Makeup methods

Abstract

This invention provides a decorative method that allows for the formation of a beautiful new coating on an existing wall surface with an uneven pattern and a highly durable existing coating, and that maintains the finished appearance for a long period of time. [Solution] The present invention relates to a method for decorating an existing wall surface that has deteriorated over time, wherein the existing wall surface has an uneven surface pattern and is equipped with at least one existing coating selected from an inorganic coating, an organic-inorganic composite coating, and a fluororesin coating, and is characterized by applying a primer to the existing wall surface that forms a coating with a different color tone and / or gloss level from the existing wall surface, and then applying a topcoat after the coating has dried.

Description

[Technical Field]

[0001] This invention relates to a decorative method applicable to buildings and the like. [Background technology]

[0002] Traditionally, concrete, mortar, and various types of panel-shaped wall materials have been used for the walls of buildings and other structures. Among these, for example, many panel-shaped wall materials have a textured surface to give them a three-dimensional appearance, and are coated for protection and aesthetic purposes. From the viewpoint of extending lifespan and reducing maintenance, materials that can form highly durable coatings such as inorganic coatings, organic-inorganic composite coatings, and fluororesin coatings are preferred for such coatings.

[0003] Walls constructed with such panel-like wall materials are exposed to the outdoors for extended periods. As a result, the surface of the panel-like wall materials deteriorates due to the effects of sunlight, rain, dust, etc., and the initial aesthetic appeal of the panel-like wall materials diminishes over time. Even with wall surfaces equipped with highly durable coatings, deterioration and a decline in aesthetic appeal over time are difficult to avoid.

[0004] Japanese Patent Publication No. 2016-117795 describes applying a primer containing epoxy resin, amine compound, silane coupling agent, etc., to a coating such as acrylic silicone resin. The patent publication shows that such a primer exhibits good adhesion to highly durable coatings such as acrylic silicone resin. [Prior art documents] [Patent Documents]

[0005] [Patent Document 1] Japanese Patent Publication No. 2016-117795 [Overview of the project] [Problems that the invention aims to solve]

[0006] However, even if the deteriorated surface such as a plate-shaped wall material having a concavo-convex pattern is decorated using the method of the above patent document, there is a risk of swelling, peeling, etc. over time, and it is difficult to obtain practically satisfactory results.

[0007] The present invention has been made in view of the above problems, and an object thereof is to provide a decorative method capable of forming a beautiful new coating on an existing wall surface having a concavo-convex pattern and provided with a highly durable existing coating, and maintaining the finished state thereof over a long period of time.

Means for Solving the Problems

[0008] As a result of intensive studies to achieve the above object, the present inventor has come up with a method of sequentially applying a specific undercoat material and a topcoat material to the existing wall surface as described above, and has completed the present invention.

[0009] That is, the present invention has the following features. 1. A method for decorating an existing wall surface that has deteriorated over time, where the existing wall surface has a concavo-convex pattern on its surface, Existing inorganic coatings and is provided with, to the existing wall surface, an undercoat material that forms a coating having a different color tone and / or glossiness from that of the existing wall surface is applied, The above primer is, It contains coloring pigments and / or extender pigments, with a pigment volume concentration of 3-30%. The non-volatile content is 45-90% by weight. This is a non-aqueous primer containing a non-aqueous solvent with an aniline point of 12 to 70°C. After the coating is dried, a topcoat material is applied, which is a decorative method characterized by this. 2. The decorative method according to 1., wherein the existing wall surface has a concavo-convex pattern on its surface and is composed of a plurality of plate-shaped wall materials provided with an existing coating. 3. The above primer further contains resin components and thickeners. The cosmetic method according to 1, characterized in that the amount of thickener mixed (solid content) is 0.1 to 10 parts by weight per 100 parts by weight of the solid content of the resin component. 4. The cosmetic method according to 3, characterized in that the above-mentioned primer contains 10 to 200 parts by weight of the above-mentioned extender pigment per 100 parts by weight of the solid content of the resin component. 5. The cosmetic method according to 1, characterized in that the inorganic coating is a coating containing an inorganic binder selected from silicone resin, alkoxysilane, colloidal silica, and silicate. 6. The cosmetic method according to 1, characterized in that the inorganic coating is a clear coating. 7. The cosmetic method according to 1, characterized in that the resin component in the above-mentioned primer includes an epoxy resin, a polyamine compound, and a compound having a reactive silyl group. 8. The cosmetic method according to 1, characterized in that the resin component in the primer contains a polyol compound, a polyisocyanate compound, and a compound having a reactive silyl group. 9. The cosmetic method according to 1, characterized in that the above-mentioned primer contains a compound having a reactive silyl group as a resin component. [Effects of the Invention]

[0010] According to the present invention, a beautiful new coating can be formed on an existing wall surface that has an uneven pattern and an existing coating, and the finished state can be maintained for a long period of time. [Modes for carrying out the invention]

[0011] The following describes embodiments for carrying out the present invention.

[0012] The present invention can be applied to existing wall surfaces of buildings, civil engineering structures, etc. Such existing wall surfaces consist of at least a base material and an existing coating. Examples of base materials include concrete, mortar, metal, wood, glass, etc., or various plate-shaped wall materials. Among these, examples of plate-shaped wall materials include inorganic hardened bodies mainly composed of cement, calcium silicate, lime, gypsum, etc. Specific examples of such plate-shaped wall materials include cement boards, extruded boards, slate boards, PC boards, ALC boards, fiber-reinforced cement boards, siding boards, ceramic boards, calcium silicate boards, gypsum boards, hard wood chip cement boards, etc.

[0013] This invention focuses on existing wall surfaces having an uneven or textured pattern on their surface. Examples of uneven or textured patterns on existing wall surfaces include tile-like patterns, brick-like patterns, geometric patterns, stripe patterns, grid patterns, polka dot patterns, sand-textured patterns, orange peel patterns, ripple patterns, and other graphic patterns depicting animals or plants. Specifically, when viewed from the front, the shape of the protrusions in the uneven pattern can be, for example, square, rectangular, circular, elliptical, triangular, rhombus, polygonal, or irregular. The cross-sectional shape of the protrusions in the uneven pattern can be, for example, trapezoidal, square, rectangular, semicircular, wavy, stepped, triangular, or mountain-shaped. Examples of recesses in the uneven pattern can be flat and form joints. The height difference between the recesses and protrusions may be constant or vary in each area, but is preferably 20 mm or less, more preferably 1 to 15 mm. Such uneven or textured patterns can be applied to either the substrate, the existing coating, or both.

[0014] In the existing wall surface of the present invention, at least one existing coating (hereinafter also referred to as "high-durability existing coating") selected from inorganic coatings, organic-inorganic composite coatings, and fluororesin coatings is provided on the surface of the substrate. This existing coating is a variety of high-durability coatings that have already been applied to the substrate by on-site painting or factory painting (line painting), etc. Examples of such existing coatings include colored coatings (enamel coatings, printed coatings, etc.), clear coatings, or laminated coatings thereof, and are coatings formed by applying and curing various coating materials to the substrate. Such coating materials may be any of the following: room temperature drying type, room temperature curing type, bake curing type, ultraviolet (UV) curing type, electron beam curing type, etc.

[0015] Examples of binders for such coating materials include inorganic binders such as silicon resin, alkoxysilane, colloidal silica, and silicates; organic-inorganic composite binders such as acrylic silicon resin; and fluororesins.

[0016] The present invention is particularly suitable when the existing coating on the outermost surface is one or more selected from inorganic coatings (coatings containing the above-mentioned inorganic binder), organic-inorganic composite coatings (coatings containing the above-mentioned organic-inorganic composite binder), fluororesin coatings (coatings containing the above-mentioned fluororesin), etc., and is more suitable for application to these clear coatings. Such existing coatings may contain photocatalytic titanium oxide or the like.

[0017] The present invention can be applied as a renovation method when existing wall surfaces deteriorate over time, as described above. The degree of deterioration is not particularly limited, but wall surfaces that have been used for approximately 5 years or more (and even 8 years or more) can be targeted by the present invention.

[0018] The existing wall surface of the present invention is preferably one composed of multiple plate-like wall materials having an uneven surface pattern and a highly durable existing coating, which are arranged side by side. The present invention can obtain advantageous effects when applied to an existing wall surface composed of such multiple plate-like wall materials. It is desirable that the uneven surface pattern be applied to at least the plate-like wall material itself. Sealing material or dry joint material may be filled in the connecting parts between the plate-like wall materials.

[0019] The present invention's decorative method involves applying (painting) a primer and a topcoat in sequence to an existing wall surface that has deteriorated over time as described above.

[0020] In this invention, a primer is used as the undercoat material, which forms a film with a different color tone and / or gloss level from the existing wall surface. In this invention, by using such a primer, it can be confirmed that the primer film is evenly formed along the unevenness of the existing wall surface, including the entire uneven pattern of the existing wall surface, that is, the recesses, protrusions, and even the boundaries between the recesses and protrusions of the uneven pattern. After that, by applying a topcoat material, a beautiful new film can be formed while making use of the uneven pattern of the existing wall surface, and the finished state can be maintained for a long period of time.

[0021] The primer for forming a film with a different color tone from the existing wall surface only needs to be such that the color tone of the film (primer film) formed after applying the primer can be visually recognized as different from the color tone of the existing wall surface. As such a primer, those with a color difference (ΔE) of 3 or more between the existing wall surface and the primer film are preferred, those with a color difference of 5 or more are more preferred, and those with a color difference of 10 or more are even more preferred. For an existing wall surface with a plurality of regions with different color tones mixed therein (for example, a spotted pattern, a lattice pattern, etc.), it is only necessary that the color tone of the primer film is different from the color tone of the region occupying the largest area among those regions.

[0022] The color difference (ΔE) is a value measured using a color difference meter for colors. Specifically, the L * value, a * value, and b * value (average value of 10 measurement points) can be calculated by the following formula. The L * value, a * value, and b * value of the primer film may be measured for the primer film formed on the existing wall surface. <Formula> ΔE = { (L * 2 - L * 1) 2 + (a * 2 - a * 1) 2 + (b * 2 - b * 1) 2} 0.5 (In the formula, L * 1, a * 1, b * 1 are respectively the L * , a * , b * of the existing wall surface. L * 2, a * 2, b * 2 are respectively the L * , a * , b * of the primer film.)

[0023] Such primers can include, for example, those containing resin components and colorants. Among these, colorants can include, for example, colored pigments and dyes. Examples of colored pigments include titanium dioxide, zinc oxide, carbon black, graphite, black iron oxide, iron-chromium composite oxide, manganese-bismuth composite oxide, manganese-yttrium composite oxide, iron-manganese composite oxide, iron-copper-manganese composite oxide, iron-chromium-cobalt composite oxide, copper-chromium composite oxide, copper-manganese-chromium composite oxide, red iron oxide, molybdate orange, permanent red, permanent carmine, anthraquinone red, perylene red, quinacridone red, yellow iron oxide, titanium yellow, first yellow, benzoimidazolone yellow, chromium green, cobalt green, phthalocyanine green, ultramarine, navy blue, cobalt blue, phthalocyanine blue, quinacridone violet, dioxazine violet, metallic pigments, and pearl pigments. Examples of dyes include acid dyes, basic dyes, cationic dyes, direct dyes, soluble vat dyes, acid mordant dyes, alcohol bath dyes, and reactive dyes. By using one or more of these colorants as appropriate, the undercoat material can be colored to a desired shade. The amount of colorant mixed in the undercoat material is preferably 1 to 500 parts by weight, more preferably 5 to 200 parts by weight, and even more preferably 10 to 150 parts by weight, per 100 parts by weight of the solid content of the resin component.

[0024] A primer that forms a film with a different gloss level from the existing wall surface is acceptable as long as the difference in gloss level of the film (primer film) is visually apparent. For such a primer, it is preferable that the difference in gloss level between the existing wall surface and the primer film is 5 or more, more preferably 10 or more, and even more preferably 15 or more. In the case of an existing wall surface with multiple areas of different gloss levels, it is sufficient that the gloss level of the primer film differs from that of the area occupying the largest surface area.

[0025] Glossiness is a value measured using a gloss meter. Specifically, it can be determined from the 60-degree specular gloss (average value of 10 measurement points) of both the existing wall surface and the primer coating. Note that the glossiness of the primer coating should be measured on the primer coating formed on the existing wall surface.

[0026] Such primers can include, for example, resin components and, if necessary, a matting agent. The gloss level of the primer film can be set by adjusting, for example, the type and ratio of resin components. The gloss level can also be adjusted by compounding two or more types of resins. If the primer contains a matting agent, the gloss level can be set by adjusting the type and ratio of the matting agent.

[0027] Examples of matting agents that can be used include extender pigments, specifically heavy calcium carbonate, light calcium carbonate, clay, kaolin, talc, barium carbonate, white carbon, diatomaceous earth, granite, pottery clay, china clay, barite powder, barium sulfate, precipitated barium sulfate, silica sand, silica powder, quartz powder, resin beads, glass beads, hollow balloons, zeolite, sodium sulfate, alumina, allophane, vermiculite, perlite, Oya stone powder, activated clay, charcoal, activated carbon, wood powder, shirasu balloons, etc. These can be used individually or in combination of two or more.

[0028] When the primer contains a matting agent, the amount of matting agent to be mixed is preferably 10 to 200 parts by weight, preferably 20 to 120 parts by weight, and more preferably 35 to 95 parts by weight, per 100 parts by weight of the solid content of the resin component. If the amount of matting agent mixed is within this range, in addition to the gloss adjustment effect, the effect of forming a uniform primer film on the surface of the uneven pattern is further enhanced, and it becomes easier to form a primer film while making use of the uneven pattern, which is preferable.

[0029] When the primer contains pigments such as coloring pigments and / or extender pigments, the volume concentration of the pigment in the primer is preferably 1 to 30%, more preferably 3 to 25%, even more preferably 5 to 23%, and particularly preferably 8 to 20%. By having the pigment volume concentration within the above range, it is possible to enhance the effect of forming a primer film with excellent adhesion while preserving the shape of the substrate. The pigment volume concentration is the volume percentage of the pigment contained in the dry coating film, and is a value that can be calculated from the weight parts and specific gravity of the resin component and pigment that constitute the primer. The specific gravity of the resin component is assumed to be 1.

[0030] As resin components in the primer, for example, water-soluble resins such as water-soluble resins and water-dispersible resins, non-water-based resins such as solvent-soluble resins and non-water-dispersible resins, or solvent-free resins can be used.

[0031] In this case, if a water-based resin is used as the resin component, a water-based primer can be obtained. The water-based primer contains water as a medium and may further contain a water-soluble solvent such as a lower alcohol, polyhydric alcohol, ether compound, ester compound, or alkylene oxide-containing compound, as needed.

[0032] When a non-aqueous resin is used as the resin component, a non-aqueous primer can be obtained. A non-aqueous primer contains a non-aqueous solvent as a medium. Examples of non-aqueous solvents include aliphatic hydrocarbon solvents such as n-heptane, n-hexane, n-pentane, n-octane, n-nonane, n-decane, n-undecane, and n-dodecane; alicyclic hydrocarbon solvents such as methylcyclohexane and ethylcyclohexane; aliphatic hydrocarbon-containing mixed solvents such as mineral spirits; petroleum-based solvents such as petroleum ether, petroleum naphtha, solvent naphtha, and kerosene; as well as isoparaffinic solvents, alcohol-based solvents, ether-alcohol-based solvents, ether-based solvents, ester-based solvents, ether-ester-based solvents, and ketone-based solvents. These can be used individually or in combination of two or more.

[0033] Non-aqueous primers should preferably contain a non-aqueous solvent with an aniline point of 12 to 70°C. Such non-aqueous solvents are thought to contribute to improved adhesion by slightly swelling or dissolving the existing coating. Suitable non-aqueous solvents with an aniline point of 12 to 70°C include, for example, one or more selected from aliphatic hydrocarbon-containing mixed solvents such as mineral spirits, petroleum ethers, petroleum naphtha, solvent naphtha, kerosene, and other petroleum-based solvents. The aniline point is measured according to the method specified in JIS K2256.

[0034] The resin component in the primer consists of one or more compounds, and it is desirable that at least one of these compounds has a reactive silyl group. Such compounds having a reactive silyl group are thought to contribute to adhesion through their crosslinking reactivity and are therefore suitable for improving the effects of the present invention.

[0035] A reactive silyl group is a group in which one or more functional groups, selected from, for example, an alkoxyl group, a hydroxyl group, a phenoxy group, a mercapto group, an amino group, a halogen, etc., are bonded to a silicon atom. Among these, an alkoxysilyl group, in which an alkoxyl group is bonded to a silicon atom, and / or a silanol group, in which a hydroxyl group is bonded to a silicon atom, are preferred.

[0036] Examples of compounds having a reactive silyl group include tetraalkoxysilane compounds, alkylalkoxysilane compounds, silane coupling agents, reactive silyl group-containing vinyl compounds, or compounds derived from these (e.g., condensates, modified products, polymers, copolymers, etc.). These can be used individually or in combination of two or more.

[0037] Examples of tetraalkoxysilane compounds include tetramethoxysilane, tetraethoxysilane, and tetrabutoxysilane.

[0038] Examples of alkylalkoxysilane compounds include methyltrimethoxysilane, methyltriethoxysilane, methyltributoxysilane, ethyltrimethoxysilane, ethyltriethoxysilane, ethyltributoxysilane, propyltrimethoxysilane, propyltriethoxysilane, butyltrimethoxysilane, butyltriethoxysilane, phenyltrimethoxysilane, phenyltriethoxysilane, phenyltributoxysilane, dimethyldimethoxysilane, dimethyldiethoxysilane, dimethyldibutoxysilane, diethyldimethoxysilane, diethyldiethoxysilane, dipropyldimethoxysilane, dipropyldiethoxysilane, dibutyldimethoxysilane, dibutyldiethoxysilane, diphenyldimethoxysilane, diphenyldiethoxysilane, diphenyldibutoxysilane, methylphenyldimethoxysilane, and methylphenyldiethoxysilane.

[0039] Examples of silane coupling agents include epoxy group-containing silane coupling agents such as γ-glycidoxypropylmethyldiethoxysilane, γ-glycidoxypropylmethyltriethoxysilane, and β-(3,4-epoxycyclohexyl)ethyltrimethoxysilane; amino group-containing silane coupling agents such as N-β(aminoethyl)γ-aminopropylmethyltriethoxysilane, γ-aminopropyltrimethoxysilane, and γ-aminopropyltriethoxysilane; as well as isocyanate group-containing silane coupling agents, isocyanurate group-containing silane coupling agents, and acid anhydride group (carboxyl group)-containing silane coupling agents.

[0040] Examples of reactive silyl group-containing vinyl compounds include γ-(meth)acryloxypropyltrimethoxysilane, γ-(meth)acryloxypropyltriethoxysilane, γ-(meth)acryloxypropylmethyldimethoxysilane, and γ-(meth)acryloxypropylmethyldiethoxysilane. Such reactive silyl group-containing vinyl compounds can be used in the form of resins obtained by copolymerization with other monomers (e.g., acrylic silicone resins). Examples of such monomers include (meth)alkyl acrylates, hydroxyl group-containing monomers, carboxyl group-containing monomers, amino group-containing monomers, pyridine monomers, nitrile group-containing monomers, amide group-containing monomers, epoxy group-containing monomers, carbonyl group-containing monomers, fluorine-containing monomers, aromatic monomers, UV-absorbing group-containing monomers, and photostable group-containing monomers. These can be used individually or in combination of two or more. In this invention, alkyl acrylates and alkyl methacrylates are collectively referred to as (meth)alkyl acrylates. A monomer is a general term for a compound that has a polymerizable unsaturated double bond.

[0041] The resin component in the primer may include compounds other than those having a reactive silyl group. Examples of such compounds include various resins such as acrylic resins, polyester resins, polyether resins, polyurethane resins, fluororesins, vinyl acetate resins, epoxy resins, and vinyl chloride resins, or various compounds capable of producing these resins.

[0042] Examples of the resin components of the primer are shown below, in forms (1) to (4).

[0043] (1) When using a resin that contains a reactive silyl group-containing vinyl compound as a resin component, for example, a resin obtained by copolymerizing at least a reactive silyl group-containing vinyl compound and a hydroxyl group-containing monomer, such a resin can be used in combination with, for example, a polyisocyanate compound (described later).

[0044] (2) When using a resin that contains a reactive silyl group-containing vinyl compound as a resin component, for example, a resin obtained by copolymerizing at least a reactive silyl group-containing vinyl compound and an epoxy group-containing monomer, such a resin can be used in combination with, for example, a polyamine compound (described later).

[0045] (3) An embodiment (3) in which the resin component of the undercoat material includes a polyol compound, a polyisocyanate compound, and a compound having a reactive silyl group.

[0046] Examples of polyol compounds in this embodiment (3) include polyether polyols, polyester polyols, acrylic polyols, polyisoprene polyols, carbonate polyols, and the like, and one or more of these can be used. The hydroxyl value of the polyol compound is preferably 10 to 200 KOH mg / g, more preferably 20 to 100 KOH mg / g. The hydroxyl value is expressed as the number of mg of potassium hydroxide equivalent to the hydroxyl groups contained in 1 g of resin solids.

[0047] In embodiment (3), it is desirable to include an acrylic polyol (hydroxyl group-containing acrylic resin) as the polyol compound. As the acrylic polyol, a polymer of a resin containing an alkyl (meth)acrylate, a hydroxyl group-containing monomer, and other monomers as necessary can be used. The alkyl (meth)acrylate and hydroxyl group-containing monomer can be the same as those described above. Examples of the other monomers include carboxyl group-containing monomers, amino group-containing monomers, pyridine monomers, nitrile group-containing monomers, amide group-containing monomers, epoxy group-containing monomers, carbonyl group-containing monomers, alkoxysilyl group-containing monomers, aromatic monomers, ultraviolet-absorbing group-containing monomers, and photostable group-containing monomers. These can be used individually or in combination of two or more.

[0048] Polyisocyanate compounds have two or more isocyanate groups in one molecule and crosslink with the polyol compounds to form a polyurethane resin coating. Examples of polyisocyanate compounds include toluene diisocyanate (TDI), 4,4-diphenylmethane diisocyanate (pure-MDI), polymeric MDI, xylylene diisocyanate (XDI), hexamethylene diisocyanate (HMDI), isophorone diisocyanate (IPDI), hydrogenated XDI, hydrogenated MDI, etc., or derivatives thereof (for example, compounds obtained by urethaneization reactions, allophanate reactions, isocyanurate reactions, etc.). Compounds having an allophanate group, or having both an allophanate group and an isocyanurate group can also be used. These can be used individually or in combination of two or more.

[0049] The mixing ratio of the polyisocyanate compound should be set considering the equivalent ratio of the isocyanate groups of the polyisocyanate compound to the hydroxyl groups of the hydroxyl group-containing resin, i.e., the NCO / OH ratio. The NCO / OH ratio is preferably 0.6 to 1.4, more preferably 0.8 to 1.2. With such a ratio, the effects of the present invention can be fully obtained.

[0050] The same compounds having a reactive silyl group in embodiment (3) can be those described above.

[0051] (4) An embodiment (4) in which the resin component of the undercoat material includes an epoxy resin, a polyamine compound, and a compound having a reactive silyl group.

[0052] In this embodiment (4), epoxy resin can be used. Examples of such epoxy resins include flexible epoxy resins and rigid epoxy resins. If the epoxy resin includes at least a flexible epoxy resin, it is preferable in terms of improving the effects of the present invention, and advantageous effects can be obtained even when the existing wall surface has a sealant filling the joint between plate-shaped wall materials.

[0053] Examples of flexible epoxy resins include aliphatic-modified epoxy resins, butadiene-based epoxy resins, ε-caprolactone-modified epoxy resins, thiol-based epoxy resins, amine-modified epoxy resins, rubber-modified epoxy resins, urethane-modified epoxy resins, polyol-modified epoxy resins, and fatty acid-modified epoxy resins. These can be used individually or in combination of two or more. Among these, fatty acid-modified epoxy resins are preferred.

[0054] The ratio of flexible epoxy resin to the epoxy resin in embodiment (4) (in terms of solid content) is preferably 50% by weight or more, more preferably 70-100% by weight, from the viewpoint of adhesion to the substrate, conformability, etc.

[0055] Fatty acid-modified epoxy resins are obtained by adding an aliphatic polybasic acid compound to an epoxy resin. For example, esterification reactions can be used as the addition reaction. Examples of epoxy resins that can be used include bisphenol A type epoxy resin, bisphenol F type epoxy resin, and various other epoxy resins, such as the rigid epoxy resins described later. Examples of aliphatic polybasic acid compounds include maleic acid, maleic anhydride, fumaric acid, itaconic acid, itaconic anhydride, citraconic acid, tetrahydrophthalic acid, tetrahydrophthalic anhydride, hexahydrophthalic acid, hexahydrophthalic anhydride, cyclohexanedicarboxylic acid, succinic acid, malonic acid, glutaric acid, adipic acid, azelaic acid, sebacic acid, 1,12-dokan2 acid, and dimer acid. Among these, dimer acid is preferred.

[0056] Dimer acids are dimers of unsaturated fatty acids. Examples of unsaturated fatty acids that make up dimer acids include oleic acid, elaidic acid, cetoleic acid, sorbic acid, linoleic acid, linolenic acid, arachidonic acid, soybean oil fatty acids, tall oil fatty acids, and flaxseed oil fatty acids.

[0057] Dimer acid-modified epoxy resins obtained by the addition reaction of dimer acid to epoxy resin are suitable as epoxy resins for primers. The ratio of dimer acid-modified epoxy resin to the epoxy resin in the primer (in terms of solid content) is preferably 50% by weight or more, and more preferably 70-100% by weight, from the viewpoint of adhesion to the substrate and conformability.

[0058] Examples of rigid epoxy resins include bisphenol type epoxy resins such as bisphenol A type epoxy resin and bisphenol F type epoxy resin, phenol novolac type epoxy resins such as phenol novolac type bisphenol A epoxy resin and phenol novolac type bisphenol F epoxy resin, novolac type epoxy resins such as cresol novolac type epoxy resin and bisphenol A novolac type epoxy resin, alicyclic epoxy resins, hydrogenated bisphenol A type epoxy resin, guccidyl ether type epoxy resin, bisphenol S type epoxy resin, biphenyl type epoxy resin, dicyclo type epoxy resin, and naphthalene type epoxy resin. These can be used individually or in combination of two or more types.

[0059] The epoxy resin of embodiment (4) preferably has an epoxy equivalent (per solid content) of 300 to 3000 g / eq, more preferably 400 to 2000 g / eq, even more preferably 450 to 1500 g / eq, and particularly preferably 500 to 1100 g / eq. When the epoxy equivalent is above the lower limit, it is suitable in terms of conformability to the substrate and adhesion. When the epoxy equivalent is below the upper limit, it is suitable in terms of blister resistance, adhesion, and suitability as a topcoat material. Note that epoxy equivalent is the value obtained by dividing the molecular weight of the epoxy resin by the number of epoxy groups.

[0060] The polyamine compound in embodiment (4) has two or more amino groups in one molecule and crosslinks with the epoxy resin to form an epoxy resin coating. Examples of polyamine compounds include aliphatic polyamines, alicyclic polyamines, aromatic polyamines, heterocyclic polyamines, aliphatic polyamides, alicyclic polyamides, aromatic polyamides, aliphatic polyamidoamines, alicyclic polyamidoamines, aromatic polyamidoamines, and other polyamine compounds. These can be used individually or in combination of two or more. Among these, one or more polyamine compounds selected from aliphatic polyamines, aliphatic polyamides, and aliphatic polyamidoamines can be suitably used.

[0061] Such polyamine compounds preferably have an active hydrogen equivalent (per solid content) of 40 to 200 g / eq, more preferably 50 to 150 g / eq, and even more preferably 60 to 95 g / eq. Having the active hydrogen equivalent within this range allows for sufficient effects in terms of adhesion and other properties. The active hydrogen equivalent is the value obtained by dividing the molecular weight of the polyamine compound by the number of hydrogen atoms in the amino group.

[0062] In embodiment (4), the epoxy resin and polyamine compound can be used by setting each material such that the ratio of the active hydrogen equivalent of the polyamine compound to the epoxy equivalent of the epoxy resin is [active hydrogen equivalent of the polyamine compound / epoxy equivalent of the epoxy resin] is preferably less than 0.4, more preferably 0.01 to 0.3, even more preferably 0.03 to 0.25, and particularly preferably 0.05 to 0.2. By using a combination of epoxy resin and polyamine compound materials that satisfy these conditions, more favorable effects in terms of adhesion and other aspects can be obtained.

[0063] The mixing ratio of epoxy resin to polyamine compound is preferably set to 1.0 or less, more preferably 0.2 to 1.0, even more preferably 0.4 to 0.98, particularly preferably 0.6 to 0.95, and most preferably 0.7 to 0.9. The mixing ratio of amine curing agent and active hydrogen equivalent, as well as the mixing ratio of epoxy resin and epoxy equivalent, are all based on solid content. When the mixing ratio of epoxy resin to polyamine compound is below the above upper limit, it is favorable in terms of adhesion, substrate conformability, and suitability as a topcoat material, and when it is above the above lower limit, it is favorable in terms of curability and adhesion.

[0064] The same compounds as those described above can be used as the reactive silyl group compound in embodiment (4). In embodiment (4), a silane coupling agent is preferred, and in particular, one or more selected from epoxy group-containing silane coupling agents and amino group-containing silane coupling agents can be preferably used.

[0065] In embodiment (4), the solid content weight ratio of the polyamine compound to the silane coupling agent (polyamine compound:silane coupling agent) is preferably 10:90 to 90:10, more preferably 12:88 to 80:20, even more preferably 14:86 to 65:35, and particularly preferably 15:85 to 50:50. By using both components in such ratios, adhesion can be further enhanced. This is especially suitable for water-based primers.

[0066] The primer in the present invention may contain a compound having a reactive silyl group in the solid content of the resin component, preferably in the range of 0.1 to 30% by weight, more preferably 0.2 to 25% by weight, and even more preferably 0.3 to 20% by weight, in terms of SiO2. By having the mixing ratio of the compound having a reactive silyl group within this range, the adhesion between the existing film and the primer film, and the adhesion between the primer film and the topcoat film can be further improved, and it is also suitable in terms of preventing cracking of the primer film and the topcoat film.

[0067] Note that "SiO2 equivalent" refers to the weight of silica (SiO2) remaining after the compound containing the Si-O bond is completely hydrolyzed and then calcined at 900°C. Generally, tetraalkoxysilanes, alkylalkoxysilanes, etc., react with water to undergo hydrolysis, becoming silanols. Further condensation reactions occur with other silanols or with alkoxy compounds. This reaction, when carried to its ultimate conclusion, results in silica (SiO2). These reactions are... RO(Si(OR)2O) n R + (n+1)H2O → nSiO2 + (2n+2)ROH (R represents an alkyl group. n is an integer.) This is represented by the following reaction equation. In this invention, the SiO2 equivalent is calculated based on this reaction equation, determining the amount of remaining silica component.

[0068] The primer may contain a thickening agent. Examples of thickening agents include organic bentonite, fine silica powder, surface-treated calcium carbonate, amide wax, hydrogenated castor oil wax, benzylidene sorbitol, metal soap, polyethylene oxide, polymerized vegetable oil, polycarboxylate amine salt, xanthan gum, guar gum, polyacrylic acid compounds, polyvinyl alcohol, polyethylene oxide, and urethane-modified polyether compounds. These can be used individually or in combination of two or more.

[0069] The amount of thickener mixed (solid content) is preferably 0.1 to 10 parts by weight, more preferably 0.2 to 5 parts by weight, per 100 parts by weight of the solid content of the resin component. When the amount of thickener mixed is within this range, the primer can be easily applied evenly along the irregularities of the existing wall surface, ensuring sufficient adhesion and allowing the effects of the present invention to be obtained stably.

[0070] The non-volatile content of the primer (at the time of application) is preferably 30-90% by weight, preferably 40-80% by weight, and more preferably 45-75% by weight. Having a non-volatile content of the primer in this ratio enhances the effect of evenly applying the primer along the irregularities of the existing wall surface. The non-volatile content is measured according to the method of JIS K5601-1-2, with a heating temperature of 105°C and a heating time of 60 minutes.

[0071] The primer may contain various components other than those listed above, as long as the effects of the present invention are not significantly impaired. Examples of such components include aggregates, dyes, dehydrating agents, leveling agents, wetting agents, plasticizers, film-forming aids, antifreeze agents, preservatives, fungicides, algaecides, antibacterial agents, dispersants, defoaming agents, adsorbents, fibers, crosslinking agents, ultraviolet absorbers, light stabilizers, antioxidants, and curing catalysts. Examples of curing catalysts include organotin compounds, organoaluminum compounds, organotitanate compounds, acidic compounds, amine compounds, and alkaline compounds. The primer of the present invention can be manufactured by uniformly mixing the above-mentioned components by conventional methods. The primer can take the form of, for example, a one-component type, a two-component type, or a multi-component type with more than one component.

[0072] The primer can be applied directly to the existing wall surface, but various pretreatments can be carried out as needed. Pretreatments include, for example, removal of severely deteriorated existing coatings, removal of contaminants by high-pressure water washing, repair with putty or filler, and restoration of the surface shape. If a new sealant has been applied to the existing wall surface, it is desirable to apply the primer approximately 2 to 10 days after the sealant has been applied.

[0073] For applying the primer, known painting tools can be used. Examples of painting tools include sprayers, rollers, brushes, trowels, etc. The amount of primer to be applied should be set appropriately according to the surface shape of the existing wall, the painting equipment used, etc., but preferably 0.03 to 0.5 kg / m 2 , more preferably 0.05~0.3 kg / m 2The primer can also be diluted as needed during painting.

[0074] The viscosity of the primer during painting is preferably 0.1 to 10 Pa·s, more preferably 0.2 to 5 Pa·s. By keeping the viscosity of the primer within this range, the effects of the present invention can be stably obtained. The viscosity referred to herein is the value obtained by measuring the viscosity at 20 rpm (the indicator value at the 4th rotation) using a BH-type viscometer, and the measurement temperature is 23°C.

[0075] The drying time for the primer is preferably 1 hour or more, and more preferably 2 to 200 hours, at room temperature (0 to 40°C).

[0076] In this invention, a topcoat is applied after the above-mentioned undercoat has been applied and dried. The topcoat in this invention is preferably a material that can take advantage of the existing uneven pattern of the wall surface. Specifically, usable topcoats include, for example, transparent topcoats and colored topcoats. A transparent topcoat contains a resin component, and its film exhibits transparency. A transparent topcoat may also form a colored transparent film; such a transparent topcoat should contain a resin component and, in addition, a coloring pigment to the extent that it does not impair transparency. Examples of colored topcoats include those containing a resin component and a coloring pigment.

[0077] Various resins can be used as the resin component in the topcoat material. Examples of resin types include vinyl acetate resin, polyester resin, alkyd resin, vinyl chloride resin, epoxy resin, acrylic resin, urethane resin, acrylic silicone resin, fluororesin, etc., or composite resins thereof. Among these, one or more types selected from acrylic resin, urethane resin, acrylic silicone resin, fluororesin, etc. are preferred. Furthermore, examples of such resin components include water-soluble resins, water-dispersible resins (resin emulsions), solvent-soluble resins, solvent-free resins, non-aqueous-dispersible resins, powder resins, etc. Among these, one or more types selected from water-soluble resins, water-dispersible resins, solvent-soluble resins, and non-aqueous-dispersible resins are preferred. In addition, these resin components may have crosslinking reactivity. When a resin component with crosslinking reactivity is used, the durability, water resistance, weather resistance, chemical resistance, adhesion, etc. of the coating can be improved.

[0078] As coloring pigments, for example, known inorganic coloring pigments, organic coloring pigments, etc., can be used. By using one or more of these coloring pigments as appropriate, the topcoat material can be set to a desired color tone. The mixing ratio of coloring pigments in the colored topcoat material is preferably 1 to 500 parts by weight, more preferably 5 to 200 parts by weight, and even more preferably 10 to 150 parts by weight, per 100 parts by weight of the solid content of the resin component.

[0079] Such topcoat materials may contain various components other than those listed above, as long as the effects of the present invention are not significantly impaired. Examples of such components include thickeners, film-forming aids, leveling agents, wetting agents, plasticizers, antifreeze agents, pH adjusters, extender pigments, preservatives, antifungal agents, antialgal agents, antibacterial agents, dispersants, defoaming agents, adsorbents, fibers, crosslinking agents, ultraviolet absorbers, light stabilizers, antioxidants, destaining agents, hydrophilic agents, water repellents, catalysts, solvents, and water. The topcoat material of the present invention can be manufactured by uniformly mixing the above resin components, coloring pigments, and the various components listed above as needed, using conventional methods. The form of the topcoat material can be, for example, a one-component type, a two-component type, or a multi-component type with more than one component. Examples of gloss levels for the topcoat material include high gloss, 70% gloss, 50% gloss, 30% gloss, and matte.

[0080] For applying the topcoat, known painting tools can be used. Examples of painting tools include sprayers, rollers, brushes, etc. The amount of topcoat applied should be set appropriately according to the surface shape of the existing wall, the type of topcoat, the type of painting equipment, etc., but preferably 0.05 to 0.5 kg / m 2 More preferably 0.1 to 0.4 kg / m 2 During painting, the topcoat material can be diluted as needed.

[0081] In this invention, one or more types of topcoat materials can be used. When using two or more types of topcoat materials, it is possible to achieve a multi-colored appearance with two or more colors by using topcoat materials with different color tones and applying them in a divided manner. [Examples]

[0082] The following examples illustrate the features of the present invention.

[0083] [Test Example 1] In Test Example 1, the following primers 1-1 to 1-4 were prepared as undercoats, and tests were conducted using these primers.

[0084] (Undercoating material 1-1) The main component comprises a non-aqueous dispersion acrylic polyol {hydroxyl value: 50 KOH mg / g, weight-average molecular weight: 70000, glass transition temperature: 38°C, solids content: 50 wt%, medium: mineral spirits (aniline point 42°C)}, a coloring agent (titanium dioxide, specific gravity: 4.2), amide wax, solvent naphtha (aniline point: 13°C), and a silicone-based defoaming agent. A mixture of a polyisocyanate compound (1,6-diisocyanatohexane derivative, solids content: 100% by weight), a tetraalkoxysilane compound (isobutyl alcohol modified product of tetramethoxysilane condensate), and a curing agent containing mineral spirits (same as above) (NCO / OH ratio 1.0). Pigment volume concentration: 13%, non-volatile content of primer: 58% by weight, ratio of compounds containing reactive silyl groups in resin solids (in SiO2 equivalent): 3% by weight, amount of colorant: 60 parts by weight per 100 parts by weight of resin solids, amount of thickener: 1 part by weight per 100 parts by weight of resin solids.

[0085] (Undercoating material 1-2) The main component includes a non-aqueous dispersion acrylic polyol (same as above), a matting agent (white carbon, specific gravity: 2.0), amide wax, solvent naphtha (same as above), and a silicone-based defoaming agent. A mixture of a curing agent containing a polyisocyanate compound (same as above), a tetraalkoxysilane compound (same as above), and mineral spirits (same as above) (NCO / OH ratio: 1.0). Pigment volume concentration: 16%, non-volatile content of primer: 53% by weight, ratio of compounds containing reactive silyl groups in resin solids (in SiO2 equivalent): 3% by weight, amount of matting agent: 38 parts by weight per 100 parts by weight of resin solids, amount of thickener: 1 part by weight per 100 parts by weight of resin solids.

[0086] (Undercoating material 1-3) A main component comprising a non-aqueous dispersion acrylic polyol (same as above), a colorant (same as above), amide wax, solvent naphtha (same as above), and a silicone-based defoamer, A mixture of a curing agent containing a polyisocyanate compound (same as above), a tetraalkoxysilane compound (same as above), and mineral spirits (same as above) (NCO / OH ratio: 1.0). Pigment volume concentration: 13%, non-volatile content of primer: 58% by weight, ratio of compounds containing reactive silyl groups in resin solids (in SiO2 equivalent): 0.2% by weight, amount of colorant: 60 parts by weight per 100 parts by weight of resin solids, amount of thickener: 1 part by weight per 100 parts by weight of resin solids.

[0087] (Undercoating material 1-4) A main component comprising a non-aqueous dispersion acrylic polyol (same as above), amide wax, solvent naphtha, and a silicone-based defoaming agent, A mixture of a polyisocyanate compound (same as above), a tetraalkoxysilane compound (same as above), and a curing agent containing mineral spirits (NCO / OH ratio: 1.0). Pigment volume concentration: 0%, non-volatile content of primer: 58% by weight, ratio of compounds containing reactive silyl groups in resin solids (in SiO2 equivalent): 0.2% by weight, amount of thickener: 1 part by weight per 100 parts by weight of solids of resin component.

[0088] (Test Example 1-1) ○ Exam i As the existing wall surface, we prepared a brown ceramic siding board that had deteriorated due to outdoor exposure (the surface had tile-like raised and recessed areas (joints), and the raised areas had further irregular uneven patterns, with an inorganic clear coating as the outermost layer). Primer 1-1 was applied to the entire surface of this existing wall at a rate of 0.1 kg / m². 2 The surface was spray-painted and allowed to dry. Here, the film of primer 1-1 had a different color tone from the existing wall surface (color difference 38), and it was easy to confirm that the primer film had been evenly formed over the entire uneven pattern of the existing wall surface. Next, the topcoat (brown acrylic silicone resin paint) was applied at a rate of 0.2 kg / m². 2 Test specimens were prepared by spray painting and allowing them to dry and cure for 7 days. All painting and curing processes were carried out under standard conditions (temperature 23°C, relative humidity 50%).

[0089] The test specimens prepared using the above method were subjected to 500 hours of exposure using an accelerated weathering tester (Metal Weather; manufactured by Daipla Wintes Co., Ltd.), and changes in the appearance of the test specimen surface (lifting, peeling) were observed. Next, cross-cuts were made in the coating of each part of the uneven pattern using a utility knife, and the adhesion was confirmed by applying and peeling tape over these cross-cut areas. As a result, in Test Example 1-1, there was no change in appearance due to the accelerated weathering test, and no peeling was observed in any part.

[0090] ○ Exam II As the existing wall surface, a brown ceramic siding board that had deteriorated due to outdoor exposure was prepared (with tile-like raised and recessed areas (joints) on the surface, and the raised areas further having an irregular uneven pattern, and a fluororesin clear coating as the outermost layer). Using this existing wall surface, a test specimen was prepared and tested in the same manner as in test i.

[0091] ○ Exam III As an existing wall surface, a brown ceramic siding board that had deteriorated due to outdoor exposure was prepared (with tile-like raised and recessed areas (grout) on the surface, and the raised areas further having an irregular uneven pattern, and an acrylic silicone resin colored coating as the outermost layer). Using this existing wall surface, a test specimen was prepared and tested in the same manner as in test i.

[0092] The test results are shown in Table 1. In Table 1, the condition after applying the primer was graded on a four-point scale (Excellent: A>B>C>D: Poor) with the following criteria: "A" for a color difference of 10 or more or a gloss difference of 15 or more between the existing wall surface and the primer film; "B" for a color difference of 5 or more but less than 10 or a gloss difference of 10 or more but less than 15; "C" for a color difference of 3 or more but less than 5 or a gloss difference of 5 or more but less than 10; and "D" for a color difference of less than 3 or a gloss difference of less than 5. In the accelerated weathering test, the evaluation was also graded on a four-point scale (Excellent: A>B>C>D: Poor) with the following criteria: "A" for no change in appearance and no peeling observed in any part; and "D" for a clear change in appearance or significant peeling.

[0093] (Test Example 1-2) The test specimens were prepared in the same manner as in Test Example 1-1, except that primer 1-2 was used instead of primer 1-1. After applying primer 1-2, the primer 1-2 film had a different gloss level from the existing wall surface (gloss difference of 42), and it was easy to confirm that the primer film had been evenly formed over the entire uneven pattern of the existing wall surface. Furthermore, in Test Example 1-2, there was no change in appearance due to the accelerated weathering test, and no peeling was observed in any part.

[0094] (Test Examples 1-3) The test specimens were prepared in the same manner as in Test Example 1-1, except that primer 1-3 was used instead of primer 1-1. After applying primer 1-3, the film of primer 1-3 had a different color tone from the existing wall surface (color difference 38), and it was easy to confirm that the primer film had been evenly formed over the entire uneven pattern of the existing wall surface. In addition, in Test Example 1-3, there was no change in appearance in the accelerated weathering test, and it was generally good, although some peeling was observed.

[0095] (Test Examples 1-4) In an attempt to prepare test specimens using the same method as in Test Example 1-1, except that primer 1-4 was used instead of primer 1-1, no difference in color tone or gloss was observed between the existing coating and the coating formed after applying primer 1-4. It was not easy to confirm that the primer coating had been evenly formed over the entire uneven pattern of the existing wall surface. Furthermore, peeling was observed in the accelerated weathering test in Test Example 1-4.

[0096] Test Examples 1-1 to 1-3 correspond to the examples, and generally showed better results compared to Test Example 1-4 (corresponding to the comparative example).

[0097] [Table 1]

[0098] [Test Example 2] In Test Example 2, primers 2-1 to 2-12 were prepared by combining the following main components Q1 to Q7 and hardeners R1 to R5, and tests were conducted using these primers.

[0099] (Main ingredient Q1) Main component Q1 was prepared by uniformly mixing 75 parts by weight of epoxy resin a {dimer acid modified epoxy resin solution, solids content: 60% by weight, epoxy equivalent (per solids): 780 g / eq, medium: mineral spirits (aniline point 42°C) and solvent naphtha (aniline point 13°C)}, 18 parts by weight of coloring agent (titanium dioxide, specific gravity: 4.2), 4 parts by weight of solvent naphtha (same as above), and 4 parts by weight of additives (dispersant, thickener, and defoamer) by conventional methods.

[0100] (Main ingredient Q2) Main component Q2 was prepared by uniformly mixing 62 parts by weight of epoxy resin a (same as above), 30 parts by weight of coloring agent (same as above), 4 parts by weight of solvent naphtha (same as above), and 4 parts by weight of additives (dispersant, thickener, and defoamer) using a conventional method.

[0101] (Main ingredient Q3) Main component Q3 was prepared by uniformly mixing 55 parts by weight of epoxy resin a (same as above), 35 parts by weight of coloring agent (same as above), 6 parts by weight of solvent naphtha (same as above), and 4 parts by weight of additives (dispersant, thickener, and defoamer) using a conventional method.

[0102] (Main ingredient Q4) Main component Q4 was prepared by uniformly mixing 38 parts by weight of epoxy resin a (same as above), 15 parts by weight of coloring agent (same as above), 30 parts by weight of heavy calcium carbonate (specific gravity 2.7), 12 parts by weight of solvent naphtha (same as above), and 5 parts by weight of additives (dispersant, thickener, and defoamer) using a conventional method.

[0103] (Main ingredient Q5) Main component Q5 was prepared by uniformly mixing 65 parts by weight of epoxy resin a (same as above), 29 parts by weight of solvent naphtha (same as above), and 6 parts by weight of additives (thickener and defoamer) using a conventional method.

[0104] (Main ingredient Q6) Main component Q6 was prepared by uniformly mixing 40 parts by weight of epoxy resin a (same as above), 50 parts by weight of solvent naphtha (same as above), and 10 parts by weight of additives (thickener and defoamer) using a conventional method.

[0105] (Main ingredient Q7) Main component Q7 was prepared by uniformly mixing 60 parts by weight of epoxy resin b {water-based epoxy resin (aqueous dispersion of bisphenol A type epoxy resin), solids content: 45% by weight, epoxy equivalent (per solids) 510 g / eq, medium: water}, 25 parts by weight of coloring agent (same as above), 3 parts by weight of ether-based solvent, and 2 parts by weight of additives (dispersant, thickener, and defoamer) by a conventional method.

[0106] (Hardening agent R1) Polyamine compound a {aliphatic polyamidoamine, solids content: 100% by weight, active hydrogen equivalent (per solids): 80 g / eq} 15 parts by weight, silane compound {N-(2-aminoethyl)-3-aminopropylmethyldimethoxysilane} 4 parts by weight, alcohol-based solvent 16 parts by weight, and solvent naphtha (same as above) 65 parts by weight were uniformly mixed by conventional methods to produce curing agent R1.

[0107] (Hardening agent R2) Polyamine compound a (same as above) 15 parts by weight, alcohol-based solvent 16 parts by weight, and solvent naphtha (same as above) 69 parts by weight were uniformly mixed by a conventional method to produce curing agent R2.

[0108] (Hardening agent R3) Polyamine compound b {aliphatic polyamidoamine, solids content: 100% by weight, active hydrogen equivalent (per solids): 180 g / eq} 25 parts by weight, silane compound (same as above) 4 parts by weight, alcohol-based solvent 11 parts by weight, and solvent naphtha (same as above) 60 parts by weight were uniformly mixed by conventional methods to produce curing agent R3.

[0109] (Hardening agent R4) Polyamine compound c {water-soluble modified aliphatic polyamine resin, solids content: 80% by weight, active hydrogen equivalent (per solids): 140 g / eq, medium: water} 35 parts by weight and silane compound (same as above) 65 parts by weight were uniformly mixed by a conventional method to produce curing agent R4.

[0110] (Hardening agent R5) Polyamine compound c (same as above) and silane compound (same as above) were uniformly mixed by conventional methods to produce curing agent R5.

[0111] (Undercoat material 2-1) Primer 2-1 was prepared by uniformly mixing the above main component Q1 (100 parts by weight) and the above hardener R1 (25 parts by weight). The characteristic values ​​of this primer are shown in Table 1. The mixing ratio of epoxy resin to amine curing agent [(amount of polyamine compound / equivalent amount of active hydrogen of polyamine compound) / (amount of epoxy resin / epoxy equivalent of epoxy resin)] (indicated as "mixing ratio" in Table 1) is 0.81. Pigment volume concentration is 8%, The non-volatile content of the primer (indicated as "non-volatile content" in Table 2) is 54% by weight. The proportion of compounds containing reactive silyl groups in the resin solids (in SiO2 terms, indicated as "SiO2 equivalent amount" in Table 2) is 0.5% by weight. The amount of coloring agent is 36 parts by weight per 100 parts by weight of solid content of the resin component. The amount of thickener (solids) is 1.6 parts by weight per 100 parts by weight of the solids of the resin component.

[0112] (Undercoat material 2-2) Primer material 2-2 was prepared by uniformly mixing the above main component Q2 (100 parts by weight) and the above hardener R1 (20 parts by weight). The characteristic values ​​of this primer material 2-2 are shown in Table 2.

[0113] (Undercoat material 2-3) Primer material 2-3 was prepared by uniformly mixing the above main component Q3 (100 parts by weight) and the above hardener R1 (18 parts by weight). The characteristic values ​​of this primer material 2-3 are shown in Table 2.

[0114] (Undercoating material 2-4) Primer material 2-4 was prepared by uniformly mixing the above main component Q2 (100 parts by weight) and the above hardener R1 (22 parts by weight). The characteristic values ​​of this primer material 2-4 are shown in Table 2.

[0115] (Undercoat material 2-5) Primer material 2-5 was prepared by uniformly mixing the above main component Q2 (100 parts by weight) and the above hardener R1 (30 parts by weight). The characteristic values ​​of this primer material 2-5 are shown in Table 2.

[0116] (Undercoat material 2-6) Primer material 2-6 was prepared by uniformly mixing the above main component Q2 (100 parts by weight) and the above hardener R2 (20 parts by weight). The characteristic values ​​of this primer material 2-6 are shown in Table 2.

[0117] (Undercoat material 2-7) Primer material 2-7 was prepared by uniformly mixing the above main component Q2 (100 parts by weight) and the above hardener R3 (28 parts by weight). The characteristic values ​​of this primer material 2-7 are shown in Table 2.

[0118] (Undercoat material 2-8) Primer material 2-8 was prepared by uniformly mixing the above main component Q4 (100 parts by weight) and the above hardener R3 (16 parts by weight). The characteristic values ​​of this primer material 2-8 are shown in Table 2.

[0119] (Undercoat material 2-9) Primer material 2-9 was prepared by uniformly mixing the above main component Q5 (100 parts by weight) and the above hardener R3 (28 parts by weight). The characteristic values ​​of this primer material 2-9 are shown in Table 2.

[0120] (Undercoat material 2-10) Primer material 2-10 was prepared by uniformly mixing the above main component Q6 (100 parts by weight) and the above hardener R3 (17 parts by weight). The characteristic values ​​of this primer material 2-10 are shown in Table 2.

[0121] (Undercoating material 2-11) Primer material 2-11 was prepared by uniformly mixing the above main component Q7 (100 parts by weight) and the above hardener R4 (20 parts by weight). The characteristic values ​​of this primer material 2-11 are shown in Table 2.

[0122] (Undercoat material 2-12) Primer material 2-12 was prepared by uniformly mixing the above main component Q7 (100 parts by weight) and the above hardener R5 (10 parts by weight). The characteristic values ​​of this primer material 2-12 are shown in Table 2.

[0123] (Examples 2-1 to 2-12) Except for using primers 2-1 to 2-12 instead of primer 1-1, test specimens were prepared and tested in the same manner as in Test Example 1-1. The test results are shown in Table 3. Of these, Test Examples 2-1 to 2-8, 2-11, and 2-12 (corresponding to the examples) showed that the color tone of the primer film differed from the color tone of the existing wall surface, and it was easy to confirm that the primer film was evenly formed over the entire uneven pattern of the existing wall surface. Overall, these results were better than those of Test Examples 2-9 and 2-10 (corresponding to the comparative examples).

[0124] [Table 2]

[0125] [Table 3]

Claims

1. A method for finishing existing wall surfaces that have deteriorated over time, The existing wall surface described above has an uneven pattern on its surface. It has an existing inorganic coating, With respect to the existing wall surface mentioned above, Apply a primer that forms a film with a different color tone and / or gloss level from the existing wall surface. The above primer is, It contains coloring pigments and / or extender pigments, and the pigment volume concentration is 3 to 30%. The non-volatile content is 45-90% by weight. This is a non-aqueous primer containing a non-aqueous solvent with an aniline point of 12 to 70°C. A method of applying a topcoat after the coating has dried.

2. The decorative method according to claim 1, wherein the existing wall surface is composed of a plurality of plate-like wall materials having an uneven surface pattern and an existing coating.

3. The above-mentioned primer further comprises a resin component and a thickener, The cosmetic method according to claim 1, characterized in that the amount of thickener mixed (solid content) is 0.1 to 10 parts by weight per 100 parts by weight of the solid content of the resin component.

4. The cosmetic method according to claim 3, characterized in that the primer contains 10 to 200 parts by weight of the extender pigment per 100 parts by weight of the solid content of the resin component.

5. The cosmetic method according to Claim 1, characterized in that the inorganic coating is a coating containing an inorganic binder selected from a silicone resin, an alkoxysilane, colloidal silica, and a silicate.

6. The cosmetic method according to claim 1, characterized in that the inorganic coating is a clear coating.

7. The cosmetic method according to Claim 1, characterized in that the resin component in the primer material includes an epoxy resin, a polyamine compound, and a compound having a reactive silyl group.

8. The cosmetic method according to Claim 1, characterized in that the resin component in the primer contains a polyol compound, a polyisocyanate compound, and a compound having a reactive silyl group.

9. The cosmetic method according to Claim 1, characterized in that the primer contains a compound having a reactive silyl group as a resin component.

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