JP3041189B2 - Aqueous basement conditioning material and method for finishing building exterior walls using it - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aqueous base preparation material composition for use in the finishing of a building exterior wall and a method for constructing an exterior wall, and in particular, has excellent adhesion to the foundation and suitability for top coating, and can shorten the construction process. And a method for finishing an outer wall.

[0002]

2. Description of the Related Art Conventionally, in a method of finishing an outer wall of a building, it is usual to perform base adjustment on various base surfaces. This is because when the properties of the respective bases are different, or when the bases have defects such as cracks or irregularities, it may not be appropriate to apply the finish coating material as it is. As such a base adjustment material,
Synthetic resin emulsion sealer, synthetic resin solvent-based sealer, synthetic resin putty, cement-based base adjustment coating material,
An example is a synthetic resin emulsion-based base adjustment coating material.
First, a synthetic resin emulsion sealer is used for applying to a base to suppress suction of the finish coating material to the base and to enhance adhesion. It is necessary to be excellent in alkali resistance and film forming property, and an acrylic synthetic resin emulsion, a vinyl acetate synthetic resin emulsion, an epoxy synthetic resin emulsion, and a chlorinated rubber synthetic resin emulsion are mainly used. The synthetic resin solvent-based sealer is used for the same purpose as described above. It is characterized by good alkali resistance and better adhesion to the substrate. A one-pack type synthetic resin solution such as an acrylic type, a vinyl chloride type or a chlorinated rubber type, or a two-part reaction type synthetic resin solution such as an epoxy type is mainly used. However, in the case of the two-pack reaction type, it is necessary to pay attention to the process interval time. Synthetic resin putty is divided into synthetic resin emulsion putty and synthetic resin solvent-based putty. The synthetic resin emulsion putty is a putty made by adding a pigment, an inorganic filler, and a thickener to an acrylic or vinyl acetate synthetic resin emulsion, and preferably has a small crack or thin skin upon drying. This is not used for outdoor ground preparation because it swells and deteriorates its adhesion when repeatedly affected by water. The synthetic resin solvent-based putty is used for adjusting the base of a synthetic resin solvent-based finishing material. Cement-based ground-adjustment coating material is prepared by mixing a cement paste with a polymer dispersion for cement admixture at the factory, or a powder consisting of cement, fine aggregate, and inorganic admixture, and a polymer dispersion for cement admixture on site. There is a type of mixing. Generally used for adjustment of small holes or irregularities of 3 mm or less. The synthetic resin emulsion base adjustment coating material is a base adjustment coating material called an organic filler with respect to the cement base adjustment coating material. This is because of the workability (long curing time due to the hydraulic reaction of cement), workability, and performance stability (eg, material storage, performance variations at low and high temperatures, Efro generation at low temperature, pot life, etc.) have been mainly developed and improved. Although these have the respective advantages as described above, they are unsuitable for base adjustment, and have a weak function as a sealer. Therefore, the underlayer adjusting material from these is used in combination depending on the situation of the underlayer. On the other hand, some of them have both the function as a sealer and the filling and repair of unevenness, pinholes, cracks, and the like of the base, so that the base can be adjusted independently. Since this is mainly composed of a synthetic resin emulsion, it does not cause volatilization of an organic solvent, and is suitable for recent environmental protection.
In addition, the coating base of the outer wall of the building usually expands and contracts due to warming and cooling, and may cause cracks and the like for a long time, so that even if there is such movement of the base, the initial effect can be continuously maintained. It is characterized in that a thermoplastic synthetic resin emulsion is used to impart elasticity that can follow the base. For this reason, even if the sealer and the base can be repaired independently by using a synthetic resin emulsion-based base adjustment coating material, it can be kept at a high temperature, a single-layer elastic coating material as a finish coating material, or a relatively thick coating. When a material to be applied is applied, the finish coating material may peel from the base adjustment coating material due to internal stress and cause swelling. These finish coating materials were applied after the adhesion was improved. As described above, in the case of the synthetic resin emulsion-based base adjustment coating material, even if both the sealer and the base can be repaired independently, a problem may occur depending on the type of the finish coating material, and the applicable range of the finish coating material is limited. It was something that could be done. Further, since a thermoplastic synthetic resin emulsion was used, there was a portion having poor water softening resistance, and as a result, it could not be used alone as a base adjustment coating material. On the other hand, the use of a cross-linked emulsion as a synthetic resin emulsion of a synthetic resin emulsion-based base adjustment coating material has been proposed to solve the above-mentioned swelling of the finish coating material and the problem of water softening resistance. . For example, the first to fourth pages of “Academic Lectures, 1993 Conference Papers Published by the Japan Society of Architects and Finishes” include, as title 401, “Development of aqueous reaction-curable emulsion resin-based filler” A synthetic resin emulsion-based base adjustment coating material (organic filler) using an emulsion is introduced. And used as the crosslinked emulsion,
The following description is for an aqueous reaction-curable emulsion. "3. Development of aqueous reaction-curing emulsion resin For the purpose of imparting toughness and microelasticity to the coating film formed,
We have developed an aqueous reaction-curable emulsion resin (an acrylic emulsion resin with cross-linkability between emulsion particles) as a binder. The aqueous reaction-curable emulsion resin is stably present in the paint in a state where the emulsion particles and the crosslinking agent are mixed. After coating, the fusion between the emulsion particles and the crosslinking reaction proceed simultaneously during the evaporation of water to form a tough coating film. The cross-linking reaction between emulsion particles occurs by a dehydration condensation reaction between a carbonyl group, which is a reactive group oriented on the surface of the emulsion particles, and a hydrazide group of a cross-linking agent. Therefore, when water evaporates to the point where the crosslinking reaction starts, the subsequent reactions proceed at an accelerated rate, and as a result,
The drying time is short. The balance between the toughness and elasticity of the coating film formed was adjusted by controlling the Tg (glass transition temperature) and the crosslink density of the resin. In addition, during the synthesis of the emulsion, the adhesion to the substrate was greatly improved by the introduction of a monomer having a functional group contributing to the adhesion and the synergistic effect of the crosslinking with the toughness of the coating film. When a crosslinked emulsion is used as described above, it is essential to control the glass transition temperature (hereinafter, abbreviated as Tg) and the crosslink density of the resin.

[0003]

However, in the synthetic resin emulsion-based base adjustment coating material using these crosslinked emulsions, some functional groups of the crosslinked emulsion react during storage for a long period of time. In addition, since such a synthetic resin emulsion-based base adjustment coating material is manufactured by stirring and mixing an inorganic powder and an emulsion at the time of its manufacture, the emulsion particles are given shear stress by the powder, and the emulsion particles are destroyed. Partially occur. In such a case, in order to control the toughness of the coating film, the initially set crosslinking density of the resin may fluctuate, and the desired coating film toughness and elasticity may not be obtained. Was. Furthermore, the synthetic resin emulsion base adjustment coating material using these cross-linked emulsions cannot increase the cross-link density much for the purpose of imparting elasticity,
As a result, since the degree of solvent resistance is not so high, it has been difficult to use a solvent-based finishing material. Furthermore, even in the case of an aqueous finishing coating material, there is a variation in the degree of adhesion, except for the case of using the same type of crosslinked emulsion as a synthetic resin emulsion-based base adjustment coating material, the adhesion is still insufficient. there were. Furthermore, if the exterior coating of the building exterior is newly constructed concrete, the peeling resistance of the synthetic resin emulsion-based foundation adjustment coating material itself will be poor unless a sealing process is performed, that is, a part of the elastic coating will be peeled off. Then, it was found that the peeled portion continuously spread. Therefore, the problem to be solved by the present invention is that it can be applied to a substrate independently (without performing a sealing process) irrespective of new construction or renovation, and has excellent adhesion, particularly excellent peeling resistance, and the conventional crosslinking. It is an object of the present invention to obtain an aqueous base preparation material having a wider range of compatibility of a finish coating material than a synthetic resin emulsion base preparation coating material using a shaped emulsion.

[0004]

On the other hand, the present inventors used a specific emulsion having a multilayer structure as a cross-linked emulsion, and determined the monomer composition of the resin in the core portion and the shell portion and the Tg of the resin. It has been found that a completely new synthetic resin emulsion-based base conditioner that solves the above-mentioned problems, that is, an aqueous base conditioner, can be produced by mixing a specific inorganic powder with this emulsion. That is, the present invention provides an aqueous base conditioner having the following configuration. 1. (A) a layer containing a copolymer having an epoxy group; and (B) a layer made of a copolymer inert to an epoxy group and a carboxyl group; and (C) a layer having a carboxyl group and an amide group. 3 layers of the copolymer layer, or 2 layers of the (A) layer and the (C) layer
(A) layer at the center, and (B)
Layer (C) on its surface, or (C) layer on the surface of (A) layer, and the glass transition temperature of the innermost layer
(Hereinafter abbreviated as Tg) equal to or less than the outermost layer.
Tg of the film to be obtained is −30 to 5 ° C.
Multilayer structure emma using the following (a) to (c) as mer
And the inorganic powder in a pigment volume concentration (hereinafter referred to as PVC).
Abbreviated. ) Is 40 to 70%. [Polymerizable monomer] The polymerizable monomer used to generate the epoxy group is
Glycidyl methacrylate (a),
The polymerizable monomer used to generate the group is (meth)
Select from acrylic acid, itaconic acid, maleic acid, fumaric acid
One or more selected ethylenically unsaturated carboxylic acids (b)
Is a polymerizable material used to generate an amide group.
The (meth) acrylamide (c), (a)
The contents of (b) and (c) are each a multilayer structure type emulsion.
(A): (b):
(C) = 0.5 to 7.5 wt%: 0.5 to 7.5 wt%
%: 0.5 to 5 wt%. 2. A method for finishing an outer wall of a building, comprising: applying the aqueous base adjusting material described in 1. above , performing a base adjustment on the outer wall of the building, and further laminating and applying a silicon-based aqueous resin-dispersed enamel. 3. On the outer wall of a building, a method of finishing an outer wall of a building, comprising applying the aqueous base conditioner described in 1., adjusting the base, and further applying a single-layer elastic finish coating material in a laminated manner. Multi-layer structure type emulsion for use in the present invention, an emulsion which is formed from two or three layers, epoxy functional groups on the innermost layer part, the outermost layer portion are present carboxyl functional group. These functional groups usually do not react at all, but when the water as the dispersion medium in the emulsion evaporates, the distance between the emulsion particles decreases, and further, when the emulsion particles come into contact with each other and fuse, a crosslinking reaction occurs. And rapidly form a water-insoluble synthetic resin coating. Such an emulsion may be prepared by a conventionally known method, but as an example, the manufacturing method and the specific structure are described in
-76004. When cited below, "The monomers used for producing various copolymers contained in the dispersed particles of the emulsion composition are roughly classified into the following three types. First, examples of the “monomer having an epoxy group” for producing a copolymer having an epoxy group include epoxy derivatives such as diglycidyl acrylate, glycidyl methacrylate, and allyl glycidyl ether. These may be used alone or in combination of two or more. Next, as a `` monomer having a functional group capable of reacting with an epoxy group '' for producing a copolymer having a functional group capable of reacting with an epoxy group, acrylic acid containing a carboxyl group,
Ethylenically unsaturated carboxylic acids such as methacrylic acid, crotonic acid, maleic acid or monoalkyl esters thereof, itaconic acid or monoalkyl esters thereof, fumaric acid or monoalkyl esters thereof;
Alkylamino esters of alkyl acrylic acid or methacrylic acid such as methylaminoethyl acrylate, N-methylaminoethyl methacrylate, dimethylaminoethyl acrylate, dimethylaminoethyl methacrylate; monovinylpyridines such as vinylpyridine; dimethylaminoethyl vinyl ether Vinyl ethers having an alkylamino group; unsaturated amides having an alkylamino group such as N- (2-dimethylaminoethyl) acrylamide and N- (2-dimethylaminoethyl) methacrylamide. These may be used alone or in combination of two or more. Furthermore, "other monomers", i.e., "copolymers inert to both epoxy groups and functional groups capable of reacting with epoxy groups", "copolymers having epoxy groups", and "reactive with epoxy groups" Monomers used to produce the “functionalized copolymer” include methyl-, ethyl-, isopropyl-, n-butyl-, isobutyl-, n-
-Amyl-, isoamyl-, n-hexyl-, 2-ethylhexyl, octyl-, decyl-, dodecyl-, octadecyl-, cyclohexyl-, phenyl-, benzyl-, 2-hydroxyethyl-, hydroxypropyl-acrylate or Acrylic or methacrylic esters such as methacrylate; vinyl esters such as vinyl acetate and vinyl propionate; acrylonitrile, methacrylonitrile and the like; styrene, 2-methylstyrene, vinyltoluene, t-butylstyrene, chlorostyrene, vinylanisole , Vinylnaphthalene, divinylbenzene, and other aromatic vinyls; acrylamide; methacrylamide, maleic amide, N-methylolacrylamide, N-methylolmethacrylamide, diacetoneacrylamide Vinylidene chloride; amides etc.
Vinylidene halides such as vinylidene fluoride; ethylene, propylene, isoprene, butadiene, vinylpyrrolidone, vinyl chloride, vinyl ether, vinyl ketone,
Examples include vinylamide and chloroprene. These may be used alone or in combination of two or more. Therefore,
Dispersed particles contained in the composition of the present invention are used as “epoxy group-containing monomers” and “other monomers” as raw material monomers to form “epoxy group-containing copolymers”, and two or more “others” Monomer) as a raw material to produce an `` epoxy group and a copolymer inert to any of the functional groups capable of reacting with the epoxy group '', and a `` monomer having a functional group capable of reacting with the epoxy group '' The “other monomer” is used as a raw material monomer to produce a “copolymer having a functional group capable of reacting with an epoxy group”, and a layer containing each of these copolymers is laminated to manufacture. And the like. However, as in the method cited here, a layer composed of “a copolymer inert to both the epoxy group and a functional group capable of reacting with the epoxy group” is not necessarily required, and a “copolymer having an epoxy group” is not necessarily required. It may have a two-layer structure comprising an innermost layer of the “coalescing” and an outermost layer of the “copolymer having a functional group capable of reacting with an epoxy group”. The content of each of the epoxy group and the carboxyl group in the innermost layer and the outermost layer varies in relation to the Tg of the copolymer in each layer, but the content of the polymerizable monomer copolymerized to introduce the epoxy group and the carboxyl group is changed. In terms of the content, each content is 0.5 to 7.5% by weight of all the monomers constituting the multilayer emulsion. The monomer used to introduce the epoxy group is
Glycidyl methacrylic acid
Use rates. Allyl glycidyl ether tends to be poor in copolymerizability with other acrylic monomers, and glycidyl acrylate has high hydrophilicity, so when a multilayer emulsion is formed by polymerization, epoxy groups are localized inside the innermost layer. It is difficult to form the emulsion, and particularly when the emulsion has a two-layer structure, it may react with the carboxyl group in the outermost layer. Therefore, glycidyl methacrylate which does not have such a problem is most preferable. Mosquito
The monomer used to introduce the ruboxyl group is
Of the descriptions in the cited references,
(Meta) because of the good stability of the crosslinking reaction
Select from acrylic acid, itaconic acid, maleic acid, fumaric acid
Uses one or more selected ethylenically unsaturated carboxylic acids
I do. In particular, in the case of a two-layer emulsion, by using a highly hydrophilic one, the carboxyl group is localized outside the outermost layer and does not react with the epoxy group in the innermost layer before the crosslinking reaction, so that the storage stability is maintained. It improves the performance. For these reasons, acrylic acid is more preferably used. multilayer
An amide group is present in the outermost layer of the structural emulsion.
You. Polymerizable monomers used to generate amide groups
Is a multi-layered emulsion described in the above cited document.
Polymerization stability of paint and paint stability of aqueous base conditioner
(Meth) acrylamide because of good
use. Tg of each layer of the copolymer innermost layer to equal to or less than the outermost layer. In the case of such a Tg range, the emulsion particles are not easily crushed even when shear stress is generated by mixing and stirring with the inorganic powder during the production of the aqueous base preparation material of the present invention. Furthermore, in aqueous base adjustment member of the present invention, adhesion, and <br/> for followability to the coating base, Tg of the films formed from the emulsion to -30~5 ℃. The average particle size of the multilayer emulsion affects the solid content of the resin of the emulsion and the pigment volume concentration of the produced aqueous base preparation material. As a guideline, an average particle size of about 0.05 to 0.2 μm can be used. As the inorganic powder, heavy calcium carbonate, precipitated calcium carbonate, kaolin, bentonite, sericite, dolomite, talc, clay, aluminum oxide, magnesium oxide, diatomaceous earth, and the like can be used, and especially as the outermost layer of a multilayer emulsion. Perform a metal cross-linking reaction with a certain carboxyl group, an inorganic powder that produces divalent or higher metal ions, such as aluminum hydroxide, gypsum,
When Portland cement and alumina cement are used together to such an extent that the stability of the paint is not impaired, the physical properties of the aqueous microelastic filler are further improved by metal crosslinking. When such a combination is used, it is necessary to make the content of the carboxyl group in the outermost layer of the multilayer emulsion larger than the content of the epoxy group in the innermost layer. The average particle diameter of the inorganic powder is about 0.1 to 40μ,
0.25-10 μm is more preferred. By combining such an inorganic powder with the above-mentioned multilayer emulsion, excellent adhesion to the coating base as a synthetic resin emulsion base adjustment material, realization of followability and fine elasticity capable of hard top coating, top coating Adhesion to the substrate. Coating materials that can be used as the topcoat are elastic and hard coating materials from aqueous to weak solvent systems. In particular, when a single-layer elastic coating material or a silicon-based aqueous resin-dispersed enamel is used, an excellent function can be imparted to the outer wall of the building in combination with the function of the overcoat. The mixing ratio of the constituent components of the present invention may be determined by appropriately mixing the multilayer emulsion and the inorganic powder so that the pigment volume concentration (hereinafter abbreviated as PVC) of the produced microelastic filler is 40 to 70%. . PVC is 40
%, The peeling resistance is inferior, and when it is higher than 70%, the hair crack following property is inferior. In the present invention, a dispersant, a film-forming aid, a thickener, an antifoaming agent and the like can be further blended for improving the physical properties. Examples of the dispersant include polycarboxylic acid type, sodium hexametaphosphate, β-naphthalenesulfonic acid, and sodium salt of formalin condensate. Examples of the film-forming aid include texanol, ethylene glycol monobutyl ether, and ethylene glycol monobutyl ether. Acetate, diethylene glycol butyl ether, propylene glycol butyl ether, dipropylene glycol butyl ether, hexylene glycol, benzyl alcohol, etc., as a thickener, inorganic substances such as silicate, montmorillonite, organic montmorillonite, colloidal alumina, carboxymethyl cellulose , Cellulose derivatives such as methyl cellulose, hydroxyethyl cellulose, ethyl hydroxyethyl cellulose, sodium polyacrylate, Polyacrylic acid-based ones such as a luic acid (meth) acrylate copolymer, and polyether-based ones such as Pluronic polyethers, polyether dialkyl esters, polyether dialkyl ethers, modified polyether urethanes, and modified polyether epoxy Examples of the defoaming agent include silicone-based, silica-based, and mineral oil-based ones. The mixing ratio of the dispersant is 0 to 10 based on 100 parts by weight of the solid content of the multilayer emulsion.
Parts by weight, 0 to 40 parts by weight of a film-forming aid, 0 to 50 parts of a thickener
Parts by weight and the defoamer are in the range of 0 to 10 parts by weight. Also P
An inorganic type such as titanium dioxide, zinc oxide, carbon black, red iron oxide, yellow iron oxide, titanium yellow, chrome green, cobalt green, ultramarine blue, cobalt blue, etc., β-naphthol type, and naphthol AS, which do not exceed the specified range of VC. Azo pigments, pyrazolone-based, benzimidazolone-based insoluble azo pigments, soluble azo pigments, anthraquinone-based, thioindigo-based, perylene-based, quinacridone-based, monoazo-based, condensed azo-based, phthalocyanine-based, isoindolinone-based, quinophthalone-based, etc. Organic coloring pigments can also be blended. The application of the aqueous base preparation material of the present invention is performed by a spray gun such as a tile gun or a ricin gun, a spraying device such as an airless gun, a roller such as a mastic roller or a wool roller, a trowel coating, a brush coating or the like.

[0005]

EXAMPLES Reference Example 1 Emulsion polymerization of a multilayer emulsion was carried out according to the monomer composition ratio of the innermost layer and the outermost layer as shown in Tables 1 and 2. The procedure of emulsion polymerization is shown below. First, 350 g of deionized water and 1 g of sodium alkylbenzenesulfonate were charged into a reaction vessel, and the temperature was raised to 70 ° C. while stirring and replacing with nitrogen, and 2 g of ammonium persulfate was added. In addition, styrene 105.
25 g, n-butyl acrylate 270.7 g, glycidyl methacrylate 12.5 g, deionized water 100 g
Was added to a solution prepared by dissolving 0.6 g of sodium alkylbenzenesulfonate, and the emulsified monomer emulsified and dispersed was dropped continuously over 3 hours. After completion of dropping, aging was performed for 2 hours. Then styrene 26.3 g, n-butyl acrylate 67.7 g, methacrylic acid 7.55 g, acrylamide
Then, 10 g of t-dodecyl mercaptan and 0.4 g of t-dodecyl mercaptan were added to a solution of 0.4 g of sodium alkylbenzenesulfonate in 50 g of deionized water, and the emulsified monomer emulsified and dispersed was dropped continuously over 2 hours. After completion of dropping, aging was performed for 2 hours. Aqueous ammonia was added to the obtained emulsion to adjust the pH to 7.5, and then filtered through a 200-mesh wire net to obtain a milky white emulsion.

[Table 1]

[Table 2] (Reference Examples 2 to 15 ) According to the monomer composition ratio of the innermost layer and the outermost layer shown in Tables 1 and 2, emulsion polymerization of a multilayer emulsion was performed in the same manner as in Reference Example 1.
In No. 13, although the amount of acrylamide was too large, the viscosity was increased in the course of the polymerization. However, in the other cases, stable polymerization could be performed, and a milky white emulsion could be produced. * Preliminary Test * Using the emulsions of Reference Examples 1 to 15 except Reference Example 13 , the following formulation was used to produce a synthetic resin emulsion-based base conditioner, and these were designated as Preparation Examples 1 to 15 , respectively. At this time, the PVC of the synthetic resin emulsion-based base conditioner produced was 60%. (Paint Stability Test) For each of the thus prepared synthetic resin emulsion-based base conditioners, a change in viscosity when left for one week in a 50 ° C. atmosphere was evaluated as a paint stability test by an appearance change. When the gelation or the aggregation of the emulsion occurred, x was given, and when no change was observed, x was given. Results As shown in Table 3 and Table 4, formulation
Due to the phase separation of the reactive group in Example 9 is not made, the emulsion aggregation reaction of an epoxy group and a carboxyl group is in progress, Formulation Example 12, acrylamide
Due to the protective effect of the emulsion due to de could not be obtained, it was found that the emulsion aggregation.
In addition, it was found that the other compositions exhibited good paint stability. (Overcoat Compatibility) Further, as an overcoat compatibility test, adhesion tests with various overcoat materials were performed. First, the prepared synthetic resin emulsion-based primer was applied on a 15 × 7 cm slate plate at a coating amount of 1.5 kg / m ² , and after curing for 24 hours, the surface was coated with a topcoat material 1 and a topcoat material. 2. The top coat material 3 was applied at the application amount shown below and dried for 2 weeks.
8.19 In accordance with the water resistance test in the General Test Methods for Paints, add deionized water to a container to a depth of about 150 mm, hang the prepared specimen with clips and strings, immerse the specimen to a depth of about 120 mm, and after one week, Was taken out, drained, and the coating film was immediately observed visually to evaluate the results. At this time, 1 was marked for significant swelling and 5 was marked for no change.
The others were evaluated on a 5-point scale according to the range of swelling. The results are shown in Tables 3 and 4. As can be seen from the results, Formulation Example 10 using the emulsion of Reference Example 10 , which does not contain glycidyl methacrylate, was found to be peeled off in the single-layered elastic coating material, and was found to be extremely poor in silicone-based aqueous resin-dispersed enamel. The top coat compatibility is insufficient because of blistering. In addition, the emulsion, the synthetic resin emulsion-based base conditioner of Formulation Example 11 manufactured from Reference Example 11 used in a larger amount than the content of glycidyl methacrylate defined when the monomer type suitably used in the present invention was manufactured, The topcoat compatibility is insufficient because the single-layer elastic coating material has peeled off and the silicon-based aqueous resin-dispersed enamel has only partially swollen. Furthermore, Formulation Example 14 using the emulsion of Reference Example 14 having a Tg lower than the range specified in the present invention also showed that peeling occurred in the single-layer elastic coating material.
The top coat compatibility is insufficient because the silicone-based aqueous resin-dispersed enamel slightly swells. Other than these, various types of overcoats also exhibited excellent adhesion and were found to have excellent overcoat compatibility. The top coating material 1 is “Elastic Topless Style” (single-layer elastic coating material, applied amount 1 kg / m ² ) manufactured by SK Kaken Co., Ltd., and the top coating material 2 is “SK Mild Urethane” (weak) manufactured by SK Kaken Co., Ltd. Solvent-based coating material, coating amount 0.3 kg / m ² ), and silicon-based aqueous resin-dispersed enamel manufactured by the following manufacturing procedure was used as the top coating material 3. (Application amount 0.3k
g / m ² ) Topcoat material 3 65 parts by weight of cyclohexyl methacrylate, 10 parts by weight of γ-methacryloxypropyltrimethoxysilane, 2-
23 parts by weight of ethylhexyl acrylate, acrylic acid 2
Parts by weight, Eleminor JS-2 [manufactured by Sanyo Chemical Co., Ltd.
Reactive emulsifier] 10 parts by weight, t-butylperoxy (2
-Ethylhexanoate) 0.5 parts by weight, 54 parts by weight of water and 6 parts by weight of methanol were stirred and emulsified, and then a dispersion containing a monomer having a particle size of 0.5 μm was prepared using ultrasonic waves. . Next, 63 parts by weight of water and 7 parts of methanol were charged into a reaction vessel equipped with a stirrer, a reflux condenser, a dropping funnel, a nitrogen inlet, and a thermometer, and the temperature was raised to 80 ° C. with stirring. The dispersion containing the monomer was dropped into the above reaction vessel over 4 hours to carry out a reaction. During the addition, 80 is introduced while introducing nitrogen.
The reaction was carried out at 25 ° C., and a 25% aqueous solution of ethylamine was added as needed to keep the pH at 6 to 8. After dropping, aging was performed for 2 hours, and the mixture was cooled to room temperature to obtain an aqueous resin dispersion. 22 parts by weight of rutile titanium dioxide, 2.5 parts by weight of a dispersant, 6 parts by weight of a film-forming aid, 1 part by weight of a thickener, and 0.2 parts by weight of a defoamer were added to 60 parts by weight of the aqueous resin dispersion. By mixing by weight, a white silicone-based aqueous resin-dispersed enamel was produced.

[Table 3]

[Table 4] (Example 1) In 30.00 parts by weight of the emulsion of Reference Example 2, 5.00 parts by weight of titanium dioxide, 23.79 parts by weight of heavy calcium carbonate, and a polycarboxylic acid type dispersion as a dispersant 0.50 parts by weight of an agent, 3.00 parts by weight of benzyl alcohol as a film-forming aid, 3.76 parts by weight of a 2% solution of carboxymethylcellulose as a thickening agent, and 0 of a silicone-based antifoaming agent as a defoaming agent. .20 parts appropriately mixed to P
A 40% VC synthetic resin emulsion-based base adjustment material was produced. The following physical property tests were performed on the synthetic resin emulsion base preparation. As a result, as shown in Table 5, it showed excellent performance in all of peeling resistance, crack resistance, zero span elongation, and hair crack following property, and it was found that the material was an excellent aqueous base material. * Synthetic resin emulsion-based base conditioner physical property test * (peeling resistance) The prepared synthetic resin emulsion-based base conditioner was applied to a 15 × 7 cm slate plate in an amount of 1.
After applying at 5 kg / m ^{2 and} curing for 2 weeks, a peeling test was conducted in which the end was peeled off with a nail. At this time, the case where the film was not peeled at all was set to 5, and the case where the film was completely peeled was set to 1, and a 5-level evaluation was performed. (Crack resistance) JIS A 6915 Thick finish coating material 5.7 According to the crack resistance test by initial drying, apply the prepared synthetic resin emulsion base adjustment material on the surface of a 15 × 30 slate plate 1 Immediately apply the test specimen applied at 0.5 kg / m ² to wind speed 3
The test specimen is placed in a wind tunnel with m / s ± 10% and placed parallel to the airflow. After 6 hours, the test specimen was taken out, and it was visually observed whether or not cracks occurred on the surface of the synthetic resin emulsion-based base adjustment material, and was evaluated as ○ when there was no crack at all, and as X when there was a crack on the entire surface. Was done. (Zero span elongation and hair crack following) 50 × 100mm thick adhesive tape 50 ×
Two 50 × 5 mm slate plates are stuck together so as not to have a gap therebetween, and the produced synthetic resin emulsion-based base adjustment material is applied at a coating amount of 1.5 kg / m ^{2 with a} uniform thickness, and the temperature is maintained for 14 days. After curing at 20 ° C and 60% humidity, peel off the adhesive tape, fix both ends in the longitudinal direction, and pull at a speed of 5 mm per minute, and measure the pulling distance of the synthetic resin emulsion base adjustment material at the time of breaking. Value. If the measured value is 0.5 mm or more, it is assumed that the hair crack of the skeleton can be traced, and ○ is set to 0.
A sample less than 5 mm was rated as unacceptable, and was evaluated as x.

[Table 5] (Examples 2 to 5 ) The types of the dispersant, the film-forming aid, the thickener, and the defoamer were the same as in Example 1 except that the mixing ratios shown in Table 5 were used. A base adjustment material was manufactured. The same test as in Example 1 was conducted on these synthetic resin emulsion base adjustment materials. As shown in Table 5, the results were as follows: peeling resistance, crack resistance,
It exhibited excellent performance in both zero-span elongation and hair crack following properties, and was found to be an excellent aqueous base conditioner. (Comparative Example 1) As shown in Table 5, the same procedure as in Example 5 was carried out except that the emulsion of Reference Example 15 was used as the multilayer structure emulsion.
In the same manner as in the above, a synthetic resin emulsion base adjustment material was manufactured, and the same test was conducted. As shown in Table 5, the film Tg of the multi-layered emulsion was higher than the range specified in the present invention, so that the value of the zero-span elongation was small and it was not possible to follow the hair crack of the skeleton. (Comparative Example 2) Synthetic resin emulsion base adjustment materials were produced at the compounding ratios as shown in Table 5, and tests were conducted in the same manner as in the examples. As shown in Table 5, as shown in Table 5, the peeling resistance was poor because PVC was lower than the specified range of the present invention, and when used alone in a new concrete building or the like, there is a possibility that swelling and peeling may occur over time. (Comparative Example 3) Synthetic resin emulsion base adjustment materials were produced at the compounding ratios shown in Table 5, and tests were performed in the same manner as in the examples. As shown in Table 5, as shown in Table 5, PVC was inferior in crack resistance because it was higher than the specified range of the present invention, and further, the value of zero span elongation was small, and it was found that it could not follow the hair crack of the skeleton.

[0006]

As is clear from the above examples, the aqueous base conditioner of the present invention comprises a specific multilayer structure emulsion of a cross-linking reaction type and a specific inorganic powder, so that it can be used on the outer wall of a building. It has excellent adhesion and follow-up properties to various types of bases.Furthermore, it is possible to use all types of coating materials, from hard and soft weak solvent systems to water-based coatings, and has excellent adhesion to these top coatings. In conventional substrate adjustment, both the sealer and the substrate adjustment material (filler) had to be used together, but the sealer effect and the substrate adjustment effect (smoothness of unevenness and This is very beneficial because it also serves as both the filling of pinholes, etc.

──────────────────────────────────────────────────の Continuation of the front page (51) Int.Cl. ⁷ identification code FI E04F 13/02 E04F 13/02 C (58) Field surveyed (Int.Cl. ⁷ , DB name) C09D 5/00 C08G 59 / 40-59/60 C09D 151/00-151/10 C09D 163/00-161/10

Claims (3)

(57) [Claims] (A) a layer containing a copolymer having an epoxy group; (B) a layer comprising a copolymer inert to an epoxy group and a carboxyl group; and (C) a carboxyl group and an amide. Three layers composed of a copolymer having a group, or two layers composed of an (A) layer and a (C) layer,
The (A) layer is the central part, the (B) layer is laminated on the surface, and the (C) layer is laminated on the surface, or the (C) layer is laminated on the surface of the (A) layer. Temperature (hereinafter Tg
Abbreviated. ) Is less than or equal to the outermost layer
Has a Tg of −30 to 5 ° C., and as a polymerizable monomer,
A multi-layer emulsion using the above (a) to (c),
An aqueous base conditioner obtained by mixing inorganic powder so that the pigment volume concentration (hereinafter abbreviated as PVC) is 40 to 70%. [Polymerizable monomer] The polymerizable monomer used to generate the epoxy group is
Glycidyl methacrylate (a),
The polymerizable monomer used to generate the group is (meth)
Select from acrylic acid, itaconic acid, maleic acid, fumaric acid
One or more selected ethylenically unsaturated carboxylic acids (b)
Is a polymerizable material used to generate an amide group.
The (meth) acrylamide (c), (a)
The contents of (b) and (c) are each a multilayer structure type emulsion.
(A): (b):
(C) = 0.5 to 7.5 wt%: 0.5 to 7.5 wt%
%: 0.5 to 5 wt%. 2. A method for finishing an outer wall of a building, comprising applying the aqueous base adjusting material according to claim 1 on the outer wall of the building, adjusting the base, and further applying a layer of a silicon-based aqueous resin-dispersed enamel. . 3. A method for finishing an exterior wall of a building, the method comprising applying the aqueous base adjustment material according to claim 1 on the exterior wall of the building, adjusting the foundation, and further applying a single-layer elastic finish coating material in a laminated manner.