JP2020169549A - Decoration method - Google Patents

Abstract

To provide a decoration method capable of forming a beautiful new constructed coat for an existing wall surface having irregular pattern and with a high durability existing coat and maintaining its finished state for long period.SOLUTION: In the decoration method of an existing wall surface deteriorated with age according to the invention, the existing wall surface has irregular pattern on the surface and comprises at least one type of existing coat selected from an inorganic substance coat, an organic inorganic composite coat and a fluorine resin coat, and an undercoat material forming a coat having a color tone and/or a glossiness different from the existing wall surface is sprayed relative to the existing wall surface and after the coat is dried, the coating material is sprayed.SELECTED DRAWING: None

Description

The present invention relates to a makeup method applicable to buildings and the like.

Conventionally, concrete, mortar, various plate-shaped wall materials and the like have been used for the walls of buildings and the like. Of these, for example, as a plate-shaped wall material, a plate-shaped wall material that is provided with an uneven pattern on its surface to give a three-dimensional effect and is coated for protection and beauty is often used. As a material used for such a coating, a material capable of forming a highly durable film such as an inorganic film, an organic-inorganic composite film, and a fluororesin film is preferred from the viewpoint of extending the life and reducing maintenance. ..

Since the wall surface made of such a plate-shaped wall material is exposed to the outdoors for a long period of time, the surface of the plate-shaped wall material deteriorates due to the influence of sunlight, rainfall, dust, etc., and the plate-shaped wall material The initial aesthetics of the material deteriorates over time. Even on a wall surface with a highly durable coating, it is difficult to avoid deterioration and aesthetic deterioration over time.

Japanese Unexamined Patent Publication No. 2016-117795 describes that an undercoat coating material containing an epoxy resin, an amine compound, a silane coupling agent, or the like is applied to a coating film of an acrylic silicone resin or the like. The patent gazette shows that such an undercoat paint exhibits good adhesion to a highly durable coating such as an acrylic silicone resin.

JP-A-2016-117795

However, even if makeup is applied to a deteriorated surface such as a plate-shaped wall material having an uneven pattern by using the method of the above patent document, swelling, peeling, etc. may occur over time, which is a practically satisfactory result. Is hard to obtain.

The present invention has been made in view of the above-mentioned problems, and a beautiful new coating can be formed on an existing wall surface having an uneven pattern and a highly durable existing coating, and the finished state can be maintained for a long period of time. It is an object of the present invention to provide a makeup method that can be retained.

As a result of diligent 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 completes the present invention. It arrived.

That is, the present invention has the following features.
1. 1. It is a method of making up existing walls that have deteriorated over time.
The existing wall surface has an uneven pattern on the surface and has an uneven pattern.
It is provided with at least one existing coating selected from an inorganic coating, an organic-inorganic composite coating, and a fluororesin coating.
For the above existing wall surface
A cosmetic method characterized by applying an undercoat material that forms a film having a color tone and / or glossiness different from that of the existing wall surface, drying the film, and then applying a topcoat material.
2. The existing wall surface has an uneven pattern on the surface and is composed of a plurality of plate-shaped wall materials having an existing coating film. The makeup method described in.

According to the present invention, a beautiful new coating film can be formed on an existing wall surface having an uneven pattern and an existing coating film, and the finished state can be maintained for a long period of time.

Hereinafter, modes for carrying out the present invention will be described.

The present invention can be applied to existing wall surfaces such as buildings and civil engineering structures. Such an existing wall surface is composed of at least a base material and an existing coating film. Examples of the base material include concrete, mortar, metal, wood, glass, etc., and various plate-shaped wall materials. Among these, examples of the plate-shaped wall material include an inorganic hardened body containing any one of cement, calcium silicate, lime, gypsum and the like as a main component. Specific examples of such a plate-shaped wall material include cement board, extruded board, slate board, PC board, ALC board, fiber-reinforced cement board, siding board, ceramic board, calcium silicate board, gypsum board, and hard. Examples include wood piece cement board.

In the present invention, as an existing wall surface, a wall surface having an uneven pattern is targeted. Examples of uneven patterns on the existing wall surface include tile-like patterns, brick-like patterns, geometric patterns, striped patterns, lattice patterns, polka dots patterns, sand wall patterns, yuzu skin patterns, ripple patterns, and the like. , Graphic patterns and the like designed by animals and plants. Specifically, examples of the shape of the convex portion when the uneven pattern is viewed from the front include a square, a rectangle, a circle, an ellipse, a triangle, a rhombus, a polygon, and an indeterminate shape. Examples of the cross-sectional shape of the convex portion in the uneven pattern include a trapezoid, a square, a rectangle, a semicircle, a corrugated shape, a step shape, a triangle shape, and a chevron shape. Examples of the concave portion in the uneven pattern include those that are flat and form joints. The height difference between the concave portion and the convex portion may be constant or different in each portion, but is preferably 20 mm or less, more preferably about 1 to 15 mm. Such an uneven pattern may be applied to either one or both of the base material and the existing coating film.

In the existing wall surface of the present invention, at least one existing coating selected from an inorganic coating, an organic-inorganic composite coating, and a fluororesin coating (hereinafter, also referred to as “high durability existing coating”) is provided on the surface of the base material. This existing coating is various highly durable coatings that have already been coated on the base material by on-site coating, factory coating (line coating), or the like. Examples of such existing coatings include colored coatings (enamel-based coatings, printing coatings, etc.), clear coatings, laminated coatings of these, and the like, which are formed by applying and curing various coating materials on a base material. is there. Such a coating material may be, for example, any of a room temperature drying type, a room temperature curing type, a baking curing type, an ultraviolet (UV) curing type, an electron beam curing type and the like.

Examples of the binder of such a coating material include an inorganic binder such as silicon resin, alkoxysilane, colloidal silica, and silicate, an organic-inorganic composite binder such as acrylic silicon resin, and a fluororesin. ..

In the present invention, in particular, the existing coating on the outermost surface includes an inorganic coating (a coating containing the inorganic binder), an organic-inorganic composite coating (a coating containing the organic-inorganic composite binder), and a fluororesin coating (including the fluororesin). It is suitable when it is one or more selected from (coating) and the like, and further, it can be suitably applied to these clear coatings. Such an existing coating may contain a photocatalytic titanium oxide or the like.

The present invention can be applied as a remodeling method when the existing wall surface has deteriorated over time as described above. The degree of aging deterioration is not particularly limited, but a wall surface that has been used for about 5 years or more (further 8 years or more) can be the subject of the present invention.

As the existing wall surface of the present invention, it is preferable that a plurality of plate-shaped wall materials having an uneven pattern on the surface and having a highly durable existing coating are provided side by side. The present invention can obtain an advantageous effect when targeting an existing wall surface composed of such a plurality of plate-shaped wall materials. It is desirable that the uneven pattern is attached to at least the plate-shaped wall material itself. The connecting portion between the plate-shaped wall materials may be filled with a sealing material or a dry joint material.

In the cosmetic method of the present invention, the undercoat material and the topcoat material are sequentially applied (painted) to the existing wall surface that has deteriorated over time as described above.

In the present invention, as the undercoat material, an undercoat material that forms a film having a color tone and / or glossiness different from that of the existing wall surface is used. In the present invention, by using such an undercoat material, the existing wall surface can be covered with the entire uneven pattern of the existing wall surface, that is, the entire existing wall surface including the concave and convex portions of the uneven pattern, and the boundary between the concave and convex portions. It can be confirmed that the undercoat material film is evenly formed along the unevenness, and then by applying the topcoat material, a beautiful new film can be formed while making the best use of the uneven pattern on the existing wall surface, and the finish. The state can be maintained for a long period of time.

The undercoat material that forms a film whose color tone is different from that of the existing wall surface is such that it can be visually recognized that the color tone of the film (undercoat material film) formed after the undercoat material is applied is different from the color tone of the existing wall surface. It should be. As such an undercoat material, a color difference (ΔE) between the existing wall surface and the undercoat material coating is preferably 3 or more, more preferably 5 or more, and further preferably 10 or more. For existing wall surfaces (for example, speckled pattern, grid pattern, etc.) in which a plurality of areas having different color tones are mixed, the color tone of the undercoat material coating is different from the color tone of the area occupying the largest area among those areas. It may be a different color.

The color difference (ΔE) is a value measured using a color difference meter. Specifically, it can be calculated by the following formula from the L ^* value, a ^* value, and b ^* value (average value of 10 measurement points) of the existing wall surface and the undercoat material coating, respectively. The L ^* value, a ^* value, and b ^* value of the undercoat material coating may be measured for the undercoat material coating 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
_{(Wherein, L * 1, a * 1}} , b * 1 are respectively existing wall _{^{L *, a *, b *}} .L * 2, a * 2, b * 2 Each undercoating material coating ^L *, a ^* , B ^* )

As such an undercoat material, for example, a material containing a resin component and a colorant can be used. Among these, as the colorant, for example, a color pigment, a dye, or the like can be used. Examples of the coloring pigment include titanium oxide, zinc oxide, carbon black, graphite, black iron oxide, iron-chromium composite oxide, manganese-bismuth composite oxide, manganese-ittrium composite oxide, and iron-manganese composite oxide. Iron-copper-manganese composite oxide, iron-chromium-cobalt composite oxide, copper-chromium composite oxide, copper-manganese-chromium composite oxide, Bengara, molybdate orange, permanent red, permanent carmine, anthraquinone red, perylene Red, Kinakridon Red, Yellow Iron Oxide, Titanium Yellow, First Yellow, Benzimidazolone Yellow, Chrome Green, Cobalt Green, Phthalocyanine Green, Ultramarine, Navy Blue, Cobalt Blue, Phthalocyanine Blue, Kinakridon Violet, Dioxazine Violet, Metal Pigment, Pearl Examples include pigments. Examples of the dye include acidic dyes, basic dyes, cationic dyes, direct dyes, soluble building dyes, acidic mordant dyes, liquor bath dyes, reactive dyes and the like. By appropriately using one or more of these colorants, the undercoat material can be colored in a desired color tone. The mixing amount of the colorant in the undercoat material is preferably 1 to 500 parts by weight, more preferably 5 to 200 parts by weight, and further preferably 10 to 150 parts by weight with respect to 100 parts by weight of the solid content of the resin component.

The undercoat material that forms a film having a glossiness different from that of the existing wall surface may be such that the glossiness of the film (undercoat material film) can be visually recognized to be different from the glossiness of the existing wall surface. As such an undercoat material, the difference in glossiness between the existing wall surface and the undercoat material coating is preferably 5 or more, more preferably 10 or more, and further preferably 15 or more. For an existing wall surface in which a plurality of regions having different glossiness are mixed, the glossiness of the undercoat material coating may be different from the glossiness of the region occupying the largest area among those regions.

The glossiness is a value measured using a gloss meter. Specifically, it can be obtained from the 60-degree mirror glossiness (average value of 10 measurement points) of each of the existing wall surface and the undercoat material coating. The glossiness of the undercoat material coating may be measured for the undercoat material coating formed on the existing wall surface.

As such an undercoat material, for example, a material containing a resin component and, if necessary, a matting agent can be used. The glossiness of the undercoat material film can be set, for example, by adjusting the type, ratio, and the like of the resin component. The glossiness can also be adjusted by combining two or more kinds of resins. When the undercoat material contains a matting agent, the glossiness can be set by adjusting the type and ratio of the matting agent.

As the matting agent, for example, an extender pigment or the like can be used. Specifically, heavy calcium carbonate, slight calcium carbonate, clay, kaolin, talc, barium carbonate, white carbon, diatomaceous earth, cold water stone, pottery clay, China. Clay, barium powder, barium sulfate, precipitated barium sulfate, silica sand, diatomaceous earth powder, quartz powder, resin beads, glass beads, hollow balloons, zeolite, sodium sulfate, alumina, allophen, vermiculite, pearlite, Otani stone powder, activated clay, charcoal , Activated charcoal, wood flour, barium sulfate and the like. These can be used alone or in combination of two or more.

When the undercoat material contains a matting agent, the mixing amount of the matting agent is preferably 10 to 200 parts by weight, preferably 20 to 120 parts by weight, more preferably 20 parts by weight, based on 100 parts by weight of the solid content of the resin component. It is 35 to 95 parts by weight. When the mixing amount of the matting agent is within such a range, in addition to the gloss adjustment effect, the effect of forming the undercoat material film evenly on the surface of the uneven pattern is further enhanced, and the undercoat material film is formed while making the best use of the uneven pattern. It is easy to do and is suitable.

When the undercoat material contains a pigment such as a coloring pigment and / or an extender pigment, the pigment volume concentration of the undercoat material is preferably 1 to 30%, more preferably 3 to 25%, still more preferably 5 to 23%. , Particularly preferably 8 to 20%. When the pigment volume concentration is within the above range, it is possible to enhance the effect of forming the undercoat material film having excellent adhesion while utilizing the shape of the base material. The pigment volume concentration is a volume percentage of the pigment contained in the dry coating material, and is a value obtained by calculation from the number of parts by weight and the specific gravity of the resin component constituting the undercoat material and the pigment. The specific gravity of the resin component is 1.

As the resin component in the undercoat material, for example, a water-soluble resin, a water-soluble resin such as a water-dispersible resin, a solvent-soluble resin, a non-aqueous resin such as a non-water-dispersible resin, a solvent-free resin, or the like can be used.

Of these, when an aqueous resin is used as the resin component, an aqueous undercoat material can be obtained. The water-based undercoat material contains water as a medium, and if necessary, even if it further contains a water-soluble solvent such as a lower alcohol, a polyhydric alcohol, an ether compound, an ester compound, or an alkylene oxide-containing compound. Good.

When a non-aqueous resin is used as the resin component, a non-aqueous undercoat material can be obtained. The non-aqueous undercoat material contains a non-aqueous solvent as a medium. Examples of the non-aqueous solvent include aliphatic hydrocarbon solvents such as n-heptane, n-hexane, n-pentane, n-octane, n-nonane, n-decane, n-undecane, and n-dodecane, and methylcyclohexane. , Alicyclic hydrocarbon solvents such as ethylcyclohexane, aliphatic hydrocarbon-containing mixed solvents such as mineral spirit, petroleum solvents such as petroleum ether, petroleum naphtha, solvent naphtha, kerosine, etc., isoparaffin solvents, alcohol solvents, etc. , Ether alcohol solvent, ether solvent, ester solvent, ether ester solvent, ketone solvent and the like. These can be used alone or in combination of two or more.

The non-aqueous undercoat material preferably contains a non-aqueous solvent having an aniline point of 12 to 70 ° C. It is considered that such a non-aqueous solvent contributes to the improvement of adhesion by slightly swelling or dissolving the existing coating film. As the non-aqueous solvent having an aniline point of 12 to 70 ° C., for example, one or more selected from an aliphatic hydrocarbon-containing mixed solvent such as mineral spirit, a petroleum-based solvent such as petroleum ether, petroleum naphtha, solvent naphtha, and kerosine may be used. Suitable. The aniline point is a value measured by the method of JIS K2256.

The resin component in the undercoat material is preferably one or more compounds, and at least one of the compounds is preferably a compound having a reactive silyl group. A compound having such a reactive silyl group is considered to contribute to adhesion due to its cross-linking reactivity, and is suitable in terms of improving the effect of the present invention.

The reactive silyl group is, for example, one in which one or more functional groups selected from an alkoxyl group, a hydroxyl group, a phenoxy group, a mercapto group, an amino group, a halogen and the like are bonded to a silicon atom. Of 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 preferable.

Examples of the compound having a reactive silyl group include a tetraalkoxysilane compound, an alkylalkoxysilane compound, a silane coupling agent, a reactive silyl group-containing vinyl compound and the like, or a compound derived from these (for example, a condensate, a modification). Substances, polymers, copolymers, etc.). These can be used alone or in combination of two or more.

Among these, examples of the tetraalkoxysilane compound include tetramethoxysilane, tetraethoxysilane, and tetrabutoxysilane.

Examples of the alkylalkoxysilane compound include methyltrimethoxysilane, methyltriethoxysilane, methyltributoxysilane, ethyltrimethoxysilane, ethyltriethoxysilane, ethyltributoxysilane, propyltrimethoxysilane, propyltriethoxysilane, and butyl. Trimethoxysilane, butyltriethoxysilane, phenyltrimethoxysilane, phenyltriethoxysilane, phenyltributoxysilane, dimethyldimethoxysilane, dimethyldiethoxysilane, dimethyldibutoxysilane, diethyldimethoxysilane, diethyldiethoxysilane, dipropyldimethoxy Examples thereof include silane, dipropyldiethoxysilane, dibutyldimethoxysilane, dibutyldiethoxysilane, diphenyldimethoxysilane, diphenyldiethoxysilane, diphenyldibutoxysilane, methylphenyldimethoxysilane, and methylphenyldiethoxysilane.

Examples of the silane coupling agent include epoxy group-containing silanes such as γ-glycidoxypropylmethyldiethoxysilane, γ-glycidoxypropylmethyltriethoxysilane, and β- (3,4 epoxycyclohexyl) ethyltrimethoxysilane. Coupling agent, N-β (aminoethyl) γ-aminopropylmethyltriethoxysilane, γ-aminopropyltrimethoxysilane, γ-aminopropyltriethoxysilane and other amino group-containing silane coupling agents, as well as isocyanate group-containing Examples thereof include a silane coupling agent, an isocyanurate group-containing silane coupling agent, and an acid anhydride group (carboxyl group) -containing silane coupling agent.

Examples of the reactive silyl group-containing vinyl compound include γ- (meth) acryloxypropyltrimethoxysilane, γ- (meth) acryloxypropyltriethoxysilane, γ- (meth) acryloxipropylmethyldimethoxysilane, and γ-. (Meta) Acryloxypropylmethyldiethoxysilane and the like can be mentioned. Such a reactive silyl group-containing vinyl compound can be used in the form of a resin obtained by copolymerization with other monomers (for example, acrylic silicone resin). Examples of such monomers include (meth) acrylic acid alkyl esters, hydroxyl group-containing monomers, carboxyl group-containing monomers, amino group-containing monomers, pyridine-based monomers, nitrile group-containing monomers, amide group-containing monomers, and epoxy group-containing monomers. Examples thereof include a carbonyl group-containing monomer, a fluorine-containing monomer, an aromatic monomer, an ultraviolet-absorbing group-containing monomer, and a photostable group-containing monomer. These can be used alone or in combination of two or more. In the present invention, the acrylic acid alkyl ester and the methacrylic acid alkyl ester are collectively referred to as (meth) acrylic acid alkyl ester. Monomer is a general term for compounds having a polymerizable unsaturated double bond.

The resin component in the undercoat material can contain a compound other than the compound having a reactive silyl group. As such a compound, for example, various resins such as acrylic resin, polyester resin, polyether resin, polyurethane resin, fluororesin, vinyl acetate resin, epoxy resin, vinyl chloride resin, or these resins can be produced. Various compounds and the like can be mentioned.

As an example of the mode of the resin component of the undercoat material, modes (1) to (4) are shown below.

(1) When a resin obtained by copolymerizing at least a reactive silyl group-containing vinyl compound and a hydroxyl group-containing monomer is used as the resin containing the reactive silyl group-containing vinyl compound in the resin constituents, such a resin. Can be used in combination with, for example, a polyisocyanate compound (described later).

(2) When a resin obtained by copolymerizing at least a reactive silyl group-containing vinyl compound and an epoxy group-containing monomer is used as the resin containing the reactive silyl group-containing vinyl compound in the resin constituents, such as this. The resin can be used in combination with, for example, a polyamine compound (described later).

(3) Examples of the resin component in the undercoat material include the embodiment (3) containing a polyol compound, a polyisocyanate compound, and a compound having a reactive silyl group.

Examples of the polyol compound in this aspect (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 a value represented by the number of mg of potassium hydroxide equimolar to the hydroxyl group contained in 1 g of the resin solid content.

In aspect (3), it is desirable to include an acrylic polyol (hydroxyl group-containing acrylic resin) as the polyol compound. As the acrylic polyol, a (meth) acrylic acid alkyl ester, a hydroxyl group-containing monomer, and if necessary, other monomers are contained as resin constituent components, and a polymer obtained by polymerizing these can be used. As the (meth) acrylic acid alkyl ester and the hydroxyl group-containing monomer, the same ones as described above can be used. Examples of the other monomers include carboxyl group-containing monomers, amino group-containing monomers, pyridine-based monomers, nitrile group-containing monomers, amide group-containing monomers, epoxy group-containing monomers, carbonyl group-containing monomers, alkoxysilyl group-containing monomers, and aromatics. Examples thereof include a group monomer, an ultraviolet absorbing group-containing monomer, and a photostable group-containing monomer. These can be used alone or in combination of two or more.

The polyisocyanate compound has two or more isocyanate groups in one molecule, and crosslinks with the polyol compound to form a polyurethane resin film. Examples of the polyisocyanate compound include toluene diisocyanate (TDI), 4,4-diphenylmethane diisocyanate (pure-MDI), polypeptide MDI, xylylene diisocyanate (XDI), hexamethylene diisocyanate (HMDI), isophorone diisocyanate (IPDI), and water. Addition XDI, hydrogenation MDI, etc., or derivatives thereof (for example, compounds obtained by a urethanization reaction, an allophanation reaction, an isocyanurateization reaction, etc.) include those having an allophanate group, an allophanate group, and an isocyanurate group. You can also use what you have. These can be used alone or in combination of two or more.

The mixing ratio of the polyisocyanate compound may be set in consideration of the equivalent ratio of the isocyanate groups of the polyisocyanate compound to the hydroxyl group of the hydroxyl group-containing resin, that is, 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 effect of the present invention can be sufficiently obtained.

As the compound having a reactive silyl group in the aspect (3), the same compounds as those described above can be used.

(4) Examples of the resin component in the undercoat material include an embodiment (4) containing an epoxy resin, a polyamine compound, and a compound having a reactive silyl group.

In this aspect (4), an epoxy resin can be used. Examples of such an epoxy resin include a flexible epoxy resin and a hard epoxy resin. If the epoxy resin contains at least a flexible epoxy resin, it is preferable in terms of improving the effect of the present invention, and the existing wall surface is a case where the connecting portion between the plate-shaped wall materials is filled with a sealing material. It is also possible to obtain an advantageous effect in such cases.

Examples of the flexible epoxy resin include aliphatic-modified epoxy resin, butadiene-based epoxy resin, ε-caprolactone-modified epoxy resin, thiol-based epoxy resin, amine-modified epoxy resin, rubber-modified epoxy resin, urethane-modified epoxy resin, and polyol-modified. Examples thereof include epoxy resins and fatty acid-modified epoxy resins. These can be used alone or in combination of two or more. Of these, fatty acid-modified epoxy resins are preferable.

The ratio (in terms of solid content) of the flexible epoxy resin to the epoxy resin of the aspect (4) is preferably 50% by weight or more, more preferably 70 to 100, from the viewpoint of adhesion to the substrate, followability, and the like. By weight%.

The fatty acid-modified epoxy resin is obtained by adding an aliphatic polybasic acid compound to the epoxy resin. For the addition reaction, for example, an esterification reaction or the like can be used. As the epoxy resin used here, for example, various epoxy resins such as bisphenol A type epoxy resin, bisphenol F type epoxy resin, and other hard epoxy resins described later can be used. Examples of the aliphatic polybasic acid compound include maleic acid, maleic anhydride, fumaric acid, itaconic acid, itaconic anhydride, citraconic acid, tetrahydrophthalic acid, tetrahydrophthalic anhydride, hexahydrophthalic acid, and hexahydrophthalic acid. Cyclohexanedicarboxylic acid, succinic acid, malonic acid, glutaric acid, adipic acid, azelaic acid, sebacic acid, 1,12-docane diic acid, dimer acid and the like can be mentioned. Of these, dimer acid is preferable.

Dimer acid is a dimer of unsaturated fatty acids. Examples of unsaturated fatty acids constituting dimer acid include oleic acid, elaidic acid, setreic acid, sorbic acid, linoleic acid, linoleic acid, arachidonic acid, soybean oil fatty acid, tall oil fatty acid, and flaxseed oil fatty acid.

The dimer acid-modified epoxy resin obtained by adding and reacting dimer acid to an epoxy resin is suitable as an epoxy resin for an undercoat material. The ratio of the dimer acid-modified epoxy resin to the epoxy resin of the undercoat material (in terms of solid content) is preferably 50% by weight or more, more preferably 70 to 100% by weight, from the viewpoint of adhesion to the substrate, followability, and the like. Is.

Examples of the hard epoxy resin include bisphenol type epoxy resin such as bisphenol A type epoxy resin and bisphenol F type epoxy resin, phenol novolac type epoxy resin such as phenol novolac type bisphenol A epoxy resin, and phenol novolac type bisphenol F epoxy resin, and cresol. Novolak type epoxy resin, bisphenol A Novolak type epoxy resin, etc. Novolak type epoxy resin, alicyclic epoxy resin, hydrogenated bisphenol A type epoxy resin, bisphenol ether type epoxy resin, bisphenol S type epoxy resin, biphenyl type epoxy resin, Examples thereof include dicyclo-type epoxy resin and naphthalene-type epoxy resin. These can be used alone or in combination of two or more.

The epoxy resin of aspect (4) preferably has an epoxy equivalent (per solid content) of 300 to 3000 g / eq, more preferably 400 to 2000 g / eq, still more preferably 450 to 1500 g / eq, and particularly preferably 500 to 1100 g. / Eq. When the epoxy equivalent is at least the above lower limit, it is suitable in terms of followability to the substrate, adhesion, and the like. When the epoxy equivalent is not more than the above upper limit, it is suitable in terms of swelling resistance, adhesion, suitability for topcoat material, and the like. The epoxy equivalent is a value obtained by dividing the molecular weight of the epoxy resin by the number of epoxy groups.

The polyamine compound in the aspect (4) has two or more amino groups in one molecule, and crosslinks with the epoxy resin to form an epoxy resin film. Examples of the polyamine compound include aliphatic polyamines, alicyclic polyamines, aromatic polyamines, heterocyclic polyamines, aliphatic polyamides, alicyclic polyamides, aromatic polyamides, aliphatic polyamide amines, alicyclic polyamide amines, and aromatics. Examples thereof include polyamine compounds such as polyamide amine. These can be used alone or in combination of two or more. Among these, one or more polyamine compounds selected from aliphatic polyamines, aliphatic polyamides, and aliphatic polyamide amines can be preferably used.

Such a polyamine compound preferably has 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. When the active hydrogen equivalent is within the above range, a sufficient effect can be obtained in terms of adhesion and the like. The active hydrogen equivalent is a value obtained by dividing the molecular weight of the polyamine compound by the number of hydrogen atoms of the amino group.

In aspect (4), for the epoxy resin and the polyamine compound, the active hydrogen equivalent of the polyamine compound and the epoxy equivalent of the epoxy resin are [active hydrogen equivalent of the polyamine compound / epoxy equivalent of the epoxy resin], preferably less than 0.4. Each material can be set and used in a combination of more preferably 0.01 to 0.3, further preferably 0.03 to 0.25, and particularly preferably 0.05 to 0.2. By using a combination of materials satisfying such conditions as the epoxy resin and the polyamine compound, more preferable effects can be obtained in terms of adhesion and the like.

The blending ratio of the epoxy resin and the polyamine compound is set to 1.0 or less in [(blending amount of polyamine compound / active hydrogen equivalent of polyamine compound) / (blending amount of epoxy resin / epoxy equivalent of epoxy resin)]. It is preferably 0.2 to 1.0, more preferably 0.4 to 0.98, particularly preferably 0.6 to 0.95, and most preferably 0.7 to 0.9. .. The blending amount and active hydrogen equivalent of the amine curing agent, and the blending amount and epoxy equivalent of the epoxy resin are all based on the solid content. When the compounding ratio of the epoxy resin and the polyamine compound is not more than the above upper limit, it is suitable in terms of adhesion, substrate followability, suitability for topcoat material, etc., and when it is more than the above lower limit, curability, adhesion, etc. It is suitable in terms of points.

As the compound having a reactive silyl group in the aspect (4), the same compounds as those described above can be used. In the aspect (4), a silane coupling agent is suitable, and in particular, one or more selected from an epoxy group-containing silane coupling agent and an amino group-containing silane coupling agent can be preferably used.

In the aspect (4), the solid content weight ratio (polyamine compound: silane coupling agent) of the polyamine compound and the silane coupling agent is preferably 10:90 to 90:10, more preferably 12:88 to It is 80:20, more preferably 14:86 to 65:35, and particularly preferably 15:85 to 50:50. By using both components in such a ratio, the adhesion can be further improved. It is particularly suitable for water-based undercoat materials.

The undercoat material in the present invention preferably contains 0.1 to 30% by weight, more preferably 0.2 to 25% by weight, and further preferably 0.3 to 20% by weight in terms of SiO _{2 in} the solid content of the resin component. Within the above range, a compound having a reactive silyl group can be included. When the mixing ratio of the compound having a reactive silyl group is within such a range, the adhesion between the existing coating and the undercoat material coating and the adhesion between the undercoat material coating and the topcoat material coating can be further improved. It is also suitable in terms of preventing cracking of the undercoat material coating and the topcoat material coating.

The SiO ₂ conversion is expressed by the weight of a compound having a Si—O bond remaining as silica (SiO ₂ ) when it is completely hydrolyzed and then calcined at 900 ° C. In general, tetraalkoxysilanes, alkylalkoxysilanes and the like have the property of reacting with water to undergo a hydrolysis reaction to form silanols, and further causing a condensation reaction between silanols or silanols and alkoxy. When this reaction is carried out to the ultimate, it becomes silica (SiO ₂ ). These reactions
RO (Si (OR) ₂ O) _n R + (n + 1) H ₂ O → nSiO ₂ + (2n + 2) ROH
(R indicates an alkyl group. N is an integer.)
It is expressed by the reaction formula. The SiO ₂ conversion in the present invention is a conversion of the amount of the silica component remaining based on this reaction formula.

The primer can include a thickener. Examples of the thickener include organic bentonite, fine powder silica, surface-treated calcium carbonate, amido wax, hydrogenated castor oil wax, benzylidene sorbitol, metal soap, polyethylene oxide, polymerized vegetable oil, polycarboxylic acid amine salt, xanthan gum, and guar gum. Examples thereof include polyacrylic acid compounds, polyvinyl alcohols, polyethylene oxides, urethane-modified polyether compounds and the like. These can be used alone or in combination of two or more.

The mixed amount (solid content) of the thickener is preferably 0.1 to 10 parts by weight, more preferably 0.2 to 5 parts by weight, based on 100 parts by weight of the solid content of the resin component. When the mixing amount of the thickener is within such a range, the undercoat material can be easily applied evenly along the unevenness of the existing wall surface, sufficient adhesion can be ensured, and the effect of the present invention is stabilized. Can be obtained.

The non-volatile content (at the time of coating) of the undercoat material is preferably 30 to 90% by weight, preferably 40 to 80% by weight, and more preferably 45 to 75% by weight. When the non-volatile content of the undercoat material is in such a ratio, the effect of evenly applying the undercoat material along the unevenness of the existing wall surface can be enhanced. The non-volatile content is a value measured by the method of JIS K5601-1-2, and the heating temperature is 105 ° C. and the heating time is 60 minutes.

The undercoat material may contain various components other than the above components as long as the effects of the present invention are not significantly impaired. Such components include, for example, aggregates, dyes, dehydrating agents, leveling agents, wetting agents, plasticizers, film-forming aids, antifreeze agents, preservatives, fungicides, algae-proofing agents, antibacterial agents, dispersions. Examples thereof include agents, antifoaming agents, adsorbents, fibers, cross-linking agents, ultraviolet absorbers, light stabilizers, antioxidants, curing catalysts and the like. Among these, examples of the curing catalyst include organotin compounds, organoaluminum compounds, organotitanate compounds, acidic compounds, amine compounds, and alkaline compounds. The undercoat material of the present invention can be produced by uniformly mixing the above-mentioned various components by a conventional method. The form of the undercoat material can be, for example, a one-component type, a two-component type, or a multi-component type.

The undercoat material can be directly applied to the existing wall surface, but various pretreatments can be performed if necessary. Examples of the pretreatment include removal of an existing coating film that is significantly deteriorated, removal of contaminants by high-pressure water washing, repair with putty, filler, etc., restoration of the surface shape, and the like. When a new sealing material is placed on the existing wall surface, it is desirable to apply the undercoat material approximately 2 to 10 days after the sealing material is placed.

A known coating tool can be used for coating the undercoat material. As the painting tool, for example, a spray, a roller, a brush, a trowel and the like can be used.
The amount of the undercoat material to be applied may be appropriately set according to the surface shape of the existing wall surface, the coating equipment to be used, etc., but is preferably 0.03 to 0.5 kg / m ² , more preferably 0.05 to 0. .3 kg / m ² . The undercoat material can be appropriately diluted at the time of painting.

The viscosity of the undercoat material at the time of coating is preferably 0.1 to 10 Pa · s, and more preferably 0.2 to 5 Pa · s. When the viscosity of the undercoat material is within such a range, the effect of the present invention can be stably obtained. The viscosity referred to here is a value obtained by measuring the viscosity at 20 rpm (guideline value at the fourth rotation) with a BH type viscometer, and the measurement temperature is 23 ° C.

The drying time of the undercoat material is preferably 1 hour or longer, more preferably 2 to 200 hours at room temperature (0 to 40 ° C.).

In the present invention, the topcoat material is applied after the above-mentioned undercoat material is applied and dried. As the topcoat material in the present invention, a material capable of utilizing the uneven pattern of the existing wall surface is suitable. As the topcoat material that can be specifically used, for example, a transparent topcoat material, a colored topcoat material, or the like can be used. The transparent topcoat material contains a resin component, and the film thereof exhibits transparency. The transparent topcoat material may form a colored transparent film, and such a transparent topcoat material may contain a coloring pigment or the like within a range that does not impair the transparency in addition to the resin component. .. Examples of the coloring topcoat material include those containing a resin component and a coloring pigment.

Various resins can be used as the resin component in the topcoat material. Examples of the type of resin include vinyl acetate resin, polyester resin, alkyd resin, vinyl chloride resin, epoxy resin, acrylic resin, urethane resin, acrylic silicon resin, fluororesin, and the like, or a composite resin thereof. Among these, one or more selected from acrylic resin, urethane resin, acrylic silicone resin, fluororesin and the like are preferable. Examples of such resin components include water-soluble resins, water-dispersible resins (resin emulsions), solvent-soluble resins, solvent-free resins, non-aqueous dispersion resins, powder resins, and the like. Among them, one or more selected from water-soluble resins, water-dispersible resins, solvent-soluble resins, and non-aqueous dispersion resins are preferable. Moreover, these resin components may have a cross-linking reactivity. When a resin component having crosslink reactivity is used, the durability, water resistance, weather resistance, chemical resistance, adhesion and the like of the coating film can be improved.

As the coloring pigment, for example, known inorganic coloring pigments, organic coloring pigments and the like can be used. By appropriately using one or more of these coloring pigments, the topcoat material can be set to a desired color tone. The mixing ratio of the coloring pigment in the coloring topcoat material is preferably 1 to 500 parts by weight, more preferably 5 to 200 parts by weight, and further preferably 10 to 150 parts by weight with respect to 100 parts by weight of the solid content of the resin component. ..

Such a topcoat material may contain various components other than the above components 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, fungicides, algae-proofing agents, and antibacterial agents. Agents, dispersants, defoaming agents, adsorbents, fibers, cross-linking agents, UV absorbers, light stabilizers, antioxidants, low pollutants, hydrophilic agents, water repellents, catalysts, solvents, water, etc. Be done. The topcoat material of the present invention can be produced by uniformly mixing the above-mentioned resin component, coloring pigment, and if necessary, the above-mentioned various components by a conventional method. The form of the topcoat material can be, for example, a one-component type, a two-component type, or a multi-component type. Examples of the degree of gloss of the topcoat material include glossy, 7-minute gloss, 5-minute gloss, 3-minute gloss, and matte.

A known coating tool can be used for coating the topcoat material. As the painting tool, for example, a spray, a roller, a brush or the like can be used.
The amount of the topcoat material applied may be appropriately set according to the surface shape of the existing wall surface, the type of the topcoat material, the type of the coating tool, etc., but is preferably 0.05 to 0.5 kg / m ² , more preferably. It is 0.1 to 0.4 kg / m ² . At the time of painting, the topcoat material can be appropriately diluted if necessary.

In the present invention, one kind or two or more kinds of topcoat materials can be used. When two or more types of topcoat materials are used, it is possible to finish the appearance of two or more colors by using topcoat materials having different color tones and performing different coatings.

Examples are shown below to clarify the features of the present invention.

[Test Example 1]
In Test Example 1, the following undercoat materials 1-1 to 1-4 were prepared as the undercoat materials, and the test was conducted using these undercoat materials.

(Undercoat material 1-1)
Non-aqueous dispersion acrylic polyol {hydroxyl value: 50KOHmg / g, weight average molecular weight: 70000, glass transition temperature: 38 ° C, solid content: 50% by weight, medium: mineral spirit (aniline point 42 ° C)}, colorant (oxidation) Titanium, specific gravity: 4.2), amide wax, solvent naphtha (aniline point: 13 ° C), and main agent containing silicone defoamer,
With a curing agent containing a polyisocyanate compound (1,6-diisocyanatohexane derivative, solid content: 100% by weight), a tetraalkoxysilane compound (isobutyl alcohol modified product of a tetramethoxysilane condensate), and a mineral spirit (same as above). (NCO / OH ratio 1.0).
Pigment volume concentration 13%, non-volatile content of undercoat material: 58% by weight, ratio of compound having reactive silyl group in resin solid content (SiO ₂ conversion): 3% by weight, colorant amount: solid content of resin component 100% by weight 60 parts by weight with respect to the portion, amount of thickener: 1 part by weight with respect to 100 parts by weight of the solid content of the resin component.

(Undercoat material 1-2)
A main agent containing a non-aqueous dispersion acrylic polyol (same as above), a matting agent (white carbon, specific gravity: 2.0), amido wax, solvent naphtha (same as above), and a silicone-based defoaming agent.
A mixture (NCO / OH ratio: 1.0) with a curing agent containing a polyisocyanate compound (same as above), a tetraalkoxysilane compound (same as above), and a mineral spirit (same as above).
Pigment volume concentration 16%, non-volatile content of undercoat material: 53% by weight, ratio of compounds having reactive silyl group in resin solid content (SiO ₂ conversion): 3% by weight, amount of matting agent: solid content of resin component 100 38 parts by weight with respect to parts by weight, amount of thickener: 1 part by weight with respect to 100 parts by weight of solid content of the resin component.

(Undercoat material 1-3)
A main agent containing a non-aqueous dispersion acrylic polyol (same as above), a colorant (same as above), amido wax, solvent naphtha (same as above), and a silicone-based defoamer,
A mixture (NCO / OH ratio: 1.0) with a curing agent containing a polyisocyanate compound (same as above), a tetraalkoxysilane compound (same as above), and a mineral spirit (same as above).
Pigment volume concentration 13%, non-volatile content of undercoat material: 58% by weight, ratio of compound having reactive silyl group in resin solid content (SiO ₂ conversion): 0.2% by weight, colorant amount: solid content of resin component 60 parts by weight with respect to 100 parts by weight, amount of thickener: 1 part by weight with respect to 100 parts by weight of solid content of the resin component.

(Undercoat material 1-4)
A main agent containing a non-aqueous dispersion acrylic polyol (same as above), amido wax, solvent naphtha, and a silicone-based defoamer,
A mixture of a polyisocyanate compound (same as above), a tetraalkoxysilane compound (same as above), and a curing agent containing a mineral spirit (NCO / OH ratio: 1.0).
Pigment volume concentration 0%, non-volatile content of undercoat material: 58% by weight, ratio of compounds having reactive silyl group in resin solid content (SiO ₂ conversion): 0.2% by weight, thickener amount: solid resin component 1 part by weight for 100 parts by weight per minute.

(Test Example 1-1)
○ Test i
As an existing wall surface, a brown ceramic siding boat that has deteriorated due to outdoor exposure (the surface has convex and concave parts (joints) with tile joints, and the convex parts have an irregular uneven pattern, and the outermost coating film is inorganic. Those having a clear film) were prepared. The entire surface of the existing wall surface was spray-coated with an undercoat material 1-1 at a coating amount of 0.1 kg / m ² and dried. Here, the coating material of the undercoat material 1-1 has a color tone different from that of the existing wall surface (color difference 38), and it is easy to confirm that the undercoat material coating is evenly formed on the entire uneven pattern of the existing wall surface. I was able to do it. Next, a top coat material (brown acrylic silicone resin paint) was spray-coated at a coating amount of 0.2 kg / m ² , and dried and cured for 7 days to prepare a test piece. The painting and curing steps were all carried out under standard conditions (temperature 23 ° C., relative humidity 50%).

The test piece prepared by the above method was exposed to an accelerated weather resistance tester (metal weather; manufactured by Daiprawintes Co., Ltd.) for 500 hours, and changes in the appearance (floating and peeling state) of the surface of the test piece were observed. Next, a cross cut was made in the coating film of each part of the uneven pattern with a cutter knife, and the adhesiveness was confirmed by attaching a tape to the cross cut portion and peeling it off. As a result, in Test Example 1-1, there was no change in appearance due to the accelerated weather resistance test, and no peeling was observed at any site.

○ Test ii
As an existing wall surface, a brown ceramic siding boat that has deteriorated due to outdoor exposure (the surface has convex and concave parts (joints) with tile joints, and the convex parts have an irregular uneven pattern, and the outermost layer is a fluororesin. Those having a clear coating) were prepared. Using this existing wall surface, a test body was prepared and tested in the same manner as in Test i.

○ Test iii
As an existing wall surface, a brown ceramic siding boat that has deteriorated due to outdoor exposure (the surface has convex and concave parts (joints) with tile joints, and the convex parts have an irregular uneven pattern, and acrylic silicon as the outermost layer coating. Those having a resin colored film) were prepared. Using this existing wall surface, a test body was prepared and tested in the same manner as in Test i.

The test results are shown in Table 1. In Table 1, regarding the state after coating the undercoat material, the one having a color difference of 10 or more or a glossiness difference of 15 or more between the existing wall surface and the undercoat material coating is “A”, and the color difference between the existing wall surface and the undercoat material coating is 5. "B" for those with a glossiness difference of 10 or more and less than 15 or less than 15; "C" for those with a color difference of 3 or more and less than 5 or a glossiness difference of 5 or more and less than 10 between the existing wall surface and the undercoat material coating. When the color difference between the wall surface and the undercoat material coating was less than 3 or the glossiness difference was less than 5, it was defined as "D" (excellent: A> B> C> D: inferior). The evaluation in the accelerated weather resistance test was "A" for those with no change in appearance and no peeling at any site, and those with clear change in appearance or many peeling. There were 4 stages (excellent: A> B> C> D: inferior) with "D".

(Test Example 1-2)
A test body was prepared in the same manner as in Test Example 1-1 except that the undercoat material 1-2 was used instead of the undercoat material 1-1. After coating the undercoat material 1-2, the coating of the undercoat material 1-2 has a different glossiness from the existing wall surface (gloss difference 42), and the undercoat material coating is evenly applied to the entire uneven pattern of the existing wall surface. It was possible to easily confirm that it was formed. Further, in Test Example 1-2, there was no change in appearance due to the accelerated weather resistance test, and no peeling was observed at any site.

(Test Example 1-3)
A test body was prepared in the same manner as in Test Example 1-1 except that the undercoat material 1-3 was used instead of the undercoat material 1-1. After coating the undercoat material 1-3, the coating material of the undercoat material 1-3 had a color tone different from that of the existing wall surface (color difference 38), and the undercoat material coating was evenly formed on the entire uneven pattern of the existing wall surface. Was easily confirmed. Further, in Test Examples 1-3, there was no change in appearance in the accelerated weather resistance test, which was generally good, but some peeling was observed.

(Test Example 1-4)
When a test piece was prepared in the same manner as in Test Example 1-1 except that the undercoat material 1-4 was used instead of the undercoat material 1-1, it was formed after coating the existing coating material and the undercoat material 1-4. No difference in color tone or glossiness was observed with the film, and it was not easy to confirm that the undercoat material film was evenly formed on the entire uneven pattern on the existing wall surface. Further, in Test Examples 1-4, peeling was observed in the accelerated weather resistance test.

Test Examples 1-1 to 1-3 corresponded to Examples, and the results were generally better than those of Test Examples 1-4 (corresponding to Comparative Examples).

[Test Example 2]
In Test Example 2, as the undercoat material, the following main agents Q1 to Q7 and the curing agents R1 to R5 were combined to prepare an undercoat material 2-1 to 2-12, and the test was conducted using these undercoat materials.

(Main agent Q1)
Epoxy resin a {Dimeric acid-modified epoxy resin solution, solid content: 60% by weight, epoxy equivalent (per solid content): 780 g / eq, medium: mineral spirit (aniline point 42 ° C.) and solvent naphtha (aniline point 13 ° C.)} 75 parts by weight of colorant (titanium oxide, specific gravity: 4.2) 18 parts by weight, solvent naphtha (same as above) 4 parts by weight, additive (dispersant, thickener, and defoaming agent) 4 parts by weight The main agent Q1 was produced by uniformly mixing with.

(Main agent Q2)
Epoxy resin a (same as above) 62 parts by weight, colorant (same as above) 30 parts by weight, solvent naphtha (same as above) 4 parts by weight, additives (dispersant, thickener, and defoamer) 4 parts by weight And mixed uniformly to produce the main agent Q2.

(Main agent Q3)
Epoxy resin a (same as above) 55 parts by weight, colorant (same as above) 35 parts by weight, solvent naphtha (same as above) 6 parts by weight, additives (dispersant, thickener, and defoamer) 4 parts by weight And mixed uniformly to produce the main agent Q3.

(Main agent Q4)
Epoxy resin a (same as above) 38 parts by weight, colorant (same as above) 15 parts by weight, heavy calcium carbonate (specific gravity 2.7) 30 parts by weight, solvent naphtha (same as above) 12 parts by weight, additive (dispersant, thickening agent) Agent and antifoaming agent) 5 parts by weight were uniformly mixed by a conventional method to produce a main agent Q4.

(Main agent Q5)
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) were uniformly mixed by a conventional method to produce a main agent Q5.

(Main agent Q6)
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) were uniformly mixed by a conventional method to produce a main agent Q6.

(Main agent Q7)
Epoxy resin b {Aqueous epoxy resin (aqueous dispersion of bisphenol A type epoxy resin), solid content: 45% by weight, epoxy equivalent (per solid content) 510 g / eq, medium: water} 60 parts by weight, colorant (same as above) 25 parts by weight, 3 parts by weight of an ether solvent, and 2 parts by weight of an additive (dispersant, thickener, and antifoaming agent) were uniformly mixed by a conventional method to produce a main agent Q7.

(Hardener R1)
Polyamine compound a {aliphatic polyamideamine, solid content: 100% by weight, active hydrogen equivalent (per solid content): 80 g / eq} 15 parts by weight, silane compound {N- (2-aminoethyl) -3-aminopropylmethyl 4 parts by weight of dimethoxysilane}, 16 parts by weight of an alcohol solvent, and 65 parts by weight of solvent naphtha (same as above) were uniformly mixed by a conventional method to produce a curing agent R1.

(Hardener R2)
15 parts by weight of the polyamine compound a (same as above), 16 parts by weight of the alcohol solvent, and 69 parts by weight of the solvent naphtha (same as above) were uniformly mixed by a conventional method to produce a curing agent R2.

(Hardener R3)
Polyamine compound b {aliphatic polyamideamine, solid content: 100% by weight, active hydrogen equivalent (per solid content): 180 g / eq} 25 parts by weight, silane compound (same as above) 4 parts by weight, alcohol solvent 11 parts by weight, solvent 60 parts by weight of naphtha (same as above) was uniformly mixed by a conventional method to produce a curing agent R3.

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

(Hardener R5)
75 parts by weight of the polyamine compound c (same as above) and 25 parts by weight of the silane compound (same as above) were uniformly mixed by a conventional method to produce a curing agent R5.

(Undercoat material 2-1)
The main agent Q1 (100 parts by weight) and the curing agent R1 (25 parts by weight) were uniformly mixed to prepare an undercoat material 2-1. Each characteristic value of this undercoat material is as shown in Table 1.
Blending ratio of epoxy resin and amine curing agent [(blending amount of polyamine compound / active hydrogen equivalent of polyamine compound) / (blending amount of epoxy resin / epoxy equivalent of epoxy resin)] (denoted as "blending ratio" in Table 1) Is 0.81,
Pigment volume concentration 8%,
The non-volatile content of the undercoat material (denoted as "non-volatile content" in Table 2) is 54% by weight.
The ratio of compounds having a reactive silyl group in the resin solid content (SiO ₂ conversion, expressed as "SiO ₂ conversion amount" in Table 2) is 0.5% by weight.
The amount of colorant is 36 parts by weight with respect to 100 parts by weight of the solid content of the resin component.
The amount of thickener (solid content) is 1.6 parts by weight with respect to 100 parts by weight of the solid content of the resin component.

(Undercoat material 2-2)
The main agent Q2 (100 parts by weight) and the curing agent R1 (20 parts by weight) were uniformly mixed to prepare an undercoat material 2-2. The characteristic values of the undercoat material 2-2 are as shown in Table 2.

(Undercoat material 2-3)
The main agent Q3 (100 parts by weight) and the curing agent R1 (18 parts by weight) were uniformly mixed to prepare an undercoat material 2-3. Each characteristic value of the undercoat material 2-3 is as shown in Table 2.

(Undercoat material 2-4)
The main agent Q2 (100 parts by weight) and the curing agent R1 (22 parts by weight) were uniformly mixed to prepare an undercoat material 2-4. Each characteristic value of the undercoat material 2-4 is as shown in Table 2.

(Undercoat material 2-5)
The main agent Q2 (100 parts by weight) and the curing agent R1 (30 parts by weight) were uniformly mixed to prepare an undercoat material 2-5. The characteristic values of the undercoat material 2-5 are as shown in Table 2.

(Undercoat material 2-6)
The main agent Q2 (100 parts by weight) and the curing agent R2 (20 parts by weight) were uniformly mixed to prepare an undercoat material 2-6. The characteristic values of the undercoat material 2-6 are as shown in Table 2.

(Undercoat material 2-7)
The main agent Q2 (100 parts by weight) and the curing agent R3 (28 parts by weight) were uniformly mixed to prepare an undercoat material 2-7. Each characteristic value of the undercoat material 2-7 is as shown in Table 2.

(Undercoat material 2-8)
The main agent Q4 (100 parts by weight) and the curing agent R3 (16 parts by weight) were uniformly mixed to prepare an undercoat material 2-8. Each characteristic value of the undercoat material 2-8 is as shown in Table 2.

(Undercoat material 2-9)
The main agent Q5 (100 parts by weight) and the curing agent R3 (28 parts by weight) were uniformly mixed to prepare an undercoat material 2-9. The characteristic values of the undercoat material 2-9 are as shown in Table 2.

(Undercoat material 2-10)
The main agent Q6 (100 parts by weight) and the curing agent R3 (17 parts by weight) were uniformly mixed to prepare an undercoat material 2-10. The characteristic values of the undercoat material 2-10 are as shown in Table 2.

(Undercoat material 2-11)
The main agent Q7 (100 parts by weight) and the curing agent R4 (20 parts by weight) were uniformly mixed to prepare an undercoat material 2-11. Each characteristic value of the undercoat material 2-11 is as shown in Table 2.

(Undercoat material 2-12)
The main agent Q7 (100 parts by weight) and the curing agent R5 (10 parts by weight) were uniformly mixed to prepare an undercoat material 2-12. The characteristic values of the undercoat material 2-12 are as shown in Table 2.

(Test Examples 2-1 to 2-12)
A test body was prepared and tested in the same manner as in Test Example 1-1 except that each of the undercoat materials 2-1 to 2-12 was used instead of the undercoat material 1-1. The test results are shown in Table 3. Of these, in Test Examples 2-1 to 2-8, 2-11, and 2-12 (corresponding to Examples), the color tone of the undercoat material coating is different from the color tone of the existing wall surface, and the color tone of the existing wall surface is different. It could be easily confirmed that the undercoat material film was evenly formed on the entire uneven pattern, and the results were generally better than those of Test Examples 2-9 and 2-10 (corresponding to Comparative Examples).

Claims (2)

It is a method of making up existing walls that have deteriorated over time.
The existing wall surface has an uneven pattern on the surface and has an uneven pattern.
It is provided with at least one existing coating selected from an inorganic coating, an organic-inorganic composite coating, and a fluororesin coating.
For the above existing wall surface
A cosmetic method characterized by applying an undercoat material that forms a film having a color tone and / or glossiness different from that of the existing wall surface, drying the film, and then applying a topcoat material. The cosmetic method according to claim 1, wherein the existing wall surface has an uneven pattern on the surface and is composed of a plurality of plate-shaped wall materials having an existing coating film.