JP2009029972A - One component curable resin composition and asphalt roofing waterproof structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a solventless and one component curable resin composition ensuring safety owing to be handled at ordinary temperature, preventing obstructions in the installation environment such as smoke and odors, while improving adhesiveness to primers and roofings used in asphalt waterproof processes, giving no problem caused by bubbling of roofing surfaces by solvents, and the like and having good adhesiveness to the asphalt-based adhesives after curing in the asphalt-based waterproof processes, and also provide a waterproof structure using thereof. <P>SOLUTION: The one component curable resin composition comprising a reactive silicon group-containing organic polymer, a silanol condensation catalyst, an aqueous dispersion for improving adhesive strength at an adhesion interface, a plasticizer and a filler is provided. An asphalt roofing waterproof structure prepared by forming an adhesive agent layer comprising the one component curable resin composition, a sealing portion and a ground treatment layer in constructing the waterproof structure applied with an asphalt roofing material is also provided. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a one-part curable resin composition excellent in curability and adhesiveness as an adhesive, sealing material, and base treatment material used in an asphalt waterproofing method, and a waterproof structure using the same.

  The so-called asphalt waterproofing thermal method, in which asphalt is melted at the construction site and the asphalt flows on the waterproof surface, a plurality of asphalt roofing layers are stacked to form a waterproof layer, is still a waterproof method in terms of its waterproof reliability. Occupies the mainstream. The most excellent point of this construction method is that the asphalt has a low viscosity and excellent fluidity at the time of construction, so a high watertightness can be obtained. It is in the point to be obtained.

  The above-mentioned asphalt waterproofing thermal construction method is extremely excellent in waterproofing effect. However, in this construction method, usually 200-400 kg of asphalt for waterproofing construction is put in a melting pot capable of melting, and a heating source such as a propane burner is used. It is a construction method in which blown asphalt for waterproofing work is melted at 250 to 300 ° C., and then the asphalt melted by the operator is transferred to a small can that can be carried, and asphalt roofing is attached while flowing with a handle to form a waterproof layer.

In this construction method, the asphalt melting work, which normally requires 3 to 6 kg / m ^2, must be performed almost all day. And the reason for making it melt | dissolve at the temperature of 250-300 degreeC is because the fluidity | liquidity of asphalt is scarce at the temperature below it, and it will interfere with waterproof construction work.
However, various problems have been pointed out, such as the smoke and odor generated when melting asphalt makes the local residents uncomfortable, and the risk of ignition of the asphalt and burns of workers during handling. Has been.

  On the other hand, there are waterproofing methods that form a waterproof layer by applying a liquid material that reacts and cures with two components, such as urethane film waterproofing materials, and roofing methods that use adhesive cut back with a solvent. However, in the two-component reaction curing, measurement mistakes and poor mixing are likely to occur, and in both cases, when the reaction is completed, or when the solvent is volatilized, the designed waterproof performance is manifested for the first time, Immediately after construction, complete waterproof performance is not obtained. In addition, it is difficult to avoid inconveniences such as a solvent contained in the liquid material softening the roofing after construction or foaming the surface.

  In addition, several asphalt cooling methods have been proposed as countermeasures to solve the above problems. As one of the cooling methods, there is a so-called self-adhesion method in which construction is performed using a roofing having an adhesive layer, which is well established in the market. However, even in this self-adhesion method, in the actual construction site, there are cases where the watertightness of the roofing terminal is not sufficient with only the adhesive layer, and therefore a sealing material and an adhesive are used in combination with the overlapping part of the roofing It is common.

The sealing material and adhesive used in the self-adhesion method have sufficient adhesive strength for asphalt-based adhesives when the adhesive surface is dissolved due to the solvent used to ensure workability or when it is applied after curing. May not be obtained, or the roofing surface may be foamed with a solvent or the like inherent after the application.

  In addition to the self-adhesion method, the following method has been proposed as an asphalt type cooling method. That is, it is a waterproofing method in which asphalt roofing is applied using a modified asphalt emulsion in which modified asphalt is dispersed in water and an emulsion curing agent as an adhesive. According to this construction method, there is no need to apply heat, and asphalt smoke, odor generation and roofing are not softened, but problems such as measurement errors and poor mixing in two-component reaction curing are solved. Not. In addition, in order to bond asphalt roofing to the ground with sufficient adhesive force, it takes time until the moisture of the modified asphalt emulsion disappears, and there is a roofing swelling phenomenon due to the influence of moisture present after reaction hardening .

  In addition, the use of a modified silicone-based sealing and an adhesive is conceivable, but in the method using such an adhesive, since there is no need to use a solvent, there is an advantage that the problem of volume shrinkage does not occur. Adhesive strength to the asphalt waterproofing layer terminal, asphalt roofing joint, and the primer surface made of blown asphalt cannot be obtained. Therefore, it is necessary to improve the adhesive strength, and there is a problem in practical use. In addition, even if a so-called self-adhesive roofing having an asphalt-based adhesive material on the back surface is pasted on the hardened surface after taking open time, there is a problem that sufficient adhesive strength cannot be obtained, and it will be easily peeled off. On rooftops exposed to slabs, the inherent plasticizer gradually bleeds, which not only reduces the adhesive strength by softening the asphalt-based adhesive layer, but also peels off the asphalt-based adhesive layer by bleeding the plasticizer at the interface. Such inconvenience occurs.

Further, in waterproofing work, a base treatment material is applied to the surface of an existing waterproof layer or a concrete base surface to ensure the adhesion of a waterproof layer in which the base is smooth and newly provided.
Examples of such a surface treatment material include a liquid material obtained by cutting back asphalt with a solvent, a modified asphalt emulsion, and the like, and as described above, it takes a very long time to evaporate the solvent and moisture in the liquid material. The problem is that the roofing is affected by the point and the residual solvent and moisture, leading to blistering and foaming of the roofing surface.

The following documents exist in relation to the present application.
Special table 2001-502753 JP 2006-45313 A JP 11-148202 A Japanese Patent Application Laid-Open No. 08-90705 Japanese Patent Application No. 58-166749 Japanese Patent Application No.11-309615 Japanese Patent Application No. 7-70792

  The invention of the present application can ensure safety because it can be handled at room temperature in the asphalt waterproofing method, and also prevents adhesion of the construction environment due to smoke, odor, etc., while improving adhesion to primers and roofing used in the asphalt waterproofing method. An object of the present invention is to provide a solventless one-part curable resin composition having no problem of foaming of the roofing surface due to a solvent and the like and having good adhesion to an asphalt-based pressure-sensitive adhesive material even after curing, and a waterproof structure thereby.

  The present invention includes a reactive silicon group-containing organic polymer (A), a silanol condensation catalyst (B), an aqueous dispersion (E) for improving adhesive strength at an adhesive interface, a plasticizer (C), a filler (D ) And provides a one-part curable resin composition that can function as an adhesive, a sealing agent, and a base treatment material in an asphalt waterproofing work. In other words, when producing a one-component curable resin composition with a stirrer, an aqueous dispersion having a specific composition and properties is added to a reactive silicon group-containing organic polymer, and heat dehydration is performed to asphalt waterproofing. The adhesion to the primer, roofing, etc. used is improved, and the adhesion to the self-attaching roofing having an asphalt pressure-sensitive adhesive material on the back surface is improved even after curing.

In the one-component curable resin composition, the aqueous dispersion (E) is composed of particles made of a synthetic resin emulsion, and the particles made of the synthetic resin emulsion are 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 emulsion, vinyl chloride emulsion, vinylidene chloride emulsion, wax emulsion, urethane resin Resin particles, selected from resin emulsions, vinyl acetate emulsions, and ethylene / vinyl acetate copolymer (EVA) emulsions, or a combination of two or more May be configured.

Furthermore, in the above one-part curable resin composition, the blending amount of the silanol condensation catalyst (B) is 0.1 to 5 parts by weight with respect to 100 parts by weight of the reactive silicon group-containing organic polymer (A). The amount of particles (E) comprising the synthetic resin emulsion as a dispersion is 5 to 50 parts by weight (dry weight), and the total amount of the reactive silicon group-containing organic polymer (A) and the synthetic resin emulsion (E) is 100 weights. The amount of the plasticizer (C) is 10 to 200 parts by weight and the amount of the filler (D) is 50 to 400 parts by weight.

Furthermore, in the above one-part curable resin composition, the particles (E) made of the synthetic resin emulsion may be composed of a styrene butadiene copolymer having a glass transition point of 10 to -50 ° C.

Further, in any one of the above one-component curable resin compositions, the filler (D) may contain asphalt.

The present invention also provides an asphalt roofing waterproof structure in which asphalt roofing is formed by laminating asphalt roofing on an installation surface via an adhesive layer, and the adhesive layer is formed of any one-part curable resin composition as described above. To solve the above-described conventional problems.

In the asphalt roofing waterproof structure, a sealing portion may be formed in the overlapping portion of the asphalt roofing, and the sealing portion may be formed of any one-part curable resin composition.

Further, in any one of the asphalt roofing waterproof structures, a base treatment layer may be formed on the construction surface, and the base treatment layer may be formed from any one of the one-component curable resin compositions.

With the above configuration, the present invention has the following effects.
1. In the asphalt waterproofing method, the solvent-free one-component curable resin composition according to the present invention is used as an adhesive, a sealing material, or a base treatment material, enabling construction work at room temperature, ensuring safety, and smoke. In addition, the construction environment can be appropriately prevented from being disturbed by odors.
2. In addition to the above advantages, adhesion to primer and roofing used in asphalt waterproofing methods has been improved, and it can be used as an adhesive, sealing material or surface treatment material, and there is no problem such as foaming of the roofing surface due to solvents, etc. Even after curing, the adhesiveness with the asphalt-based pressure-sensitive adhesive material is good, and therefore, an asphalt waterproof structure having a proper waterproof effect can be constructed with good workability.

  In the present invention, the reactive silicon group-containing organic polymer (A) is a polymer having a main chain substantially introduced with a reactive silicone functional group in a polymer such as polyether or acrylic. Such a polymer is usually produced by a hydrosilylation reaction method, a method of reacting an aminosilane or the like with a reaction product of a hydroxyl group-containing polyether and a polyisocyanate, a method of reacting a hydroxyl group-containing polyether and an isocyanate silane, or the like. The Specific examples thereof include “MS polymer” (manufactured by Kaneka Co., Ltd.) that is already industrially produced and generally called modified silicone.

  Moreover, a conventionally well-known silanol condensation catalyst can be used as a silanol condensation catalyst which is a component (B). Specific examples thereof 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 silanol condensation catalyst as the component (B) is preferably 0.1 to 5 parts by weight, more preferably 0.2 to 2 with respect to 100 parts by weight of the modified silicone resin as the component (A). Parts by weight. If it is less than 0.1 part, it is not sufficiently cured, and if it exceeds 5 parts, the heat resistance is inferior.

  Furthermore, as a plasticizer which is the said component (C), phthalic acid ester type | system | groups, such as a dioctyl phthalate (DOP), glycol ester type | system | group, soybean oil ester, soybean oil methyl ester, etc. can be used. These can be used alone or in combination of two or more.

  The compounding amount of the component plasticizer (C) is preferably 10 to 200 parts by weight with respect to 100 parts by weight of the total particles (E) composed of the reactive silicon group-containing organic polymer (A) and the synthetic resin emulsion. Is more preferably 15 to 100 parts by weight. When the amount is less than 10 parts, workability is deteriorated.

  Filler (D) is 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, oxidized Zinc, colloidal silica, etc. can be used. These may be used alone or in combination of two or more.

  And as a compounding quantity of the said filler (D), a compounding quantity is 50-400 weight part with respect to 100 weight part of total particles (E) which consist of a reactive silicon group containing organic polymer (A) and a synthetic resin emulsion. However, it is more preferably 150 to 200 parts by weight. When it is less than 50 parts, it is disadvantageous in terms of cost, and when it exceeds 400 parts, mixing is difficult and workability is deteriorated.

In addition, when water resistance is required, asphalt can be mix | blended as a filler. 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. Among them, use of 150-200 having a high penetration is preferable, and use of 180-200 is more preferable.

  Those with low penetration are poorly dispersible in the reactive silicon group-containing organic polymer (modified silicone resin) and require more plasticizers or dispersion stabilizers to improve dispersibility. The physical properties of the film are lowered, and bleeds are generated at the adhesion interface to the adherend.

  As a blending amount of asphalt, a more preferable upper limit is 30% in the filler (D). The preferred lower limit is not particularly limited, but if it is very small, water resistance due to asphalt addition may not be obtained. On the other hand, if it exceeds 50%, the viscosity is remarkably increased, and asphalt tends to aggregate, which is not stable as a product.

  Examples of the aqueous dispersion (E) include suspensions in which oils and fats of about 0.001 to 5 μm or synthetic resin are forcibly dispersed, thermoplastic resins obtained by forced emulsification, such as styrene butadiene styrene block copolymers, and the like. Although mentioned, the particle | grains which consist of a synthetic resin emulsion obtained by the emulsion polymerization or the emulsion dispersion | distribution process are advantageous on stability and economical efficiency.

  The particles made of synthetic resin emulsion include styrene butadiene styrene block copolymer emulsion, styrene butadiene copolymer emulsion, acrylonitrile butadiene copolymer emulsion, acrylic resin emulsion, polychloroprene emulsion, vinyl pyridine copolymer emulsion, polyisoprene. Resin particles obtained from emulsion, polybutadiene emulsion, vinyl chloride emulsion, vinylidene chloride emulsion, wax emulsion, urethane resin emulsion, vinyl acetate emulsion, ethylene / vinyl acetate copolymer (EVA) emulsion, etc. A styrene butadiene copolymer emulsion is preferred. These can be used alone or in combination of two or more.

  The styrene butadiene copolymer emulsion can be copolymerized with the following monomers as required. That is, examples of the copolymerizable monomer include a (meth) acrylic acid alkyl ester monomer, an ethylenically unsaturated carboxylic acid monomer, and a vinyl cyanide monomer. These can be used singly or in combination of two or more, but can be used in such a range that the total sum does not exceed 30% with respect to the styrene-butadiene copolymer component.

  As an emulsifier, for example, anionic emulsifiers such as fatty acid soap, rosin acid soap, alkyl sulfonate, dialkyl aryl sulfonate, alkyl sulfo succinate, polyoxyethylene alkyl sulfate and polyoxyethylene alkyl aryl sulfate are used. Can do. 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 structure of a surfactant having a hydrophilic group and a lipophilic group can be used. Further, amphoteric emulsifiers such as betaine type and polyvinyl alcohol can be used. A protective colloid emulsifier of a water-soluble polymer can be used as necessary.

  The styrene-butadiene copolymer emulsion preferably has a glass transition point in the range of 10 to -50 ° C, more preferably -10 to -50 ° C. If the glass transition point exceeds 10 ° C, the effect of imparting adhesion is difficult to be exhibited at an air temperature of 20 ° C or higher, and if it falls below -50 ° C, it may not be uniformly dispersed during the production process.

  As a compounding quantity of the said synthetic resin emulsion (E) which brings about an adhesive improvement effect, 5-30% is preferable with respect to 100 weight part of modified silicone resin (A). If it is less than 5%, the adhesion improving effect cannot be obtained, and if it exceeds 30%, the viscosity is remarkably increased, and the emulsion is easily aggregated and is not stable as a product.

  Although details of the mechanism of the adhesion improving action of the styrene-butadiene copolymer emulsion are not clear, the single substance has poor compatibility with the modified silicone resin and is difficult to disperse stably. In addition, a resin that completely dissolves in the modified silicone resin cannot provide an effect of improving adhesion. On the other hand, the styrene-butadiene copolymer, which is a water dispersion in advance, is finely dispersed in the modified silicone resin, so that it can be selectively applied to the asphalt waterproof layer terminal, asphalt primer coating surface, and the modified silicone resin layer interface. It is presumed to be adsorbed on the surface. In addition, a similar effect is obtained on the surface after moisture curing, and the plasticizer component added for improving workability is held inside the cured body, and has an asphalt-based adhesive material to suppress the bleeding phenomenon. Even when the self-attaching roofing is bonded, sufficient adhesion is imparted.

The one-part curable modified silicone resin composition according to the present invention further includes a coloring pigment, an anti-sagging agent, an ultraviolet absorber, an antioxidant, a dehydrating agent, an adhesion-imparting agent, an anti-aging agent, a metal, depending on the application. You may add 1 type (s) or 2 or more types, such as a deactivator, an ozone degradation inhibitor, and a light stabilizer.
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. Specifically, A-171 (made by Momentive Performance Materials) is mentioned. As the adhesion-imparting agent, known silane coupling agents can be used, among which aminosilane is preferable. Specifically, A-1120 (made by Momentive Performance Materials) is mentioned.

  In the production of the one-part curable resin composition according to the present invention, in Step 1, the modified silicone resin and the synthetic resin emulsion as the aqueous dispersion are uniformly mixed, and the water contained in the synthetic resin emulsion is heated and dehydrated. By doing so, the synthetic resin emulsion particles are finely dispersed in the modified silicone resin.

When the plasticizer (C) is charged at the same time in Step 1 and uniformly mixed,
A: The aqueous dispersion (synthetic resin emulsion) is compatible with the modified silicone resin via the plasticizer, and the adhesion imparting effect cannot be obtained.
(B) The modified silicone resin has a low viscosity, and the fine dispersion state of the synthetic resin emulsion particles cannot be formed, resulting in a decrease in adhesive strength.

Also, when charging the filler (D) at the same time,
C: While moisture in the synthetic resin emulsion is absorbed into the filler, the heat dehydration efficiency is significantly reduced.
D: The filler is agglomerated to form a lump, and a uniform kneading state cannot be obtained.

Furthermore, if the filler is only alphalt, the synthetic resin emulsion and asphalt aggregate, and not only a dispersion state in the modified silicone resin cannot be obtained, but the viscosity becomes extremely high and mixing is not preferable.

  The one-component curable resin composition can be produced by a conventionally known kneading method. For example, using a closed processing kettle equipped with a stirrer, condenser, heating device, vacuum dehydration device and nitrogen airflow device, (A) modified silicone resin and (E) synthetic resin emulsion are charged into the kettle, and a nitrogen airflow device is used. Then, the mixture is homogeneously mixed under nitrogen reflux, and after step 1 and dehydrating under reduced pressure until a predetermined amount of water is obtained, and after step 1, (D) a filler is introduced and homogeneous under nitrogen reflux using a nitrogen airflow device. Step 2 of mixing and dehydrating by heating under reduced pressure until a predetermined amount of water is obtained.

  After step 1 and step 2, (C) a plasticizer is added, and the mixture is homogeneously mixed under nitrogen reflux, followed by dehydration by heating under reduced pressure until a predetermined water content is reached.

  When blending asphalt in the filler, (A) modified silicone resin and (E) synthetic resin emulsion are charged, mixed homogeneously under nitrogen reflux using a nitrogen airflow device, and heated to a predetermined moisture content After Step 1 and Step 1 under reduced pressure dehydration, (D) Filler is charged, and using a nitrogen airflow device, homogeneous mixing is performed under nitrogen reflux, and Step 2 is performed under reduced pressure by heating to a predetermined moisture content. After that, (C) plasticizer, asphalt or asphalt previously cut back with a plasticizer, and in some cases, an additive containing water is added, and the mixture is homogeneously mixed under nitrogen reflux, followed by heating under reduced pressure until a predetermined water content is reached. .

When asphalt is charged and uniformly mixed before the filler is added, the synthetic resin emulsion and asphalt are aggregated, and a dispersion state in the modified silicone resin cannot be obtained.
Thereafter, (B) a modified silicone curing catalyst is finally blended and homogeneously mixed to obtain a one-part curable resin composition. And if this 1-component curable resin composition is accommodated in an airtight container, it will become a final product.

  The one-part curable resin composition according to the present invention is used as an adhesive, a sealing material, and a base treatment material in a waterproof structure by a waterproofing method using an asphalt roofing material, and has a waterproof structure with excellent construction efficiency and extremely high waterproof reliability. can do.

Hereinafter, examples of the one-part curable resin composition and the asphalt waterproof structure using the same will be sequentially described.
Example of one-part curable resin composition Example 1
The production of the one-part curable resin composition according to this example was performed according to the following steps.
Step 1: Synthetic resin emulsion (styrene butadiene copolymer) as an aqueous dispersion (E) with respect to 85 parts by weight of a modified silicone resin (Syryl AS120, manufactured by Kaneka Corporation) as a reactive silicon group-containing organic polymer (A) A blended emulsion, Nipol LX110, Tg = −47) 15 parts by weight (dry weight) was charged into a stirrer (planetary mixer) and uniformly mixed while heating and dehydrating until 110 ° C.
Step 2: Next, 180 parts by weight of calcium carbonate (BF300, manufactured by Bihoku Flour Industry Co., Ltd.) as a filler (D) is mixed, dehydrated by heating under reduced pressure until 110 ° C again, and plasticizer (C) (DIDP , Sunsocizer, manufactured by Shin Nippon Rika Co., Ltd.) and 20 parts by weight were added, followed by heating under reduced pressure to reduce the water content to 400 ppm or less. After cooling the mixture thus obtained to 50 ° C. or less, 2 parts by weight of a dehydrating agent (A-171, manufactured by Momentive Performance Materials Co., Ltd.), an adhesion promoter (A1120, Momentive Performance Materials) 2 parts by weight) and 1 part by weight of a curing catalyst (U-220H, manufactured by Nitto Kasei Co., Ltd.) as a silanol condensation catalyst (B) and mixed uniformly to form a one-component curable modified silicone resin composition ( Example 1) was obtained.

Example 2
A one-part curable resin composition according to Example 2 was produced by the following steps.
Step 1: 85 parts by weight of a modified silicone resin (Syryl AS120, manufactured by Kaneka Corporation) as a reactive silicon group-containing organic polymer (A), a synthetic resin emulsion (styrene butadiene copolymer emulsion) as an aqueous dispersion (E) , Nipol LX110, Tg = −47) 15 parts by weight (dry weight) was charged into a stirrer (planetary mixer) and uniformly mixed while heating and dehydrating.
Step 2: Next, 155 parts by weight of calcium carbonate (BF300, manufactured by Bihoku Flour Industry Co., Ltd.) as a filler (D) is mixed, dehydrated under heat and reduced to 110 ° C., and asphalt (Niseki 180-200) , Nippon Oil Corp.) 25 parts by weight plasticizer (C) (DIDP, Sunsocizer, Shin Nippon Rika Co., Ltd.) 20 parts by weight was added back, and the water content was dehydrated by heating The amount was 400 ppm. After cooling the resulting mixture to 50 ° C. or less, 2 parts by weight of a dehydrating agent (A-171, manufactured by Momentive Performance Materials Co., Ltd.), an adhesion promoter (A1120, manufactured by Momentive Performance Materials Co., Ltd.) 2 parts by weight and 1 part by weight of a curing catalyst as a silanol condensation catalyst (B) were added and mixed uniformly to obtain a one-part curable modified silicone resin composition (Example 2).

Example 3
A one-part curable resin composition according to Example 3 was produced by the following steps.
Step 1: Synthetic resin emulsion (acrylonitrile butadiene copolymer) as an aqueous dispersion (E) with respect to 85 parts by weight of a modified silicone resin (Siryl AS120, manufactured by Kaneka Corporation) as a reactive silicon group-containing organic polymer (A) A blended emulsion, LX531, Tg = -15 ° C., 15 parts by weight (dry weight) was charged into a stirrer (planetary mixer) and uniformly mixed while heating and dehydrating until 110 ° C.
Step 2: Next, 180 parts by weight of calcium carbonate (BF300, manufactured by Bihoku Flour Industry Co., Ltd.) as a filler (D) is mixed, dehydrated by heating under reduced pressure until 110 ° C again, and plasticizer (C) (DIDP , Sunsocizer, manufactured by Shin Nippon Rika Co., Ltd.) and 20 parts by weight were added, followed by heating under reduced pressure to reduce the water content to 400 ppm or less. After cooling the mixture thus obtained to 50 ° C. or less, 2 parts by weight of a dehydrating agent (A-171, manufactured by Momentive Performance Materials Co., Ltd.), an adhesion promoter (A1120, Momentive Performance Materials) 2 parts by weight) and 1 part by weight of a curing catalyst (U-220H, manufactured by Nitto Kasei Co., Ltd.) as a silanol condensation catalyst (B) and mixed uniformly to form a one-component curable modified silicone resin composition ( Example 3) was obtained.

Comparative Example 1
A one-part curable resin composition according to Comparative Example 1 was produced by the following steps.
Calcium carbonate (BF300, manufactured by Bihoku Flourishing Co., Ltd.) as a filler (D) with respect to 100 parts by weight of a modified silicone resin (Syryl AS120, manufactured by Kaneka Corporation) as a reactive silicon group-containing organic polymer (A) ) Was mixed with 180 parts by weight and uniformly mixed while dehydrating with heating to 110 ° C.
Next, 20 parts by weight of a plasticizer (C) (DIDP, Sunsocizer, manufactured by Shin Nippon Rika Co., Ltd.) was added, and dehydration was performed under reduced pressure under heating to make the water content 400 ppm or less. After cooling the mixture thus obtained to 50 ° C. or less, 2 parts by weight of a dehydrating agent (A-171, manufactured by Momentive Performance Materials Co., Ltd.), an adhesion promoter (A1120, Momentive Performance Materials) 2 parts by weight) and 1 part by weight of a curing catalyst (U-220H, manufactured by Nitto Kasei Co., Ltd.) as a silanol condensation catalyst (B) and mixed uniformly to form a one-component curable modified silicone resin composition ( Comparative Example 1) was obtained.

Comparative Example 2
A one-part curable resin composition according to Comparative Example 2 was produced by the following steps.
Calcium carbonate (BF300, manufactured by Bihoku Flourishing Co., Ltd.) as a filler (D) with respect to 100 parts by weight of a modified silicone resin (Syryl AS120, manufactured by Kaneka Corporation) as a reactive silicon group-containing organic polymer (A) 155 parts by weight, dehydrated under reduced pressure until heated to 110 ° C, and 25 parts by weight of asphalt (Nisseki 180-200, manufactured by Nippon Oil Corporation) plasticizer (C) (DIDP, Sunsocizer, Shin Nippon) (Rika Co., Ltd.) The product cut back at 20 parts by weight was added, followed by dehydration by heating under reduced pressure to obtain a water content of 400 ppm. After cooling the mixture thus obtained to 50 ° C. or less, 2 parts by weight of a dehydrating agent (A-171, manufactured by Momentive Performance Materials Co., Ltd.), an adhesion promoter (A1120, Momentive Performance Materials) 2 parts by weight) and 1 part by weight of a curing catalyst (U-220H, manufactured by Nitto Kasei Co., Ltd.) as a silanol condensation catalyst (B) and mixed uniformly to form a one-component curable modified silicone resin composition ( Comparative Example 2) was obtained.

Next, a performance test of the one-part curable resin composition according to each of the above Examples 1 to 3 was performed, and the results shown in Table 1 below were obtained. In the test, Comparative Examples 1 and 2 were used as control examples.

Next, an embodiment of the asphalt roofing waterproof structure will be described based on the drawings. FIG. 1 is a longitudinal sectional view showing a first embodiment of an asphalt roofing waterproof structure.
In the figure, 1 is a concrete substrate, 2 is an adhesive layer formed on the construction surface of the concrete substrate, and this adhesive layer 2 is one of the examples according to the one-component curable resin composition described above. Is formed by coating. Reference numeral 3 denotes an asphalt roofing material, and the asphalt roofing material 3 is sequentially attached before the adhesive layer 2 is cured.
The adhesive layer 2 is formed on the construction surface of the concrete base 1 after the latency and efflorescence are removed or dried by cleaning or high-pressure water washing. In addition, asphalt roofing 3 is laminated | stacked in multiple numbers via each adhesive bond layer 2, as shown in a figure. Note that the adhesive layer 2 on the concrete base 1 also functions as a base treatment layer.

  FIG. 2 is a longitudinal sectional view showing a second embodiment of the asphalt roofing waterproof structure. In the figure, 4 is an asphalt-based primer layer formed on the construction surface of the concrete substrate 1, and the other configurations are the same as in the first embodiment. That is, a plurality of asphalt roofing materials are laminated on the asphalt primer layer 4 to constitute a waterproof layer.

  FIG. 3 is a longitudinal sectional view showing a third embodiment of the asphalt roofing waterproof structure. In the figure, 9 is a protective concrete layer formed for protecting the waterproof layer, and the other configuration is the same as that of the first embodiment. That is, after the uppermost adhesive layer 2 is cured, the protective concrete can be directly placed.

  FIG. 4 is a longitudinal sectional view showing a fourth embodiment of the asphalt roofing waterproof structure. In the figure, 6 is a heat insulating material layer made of polystyrene foam or the like fixed to the cured adhesive layer 2 via the adhesive layer 2. When the adhesive layer 2 is used for the purpose of fixing the heat insulating layer on the waterproof layer, the adhesive layer 2 may be applied again to the entire surface of the waterproof layer, but can be applied with a certain interval. In addition, since the one-component curable resin composition constituting the adhesive layer 2 is solvent-free, it can be used without problems for polystyrene foam that is easily dissolved in a solvent.

  FIG. 5 is a longitudinal sectional view showing a fifth embodiment of the asphalt roofing waterproof structure. In the figure, 1 is a concrete base, and 2 is an adhesive layer applied and formed according to any of the above-described embodiments relating to the one-part curable resin composition described above. 3 is an asphalt roofing material affixed before the adhesive layer 2 is cured, and an asphalt roofing material 5 with sand is further adhered to the surface of the asphalt roofing material 3 via the adhesive layer 2 to form an exposed waterproof layer. Has been.

FIG. 6 is a longitudinal sectional view showing a sixth embodiment of the asphalt roofing waterproof structure. In the figure, 1 is a concrete base, 2 is an adhesive layer applied and formed by any of the embodiments relating to the one-part curable resin composition described above, and is applied to the construction surface of the concrete base 1.
Reference numeral 6 denotes a heat insulating material layer made of urethane foam, polystyrene foam, or the like fixed to the concrete base 1 through the adhesive layer 2. Asphalt roofing material 3 is affixed to the surface of this heat insulating material layer 6 via an adhesive layer 2, and further, asphalt roofing material 3 is affixed with sand asphalt roofing material 5 via an adhesive layer 2, so-called exposed heat insulation. A waterproof layer is formed.
In this embodiment, the adhesive layer 2 is directly formed on the construction surface of the concrete substrate 1, but the primer layer may be applied to the surface of the concrete substrate 1 to form the adhesive layer.

  FIG. 7 is a longitudinal sectional view showing a seventh embodiment of the asphalt roofing waterproof structure. This embodiment relates to a so-called repair waterproof structure in which a new waterproof layer is formed on an existing waterproof layer. In the figure, an existing waterproofing layer 7 made of sandy asphalt roofing material is formed on a concrete substrate 1, and on this existing waterproofing layer 7, any one of the above-described one-component curable resin compositions is applied. The asphalt roofing material 8 with the adhesive layer is fixed through the base treatment layer 2 formed by coating, whereby a new repair waterproof layer is formed. The adhesive layer-attached asphalt roofing material 8 has an adhesive layer formed on the back surface thereof, and the adhesive layer 2 can be adhered if the adhesive layer of the asphalt roofing material 8 with the adhesive layer is pressed after the adhesive layer 2 is completely cured. The agent layer and the adhesive layer are in close contact. Since the roofing material can be laid after the adhesive layer is completely cured, good construction efficiency and construction accuracy can be realized.

  FIG. 8 is a longitudinal sectional view showing an eighth embodiment of the asphalt roofing waterproof structure. This embodiment is an embodiment relating to a sealing unit used for water stoppage in a roofing terminal. In the figure, when there is surface sand on the lower roofing surface of the laminated portion in the waterproof layer laminated portion such as the self-adhesive method, sealing is performed by previously applying one-part curable resin composition according to any of the above-described embodiments. The layer 10 (sealing part) is formed, thereby covering the sand surface and making it smooth. If the pressure-sensitive adhesive layer of the asphalt roofing material 8 with the pressure-sensitive adhesive layer is pressed here after the sealing layer 10 (part) is cured, the pressure-sensitive adhesive layer and the sealing layer are brought into close contact with each other. In this case, the adhesion and water tightness can be further improved by a method of sticking the asphalt roofing material 8 with an adhesive layer before curing.

  FIG. 9 is a longitudinal sectional view showing a ninth embodiment of the asphalt roofing waterproof structure. This embodiment is an embodiment relating to a sealing portion formed for the purpose of water stoppage in a roofing terminal. In the figure, when a self-adhesive waterproofing layer stacking part has a layer that can be easily adhered to the adhesive layer such as a film layer instead of surface sand on the lower roofing surface of the stacking part, asphalt with an adhesive layer After forming the waterproof layer by pasting the roofing material 8, the sealing portion 11 is formed at the end of the waterproof layer from the one-part curable resin composition according to any one of the above-described embodiments. The sealing part 11 is applied and formed in a rod shape with a roofing material stacking part of about 100 to 150 g / m so as to improve water tightness.

In each of the above examples, the adhesive layer 2 is formed by applying about 1.0 to 1.5 kg / m ² of a one-component curable resin composition. In addition, even if the existing waterproof layer is aged over several years to 20 years, the one-pack curable resin composition functions properly as an adhesive layer and a base treatment layer, so a new waterproof layer is firmly formed thereon. Can be built. Furthermore, since the one-component curable modified silicone resin composition can be handled at room temperature, various tools can be used, such as brushes, trowels, handle rods, and rollers, which are used in conventional thermal asphalt waterproofing methods. In addition, instruments used in painting can be used.

It is sectional drawing of 1st Example of asphalt roofing waterproofing structure. Similarly it is sectional drawing of 2nd Example. Similarly it is sectional drawing of 3rd Example. Similarly it is sectional drawing of 4th Example. Similarly it is sectional drawing of 5th Example. Similarly it is sectional drawing of 6th Example. Similarly it is sectional drawing of 7th Example. Similarly it is sectional drawing of 8th Example. Similarly it is sectional drawing of 9th Example.

Explanation of symbols

1. . . . . . . . . . . . Concrete foundation . . . . . . . . . . . Adhesive layer (base treatment layer)
3. . . . . . . . . . . . Asphalt roofing material4. . . . . . . . . . . . 4. Asphalt primer layer . . . . . . . . . . . Surface sand asphalt roofing material . . . . . . . . . . . Insulation layer 7. . . . . . . . . . . . Existing waterproofing layer 8. . . . . . . . . . . . 8. Surface sand asphalt roofing material with adhesive layer . . . . . . . . . . . Protective concrete layer10. . . . . . . . . . . . Sealing layer (part)
11. . . . . . . . . . . . Sealing material (part)

Claims (8)

A one-part curable resin composition comprising a reactive silicon group-containing organic polymer, a silanol condensation catalyst, an aqueous dispersion for improving adhesion at an adhesion interface, a plasticizer, and a filler. 2. The one-part curable resin composition according to claim 1, wherein the aqueous dispersion is composed of particles made of a synthetic resin emulsion, and includes a styrene butadiene styrene block copolymer emulsion, a styrene butadiene copolymer emulsion, and an 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, ethylene One-part curable resin characterized by being a single or a combination of two or more resin particles selected from vinyl acetate copolymer (EVA) emulsions Composition. 3. The one-part curable resin composition according to claim 1, wherein the blending amount of the silanol condensation catalyst (B) is 0.1 to 5 weights with respect to 100 parts by weight of the reactive silicon group-containing organic polymer (A). The blending amount of the particles (E) made of synthetic resin emulsion is 5 to 50 parts by weight (dry weight), and the plasticizer (C) is blended with respect to 100 parts by weight in total of the component (A) and the component (E) A one-part curable resin composition characterized in that the amount is 10 to 200 parts by weight and the amount of filler (D) is 50 to 400 parts by weight. The one-component curable resin composition according to claim 3, wherein the particles (E) made of the synthetic resin emulsion are styrene butadiene copolymers having a glass transition point of 10 to -50 ° C. Liquid curable resin composition. The one-component curable resin composition according to any one of claims 1 to 4, wherein the filler (D) contains asphalt. In the asphalt roofing waterproof structure formed by laminating asphalt roofing on the construction surface via an adhesive layer, the adhesive layer is formed of the one-part curable resin composition according to any one of claims 1 to 5. Asphalt roofing waterproof structure. The asphalt roofing waterproof structure according to claim 6, wherein a sealing part is formed on the overlapping part of the asphalt roofing, and the sealing part is formed by the one-part curable resin composition according to any one of claims 1 to 5. Asphalt roofing waterproof structure characterized by. The asphalt roofing waterproof structure according to claim 6 or 7, wherein a ground treatment layer is formed on the construction surface, and the ground treatment layer is formed of the one-part curable resin composition according to any one of claims 1 to 5. Asphalt roofing waterproof structure characterized by.

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