts by weight of methyl methacrylate and 27 parts by weight of butyl methacrylate as the acrylate monomers and 3 parts by weight of methacrylic acid as the unsaturated carboxylic acid monomer are used to form an alkyl acrylate having a degree of polymerization of 2000 by a known suspension polymerization method. A resin was obtained.
[0030]
Next, after the following blending is performed on the alkyl acrylate resin obtained above, the thickness after drying on flame retardant paper (80 g / m ² ) using a comma coater is 0.15 mm. The coating was performed as described above, and drying was performed in a drying furnace at 150 to 170 ° C.
[0031]
Formulation (unit is parts by weight)
・ Alkyl acrylate resin 100
・ Plasticizer DOP 70
・ Foaming agent AZ-S (Otsuka Chemical Co., Ltd.) 4
・ Stabilizer KF-80A-8 (Kyodo Pharmaceutical Co., Ltd.) 1
・ Stabilizer 2C-M (Kyodo Pharmaceutical Co., Ltd.) 3
・ Flame retardant B-143 (Nippon Light Metal Co., Ltd.) 80
・ Titanium oxide 1035 (white) (manufactured by Nichihiro Bix) 15
・ Diluent D-40 (Exxon Chemical) 15
Next, after printing a predetermined pattern using general ink and trimellitic acid-containing foam suppression ink on a gravure printing machine, heating and foaming in a drying furnace at 200 to 220 ° C. Obtained.
[0032]
The flammability test of the foamed wallpaper thus obtained was performed in accordance with “JIS A 1321-1975” in accordance with Ministry of Construction Public Notice No. 1372. That is, when the obtained foamed wallpaper was provided on a non-combustible gypsum board substrate, and the amount of hydrochloric acid gas generated was measured by the NBS method, the calorific value (tdθ) = 46 and the amount of smoke generated (CA) = 6. It was not detected.
[0033]
【The invention's effect】
As described above in detail, according to the present invention, by providing an alkyl acrylate resin layer having a degree of polymerization in a specific range on a flame retardant base material, a good foam suppression effect by the foam suppression ink. Can be obtained, and a foamed decorative material with high designability due to the uneven pattern on the surface can be provided.
[0034]
In addition, according to the present invention, since a non-vinyl chloride cosmetic material having an alkyl acrylate resin layer provided on a flame-retardant base material is obtained, generation of toxic gas at the time of combustion like a vinyl chloride cosmetic material is generated. In addition, since it emits less smoke, it is possible to provide a non-polluting, environmentally friendly cosmetic material.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a foam wallpaper according to an embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Flame retardant base material 2 Alkyl acrylate resin layer 3 General ink 4 Foam suppression ink

Claims (1)

On a flame-retardant base material, an acrylic acid alkyl ester or methacrylic acid alkyl ester monomer having an alkyl group having 1 to 8 carbon atoms, and α having 3 to 9 carbon atoms having one or more free carboxyl groups. An alkyl acrylate copolymer resin having a polymerization degree of 1000 to 3000 obtained from a monomer of β-ethylenically unsaturated carboxylic acid, and an alkyl acrylate resin layer containing at least a foaming agent are provided. A decorative material for interiors, wherein a desired pattern is printed and then foamed.

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