Antiviral water-based overcoat compositions and articles

Abstract

To provide an antiviral aqueous overcoat composition capable of forming a coating film having an excellent appearance without dripping of a coating material even when the interior coating film is painted thereon with a roller, brush, pad, or spray, and to provide an article having antiviral properties and including a coating film with an excellent appearance.SOLUTION: An antiviral aqueous overcoat composition contains a binder component, a copper compound, and water, wherein the binder component contains a polysaccharide, the copper compound contains at least one selected from the group consisting of a divalent cation of the copper compound, a divalent copper ion salt, and a divalent copper ion complex, and the total mass of solids with respect to the total mass of the antiviral aqueous overcoat composition is 0.01 to 5 mass%. There is also provided an article having a dried coating film of the antiviral aqueous overcoat composition on at least a portion of a surface of a coated object.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to antiviral aqueous overcoat compositions and articles. [Background technology]

[0002] In recent years, there has been a demand for a method for easily imparting antiviral properties to interior surfaces such as walls. One method for easily imparting antiviral properties to interior surfaces is to apply an antiviral paint with a roller or the like to form a coating film (see, for example, Patent Document 1).

[0003] In Patent Document 1, photocatalytic titanium oxide particles are used to obtain antibacterial and antiviral properties, and have the advantage of exhibiting good antibacterial and antiviral properties. On the other hand, titanium oxide may cause the paint film to fade due to its photocatalytic action. In addition, if the paint of Patent Document 1 or the like is simply diluted so that the paint solids concentration is 5 mass% or less and applied on a dark paint film such as black used for interior decoration, the photocatalytic titanium oxide or binder components in the paint may aggregate to cause white unevenness, which may deteriorate the appearance of the paint film.

[0004] Silver compounds are also used as antiviral agents, but they turn black when exposed to ultraviolet light, reducing the appearance of the coating.

[0005] Copper compounds are also used as antiviral agents, and since monovalent copper has a stronger antiviral effect than divalent copper, monovalent copper is generally used as an antiviral agent. However, when monovalent copper is used as an antiviral agent, it is usually used as copper iodide to stabilize the monovalent copper. However, when a coating is further formed with an antiviral paint containing copper iodide on a deep black coating, the copper iodide particles aggregate in the antiviral coating, which is observed as white unevenness and deteriorates the appearance of the coating. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2019-011418 A Summary of the Invention [Problem to be solved by the invention]

[0007] In addition, in the examples of Patent Document 1, the coating composition is applied by air spray, but the coating properties by roller, brush, and trowel are not evaluated. When the present inventors applied the coating composition of Patent Document 1 by roller, brush, spray, and trowel using a coating diluted to a coating solids concentration of 5 mass% or less, they found that the coating dripped and the workability was poor.

[0008] Therefore, an object of the present invention is to provide an anti-viral aqueous overcoat composition that is capable of forming a coating film with excellent appearance without dripping, even when applied over an interior coating film using a roller, brush, spray, or trowel.

[0009] Another object of the present invention is to provide an article having antiviral properties and an excellent coating appearance. [Means for solving the problem]

[0010] The antiviral aqueous overcoat composition according to the present invention is an antiviral aqueous overcoat composition comprising a binder component, a copper compound, and water, The binder component includes a polysaccharide, The copper compound includes at least one selected from the group consisting of a divalent cation of a copper compound, a salt of a divalent copper ion, and a complex of a divalent copper ion; The antiviral aqueous overcoat composition has a total mass of solids of 0.01 to 5 mass% relative to the total mass of the antiviral aqueous overcoat composition, which makes it possible to form a coating film with excellent appearance without dripping even when the composition is applied onto an interior coating film using a roller, brush, trowel, or spray.

[0011] In one embodiment of the antiviral aqueous overcoat composition according to the present invention, the polysaccharide has a carboxyl group, a carboxylalkyl group, a sulfonic acid group, a phosphoric acid group, an amino group, an acetamide group, or a quaternary ammonium group.

[0012] In one embodiment of the antiviral aqueous overcoat composition according to the present invention, the polysaccharide is one or more selected from the group consisting of xanthan gum, cellulose nanofiber, diutan gum, guar gum, carboxymethyl cellulose, hydroxymethyl cellulose, and anionic functional group-containing derivatives thereof, cationized cellulose, chitin nanofiber, and chitosan nanofiber.

[0013] In one embodiment of the antiviral aqueous overcoat composition according to the present invention, the content of the polysaccharide is 0.05 to 0.5 mass% relative to the total mass of the antiviral aqueous overcoat composition, and the content of the copper compound is 0.5 to 100 parts by mass in terms of elemental copper relative to 100 parts by mass of the binder component.

[0014] In one embodiment of the antiviral aqueous overcoat composition according to the present invention, the content of the water is 60 to 99.8% by mass based on the total mass of the antiviral aqueous overcoat composition.

[0015] In one embodiment of the antiviral aqueous overcoat composition according to the present invention, the antiviral aqueous overcoat composition is for roller application, brush application, trowel application, or spray application.

[0016] The article according to the present invention is an article having a dried coating film of any one of the above antiviral aqueous overcoat compositions on at least a part of the surface of a substrate, thereby providing excellent antiviral properties and coating appearance. Effect of the Invention

[0017] According to the present invention, it is possible to provide an antiviral aqueous overcoat composition that can form a coating film with excellent appearance without dripping even when applied to an interior coating film using a roller, brush, trowel, or spray. Also, according to the present invention, it is possible to provide an article that has antiviral properties and a coating film with excellent appearance. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] Hereinafter, embodiments of the present invention will be described. These descriptions are intended to be illustrative of the present invention and are not intended to limit the present invention in any way.

[0019] In the present invention, two or more embodiments can be combined in any manner.

[0020] In the present invention, the term "solid content" is a concept that encompasses solid content, non-volatile content, and active ingredients. In the present invention, water and simple organic solvents are not included in the active ingredients.

[0021] In this specification, unless otherwise specified, numerical ranges are intended to include the upper and lower limits of the range. For example, 0.01 to 5% by mass means a range of 0.01% by mass or more and 5% by mass or less.

[0022] In the present invention, "even when applied over an interior paint film using a roller, brush, trowel or spray" means that the present invention is applicable at least when applied over an interior paint film using a roller, brush, trowel or spray, and is not intended to exclude applications other than interior use or painting by means other than a roller, brush, trowel or spray.

[0023] In the present invention, the term "complex" is synonymous with coordination compound. The ligands of a coordination compound may be monodentate or polydentate.

[0024] As used herein, the term "coating" refers to a "dry coating" unless otherwise specified.

[0025] In this specification, the "antiviral aqueous overcoat composition of the present invention" may be simply referred to as the "composition of the present invention." Also, in this specification, the "dried coating film of the antiviral aqueous overcoat composition" may be simply referred to as the "coating film of the present invention."

[0026] (Antiviral Water-Based Overcoat Composition) The antiviral aqueous overcoat composition according to the present invention is an antiviral aqueous overcoat composition comprising a binder component, a copper compound, and water, The binder component includes a polysaccharide, The copper compound includes at least one selected from the group consisting of a divalent cation of a copper compound, a salt of a divalent copper ion, and a complex of a divalent copper ion; The antiviral aqueous overcoat composition has a total mass of solid contents of 0.01 to 5 mass % relative to the total mass of the antiviral aqueous overcoat composition.

[0027] Each component contained in the composition of the present invention will be described below.

[0028] Binder components The binder component functions as a film former. The binder component of the present invention comprises a polysaccharide.

[0029] ·Polysaccharide The polysaccharide may be appropriately selected from known polysaccharides used as binder components. The polysaccharide may function as a thickener in addition to the function as a binder component.

[0030] As described above, when a coating film is formed in a state in which the paint of Patent Document 1 or the like is diluted and the solid differentiation is low, the antiviral agent or binder component in the paint aggregates and white unevenness occurs in the state of low solid differentiation. When a polysaccharide having a thickening effect is used in such a paint, it is expected that the antiviral agent or binder component will further aggregate, but the inventors of the present invention unexpectedly found that the aggregation of the antiviral agent or binder component is suppressed when a polysaccharide is used with a specific copper compound. Although it is not desired to be bound by theory, it is speculated that the mechanism is that the functional group contained in the polysaccharide acts with a specific copper compound to suppress aggregation.

[0031] Examples of polysaccharides include xanthan gum, cellulose, starch, amylose, amylopectin, glycogen, guar gum, glucan, curdlan, paramylon, chitin, chitosan, dextran, nigeran, agarose, carrageenan, heparin, alginic acid, hyaluronic acid, pectin, xyloglucan, xylan, glucomannan, levan, diutan gum (deutan gum), welan gum, gellan gum, and derivatives thereof.

[0032] Examples of the derivatives include carboxymethyl cellulose, hydroxymethyl cellulose, anionized cellulose having an anionic functional group, and cationized cellulose having a cationic functional group.

[0033] Examples of the anionic functional group of anionized cellulose include a carboxyl group, a carboxylalkyl group, a sulfonic acid group, and a phosphoric acid group. The carboxyl group is, for example, Na + , K + , NH4 + It may have a counter ion such as

[0034] Examples of the cationic (cationic) functional group of the cationized cellulose include a quaternary ammonium group, an ammonium alkyl group, and an amino group (NH2-, NHR-, NR2-, where R is an alkyl group). The quaternary ammonium group is, for example, Cl - It may have a counter ion such as

[0035] The polysaccharide may be in the form of nanofibers, such as cellulose nanofibers.

[0036] In one embodiment of the antiviral aqueous overcoat composition of the present invention, the polysaccharide has a carboxyl group, a carboxylalkyl group, a sulfonic acid group, a phosphate group, an amino group, an acetamide group (CHC(O)NH-), or a quaternary ammonium group.

[0037] In one embodiment of the antiviral aqueous overcoat composition according to the present invention, the polysaccharide is one or more selected from the group consisting of xanthan gum, cellulose nanofiber, diutan gum, guar gum, carboxymethyl cellulose, hydroxymethyl cellulose, and anionic functional group-containing derivatives thereof, cationized cellulose, chitin nanofiber, and chitosan nanofiber.

[0038] In one embodiment, the polysaccharide is a polysaccharide that does not exhibit substantial reducing properties (non-reducing polysaccharide).

[0039] The polysaccharides may be used alone or in combination of two or more kinds.

[0040] The proportion of polysaccharides in the binder component may be appropriately adjusted, and is, for example, 5 to 100% by mass relative to the total mass of the binder component. In one embodiment, the proportion of polysaccharides in the binder component is 5% by mass or more, 10% by mass or more, 20% by mass or more, 30% by mass or more, 40% by mass or more, 50% by mass or more, 60% by mass or more, 70% by mass or more, 80% by mass or more, 90% by mass or more, or 100% by mass. In another embodiment, the proportion of polysaccharides in the binder component is 100% by mass or less, 90% by mass or less, 80% by mass or less, 70% by mass or less, 60% by mass or less, 50% by mass or less, 40% by mass or less, 30% by mass or less, 20% by mass or less, or 10% by mass or less.

[0041] In one embodiment, the content of the polysaccharide is 0.05 to 0.5% by mass, based on the total mass of the composition of the present invention. In another embodiment, the content of the polysaccharide is 0.05% by mass or more, 0.10% by mass or more, 0.15% by mass or more, 0.20% by mass or more, 0.25% by mass or more, 0.30% by mass or more, 0.35% by mass or more, 0.40% by mass or more, or 0.45% by mass or more, based on the total mass of the composition of the present invention. In yet another embodiment, the content of the polysaccharide is 0.50% by mass or less, 0.45% by mass or less, 0.40% by mass or less, 0.35% by mass or less, 0.30% by mass or less, 0.25% by mass or less, 0.20% by mass or less, 0.15% by mass or less, or 0.10% by mass or less, based on the total mass of the composition of the present invention.

[0042] The binder component of the composition of the present invention may contain, in addition to the polysaccharide, a binder component of a known paint. Examples of such binder components include acrylic resin emulsions, water-soluble acrylic resins, water-based alkyd resins, water-based urethane resins, polyester resin dispersions, urethane resin dispersions, water-based acrylic urethane resins, fluororesin emulsions, water-soluble fluororesins, polyvinyl alcohol, hydrolyzable silane compounds (e.g., epoxy group-containing silane coupling agents) and hydrolyzed condensates thereof.

[0043] In one embodiment, the binder component other than the polysaccharide is at least one selected from the group consisting of an aqueous alkyd resin, an aqueous urethane resin, a fluororesin emulsion, a water-soluble fluororesin, polyvinyl alcohol, a hydrolyzable silane compound and a hydrolyzed condensate thereof.

[0044] The weight average molecular weight (Mw) of the polysaccharide is, for example, 10,000 to 50,000,000. In one embodiment, the Mw of the polysaccharide is 10,000 or more, 50,000 or more, 100,000 or more, 500,000 or more, 1,000,000 or more, 2,000,000 or more, 3,000,000 or more, 4,000,000 or more, 5,000,000 or more, 10,000,000 or more, 20,000,000 or more, 30,000,000 or more, or 40,000,000 or more. In another embodiment, the Mw of the polysaccharide is 50,000,000 or less, 40,000,000 or less, 30,000,000 or less, 20,000,000 or less, 10,000,000 or less, 5,000,000 or less, 4,000,000 or less, 3,000,000 or less, 2,000,000 or less, 1,000,000 or less, 500,000 or less, 100,000 or less, or 50,000 or less. In yet another embodiment, the Mw of the polysaccharide is 100,000 to 5,000,000. The weight average molecular weight of the polysaccharide is calculated from the measurement results of gel permeation chromatography (GPC) using pullulan as a standard.

[0045] The ratio of the binder component other than polysaccharides in the binder component may be appropriately adjusted, and is, for example, 0 to 95% by mass relative to the total mass of the binder component. In one embodiment, the ratio of the binder component other than polysaccharides in the binder component is 0% by mass or more, 1% by mass or more, 5% by mass or more, 10% by mass or more, 20% by mass or more, 30% by mass or more, 40% by mass or more, 50% by mass or more, 60% by mass or more, 70% by mass or more, 80% by mass or more, or 90% by mass or more relative to the total mass of the binder component. In another embodiment, the ratio of the binder component other than polysaccharides in the binder component is 95% by mass or less, 90% by mass or less, 80% by mass or less, 70% by mass or less, 60% by mass or less, 50% by mass or less, 40% by mass or less, 30% by mass or less, 20% by mass or less, 10% by mass or less, 5% by mass or less, or 1% by mass or less relative to the total mass of the binder component.

[0046] The binder components other than the polysaccharides may be used alone or in combination of two or more.

[0047] In one embodiment, the binder component is only a polysaccharide. In another embodiment, the binder component includes a polysaccharide and a binder component other than the polysaccharide. In yet another embodiment, the binder component includes a polysaccharide and one or more selected from the group consisting of an aqueous alkyd resin, an aqueous urethane resin, a fluororesin emulsion, a water-soluble fluororesin, polyvinyl alcohol, a hydrolyzable silane compound, and a hydrolysis condensate thereof. In yet another embodiment, the binder component is a polysaccharide and one or more selected from the group consisting of an aqueous alkyd resin, an aqueous urethane resin, a fluororesin emulsion, a water-soluble fluororesin, polyvinyl alcohol, a hydrolyzable silane compound, and a hydrolysis condensate thereof.

[0048] The ratio of the binder component in the composition of the present invention is, for example, 0.05 to 2% by mass, based on the total mass of the composition of the present invention. In one embodiment, the ratio of the binder component is 0.05% by mass or more, 0.1% by mass or more, 0.5% by mass or more, 1.0% by mass or more, 1.1% by mass or more, 1.2% by mass or more, 1.3% by mass or more, 1.4% by mass or more, 1.5% by mass or more, 1.6% by mass or more, 1.7% by mass or more, 1.8% by mass or more, or 1.9% by mass or more, based on the total mass of the composition of the present invention. In another embodiment, the ratio of the binder component is 2.0% by mass or less, 1.9% by mass or less, 1.8% by mass or less, 1.7% by mass or less, 1.6% by mass or less, 1.5% by mass or less, 1.4% by mass or less, 1.3% by mass or less, 1.2% by mass or less, 1.1% by mass or less, 1.0% by mass or less, 0.5% by mass or less, or 0.1% by mass or less, based on the total mass of the composition of the present invention.

[0049] ·Copper compounds The copper compound has the function of imparting antiviral properties to the composition of the present invention. The copper compound includes at least one selected from the group consisting of divalent cations of copper compounds, salts of divalent copper ions, and complexes of divalent copper ions. The copper compound may exhibit antibacterial properties in addition to antiviral properties.

[0050] The copper compound that can be used is not particularly limited as long as it is a divalent cation of a copper compound, a salt of a divalent copper ion, or a complex of a divalent copper ion.

[0051] The divalent cation of the copper compound is, for example, [Cu(NH3)4] 2+ , [Cu(H2O)4] 2+ etc.

[0052] Examples of salts of divalent copper ions include copper(II) chloride, copper(II) acetate, copper(II) fluoride, copper(II) bromide, copper(II) iodide, copper(II) sulfide, copper(II) sulfate, copper(II) phosphate, copper(II) carbonate, copper(II) nitrate, copper(II) lactate, copper(II) citrate, copper(II) gluconate, copper(II) formate, copper(II) perchlorate, copper(II) hydroxide, copper(II) cyanide, copper(II) oxalate, and hydrates thereof.

[0053] Complexes of divalent copper ions include, for example, Cl - , C.N. - , O.H. - , C2O4 2- (oxalate ion) and other anionic functional group-containing compounds; and divalent copper complexes with neutral polar molecules having lone pairs of electrons, such as H2O, NH3, CO, and pyridine. In the present invention, the overlapping portion of the divalent copper ion complex with the salt of the divalent copper ion is treated as the divalent copper ion complex.

[0054] In one embodiment, the copper compound is one or more selected from the group consisting of copper(II) chloride, copper(II) acetate, and copper(II) nitrate.

[0055] The form of the copper compound is not particularly limited and can be appropriately selected. For example, the copper compound may be in a solid form such as particles or in a liquid form such as a solution. In one embodiment, the copper compound is water-soluble.

[0056] The divalent cation of the copper compound, the salt of the divalent copper ion, and the complex of the divalent copper ion may each be used alone or in combination of two or more kinds.

[0057] The content of the copper compound in the composition of the present invention may be appropriately adjusted, and is, for example, 0.2 parts by mass or more in terms of the amount of copper element per 100 parts by mass of the binder component of the composition of the present invention. In one embodiment, the content of the copper compound is 0.5 to 100 parts by mass in terms of the amount of copper element per 100 parts by mass of the binder component of the composition of the present invention. In another embodiment, the content of the copper compound is 0.5 parts by mass or more, 1.0 parts by mass or more, 2.0 parts by mass or more, 3.0 parts by mass or more, 4.0 parts by mass or more, 5.0 parts by mass or more, 6.0 parts by mass or more, 7.0 parts by mass or more, 8.0 parts by mass or more, 9.0 parts by mass or more, 10.0 parts by mass or more, 20.0 parts by mass or more, 30.0 parts by mass or more, 40.0 parts by mass or more, 50.0 parts by mass or more, 60.0 parts by mass or more, 70.0 parts by mass or more, 80.0 parts by mass or more, or 90.0 parts by mass or more, in terms of the amount of copper element, per 100 parts by mass of the binder component of the composition of the present invention. In yet another embodiment, the content of the copper compound is 100 parts by weight or less, 90.0 parts by weight or less, 80.0 parts by weight or less, 70.0 parts by weight or less, 60.0 parts by weight or less, 50.0 parts by weight or less, 40.0 parts by weight or less, 30.0 parts by weight or less, 20.0 parts by weight or less, 15.0 parts by weight or less, 10.0 parts by weight or less, 9.0 parts by weight or less, 8.0 parts by weight or less, 7.0 parts by weight or less, 6.0 parts by weight or less, 5.0 parts by weight or less, 4.0 parts by weight or less, 3.0 parts by weight or less, 2.0 parts by weight or less, 1.0 parts by weight or less, or 0.5 parts by weight or less, in terms of elemental copper, per 100 parts by weight of the binder component of the composition of the present invention.

[0058] The copper compound may contain a monovalent copper compound within the scope of the present invention. Examples of the monovalent copper compound include monovalent cations of copper compounds, such as copper chloride (I), copper acetate (I), copper fluoride (I), copper bromide (I), copper iodide (I), copper sulfide (I), copper sulfate (I), copper carbonate (I), copper nitrate (I), copper lactate (I), copper citrate (I), copper hydroxide (I), copper cyanide (I), and hydrates thereof; and complexes of monovalent copper ions.

[0059] When the copper compound contains a monovalent copper compound, the proportion of the monovalent copper compound in the copper compound is, for example, more than 0.000 mass% and 0.005 mass% or less in terms of copper element relative to the total mass of the antiviral aqueous overcoat composition. In one embodiment, the copper compound contains an unavoidable impurity amount of a monovalent copper compound. In another embodiment, the proportion of the monovalent copper compound in the copper compound is more than 0.000 mass% and 0.002 mass% or less in terms of copper element relative to the total mass of the antiviral aqueous overcoat composition.

[0060] In one embodiment of the antiviral aqueous overcoat composition according to the present invention, the content of the polysaccharide is 0.05 to 0.5 mass% relative to the total mass of the antiviral aqueous overcoat composition, and the content of the copper compound is 0.5 to 100 parts by mass in terms of elemental copper relative to 100 parts by mass of the binder component.

[0061] The total mass of the solid content relative to the total mass of the composition of the present invention is 0.01 to 5.00% by mass. In one embodiment, the total mass of the solid content relative to the total mass of the composition of the present invention is 0.01% by mass or more, 0.05% by mass or more, 0.10% by mass or more, 0.20% by mass or more, 0.30% by mass or more, 0.40% by mass or more, 0.50% by mass or more, 1.00% by mass or more, 1.50% by mass or more, 2.00% by mass or more, 2.50% by mass or more, 3.00% by mass or more, 3.50% by mass or more, 4.00% by mass or more, or 4.50% by mass or more. In another embodiment, the total mass of the solid content relative to the total mass of the composition of the present invention is 5.00 mass% or less, 4.50 mass% or less, 4.00 mass% or less, 3.50 mass% or less, 3.00 mass% or less, 2.50 mass% or less, 2.00 mass% or less, 1.50 mass% or less, 1.00 mass% or less, 0.90 mass% or less, 0.80 mass% or less, 0.70 mass% or less, 0.60 mass% or less, 0.50 mass% or less, 0.10 mass% or less, or 0.05 mass% or less. In yet another embodiment, the total mass of the solid content relative to the total mass of the composition of the present invention is 0.21 to 2.39 mass%.

[0062] ·water The water is not particularly limited, and any known water can be used, including, for example, distilled water, deionized water, tap water, and purified water.

[0063] The content of water may be appropriately adjusted, and is, for example, 60 to 99.8% by mass relative to the total mass of the composition of the present invention. In one embodiment, the content of water is 60% by mass or more, 70% by mass or more, 75% by mass or more, 80% by mass or more, 85% by mass or more, 90% by mass or more, 95% by mass or more, or 99% by mass or more relative to the total mass of the composition of the present invention. In another embodiment, the content of water is 99% by mass or less, 95% by mass or less, 90% by mass or less, 85% by mass or less, 80% by mass or less, 75% by mass or less, or 70% by mass or less relative to the total mass of the composition of the present invention.

[0064] Other Ingredients The composition of the present invention may contain additives used in coating compositions in addition to the above-mentioned essential components. Examples of optional other components include surfactants, curing agents, organic solvents (excluding plasticizers), pigments, thickeners, ultraviolet ray absorbing agents, light stabilizers, dispersants, defoamers, preservatives, plasticizers, etc. The other components may be used alone or in combination of two or more.

[0065] The composition of the present invention can form a coating film having antiviral properties and excellent appearance without dripping even if it does not contain a silver compound or photocatalytic titanium oxide, which are conventional antiviral agents, but may contain a silver compound or photocatalytic titanium oxide, which are conventional antiviral agents, within the scope of the present invention. In one embodiment, the composition of the present invention does not contain a silver compound or photocatalytic titanium oxide as an antiviral agent. In another embodiment, the composition of the present invention may contain a silver compound as an unavoidable impurity. In yet another embodiment, the composition of the present invention has an amount of a silver compound as an antiviral agent less than 0.001 parts by mass relative to the total mass of the composition. In yet another embodiment, the composition of the present invention has an amount of a photocatalytic titanium oxide as an antiviral agent less than 0.001 parts by mass relative to the total mass of the composition.

[0066] Surfactants The surfactant may be appropriately selected from known surfactants such as anionic surfactants, cationic surfactants, amphoteric surfactants, and nonionic surfactants.

[0067] Examples of the anionic surfactant include carboxylic acid type surfactants, sulfate ester type surfactants, sulfonic acid type surfactants, and phosphate ester type surfactants.

[0068] Examples of the cationic surfactant include quaternary ammonium salt surfactants and alkylamine salt surfactants.

[0069] Examples of the amphoteric surfactant include amino acid type amphoteric surfactants; aminoacetic acid betaine type amphoteric surfactants; sulfobetaine type amphoteric surfactants; and imidazoline type amphoteric surfactants.

[0070] Examples of nonionic surfactants include polyoxyalkylene fatty acid ester surfactants, acetylene surfactants, vinyl polymer surfactants, silicon surfactants, fluorine surfactants, alkylglycoside surfactants, and higher alcohols. In addition, examples of nonionic surfactants include those described in JP 2017-165833 A. Examples of acetylene surfactants include acetylene glycol surfactants and acetylene alcohol surfactants.

[0071] From the viewpoint of coating workability and quick and uniform wetting and spreading, it is preferable that the surface tension of an aqueous solution of the surfactant at a concentration of 0.1% by mass is 30 mN / m or less. For example, the surface tension of an aqueous solution of the surfactant at a concentration of 0.1% by mass is 20 to 30 mN / m.

[0072] In one embodiment, the surfactant is a non-ionic surfactant, hi another embodiment, the surfactant is an acetylenic surfactant.

[0073] When a surfactant is used, the content of the surfactant may be appropriately adjusted, and is, for example, 0.05 to 5% by mass relative to the total mass of the composition of the present invention.

[0074] Hardener The curing agent can be appropriately selected from known curing agents used in coating compositions, such as amino resins, blocked isocyanate resins, epoxy compounds, aziridine compounds, carbodiimide compounds, and oxazoline compounds.

[0075] When a curing agent is used, the content of the curing agent may be appropriately adjusted, and is, for example, 1 to 20 parts by mass in terms of solid content per 100 parts by mass of the total solid content of the binder component.

[0076] Organic solvents The composition of the present invention may contain an organic solvent within the scope of the present invention. In the present invention, the organic solvent refers to a solvent having a boiling point of less than 250°C. Substances having a boiling point of 250°C or more are treated as plasticizers. Examples of organic solvents include alcohols such as methanol, ethanol, 1-propanol, and 2-propanol; ethylene glycol; acetone; tetrahydrofuran; and acetonitrile.

[0077] When a mixture of water and an organic solvent is used, the ratio of water to the total mass of the mixture is, for example, 50 to 99% by mass. In one embodiment, when a mixture of water and an organic solvent is used, the ratio of water to the total mass of the mixture is 70% by mass or more, 80% by mass or more, 90% by mass or more, or 95% by mass or more. In another embodiment, when a mixture of water and an organic solvent is used, the ratio of water to the total mass of the mixture is 99% by mass or less, 95% by mass or less, 90% by mass or less, or 80% by mass or less.

[0078] The organic solvent may be used alone or in combination of two or more kinds.

[0079] The pH of the composition of the present invention may be appropriately adjusted, and is, for example, 4.0 to 9.0. In one embodiment, the pH of the composition of the present invention is 4.0 or more, 5.0 or more, 6.0 or more, 7.0 or more, or 8.0 or more. In another embodiment, the pH of the composition of the present invention is 9.0 or less, 8.0 or less, 7.0 or less, 6.0 or less, or 5.0 or less.

[0080] The composition of the present invention may be a clear paint or an enamel paint. In one embodiment, the composition of the present invention is a clear paint.

[0081] ·Applications The use of the composition of the present invention is not particularly limited as long as it is an application requiring antiviral properties, and it can be particularly suitably used in applications requiring antiviral properties and excellent coating film appearance. The use of the composition of the present invention includes exterior and interior surfaces of buildings or structures such as detached houses, collective housing such as apartments, office buildings, public facilities, commercial facilities, research facilities, military facilities, tunnels, etc., such as walls, floors, ceilings, roofs, pillars, signs, electronic signs (digital signage), doors, gates; exterior and interior surfaces of vehicles such as automobiles, trains, buses, and taxis; vehicle tires; exterior and interior surfaces of ships; exterior and interior surfaces of aircraft such as airplanes and helicopters; bridges; vending machines; road signs; traffic lights; street lights; LED-type, liquid crystal-type, and light bulb-type electronic bulletin boards; work machines, construction machines; stone monuments; rain gear such as umbrellas and raincoats; packaging materials; lenses such as glasses; mirrors, etc. In one embodiment, the use of the composition of the present invention is interior use.

[0082] The object to which the composition of the present invention is applied, i.e., the substrate, is not particularly limited and examples thereof include the interior and exterior of buildings; the interior and exterior of vehicles such as automobiles and trains; the interior and exterior of aircraft; toilets, doorknobs, buttons, handrails, shopping baskets, faucet handles or levers, tables, desks, chairs, keyboards, touch panels, smartphones, tablet computers, remote controls, microphones, toys; home appliances such as refrigerators, air conditioners, and air purifiers, and filters for air conditioners or air purifiers; medical equipment, and partitions for preventing droplet infection such as acrylic panels.

[0083] Method for preparing an antiviral aqueous overcoat composition The method for preparing the composition of the present invention is not particularly limited, and the composition can be prepared by mixing and stirring the binder component, copper compound, water, and optionally other components in any order.

[0084] The composition of the present invention can be applied by a conventional coating method to form a coating film.

[0085] The amount of the composition of the present invention applied is, for example, 5 to 30 g / m 2 Alternatively, the composition of the present invention may be applied so that the dry coating thickness is 5 nm to 1 μm. The lower limit has been changed to 5g, 5nm.

[0086] The temperature for drying the liquid film or uncured film of the composition of the present invention is, for example, 0 to 50° C., and the time is, for example, 5 minutes to 24 hours.

[0087] The coating means of the composition of the present invention is not particularly limited and may be appropriately selected from known coating means. Examples of coating means include rollers, sprays, brushes, trowels, applicators, bar coaters, roll coaters, curtain coaters, paint baths, and the like. In one embodiment, the coating means of the composition of the present invention is one or more selected from the group consisting of rollers, brushes, trowels, and sprays. In another embodiment, the composition of the present invention is for roller coating, brush coating, trowel coating, or spray coating. The trowel is a coating tool in which a pad part for impregnating paint and a handle part are connected.

[0088] In one embodiment, the coating using the composition of the present invention is an overcoat film, while in another embodiment, the coating using the composition of the present invention is a coating located on the outermost side or air interface side of a substrate.

[0089] (Goods) The article according to the present invention is an article having a dried coating film of any of the above-mentioned anti-viral aqueous overcoat compositions on at least a portion of the surface of a substrate.

[0090] The substrate may be similar to those described above. In one embodiment, the substrate is an interior of a building.

[0091] The composition of the present invention applied to a substrate may be different for each portion of the substrate, for example, a portion of the substrate surface may contain a pigment, and another portion of the substrate may contain no pigment.

[0092] The thickness of the dry coating film of the composition of the present invention is, for example, 5 nm to 1 μm. Alternatively, the weight of the dry coating film of the composition of the present invention is, for example, 0.005 to 1 g / m 2 It is.

[0093] Examples of articles having a dried coating film of the composition of the present invention include the interior and exterior of buildings; the interior and exterior of vehicles such as automobiles and trains; the interior and exterior of aircraft; toilets, doorknobs, buttons, handrails, shopping baskets, faucet handles or levers, tables, desks, chairs, keyboards, touch panels, smartphones, tablet computers, remote controls, microphones, toys; home appliances such as refrigerators, air conditioners, and air purifiers, filters for air conditioners or air purifiers, medical equipment, and partitions for preventing droplet infection such as acrylic panels. EXAMPLES

[0094] The present invention will be described in more detail below by way of examples. However, these examples are intended to illustrate the present invention and are not intended to limit the present invention in any way.

[0095] The materials used in the examples are as follows: ·Polysaccharide Xanthan gum: "Gum Crystal" manufactured by Kankosha, contains carboxyl groups, 100% solids Cellulose nanofiber 1: Trade name "LeoCrysta I-2SX" manufactured by Daiichi Kogyo Seiyaku Co., Ltd., containing carboxyl groups, solid content 2% by mass, indicated as "CN1" in the table Cellulose nanofiber 2: Daiichi Kogyo Seiyaku Co., Ltd. product name "LeoCrysta I-2AX", containing carboxyl groups, solid content 2% by mass, indicated as "CN2" in the table Diutan gum: Sansho's product name "KELCO-VIS DG", containing carboxyl groups, solid content 100% by mass Cationic cellulose: Lion Specialty Chemicals' trade name "Leoguard MGP", O-[2-hydroxy-3(-trimethylammonio)propyl]hydroxyethyl cellulose chloride, containing quaternary ammonium groups, solid content 100% by mass Binder components other than polysaccharides Water-based fluorine emulsion: AGC's product name "Lumiflon (registered trademark) FE4300", solid content 50% by mass, indicated as "FE4300" in the table. Water-based alkyd resin: Trade name "WATERSOL (registered trademark) S-311" manufactured by DIC Corporation, solid content 50% by mass, indicated as "S-311" in the table Polyvinyl alcohol: Mitsubishi Chemical Corporation's product name "GOHSENEX (registered trademark) Z-200", solid content 100% by mass, indicated as "Z-200" in the table Silane coupling agent: Trade name "KBM-403" manufactured by Shin-Etsu Chemical Co., Ltd., solid content 100% by mass, indicated as "KBM-403" in the table Water-based polyurethane resin: Arakawa Chemical Industries Co., Ltd.'s product name "Yuliano W600", solid content 35% by mass, indicated as "W600" in the table Comparative binder component: Rohm and Haas Japan's product name "Primal TT-615", acrylic polymer, carboxyl group-containing, solid content 30% by mass, indicated as "TT-615" in the table Copper compounds (antiviral agents) Copper compound 1: Copper (II) acetate monohydrate, Fujifilm Wako Pure Chemical Industries, Ltd., Wako special grade, content 99.0% or more, indicated as "copper acetate" in the table Copper compound 2: Copper(II) chloride dihydrate, Fujifilm Wako Pure Chemical Industries, Ltd., special grade reagent, referred to as "copper chloride" in the table. Copper compound 3: Copper (II) nitrate trihydrate, Fujifilm Wako Pure Chemical Industries, Wako special grade, content 99.0% or more, indicated as "copper nitrate" in the table Comparative antiviral agent Silver compound 1: Silver acetate, Fujifilm Wako Pure Chemical Industries, content 99.0% or more, indicated as "silver acetate" in the table Silver compound 2: Trade name "AG Alpha (registered trademark) CF-01" by J-Chemical Co., Ltd., aqueous silver-based antibacterial and antiviral processing agent, silver ion concentration 2.5%, solid content 14.3%, indicated as "CF-01" in the table. Silver compound 3: Zeomic HD10N (silver-supported zeolite), manufactured by Sinanen Zeomic Co., Ltd., particle size 1.5 μm, solid content 100%, indicated as "HD10N" in the table. Photocatalytic titanium dioxide: Nanowave's product name "Half Metal HM-20AF", visible light responsive apatite-coated titanium dioxide, referred to as "HM-20AF" in the table. Plasticizers Tripropylene glycol n-butyl ether, trade name "Dalpad (registered trademark) C" manufactured by Dow Chemical Japan, active ingredient 100% by mass, boiling point 274°C, indicated as "Dalpad C" in the table Hardener "Carbodilite SV-02" (product name, manufactured by Nisshinbo Chemical Co., Ltd.), solid content 40% by mass, indicated as "SV-02" in the table Surfactants Product name: "Olfine (registered trademark) EXP.4200" manufactured by Nissin Chemical Industry Co., Ltd., active ingredient 75% by mass, indicated as "EXP4200" in the table

[0096] Other materials used in the examples are as follows: Sealer composition: Water-based cationic epoxy composite undercoat material, product name "Water-based Cationic Sealer" manufactured by Nippon Paint Co., Ltd. Black paint composition: Water-based paint, Nippon Paint's product name "Odecoat G Eco", black, 30% gloss White paint composition: Water-based paint, Nippon Paint's product name "Odecoat G Eco", white, 30% gloss Roller 1: "Urethane-kun (registered trademark) Small Roller" manufactured by Otsuka Brush Manufacturing Co., Ltd., bristle length 6 mm Roller 2: "Small Roller B" manufactured by Otsuka Brush Manufacturing Co., Ltd., bristle length 13 mm Brush: Product name "Water-based, cross-shaped, No. 15" manufactured by Otsuka Brush Manufacturing Co., Ltd. Brush: Product name "Kotebake PRO Set" manufactured by Otsuka Brush Manufacturing Co., Ltd. Spray: Anest Iwata's product name "Hand Spray Gun W-101" Substrate Pw: White wallpaper, product name "TH30250" manufactured by Sangetsu Co., Ltd. Coating material Pb: Black wallpaper, product name "TH30918" manufactured by Sangetsu Co., Ltd.

[0097] Preparation of antiviral aqueous overcoat composition Example 1 1000 parts by mass of ion-exchanged water was placed in a 4 L beaker. Next, while stirring the water, each component in the solid content shown in Table 1 was added to the container. The pH of the resulting mixture was adjusted to the pH value shown in Table 1 using sodium hydroxide and acetic acid to prepare an anti-viral aqueous overcoat composition.

[0098] (Examples 2 to 19) Examples 2 to 16 were prepared in the same manner as Example 1, except that the components and solid contents were changed to those shown in Table 1. Examples 17 to 19 used the same antiviral aqueous overcoat composition as Example 1.

[0099] (Comparative Examples 1 to 13) Comparative compositions were prepared in the same manner as in Example 1, except that the components and solid contents were changed as shown in Table 2.

[0100] ·Preparation of the object to be painted The sealer composition was applied to a slate board (dimensions: 90 cm x 45 cm) using roller 1 and dried at room temperature (23°C, same below) for 12 hours to form an undercoat coating film. Next, the black paint composition was applied onto the undercoat coating using roller 2 and dried at room temperature for 12 hours to form a deep black, 30% gloss coating film, obtaining coated object B1.

[0101] In preparing the object B1, except that the slate board was changed to a slate board measuring 5 x 5 cm, a primer coating film and a deep black, 30% gloss coating film were formed on the slate board in the same manner, to obtain the object B2.

[0102] In the preparation of the substrate B1, except that the black paint composition was changed to a white paint composition, a primer coating film and a pale white, 30% gloss coating film were formed on a slate board in the same manner, and the substrate W was obtained.

[0103] Next, the prepared compositions of the Examples or Comparative Examples were applied to each substrate to form a coating film of the present invention or a comparative coating film, and the sagging suppression, appearance of the coating film, and antiviral properties of the coating film were evaluated as follows. The results are shown in Tables 1 and 2. In Tables 1 and 2, the coating method R stands for roller coating, B for brush coating, T for trowel coating, and S for spray coating.

[0104] (Sagging prevention) The object to be coated B1 was placed approximately perpendicular to the floor. The composition of the example or comparative example was applied to the object to be coated B1 at a concentration of 20 parts by mass / m 2 Immediately after painting, the paint was visually observed for dripping, and drip-prevention properties were evaluated according to the following criteria. Pass: No paint dripping observed Failed: Paint dripping was observed

[0105] (Appearance of the coating) Vertically oriented substrates B1, W, Pw and Pb were coated with a dry coating weight of 0.02 to 1.32 g / m 2The composition of the Example or Comparative Example was applied so that the coating film was formed. The coated substrate was dried at room temperature for 12 hours to form a coating film of the present invention or a comparative coating film. The substrate was visually observed, and the appearance of the coating film was evaluated according to the following criteria. Evaluations A and B are acceptable. However, Comparative Examples 3 and 9 failed the evaluation of sagging suppression, and a normal coating film could not be formed, so the appearance of the coating film was not evaluated. Appearance of the overcoat film on the coated object B1 and Pb A: No white unevenness is observed B: Slight white unevenness was observed C: Many white spots were observed Appearance of the overcoat film on the coated objects W and Pw A: No discoloration is observed B: Slight discoloration was observed C: Many discolorations were observed

[0106] (Anti-viral properties of coating film) The object to be coated B2 was placed on a horizontal table. The composition of the example or comparative example was applied to the object to be coated B2 at 20 parts by mass / m using a roller 1. 2 The amount of the coating was 100g. The coated object B2 was dried at room temperature for 12 hours to form a coating film of the present invention or a comparative coating film on the object B2. The antiviral activity value was determined using the object B2 according to the method described in JIS R 1756 (bacteriophage Qβ), and the antiviral properties of the coating film were evaluated according to the following criteria. However, Comparative Examples 3 and 9 failed the evaluation of sagging suppression and were not able to form a normal coating film, so the antiviral properties of the coating film were not evaluated. Pass: Antiviral activity value is 2 or higher Fail: Antiviral activity value is less than 2

[0107] [Table 1] *1: As copper element content

[0108] [Table 2] *1: As copper element content *2: As elemental silver content

[0109] As shown in Tables 1 and 2, the present invention provides an anti-viral aqueous overcoat composition that is capable of forming a coating film with excellent appearance without dripping, even when applied onto an interior coating film using a roller, brush, trowel, or spray. [Industrial Applicability]

[0110] According to the present invention, it is possible to provide an antiviral aqueous overcoat composition that can form a coating film with excellent appearance without dripping even when applied to an interior coating film using a roller, brush, trowel, or spray. Also, according to the present invention, it is possible to provide an article that has antiviral properties and a coating film with excellent appearance.

Claims

1. An antiviral aqueous overcoat composition comprising a binder component, a copper compound and water, The binder component includes a polysaccharide, The copper compound includes at least one selected from the group consisting of a divalent cation of a copper compound, a salt of a divalent copper ion, and a complex of a divalent copper ion; An anti-viral aqueous overcoat composition, wherein a total mass of solid contents relative to a total mass of the anti-viral aqueous overcoat composition is 0.01 to 5 mass%.

2. 2. The anti-viral aqueous overcoat composition of claim 1, wherein the polysaccharide has a carboxyl group, a carboxylalkyl group, a sulfonic acid group, a phosphoric acid group, an amino group, an acetamide group, or a quaternary ammonium group.

3. 3. The anti-viral aqueous overcoat composition according to claim 1, wherein the polysaccharide is at least one selected from the group consisting of xanthan gum, cellulose nanofiber, diutan gum, guar gum, carboxymethyl cellulose, hydroxymethyl cellulose, and anionic functional group-containing derivatives thereof, cationic cellulose, chitin nanofiber, and chitosan nanofiber.

4. the content of the polysaccharide is 0.05 to 0.5% by mass based on the total mass of the antiviral aqueous overcoat composition; 4. The anti-viral aqueous overcoat composition according to claim 1, wherein a content of the copper compound is 0.5 to 100 parts by mass in terms of an amount of copper element per 100 parts by mass of the binder component.

5. 5. The anti-viral aqueous overcoat composition according to claim 1, wherein the water content is 60 to 99.8% by mass, based on the total mass of the anti-viral aqueous overcoat composition.

6. The anti-viral aqueous overcoat composition according to any one of claims 1 to 5, which is for roller coating, brush coating, trowel coating, or spray coating.

7. An article having a dried coating film of the anti-viral aqueous overcoat composition according to any one of claims 1 to 6 on at least a part of the surface of the article.

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