JP6315907B2 - Waterproof structure and waterproof construction method using two-component reaction curable resin composition - Google Patents

Description

  The present invention relates to a two-component reaction curable resin composition used in a waterproofing method, a waterproof structure using the two-component reaction curable resin composition, and a waterproofing method.

  The so-called asphalt waterproofing thermal method, which melts Bron asphalt at the construction site and forms a waterproof layer by laminating multiple pieces of asphalt roofing while pouring the molten Bron asphalt on the waterproof surface, is currently in terms of waterproof reliability. But it occupies the mainstream of waterproofing methods. The most excellent point of the construction method is that the asphalt has a low viscosity and excellent fluidity at the time of construction. It is in the point to be obtained.

The asphalt waterproofing thermal construction method is extremely excellent in waterproofing effect. However, in the construction method, normally 200 to 400 kg of asphalt for waterproofing construction is put in a melting pot capable of melting, and a waterproofing bronze by a heating source such as a propane burner is used. It is a method of melting asphalt to 250-300 ° C, and then transferring the melted asphalt to a small can that can be carried and forming a waterproof layer by attaching asphalt roofing while pouring with a handle, usually 3-6kg / m ^{2 The} asphalt melting work required is unavoidably carried out all day. The reason for melting at a temperature of 250 to 300 ° C. is that if the temperature is lower than that, the asphalt has poor fluidity and hinders waterproofing work. However, various problems have been pointed out, such as smoke and odor generated when melting asphalt is disliked by local residents, ignition of asphalt and burns of workers during handling.

  As measures for solving the above problems, several cooling methods using asphalt materials have been proposed. As one of the cooling methods, there is a waterproofing method in which a high-concentration modified asphalt emulsion and an isocyanate are mixed in situ and a roofing is laminated (Patent Document 1, Patent Document 2, and Patent Document 3). In this construction method, by mixing isocyanate with the emulsion, the isocyanate reacts with water, and there is an expression of adhesive force accompanying the destruction of the emulsion (aggregation of active ingredients). However, because it is an emulsion, it can cause bulges (especially outdoors) after applying the roofing. In addition, since emulsion is used, in the low temperature range of 5 ° C or lower, emulsion particles are united and it takes time and temperature to form a film. slow. Furthermore, since the roofing is pasted in an uncured state, it is not possible to ride on the top immediately after the pasting (the roofing is displaced or the film is thinned).

  As a cooling method using another asphalt material, there is a waterproofing method in which roofing is laminated using a one-component moisture-curing resin (modified silicone) blended with asphalt (Patent Document 4). In this construction method, since there is no mixing work, the construction is simple and gradually hardens with moisture, so there is no risk of uncured. However, it is dependent on the environment to cure to a deep part because of one-component moisture curing. Due to the method of attaching the roofing in an uncured state, it is not possible to ride on the top immediately after the attachment (the roofing is displaced or the film is thinned).

  As another asphalt-based cooling method, one-component curing comprising a reactive silicon group-containing organic polymer, a silanol condensation catalyst, an aqueous dispersion for improving adhesive strength at the bonding interface, a plasticizer, and a filler. There exists an adhesive resin composition (patent document 5). Since this one-part curable resin composition is one-part moisture-curing, it depends on the environment to cure to a deep part.

Japanese Patent No. 3516751 Japanese Patent No. 4042852 JP 2010-174229 A JP 2008-303541 A JP 2009-29972 A

  In the waterproofing method, the present invention can ensure safety because it can be handled at room temperature, and prevents adverse effects on the construction environment due to the occurrence of smoke, odors, etc., and curing that can be reliably cured regardless of environmental humidity It aims at providing a conductive resin composition.

The present invention is a two-component reaction curable resin composition for use in a waterproofing method, and is a two-component reaction curing comprising a hydrolyzable silyl group-end-modified resin and a curing agent A agent and an aqueous dispersion B agent. Mold resin composition.
The present invention is also a waterproof structure formed by laminating a roofing sheet, and is characterized by being laminated using the two-component reaction curable resin composition.
The present invention also provides a curable resin composition prepared by in-situ mixing an agent A containing a hydrolyzable silyl group terminal-modified resin and a curing catalyst and an agent B comprising an aqueous dispersion, and the prepared curable resin composition It is a waterproofing method that includes applying an object to a construction surface and attaching a roofing sheet while it is uncured.

The present invention includes the following aspects.
[1] A two-component reaction curable resin composition for use in a waterproof construction method, which is a two-component reaction curable type comprising a hydrolyzable silyl group-end-modified resin and a curing agent A agent and an aqueous dispersion B agent Resin composition.
[2] The two-component reaction curable resin composition according to [1], wherein the amount of the B agent is 0.1 to 30 parts by mass with respect to 100 parts by mass of the A agent.
[3] Aqueous dispersion is styrene butadiene styrene block copolymer emulsion, styrene butadiene copolymer emulsion, acrylonitrile butadiene copolymer emulsion, acrylic resin emulsion, polychloroprene emulsion, vinyl pyridine copolymer emulsion, polyisoprene emulsion. , Polybutadiene emulsion, vinyl chloride emulsion, vinylidene chloride emulsion, wax emulsion, urethane resin emulsion, vinyl acetate emulsion and ethylene / vinyl acetate copolymer (EVA) emulsion. The two-component reaction curable resin composition according to [1] or [2], wherein
[4] The two-component reaction curable resin composition according to [1] or [2], wherein the aqueous dispersion is an asphalt emulsion.
[5] The two-component reaction curable resin composition according to [1] or [2], wherein the aqueous dispersion is a silane emulsion.
[6] The two-component reaction curable resin composition according to [3] or [4], wherein the emulsion has a solid content of 30 to 85% by mass.
[7] The two-component reaction curable resin composition according to claim 5, wherein the amount of the active ingredient in the silane emulsion is 15 to 90% by mass.
[8] The two-component reaction curable resin composition according to any one of [1] to [7], wherein the agent A further contains a filler, a plasticizer, and an adhesion promoter.
[9] A waterproof structure formed by laminating roofing sheets, wherein the waterproof structure is laminated using the two-component reaction curable resin composition according to any one of [1] to [8]. Construction.
[10] The waterproof structure according to [9], wherein the roofing sheet has a spacer on the back surface.
[11] A curable resin composition is prepared by in-situ mixing A agent containing a hydrolyzable silyl group-end-modified resin and a curing catalyst and B agent comprising an aqueous dispersion, and the prepared curable resin composition is applied. A waterproofing method that involves applying to a surface and pasting a roofing sheet while uncured.
[12] The waterproofing method according to [11], wherein the roofing sheet has a spacer on the back surface.

Since the two-component reaction curable resin composition of the present invention is polymerized by mixing moisture into the system by combining the moisture curable resin composition and the aqueous dispersion, it cures quickly at room temperature, Reliable curing can be obtained regardless of environmental humidity.
By laminating with a roofing having a spacer, even if it rides on the roofing immediately after construction, the film does not become thin, and a certain waterproof quality can be ensured.

FIG. 1 is a cross-sectional view of one example of a waterproof structure. FIG. 2 is a bottom view of one example of a roofing sheet with a spacer. FIG. 3 is a cross-sectional view of one example of a roofing sheet with a spacer. FIG. 4 shows a construction example of a waterproof structure using a roofing sheet with a spacer.

The present invention relates to a two-component reaction curable resin composition used for a waterproofing method.
The two-component reaction curable resin composition of the present invention comprises an A agent and a B agent.
The agent A contains a hydrolyzable silyl group terminal modified resin and a curing catalyst.
B agent consists of an aqueous dispersion.

  The hydrolyzable silyl group terminal-modified resin used for the agent A refers to an organic polymer compound composed of a main chain and a hydrolyzable silyl group present at the terminal.

The hydrolyzable silyl group refers to a group represented by the formula (1).
-SiX _n R _3-n (1)
Where
X is a hydrolyzable group such as a halogen atom, an alkoxy group, an acyloxy group, an amide group, an amino group, an aminooxy group, a ketoximate group, a carbamoyl group, a mercapto group, or an alkenyloxy group, preferably a methoxy group or ethoxy group Alkoxy groups having 4 or less carbon atoms such as groups, acyloxy groups such as acetoxy groups, ketoximate groups such as acetoxymate groups and dimethylketoximate groups, N, N-dimethylamino groups, N-methylacetamide groups, propenyloxy groups, etc. And more preferably a methoxy group and an ethoxy group.
R is a monovalent hydrocarbon group or a halogenated hydrocarbon group. The hydrocarbon group is preferably an alkyl group or an aryl group, more preferably an alkyl group having 6 or less carbon atoms, and still more preferably an alkyl group having 3 or less carbon atoms. The halogenated hydrocarbon group is preferably the above hydrocarbon group having one or more chlorine atoms or fluorine atoms, more preferably the above-mentioned alkyl group having one or more chlorine atoms or fluorine atoms.
n is 1, 2 or 3.
Preferable specific examples of the hydrolyzable silyl group include trimethoxysilyl group, triethoxysilyl group, tripropoxysilyl group, methyldimethoxysilyl group, ethyldimethoxysilyl group, propyldimethoxysilyl group, methyldiethoxysilyl group, ethyldioxysilyl group. An ethoxysilyl group, a propyldiethoxysilyl group, etc. are mentioned.

  The main chain of the hydrolyzable silyl group-end-modified resin is not particularly limited, and examples thereof include polyester, polyether, polyolefin, polyurethane, polysiloxane, poly (meth) acrylate, polycarbonate, etc., preferably polyether, polyolefin, polyurethane , Polysiloxane and poly (meth) acrylate, more preferably polyether, and still more preferably polyether containing polyoxypropylene and / or polyoxyethylene.

  The hydrolyzable silyl group-terminated modified resin is produced by a hydrosilylation reaction method, a method in which an aminosilane or the like is reacted with a reaction product of a hydroxyl group-containing polyether and a polyisocyanate, a method in which a hydroxyl group-containing polyether and an isocyanate silane are reacted. be able to. Moreover, a commercial item can also be used as a hydrolysable silyl group terminal modified resin. Examples of commercially available hydrolyzable silyl group-end-modified resins include “Syryl” series manufactured by Kaneka Corporation and “Exester” series manufactured by Asahi Glass Co., Ltd.

  Examples of the curing catalyst used for the agent A include known silanol catalysts such as titanic acid esters, tin carboxylates, organotin compounds, organoaluminum compounds, amine compounds, acidic catalysts, and basic catalysts. These can be used alone or in combination of two or more.

  The blending amount of the curing catalyst is preferably 0.1 to 5 parts by mass, more preferably 0.2 to 2 parts by mass with respect to 100 parts by mass of the hydrolyzable silyl group terminal modified resin. If the blending amount of the curing catalyst is too small, the curing may not be sufficiently performed. Conversely, if the blending amount is too large, the storage stability and the adhesion to various substrates may be decreased.

  Examples of the aqueous dispersion constituting the agent B include emulsions of synthetic resins or oligomers, asphalt emulsions, silane emulsions, self-emulsifying emulsions, re-emulsifying emulsions, slurries and suspensions. The obtained synthetic resin emulsion and asphalt emulsion are preferable from the viewpoints of stability and economy. Moreover, a water-soluble polymer solution, an alkali silicate, etc. can be used together as needed.

  Synthetic resin emulsions include styrene butadiene styrene block copolymer emulsion, styrene butadiene copolymer emulsion, acrylonitrile butadiene copolymer emulsion, acrylic resin emulsion, polychloroprene emulsion, vinylpyridine copolymer emulsion, polyisoprene emulsion, polybutadiene. Emulsions, vinyl chloride emulsions, vinylidene chloride emulsions, wax emulsions, urethane resin emulsions, vinyl acetate emulsions, ethylene / vinyl acetate copolymer (EVA) emulsions, etc., preferably acrylic resin emulsions, It is a styrene butadiene copolymer emulsion. These can be used alone or in combination of two or more.

  Examples of emulsifiers used in the production of the aqueous dispersion include fatty acid soap, rosin acid soap, alkyl sulfonate, dialkyl aryl sulfonate, alkyl sulfo succinate, polyoxyethylene alkyl sulfate and polyoxyethylene alkyl aryl sulfate. Anionic emulsifiers such as can be used. If necessary, known anionic emulsifiers such as nonionic emulsifiers such as polyoxyethylene alkyl ether, polyoxyethylene alkyl aryl ether and polyoxyethylene oxypropylene block copolymer can be used. In addition, reactive surfactants in which an ethylenic double bond is introduced into the chemical structural formula of a surfactant having a hydrophilic group and a lipophilic group can be used. Further, amphoteric emulsifiers such as betaine type and polyvinyl alcohol A protective colloid emulsifier of a water-soluble polymer can be used as necessary.

The solid content of the synthetic resin emulsion and the asphalt emulsion is preferably in the range of 15 to 90% by mass, more preferably 30 to 85% by mass. If the solid content is too high, dispersion may be difficult. Conversely, if the solid content is too low, the emulsion itself may have low stability and may not be uniformly mixed. A particularly preferable synthetic resin emulsion is an acrylic resin emulsion having a solid content of 40 to 60% by mass. Examples of commercially available acrylic resin emulsions include “Polysol” AE series manufactured by Showa Denko KK
In addition, solid content of an emulsion can be measured with the measuring method of the heating residue of JISK5601-1-2.

  A silane emulsion refers to an emulsion containing alkylalkoxysilane and alkylalkoxysiloxane as active ingredients. The amount of the active ingredient in the silane emulsion is preferably 15 to 90% by mass, more preferably 30 to 85% by mass. Silane emulsions are commercially available, and commercially available products can be used. Examples of commercially available silane emulsions include Aqua Seal 55E manufactured by Daido Paint Co., Ltd., SLIBLOCK WMS manufactured by Momentive Performance Materials LLC.

  The amount of the B agent is preferably 0.1 to 30 parts by mass, more preferably 0.5 to 20 parts by mass, and further preferably 1 to 10 parts by mass with respect to 100 parts by mass of the A agent. If the amount of B agent is too small, it may not be cured. Conversely, if the amount of B agent is too large, the workability in summer may be hindered.

  It is preferable that A agent contains a filler, a plasticizer, and a tackifier further.

  As fillers, heavy calcium carbonate, surface-treated calcium carbonate, magnesium carbonate, calcium oxide, hydrous silicic acid, fine powder silica, calcium silicate, kaolin, clay, talc, carbon black, titanium oxide, zinc oxide, colloidal silica Etc. can be used. These may be used alone or in combination of two or more.

  The blending amount of the filler is preferably 50 to 400 parts by mass, more preferably 150 to 200 parts by mass with respect to 100 parts by mass of the hydrolyzable silyl group terminal modified resin. If the amount of the filler is too small, the cost may be disadvantageous. Conversely, if the amount of the filler is too large, mixing may be difficult and workability may be deteriorated.

  In addition, asphalt can be mix | blended as a filler for the purpose of improving adhesiveness with asphalt roofing. As the asphalt, straight asphalt, blown asphalt, semi-blown asphalt, and solvent deasphalted asphalt can be used. These are used alone or in combination of two or more. That is, for example, straight asphalt specified in JIS K 2207 can be used, but among them, use of 150 to 200 having a high penetration is preferable, and use of 180 to 200 is more preferable. Those with low penetration are poorly dispersible in hydrolyzable silyl end-modified resins and require more plasticizers or dispersion stabilizers to improve dispersibility, reducing the physical properties of the cured coating. In addition, a bleed material is generated at the adhesion interface to the adherend.

  As a blending amount of asphalt, a preferable upper limit in the filler is 30%. The preferred lower limit is not particularly limited, but if it is very small, there is a possibility that the effect of improving adhesion to asphalt roofing by adding asphalt cannot be obtained. When the amount of asphalt is too large, the viscosity is remarkably increased and the asphalt tends to aggregate and is not stable as a product.

  As the plasticizer, phthalic acid esters such as dioctyl phthalate (DOP), polyalkylene glycols such as polyethylene glycol and polypropylene glycol, glycol esters, soybean oil esters, soybean oil methyl esters and the like can be used. These can be used alone or in combination of two or more.

  The compounding amount of the plasticizer is preferably 10 to 200 parts by mass, more preferably 15 to 100 parts by mass with respect to 100 parts by mass of the hydrolyzable silyl group terminal modified resin. If the blending amount of the plasticizer is too small, workability may be reduced. Conversely, if the blending amount of the plasticizer is too large, the surface of the adherend may be remarkably softened and the adhesive force may be decreased. .

  As the adhesion-imparting agent, known silane coupling agents can be used, among which aminosilane is preferable. Specific examples of aminosilane include N- (2-aminoethyl) -3-aminopropyltrimethoxysilane. N- (2-aminoethyl) -3-aminopropyltrimethoxysilane can be obtained from Momentive Performance Materials under the trade name Aminosilane A-1120. In addition, tackifiers such as petroleum resin-based, rosin-based, and terpene resin-based materials can also be used as the adhesion imparting agent.

Depending on the application, the A agent may be a coloring pigment, anti-sagging agent, ultraviolet absorber, antioxidant, dehydrating agent, anti-aging agent, metal deactivator, ozone degradation inhibitor, light stabilizer, etc. You may add a seed | species or 2 or more types.
In addition, the addition amount of these arbitrary components can be normally used in the range which does not prevent the effect of this invention.
A known dehydrating agent can be used as the dehydrating agent, but a low molecular weight silane compound is preferred. Specific examples of the low molecular weight silane compound include vinyltrimethoxysilane. Vinyltrimethoxysilane can be obtained from, for example, Momentive Performance Materials under the trade name of vinylsilane A-171.

  The preparation method of the agent A is not particularly limited. For example, a hydrolyzable silyl group terminal-modified resin is used in a kettle equipped with a closed processing kettle equipped with a stirrer, a condenser, a heating device, a vacuum dehydration device, and a nitrogen gas flow device. , Charged with other compounding agents, homogeneously mixed under nitrogen reflux using a nitrogen airflow device, dehydrated by heating under reduced pressure until the water content was 400 ppm or less, then cooled to 50 ° C. or less, such as silane coupling agent The agent A can be obtained by adding an adhesion-imparting agent, a dehydrating agent and a curing catalyst and mixing them uniformly.

Next, the waterproof structure and waterproofing method of the present invention will be described.
The waterproof structure of the present invention is a waterproof structure formed by laminating a reinforcing cloth or a roofing sheet, and is characterized by being laminated using the two-component reaction curable resin composition.
The waterproof construction method of the present invention comprises a curable resin composition prepared by in-situ mixing an agent A containing a hydrolyzable silyl group terminal modified resin and a curing catalyst and an agent B comprising an aqueous dispersion, and the prepared curable resin It includes applying the composition to the construction surface, applying the curable resin composition, and pasting the roofing sheet while uncured. For mixing the A agent and the B agent, it is preferable to use a commercially available electric stirrer. The curable resin composition obtained by mixing is preferably applied within 30 minutes after mixing. Since it can be handled at room temperature, various tools can be used for application, such as brushes, trowels, handle rods, rollers, etc., tools used in conventional thermal asphalt waterproofing methods, and tools used in painting. be able to.

FIG. 1 is a cross-sectional view of one example of a waterproof structure. In FIG. 1, 1 is a concrete base, and the adhesive layer 2 is formed on the construction surface of the concrete base 1 by applying the two-component reaction curable resin composition. Reference numeral 3 denotes a roofing sheet, and the roofing sheet 3 is sequentially attached before the adhesive layer 2 is cured.
The adhesive layer 2 is formed on the construction surface of the concrete substrate 1 after the latency and efflorescence are removed or dried by cleaning or high-pressure water washing. Note that a plurality of roofing sheets 3 are laminated via the adhesive layers 2 as shown in the figure. Note that the adhesive layer 2 on the concrete base 1 also functions as a base treatment layer. Moreover, a primer can also be used as needed.

  As the roofing sheet 3, a roofing sheet usually used in a roofing waterproofing method can be used. For example, a nonwoven fabric impregnated or coated with asphalt or the like can be used, but is not limited thereto. Further, a reinforcing cloth can be used instead of the roofing sheet 3. Examples of the reinforcing cloth include non-woven fabric, woven cloth or mesh made of synthetic fiber or glass fiber.

  As the roofing sheet 3, a roofing sheet having a spacer on the back surface (hereinafter also referred to as “a roofing sheet with a spacer”) can be used. Further, instead of the roofing sheet with a spacer, a reinforcing cloth having a spacer on the back surface can be used. FIG. 2 is a bottom view of one example of the roofing sheet 4 with a spacer, and FIG. 3 is a cross-sectional view thereof (a cross-sectional view taken along line AA in FIG. 2). The roofing sheet 4 with a spacer includes a sheet portion 5 and a spacer 6.

  FIG. 4 shows a construction example of a roofing waterproof structure using the roofing sheet 4 with a spacer. The two-component reaction curable resin composition is applied onto the concrete base 1 to form the adhesive layer 2, and the roofing sheet 4 with spacer is attached to the spacer 6 before the adhesive layer 2 is cured. When affixed with the surface facing the adhesive layer 2, the adhesive layer 2 becomes the thickness of the spacer 6. That is, by using the roofing sheet 4 having a spacer on the back surface, the thickness of the adhesive layer can be made uniform, and the coating film does not become thin even if it is put on immediately after construction. In other words, the coating amount of the two-component reaction curable resin composition can be controlled and managed.

  The sheet portion 5 of the roofing sheet 4 with the spacer may be the same as a normal roofing sheet having no spacer. The thickness of the sheet portion 5 can be appropriately selected according to the construction place and the construction purpose, but is preferably 0.5 to 5.0 mm, more preferably 1.0 to 2.5 mm, Preferably it is 1.2-1.6 mm. If the thickness of the sheet portion 5 is too small, the long-term durability of the waterproof layer may be reduced or the waterproof layer may be broken. Conversely, if the thickness of the sheet portion 5 is too large, the waterproof layer may be deteriorated. is there.

Examples of the material constituting the spacer 6 include a vinyl chloride resin, an acrylic resin, a modified silicone resin, an epoxy resin, and a phenol resin, and among them, a modified silicone resin is preferable. The height of the spacer 6 can be selected according to the target coating amount, but is preferably 0.1 to 1.5 mm, more preferably 0.3 to 1.0 mm, and still more preferably 0.3 to 0.6 mm. If the height of the spacer 6 is too small, the coating amount of the coating material is reduced, and there is a possibility that the minimum film thickness for waterproofing performance cannot be ensured. It tends to be a large amount, which may be disadvantageous from the viewpoints of reduction in construction efficiency and economy. The shape of the spacer 6 is not particularly limited, and may be any of a circle, an ellipse, a square, a rectangle, a diamond, a triangle, a hexagon, and other polygons, but is preferably a circle. The area of one spacer is preferably ² to 700 mm ² , more preferably ² to 350 mm ² , and further preferably 5 to 100 mm ² . If the area of one spacer is too small, the roofing may be penetrated. Conversely, if the area of one spacer is too large, the amount of the coating material may be reduced. The ratio of the area occupied by the spacer to the entire area of the sheet portion (hereinafter also referred to as “spacer occupation ratio”) is preferably 2 to 50%, more preferably 3 to 40%, and still more preferably 5 ~ 30%. If the spacer occupancy is too small, there is a possibility that a certain thickness of the coating material cannot be secured when riding on the roofing. Conversely, if the spacer occupancy is too large, there is a risk that the coating material is small and waterproof performance cannot be obtained. .

In the waterproof structure of FIG. 1, the adhesive layer 2 is formed directly on the concrete base 1, but a primer layer is formed on the concrete base, and an adhesive layer is formed on the primer layer. May be.
Further, a protective concrete layer may be further formed on the uppermost adhesive layer 2 of the waterproof structure in FIG. 1 to protect the waterproof layer.
Further, a heat insulating material layer made of urethane foam or polystyrene foam may be further fixed on the uppermost adhesive layer 2 of the waterproof structure of FIG. 1, and a protective concrete layer may be further formed thereon.
Further, an exposed waterproof layer may be formed by further attaching a sanding roofing sheet on the uppermost adhesive layer 2 of the waterproof structure of FIG. The sanding roofing sheet used for sticking can be used with a spacer if necessary.
In the waterproof structure of FIG. 1, a roofing sheet 3 is affixed on a concrete base 1 via an adhesive layer 2, but is made of urethane foam or polystyrene foam on the concrete base via an adhesive layer. A heat insulating material layer may be fixed, and a roofing sheet may be stuck on the heat insulating material layer via an adhesive layer.

  The two-component reaction curable resin composition of the present invention can also be used in a so-called modified waterproof structure in which a new waterproof layer is formed on an existing waterproof layer. For example, when an existing waterproof layer is formed by a sanding roofing sheet on a concrete base, the base treatment layer is formed on the existing waterproof layer by applying the two-component reaction curable resin composition of the present invention. Further, a roofing sheet with an adhesive layer may be fixed thereon to form a new repair waterproof layer. Adhesive layer roofing sheet has a pressure-sensitive adhesive layer on the back side, and the adhesive layer and adhesive layer are pressed if the adhesive layer is pressed after the adhesive layer is completely cured. Close contact. Since the roofing sheet can be laid after the adhesive layer is completely cured, good construction efficiency and construction accuracy can be realized.

The two-component reaction curable resin composition of the present invention can also be used in a sealing part used for water stopping purposes in a roofing terminal. When there is surface sand on the lower roofing surface of the laminated portion in the waterproof layer laminated portion such as the self-adhesion method, a sealing portion is formed in advance by applying the two-component reaction curable resin composition of the present invention, thereby If the pressure-sensitive adhesive layer of the roofing sheet with the pressure-sensitive adhesive layer is pressed here after the sealing portion has hardened by covering the sand surface, the pressure-sensitive adhesive layer and the sealing portion are brought into close contact with each other. In this case, the adhesion and water tightness can be further enhanced by a method in which a roofing sheet with an adhesive layer is attached before curing.
In addition, when a waterproof layer-laminated part such as a self-adhesive method is formed on the lower roofing surface of the laminated part, a layer that can be easily adhered to the adhesive layer such as a film layer instead of surface sand is used. After forming a waterproof layer by laminating sheets, a sealing portion may be formed on the end of the waterproof layer with the two-component reaction curable resin composition of the present invention. The sealing part can be applied and formed in a stick shape on the laminated part of the roofing sheet in a bar shape of about 100 to 150 g / m so as to improve the water tightness.

The adhesive layer 2 is formed by preferably applying about 1.0 to 1.5 kg / m ² of the two-component reaction curable resin composition of the present invention. In addition, even if the existing waterproof layer has been aged for several to 20 years, the two-component reaction curable resin composition of the present invention functions properly as an adhesive layer and a base treatment layer, so that a new waterproof layer is provided thereon. The layer can be built firmly.

Since the two-component reaction curable resin composition of the present invention is polymerized by mixing moisture into the system by combining the moisture curable resin composition and the aqueous dispersion, it cures quickly at room temperature, Reliable curing can be obtained regardless of environmental humidity.
Unlike rigorous two-component mixing and stirring such as urethane, polymerizing is performed by mixing water into the system, so that uncured generation due to poor stirring hardly occurs.
A modified asphalt coating can be obtained by making the aqueous dispersion asphalt emulsion, and a non-asphalt coating can be obtained by making the aqueous dispersion a synthetic resin emulsion. Can be obtained.

Comparative Example 1
100 parts by mass of hydrolyzable silyl group-terminated modified resin ("Silyl" (registered trademark) EST280, manufactured by Kaneka Corporation), bis [3- (3-tert-butyl-4-hydroxy-5-methylphenyl) as an antioxidant Propionic acid] [ethylenebis (oxyethylene)] ("IRGANOX" (registered trademark) 245) manufactured by BASF Japan Ltd., and 20 parts by mass of surface-treated calcium carbonate (Calfine 200M manufactured by Maruo Calcium Co., Ltd.) as a filler And 180 parts by weight of heavy calcium carbonate (BF100, manufactured by Shiraishi Calcium Co., Ltd.) and 100 parts by weight of polypropylene glycol (PPG3000, manufactured by Sanyo Chemical Industries, Ltd.) as a plasticizer are mixed, and dehydration is performed under reduced pressure until the water content reaches 400 ppm. After cooling to 50 ° C. or less, 5 parts by weight of vinyltrimethoxysilane (vinyl silane A-171 manufactured by Momentive Performance Materials Japan GK), N- (2-aminoethyl) -3-aminopropyltrimethoxysilane (momentive Performance Materials Japan GK Co., Ltd. Aminosilane A-1120) 5 parts by mass, dibutyltin (Nitto Kasei Co., Ltd. organic tin catalyst "Neostan" U-220H) 1.5 parts by mass as a curing catalyst Were mixed to obtain agent A (1).

Comparative Example 2
The same procedure as in Comparative Example 1 was carried out except that 1.5 parts by mass of the catalyst was increased to 3 parts by mass in Comparative Example 1, and Agent A (2) was obtained.

Example 1
Surfactant in which straight asphalt 150-200 (manufactured by JX Nippon Oil & Energy Corporation) heated to 150 ° C. and 2% polyoxyethylene lauryl ether (Emalgen 109, manufactured by Kao Corporation) are dissolved in tap water in advance. The aqueous solution adjusted to 60 ° C. was passed through a Hallel homogenizer (Asahi homogenizer LL type manufactured by Kisho Co., Ltd.) at the same time so that the concentration of straight asphalt was 59% by mass to obtain an asphalt emulsion. 0.1 parts by weight of asphalt emulsion as part B was added to 100 parts by weight of agent A (1) prepared in Comparative Example 1, and an ultra-high speed multi-stirring system ("Robomix" (registered trademark) manufactured by Primix Co., Ltd.) was added. The resulting mixture was stirred at 1,000 rpm for 1 minute to obtain a curable resin composition.

Example 2
Except having changed the addition amount of the asphalt emulsion into 1 mass part, it implemented similarly to Example 1 and obtained the curable resin composition.

Example 3
Except having changed the addition amount of the asphalt emulsion into 5 mass parts, it implemented similarly to Example 1 and obtained the curable resin composition.

Example 4
Except having changed the addition amount of the asphalt emulsion into 10 mass parts, it implemented similarly to Example 1 and obtained the curable resin composition.

Example 5
A curable resin composition was obtained in the same manner as in Example 1 except that the amount of the asphalt emulsion added was changed to 30 parts by mass.

Example 6
To 100 parts by mass of agent A (1), 1 part by mass of an acrylic emulsion (AE-850 manufactured by Showa Denko Co., Ltd., solid content: 56% by mass) having a glass transition point of about −10 ° C. is added as agent B, and ultra-high speed multi-stirring is performed. Using a system ("Robomix" (registered trademark) manufactured by Primix Co., Ltd.), the mixture was stirred at 1,000 rpm for 1 minute to obtain a curable resin composition.

Example 7
To 100 parts by mass of agent A (1), 5 parts by mass of an acrylic emulsion (AE-850 manufactured by Showa Denko Co., Ltd., solid content: 56% by mass) having a glass transition point of about −10 ° C. is added as agent B, and ultra-high speed multi-stirring is performed. Using a system ("Robomix" (registered trademark) manufactured by Primix Co., Ltd.), the mixture was stirred at 1,000 rpm for 1 minute to obtain a curable resin composition.

Example 8
To 100 parts by mass of Agent A (1), 10 parts by mass of an acrylic emulsion (AE-850 manufactured by Showa Denko KK, solid content: 56% by mass) having a glass transition point of about −10 ° C. is added as Agent B, and ultra-high speed multi-stirring is performed. Using a system ("Robomix" (registered trademark) manufactured by Primix Co., Ltd.), the mixture was stirred at 1,000 rpm for 1 minute to obtain a curable resin composition.

Example 9
To 100 parts by mass of agent A (1), 1 part by mass of an acrylic emulsion (AE-815, Showa Denko KK, solid content 55% by mass) having a glass transition point of about −25 ° C. is added as agent B, and ultra-high speed multi-stirring is performed. Using a system ("Robomix" (registered trademark) manufactured by Primix Co., Ltd.), the mixture was stirred at 1,000 rpm for 1 minute to obtain a curable resin composition.

Example 10
To 100 parts by mass of agent A (1), 5 parts by mass of an acrylic emulsion (AE-815, Showa Denko Co., Ltd., solid content 55% by mass) having a glass transition point of about −25 ° C. is added as agent B, and ultra-high speed multi-stirring is performed. Using a system ("Robomix" (registered trademark) manufactured by Primix Co., Ltd.), the mixture was stirred at 1,000 rpm for 1 minute to obtain a curable resin composition.

Example 11
To 100 parts by mass of agent A (1), 10 parts by mass of an acrylic emulsion (AE-815 manufactured by Showa Denko KK, solid content 55% by mass) having a glass transition point of about −25 ° C. is added as agent B, and ultra-high speed multi-stirring is performed. Using a system ("Robomix" (registered trademark) manufactured by Primix Co., Ltd.), the mixture was stirred at 1,000 rpm for 1 minute to obtain a curable resin composition.

Example 12
To 100 parts by mass of agent A (1), 1 part by mass of an acrylic emulsion (AE-5595 made by Showa Denko KK, solid content: 55% by mass) having a glass transition point of about −40 ° C. is added as agent B, and ultra-high speed multi-stirring is performed. Using a system ("Robomix" (registered trademark) manufactured by Primix Co., Ltd.), the mixture was stirred at 1,000 rpm for 1 minute to obtain a curable resin composition.

Example 13
To 100 parts by mass of agent A (1), 5 parts by mass of an acrylic emulsion (AE-5595, Showa Denko Co., Ltd., AE-5595, solid content 55% by mass) having a glass transition point of about −40 ° C. is added as agent B, and ultra-high speed multi-stirring is performed. Using a system ("Robomix" (registered trademark) manufactured by Primix Co., Ltd.), the mixture was stirred at 1,000 rpm for 1 minute to obtain a curable resin composition.

Example 14
To 100 parts by mass of agent A (1), 10 parts by mass of an acrylic emulsion (AE-5595, Showa Denko Co., Ltd., AE-5595, solid content 55% by mass) having a glass transition point of about −40 ° C. is added as agent B, and ultra-high speed multi-stirring is performed. The system (“Robomix” (registered trademark) manufactured by Primix Co., Ltd.) was stirred at 1,000 rpm for 1 minute to obtain a curable resin composition.

Example 15
1 part by weight of modified asphalt emulsion (Bill coat manufactured by Tajima Roofing Co., Ltd., solid content: 85% by weight) is added as an agent B to 100 parts by weight of Agent A (1). (Registered trademark)) and stirred at 1,000 rpm for 1 minute to obtain a curable resin composition.

Example 16
Addition of 1 part by mass of ethylene / vinyl acetate / acrylic copolymer emulsion (M-750F, Showa Denko KK, solid content 56% by mass, glass transition point −10 ° C.) as agent B to 100 parts by mass of agent A (1) The mixture was stirred at 1,000 rpm for 1 minute using an ultra-high speed multi-stirring system ("Robomix" (registered trademark) manufactured by PRIMIX Corporation) to obtain a curable resin composition.

Example 17
To 100 parts by mass of agent A (1), 1 part by mass of an ethylene / vinyl acetate copolymer emulsion (M-930, manufactured by Showa Denko KK, solid content 56 mass%, glass transition point 10 ° C.) is added as an agent B. The mixture was stirred at 1,000 rpm for 1 minute using a high-speed multi-stirring system ("Robomix" (registered trademark) manufactured by PRIMIX Corporation) to obtain a curable resin composition.

Example 18
1 part by weight of polyester / styrene / acrylic resin emulsion (FP-3000A manufactured by Showa Denko KK, solid content: 54% by weight, glass transition point: 40 ° C.) as part B is added to 100 parts by weight of agent A (1). The mixture was stirred at 1,000 rpm for 1 minute using a high-speed multi-stirring system ("Robomix" (registered trademark) manufactured by PRIMIX Corporation) to obtain a curable resin composition.

Example 19
Addition of 1 part by mass of acrylic emulsion (X-213-390E-6, made by Seiden Chemical Co., Ltd., solid content: 47% by mass, glass transition point: 106 ° C.) as agent B to 100 parts by mass of agent A (1) Using a multi-stirring system ("Robomix" (registered trademark) manufactured by PRIMIX Corporation), stirring was performed at 1,000 rpm for 1 minute to obtain a curable resin composition.

Example 20
1 part by mass of silane emulsion (Aqua Seal 55E manufactured by Daido Paint Co., Ltd., 50% by mass of active ingredient) is added as B agent to 100 parts by mass of Agent A (1), and an ultra-high speed multi-stirring system ("ROBO" manufactured by PRIMIX Corporation) Mix ”(registered trademark)) was stirred at 1,000 rpm for 1 minute to obtain a curable resin composition.

Example 21
Add 1 part by weight of silane emulsion (SLIBLOCK WMS, 40% by mass of active ingredient, manufactured by Momentive Performance Materials Godo Kaisha) as part B to 100 parts by weight of agent A (1), ultra-high speed multi-stirring system (Primics Co., Ltd.) Using “Robomix” (registered trademark)), the mixture was stirred at 1,000 rpm for 1 minute to obtain a curable resin composition.

  About the curable resin composition obtained in the Example, dispersibility, sclerosis | hardenability, and adhesiveness were evaluated. The compositions obtained in the comparative examples were evaluated for curability and adhesiveness. The evaluation results are shown in Tables 1 and 2. In addition, the evaluation method of each evaluation item is as follows.

[Dispersibility]
When each emulsion was added, it was evaluated whether it could be dispersed without separation, aggregation, and the like.

[Curing property]
The composition was applied to an aluminum plate base of 180 mm × 170 mm × thickness 1 mm so as to have a thickness of 1 mm, and a fine sheet (made by Tajima Roofing Co., Ltd.) was attached as a modified asphalt roofing, followed by a predetermined temperature. After a predetermined time (24 hours at 5 ° C., 72 hours at 5 ° C., 3 hours at 23 ° C., and 24 hours at 23 ° C.), the curing state of the composition inside the roofing was evaluated. The case where it hardened | cured was shown by (triangle | delta), the case of semi-hardened (triangle | delta), and the case of uncured by x.

[Adhesiveness]
The composition is applied to a 130 mm x 170 mm x 1 mm thick aluminum plate base to a thickness of 1 mm, and a 100 mm x 100 mm fine sheet (made by Tajima Roofing Co., Ltd.) is pasted as modified asphalt roofing. After that, it is cut into a width of 25 mm after a predetermined time at a predetermined temperature (24 hours at 5 ° C., 72 hours at 5 ° C., and 24 hours at 23 ° C.), and the adhesiveness of the composition by 180 ° peel Evaluated. A case where the composition or the roofing material was broken was indicated by ◯, a case where the interface was broken was indicated by Δ, and a case where the strength could not be measured was indicated by ×.

  The two-component reaction curable resin composition of the present invention can be suitably used in a roofing waterproofing method.

DESCRIPTION OF SYMBOLS 1 Concrete base 2 Adhesive layer 3 Roofing sheet 4 Roofing sheet with a spacer 5 Sheet part 6 Spacer

Claims (11)

A waterproof structure in which a roofing sheet is laminated on an installation surface or on a roofing sheet via an adhesive layer , wherein the adhesive layer includes a hydrolyzable silyl group terminal modified resin and a curing catalyst. A waterproof structure comprising a cured product of a two-component reaction curable resin composition comprising an agent and a B agent comprising an aqueous dispersion.   The waterproof structure according to claim 1, wherein the amount of the B agent is 0.1 to 30 parts by mass with respect to 100 parts by mass of the A agent.   Aqueous dispersion is styrene butadiene styrene block copolymer emulsion, styrene butadiene copolymer emulsion, acrylonitrile butadiene copolymer emulsion, acrylic resin emulsion, polychloroprene emulsion, vinyl pyridine copolymer emulsion, polyisoprene emulsion, polybutadiene emulsion. , Vinyl chloride emulsion, vinylidene chloride emulsion, wax emulsion, urethane resin emulsion, vinyl acetate emulsion, and at least one emulsion selected from the group consisting of ethylene / vinyl acetate copolymer (EVA) emulsion The waterproof structure according to claim 1 or 2.   The waterproof structure according to claim 1 or 2, wherein the aqueous dispersion is an asphalt emulsion.   The waterproof structure according to claim 1 or 2, wherein the aqueous dispersion is a silane emulsion.   The waterproof structure according to claim 3 or 4, wherein the solid content of the emulsion is 30 to 85 mass%.   The waterproof structure according to claim 5, wherein the amount of the active ingredient in the silane emulsion is 15 to 90% by mass.   The waterproofing structure according to any one of claims 1 to 7, wherein the agent A further contains a filler, a plasticizer, and an adhesion-imparting agent.   The waterproof structure according to any one of claims 1 to 8, wherein the roofing sheet has a spacer on the back surface. A hydrolyzable silyl group-terminated modified resin and an agent A containing a curing catalyst and an agent B consisting of an aqueous dispersion are mixed in-situ to prepare a curable resin composition, and the prepared curable resin composition is applied to the construction surface or A waterproofing method that involves applying onto a roofing sheet and pasting the roofing sheet while it is uncured.   The waterproofing method according to claim 10, wherein the roofing sheet has a spacer on the back surface.

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