JP6369849B2 - Thermal insulation coating material, thermal insulation building material, and building repair method - Google Patents

Description

  The present invention relates to a heat insulating material such as a building.

  Conventionally, in order to suppress the temperature change inside the building, heat insulating materials such as urethane foam, phenol foam, cellulose fiber, rock wool, etc. are formed into a sheet on the inside and outside of the building materials such as the outer wall and roof that constitute the building. Placement is widely practiced.

  For example, Patent Document 1 discloses a heat insulating structure characterized in that a coating layer containing an infrared reflective pigment is provided on the outdoor side of a wall material in which a heat insulating material is disposed.

  However, in the inner heat insulation method in which the heat insulating material is arranged inside the building material, the heat insulating material inside the building material gradually falls off due to moisture in the air, or deteriorates over time due to heat in the summer, etc. Therefore, even if sufficient heat insulation can be exhibited at the initial stage of construction, it is difficult to exhibit stable heat insulation over a long period of time.

  On the other hand, in Patent Document 2, a metal lath (wire net) is fastened on the outside of a building base with a phenolic heat insulating material, a glass fiber mortar is applied on the metal lath, and a finish coating is performed. An insulation method is described.

  According to such a construction method, an outer heat insulating wall having few cracks and excellent fire resistance even in a fire can be obtained.

  However, the construction method described in Patent Document 1 is troublesome and requires man-hours such as fixing the heat insulating material to the building material, and there is a problem that the waterproofness and heat insulating properties of the joint portion of the heat insulating material are insufficient. is there.

JP 2008-291644 A JP 2002-235386 A

  An object of the present invention is to propose a heat-insulating coating material capable of obtaining a heat-insulating layer exhibiting stable heat insulation and waterproofing properties over a long period of time, and a heat-insulating building material using the same.

  As a result of intensive studies on the above-mentioned problems, the present inventors have made a heat insulation coating material that includes a hollow compound and a fibrous compound having a specific shape, and that exhibits stable heat insulation and waterproofness over a long period of time. The present inventors have found that a layer can be formed and an excellent heat insulating building material is provided.

That is, the present invention
1. A flame retardant comprising a synthetic resin emulsion (A) having an acrylate containing an alkyl group having 4 or more carbon atoms as a copolymerization component , hollow particles (B), a flame retardant (C) and a fibrous compound (D) The compounding amount of the chemical compound (C) is in the range of 10 to 300 parts by mass with respect to 100 parts by mass of the resin solid content of the synthetic resin emulsion (A), and the fibrous compound (D) has an aspect ratio of 1. 5 to 250 fibrous inorganic compounds, a heat insulating coating material,
2. A synthetic resin emulsion having a coating type heat insulating layer, wherein the heat insulating coating material for forming the coating type heat insulating layer comprises an acrylate containing an alkyl group having 4 or more carbon atoms as a copolymerization component ( A), hollow particles (B), flame retardant (C) and fibrous compound (D), the fibrous compound (D) is a fibrous inorganic compound having an aspect ratio of 1.5 to 250 Heat insulating building materials,
3. A heat insulating building material in which a cement composition is applied to the outdoor side of the masonry wall, and a heat insulating layer is formed by applying the heat insulating coating material according to item 1 or 2 to the surface of the formed cement layer;
4). The heat insulating building material according to item 2 or 3, further comprising a white heat shielding layer having a solar reflectance of 75% or more on the heat insulating layer,
5.2 A building constructed using the heat insulating building material according to any one of items 2 to 4;
A method for renovating a building, characterized by using the heat insulating coating material described in 6.1.
About.

  Since the heat insulating layer by the heat insulating coating material of the present invention has dense air inside and is provided on the base material without joints or the like, a heat insulating building material that exhibits stable heat insulation and waterproofness for a long period of time is provided. Can be obtained.

  Therefore, the interior of the building constructed using the heat insulating building material of the present invention is less susceptible to the outside air temperature, can be a comfortable environment both in summer and winter, prevent condensation on the surface, reduce the energy required for air conditioning You can also.

  Moreover, since the heat insulation building material of this invention is comparatively light, there also exists an advantage with little load and load with respect to a building.

  And since a heat insulation layer is a coating type, the painter can adjust the unevenness of a to-be-coated surface easily, and can also perform construction and repair with respect to a new installation or an existing building easily.

<Resin emulsion (A)>
The resin emulsion (A) used in the present invention is, for example, an acrylic resin, a vinyl acetate resin, a vinyl chloride resin, a styrene / butadiene resin, an epoxy resin, an alkyd resin, a polyester resin, a silicon resin, Fluorine-based resins, polyurethane-based resins, acrylic urethane-based resins (including two-liquid type), and the like can be used, and these can be used alone or in combination of two or more.

  In particular, as a resin emulsion, in a non-crosslinked system, a (co) polymer obtained by emulsion polymerization of one or more vinyl monomers selected from (meth) acrylic acid alkyl ester, styrene, vinyl acetate, unsaturated acid, etc. Emulsions are preferred, and in a crosslinked system, a crosslinked emulsion containing a carbonyl group-containing acrylic (co) polymer and a hydrazine compound, or a combination of the emulsion and an aqueous polyurethane resin is preferred from the standpoint of drying properties.

  Specifically as a monomer used as the copolymerization component of the resin emulsion (A), methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, n-butyl (meth) acrylate, i-butyl (Meth) acrylate, t-butyl (meth) acrylate, n-pentyl (meth) acrylate, n-hexyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, lauryl (meth) acrylate, stearyl (meth) acrylate, etc. (Meth) acrylate containing linear or branched alkyl; alicyclic (meth) acrylate such as cyclohexyl (meth) acrylate and isobornyl (meth) acrylate; 2-hydroxyethyl (meth) acrylate, 2-hydroxy Propyl (meth) acrelain , Hydroxyalkyl (meth) acrylates such as 3-hydroxypropyl (meth) acrylate and hydroxybutyl (meth) acrylate, allyl alcohol, ε-caprolactone modified product of the above hydroxyalkyl (meth) acrylate, polyoxy having molecular end at hydroxyl group Hydroxyl group-containing polymerizable unsaturated monomers such as ethylene chain-containing (meth) acrylate; carboxyl group-containing polymerizable unsaturated monomers such as (meth) acrylic acid, maleic acid, crotonic acid, and β-carboxyethyl acrylate; styrene, α-methyl Vinyl aromatic compounds such as styrene; (meth) acrolein, formylstyrene, vinyl alkyl ketones having 4 to 7 carbon atoms (for example, vinyl methyl ketone, vinyl ethyl ketone, vinyl butyl ketone, etc.), acetoacetoxyethyl ( ) Carbonyl group-containing polymerizable unsaturated monomers such as acrylate, acetoacetoxyallyl ester, diacetone (meth) acrylamide; aralkyl (meth) acrylates such as benzyl (meth) acrylate; 2-methoxyethyl (meth) acrylate, 2- Alkoxyalkyl (meth) acrylates such as ethoxyethyl (meth) acrylate; perfluoroalkyl (meth) acrylate, N, N-diethylaminoethyl (meth) acrylate; (meth) acrylamide, (meth) acrylonitrile; vinyl acetate, vinyl propionate Vinyl ester compounds such as allyl (meth) acrylate, ethylene glycol di (meth) acrylate, triethylene glycol di (meth) acrylate, tetraethylene glycol di (meth) acrylate 1,3-butylene glycol di (meth) acrylate, trimethylolpropane tri (meth) acrylate, 1,4-butanediol di (meth) acrylate, neopentyl glycol di (meth) acrylate, 1,6-hexanediol Di (meth) acrylate, pentaerythritol di (meth) acrylate, pentaerythritol tetra (meth) acrylate, glycerol di (meth) acrylate, 1,1,1-trishydroxymethylethanedi (meth) acrylate, 1,1,1 -Trishydroxymethylethane tri (meth) acrylate, 1,1,1-trishydroxymethylpropane tri (meth) acrylate, triallyl isocyanurate, diallyl terephthalate, divinylbenzene, etc. Polyvinyl compounds having a polymerizable unsaturated group of glycidyl (meth) acrylate, β-methylglycidyl (meth) acrylate, 3,4-epoxycyclohexylmethyl (meth) acrylate, 3,4-epoxycyclohexylethyl (meth) Epoxy group-containing polymerizable unsaturated monomers such as acrylate, 3,4-epoxycyclohexylpropyl (meth) acrylate, and allyl glycidyl ether; isocyanate ethyl (meth) acrylate, m-isopropenyl-α, α-dimethylbenzyl isocyanate, etc. Isocyanate group-containing polymerizable unsaturated monomer; alkoxy such as vinyltrimethoxysilane, vinyltriethoxysilane, γ-methacryloyloxypropyltrimethoxysilane, γ-methacryloyloxypropyltriethoxysilane Silyl group-containing polymerizable unsaturated monomer; reaction product of epoxy group-containing polymerizable unsaturated monomer or hydroxyl group-containing polymerizable unsaturated monomer and unsaturated fatty acid, dicyclopentenyloxyethyl (meth) acrylate, dicyclopentenyloxypropyl Examples thereof include oxidatively curable group-containing polymerizable unsaturated monomers such as (meth) acrylate and dicyclopentenyl (meth) acrylate, and these can be used alone or in combination of two or more.

  Among the above monomers, if an acrylate containing a linear or branched alkyl group having 4 or more carbon atoms is used, the sealer coating step before applying the heat-insulating coating material can be omitted, or the substrate surface can be When the coating film remains, the adhesion with the old coating film is good and suitable.

  Examples of the acrylate containing an alkyl group having 4 or more carbon atoms include n-butyl acrylate, i-butyl acrylate, t-butyl acrylate, n-pentyl acrylate, n-hexyl acrylate, 2-ethylhexyl acrylate, lauryl acrylate, and stearyl. An acrylate etc. are mentioned, It can use individually or in combination of 2 or more types.

<Hollow particles (B)>
The hollow particles (B) used in the present invention are blended from the viewpoint of the heat insulating properties of the heat insulating layer, and specifically include, for example, expanded polystyrene particles, expanded polyethylene particles, expanded polypropylene particles, expanded polyurethane and the like. Resin foam particles; inorganic foam particles such as pearlite, volcanic rubble, and burned vermiculite; acrylic resin, styrene resin, acrylic-styrene copolymer resin, acrylic-acrylonitrile copolymer resin, acrylic-styrene-acrylonitrile copolymer resin Organic balloons of resins such as acrylonitrile-methacrylonitrile copolymer resins, acrylic-acrylonitrile-methacrylonitrile copolymer resins, vinylidene chloride-acrylonitrile copolymer resins; silica balloons, glass balloons such as shirasu balloons, alumina silica balloons, etc. Inorganic balloons such as a ceramic balloon; the surface of the organic balloons silica, decorative organic inorganic composite balloons and the like inorganic materials such as alumina, which can be used alone or in combination of two or more.

  Among these, resin foam particles and organic-inorganic composite balloons are suitable from the viewpoint of heat insulation and waterproofness of the heat insulation layer.

  As an average particle diameter of the said hollow particle (B), 0.02-8 mm, especially 0.05-2 mm are preferable from a viewpoint of coating workability | operativity and a coating-material viscosity.

  In the present invention, the average particle size is defined as a value measured by a particle size distribution measuring device.

  The blended amount of the resin foam particles (B) is such that the solid content volume ratio of the resin emulsion (A) / hollow particles (B) is 100/80 to 100/1000, preferably 100/150 to 100/700. Such inclusion is suitable from the viewpoint of heat insulation, thick film properties and coating strength.

<Flame Retardant (C)>
The heat insulating coating material of the present invention contains a flame retardant (C). Although conventionally known materials can be used as the flame retardant (C), specifically, decabromodiphenyl ether, octabromodiphenyl ether, tetrabromodiphenyl ether, hexabromocyclododecane, bistribromophenoxyethane, ethylenebistetrabromophthalimide, Brominated flame retardants such as tetrabromoethane and hexafate; trimethyl phosphate: triethyl phosphate, tributyl phosphate, trioctyl phosphate, triphenyl phosphate, tributoxyethyl phosphate, octyl diphenyl phosphate, tricres Zyl phosphate, cresyl phenyl phosphate, trixylenyl phosphate, 2-naphthyl diphenyl phosphate, cresyl di 2,6-xylenyl Non-halogenated phosphorus flame retardants such as phosphates, aromatic condensed phosphates, mixtures of aromatic condensed phosphates and polyoxyalkylene phosphates, polyphosphonates, polyphosphates, polyphosphates, red phosphorus Trichloroethyl phosphate, tris (2-chloropropyl) phosphate, tris (2,3-dichloropropyl) phosphate, tris (2,3-dibromopropyl) phosphate, tris (bromochloropropyl) phosphate, tris Phosphorus halide flame retardants such as (tribromoneopentyl) phosphate, tris (chloropropyl) phosphate, 2,3-dibromopropyl phosphate, 2,3-chloropropyl phosphate; chlorinated paraffin, par Chlorocyclopentadecane, chlorinated bif Chlorine flame retardants such as Nyl; antimony compounds such as antimony trioxide and antimony pentoxide; aluminum hydroxide, magnesium hydroxide, calcium aluminate, zinc borate, barium metaborate, molybdenum oxide, ammonium molybdate, zirconium oxide Inorganic flame retardants such as zirconium hydroxide, tin oxide and tin hydroxide can be used alone or in combination of two or more.

  Among these, inorganic flame retardants and phosphorus halide flame retardants are preferable, and aluminum hydroxide is particularly preferable from the viewpoint of heat insulation. The average particle diameter of aluminum hydroxide is 100 μm or less, preferably 0.6 to 25 μm.

  The blending amount of the flame retardant (C) for achieving both heat insulation and flame retardancy is 10 to 300 parts by mass, preferably 20 to 100 parts by mass with respect to 100 parts by mass of the resin solid content of (A). 200 parts by weight is suitable.

<Fibrous compound (D)>
The said heat insulation coating material contains a fibrous compound (D).

  In the present invention, a fibrous inorganic compound having an aspect ratio of 1.5 to 250 and / or a fibrous organic compound having a branched structure is used as the fibrous compound (D).

Specific examples of the fibrous inorganic compound include magnesium sulfate, magnesium carbonate, calcium carbonate, glass fiber, and carbon fiber, and these can be used alone or in combination of two or more. Among them, magnesium sulfate, particularly basic magnesium sulfate (chemical formula MgSO ₄ .5Mg (OH) ₂ .3H ₂ O) is preferable.

  In the present invention, the aspect ratio of the fibrous inorganic compound is 1.5 to 250, preferably 5 to 200.

  When the aspect ratio is smaller than 1.5, the waterproof property of the heat insulating layer is insufficient. On the other hand, when the aspect ratio exceeds 250, the workability becomes insufficient, which is not preferable.

  In this specification, the aspect ratio is a value calculated by dividing the length in the extension direction by the length in the direction perpendicular to the extension direction.

  The average length of the fibrous inorganic compound in the extending direction is 1 to 100 μm, preferably 5 to 90 μm, and the average length in the direction perpendicular to the extending direction is 0.1 to 3.0 μm, preferably 0. Within the range of 2 to 2.5 μm is preferable.

  In the present invention, a hyperbranched fibrous compound is also included as the fibrous compound (C).

  Examples of such multi-branched fibrous organic compounds include fibrous organic compounds such as pulp, polyethylene fibers, and polypropylene fibers, and polyethylene fibers are suitable.

  The blending ratio of the fibrous compound (D) is usually 0.1 to 6 parts by weight, preferably 0.2 to 3 parts by weight, based on 100 parts by weight of the resin solid content of the resin emulsion (A). Is appropriate.

<Insulation coating material>
The heat insulating coating material according to the present invention may further contain a pigment component, a film forming aid, a thickening sagging inhibitor, an antifoaming agent, a dispersant, a fibrous compound other than the above (D), if necessary. Can do.

  Examples of the pigment component include colored pigments such as titanium oxide, carbon black, phthalocyanine blue, and iron oxide; extender pigments such as clay, talc, mica, silica, and calcium carbonate.

  The amount used is such that the pigment volume concentration (hereinafter sometimes abbreviated as “PVC”) relative to the resin emulsion (A) as a whole pigment component is 0.5 to 50%, preferably 1 to 30%. The

  Here, “PVC” is the volume ratio (%) of the pigment in the solid content of the resin and pigment mixture, and is calculated from the formula (volume of pigment) / (volume of pigment + volume of resin solid) × 100. It is obtained. The specific gravity of the pigment is according to “Paint Raw Material Handbook 6th Edition” (Japan Paint Manufacturers Association), and the specific gravity of the resin solid is approximately 1.

  From the viewpoint of heat insulating properties of the heat insulating coating material of the present invention, the pigment component may or may not contain carbon black at a pigment volume concentration of less than 0.5%.

<Insulated building materials>
The heat insulating building material of the present invention is such that the above heat insulating coating material is provided in a thick film on a building base material by coating.

  Although it does not specifically limit as thickness of the heat insulation layer by a heat insulation coating material, Generally it is 1-50 mm, Preferably it is 3-35 mm.

  If the thickness of the heat insulation layer is less than 1 mm, sufficient heat insulation cannot be obtained, and if it exceeds 50 mm, coating with a heat insulation coating material becomes difficult and film formation (film formation) becomes difficult, and heat insulation and waterproofness are insufficient. is there.

  Examples of the building base material surface to which the heat insulating coating material is applied include an outer wall surface, an inner wall surface, a roof surface, and the like, which may be new or existing. These building base materials may be provided with a coating film such as acrylic resin, acrylic urethane resin, polyurethane resin, fluororesin, silicon acrylic resin, and vinyl acetate resin.

  Also. Although the above-mentioned heat insulating coating material can be directly applied to the surface of these building materials, a sealer or a primer layer may be provided on the substrate surface in advance from the viewpoint of adhesion.

  The heat insulating coating material can be applied by a conventionally known method such as spraying, pouring, trowel coating, rollers, brushes, and the like.

  Moreover, in this invention, the heat insulating building material which coats a cement composition on the outdoor side of a masonry wall, and provides the heat insulation layer by the said heat insulation coating material on the surface of the formed cement layer is provided.

  A masonry wall is a wall formed by stacking blocks such as bricks, stones, and concrete.

  The cement composition is not particularly limited in terms of raw materials and composition, but is a hydraulic inorganic composition such as ordinary Portland cement, early strong Portland cement, very early strong Portland cement, moderately hot Portland cement, sulfuric acid resistant Salt Portland cement, White Portland cement, Alumina cement, Super fast cement, Expanded cement, Acid phosphate cement, Silica cement, Blast furnace cement, Fly ash cement, Keens cement, etc. Mortar and concrete are also included as cement compositions.

  Examples of the aggregate include pearlite, expanded vermiculite, pumice, ALC pulverized product, styrene resin foam, ethylene vinyl acetate resin foam, and vinyl chloride resin foam.

  The cement composition may contain a setting accelerator, a water reducing agent, a thickener, a fiber material, a dispersant, an organic resin, and the like in addition to the above components.

  For the cement layer, a kneaded material obtained by adding water to the cement composition is applied to the masonry wall and cured. This kneaded product may be applied a plurality of times as necessary. Moreover, it can also apply | coat, attaching nets, such as a metal lath.

  The thickness of the cement layer can be appropriately adjusted, but is generally about 1 to 30 mm, particularly about 2 to 20 mm, and is dried at room temperature.

  Further, when top coating is performed on the heat insulating layer, it is suitable to apply a white thermal barrier paint that forms a coating film having a solar reflectance of 75% or more as the top coating.

  This is because such a configuration improves both heat insulation and waterproofness.

  Before applying the top coat, a sealer may be applied as necessary to improve adhesion to the heat insulating coating.

The above-mentioned top coat is applied by a method such as spray, roller, brush, etc., and an application amount in the range of 150 to 3,000 g / m ² is suitable.

  EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples, but the present invention is not limited to only these examples. In the following examples, “part” and “%” mean “part by mass” and “% by mass”, respectively.

Examples 1-6 and Comparative Examples 1-2
The components shown in Table 1 were blended and mixed by stirring to obtain water-based heat insulating coating materials (X-1) to (X-6) and (Y-1) to (Y-2). (Note) in Table 1 is as follows.
(Note 1) Resin emulsion (A-1): Styrene / 2-ethylhexyl acrylate / diacetone acrylamide / methacrylic acid = 10/83/5/2 copolymer emulsion, solid content 55%
(Note 2) Resin emulsion (A-2): Styrene / 2-ethylhexyl acrylate / n-butyl acrylate / methacrylic acid = 10/40/48/2 solid content 55%
(Note 3) Expanded polystyrene particles: spherical particles having an average particle diameter of 1 mm and a bulk density of 0.04 g / cc (Note 4) Titanium oxide: specific gravity of 4.0
(Note 5) Basic magnesium sulfate: fibrous, average major axis 15 μm, average minor axis 0.5 μm
(Note 6) Chemibest FDSS-5: Multi-branched fibrous polyethylene, manufactured by Mitsui Chemicals,
(Note 7) Aluminum hydroxide, average particle size 25μm
(Note 8) Flame retardant: “CR-900” manufactured by Daihachi Chemical Co., Ltd. Bromine-containing phosphate ester containing 70% bromine and 3% phosphorus.

Each coating material was evaluated and the results are shown in Table 1.
(* 1) Thermal insulation: Spray coating was applied on a fluororesin-coated steel sheet to a dry film thickness of about 5 mm, and dried for 7 days in a constant temperature and humidity chamber at 20 ° C. and 65% RH to form a coating film. . Next, the coating film is peeled off from the fluororesin-coated steel sheet, a free coating film having a film thickness of about 5 mm is prepared, and a sample cut to 70 × 150 mm is used as a sample using “QTM-500” (manufactured by Kyoto Electronics Industry Co., Ltd.). The thermal conductivity [W / m · K] was measured to obtain heat insulation. In the table, the lower the value, the better.
(* 2) Waterproofness: Spray coating of epoxy resin primer at a coating amount of 0.1 kg / m ² on a 400 x 200 x 6 mm slate plate, drying for 16 hours in a standard state, and then applying each heat insulating coating material The test specimen was spray-coated at an amount of 1 kg / m ² and cured for 14 days. The water permeability of the obtained specimen was measured according to the procedure of JIS A 6909 7.13 “Water permeability test B method” to evaluate waterproofness.
A: Water permeability is less than 0.2 ml,
○: Water permeability is 0.2 ml or more and less than 0.5 ml,
Δ: Water permeability is 0.5 ml or more and less than 1 ml,
X: Water permeability is 1 ml or more.
(* 3) Flame retardancy: A candle flame was brought close to the test body used for the waterproof property, and evaluated according to the following criteria.
A: No burning at all
○: Ignites but digests immediately without spreading.
Δ: ignited and continues to burn slowly,
X: Ignition and burning continue vigorously.
(* 4) Crack resistance: Separately create a test specimen similar to the one used for the above-mentioned waterproofness, and immerse in water (23 ° C) 18 hr → -20 ° C x 3 hr → 50 ° C x 3 hr as one cycle. The coating film appearance was confirmed after a total of 10 heating / cooling cycle tests.
◎: There is no crack.
X: Cracking remarkably occurred (* 5) Coating workability: The coating workability of each heat insulating coating material when the test body used for the above waterproofness was prepared was evaluated according to the following criteria.
A: Good,
○: Can be painted without hindrance,
△: Difficult to paint,
X: Unsuitable for painting.

<Insulating outer wall>
A heat insulating outer wall according to the present invention is shown in FIG. In FIG. 1, the cement layer has a thickness of 10 mm, the heat insulating layer has a thickness of 5 mm, and the finishing layer has a thickness of 60 μm. Here, a water-based thermal barrier paint for outer walls having a solar reflectance of about 80% (white) is applied. used.

FIG. 1 is an example of a schematic view of a heat insulating outer wall according to the present invention.

1: Interior material (interior coating layer on cement layer)
2: Wall of brick masonry structure 3: Cement layer 4: Thermal insulation layer 5: Finishing layer

Claims (6)

A flame retardant comprising a synthetic resin emulsion (A) having an acrylate containing an alkyl group having 4 or more carbon atoms as a copolymerization component , hollow particles (B), a flame retardant (C) and a fibrous compound (D) The compounding amount of the chemical compound (C) is in the range of 10 to 300 parts by mass with respect to 100 parts by mass of the resin solid content of the synthetic resin emulsion (A), and the fibrous compound (D) has an aspect ratio of 1. A heat-insulating coating material, characterized by being a 5-250 fibrous inorganic compound. A synthetic resin emulsion having a coating type heat insulating layer, wherein the heat insulating coating material for forming the coating type heat insulating layer comprises an acrylate containing an alkyl group having 4 or more carbon atoms as a copolymerization component ( A), hollow particles (B), flame retardant (C) and fibrous compound (D), the fibrous compound (D) is a fibrous inorganic compound having an aspect ratio of 1.5 to 250 Insulated building material characterized by that. The heat insulation building material which forms a heat insulation layer by apply | coating a cement composition to the outdoor side of a masonry wall, and apply | coating the heat insulation coating material of Claim 1 or 2 to the surface of the formed cement layer. The heat insulating building material according to claim 2 or 3, further comprising a white heat shielding layer having a solar reflectance of 75% or more on the heat insulating layer. A building constructed using the heat insulating building material according to any one of claims 2 to 4. A building refurbishing method using the heat insulating coating material according to claim 1.

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