JP2009209651A - Moisture-conditioning building material, moisture-conditioning wall, surface treatment agent for construction, finish coating material for construction, and treating method for imparting moisture-conditioning property - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a finish coating material for construction which solves the problems caused by the use of an inorganic moisture-conditioning material as in an conventional art by using an organic moisture-conditioning material, imparts an excellent moisture-conditioning property by adding a small amount of moisture-conditioning material and prevents a dry crack after coating by reducing the water content, and to provide a moisture-conditioning wall which is treated with the finish coating material to obtain the moisture-conditioning property. <P>SOLUTION: The finish coating material for construction for finishing a wall surface of a building by coating is provided with the moisture-conditioning property by adding urea and/or a urea derivative. Preferably, 0.1 to 15 pts.wt. of the urea and/or the urea derivative is contained with respect to 100 pts.wt. of the main component including a binder resin, aggregate and water. The moisture-conditioning wall is obtained by coating the finish coating material for construction on a wall underlayer surface. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to a humidity control building material and a humidity control wall using moisture absorption / release performance of urea and / or urea derivatives, a building surface treatment agent and a building coating finish material, and a humidity control method for building materials and wall surfaces. .

Conventionally, in the construction field, many technologies that use moisture absorption and desorption performance of inorganic porous materials having nano-sized pores such as diatomaceous earth, allophane, and zeolite are provided as technologies for imparting moisture conditioning performance to walls and building materials. For example, Patent Document 1 proposes a humidity control coating material containing a porous lightweight aggregate such as diatomaceous earth and an acrylic resin emulsion as a binder resin.
JP 2004-256649 A

  In conventional humidity control coating materials and humidity control agents that utilize the moisture absorption and desorption performance of inorganic porous materials such as diatomaceous earth, it is necessary to increase the amount of inorganic porous material to obtain sufficient humidity control performance. (In the commercial product, inorganic porous material is blended by 40 to 70% of the whole). When a large amount of an inorganic porous material such as diatomaceous earth is blended in this way, it is necessary to increase the water content in order to ensure application workability to building materials and wall surfaces. When there is much moisture in this way, drying shrinkage in the drying process after application to building materials and wall surfaces increases, and so-called “dry out” becomes a problem.

  The present invention is excellent in humidity control performance by adding a small amount, and can be prepared using an architectural coating finish that can reduce moisture content and prevent drying after coating, and this architectural coating finish. It aims at providing the humidity control wall which gave the moisture treatment.

  The present invention also provides a building surface treatment agent that can easily provide moisture conditioning performance simply by application to a building material, a moisture conditioning building material using the building surface treatment agent, a building material, and a moisture conditioning treatment of a wall surface. It aims to provide a method.

  The humidity control building material of the present invention (Claim 1) is characterized in that the building material is provided with humidity control properties by adhering or impregnating urea and / or a urea derivative.

  The architectural surface treatment agent of the present invention (Claim 2) is characterized by comprising a liquid containing urea and / or a urea derivative.

  The architectural surface treatment agent according to claim 3 is the aqueous solution according to claim 2, wherein the concentration of urea and / or urea derivative is 1 to 30% by weight.

  The humidity control method for building materials according to the present invention (Claim 4) is characterized in that the building material is provided with humidity control properties by adhering or impregnating the building surface treatment agent of Claim 2 or 3 to the building material. And

  The humidity control method for a wall surface of the present invention (Claim 5) is characterized in that the wall surface is provided with humidity control by attaching the architectural surface treatment agent of Claim 2 or 3 to the wall surface.

  The architectural coating finish of the present invention (Claim 6) is provided with a humidity control property by blending urea and / or a urea derivative in the architectural coating finish for coating the wall surface of a building. Features.

  The architectural finish material of claim 7 is characterized in that, in claim 6, it comprises binder resin, aggregate and water, and said urea and / or urea derivative.

  The architectural finish material of claim 8 includes 0.1 to 15 parts by weight of urea and / or urea derivative in 100 parts by weight of the main component containing binder resin, aggregate and water in claim 7. It is characterized by.

  A humidity control wall according to the present invention (invention 9) is characterized in that the architectural finish material according to any one of claims 6 to 8 is applied to a wall base surface.

According to the present invention, urea and / or a urea derivative can impart an excellent humidity control function to building materials and wall surfaces. Urea ((H ₂ N) ₂ C═O) has been conventionally used as a moisturizing cream component, formaldehyde adsorbent, etc., and has been known for its moisturizing and adsorbing properties, but it is not known for its humidity control performance. It was not done.

  As a result of studying an organic humidity conditioning material that replaces an inorganic porous material such as diatomaceous earth, the present inventor has found that urea and urea derivatives have excellent moisture absorption and desorption performance.

  Such excellent humidity control performance of urea and urea derivatives is thought to be due to the fact that urea and urea derivatives have micropores that can hold water molecules in their crystal lattice, and under high humidity conditions In addition, moisture in the atmosphere dehumidifies when moisture in the atmosphere enters the micropores, and under dry conditions, moisture in the atmosphere is increased by releasing moisture that has been absorbed into the micropores. Restore performance.

  The humidity control building material of the present invention is provided with humidity control properties by adhering or impregnating urea and / or a urea derivative to the building material, and has an excellent humidity control function for the building material by a simple method. Can be granted.

  The architectural surface treatment agent of the present invention is composed of a liquid containing urea and / or a urea derivative, and is provided easily and inexpensively as, for example, a water-soluble aqueous solution of urea and / or a urea derivative.

  This building surface treatment agent is preferably urea and / or urea derivative aqueous solution having a concentration of about 1 to 30% by weight.

  The humidity control method of the building material or wall surface of the present invention is a method of imparting humidity conditioning performance using such a building surface treatment agent of the present invention, and the building surface treatment agent is applied to the building material or wall surface. The moisture control function can be easily imparted by adhering them by, for example, or impregnating a building material with a building surface treatment agent.

  The architectural finish material of the present invention is provided with humidity control by blending urea and / or a urea derivative, and contains inorganic components as compared with a finish material blended with a conventional inorganic porous material. The amount can be reduced. For this reason, it is possible to obtain good coating workability with a small amount of water, and it is possible to prevent drying out in the drying step after coating.

  The architectural finish material preferably contains a binder resin, an aggregate and water, and urea and / or a urea derivative (Claim 7). In this case, the main component includes the binder resin, the aggregate and water. It is preferable to contain 0.1 to 15 parts by weight of urea and / or urea derivative with respect to 100 parts by weight.

  The humidity control wall of the present invention is formed by applying the architectural finishing material of the present invention to the wall base surface, and has excellent humidity control performance.

  Hereinafter, embodiments of the present invention will be described in detail.

  In the present invention, urea and / or a urea derivative is used as a humidity control material. Only urea may be used, only a urea derivative may be used, or urea and a urea derivative may be used in combination.

  Specific examples of the urea derivative include allyl urea, dimethylol urea, malonyl urea, carbamyl urea, n-butyl urea, dibutyl urea, N, N-dimethyl urea, 1,3-dimethyl urea, N-methyl urea, hydroxy Urea, ethylurea, methylurea, creatinine, 1-acetyl-2-thiourea, N-acetylthiourea, N- (1-adamantyl) urea, amidinothiourea, aminourea hydrochloride, allylthiourea, 1-allyl-2- Thiourea, imidourea, 2-imidazolidinethione, 1- (2-chlorophenyl) -2-thiourea, guanylurea sulfate, sodium cyanourea, 1-cyano-3-methylisothiourea sodium, 1-cyclohexyl-3- (2 -Morpholinoethyl) thiourea, 1,3-diallylurea, 1,3-diethyl-2-thio Urea, 1- (3,4-dichlorophenyl) -2-thiourea, N, N′-dicyclohexylurea, 1,3-diphenylthiourea, 1,3-diphenylurea, 1,3-dibutyl-2-thiourea 1,1-dimethyl-2-selenourea, 1,3-dimethylthiourea, N, N′-dimethylthiourea, selenourea, tetramethylthiourea, 1,1,3,3-tetramethylurea, tetramethylurea, σ-tolylurea, m-tolylurea, 1- (1-naphthyl) -2-thiourea, 1- (3-hydroxyphenyl) urea, 1,3-bis (trimethylsilyl) urea, N, N-bis (2 -Hydroxyethyl) -N ′-(α, α-dimethyl-3-isopropenylbenzyl) urea, N, N-bis (2-hydroxypropyl) -N ′-(α, α-dimethyl-3-isopropenyl) Ndyl) urea, N, N′-bis (hydroxymethyl) urea, phenylacetylurea, phenylethylthiourea, 1-phenyl-3- (2-thiazolyl) -2-thiourea, 1-phenyl-2-thiourea , Phenylurea, tert-butylurea, 2-benzyl-2-thiopurea hydrochloride, benzylurea, N-formylurea, malonylthiourea, 1-methallyl-3-methyl-2-thiourea, o-methylisourea hemisulfate Salt, N-methylthiourea, 2-methyl-2-thiopseurea sulfate and the like. Among them, malonyl urea, carbamyl urea, N, N-dimethylurea, 1,3-dimethylurea, N-methylurea, creatinine, 1-allyl-2-thiourea, 2-imidazolidinethione, 1,1,3, 3-Tetramethylurea is preferable because it has a relatively high water solubility and is advantageous for the preparation of an aqueous solution. These urea derivatives may be used individually by 1 type, and may use 2 or more types together.

[Humidity control building materials]
The humidity control building material of the present invention is provided with humidity control properties by adhering or impregnating urea and / or a urea derivative to the building material.

  Here, there is no restriction | limiting in particular as building materials, A tile, brick, a gypsum board, a cement board, a quartz board, a plywood, concrete, mortar, etc. with at least the surface of an unglazed tile etc. are mentioned.

There is no particular limitation on the amount of urea and / or urea derivative adhering to or impregnated into the building material, and it is determined as appropriate depending on the type of building material and the humidity control performance required according to the application, but per unit surface area of the building material. It is preferable to set it as about 10-150 g / m < ² >. If the adhesion amount or impregnation amount of urea and / or urea derivative is less than this range, it is not possible to obtain a good humidity control function, and if it is too large, it may be deposited on the surface of the building material and cause defects in appearance. .

  Such a humidity control building material of the present invention can be easily manufactured by adhering or impregnating a building surface treatment agent of the present invention described below in detail to the building material according to the humidity control method of the present invention. it can.

[Surface treatment agent for construction]
The architectural surface treatment agent of the present invention is a liquid containing urea and / or a urea derivative, preferably an aqueous solution having a concentration of urea and / or urea derivative of 1 to 30% by weight, particularly 5 to 25% by weight.

  If the urea and / or urea derivative concentration in the building surface treatment agent is excessively low, the adhesion efficiency of urea and / or urea derivative when applied to a building material or the like is poor, and the humidity conditioning efficiency is inferior. If the urea and / or urea derivative concentration is excessively high, the solution stability may be reduced, and the viscosity of the aqueous solution may be excessively high.

  In addition, the humidity control building material of the present invention may contain other components other than urea and / or urea derivatives, such as fungicides, surfactants, ultraviolet absorbers, fragrances, preservatives, and the like. .

[Humidity control method]
The humidity control method for a building material according to the present invention is such that the building material is provided with humidity control by adhering or impregnating the above-described building surface treatment agent of the present invention to a building material having at least a porous surface. is there. The wall surface humidity control method of the present invention is applied to the wall surface by adhering the above-described architectural surface treatment agent of the present invention to a wall surface such as a tile wall, mortar wall, or board finish wall having a porous surface. It provides humidity conditioning.

  In order to attach the architectural surface treatment agent of the present invention to a building material or a wall surface, a method such as spray coating or brush coating can be employed. As a method of impregnating the building material with the building surface treatment agent of the present invention, a method of immersing the building material in a treatment tank containing the building surface treatment agent can be employed.

  After the building surface treatment agent is adhered to the building material or wall surface, or after the building material is impregnated with the building surface treatment agent, the building material is left as it is, or room temperature air or hot air is blown as necessary. To dry.

The amount of building surface treatment agent adhering to building materials or wall surfaces or the amount of building surface treatment agent impregnated to building materials is appropriately determined depending on the type of building materials and wall surfaces, the humidity control performance required according to the application, etc. However, the amount of urea and / or urea derivative per unit surface area of the building material or wall surface is preferably about 10 to 100 g / m ² . If the adhesion amount or impregnation amount of urea and / or urea derivative is excessively small, the humidity control performance may be insufficient, and if it is excessively large, an appearance defect due to deposition on the surface of the building material or the wall surface may occur.

[Building finishing materials]
The architectural finish material of the present invention is an architectural finish material for painting a wall surface of a building, and is provided with humidity control by blending urea and / or a urea derivative. Preferably, the architectural finish of the present invention comprises a binder resin, aggregate and water and urea and / or a urea derivative.

  There is no restriction | limiting in particular as binder resin, Any can be used suitably for what is used for the coating material for normal construction. Examples of the binder resin that can be used include polymer emulsions such as acrylic emulsion, urethane emulsion, polyvinyl acetate emulsion, ethylene vinyl acetate emulsion, and SRB latex. These polymer emulsions may be used alone or in combination of two or more.

  There are no particular restrictions on the aggregate, and any of the materials used for ordinary architectural finishes can be suitably used.For example, silica sand, cold sand, vermiculite, sand, glass powder, ceramic powder, pearlite, Fly ash or the like can be used. These aggregates may be used alone or in combination of two or more.

  Other architectural finishes include lubricants such as talc, clay, porcelain clay and kaolin, extender pigments such as calcium carbonate (light and heavy), aluminum hydroxide and silica, organic materials such as acrylics and cellulose ethers. -Based thickeners, inorganic thickeners such as bentonite, fiber materials such as plant fibers, inorganic fibers, synthetic fibers, pigments, dyes, UV absorbers, antioxidants, fungicides, dispersants, defoamers An agent, a surfactant, an antiseptic, an antifreezing agent and the like can be blended.

  The architectural coating finish of the present invention preferably comprises 100 weight parts of a binder resin, aggregate, water, and various additives such as lubricants and thickeners added as required, preferably in the following composition. It is prepared by blending 0.1 to 15 parts by weight, preferably 1 to 10 parts by weight of urea and / or urea derivative with respect to parts. If the blending amount of urea and / or urea derivative with respect to the main component is less than the above range, sufficient humidity control performance cannot be obtained, and if it is too large, it may be deposited on the wall surface and cause problems in appearance.

<Main component blend (parts by weight)>
Aggregate (especially cinnabar): 20-30
Binder resin (especially acrylic emulsion): 1-5
Lubricant (especially talc): 20-30
Thickener (especially cellulose ether thickener): 1 to 10
Water: 20-40

  Even if the blending amount of the binder resin in the main component is less than or greater than the above range, a wall surface excellent in durability cannot be formed on the basis of good coating workability.

  Moreover, the effect of adjusting the coating thickness and maintaining the strength can be obtained by blending the lubricant, but if the blending amount is more than the above range, the workability is deteriorated and the strength may be lowered. Moreover, moderate viscosity can be given to a coating finishing material by mix | blending a thickener.

  Further, in the present invention, by using urea and / or a urea derivative as the humidity control material, a humidity control effect can be achieved by adding a smaller amount than when an inorganic humidity control material is used, and the water blending amount is reduced. For this purpose, the amount of water in the main component is preferably not more than the above upper limit. However, if the amount of water blended is too small, the coating workability will be inferior, and the amount of water blended is preferably at least the above lower limit.

  The architectural coating finish of the present invention can be easily prepared by kneading a predetermined amount of binder resin, aggregate, water, other additives and the like and urea and / or urea derivative, Applicable to construction.

[Humidity control wall]
The humidity control wall of the present invention is obtained by applying the above-described architectural coating finish of the present invention to a wall base surface, and applying the architectural finish of the present invention to a wall base surface or an existing wall surface. It is formed by applying and coating according to a conventional method. As described above, the architectural coating finish of the present invention can reduce the amount of water blended, so that shrinkage during drying is suppressed and drying out is prevented.

  In addition, there is no restriction | limiting in particular in the application | coating thickness of the coating finish material for construction, It is set as about 3 mm or less like a normal coating finish material.

  Hereinafter, the present invention will be described more specifically with reference to examples and comparative examples.

Examples 1 and 2
After applying 20 wt% urea aqueous solution to the surface of 100 mm square unglazed tile by brushing or spraying so that the urea adhesion amount shown in Table 1 (urea adhesion amount after drying) is applied, one day at room temperature Dried.

  Thereafter, the humidity control performance was evaluated according to JIS A6909, and the results are shown in Table 1.

In addition, the numerical value of the evaluation result of the humidity control performance in Table 1 is the amount of moisture absorption (unit: g / m ² ) per unit area of the sample. The larger this value, the better the humidity control performance. The same applies to the following examples and comparative examples.

Comparative Example 1
Except that water was used in place of the urea aqueous solution, the humidity control performance was similarly evaluated using coating and drying in the same manner as in Example 1, and the results are shown in Table 1.

Example 3 and Comparative Examples 2 to 5
A building finish material is prepared by blending 3 parts by weight of the moisture conditioning or moisturizing component shown in Table 2 with 100 parts by weight of the coating finish main component having the following composition (however, in Comparative Example 2 humidity conditioning or moisture retention) Smoothing so that the coating thickness is 1.5 mm at a coating amount of 1.5 kg / m ^{2 on} the surface of a glass plate of 100 mm × 100 mm × 5 mm thickness respectively. After coating, the samples were allowed to stand for 7 days under conditions of a temperature of 23 ° C. and a humidity of 50%, and dried to prepare samples.

<Composition of main component of coating material (parts by weight)>
Acrylic emulsion: 5
Talc: 10
Silica sand: 40
Water: 30
Thickener (cellulose ether type): 5
Other additives (antifungal, antiseptic, antifreeze, colorant, etc.): 10

  About each sample, No. shown in Table 2 based on JISA6909. 1 to No. The humidity control performance over time under 9 environmental conditions was evaluated, and the results are shown in Table 2 and FIG. It shows that it is excellent in moisture absorption / release performance, so that the difference of the moisture holding amount with respect to a humidity change is large.

Examples 4-7, Comparative Examples 6-8
For 100 parts by weight of the main component of the finishing material of the same composition as in Example 3, the moisture conditioning or formaldehyde adsorbing component shown in Table 3 is blended in the amount shown in Table 3 to prepare an architectural finishing material (however, In Comparative Example 6, humidity control or formaldehyde adsorbing component was not blended), and using this architectural finish, each sample was prepared in the same manner as in Example 2, and the humidity control performance was similarly evaluated. Are shown in Table 3 and FIG.

  From the above results, it can be seen that urea exhibits excellent moisture absorption / release performance, and that it is possible to form a humidity control building material and humidity control wall with excellent humidity control performance using this moisture absorption / release performance.

It is a graph which shows the evaluation result of the humidity control performance of Example 3 and Comparative Examples 2-5. It is a graph which shows the evaluation result of the humidity control performance of Examples 4-7 and Comparative Examples 6-8.

Claims (9)

  A humidity control building material characterized in that it has a humidity control property by adhering or impregnating the building material with urea and / or a urea derivative.   A surface treatment agent for building comprising a liquid containing urea and / or a urea derivative.   The architectural surface treatment agent according to claim 2, which is an aqueous solution having a concentration of urea and / or a urea derivative of 1 to 30% by weight.   A building material humidity control method, wherein the building material is provided with humidity control properties by adhering or impregnating the building surface treatment agent of claim 2 or 3 to the building material.   4. A wall surface humidity control method, wherein the surface treatment agent for building of claim 2 or 3 is adhered to the wall surface to provide the wall surface with humidity control. In architectural finishing materials for painting the walls of buildings,
An architectural coating finish characterized by having humidity control by blending urea and / or a urea derivative.   The architectural finishing material according to claim 6, comprising a binder resin, an aggregate, water, and the urea and / or urea derivative.   In Claim 7, 0.1-15 weight part of urea and / or urea derivative are included with respect to 100 weight part of main components containing binder resin, an aggregate, and water, The coating finish material for buildings characterized by the above-mentioned.   A humidity control wall, wherein the architectural coating finish according to any one of claims 6 to 8 is applied to a wall base surface.

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