JP2016211364A - Waterproof structure, waterproofing method, and heat insulation material with heat shielding and waterproofing properties - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a highly adhesive and thin waterproof structure with excellent heat shielding and heat insulation properties, a waterproofing method for forming the waterproof structure, and a heat insulation material with heat shielding and waterproofing properties.SOLUTION: A waterproof structure includes: at least one waterproof layer 2 laminated on a building frame 1 and having a heat shielding property; at least one heat insulation layer 3 laminated on the waterproof layer and having heat shielding and waterproofing properties; and at least one top coat layer 4 laminated on the heat insulation layer and having the heat shielding property. A heat insulation material includes: core shell-type emulsion of which Tg is between -40°C and -20°C; an extender pigment of which an oil absorption rate is between 10 and 40 ml/100 g; a coloring pigment other than carbon black; and hollow particles of which an average grain size is between 30 and 300 μm.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a waterproof structure, a waterproof construction method, and a heat insulating material having heat shielding properties and waterproof properties.

  Applications of coating materials for outdoor buildings are mainly to add colors and patterns, but in recent years, coating materials having waterproofness and heat shielding properties have been developed.

  Patent Document 1 discloses a waterproof material excellent in contamination resistance and weather resistance. According to this waterproof material, since it has excellent stain resistance and weather resistance, it does not require a top coat and has high adhesion, so it can be directly applied to various buildings without the need for a primer. .

  Patent Document 2 discloses a waterproof material that is excellent in contamination resistance and weather resistance, and further excellent in heat shielding properties. According to this waterproof material, since it has excellent stain resistance and weather resistance, it does not require a top coat and has high adhesion, so it can be directly applied to various buildings without the need for a primer. . In addition, according to this waterproof material, since it has excellent heat shielding properties, it is not necessary to add anything that affects the physical properties of the coating film such as a hollow balloon to the waterproofing material, so that the coating film properties can be suitably adjusted. is there. Further, by using this waterproofing material as an intermediate coating material, it is possible to impart a heat shielding property superior to a method of applying a top coat having a normal heat shielding property.

Conventionally, a heat insulating material is used for the outer wall or the roof, and the use of the heat insulating material can restrict the movement of heat between the room and the outdoors. As for heat insulation, there are inner heat insulation and outer heat insulation.
In the inner heat insulation, a laminated structure is made in the order of an interior base, a heat insulating material, a casing such as concrete, a waterproof material, and an outer wall material such as a finish coating material from the indoor side to the outdoor side (see Patent Document 3).
On the other hand, in the outer insulation, a laminated structure is made in the order of an interior base, a housing such as concrete, an outer wall material such as a heat insulating material, a waterproof material, and a finish coating material from the indoor side to the outdoor side (see Patent Document 4).
Both the inner heat insulation and the outer heat insulation are made of a material different from the waterproof material and the heat insulation material, which is costly and requires a long construction period due to complicated operations. In addition, in the case of internal insulation, it has been reported that the wall surface is cooled by the outside air in winter and that condensation occurs near the wall surface. Furthermore, in heat insulation, heat insulation is laminated on the housing, so heat storage is easy, and waterproofing and finish coating materials laminated on the heat insulation deteriorate due to high temperatures, so waterproofing performance is long-term. Difficult to secure.

  In response to the above problems, Patent Document 5 proposes a heat insulating material configured by mixing hollow particles and an acrylic resin. By directly applying this heat insulating material to the housing, it is possible to easily and inexpensively perform heat insulating treatment that also serves as waterproof treatment on the outer wall or the like.

Japanese Patent No. 5411024 JP 2013-1778 A JP 2002-70188 A JP 2014-55435 A JP 2006-348618 A

  Patent Document 5 has a waterproof effect and a heat shielding effect on the heat insulating material, and the type of hollow particles is disclosed, but the optimum type of coating material to be combined with the hollow particles and the mixing ratio of the contained components, No specific consideration has been made. Further, since the acrylic coating film contains a large amount of hollow particles, it is difficult to obtain the elongation and strength of the coating film necessary for the waterproof material, and it is difficult to ensure the waterproof performance for a long period.

  Therefore, the present invention has been made in view of the above circumstances, and has a high waterproofness and a thin waterproof structure excellent in heat shielding and heat insulation, a waterproof construction method for forming the waterproof structure, And it aims at providing the heat insulating material which has heat insulation and waterproofness.

(1) The waterproof structure of the present invention includes at least one waterproof layer having a heat shielding property laminated on a casing, and at least one heat insulation property having a heat shielding property and waterproof property laminated on the waterproof layer. And a top coat layer having at least one heat-shielding property laminated on the heat insulating layer.
(2) It is preferable that the waterproof structure of the present invention forms a multilayer structure in which the waterproof layer, the heat insulating layer, and the top coat layer are in close contact and does not have water permeability.
(3) It is preferable that the waterproof structure of this invention coats the heat insulating material in which the said heat insulation layer contains the same coating material component as the waterproof material used for the said waterproof layer.
(4) In the waterproof structure of the present invention, the coating material component is a core-shell emulsion having a Tg of −40 ° C. to −20 ° C., an extender having an oil absorption of 10 to 40 ml / 100 g, and a coloring other than carbon black. It is preferably a coating material component containing a pigment and having a near infrared region solar reflectance of 50% or more.
(5) In the waterproof structure of the present invention, the coating material component contains 40 to 70% by mass of the core-shell emulsion, 10 to 40% by mass of the extender pigment, and 3.8% by mass or more of the color pigment. It is preferable.

(6) In the waterproof structure of the present invention, the extender pigment preferably has an average particle diameter of 2 to 20 μm.
(7) In the waterproof structure of the present invention, the heat insulating layer is preferably formed by coating a heat insulating material in which hollow particles having an average particle size of 30 to 300 μm are added to the coating material component.
(8) The waterproofing method of the present invention is a method for forming the waterproof structure according to any one of (1) to (7), and a step of laminating at least one layer of a waterproof material having heat shielding properties on the housing; A step of laminating at least one heat insulating material and a heat insulating material on the laminated waterproof layer, and a step of laminating at least one layer of a heat insulating top coat on the laminated heat insulating layer; It is characterized by having.
(9) The heat insulating material of the present invention has a core-shell emulsion having a Tg of −40 ° C. to −20 ° C., an extender having an oil absorption of 10 to 40 ml / 100 g, a color pigment other than carbon black, and an average particle size. It contains hollow particles having a size of 30 to 300 μm.
(10) The heat insulating material of the present invention is 40 to 70% by mass of the core-shell emulsion, 10 to 40% by mass of the extender pigment, 3.8% by mass or more of the colored pigment, and 4 to 20 of the hollow particles. It is preferable to contain by mass.
(11) In the heat insulating material of the present invention, the hollow particles are preferably at least one selected from the group consisting of inorganic particles, organic particles, and organic emulsions.

  ADVANTAGE OF THE INVENTION According to this invention, the heat insulation layer provided with the heat insulation effect and the waterproof effect can be easily provided to an outer wall etc.

It is a half section front view showing an example of an embodiment of a waterproof structure concerning the present invention. It is a half section front view showing an example of the conventional outside heat insulation structure.

<Waterproof structure>
1. Laminated structure of waterproof layer, heat insulating layer and topcoat layer FIG. 1 is a half cross-sectional front view showing an example of an embodiment of a waterproof structure according to the present invention. The waterproof structure of the present invention includes at least one waterproof layer 2 having a heat shielding property laminated on a casing 1 and at least one heat insulation layer having a heat shielding property and waterproof property laminated on the waterproof layer 2. A layer 3 and at least one top coat layer 4 having a heat shielding property laminated on the heat insulating layer.

  The frame means a framework that supports the structure of the building, such as a floor, a wall, or a beam. However, in the present invention, the frame includes a base constructed on the frame and is not particularly limited. Specifically, examples of the skeleton include mortar, concrete, and ALC (lightweight cellular concrete). In addition, examples of existing bases constructed on these include urethane, acrylic urethane, vinyl chloride, various plastics including FRP, synthetic rubber, sanding roofing, exterior wall finish coating materials, exterior wall boards, and the like.

In the present invention, heat insulation refers to reflection so as not to absorb light such as solar radiation, and long wavelength radiation emitted from a surface whose temperature has been increased by absorbing light such as solar radiation is not transmitted to the inside of the wall. As a result, the surface temperature of the wall is kept low as compared with the case where heat insulation is not performed.
On the other hand, heat insulation means that the amount of heat transmitted to the inside is reduced, and as a result, the back surface temperature of the wall is kept low as compared with a case where heat insulation is not performed.

  The waterproof structure of the present invention can restrict the movement of heat between the inside and outside of the outer wall, and the mechanism is as follows. First, in the top coat layer 4, light such as solar radiation is reflected, and long-wave radiation generated by light such as solar radiation is reduced, thereby reducing the amount of intrusion into the interior. Next, the heat transmitted without being prevented in the top coat layer 4 is absorbed by the heat insulating layer 3 to prevent the heat from being transmitted to the inside. Further, light such as solar radiation that cannot be prevented by the top coat layer 4 and the heat insulating layer 3 is reflected by the waterproof layer 2 to prevent heat from being transmitted to the inside. Therefore, by having a three-layer structure of the waterproof layer 2, the heat insulating layer 3, and the top coat layer 4, it is possible to suppress heat transfer over three stages.

FIG. 2 is a half sectional front view showing an example of a conventional outer heat insulating structure. The conventional outer heat insulating structure 30 has a structure in which a conventional heat insulating layer 13, a conventional waterproof layer 12, and a conventional top coat layer 14 are laminated in this order on a conventional casing 11. In this outer heat insulating structure, heat from the outside is accumulated in the conventional heat insulating layer 13, so that the conventional waterproof layer 12 and the conventional top coat layer 14 existing on the surface side become high temperature, and the heat is highly damaged, so that the water is waterproof. The heat insulation effect, the waterproof effect and the heat insulation effect decline with time. On the other hand, as shown in FIGS. 1A and 1B, the waterproof structures 10 and 20 of the present invention have a structure in which a waterproof layer 2, a heat insulating layer 3 and a top coat layer 4 are laminated in this order on a casing 1. Since the heat insulating layer 3 is on the surface side, heat is easily dissipated by the wind. Therefore, the waterproof effect, heat insulating effect, and heat shielding effect can be maintained over time.
Moreover, although the heat insulation layer 2 may be a plane like FIG. 1 (A), it is preferable to provide uneven | corrugated shape like FIG. 1 (B). By providing the concavo-convex shape, the surface area increases, and heat is easily radiated by wind before the heat insulation layer 2 stores heat. Further, the uneven shape may be any shape and can also serve as a pattern on the outer wall.

  The waterproof structure of the present invention preferably forms a multilayer structure in which the waterproof layer 2, the heat insulating layer 3 and the top cord layer 4 are in close contact with each other on the casing 1, and does not have water permeability. In the present specification, “not having water permeability” means that the water permeability in the JIS A 6909 building finish coating material 7.12 water permeability test B method is 0.5 ml or less. By forming a structure in which each layer is waterproof and in close contact, water penetration can be prevented. Moreover, it is preferable that the waterproof layer 2, the heat insulation layer 3, and the topcoat layer 4 are comprised by the component which does not mutually influence.

2. Coating material component contained in waterproof material and heat insulating material The heat insulating layer 3 forming the waterproof structure of the present invention is preferably formed by coating a heat insulating material containing the same coating material component as the waterproof material used in the waterproof layer 2. . The heat insulating layer 3 has high adhesion by applying a heat insulating material containing the same coating material component as the waterproof material used for the waterproof layer 2, and can exhibit an excellent waterproof effect and heat insulating effect. .

  The coating material component contained in the waterproof material and the heat insulating material is a core-shell emulsion having a Tg of −40 ° C. to −20 ° C., an extender having an oil absorption of 10 to 40 ml / 100 g, and a coloring pigment other than carbon black It is preferable that it is a coating material component containing the above, and the solar radiation reflectance is 50% or more. Here, the solar reflectance is the solar reflectance in the near-infrared region determined by JIS K5602.

(1) Core-shell type emulsion The Tg of the entire synthetic resin constituting the coating material component contained in the waterproof material and the heat insulating material must be -40 ° C to -20 ° C. If Tg is less than −40 ° C., sufficient contamination resistance cannot be obtained.

  The synthetic resin constituting the coating material component contained in the waterproof material and the heat insulating material must be a core-shell type. When the synthetic resin is not a core-shell type, adhesion cannot be obtained at a Tg of -40 ° C to -20 ° C. In the waterproof material of the present invention, it is preferable to select the monomer component constituting the core-shell emulsion composition so that the Tg of the shell part of the core-shell emulsion is lower than the Tg of the core part. By such selection, the adhesion can be maintained without impairing the coating film strength.

  The coating material component contained in the waterproof material and the heat insulating material preferably contains 40 to 70% by mass of the core-shell emulsion, and more preferably 55 to 60% by mass.

  Examples of the core-shell type emulsion include acrylic resin emulsion, acrylic silicon resin emulsion, urethane resin emulsion, fluororesin emulsion, epoxy resin emulsion, polyester resin emulsion, alkyd resin emulsion, melamine resin emulsion, etc., weather resistance, freedom of resin design Acrylic resin emulsions are preferred from the viewpoints of high degree and cost.

  As the acrylic resin emulsion, those obtained by radical copolymerization of an acrylic monomer and a monomer copolymerizable with the acrylic monomer can be used.

The monomer that can be used is not particularly limited, but is a (meth) acrylate monomer, an aromatic hydrocarbon vinyl monomer, a vinyl ester or an allyl compound, a nitrile group-containing vinyl monomer, Examples thereof include an epoxy group-containing vinyl monomer and a hydroxyl group-containing vinyl monomer.
In the present specification, “(meth) acrylate” means one or both of an acrylate having a hydrogen atom bonded to the α-position and a methacrylate having a methyl group bonded to the α-position.

  (Meth) acrylate monomers include methyl (meth) acrylate, ethyl (meth) acrylate, n-butyl (meth) acrylate, iso-butyl (meth) acrylate, tert-butyl (meth) acrylate, benzyl (meth) ) Acrylate, cyclohexyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, isodecyl (meth) acrylate, lauryl (meth) acrylate, tridecyl (meth) acrylate, stearyl (meth) acrylate, isobornyl (meth) acrylate, and the like. .

Examples of the aromatic hydrocarbon vinyl monomer include styrene, α-methylstyrene, chlorostyrene, 4-hydroxystyrene, vinyltoluene and the like.
Examples of vinyl esters and allyl compounds include vinyl acetate, vinyl propionate, and diallyl phthalate.
Examples of the nitrile group-containing vinyl monomer include (meth) acrylonitrile.
Examples of the epoxy group-containing vinyl monomer include glycidyl (meth) acrylate.
Examples of the hydroxyl group-containing vinyl monomer include 2-hydroxypropyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 2-hydroxyethyl vinyl ether, hydroxystyrene, Aronics 5700 (manufactured by Toagosei Chemical Co., Ltd.), and placelFA. -1, placcelFA-4, placcelFM-1, placcelFM-4 (manufactured by Daicel Chemical Industries, Ltd.), HE-10, HE-20, HP-10, HP-20 (manufactured by Nippon Shokubai Co., Ltd.) , Blemmer PEP series, Blemmer NKH-5050, Blemmer GLM (manufactured by Nippon Oil & Fats Co., Ltd.), hydroxyl group-containing vinyl modified hydroxyalkyl vinyl monomers, and the like.
As other monomers, compounds such as AS-6, AN-6, AA-6, AB-6, AK-5, which are macromonomers manufactured by Toa Synthetic Chemical Co., Ltd., vinyl methyl ether, propylene, Examples include butadiene.

Moreover, you may use the vinyl-type monomer which has the hydrophilic property which can improve stability of an emulsion.
Examples of the vinyl monomer include sodium styrenesulfonate, sodium 2-sulfoethyl methacrylate, 2-sulfoethyl methacrylate ammonium, and vinyl monomers having a polyoxyalkylene chain.
Examples of the vinyl monomer having a polyoxyalkylene chain include (meth) acrylic acid esters having a polyoxyalkylene chain.

  As the (meth) acrylic acid ester having a polyoxyalkylene chain, Nippon Oil & Fats Co., Ltd. Bremer PE-90, PE-200, PE-350, AE-90, AE-200, AE-350, PP-500, PP-800, PP-1000, AP-400, AP-550, AP-800, 700 PEP-350B, 10PEP-550B, 55PET-400, 30PET-800, 55PET-800, 30PPT-800, 50PPT-800, 70PPT- 800, PME-100, PME-200, PME-400, PME-1000, PME-4000, AME-400, 50POEP-800B, 50AOEP-800B, AEP, AET, APT, PLE, ALE, PSE, ASE, PKE, AKE, PNE, ANE, PNP, NP, PNEP-600, Kyoeisha Chemical Co., Ltd. light ester 130MA, 041MA, MTG, light acrylate EC-A, MTG-A, 130A, DPM-A, P-200A, NP-4EA, NP-8EA, EHDG- A, MA-30, MA-50, MA-100, MA-150, RMA-1120, RMA-564, RMA-568, RMA-506, MPG130-MA, Antox MS-60, MPG manufactured by Nippon Emulsifier Co., Ltd. -130MA, RMA-150M, RMA-300M, RMA-450M, RA-1020, RA-1120, RA-1820, Shin-Nakamura Chemical Co., Ltd. NK-ESTER M-20G, M-40G, M-90G, M-230G, AMP-10G, AMP-20G, AMP-60G, AM-90G, LA, three Kasei Co., Ltd. ELEMINOL RS-30, and the like.

  Even if a monomer having two or more polymerizable unsaturated bonds such as polyethylene glycol di (meth) acrylate, ethylene glycol di (meth) acrylate, triallyl cyanurate, allyl (meth) acrylate, divinylbenzene is used. Good. In this case, the generated particles have a structure having cross-linking, and the water resistance of the formed coating film is improved.

  In addition, trifluoro (meth) acrylate, pentafluoro (meth) acrylate, perfluorocyclohexyl (meth) acrylate, 2,2,3,3-tetrafluoropropyl (meth) acrylate, β- (perfluorooctyl) ethyl (meth) ) A fluorine-containing vinyl monomer such as acrylate may be used. As a result, a fluorine-containing acrylic resin emulsion having a high degree of water and oil repellency can be produced.

  Moreover, you may use a carbonyl group containing vinyl-type monomer for the said monomer. Thereby, the crosslinked acrylic resin emulsion which mix | blended the compound containing a hydrazine and / or a hydrazide group is producible.

  The acrylic resin emulsion can be obtained by adopting an ordinary synthesis method, and the emulsion polymerization method is carried out in consideration of reducing the particle size and stability of the emulsion, and further reducing the organic solvent content in the coating composition. preferable.

  The emulsion polymerization method is not particularly limited, and can be appropriately selected from various emulsion polymerization methods such as a batch polymerization method, a monomer dropping polymerization method, and an emulsion monomer dropping polymerization method.

  In emulsion polymerization, commonly used ionic or nonionic surfactants can be used.

  Examples of the ionic surfactant include an anionic surfactant having a polyoxyethylene chain, a sulfonate, and an ammonium salt.

  Examples of the anionic surfactant having a polyoxyethylene chain include polyoxyethylene nonylphenyl ether sulfate, polyoxyethylene allyl ether sulfate, octylphenoxyethoxyethyl sulfonate, polyoxyethylene tridecyl ether sulfate and the like.

Examples of the sulfonate include sodium lauryl sulfonate, sodium dodecyl benzene sulfonate, and sodium isooctyl benzene sulfonate.
Examples of the ammonium salt include imidazoline laurate and ammonium hydroxide.

  Examples of the nonionic surfactant include polyethylene glycol nonylphenyl ether; polyoxyethylenes such as polyoxyethylene nonylphenyl ether and polyoxyethylene lauryl ether; L-77, L-720, L-5410, Examples thereof include nonionic surfactants containing silicone such as L-7602 and L-7607 (manufactured by Union Carbide).

  In the present invention, it is preferable to use a reactive surfactant having a polymerizable double bond in one molecule as the surfactant in terms of water resistance and weather resistance. In particular, when a reactive surfactant having a polyoxyalkylene group in the molecule is used, the mechanical stability can be improved.

  The resin solid content concentration in the acrylic resin emulsion is preferably 20 to 70% by mass, more preferably 30 to 60% by mass. 50-55 mass% is especially preferable.

  The acrylic resin emulsion is not particularly limited as long as the overall Tg (glass transition temperature) is −40 ° C. to −20 ° C., DIC Co., Ltd. Boncoat, Watersol, Nippon Shokubai Co., Ltd. Udouble, Polysol manufactured by Showa Polymer Co., Ltd., Yodosol manufactured by Henkel Japan Co., Ltd., Kanebinol, Polytron manufactured by Asahi Kasei Kogyo Co., Ltd., Polydurex, Rikabond manufactured by Chuo Rika Kogyo Co., Ltd. Examples include Acronal manufactured by Co., Ltd., Movinyl manufactured by Clariant Polymer Co., Ltd., Zemlac manufactured by Kaneka Co., Ltd., and Kanebilak.

(2) Body Pigment In the coating material component contained in the waterproof material and the heat insulating material, a core-shell emulsion having a Tg of −40 ° C. to −20 ° C. is used. In addition, it is necessary to ensure the elongation that is the required performance as a waterproof coating material.

  Therefore, the coating material component contained in the waterproof material and the heat insulating material contains an extender pigment having an oil absorption of 10 to 40 ml / 100 g.

The oil absorption amount of the extender pigment is 10 to 40 ml / 100 g, preferably 10 to 40 ml / 100 g, and more preferably 22 to 27 ml / 100 g. When the oil absorption is 10 to 40 ml / 100 g, the strength of the coating material is sufficiently ensured. When it is 10 ml / 100 g or more, the average particle diameter of the extender pigment does not become excessive, and a smooth coating film can be maintained. When it is 40 ml / 100 g or less, the viscosity does not rise too much, and the coatability is high. Maintained.
In addition, the oil absorption amount of the extender pigment in the present invention is obtained by measuring by the oil method in boiled sardine in accordance with the provisions of JIS K 5101.

  The coating material component contained in the waterproof material and the heat insulating material preferably contains 10 to 40% by mass of the extender pigment, more preferably 25 to 30% by mass, and 25 to 28% by mass. Is particularly preferred.

  The average particle diameter of the extender pigment is preferably one that satisfies the above oil absorption range, more preferably 2 to 20 μm, and particularly preferably 3 to 10 μm.

  Examples of extender pigments used for the waterproof material and the heat insulating material include clay (such as kaolin), talc, aluminum silicate, calcium carbonate, aluminum oxide, mica, barium sulfate, and silica, and calcium carbonate is preferable.

(3) Colorant The coating material component contained in the waterproofing material and the heat insulating material contains a coloring pigment other than carbon black and substantially does not contain carbon black. However, it is necessary to mix | blend so that the solar reflectance of a waterproof material may be 50% or more, and 80% or more is especially preferable. In addition, the solar reflectance in this invention is the solar reflectance in the near-infrared area | region calculated | required by JISK5602.
Examples of the color pigment include white pigments such as titanium dioxide; black pigments such as iron black, aniline black, copper / chromium black, cobalt black, and complex oxide pigments such as copper / manganese / iron black; yellow iron oxide Yellow pigments such as titanium yellow, monoazo yellow, condensed azo yellow, azomethine yellow, bismuth vanadate, benzimidazolone, isoindolinone, isoindoline, quinophthalone, benzidine yellow, permanent yellow; orange pigments such as permanent orange; red oxidation Red pigments such as iron, naphthol AS azo red, ansanthrone, anthraquinonyl red, perylene maroon, quinacridone red pigment, diketopyrrolopyrrole, watching red, permanent red; cobalt purple, quinacridone violet, Violet pigments such as dioxazine violet; cobalt blue, phthalocyanine blue, blue pigments such as vat blue; etc. green pigments such as phthalocyanine green and the like.
Examples of glitter pigments include metallic pigments such as aluminum powder, bronze powder, copper powder, tin powder, iron phosphide and zinc powder; pearlescent pigments such as metal oxide-coated mica powder and mica-like iron oxide Can be mentioned.

  These color pigments and glitter pigments can be used alone or in any combination of two or more.

  In the coating material component contained in the waterproof material and the heat insulating material, the use ratio of the color pigment is preferably 2 to 20% by mass, and particularly preferably 3.8 to 10% by mass. However, care must be taken because the fluidity and the solar reflectance of the coating film vary depending on the type of the color pigment, and it is preferable not to contain carbon black having a high near infrared absorption factor.

(4) High boiling point solvent Moreover, in the coating material component contained in the said waterproof material and the said heat insulating material, you may add a high boiling point solvent as a plastic component.
Examples of the high boiling point solvent include 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate, ethylene glycol monopropyl ether, polyether polyol, ethylene glycol, diethylene glycol monobutyl ether, and dipropylene glycol normal butyl ether. , Propylene glycol monomethyl ether acetate, propylene glycol monoester and the like, and those having a boiling point of 200 ° C. or higher are preferable, 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate, ethylene glycol, diethylene glycol monobutyl ether Dipropylene glycol normal butyl ether is more preferable, and 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate is particularly preferable. .
Such a high boiling point solvent may be used from the viewpoint of imparting plasticity to the waterproof material and the heat insulating material, but should not be used from the viewpoint of heating and stretching.

(5) Antifoaming agent In the coating material component contained in the waterproofing material and the heat insulating material, the antifoaming agent is contained for the purpose of suppressing the foam generated in the finish of the coating film formed, the foam production stage, and breaking the foam. It is preferable to do.
In the coating material component contained in the waterproof material and the heat insulating material, examples of the antifoaming agent include hydrophobic silica or aliphatic amide antifoaming agent, mineral oil, silicone oil, silicone emulsion, silicone compounds such as polyorganosiloxane compounds. Aliphatic amide defoamers are preferred.

  Hydrophobic silica is obtained by organically modifying silica. For example, organohalosilane, dimethylsiloxane, hexamethyldisilazane, dimethyldichlorosilane, trisilane are added to silanol groups on the surface of mineral-derived or synthetic silica fine particles. Compound obtained by reaction bonding of methoxyoctylsilane, trimethylsilane, etc .; silica fine particles and dimethylpolysiloxane or dimethylhydropolyene polysiloxane having a hydroxyl group at the end are mixed and heat-treated at 200 to 300 ° C. to produce silica Compounds obtained by bonding alkylpolysiloxane to the surface of the fine particles; compounds obtained by vapor-phase adsorbing silicone oil on the surface of the silica fine particles, and the like. These may be used alone or in combination of two or more. it can.

  In the coating material component contained in the waterproof material and the heat insulating material, the antifoaming agent is preferably in the range of 0.01 to 5% by mass, and in the range of 0.1 to 2.0% by mass. More preferably.

(6) Viscosity adjusting agent Moreover, it is preferable that the coating material component contained in the said waterproof material and the said heat insulating material contains a viscosity adjusting agent from viewpoints, such as coating workability | operativity and pigment sedimentation prevention.

  Examples of the viscosity modifier include inorganic compounds such as water-soluble alkali silicate, montmorillonite and colloidal alumina; fibrin derivative compounds such as methyl cellulose, hydroxyethyl cellulose and carboxymethyl cellulose; pluronic polyether, polyether dialkyl ester and polyether Polyether compounds such as dialkyl ether, polyether urethane modified products, polyether epoxy modified products; polyacrylic acid compounds such as polyacrylic acid soda and polyacrylic acid (meth) acrylic acid ester copolymers; polyvinylpyrrolidone, polyvinyl Polyvinyl compounds such as alcohol and polyvinylbenzyl alcohol copolymer; protein derivatives such as sodium caseinate and ammonium caseinate; vinyl methyl ether-maleic anhydride Partial esters copolymer, drying oil fatty allyl alcohol ester - half ester-maleic anhydride copolymers such as such as the reaction product of maleic acid. Anhydride, which may be used singly or in combination of two or more.

  In the coating material component contained in the waterproof material and the heat insulating material, the amount of the viscosity modifier used is preferably in the range of 0.1 to 5% by mass, and 0.1 to 1.5% by mass. It is more preferable to be within the range.

(7) Dispersant Moreover, it is preferable that the coating material component contained in the said waterproof material and the said heat insulating material contains a dispersant.
As the usage-amount of the said dispersing agent, it is preferable to exist in the range of 0.1-5 mass%, and it is more preferable to exist in the range of 0.5-1.5 mass%.

(8) Alcohol-based solvent In the coating material component contained in the waterproof material and the heat insulating material, examples of the organic solvent that can be blended include esters, ethers, ketones, alcohols, and the like, and alcohols are preferable.

  Esters include ethylene glycol monomethyl ether acetate, ethylene glycol monoethyl ether acetate, ethylene glycol monobutyl ether acetate, diethylene glycol monomethyl ether acetate, diethylene glycol monomethyl ether acetate, propylene glycol monomethyl ether acetate, propylene glycol diacetate, ethyl acetate, butyl acetate. , 2,2,4-trimethylpentadiol-1,3-monoisobutyrate, etc., ethers include ethylene glycol dimethyl ether, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, diethylene glycol dimethyl ether, diethylene glycol dibutyl ether, dipropylene glycol Dimethyl ether, ethylene Cole monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monopropyl ether, ethylene glycol monobutyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, propylene glycol monomethyl ether, propylene glycol monoethyl ether, ethyl ether, butyl ether, dioxane, etc., ketone Examples of the alcohol include acetone and methyl ethyl ketone, and examples of the alcohol include methanol, ethanol, n-propanol, isopropanol, butanol, octanol, ethylene glycol, propylene glycol, and benzyl alcohol.

  These organic solvents may be used alone or in combination of two or more. The amount of the organic solvent used is preferably in the range of 0.1 to 5% by mass, and more preferably in the range of 1 to 2% by mass.

(9) Others In the coating material component contained in the waterproof material and the heat insulating material, a curing catalyst, a fragrance, a deodorant, an antibacterial agent, a neutralizer, a surfactant, an aqueous water repellent, Additives for paints such as antiseptics, antifungal agents, antialgae agents, antifreezing agents, ultraviolet absorbers, light stabilizers, antioxidants, antifouling agents, plasticizers and the like can be contained.

(10) Coating material component having heat insulation The heat insulating material for coating the heat insulating layer 3 has an average particle diameter of 30 to 300 μm in the waterproof material used for the waterproof layer 2 containing the above-described coating material component. It can be easily prepared by mixing hollow particles. Conventionally, heat insulation is made by foaming urethane to give heat insulation, but foamed urethane is not waterproof and absorbs water, resulting in poor heat insulation, making it difficult to use on the outer wall. . However, the heat insulating layer forming the waterproof structure of the present invention is laminated with a heat insulating material in which foamed hollow particles are mixed with a waterproof material, so that it does not absorb water and can have both waterproof and heat insulating properties.

3. The coating material component contained in the top coat The top coat layer 4 is a layer in which a top coat having heat shielding properties is laminated, and is not limited to an aqueous material, and may be either a weak solvent type or a strong solvent type. Examples of the synthetic resin constituting the coating material component included in the top coat of the present invention include synthetic resins such as acrylic resin, acrylic silicon resin, and urethane resin, and one-component and two-component curable synthetic resins such as fluororesin. It is done. Moreover, as a form of resin, an emulsion, a non-aqueous emulsion, a weak solvent soluble form, a strong solvent soluble form, etc. are mentioned.
Examples of extender pigments include calcium carbonate, clay, talc, mica, barium sulfate, silica, aluminum oxide, and aluminum silicate. Examples of color pigments include color pigments for various paints. However, it is necessary to mix | blend so that the solar reflectance as a topcoat may be 50% or more, and carbon black is not included substantially. In addition, the solar reflectance in this invention is the solar reflectance in the near-infrared area | region calculated | required by JISK5602. In addition, dispersants, antifoaming agents, emulsifiers, plasticizers, antiseptics, antifungal agents, algaeproofing agents, hydrophilic agents, water repellents, antifoaming agents, light stabilizers, UV absorbers, antifreezing agents, Additives for paints such as antibacterial agents, antioxidants, and effective catalysts, and various solvents that are compatible with the synthetic resin used can be contained.

<Waterproofing method>
In the present invention, the above-described method for forming the waterproof structure includes a step of laminating at least one waterproof material having a heat shielding property on the casing, and a heat shielding property and a waterproof property on the laminated waterproof layer. A step of laminating at least one layer of heat insulating material, and a step of laminating at least one layer of a heat-insulating topcoat on the laminated heat insulating layer.

  Since the waterproof material used for forming the waterproof structure of the present invention has high adhesion, it can be applied without a primer on the casing.

  Examples of the application method include known methods using brushes, roller brushes, air sprays, airless sprays, and the like. In the present invention, since a paint having excellent adhesion is used, when applying to an existing coating film, it is not necessary to perform a sealer or primer treatment, and it can be applied directly. Moreover, when apply | coating to the raw material as it is, it is preferable to perform a sealer process as needed according to the kind of raw material.

The coating amount is preferably changed as appropriate according to the solid content concentration and density of the paint, the type and use of the material, the existing coating film or the intermediate coating material layer, the presence or absence of a pattern, and the like. Usually, in order to form a coating film having a uniform thickness, the coating viscosity is 5 to 80 Pa · s and the coating amount is 0.8 to 2.0 kg / m ² in several times.

<Insulation material>
The heat insulating material of the present invention includes a core-shell emulsion having a Tg of −40 ° C. to −20 ° C., an extender having an oil absorption of 10 to 40 ml / 100 g, a color pigment other than carbon black, and an average particle size of 30 to 300 μm. Containing hollow particles.

  The core-shell emulsion, extender pigment, and colorant are as described in the coating material component in the waterproof structure. The heat insulating material of the present invention has high adhesion and waterproofness by containing a core-shell emulsion having a Tg of −40 ° C. to −20 ° C. and an extender pigment having an oil absorption of 10 to 40 ml / 100 g. Further, by containing a coloring pigment other than carbon black, it has a heat shielding property by reflecting sunlight. Furthermore, by containing hollow particles, a fine air layer is formed in the heat insulating material, and thus has heat insulating properties.

  The heat insulating material of the present invention preferably contains 40 to 70% by mass of the core-shell emulsion, 10 to 40% by mass of the extender pigment, and 3.8% by mass or more of the color pigment. Moreover, it is preferable to contain 4-20 mass% of said hollow particles, and it is still more preferable to contain 9-20 mass%.

  The average particle size of the hollow particles contained in the heat insulating material of the present invention is preferably 30 μm to 300 μm, more preferably 100 μm to 200 μm.

  The hollow particles contained in the heat insulating material of the present invention are at least one selected from the group consisting of inorganic particles, organic particles, and organic emulsions. In addition, the heat insulating effect is higher for organic particles and organic emulsions, but inorganic particles are superior in terms of cost. Examples of the organic particles include copolymers such as vinyl chloride, acrylonitrile, acrylic acid esters, and methacrylic acid esters. Examples of the organic emulsion include copolymer emulsions such as acrylic acid esters and methacrylic acid esters. Examples of inorganic particles include ceramic, fly ash, silicate glass, pearlite, vermiculite and the like.

  It is preferable that the heat insulating material of this invention is used for the above-mentioned waterproof structure and waterproofing construction method.

  EXAMPLES Hereinafter, although an Example and a comparative example demonstrate this invention further more concretely, this invention is not limited to a following example.

[Reference Example 1]
1. Preparation of Waterproof Material Core-shell emulsion composition (Dow Coating Materials, Elastin 2885) 58.4% by mass, Dispersant (Dow Coating Materials, Primal 850FF) 0.9% by mass, titanium dioxide 7.7 A dispersion paste was prepared by mixing and dispersing part mass%, calcium carbonate (average particle size 5.4 μm, oil absorption 24 mg / 100 g) 26.9 mass% and defoaming agent 0.8 mass%. Further, 0.2% by mass of the defoaming agent, 0.2% by mass of the thickener and the dispersion paste were mixed and stirred to obtain a waterproof material. The carbon black content is 0% by mass.

2. Adhesion test The prepared waterproof material was measured by the following adhesion test method, and the results are shown in Table 1.
(1) Adhesion after standard curing After the coating material of Example 1 was applied to a substrate, it was cured in 23 ° C. and 50% RH for 24 hours, and the adhesion test shown in (3) was performed.
(2) Adhesion after water resistance test After the test of (1), the substrate coated with the prepared coating material was immersed in water for 24 hours, taken out, and then cured in 23 ° C and 50% RH for 24 hours. The adhesion test shown in FIG.
(3) Adhesion test method (conforms to JIS K 5600-5-6)
A grid pattern of 2 mm width was cut into the coating film formed on the base material by 100 squares by a cutter. A cellophane tape (registered trademark) was affixed on the cut, and the cellotape (registered trademark) was peeled off quickly to confirm how many cells were peeled out of 100 cells. In the table, the number of cells peeled / 100 cells was described.

  As shown in Table 1, the waterproof material showed excellent adhesion to mortar, concrete, ALC (lightweight cellular concrete), acrylic urethane, vinyl chloride, synthetic rubber, sanding roofing, and further excellent water resistance.

[Reference Example 2]
The heat shielding property of the waterproof material prepared in Reference Example 1 was evaluated by the following method, and the results are shown in Table 2.
(1) Solar reflectance (based on JIS K 5602)
The waterproof material prepared in Reference Example 1 was applied to a cover factor test paper specified in 4.1.2 of JIS K 5600-4-1, measured with a spectrophotometer on the black surface, and measured according to JIS K 5602. The solar reflectance in the infrared region is described.

  As shown in Table 2, the waterproof material prepared in Reference Example 1 showed very high solar reflectance.

[Example 1]
An acrylic rubber-based certified product for the outer wall of JIS A 6021 architectural waterproofing coating was applied to the base material as a thermal barrier waterproofing material. 56.7% by mass of core-shell type emulsion composition (manufactured by Dow Coating Material, Elastin 2885), 26.1% by mass of extender pigment (calcium carbonate), and 7.4% by mass of color pigment (titanium dioxide) . Moreover, the solar reflectance in the near outside area | region of a heat-insulating waterproof material is 80% or more.
Further, a free film in which a hollow ceramic balloon (average particle size: 175 μm) was mixed in an amount of 20% by mass with respect to the total amount was further applied to the heat insulating waterproof material, cured, and peeled from the substrate. The thickness was about 5 mm.

[Comparative Example 1]
In the same manner as in Example 1, only the thermal barrier waterproof material was applied, and the thermal barrier waterproof material including the hollow ceramic balloon was cured without being applied to obtain a free film. The thickness was about 5 mm.

[Test Example 1] Verification of heat insulation effect In a constant temperature and humidity environment (temperature: 23 ° C., humidity: 50%), a xenon lamp (100 W) was placed at the center of each free film produced in Example 1 and Comparative Example 1. Irradiated. A temperature sensor (Ondori TR-71U, manufactured by T & D Co., Ltd.) was attached to the center of the front and back surfaces of each free film, and measurements were taken until a certain temperature was reached. The results are shown in Table 3.

  From Table 3, in Comparative Example 1, the difference between the surface temperature and the back surface temperature was 7 ° C., whereas in Example 1, the difference between the surface temperature and the back surface temperature was 11 ° C. Therefore, it was speculated that the inclusion of the hollow ceramic balloon provided a heat insulation effect, making it difficult for heat to be transferred to the back surface.

[Example 2]
A JIS A 6021 coating film waterproofing material for architectural use and an acrylic rubber-based certified product for outer walls were applied to the base material using a roller as a heat shielding waterproofing material. 56.7% by mass of core-shell type emulsion composition (manufactured by Dow Coating Material, Elastin 2885), 26.1% by mass of extender pigment (calcium carbonate), and 7.4% by mass of color pigment (titanium dioxide) . Moreover, the solar radiation reflectance in the near-infrared area | region of a heat-insulating waterproof material is 80% or more.
After curing the heat insulating waterproofing material, a mixture of hollow ceramic balloons (average particle size of 175 μm) in the heat insulating waterproofing material with a mass of 15% by mass as a pattern layer is applied using a sand bone roller. Thereafter, a dedicated heat-shielding top coat was applied. These were cured to produce a free film peeled from the substrate. Table 4 shows the coating specifications.

[Example 3]
In the same manner as in Example 2, the heat insulating waterproof material was applied using a roller. After curing the heat-insulating waterproofing material, a mixture of 15% by mass of a hollow fly ash balloon (average particle size of 80 to 120 μm) with the heat-insulating waterproofing material as a pattern layer with respect to the total amount is used as a pattern layer. And applied. Thereafter, the same topcoat as in Example 2 was applied and cured, and a free film was produced in the same manner. Table 4 shows the coating specifications.

[Comparative Example 2]
In the same manner as in Example 2, the heat insulating waterproof material was applied using a roller. After the heat-insulating waterproof material was cured, the heat-insulating waterproof material containing no hollow particles as a pattern layer was applied using a sand bone roller. Thereafter, the same topcoat as in Example 2 was applied and cured, and a free film was produced in the same manner. Table 4 shows the coating specifications.

[Comparative Example 3]
By the method similar to Example 2, what was prescribed | regulated to JIS A 6909 building finishing coating material waterproofing type multilayer coating material E was apply | coated using the sand-bone roller based on the application | coating specification. This material does not have a heat-insulating or heat-insulating effect. Then, the exclusive topcoat of the same color as the topcoat used in Example 2 was applied. The top coat does not have a heat shielding effect. Thereafter, a free film was produced in the same manner as in Example 2. Table 4 shows the coating specifications.

[Test Example 2] Verification of heat insulation effect The xenon lamp (100 W) of the free film produced in Examples 2 and 3 and Comparative Examples 2 and 3 in an environment of constant temperature and humidity (temperature: 23 ° C., humidity: 50%) Each was irradiated in the center. A temperature sensor (Ondori TR-71U, manufactured by T & D Co., Ltd.) was attached to the center of the front and back surfaces of each free film, and measurements were taken until a certain temperature was reached. The results are shown in Table 5.

  From Table 5, the temperature difference of Comparative Example 2 was 6.2 ° C., and Comparative Example 3 was 4.8 ° C., whereas Example 2 was 7.6 ° C. and Example 3 was 8.1 ° C. Met. Therefore, it was inferred that the inclusion of hollow particles in the pattern layer produced a heat insulation effect, making it difficult for heat to be transferred to the back surface.

[Example 4]
JIS A 6021 coating waterproofing material for buildings, acrylic rubber-based certified product for outer walls, heat-resistant waterproofing material, hollow fly ash balloon (average particle size 80-120 μm) as a whole A mixture of 15% by mass with respect to the amount was applied so that the dry coating thickness was 1.5 to 1.7 mm. Subsequently, this was cured to produce a free film peeled from the substrate.
The thermal barrier waterproof material is 56.7% by mass of core-shell type emulsion composition (manufactured by Dow Coating Material, Elastin 2885), 26.1% by mass of extender pigment (calcium carbonate), and 7.7% of color pigment (titanium dioxide). 4% by mass is contained. Moreover, the solar radiation reflectance in the near-infrared area | region of a heat-insulating waterproof material is 80% or more.

[Comparative Example 4]
A JIS A 6021 coating film waterproofing material for architectural use and an acrylic rubber-based certified product for outer walls were applied to the base material so as to have a dry coating film thickness of 1.5 to 1.7 mm. Subsequently, this was cured to produce a free film peeled from the substrate.

[Test Example 3] Measurement of thermal conductivity The free films produced in Example 4 and Comparative Example 4 were measured by a test method for the thermal conductivity of JIS R 2601 refractory insulating brick. The test results are shown in Table 6.

  From Table 6, compared with the comparative example 4 using the coating material which does not contain a hollow particle, in Example 4 using the coating material which mix | blended the hollow particle, thermal conductivity was small. The heat conductivity of a general heat insulating paint is in the range of 0.1 to 0.2, and it was confirmed that the heat insulating performance was improved by blending hollow particles.

  From the above results, according to the present invention, the thin waterproof structure having high adhesiveness and excellent in heat shielding properties and heat insulation properties, the waterproof construction method for forming the waterproof structure, and the heat shielding properties and waterproof properties. It is clear that a heat insulation material can be provided.

  DESCRIPTION OF SYMBOLS 1 ... Housing, 2 ... Waterproofing layer, 3 ... Heat insulation layer, 4 ... Topcoat layer, 10,20 ... Waterproof structure, 11 ... Conventional housing, 12 ... Conventional waterproofing layer, 13 ... Conventional heat insulation layer, 14 ... Conventional Top coat layer of 30 ... Conventional outer heat insulating structure.

Claims (11)

A waterproof layer having at least one thermal barrier property laminated on the housing;
At least one heat-insulating and waterproofing layer laminated on the waterproof layer;
At least one heat-shielding topcoat layer laminated on the heat-insulating layer;
A waterproof structure characterized by comprising:   The waterproof structure according to claim 1, wherein the waterproof layer, the heat insulating layer, and the top coat layer form a multi-layered structure and does not have water permeability.   The waterproof structure according to claim 1 or 2, wherein the heat insulating layer is coated with a heat insulating material containing the same coating material component as that of the waterproof material used for the waterproof layer.   The coating material component is a coating material component containing a core-shell emulsion having a Tg of −40 ° C. to −20 ° C., an extender pigment having an oil absorption of 10 to 40 ml / 100 g, and a coloring pigment other than carbon black. The waterproof structure according to claim 3, which is a coating material component whose solar reflectance in the near infrared region is 50% or more.   The waterproof structure according to claim 4, wherein the coating material component contains 40 to 70% by mass of the core-shell emulsion, 10 to 40% by mass of the extender pigment, and 3.8% by mass or more of the color pigment.   The waterproof structure according to claim 4 or 5, wherein the extender has an average particle diameter of 2 to 20 µm.   The waterproof structure according to any one of claims 4 to 6, wherein the heat insulating layer is formed by applying a heat insulating material obtained by adding hollow particles having an average particle size of 30 to 300 µm to the coating material component. A method for forming the waterproof structure according to claim 1,
A step of laminating at least one layer of a water-proof waterproof material on the housing;
A step of laminating at least one layer of a heat insulating and waterproof heat insulating material on the laminated waterproof layer;
A step of laminating at least one top coat having a heat shielding property on the laminated heat insulating layer;
A waterproof construction method characterized by comprising:   A core-shell emulsion having a Tg of −40 ° C. to −20 ° C., an extender having an oil absorption of 10 to 40 ml / 100 g, a color pigment other than carbon black, and hollow particles having an average particle size of 30 to 300 μm Insulation characterized by that.   The core-shell emulsion is 40 to 70% by mass, the extender pigment is 10 to 40% by mass, the color pigment is 3.8% by mass or more, and the hollow particles are 4 to 20% by mass. Insulation.   The heat insulating material according to claim 9 or 10, wherein the hollow particles are at least one selected from the group consisting of inorganic particles, organic particles, and organic emulsions.

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