JP7429505B2 - Decorative sheet for interior - Google Patents

Description

The present invention relates to a decorative sheet for interior decoration. More specifically, the present invention relates to a decorative sheet for interior decoration, which is used by being attached to an indoor wall surface, an indoor ceiling, etc., for example.

Decorative interior sheets are widely used, for example, as interior building materials installed on walls, ceilings, and the like. Decorative interior sheets include some with wood grain or stone grain decorations, and are also used for interior decoration purposes.
On the other hand, the Building Standards Act stipulates the use of nonflammable or flame-retardant fire prevention materials for interior building materials. Decorative interior sheets are also required to exhibit a predetermined fire prevention performance.

For example, Patent Document 1 proposes a nonflammable decorative sheet having an adhesive layer on the lower surface of a thermoplastic resin sheet. The adhesive layer of the nonflammable decorative sheet contains 15 to 60 parts by mass of a brominated flame retardant and antimony trioxide to 100 parts by mass of a (meth)acrylate copolymer having a mass average molecular weight of 200,000 to 1.5 million. 5 to 20 parts by mass, 5 to 30 parts by mass of tackifier, and 0.5 to 5 parts by mass of polyisocyanate curing agent. Further, Patent Document 1 describes that by using a combination of a brominated flame retardant and antimony trioxide in a specific mixing ratio, the nonflammability specified by the Building Standards Act can be fully satisfied.

Japanese Patent Application Publication No. 2010-229327

Incidentally, in many cases of fatal accidents caused by fire, the primary cause of death is often carbon monoxide poisoning, even if the person appears to be incinerated to death. Therefore, as a countermeasure against fatal accidents caused by fire, it is thought to be urgent to consider methods for removing carbon monoxide generated when a fire occurs and reducing the indoor carbon monoxide concentration when a fire occurs.
As one such method, it is conceivable to provide interior decoration sheets with the function of removing carbon monoxide.

However, providing interior decoration sheets with the function of removing carbon monoxide has not yet been sufficiently studied. In addition, in order to prevent carbon monoxide poisoning, which is the primary cause of death in fire-related accidents, it is necessary that the carbon monoxide removal function be activated early in the event of a fire. has not yet been sufficiently implemented.

Therefore, it is an object of the present invention to provide a decorative sheet for interior use that can quickly exhibit the function of removing carbon monoxide in the event of a fire.

In order to solve this problem, as a result of intensive studies, the present inventors have developed an adhesive layer containing one or more carbon monoxide removers selected from carbon monoxide adsorbents and catalysts that detoxify carbon monoxide. The present inventors have discovered that the decorative sheet for interior use can solve the above problems, and have completed the present invention.

That is, the present invention relates to the following [1] to [5].
[1] A base material and an adhesive layer provided on one side of the base material, wherein the adhesive layer is one or more selected from carbon monoxide adsorbents and catalysts that detoxify carbon monoxide. Decorative interior sheet containing carbon monoxide remover.
[2] The interior decorative sheet according to [1] above, wherein the base material contains a polyvinyl chloride resin.
[3] The interior decorative sheet according to [1] or [2] above, wherein the carbon monoxide adsorbent contains zeolite.
[4] The interior decorative sheet according to any one of [1] to [3] above, wherein the adhesive layer contains an acrylic resin.
[5] The decorative sheet for interior decoration according to any one of [1] to [4] above, which is used by being attached to an indoor wall or an indoor ceiling.

According to the present invention, it is possible to provide a decorative interior sheet that can quickly exhibit the function of removing carbon monoxide in the event of a fire.

FIG. 1 is a cross-sectional view of a decorative interior sheet according to one embodiment of the present invention. 1 is a cross-sectional view of a decorative interior sheet according to one embodiment of the present invention, and is an embodiment including a release liner.

[Aspects of interior decorative sheet]
The interior decorative sheet of the present invention includes a base material and an adhesive layer provided on one side of the base material. The adhesive layer contains one or more carbon monoxide removers selected from a carbon monoxide adsorbent and a catalyst that renders carbon monoxide harmless.
In order to provide an interior decorative sheet that can quickly exert the function of removing carbon monoxide in the event of a fire, the inventor has conducted extensive research and has developed a carbon monoxide adsorbent and carbon monoxide that can be used in a harmless manner. We came up with the idea of using one or more carbon monoxide removers selected from catalysts that Based on this idea, the present inventor further conducted intensive studies and focused on the difference in flammability between the adhesive layer and the base material. Specifically, the base material is less flammable than the adhesive layer, and the base material may be softened by heat. Therefore, if the adhesive layer contains a carbon monoxide remover in consideration of this difference in combustibility, the adhesive layer will burn before the base material in the event of a fire and the carbon monoxide remover will burn out before the base material. It was recalled that it is possible to expose the carbon monoxide remover at an early stage and to make the carbon monoxide removal ability of the carbon monoxide removal agent manifest at an early stage. The present inventor has further conducted various studies and has completed the present invention.

[Composition of interior decorative sheet]
1 and 2 show cross-sectional views of a decorative interior sheet according to one embodiment of the present invention.
The interior decorative sheet 1a shown in FIG. 1 is a laminate in which an adhesive layer 3 containing a carbon monoxide removing agent 5 is directly laminated on one side of a base material 2.
Here, the interior decorative sheet of one embodiment of the present invention, like the interior decorative sheet 1b shown in FIG. 2, includes a base material 2, an adhesive layer 3 containing a carbon monoxide remover 5, and a release liner. 4 may be stacked in this order. In this case, when the interior decoration sheet 1b is used, the release liner 4 is peeled off from the interior decoration sheet 1b, and the exposed adhesive layer 3 is applied to an adherend.

However, the structure of the interior decoration sheet of the present invention is not limited to these.
For example, the base material 2 may have a multilayer structure.
Further, another layer may be provided between the base material 2 and the adhesive layer 3. Examples of the other layer include a primer layer and the like.
Furthermore, from the perspective of imparting waterproof and antifouling properties, a fluororesin layer containing a fluororesin is laminated as the outermost layer on the surface of the base material 2 opposite to the surface on which the adhesive layer 3 is provided. You can.
Moreover, from the viewpoint of improving the design, unevenness may be formed on the surface of the base material 2 opposite to the surface on which the adhesive layer 3 is provided. Examples of the unevenness include those formed by so-called grain processing, those having a wood grain shape, and those having a stone grain shape.
Although it is preferable that the carbon monoxide remover 5 is uniformly dispersed in the adhesive layer 3, the carbon monoxide remover 5 is not necessarily limited to such an embodiment, and may be non-uniformly dispersed. For example, the carbon monoxide remover 5 may be unevenly distributed on the surface layer side of the adhesive layer 3, or the carbon monoxide remover 5 may be unevenly distributed in the center portion of the adhesive layer 3 in the thickness direction.

<Base material>
As the base material, for example, base materials used for interior decoration sheets can be used without particular limitation.
As a base material, polyvinyl chloride (PVC); polyester such as polyethylene terephthalate (PET); polyolefin such as polyethylene (PE) and polypropylene (PP); polyurethane (PU); polymethyl methacrylate (PMMA); polyvinyl fluoride; Examples include those composed of resins such as polyvinylidene fluoride; polychlorotrifluoroethylene; polytetrafluoroethylene; ethylene-tetrafluoroethylene copolymer; and tetrafluoroethylene-hexafluoropropylene copolymer.
These resins may be used alone or in combination of two or more.
Further, the base material may have a multilayer structure composed of two types of resin layers.

When the interior decorative sheet of the present invention is attached to an adherend, the presence of the base material can prevent the adhesive layer from coming into contact with air. Therefore, it is possible to prevent the carbon monoxide remover from coming into contact with air and reduce the carbon monoxide removal ability of the carbon monoxide remover before a fire occurs, and it is possible to prevent the carbon monoxide remover from reducing its ability to remove carbon monoxide when a fire occurs. Carbon monoxide removal ability can be maximized when exposed.
Here, the thickness of the base material is set to 20 μm to 2,000 μm in order to more easily prevent the adhesive layer from coming into contact with air and to ensure easier handling as an interior decorative sheet. is preferable, 50 μm to 1,000 μm is more preferable, and even more preferably 100 μm to 500 μm.
In addition, when a base material has a multilayer structure, the thickness of a base material means the sum total of the thickness of each layer.
The thickness of the base material can be measured using, for example, a constant pressure thickness measuring device manufactured by Techlock Co., Ltd. (model number: "PG-02J", standard specifications: JIS K6783, Z1702, Z1709).
In addition, when the thickness of the base material is within the above range, the interior decoration sheet has excellent workability and fire retardant properties.

Here, in one embodiment of the present invention, it is preferable to use a polyvinyl chloride resin as the base material. Polyvinyl chloride resin has good elongation and excellent workability, so it can be suitably used as a base material for interior decorative sheets.

Polyvinyl chloride resin is a polymer having repeating units derived from vinyl chloride.
The polyvinyl chloride resin may be a homopolymer of vinyl chloride, or a copolymer of vinyl chloride and a monomer copolymerizable with the vinyl chloride.
Examples of the copolymer include copolymers mainly composed of vinyl chloride, such as ethylene-vinyl chloride copolymer, vinyl acetate-vinyl chloride copolymer, and vinyl chloride-halogenated olefin copolymer. .
In a copolymer mainly composed of vinyl chloride, the amount of repeating units derived from vinyl chloride is preferably 50 mol% or more, more preferably 60 mol% or more, and even more preferably 70 mol% or more, based on all the repeating units.

Furthermore, the polyvinyl chloride resins can be used alone or in combination of two or more. Furthermore, polyvinyl chloride resin can be used in combination with other resins. As the other resin, a resin having excellent compatibility with the polyvinyl chloride resin is preferable.
When polyvinyl chloride resin is used in combination with other resins, the amount of the other resins is usually 1 to 50 parts by mass, preferably 5 to 30 parts by mass, per 100 parts by mass of polyvinyl chloride resin. More preferably, it is 5 to 10 parts by mass.
Note that a plasticizer is added to the polyvinyl chloride resin from the viewpoint of improving processability.
As the plasticizer, any plasticizer that is compatible with the polyvinyl chloride resin can be used without particular limitation. Examples of plasticizers include phthalic acid plasticizers such as dibutyl phthalate (DBP), dioctyl phthalate (DOP), diisononyl phthalate (DINP), diisodecyl phthalate (DIDP), and diundecyl phthalate (DUP); adipic acid; Adipic acid plasticizers such as dibutyl; Phosphate plasticizers such as tributyl phosphate, tricresyl phosphate, and triphenyl phosphate; Trimellitic acid plasticizers such as tributyl trimellitate and trioctyl trimellitate; Adipic acid plasticizers such as tributyl trimellitate and trioctyl trimellitate; Various polyester plasticizers such as polyester; citric acid esters such as acetyl tributyl citrate and acetyl trioctyl citrate; and the like.
These plasticizers may be used alone or in combination of two or more.

(colorant)
The base material may contain various additives as necessary. Examples of additives include colorants.
For example, the colorant may be contained in the base material. A colored base material can be produced, for example, by adding a coloring agent to a resin composition that is a raw material for the base material, and then molding the mixture.

Here, the coloring may be applied within the base material by printing on the base material.
Further, the coloring may be applied as a printed layer formed on the base material.
The printing layer is formed, for example, by printing on a base material with ink containing a colorant. The ink may be impregnated into the substrate or deposited on the substrate.
Further, the printed layer may be protected by a protective layer. As the protective layer, a material similar to that of the above-mentioned base material can be used.

Pigments or dyes can be used as colorants. The pigment may be an organic pigment or an inorganic pigment.
Examples of the black pigment include carbon black, copper oxide, triiron tetroxide, manganese dioxide, aniline black, and activated carbon.
Examples of yellow pigments include yellow lead, zinc yellow, cadmium yellow, yellow iron oxide, mineral fast yellow, nickel titanium yellow, navel yellow, naphthol yellow S, Hansa yellow, benzidine yellow G, benzidine yellow GR, quinoline yellow lake, Permanent yellow NCG, tartrazine lake, etc. are mentioned.
Examples of the orange pigment include red yellow lead, molybdenum orange, permanent orange GTR, pyrazolone orange, Vulcan orange, industhrene brilliant orange RK, benzidine orange G, and industhrene brilliant orange GKM.
Examples of red pigments include red pigment, cadmium red, red lead, mercury sulfide, cadmium, permanent red 4R, resol red, pyrozolone red, watching red, calcium salt, lake red D, brilliant carmine 6B, eosin lake, and rhodamine. Examples include Lake B, Alizarin Lake, and Brilliant Carmine 3B.
Examples of the purple pigment include manganese purple, fast violet B, and methyl violet lake.
Examples of blue pigments include navy blue, cobalt blue, alkali blue lake, Victoria blue lake, phthalocyanine blue, metal-free phthalocyanine blue, partially chlorinated phthalocyanine blue, fast sky blue, and industhrene blue BC.
Examples of the green pigment include chrome green, chromium oxide, pigment green B, malachite green lake, and final yellow green G.
As the white pigment, for example, zinc white, titanium oxide, antimony white, zinc sulfide, etc. are used.
Examples of extender pigments include barite powder, barium carbonate, clay, silica, white carbon, talc, and alumina white.

Furthermore, examples of the dye include basic dyes, acidic dyes, disperse dyes, and direct dyes.
Examples of such dyes include nigrosine, methylene blue, rose bengal, quinoline yellow, and ultramarine blue.

The blending amount of the colorant is usually 0 to 40% by weight, preferably 10 to 30% by weight, based on the total amount of the base material (100% by weight).
Moreover, one type of coloring agent may be used alone, or two or more types may be used in combination.

Examples of the various additives other than colorants include ultraviolet absorbers, heat stabilizers, antioxidants, antistatic agents, slip agents, antiblocking agents, and flame retardants.
These may be used alone or in combination of two or more.

<Adhesive layer>
The adhesive layer has a function of attaching the interior decorative sheet to an adherend.
The interior decoration sheet of the present invention contains a carbon monoxide remover in the adhesive layer. In decorative interior sheets, the base material is usually more flammable than the adhesive layer, and the base material may soften due to heat, so by incorporating a carbon monoxide remover in the adhesive layer, In the event of a fire, the adhesive layer burns before the base material, and the carbon monoxide remover is exposed at an early stage, allowing the carbon monoxide remover to exhibit its carbon monoxide removal ability at an early stage.
In addition, if a carbon monoxide remover is added to the base material, such as thermoplastic resin such as polyvinyl chloride resin, which softens when heated, the resin will soften and melt in the event of a fire, causing carbon monoxide to be removed. The removal agent becomes covered with softened and melted resin. Therefore, the carbon monoxide removing ability of the carbon monoxide remover becomes difficult to exhibit. When the adhesive layer contains a carbon monoxide remover, the adhesive layer burns before the base material in the event of a fire, so the carbon monoxide remover is not covered by the resin that makes up the adhesive layer. exposed, and the carbon monoxide removal ability of the carbon monoxide removal agent is fully demonstrated.

The thickness of the adhesive layer is preferably 15 μm to 100 μm, more preferably 20 μm to 90 μm, even more preferably 25 μm to 80 μm.
When the thickness of the adhesive layer is 15 μm or more, the adhesive strength of the interior decorative sheet to the adherend is likely to be exhibited well. Moreover, when the thickness of the adhesive layer is 100 μm or less, it is easy to obtain a decorative sheet for interior use with excellent workability.
Incidentally, the surface of the adhesive layer to which the adhesive layer is attached to the adherend may be provided with unevenness from the viewpoint of facilitating air removal during attachment to the adherend.

(Adhesive composition)
The adhesive composition for forming the adhesive layer will be described below.
Note that the "active ingredient" in the adhesive composition refers to the components contained in the adhesive composition excluding the diluent solvent. Moreover, the content of the components contained in the adhesive composition, which will be explained below, is the content based on the total amount of the adhesive composition (based on all active ingredients) excluding the diluent solvent.

(Adhesive)
The adhesive layer is formed from an adhesive composition containing an adhesive.
Examples of the adhesive include acrylic resin, urethane resin, styrene resin, polyester resin, olefin resin, silicone resin, and polyvinyl ether resin.
These adhesive resins may be used alone or in combination of two or more.
In addition, when these resins are copolymers having two or more types of structural units, the form of the copolymer is not particularly limited, and may include block copolymers, random copolymers, and graft copolymers. It may be either.

Here, in one aspect of the present invention, from the viewpoint of versatility as an adhesive, the adhesive layer preferably contains an acrylic resin. That is, the adhesive is preferably an acrylic resin.
The content of the acrylic resin is preferably 20% to 100% by mass, more preferably 30% to 80% by mass, even more preferably 40% to 70% by mass, based on the total amount of the adhesive composition. .

In addition, the adhesive may be an emulsion type, a solvent type, or a non-solvent type, and may be a crosslinked type or a non-crosslinked type, but from the viewpoint of environment and safety, an emulsion type is preferred. It is preferable to use an acrylic emulsion type adhesive using an acrylic emulsion as an adhesive base.
The acrylic emulsion type adhesive will be explained in detail below.

The acrylic emulsion type adhesive is a (meth)acrylic acid ester polymer obtained by polymerizing an ester monomer of (meth)acrylic acid and an alkyl alcohol whose alkyl group has 1 to 18 carbon atoms. is an adhesive whose main component is dispersed in water.
In this specification, "(meth)acrylic" means "acrylic or methacrylic", and the same applies to other similar terms. For example, "(meth)acrylic ester" means "acrylic ester or methacrylic ester."
Furthermore, in this specification, the term "main component" refers to a component whose content exceeds 50% by mass based on the total amount of the constituent components.

Examples of ester monomers of (meth)acrylic acid and alkyl alcohols whose alkyl groups have 1 to 18 carbon atoms include methyl acrylate, ethyl acrylate, isopropyl acrylate, n-butyl acrylate, and acrylic acid. selected from 2-ethylhexyl acid, cyclohexyl acrylate, methyl methacrylate, ethyl methacrylate, isopropyl methacrylate, n-butyl methacrylate, isobutyl methacrylate, n-hexyl methacrylate, cyclohexyl methacrylate, lauryl methacrylate, etc. One or more types may be mentioned.
Among these, it is preferable to use at least one of n-butyl acrylate and 2-ethylhexyl acrylate as the main component.
In one aspect of the present invention, the total content of the ester monomers n-butyl acrylate and 2-ethylhexyl acrylate is preferably 70 ~100% by weight, more preferably 80~100% by weight, still more preferably 90~100% by weight, even more preferably 95~100% by weight.

Here, the (meth)acrylic acid ester polymer may be copolymerized with a vinyl monomer that is copolymerizable with the ester monomer.
However, it is preferable that the vinyl monomer is copolymerized in a proportion of 20 parts by mass or less with respect to 100 parts by mass of the ester monomer, and the vinyl monomer is copolymerized in a proportion of 10 parts by mass or less. It is more preferable that the vinyl monomer is copolymerized in a proportion of 5 parts by mass or less.

Examples of the vinyl monomer copolymerizable with the ester monomer include vinyl group-containing monomers such as styrene, α-methylstyrene, vinyltoluene, vinyl acetate, acrylonitrile, glycidyl acrylate, and glycidyl methacrylate. ; Carboxyl group-containing monomers such as acrylic acid, methacrylic acid, maleic anhydride, and itaconic acid; 2-hydroxyethyl acrylate, 2-hydroxyethyl methacrylate, 2-hydroxypropyl acrylate, and 2-hydroxy methacrylate Hydroxyl group-containing monomers such as propyl; nitrogen-containing monomers such as acrylamide, N-methylolacrylamide, dimethylaminoethyl acrylate, dimethylaminoethyl methacrylate, and vinylpyrrolidone; and the like.
Among these, carboxyl group-containing monomers are preferred, and acrylic acid is more preferred.

The ester monomer or the ester monomer and the vinyl monomer are polymerized or copolymerized using a polymerization initiator. Here, water also acts as a dispersion medium, and the (meth)acrylic ester polymer or (meth)acrylic ester copolymer obtained by polymerization or copolymerization is dispersed by the surfactant. By dispersing these in water, an acrylic emulsion type adhesive is produced, and an adhesive layer is formed from the adhesive composition containing the acrylic emulsion type adhesive.

The surfactant can be appropriately selected from conventionally known anionic, nonionic, and cationic emulsifiers and synthetic polymer emulsifiers.
Among these, from the viewpoint of improving water-resistant adhesive strength, it is preferable to use a reactive emulsifier. Note that the term "reactive emulsifier" refers to an emulsifier that has a reactive functional group in its molecule, and means an emulsifier that can chemically bond to the polymer in the micelles during the process of emulsion polymerization.

The reactive emulsifier is not particularly limited as long as it is an emulsifier that can chemically bond with the polymer in the micelles during the emulsion polymerization process, but examples include Adekaria Soap SE-20N (anionic type) manufactured by Asahi Denka Co., Ltd. Adekaria Soap SE-10N (anionic), Adekaria Soap NE-10 (nonionic), Adekaria Soap NE-20 (nonionic), Adekaria Soap NE-30 (nonionic), Adekaria Soap NE-40 (Nonionic), Adekarya Soap SDX-730 (Anionic), Adekarya Soap SDX-731 (Anionic), Eleminol JS-2 (Anionic) and Eleminol RS-30 (Anionic) manufactured by Sanyo Kasei Co., Ltd. ), Latemul S-180A (anionic type) and Latemul S-180 (anionic type) manufactured by Kao Corporation, Aqualon BC-05 (anionic type), Aqualon BC-10 (anionic type) manufactured by Daiichi Kogyo Seiyaku Co., Ltd. , Aqualon BC-20 (anionic type), Aqualon HS-05 (anionic type), Aqualon HS-10 (anionic type), Aqualon HS-20 (anionic type), Aqualon RN-10 (nonionic type), Aqualon RN-20 (Nonionic), Aqualon RN-30 (Nonionic), Aqualon RN-50 (Nonionic), New Frontier S-510 (Anionic), and New Frontier A-229E (Anionic), manufactured by Toho Chemical Industry Co., Ltd. Examples include phosphinol TX (anionic).
These may be used alone or in combination of two or more.

The amount of the reactive emulsifier used is usually 0.5 to 4.5 parts by weight per 100 parts by weight of the ester monomer or 100 parts by weight of the ester monomer and the vinyl monomer. The amount is preferably 0.5 to 3.0 parts by weight, more preferably 0.5 to 2.0 parts by weight.

Examples of the polymerization initiator include persulfates such as potassium persulfate and ammonium persulfate; peroxides such as hydrogen peroxide, cumene hydroperoxide, and t-butyl hydroperoxide; azobisisobutyronitrile; used. In addition, when polymerizing at a relatively low temperature, it is also possible to carry out redox polymerization using a reducing agent such as sodium thiosulfate, sodium bisulfite, and sodium pyrophosphate.

In addition, in the polymerization or copolymerization of the ester monomer or the ester monomer and the vinyl monomer, at least one of a chain transfer agent and a molecular weight regulator is used to adjust the molecular weight of the polymer. You can.
Examples of the chain transfer agent include dodecyl mercaptan and lauryl mercaptan.
Furthermore, examples of molecular weight modifiers include α-methylstyrene dimer and the like.

Here, from the viewpoint of stabilizing the produced acrylic emulsion adhesive, a protective colloid may be added to the acrylic emulsion adhesive.
As the protective colloid, water-soluble polymer compounds such as polyvinyl alcohol, polyvinyl alcohol derivatives, carboxymethyl cellulose, and cellulose derivatives such as hydroxyethyl cellulose are used.

Further, a crosslinking agent may be added to the acrylic emulsion type adhesive, if necessary. Examples of the crosslinking agent include epoxy compounds, carbodiimide compounds, oxazoline compounds, hydrazide compounds, isocyanate compounds, aziridine compounds, alkoxysilane compounds, amine compounds, and metal chelate compounds.

Furthermore, an emulsion-type tackifier may be added to the acrylic emulsion-type pressure-sensitive adhesive, if necessary. An emulsion type tackifier is a water-based tackifier in which a tackifying resin is emulsified and dispersed in water.
The tackifying resin includes, for example, one or more selected from rosin resins, terpene resins, and the like.
The emulsion type tackifier is not particularly limited as long as it emulsifies a tackifier resin and disperses it in water. Company manufactured Super Ester E-720, Super Ester E-730-55, Super Ester E-788, Super Ester E-900-NT, Super Ester E-910NT, Super Ester E-865, Super Ester E-865-NT , Super Ester NS-100H, and Super Ester NS-121, as well as Harie Star SK-370N and Harie Star SK-218NS manufactured by Harima Kasei Group Co., Ltd., and the like. Examples of emulsion-type tackifiers in which the tackifying resin is a terpene resin include Tamanol E-100, Tamanol E-300-NT, and Tamanol E-200-NT manufactured by Arakawa Chemical Industries, Ltd.
These may be used alone or in combination of two or more.

(Carbon monoxide remover)
The adhesive composition further contains a carbon monoxide remover.
The carbon monoxide remover is one or more selected from a catalyst that detoxifies carbon monoxide and a carbon monoxide adsorbent.

Examples of catalysts that render carbon monoxide harmless include transition metals that have the ability to oxidize carbon monoxide. As the transition metal having the ability to oxidize carbon monoxide, ruthenium, rhodium, palladium, platinum, etc. are preferably used.
Here, the catalyst that detoxifies carbon monoxide may be in the form of a catalyst composition containing a transition metal capable of oxidizing carbon monoxide. In the present invention, such a catalyst composition is also included in the catalyst that detoxifies carbon monoxide.
The catalyst composition may have any composition as long as it contains a transition metal capable of oxidizing carbon monoxide. Examples include a catalyst composition comprising a transition metal capable of oxidizing carbon monoxide and iron oxide, and a catalyst composition comprising a transition metal capable of oxidizing carbon monoxide and alumina. Here, from the viewpoint of improving the removal efficiency of carbon monoxide, a composite oxide mainly containing a transition metal having carbon monoxide oxidizing ability, at least one transition metal selected from chromium, iron, cobalt, and copper, and manganese. A catalyst composition consisting of

A catalyst composition consisting of a transition metal capable of oxidizing carbon monoxide and a composite oxide mainly composed of at least one transition metal selected from chromium, iron, cobalt, and copper and manganese is, for example, firstly composed of chromium, cobalt, and copper. A pH adjuster such as aqueous ammonia is added to an aqueous solution in which salts of at least one transition metal selected from iron, cobalt, and copper (nitrates, sulfates, etc.) and manganese salts (nitrates, sulfates, etc.) are dissolved. The hydroxides precipitated in an aqueous solution are calcined in the air at 200°C to 300°C to remove impurities to obtain these composite oxides, and then After dispersing an aqueous solution of transition metal salts (nitrates, sulfates, etc.) that have carbon monoxide oxidation ability into this composite oxide, it is calcined in air at 200°C to 300°C to remove impurities. It can be prepared by desorption. The catalyst composition thus prepared was dispersed in water together with a binder such as silica sol, mixed uniformly to form a slurry, and this was applied to a support such as a ceramic honeycomb filter. After that, it is fired in air at 200°C to 300°C to form a catalyst that renders carbon monoxide harmless. Ceramic supports have excellent adhesion for supporting slurry-like materials, so they can support a large amount of catalyst composition even with a small amount of binder, there is little fear of corrosion due to harmful gas components, and they are inexpensive. It is convenient in such respects.
Other catalysts that render carbon monoxide harmless include, for example, a copper-zinc catalyst, a catalyst in which gold nanoparticles with a diameter of 10 nm or less are supported on a porous iron oxide carrier, and the like.

As the carbon monoxide adsorbent, any material can be used without particular limitation as long as it has the ability to adsorb carbon monoxide, but it is preferable to use zeolite.
Zeolites are natural zeolites and synthetic zeolites represented by the general formula MeO.Al ₂ O ₃ .mSiO ₂ .nH ₂ O (Me is Na, Ca, or K). Zeolite has the ability to easily desorb water in its crystal structure, and the resulting pores to adsorb gas.
The pore structure of synthetic zeolite is determined by its crystal structure, and the pore radius is determined by the distance between crystal lattices.
Here, from the viewpoint of adsorbing carbon monoxide more efficiently and selectively, it is preferable that the pore radius is 3 Å to 10 Å.
Moreover, zeolite is preferable, which adsorbs carbon monoxide by chemical adsorption rather than physical adsorption. For example, it is preferable that the metal ion is replaced with a transition metal ion such as iron, cobalt, or nickel.
The particle size of the zeolite is preferably about 0.5 μm to 5 μm.

The carbon monoxide remover is preferably encapsulated in microcapsules. Since the carbon monoxide remover is encapsulated in microcapsules, the carbon monoxide remover can be retained until a fire occurs without exposing it to the air. In the event of a fire, the microcapsules break and the carbon monoxide remover encapsulated in the microcapsules is exposed, allowing the carbon monoxide remover to maximize its carbon monoxide removal ability.
There are no particular limitations on the microencapsulation method, and known methods such as interfacial polymerization, submerged drying, spray drying, and dry mixing can be used.
When the carbon monoxide removal agent is microencapsulated by the interfacial polymerization method, any known membrane material used in microencapsulation can be appropriately used. Such membrane materials include, for example, polyamides formed using polybasic acid halides as oil-soluble monomers and polyamines as water-soluble monomers; polyamides formed using polybasic acid halides as oil-soluble monomers and polyamines as water-soluble monomers; Examples include polyesters formed using polyphenols, polyurethanes formed using isocyanates as oil-soluble monomers, and polyols as water-soluble monomers.

The content of the carbon monoxide remover in the adhesive composition is preferably 10 parts by mass or more and 40 parts by mass or less, more preferably 15 parts by mass or more and 35 parts by mass or less, and even more preferably is 20 parts by mass or more and 30 parts by mass or less.

(Other ingredients)
The adhesive composition may contain other components as long as they do not impair the effects of the present invention. Other components that may be included in the adhesive include, for example, flame retardants, ultraviolet absorbers, antioxidants, preservatives, antifungal agents, plasticizers, antifoaming agents, and wettability modifiers.

<Release liner>
The release liner is not particularly limited as long as it can prevent the decorative interior sheet from sticking to unintended surfaces during storage and can be easily peeled off from the adhesive layer when the decorative interior sheet is used.
Examples of the base material constituting the release liner include paper, and a resin film made of one or more resins selected from polyethylene, polypropylene, polyester, and the like. A material whose bonding surface with the adhesive layer of this base material is treated with a release agent is preferably used. Examples of the release agent include silicone release agents.

<Method for manufacturing interior decorative sheets>
The method for producing the interior decorative sheet of the present invention is not particularly limited, but for example, by applying the above-mentioned adhesive composition to an appropriate thickness on one side of a base material, heating and drying the adhesive composition. , an adhesive layer can be formed on one side of the base material. The above-mentioned release liner may be attached to the adhesive layer.
Alternatively, the above-mentioned adhesive composition is applied to the release-treated surface of the release liner to an appropriate thickness, heated and dried to form an adhesive layer on the release liner. Thereafter, the adhesive layer may be transferred to one side of the base material to form the adhesive layer on one side of the base material.
The temperature at which the applied pressure-sensitive adhesive composition is heated is, for example, 80°C to 150°C.
As a coating method, conventionally known methods such as a roll coating method, a knife coating method, a bar coating method, a gravure coating method, a die coating method, and a curtain coating method can be applied.

<Applications of interior decorative sheets>
The interior decoration sheet of the present invention is preferably used by being attached to, for example, an indoor wall surface or an indoor ceiling.
Specifically, the interior decorative sheet of the present invention can be used, for example, as a wall covering material.
The decorative interior sheet of the present invention can be applied to, for example, an indoor wall surface, an indoor ceiling, etc., so that it can quickly exert its carbon monoxide removal function in the event of a fire outbreak. Therefore, it contributes to reducing carbon monoxide poisoning, which is the primary cause of death in fire-related accidents.

1a, 1b Interior decorative sheet 2 Base material 3 Adhesive layer 4 Release liner 5 Carbon monoxide remover

Claims (4)

comprising a base material and an adhesive layer provided on one side of the base material,
The adhesive layer is covered with the adhesive layer without being exposed from the adhesive layer, and one or more types of carbon monoxide removal selected from a carbon monoxide adsorbent and a catalyst that detoxifies carbon monoxide. Contains an agent,
The carbon monoxide removing agent contains zeolite,
A decorative sheet for interior use , wherein the carbon monoxide removing agent is encapsulated in microcapsules . The interior decorative sheet according to claim 1, wherein the base material contains a polyvinyl chloride resin. The interior decorative sheet according to claim 1 or 2 , wherein the adhesive layer contains an acrylic resin. The decorative sheet for interior decoration according to any one of claims 1 to 3 , which is used by being attached to an indoor wall or an indoor ceiling.