JP5827844B2 - Exterior construction method - Google Patents

Description

  The present invention relates to an exterior construction method.

Conventionally, when tiles are laid on a concrete wall, if the concrete ground is not flat due to level differences, misplacement, or stagnation of the formwork, repair it entirely or partially with cement mortar for unevenness adjustment. On top of that, the method of tiling with tiled cement mortar has been widely used.
However, the construction method using cement mortar has a problem that it takes time for construction because it requires roughening of the groundwork (ultra-high pressure water washing, cup sandering, etc.) during construction, and noise is also generated.
Also, in the construction method using cement mortar, there are many variations in construction quality, and there is a risk of dryout (hardening failure) in the thinned and frayed parts of cement mortar, so it takes time to install tiles and manage their construction. I need it.
Further, the distortion due to the differential movement of the constituent material may repeatedly cause the peeling and peeling of the tile by repeatedly acting on the adhesive interface between the tile and the base over time.

  Then, in order to improve said point in the construction method using cement mortar, the organic adhesive for tiles is proposed, and the said adhesive is JIS-ized (refer nonpatent literature 1). Since this adhesive has elasticity, it is excellent in strain followability, and has the advantage that tile peeling and peeling due to the differential movement hardly occur, and stable construction quality can be obtained.

  On the other hand, when tiled using an organic adhesive for tiles, the adhesive is usually applied to the ground using a comb eyelid, so that there is a problem that it can be applied only to the unevenness of the ground surface. is there. That is, if there is unevenness on the ground surface made of concrete or the like due to a level difference in the formwork, misplacement, stagnation, etc., applying adhesive directly to the ground surface will also cause unevenness on the tile finished surface, Come the problem. Further, when the adhesive is thickened and tiled to absorb unevenness, the adhesive sags due to the weight of the adhesive and the tile until the adhesive is cured. In addition, organic adhesives for tile use have a high viscosity as a base material for absorbing unevenness, so that the workability is poor and it is difficult to produce a smooth surface due to flaws. It is inferior to workability such as.

For this reason, even when tiled with an organic adhesive for tiles, if there is unevenness on the ground surface, roughening of the ground surface (ultra-high pressure water) is required prior to application of the adhesive. After washing, cup sanding, etc.), it is necessary to apply cement mortar to smooth the ground surface. However, in the method using cement mortar, there is a concern that the tiles may peel off or peel off over time due to the reasons described above.
In particular, it may be repaired by partially applying cement mortar to the uneven surface formed on the ground surface. In this case, the cement mortar is inevitably thinned, resulting in problems such as dryout. There is no denying the risk of peeling or peeling off tiles. In order to avoid this danger, there is a problem that it takes time and effort in the base curing and the like when trying to perform a more appropriate construction method without fear of tile peeling.

  With respect to the curable composition applied to an adhesive applied for civil engineering, construction, industrial use, etc., for example, in Patent Document 1, a curable composition using a reactive silicon group-containing polyoxyalkylene polymer. Is disclosed, and the curable composition can suppress a decrease in adhesion to rainwater and underground moisture.

Japanese Patent No. 4198945

JIS A 5557, 2006 edition, “Organic Adhesive for Tiling”

  The present invention has been made in view of the above-described circumstances, and can be applied to a base material having unevenness with an exterior material having excellent adhesion and followability, and can be easily constructed. It is an issue to provide.

As a result of intensive studies, the present inventors have found that the above problems can be solved by a construction method using a specific composition for preparing unevenness, and have completed the present invention.
Means for solving the above-described problems are as follows.

<1> A viscosity A measured at a rotation speed of 1 r / min under a temperature condition of 23 ° C. in accordance with JIS K68333-1 using a B-type viscometer on at least a part of the surface of the base material is 1000 Pa · s. The viscosity ratio (A / B) between the viscosity A and the viscosity B measured at a rotation speed of 10 r / min is 6 or more, and a cured product obtained by curing is shown. dumbbell physical properties were measured according to JIS A5557 is, the maximum tensile strength is ^{0.4N / mm 2 ~2.0N / mm 2} , for uneven surface adjustment elongation at break is 40% to 200% Step X of applying the composition to form an uneven surface adjustment layer,
An exterior construction method including a step Y of attaching an exterior material to the base material on which the unevenness adjusting layer is formed by using a reactive curable adhesive.
<2> The exterior construction method according to <1>, wherein the base material is a cement-based cured body.

<3> uneven surface conditioning composition for use before climate as X The curable resin having a hydrolyzable silyl group represented by the following general formula (1) (A), epoxy compound (B), non-reactive Liquid composition (C) and an inorganic filler (D) containing a surface-treated inorganic filler (d1) having a particle diameter of 20 to 60 nm , and the curable resin (A) and <1> or <1> containing 70 to 150 parts by mass of the non-reactive liquid component (C) and 150 to 400 parts by mass of an inorganic filler (D) with respect to a total of 100 parts by mass of the epoxy compound (B). 2> exterior construction method.
-SiR ¹ _n (X) _3-n (1)
(In General Formula (1), X represents a hydrolyzable group, R ¹ represents an alkyl group having 1 to 20 carbon atoms, and n represents 0, 1 or 2.)

<4> The exterior construction method according to <3>, wherein the non-reactive liquid component (C) includes at least one selected from a plasticizer (c1) and a diluent (c2).
<5> The exterior construction method according to <3> or <4 >, wherein the inorganic filler (D) further includes a non-surface-treated inorganic filler (d2) having a particle diameter of 150 μm to 350 μm.
<6> The inorganic filler (D) further includes a non-surface-treated inorganic filler (d3) having a particle diameter of 30 μm to 100 μm, and any one of <3> to <5> Exterior construction method.

Uneven surface conditioning composition for use in X as <7> before climate further, at least one component selected from calcium oxide and calcium hydroxide (E), the curable resin (A) and the epoxy compound The exterior construction method according to any one of <3> to <6>, which is contained in an amount of 1 to 100 parts by mass with respect to a total of 100 parts by mass of (B).
<8> prior to reaction curing type adhesive used Y as climate is exterior method according to any one of <7> to a one-part moisture-curable modified silicone resin-based adhesive <1>.

  ADVANTAGE OF THE INVENTION According to this invention, the exterior construction method which can stretch | stretch an exterior material with the outstanding adhesiveness and followable | trackability with respect to the foundation | substrate which has unevenness, and was excellent in workability can be provided.

It is a schematic sectional drawing which shows an example of embodiment of the exterior construction method of this invention. It is a schematic sectional drawing which shows an example of other embodiment of the exterior construction method of this invention.

Hereinafter, the present invention will be described in detail.
The exterior construction method of the present invention (hereinafter referred to as “the construction method of the present invention” as appropriate) uses a B-type viscometer on the surface of a base material having a non-land surface, and a temperature of 23 ° C. in accordance with JIS K6833-1. Under the conditions, the viscosity A measured at a rotation speed of 1 r / min is in the range of 1000 Pa · s to 3000 Pa · s, and the viscosity ratio between the viscosity A and the viscosity B measured at a rotation speed of 10 r / min (A / B) is a but 6 or more and dumbbell physical properties were measured in accordance with JIS A5557 indicated cured product obtained by curing, the maximum tensile strength be 0.4N ^/ mm ² ~2.0N ^/ mm 2 Then, a non-land adjustment composition having an elongation at break of 40% to 200% (hereinafter sometimes simply referred to as “non-land adjustment composition”) is applied to form a non-land adjustment layer. Process X,
And a step Y of attaching an exterior material to the base material on which the unevenness adjusting layer is formed by using a reactive curable adhesive.

  The exterior construction method of the present invention having the above-described steps makes it possible to stretch the exterior material with excellent adhesion and followability to the surface of the base material having unevenness, and is excellent in workability.

  Hereinafter, the exterior construction method of the present invention and the composition for adjusting unevenness used therein will be described in detail.

In this specification, the term “process” is not limited to an independent process, and is included in this term if the intended action of this process is achieved even when it cannot be clearly distinguished from other processes. .
Moreover, the numerical value range shown using "to" in this specification shows the range which includes the numerical value described before and behind "to" as a minimum value and a maximum value, respectively.
In the present specification, the total solid content of the composition refers to a total measurement of components excluding the diluent (c2) from the entire composition.
In addition, in this specification, when referring to the amount of each component in the composition, when there are a plurality of substances corresponding to each component in the composition, the present in the composition unless otherwise specified. It means the total amount of multiple substances.

  The construction method of the present invention includes at least a process X and a process Y described in detail below, and may further include other processes.

[Process X]
In the process X, the unevenness adjusting layer is formed by applying the unevenness adjusting composition to at least part of the surface of the base material.

In the construction method of the present invention, it is not necessary to perform a special pretreatment such as cleaning with ultrahigh pressure water on the surface of the base material before performing the step X.
In other words, in the conventional exterior method using mortar, as a treatment prior to unevenness adjustment and pasting of exterior materials such as tiles, a roughening treatment (roughness for improving adhesion) to the surface of the base material is performed. For example, it was necessary to perform ultra-high pressure water washing, cup sanding, and the like. On the other hand, in the construction method of the present invention using the composition for adjusting unevenness, it is not necessary to perform a surface roughening treatment such as ultra-high pressure water washing before performing Step X. The construction can be simplified.

(Non-land adjustment layer)
The unevenness adjusting layer formed in the process X is formed by applying the unevenness adjusting composition on at least a part of the surface of the base material. As a formation aspect of the unevenness adjustment layer in the present invention, it is sufficient that it is formed so as to fill at least the uneven part, and the composition for adjusting unevenness is applied so as to fill the uneven part in a part of the surface of the base material. Then, an aspect of forming a non-land adjustment layer on a part of the surface of the base material, and a non-land adjustment layer is applied to the entire surface of the base material by applying the composition for adjusting the non-land so as to cover the entire surface of the base material Both aspects of forming the are included.

  The application method of the composition for adjusting the unevenness in the process X is not particularly limited, and an application method commonly used in this technical field, such as application using an applicator such as a bag, can be applied.

(Base material)
Although it will not specifically limit if it is a base material which can apply the construction method of this invention as a base material, A cement-type hardened body is preferable.
Examples of the cement-based hardened body that can be used as the base material in the present invention include concrete such as extruded cement board, reinforced concrete (RC), precast concrete (PC), lightweight cellular concrete (Autoclaved Lightweight Concrete).

(Roughness adjustment composition)
The composition for adjusting the unevenness used in the process X has a viscosity A measured at a rotational speed of 1 r / min under a temperature condition of 23 ° C. in accordance with JIS K68333-1 using a B-type viscometer of 1000 Pa · s to 3000 Pa · s, the viscosity ratio (A / B) between the viscosity A and the viscosity B measured at a rotational speed of 10 r / min is 6 or more, and a cured product obtained by curing is obtained. dumbbell physical properties were measured in accordance with JIS A5557 indicated, the maximum tensile strength is ^{0.4N / mm 2 ~2.0N / mm 2} , uneven surface adjustment elongation at break is 40% to 200% Composition.

  The composition for adjusting unevenness is excellent in adhesion to both the base material and the reactive curable adhesive used in the process Y, and forms an unevenness adjusting layer having excellent elasticity that contributes to the distortion followability of the base material. It is a composition excellent in workability that can be applied easily when forming the unevenness adjusting layer.

  Furthermore, for example, in the case where an exterior material such as a tile is stretched on the outer wall using the construction method of the present invention, when adjusting the unevenness by forming the unevenness adjusting layer using the unevenness adjusting composition, the unevenness is adjusted. By applying the adjustment composition to the entire outer wall, the overlaid part, cold joint part, joint joint, etc. generated during the construction of the outer wall body, it is possible to improve the waterproof function and workability of the outer wall as well as the unevenness adjustment. it can.

  In addition, the composition for adjusting unevenness according to the present invention is such that when the uneven part is partially repaired, since the occurrence of dryout or the like is suppressed even if it is thinned, such as when applying mortar. Compared to conventional unevenness adjustment, safety against tile peeling and peeling is increased.

<Viscosity, viscosity ratio>
The viscosity and the viscosity ratio of the composition for adjusting the unevenness are 23 ° C. in accordance with JIS K6833-1 (2008 version) using a B-type viscometer from the viewpoint of workability in forming the uneven adjustment layer. The viscosity A measured at a rotational speed of 1 r / min under temperature conditions is in the range of 1000 Pa · s to 3000 Pa · s, and the viscosity ratio between the viscosity A and the viscosity B measured at a rotational speed of 10 r / min (A / B ) Must be 6 or more.

When the viscosity A of the composition for adjusting unevenness is less than 1000 Pa · s, dripping is likely to occur in the case of construction on a vertical surface, and it becomes difficult to form the uneven adjustment layer with a uniform layer thickness. On the other hand, when the viscosity A is larger than 3000 Pa · s, the resistance when applying the unevenness adjusting composition to the surface of the base material using a trowel or the like increases, and the workability deteriorates.
The viscosity A of the composition for adjusting unevenness is preferably 1000 Pa · s to 2500 Pa · s, and more preferably 1000 Pa · s to 2000 Pa · s.

If the viscosity ratio (A / B) in the composition for adjusting the unevenness is smaller than 6, the workability when spreading the composition for adjusting the unevenness with a scissors deteriorates, and it is inconvenient when applied to a vertical surface. Dripping tends to occur in the composition for land adjustment.
The viscosity ratio (A / B) in the composition for adjusting the unevenness is preferably 6.3 or more, more preferably 6.5 or more.

  Viscosity A and viscosity B in the present invention were measured using a B-type viscometer (manufactured by Tokyo Keiki Co., Ltd.) in accordance with JIS K6833-1 (2008 edition) 5.4.1a) Method 1. It is.

<Dumbell physical properties>
Dumbbell physical properties were measured in accordance with JIS A5557 cured product obtained by curing the uneven surface conditioning composition exhibits a maximum tensile strength is ^{0.4N / mm 2 ~2.0N / mm 2} , The elongation at break is 40-200%.

If the maximum tensile strength of the cured product obtained by curing the composition for adjusting the unevenness is less than 0.4 N / mm ² , the cured product has a weak cohesive force and is not flat when distortion due to external force occurs. The adjustment layer is easily broken. On the other hand, if it is larger than 2.0 N / mm ² , the cured product becomes too hard, so that the exterior material is easily cracked due to distortion of the base.
Ultimate Tensile Strength cured product exhibits is preferably ^{0.4N / mm 2 ~2.0N / mm 2} , more preferably from ^{0.4N / mm 2 ~1.5N / mm 2} , particularly preferably it is ^{0.4N / mm 2 ~1.3N / mm 2} .

When the elongation at break indicated by the cured product obtained by curing the composition for adjusting the unevenness is less than 40%, it is not possible to follow the distortion caused by the differential movement, and the exterior material is easily peeled off and peeled off. On the other hand, if it exceeds 200%, the uneven adjustment layer is stretched when a heavy weight exterior material or the like is attached, and this is not preferable because it lacks dimensional stability. Furthermore, in the case where the reaction-curing adhesive is spread using a comb eyelet or the like in the process Y, if the unevenness adjusting layer is too soft, the workability at the comb eyelashes is deteriorated, and the unevenness is prevented. Since it is picked up and an exterior material cannot be applied smoothly, it is not preferable.
The elongation at break of the cured product is preferably 40% to 200%, more preferably 40 to 150%, and particularly preferably 40 to 130%.

  The viscosity A and viscosity ratio (A / B) of the unevenness adjusting composition used in the construction method of the present invention, and the physical properties (dumbbell physical properties) of the cured product obtained by curing the unevenness adjusting composition are as follows: From the viewpoint of alleviating distortion between the base material and the exterior material, preventing floating and cracking of the exterior material over a long period of time, and improving workability during construction in order to improve the construction quality, It is a characteristic. Such characteristics of the composition for adjusting the unevenness can be adjusted by adjusting the type and content of each component contained in the composition for adjusting the unevenness. For example, in the case of the composition described later as a preferred embodiment of the composition for adjusting unevenness, a curable resin (A), an epoxy compound (B), a non-reactive liquid component (C), an inorganic filler ( It can adjust with the content ratio of the kind of D), curable resin (A) and an epoxy compound (B), a non-reactive liquid component (C), and an inorganic type filler (D).

The composition for unevenness adjustment that has the viscosity A and the viscosity ratio (A / B) and the dumbbell physical properties of the obtained cured product are in the above range is represented by the following general formula (1). A curable resin having a hydrolyzable silyl group (A), an epoxy compound (B), a non-reactive liquid component (C), and an inorganic filler (D), and the curable resin ( 70 parts by weight to 150 parts by weight of the non-reactive liquid component (C) and 150 parts by weight to 400 parts by weight of the inorganic filler (D) with respect to 100 parts by weight of the total of A) and the epoxy compound (B). composition der containing is, the inorganic filler as a preferred embodiment (D) preferably contains an inorganic filler having a particle size which is surface treatment of 20 nm to 60 nm (d1).
-SiR ¹ _n (X) _3-n (1)
(In general formula (1), X represents a hydrolyzable group, R ¹ represents an alkyl group having 1 to 20 carbon atoms, and n represents 0, 1 or 2.)

The composition A for unevenness adjustment includes a curable resin (A), an epoxy compound (B), a non-reactive liquid component (C), and a surface-treated inorganic filler (d1 ) having a particle diameter of 20 nm to 60 nm. In addition to the inorganic filler (D) containing ), other components may be further contained as necessary.
Hereinafter, the essential and arbitrary components contained in the composition A for unevenness adjustment will be described in detail.

[Curable resin (A)]
The composition for unevenness adjustment contains the curable resin (A) having a hydrolyzable silyl group represented by the following general formula (1).
-SiR ¹ _n (X) _3-n (1)
(In General Formula (1), X represents a hydrolyzable group, R ¹ represents an alkyl group having 1 to 20 carbon atoms, and n represents 0, 1 or 2.)

  In the general formula (1), the hydrolyzable group represented by X is not particularly limited as long as it is a conventionally known hydrolyzable group. Examples of hydrolyzable groups include halogen groups, alkoxy groups, acyloxy groups, ketoximate groups, amino groups, amide groups, acid amide groups, aminooxy groups, mercapto groups, alkenyloxy groups and the like. Among these hydrolyzable groups, alkoxy groups such as a methoxy group, an ethoxy group, a propoxy group, and an isopropoxy group are preferable because they are mildly hydrolyzable and easy to handle.

In the general formula (1), examples of the alkyl group having 1 to 20 carbon atoms in R ¹ include linear or branched alkyl groups such as a methyl group and an ethyl group, and cyclic alkyl groups such as a cyclohexyl group. Among these, from the viewpoint of reactivity, R ¹ is particularly preferably a methyl group.

  In the curable resin (A), the main chain skeleton to which the hydrolyzable silyl group represented by the general formula (1) is bonded is polyoxyalkylene, vinyl polymer, saturated hydrocarbon polymer, unsaturated hydrocarbon. Main chain skeletons generally used in resins such as polymers, polyesters, polycarbonates, silicone resins such as polydimethylsiloxane, modified silicone resins, silylated urethane resins, and the like. The main chain skeleton is preferably polyoxyalkylene from the viewpoints of availability, film properties of the cured product, and the like.

  As the curable resin (A), a commercial product sold as a silicone resin or a modified silicone resin may be used. Examples of such commercially available products include Kaneka Corporation's Silyl Series, MS Polymer Series, MA Series, SA Series, OR Series, Epion Series; Asahi Glass Co., Ltd. ES Series, ESGX Series; Evonik Degussa Company's Silane Modified polyalphaolefin, Shin-Etsu Chemical Co., Ltd. KC series, KR series, X-40 series; Toagosei Co., Ltd. XPR series, ARUFON US series; Soken Chemical Co., Ltd. Actflow series, etc. are mentioned.

  A curable resin (A) can be used individually or in combination of 2 or more types.

  As content of curable resin (A) in the composition for unevenness adjustment, it is preferable that it is 5 mass%-30 mass% with respect to the total solid contained in a composition, and 10 mass%-25 mass%. % Is more preferable.

[Epoxy compound (B)]
The composition for unevenness adjustment contains an epoxy compound (B).
The epoxy compound (B) is a compound having one or more epoxy groups in the molecule.
In the composition for unevenness adjustment, by using the curable resin (A) and the epoxy compound (B) in combination, the unevenness adjustment layer formed by the composition for unevenness adjustment, the base material, and the reaction curing type adhesion Adhesion with the layer formed with the agent and water resistance of the uneven adjustment layer are improved.

  Specific examples of the epoxy compound (B) include bisphenol A type epoxy resins, bisphenol F type epoxy resins, bisphenol S type epoxy resins, bisphenol AD type epoxy resins, novolac type epoxy resins, epoxy resins obtained by epoxidizing amines, and heterocyclic rings. Conventionally known epoxy group-containing compounds such as a compound containing one or more oxirane rings in one molecule, such as an epoxy resin having an alicyclic ring, an alicyclic epoxy resin, and a urethane-modified epoxy resin having a urethane bond, may be mentioned.

  A commercially available product may be used as the epoxy compound (B). Examples of the commercially available products include: Epicron series manufactured by DIC Corporation; Celoxide series manufactured by Daicel Chemical Industries, Ltd., Epolide series, EHPE series, Cyclomer series; Epicoat series manufactured by Mitsubishi Chemical Corporation, D. Chemicals manufactured by Dow Chemical Japan Co., Ltd. E. R. Although series etc. are mentioned, it is not necessarily limited to these.

  An epoxy compound (B) can be used individually or in combination of 2 or more types.

  As content of the epoxy compound (B) in the composition for unevenness adjustment, it is preferable that it is 0.1 mass%-10 mass% with respect to the total solid contained in a composition, 0.5 mass% More preferably, it is -5 mass%.

[Non-reactive liquid component (C)]
The composition for unevenness adjustment contains a non-reactive liquid component (C).
The non-reactive liquid component (C) is a good workability when adjusting the physical properties such as hardness and elongation of the cured product (non-land adjustment layer) obtained from the non-land adjustment composition and forming the non-land adjustment layer. It is a component contained for the purpose of adjusting the viscosity and viscosity ratio for maintaining the viscosity.

Examples of the non-reactive liquid component (C) include components described later as a plasticizer (c1) and a diluent (c2).
A non-reactive liquid component (C) can be used individually or in combination of 2 or more types.

  The content of the non-reactive liquid component (C) in the composition for adjusting the unevenness is 100 parts by mass in total of the hydrolyzable silyl group-containing curable resin (A) and the epoxy compound (B) which are curable components. 70 parts by mass to 150 parts by mass, preferably 75 parts by mass to 130 parts by mass, and more preferably 80 parts by mass to 100 parts by mass.

When the content of the non-reactive liquid component (C) is less than 70 parts by mass, the uneven adjustment layer (cured product) formed by the uneven adjustment composition becomes hard, and the space between the base material and the exterior material It becomes impossible to relieve the distortion that occurs in Moreover, the viscosity of the composition for unevenness adjustment becomes high too much, and the workability | operativity of unevenness adjustment falls.
If the content of the non-reactive liquid component (C) is more than 150 parts by mass, the unevenness adjusting layer (cured product) formed by the unevenness adjusting composition becomes brittle, and the exterior material floats over a long period of time. Etc. cannot be prevented. In addition, when the composition for adjusting the unevenness is applied to the wall surface or the like, dripping occurs and the workability is lowered, and the formed unevenness adjusting layer has a desired layer thickness necessary for the unevenness adjustment. I can't get it.

<Plasticizer (c1)>
The plasticizer (c1) is a compound that can be contained in the composition for adjusting unevenness as a non-reactive liquid component (C) for the purpose of adjusting the physical properties (elasticity) of the cured product.

  As the added amount of the plasticizer (c1) is increased, the cured non-land adjustment layer (cured product) formed by the composition for adjusting unevenness tends to be soft.

  The plasticizer (c1) is a compound having a boiling point of 250 ° C. or higher. When a plasticizer having a boiling point lower than 250 ° C. is used, the plasticizer in the unevenness adjusting material volatilizes with time, so that the physical properties of the cured product change (harden), which is not preferable.

  Examples of the plasticizer (c1) include polypropylene glycol (PPG), polyethylene glycol (PEG), a copolymer of propylene oxide (PO) and ethylene oxide (EO), a phthalate ester compound (dioctyl phthalate (DOP)) , Dibutyl phthalate (DBP), diisononyl phthalate (DINP), diisodecyl phthalate (DIDP), butyl benzyl phthalate (BBP), etc.), alkylsulfonic acid ester compounds, acrylic resins, adipic acid ester compounds, hydrocarbons System compounds and the like.

  In particular, it is preferable from the viewpoint of compatibility and the like that a compound of the same type as the main chain of the curable resin (A) is used as a plasticizer. Since the main chain of the curable resin (A) is preferably polyoxyalkylene, polypropylene glycol (PPG), polyethylene glycol (PEG), a copolymer of propylene oxide (PO) and ethylene oxide (EO) is plasticized. It is preferable to use it as an agent.

  A plasticizer (c1) can be used individually or in combination of 2 or more types.

  When the plasticizer (c1) is contained, the content thereof is preferably 10 parts by mass to 150 parts by mass with respect to a total of 100 parts by mass of the curable resin (A) and the epoxy compound (B) which are curable components. Part, more preferably 40 to 100 parts by weight, and particularly preferably 45 to 80 parts by weight.

  When the blending amount of the plasticizer (c1) is less than 10 parts by mass, the unevenness adjusting material becomes hard, and the distortion between the concrete base and the exterior material may not be alleviated. On the other hand, when the blending amount of the plasticizer (c1) is more than 150 parts by mass, the content of the curable resin (A) is relatively reduced, and the unevenness adjusting layer (cured product) becomes brittle, or the unevenness adjustment. The layer (cured product) becomes too soft, and when applying the reactive curable adhesive in the process Y, the combs used for coating pick up unevenness and the smooth surface is damaged, or the ground is soft. In some cases, the workability of the eye iron may deteriorate.

[Diluent (c2)]
Diluent (c2) is contained in the composition for adjusting unevenness as a non-reactive liquid component (C) for the purpose of adjusting the viscosity of the composition for adjusting unevenness and the workability when forming the unevenness adjusting layer. It is a compound that can be made.

Diluent (c2) is a compound having a boiling point of 250 ° C. or lower and no reactivity with the curable resin (A).
Moreover, as a diluent (c2), the thing which volatilizes after formation of a non-land adjustment layer and finally hardly remains in a non-land adjustment layer is preferable.

As the diluent (c2), a general organic solvent can be preferably used.
Examples of the organic solvent include alkylbenzene solvents such as benzene, toluene and xylene, saturated hydrocarbon solvents such as heptane and hexane, hydrocarbon solvents such as mineral spirits and petroleum solvents, isoparaffin compounds, trichloroethylene, methylene chloride, Halogen solvents such as perchloroethylene, ketone solvents such as acetone, methyl ethyl ketone, and methyl isobutyl ketone, ester solvents such as ethyl acetate, butyl acetate, and isobutyl acetate, alcohol solvents such as methanol, ethanol, isopropanol, and butanol Can be mentioned.

  When the diluent (c2) is contained, the content is preferably 10 parts by mass to 80 parts by mass with respect to a total of 100 parts by mass of the curable resin (A) and the epoxy compound (B), and more. Preferably they are 15 mass parts-60 mass parts, Most preferably, they are 20 mass parts-50 mass parts.

  When there is less content of a diluent (c2) than 10 mass parts, the viscosity of the composition for unevenness adjustment may be high, and workability | operativity may fall. On the other hand, if the content of the diluent (c2) is more than 80 parts by mass, the unevenness-adjusting material shrinks due to volatilization of the diluent (c2) and the dimensional stability decreases, or the stress (stress associated with the shrinkage) ) May occur.

[Inorganic filler (D)]
The composition for unevenness adjustment contains an inorganic filler (D).
The inorganic filler (D) gives the toughness adjusting layer (cured product) toughness, adjusts the physical properties of the cured product to improve the adhesive strength, Viscosity ratio).

  In the composition for adjusting the unevenness, the higher the thixotropic property (viscosity ratio), the higher the viscosity at low shear and the lower the viscosity at high shear. That is, by increasing the viscosity at low shear, even when the composition for adjusting unevenness is applied to a vertical surface, dripping or the like of the composition for adjusting unevenness hardly occurs, and further, the viscosity at high shear The lower the resistance, the less the resistance when spreading the unevenness adjusting composition on the surface of the base material with a trowel, and the workability is improved.

  Examples of the inorganic filler (D) include calcium carbonate, magnesium carbonate, clay, talc, silica, fumed silica, glass balloon, aluminum hydroxide, and magnesium hydroxide. Although materials are mentioned, it is not limited to these.

  The effect of imparting thixotropy increases as the particle size of the inorganic filler is finer (as the specific surface area is larger). Therefore, by using the inorganic filler (D) with a finer particle size, greater thixotropy is achieved. Is obtained.

Further, as the inorganic filler (D) having a fine particle diameter, thixotropic properties are further enhanced by using a surface-treated agent.
As the surface treatment agent, fatty acids and unsaturated fatty acids represented by palmitic acid, caprylic acid, capric acid, lauric acid, stearic acid, arachidic acid, behenic acid, lignoceric acid, oleic acid, linoleic acid, linolenic acid, and the like, and And carboxylic acids such as rosin acid compounds and esters thereof, silane compounds such as hexamethyldisilazane, chlorosilane, and aminosilane, paraffin compounds, and the like, but are not limited thereto.
Surface-treated with a surface treatment agent is applied, examples of the inorganic filler particle size finer (D) an inorganic filler (d1) is exemplified et al are described below, inorganic filler (D) in the present invention Includes a surface-treated inorganic filler (d1) having a particle diameter of 20 nm to 60 nm .

By treating the surface of the inorganic filler with the surface treatment agent, aggregation of particles of the inorganic filler is reduced, and thixotropic property is increased by improving dispersibility.
Further, thixotropy is enhanced by the interaction between the surface treatment agents and the interaction between the surface treatment agent and the components contained in the composition for adjusting unevenness.

  By blending the inorganic filler (D) having a large particle diameter into the unevenness adjusting material, the workability of the unevenness adjusting material, in particular, the cutting ability is improved.

  Here, “trowel cutting ability” means that the composition for adjusting the unevenness is spread smoothly on the surface of the base material using an application tool such as a trowel to form an application layer, and the application tool is separated from the application layer. It is the ease of separation of the composition for unevenness adjustment from the applicator.

  Content of the inorganic type filler (D) in the composition for unevenness adjustment is 150-400 mass parts with respect to a total of 100 mass parts of curable resin (A) and an epoxy compound (B), Preferably they are 200 mass parts-380 mass parts, More preferably, they are 250 mass parts-350 mass parts.

  If the content of the inorganic filler (D) is less than 150 parts by mass, the thixotropy of the composition for adjusting the unevenness becomes low, and dripping or the like may occur when the composition for adjusting the unevenness is applied to the vertical surface. It becomes easy to get up. Moreover, when there is more content of an inorganic type filler (D) than 400 mass parts, the non-land adjustment layer (hardened | cured material) formed with the composition for non-surface adjustment will become weak, and it will be in the exterior material over a long period of time. Can not prevent floating. Moreover, the viscosity of the composition for unevenness adjustment also becomes high, and workability | operativity at the time of forming an unevenness adjustment layer falls.

An inorganic type filler (D) can be used individually or in combination of 2 or more types.
The inorganic filler (D) includes a surface-treated inorganic filler (d1) having a particle diameter of 20 nm to 60 nm, and further has a particle diameter of 150 μm to 350 μm and has no surface treatment. It is preferable that (d2) is included.

[Surface-treated inorganic filler (d1) having a particle size of 20 to 60 nm]
The surface-treated inorganic filler (d1) having a particle diameter of 20 nm to 60 nm is used to impart thixotropic properties to the unevenness adjusting composition.

  The particle diameter of the inorganic filler (d1) is 20 nm to 60 nm, preferably 20 nm to 40 nm. If the particle diameter of the surface-treated inorganic filler is smaller than 20 nm, the filler is likely to agglomerate, and this is not preferable because the filler will flutter when producing a composition for adjusting unevenness. On the other hand, if the particle diameter of the surface-treated inorganic filler is larger than 60 nm, the effect of imparting thixotropy is small, and therefore it is not preferable because it must be blended in a large amount in the composition.

  As the inorganic filler (d1), the particle diameter of 20 to 60 nm is obtained by treating the surface of the filler mentioned as the filler applicable as the inorganic filler (D) with a surface treating agent. The thing which is is mentioned.

  A commercial item can also be used as an inorganic type filler (d1). Examples of the commercially available products include MSK-C, MSK-K, Calfine 200M, Calfine 500, Carlex 100, Carlex 300, MS-100M, Sealets 200, N-2, MC-K, Unigros 1000 (or more, Maruo Calcium Co., Ltd. trade name), Visco Excel 30 and Visco Excel 30-K (above, trade name of Shiraishi Calcium Co., Ltd.) and the like, but are not limited thereto.

  An inorganic type filler (d1) can be used individually or in combination of 2 or more types.

  When the inorganic filler (d1) is contained, the content is preferably 100 to 300 parts by mass with respect to a total of 100 parts by mass of the curable resin (A) and the epoxy compound (B), and more. Preferably it is 110-250 mass parts, Most preferably, it is 120-200 mass parts. If the amount of the inorganic filler (d1) is less than 100 parts by mass, the effect of imparting thixotropy may be reduced. On the other hand, if the amount of the inorganic filler (d1) is more than 300 parts by mass, the thixotropic property increases but the viscosity also increases and the workability may decrease.

[Non-surface treated inorganic filler (d2) having a particle size of 150 to 350 μm]
Workability at the time of forming a non-land surface adjustment layer, in particular, trowel cutting property, by incorporating the surface-untreated inorganic filler (d2) having a particle size of 150 μm to 350 μm in the non-land surface adjustment composition. Will be better.

  By incorporating the rough surface-untreated inorganic filler (d2) having a particle diameter of 150 μm to 350 μm in the composition for adjusting the unevenness, the filler (d2) becomes a trigger before being cured. It makes it easy to break the composition for land adjustment (a state in which the cohesive strength of the composition temporarily decreases), and improves the cutting ability. If the trowel cutting property is poor, the part where the trowel is separated from the composition for adjusting the unevenness (coating layer) becomes fuzzy, and if it is severe, problems such as swelling occur.

  Examples of the inorganic filler (d2) include calcium carbonate, silica sand, magnesium carbonate, clay, talc, silica, fumed silica, glass balloon, fly ash balloon, shirasu balloon, Examples of the filler include, but are not limited to, aluminum hydroxide and magnesium hydroxide.

  An inorganic type filler (d2) can be used individually or in combination of 2 or more types.

When the inorganic filler (d2) is contained, the content is preferably 10 parts by mass to 300 parts by mass with respect to a total of 100 parts by mass of the curable resin (A) and the epoxy compound (B). More preferably, they are 30 mass parts-250 mass parts, Most preferably, they are 50 mass parts-200 mass parts.
If the content of the inorganic filler (d2) is less than 10 parts by mass, the effect of improving the cutting ability may be reduced. On the other hand, if the content of the inorganic filler (d2) is more than 300 parts by mass, the uneven adjustment layer (cured product) may become brittle.

[Non-surface treated inorganic filler (d3) having a particle size of 30 μm to 100 μm]
As the inorganic filler (D), the inorganic filler (d1) and the inorganic filler (d2) together with a non-surface treated inorganic filler (d3) having a particle diameter of 30 μm to 100 μm are further contained. It is preferable.

  Along with the inorganic filler (d1) having a small particle diameter and the inorganic filler (d2) having a large particle diameter of 150 μm to 350 μm, the surface-untreated inorganic filler (d3) having a particle diameter of 30 μm to 100 μm. ), The effect of improving the dispersion failure caused by the difference in the particle size of each filler particle is improved, and the composition for adjusting the unevenness has a smoother viscosity and forms an uneven adjustment layer. The workability when doing so is improved.

  Examples of the inorganic filler (d3) include calcium carbonate, silica sand, magnesium carbonate, clay, talc, silica, fumed silica, glass balloon, fly ash balloon, shirasu balloon, Examples of the filler include, but are not limited to, aluminum hydroxide and magnesium hydroxide.

  An inorganic type filler (d3) can be used individually or in combination of 2 or more types.

  When the inorganic filler (d3) is contained, the content thereof is preferably 5 parts by mass to 150 parts by mass with respect to 100 parts by mass in total of the curable resin (A) and the epoxy compound (B). More preferably, it is 5 mass parts-100 mass parts, Especially preferably, they are 5 mass parts-80 mass parts.

  If the content of the inorganic filler (d3) is less than 5 parts by mass, the effect of improving the cutting ability by improving dispersibility may be reduced. On the other hand, if the content of the inorganic filler (d3) is more than 150 parts by mass, the content ratio of the inorganic filler (d2) may be relatively reduced, and the cutting ability may deteriorate.

[Calcium oxide, calcium hydroxide: component (E)]
The composition for adjusting unevenness further includes at least one component (E) selected from calcium oxide and calcium hydroxide with respect to a total of 100 parts by mass of the curable resin (A) and the epoxy compound (B). It is preferable to contain 1 mass part-100 mass parts. By containing at least one of calcium oxide and calcium hydroxide in the composition for adjusting unevenness, the water-resistant adhesion of the uneven adjustment layer can be improved.

  When the composition for unevenness adjustment contains component (E), only one of calcium oxide and calcium hydroxide may be contained, or both may be contained. From the viewpoint of storage stability of the composition for adjusting unevenness, it is preferable to contain calcium oxide.

When the component (E) is contained, the content is preferably 1 part by mass to 100 parts by mass, more preferably 100 parts by mass with respect to the total of 100 parts by mass of the curable resin (A) and the epoxy compound (B). Is 3 to 50 parts by mass, particularly preferably 5 to 40 parts by mass.
If the content of the component (E) is less than 1 part by mass, the effect of improving water-resistant adhesion due to the addition may not be sufficiently exhibited. On the other hand, when there is more content of a component (E) than 100 mass parts, a non-land adjustment layer (hardened material) may become weak.

[Other ingredients]
In the composition for adjusting unevenness according to the present invention, as a component other than the above, any conventionally known compound can be blended.
Examples of such compounds include conventionally known curing catalysts, anti-aging agents, silane coupling agents such as vinyltrimethoxysilane and vinyltriethoxysilane, tackifiers such as phenolic resins, petroleum resins, and terpene resins, and amides. Thickeners such as wax, flame retardants such as halogen flame retardants, phosphorus flame retardants, silicone flame retardants, functional oligomers such as silicone alkoxy oligomers and acrylic oligomers, pigments, ethyl silicate, propyl silicate, butyl silicate, etc. Examples thereof include silicate compounds and oligomers thereof, titanate coupling agents, zirconium coupling agents, aluminum coupling agents, drying oils, and the like, and these can be used alone or in combination of two or more.

After the uneven adjustment layer formed in the process X is cured, the process Y is performed.
In the construction method of the present invention, it is not necessary to perform a special post-treatment such as high-pressure washing before the process Y is performed after the unevenness adjusting layer is cured.

[Process Y]
In the process Y, the exterior material is pasted on the base material on which the unevenness adjusting layer is formed in the process X by using a reactive curable adhesive.

  As an example of the process Y, first, a reactive curable adhesive is applied on the base material that has been adjusted for unevenness in the process X. The reaction curable adhesive may be applied to the region where the exterior material is attached.

  The application method of the reactive curable adhesive in the process Y is not particularly limited, and an application method commonly used in this technical field such as application using an applicator such as a trowel can be applied.

  The application amount of the reactive curable adhesive is appropriately set according to the shape of the application surface, the application area, and the like.

(Reaction curable adhesive)
As the reactive curable adhesive used in the process Y, a known adhesive used for bonding the base material and the exterior material can be applied.
From the viewpoint of adhesion to the base material and the unevenness adjusting layer and durability, a modified silicone adhesive is preferable as the reactive curable adhesive. In particular, when used for exterior use, it is more preferable to use a modified silicone / epoxy resin adhesive having water-resistant adhesion.
Moreover, it is more preferable that it is a one-pack type adhesive from the viewpoints of simplification of blending and suppression of blend blur.

The modified silicone resin is a curable resin in which the hydrolyzable silyl group is an alkoxysilyl group, and is widely used as a base polymer for sealants, adhesives, paints and the like. The modified silicone resin is a so-called moisture curable polymer in which an alkoxysilyl group, which is a hydrolyzable silyl group, is hydrolyzed and crosslinked with moisture in the atmosphere. Examples of the moisture curable polymer include polymers described in JP-A-52-73998, JP-A-63-112642, and the like.
By applying a modified silicone / epoxy resin adhesive obtained by adding an epoxy resin to a modified silicone resin, adhesion to various adherends and water-resistant adhesion are improved.

  Commercially available products can also be used as the reactive curable adhesive including the modified silicone resin adhesive and the modified silicone / epoxy resin adhesive that can be applied as the reactive curable adhesive used in the process Y. Examples of the commercially available products include, for example, Konishi Co., Ltd., EFREC Style One Series, Bond EMS20; Cemedine Co., Ltd. Tile Ace Series; INAX Co., Ltd. One Pack Boy Series; Although series etc. are mentioned, it is not limited to these.

(Attaching exterior materials)
Following the application of the reactive curable adhesive, an exterior material is applied.
Examples of the exterior material include tiles, stones, bricks, exterior boards, and the like. The construction method of the present invention can be particularly suitably applied to tile attachment.
Although it does not specifically limit as a kind of tile, It is preferable that it is a tile which satisfy | fills the standard described in JISA5209 (2008 edition).

[Other processes]
In the construction method of the present invention, in addition to the process X and the process Y, other processes may be included as necessary. Examples of the other processes include a drying process performed after the processes X and Y, a waterproofing process, a sealing process, a joint filling process, and the like.

  Embodiments of the construction method of the present invention will be described with reference to the drawings, but the present invention is not limited thereto.

-Actual situation example 1
FIG. 1 is a schematic cross-sectional view showing an example of an embodiment of the method of the present invention.
In FIG. 1, 1 indicates a base material made of concrete. In embodiment example 1, the non-land adjustment composition is applied so as to fill only the non-land portions existing on the surface of the base material 1 and cured to form the non-land adjustment layer 2 (cured product). (Step X).
Next, after applying the reactive curable adhesive 3 to a predetermined region on the surface of the base material 1 after the formation of the unevenness adjusting layer 2, the tile 4 as an exterior material is pasted (step Y).
After the reaction curable adhesive 3 is cured, the joint is sealed (not shown).

Embodiment Example 2-
FIG. 2 is a schematic cross-sectional view showing an example of another embodiment of the construction method of the present invention. Reference numerals shown in FIG. 2 denote the same elements as those in FIG.
In Embodiment 2 shown in FIG. 2, the unevenness adjusting layer 2 formed so as to fill only the uneven portion existing on the surface of the base material 1 in the embodiment example 1 shown in FIG. Except for forming over the whole, the process similar to Example 1 is implemented.

  EXAMPLES Hereinafter, although an Example of this invention is given and this invention is demonstrated concretely, this invention is not restrict | limited to these.

  First, in the Examples and Comparative Examples, details of each component used for adjusting the composition for adjusting the unevenness are shown below.

<Curable resin (A)>
Curable resin (A-1): Modified silicone resin (trade name: SILYL EST280, manufactured by Kaneka Corporation, viscosity: 7000 mPa · s)

<Epoxy compound (B)>
・ Bisphenol A type epoxy resin (trade name: Epicoat 828, manufactured by Japan Epoxy Resin Co., Ltd.)
・ 3-Glycidoxypropylmethoxysilane (trade name: KBM403, manufactured by Shin-Etsu Chemical Co., Ltd.)

<Non-reactive liquid component (C)>
Plasticizer (c1): Propylene glycol (trade name: ADEKA polyether P3000, manufactured by ADEKA, molecular weight: 3000)
Diluent (c2): Isoparaffin hydrocarbon (trade name: IP Solvent 1620, manufactured by Idemitsu Kosan Co., Ltd.)

<Inorganic filler (D)>
Inorganic filler (d1): calcium carbonate surface-treated with a fatty acid (trade name: Visco Excel 30, manufactured by Shiraishi Calcium Co., Ltd., average particle size: 30 nm)
Inorganic filler (d 3 ): Glass balloon (trade name: Fuji Balloon S-35, manufactured by Fuji Silysia Chemical Ltd., average particle size: 40 μm)
Inorganic filler (d 2 ): calcium carbonate (trade name: NSK-1, manufactured by Nichetsu, average particle size: 260 μm)

<Ingredient (E)>
・ Calcium oxide (E): Calcium oxide (trade name: Volmic, manufactured by Aokura Lime Industry Co., Ltd.)

<Other ingredients>
Curing catalyst (1): tin catalyst (trade name: Neostan U-700, manufactured by Nitto Kasei Co., Ltd., curing catalyst for curable resin (A))
・ Tetraethoxysilane (trade name: DYNASYLAN A, manufactured by Evonik Degussa Japan)
Ketimine compound (1): (trade name: Epicure H-30, manufactured by Mitsubishi Chemical Corporation)

  The composition for unevenness adjustment (the composition for unevenness adjustment of Examples 1-3) applied to the construction method of the present invention, and the composition for unevenness adjustment for comparison (the unevenness adjustment of Comparative Examples 1-6) The composition for use was prepared as follows. About each obtained unevenness adjustment composition, the physical property and the performance at the time of applying to the construction method of this invention were evaluated.

[Example 1]
Planetary mixer containing 90 g of curable resin (A-1), 7.0 g of bisphenol A type epoxy resin, 60 g of plasticizer (c1), 200 g of surface-treated inorganic filler (d1), and 10 g of calcium oxide (E) The mixture was kneaded while heating and dehydrating at 100 ° C. for 1 hour under reduced pressure, cooled to room temperature, 3 g of 3-glycidoxypropyltrimethoxysilane, 35 g of diluent (C-2), and curing catalyst. 1 g, tetraethoxysilane 7 g, and ketimine compound 4 g were added and kneaded for 15 minutes under reduced pressure to obtain the composition for adjusting unevenness of Example 1.

[Example 2]
In the preparation of the composition for adjusting the unevenness of Example 1, the surface-treated inorganic filler (d1) was 160 g, the inorganic filler (d 3 ) 10 g, and the inorganic filler (d 2 ) 150 g before heat dehydration. Except for the addition, a composition for adjusting unevenness of Example 2 was obtained in the same manner as Example 1.

[Example 3]
In the preparation of the unevenness adjusting composition of Example 2, the unevenness adjusting composition of Example 3 was obtained in the same manner as in Example 2 except that the calcium oxide (E) was changed to 100 g.

[Comparative Example 1]
In the preparation of the composition for adjusting unevenness of Example 2, the composition for adjusting unevenness of Comparative Example 1 was obtained in the same manner as in Example 2 except that the calcium oxide (E) was changed to 150 g.

[Comparative Example 2]
In the preparation of the composition for adjusting unevenness of Example 2, the composition for adjusting unevenness of Comparative Example 2 was performed in the same manner as in Example 2 except that 40 g of the plasticizer (c1) and 10 g of the diluent (c2) were used. I got a thing.

[Comparative Example 3]
The composition for adjusting unevenness of Comparative Example 3 was the same as that of Example 2 except that the plasticizer (c1) was changed to 120 g and the diluent (c2) was changed to 70 g in the preparation of the unevenness adjusting composition of Example 2. I got a thing.

[Comparative Example 4]
In the preparation of the composition for adjusting unevenness of Example 1, Example 1 was carried out except that 40 g of the plasticizer (c1), 100 g of the inorganic filler (d1) subjected to surface treatment, and 10 g of the diluent (c2) were used. In the same manner as above, a composition for adjusting unevenness of Comparative Example 4 was obtained.

[Comparative Example 5]
In the preparation of the composition for adjusting unevenness in Example 2, 100 g of the plasticizer (c1), 320 g of the inorganic filler (d1) subjected to the surface treatment, 20 g of the inorganic filler (d 3 ), and the inorganic filler ( the d 2) 300 g, in a similar manner except that diluent (c2) was 50g as in example 2 to obtain the uneven surface conditioning composition of Comparative example 5.

[Comparative Example 6]
In the preparation of the composition for adjusting unevenness in Example 2, the inorganic filler (d1) subjected to the surface treatment was not blended, the inorganic filler (d 3 ) was 20 g, and the inorganic filler (d 2 ) was 300 g. A composition for adjusting unevenness of Comparative Example 6 was obtained in the same manner as Example 2 except that.

[Evaluation]
(1) Viscosity and Viscosity Ratio of Composition for Adjusting Unevenness For the composition for adjusting unevenness prepared in Examples and Comparative Examples, a B-type viscometer (Tokyo Keiki Co., Ltd.) is used in accordance with JIS K6833-1. The viscosity (viscosity A) measured at a rotational speed of 1 r / min and the viscosity (viscosity B) measured at a rotational speed of 10 r / min were measured under a temperature condition of 23 ° C.
Further, the viscosity ratio (A / B) was calculated based on the measured viscosity A and B of each composition.
The results are shown in Table 1.

(2) Dumbbell physical property measurement and evaluation of cured material physical property (2-1) Dumbbell physical property measurement About the cured product of each unevenness adjusting composition prepared in Examples and Comparative Examples, maximum tensile strength in accordance with JIS A5557 The elongation at break was measured. Details of the measurement method are as follows. The measurement results are shown in Table 1.

-Measurement method-
After each unevenness adjustment composition prepared in Examples and Comparative Examples was uniformly filled into a mold having a depth of 2 mm and cured at 23 ° C. ± 2 ° C. and 50 ± 10% RH for 4 weeks, A dumbbell-shaped No. 5 test piece defined in JIS K6251 was collected.
Using the autograph made by Shimadzu Corporation under the conditions of 23 ° C. ± 2 ° C. and 50 ± 10% RH, the tensile strength was set to 100 mm / min, and the obtained test piece was applied until the test piece broke The maximum tensile strength (N / mm ² ) and elongation at break (%) were measured.

(2-2) Evaluation of cured product properties Based on the measurement results obtained above, the cured product properties were evaluated based on the following evaluation criteria.
○: The maximum tensile strength of dumbbell physical properties is 0.4 N / mm ^{2 to} 2.0 N / mm ² , the elongation at break is 40 to 200% ×: The maximum tensile strength of dumbbell physical properties is 0.4 N / mm ^{2 to} 2.0 N / mm ² , elongation at break is not 40 to 200%.

(3) Evaluation of workability Evaluation was made on the workability when the unevenness adjusting compositions prepared in the examples and comparative examples were spread on a vertical wall surface composed of a cemented hardened body using a trowel. went. Evaluation criteria are shown below.
◎: Workability for spreading the paint was very good ○: Workability for spreading the paint was good ×: The viscosity of the composition for adjusting the unevenness was high, the work on the iron was heavy, and the workability was bad Things xx: Viscosity / viscosity ratio of the composition for unevenness adjustment is low, and it hangs down when applied to a vertical surface

(4) Iron cutting ability Each composition for adjusting unevenness prepared in Examples and Comparative Examples is spread on a vertical wall surface composed of a cement-based cured body using a iron, and the iron is adjusted for unevenness. The separation of the iron from the composition for adjusting the unevenness at the time of releasing from the iron was evaluated as the iron cutting ability. Evaluation criteria are shown below.
◎: Very good iron cutting ability ○: Good iron cutting ability ×: Bad iron cutting ability

(5) Base adhesion The unevenness adjusting composition prepared in Examples and Comparative Examples was applied to a mortar plate so as to have a thickness of about 2 mm to form an unevenness adjusting composition layer. After curing the formed unevenness adjusting composition layer at 23 ° C. ± 2 ° C. and 50 ± 10% RH for 4 weeks, the unevenness adjusting composition layer was peeled by hand, and the resistance at that time was evaluated. In addition, when peeling the composition layer for adjusting unevenness by hand, in order to prevent the composition for adjusting unevenness from adhering to the mortar plate, a Teflon (registered trademark) tape is previously applied to the mortar plate. I stuck it. Evaluation criteria are shown below.
○: There was a feeling of resistance and showed good adhesiveness ×: Although it was adhered to the base, it had a low resistance to peeling

(6) Evaluation of adhesion of exterior material Each unevenness adjusting composition prepared in Examples and Comparative Examples was applied to a mortar plate to a thickness of about 2 mm, and 23 ° C. ± 2 ° C., 50 ± 10 Cured for 7 days at% RH. Bond Effleck Style One (Konishi Co., Ltd., modified silicone / epoxy resin adhesive), which is a reactive curable adhesive, is applied to the formed composition layer for adjusting the unevenness according to JIS A 5557 (2006 version). After applying using the standard crisp goblet (average coating amount: 2 Kg / m ² ) described in ¹ ), a ceramic tile of 45 mm × 45 mm × 7 mm specified in JIS A5209 is pasted, and 23 ° C. ± 2 ° C., 50 ± 10 It was cured with% RH for 4 weeks to obtain a test specimen for evaluating adhesion.
Using the obtained specimen, following the bond strength test described in JIS A 5557, using an autograph manufactured by Shimadzu Corporation under the conditions of 23 ° C. ± 2 ° C. and 50 ± 10% RH, the tensile speed A tensile test was performed at 3 mm / min, and the maximum load and fracture state until breaking were measured.
Evaluation criteria are shown below.
○: The maximum load is 0.6 N / mm ² or more, and the fracture at the interface between the composition layer for adjusting the unevenness and the reactive curable adhesive is less than 10% ×: The maximum load is 0.6 N / Mm ^{2 and} less than 10% destruction at the interface between the composition layer for unevenness adjustment and the reactive curable adhesive XX: The composition layer for unevenness adjustment and the reactive curable adhesive Destruction at the interface of 10% or more

As can be seen from the results shown in Table 1, the composition for adjusting the unevenness prepared in each example satisfies the viscosity, viscosity ratio, and dumbbell physical properties according to the present invention, workability, trowel cutting property, and curing. It was excellent in any evaluation of physical properties and adhesion.
Therefore, from these results, by carrying out the process X and the process Y according to the present invention using the composition for adjusting the unevenness prepared in the examples, even for the ground having unevenness, such as tiles It can be seen that an exterior construction method can be provided in which the exterior material can be stretched with excellent adhesion and followability and is excellent in workability.

DESCRIPTION OF SYMBOLS 1 Base material 2 Uneven adjustment layer 3 Reaction hardening type adhesive 4 Tile (exterior material)

Claims (8)

A viscosity A measured at a rotation speed of 1 r / min under a temperature condition of 23 ° C. in accordance with JIS K6833-1 using a B-type viscometer on at least a part of the surface of the base material is 1000 Pa · s to 3000 Pa ·. The viscosity ratio (A / B) between the viscosity A and the viscosity B measured at a rotation speed of 10 r / min is 6 or more, and the cured product obtained by curing is JIS A5557 dumbbell physical properties were measured in compliance, the maximum tensile strength is ^{0.4N / mm 2 ~2.0N / mm 2} , the uneven surface conditioning composition elongation of 40% to 200% at break Applying process X to form a non-land adjustment layer; and
An exterior construction method including a step Y of attaching an exterior material to the base material on which the unevenness adjusting layer is formed by using a reactive curable adhesive.   The exterior construction method according to claim 1, wherein the base material is a cement-based cured body. Before uneven surface conditioning composition for use in X as climate The curable resin having a hydrolyzable silyl group represented by the following general formula (1) (A), epoxy compound (B), a non-reactive liquid component (C) and an inorganic filler (D) including a surface-treated inorganic filler (d1) having a particle diameter of 20 nm to 60 nm , and the curable resin (A) and the epoxy compound ( The non-reactive liquid component (C) of 70 parts by mass to 150 parts by mass and the inorganic filler (D) of 150 parts by mass to 400 parts by mass with respect to a total of 100 parts by mass of B). The exterior construction method according to claim 2.
-SiR ¹ _n (X) _3-n (1)
(In General Formula (1), X represents a hydrolyzable group, R ¹ represents an alkyl group having 1 to 20 carbon atoms, and n represents 0, 1 or 2.)   The exterior construction method according to claim 3, wherein the non-reactive liquid component (C) contains at least one selected from a plasticizer (c1) and a diluent (c2). The exterior construction method according to claim 3 or 4, wherein the inorganic filler (D) further includes an inorganic filler (d2) having a particle diameter of 150 µm to 350 µm and having no surface treatment. The exterior construction method according to any one of claims 3 to 5 , wherein the inorganic filler (D) further includes an inorganic filler (d3) having a particle diameter of 30 µm to 100 µm and having no surface treatment. . Uneven surface conditioning composition for use in X as before climate further, at least one component selected from calcium oxide and calcium hydroxide (E), the curable resin (A) and the epoxy compound (B) The exterior construction method according to any one of claims 3 to 6, containing 1 to 100 parts by mass with respect to 100 parts by mass in total. Before curable adhesive used Y as climate is exterior method according to any one of claims 7 a is from claim 1 1 moisture-curable modified silicone resin based adhesive.