JPH10152648A - High-buildup elastic heat-insulation coating material and work of heat insulation coating therewith - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high-buildup elastic heat insulation coating material which can form a coating film having heat insulation properties and sound- deadening properties and is especially desirable for interior and exterior finishing of the wall of a structure and to provide a work of heat insulation coating therewith. SOLUTION: This material comprises an elastic resin emulsion (A) prepared by dispersing a resin having a glass transition temperature of 30 deg.C or below and a film-forming temperature of 25 deg.C or below in water, resin foam particles (B) having a heat conductivity of 0.02-0.1kcal/m.h.C and a bulk density of 0.02-0.5g/cc and a particle diameter of 0.2-8mm and a pigment (C) in such amounts that the A/B ratio is 10/50 to 100/500 by volume of the solid matter, and the C/A ratio is 1-50% (in terms of the volume concentration of the pigment). A substrate is coated with this material and then optionally finish-coated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paint capable of forming a coating film having heat insulation and sound deadening properties, and more particularly to a thick film type elastic heat insulation paint suitable for interior and exterior finishing of a building wall and coating using the same. Related to thermal insulation method.

[0002]

2. Description of the Related Art Conventionally, in order to control a temperature change inside a building, it has been widely practiced to arrange a heat insulating member such as a styrene foam or a glass wall on the inner and outer surfaces of a building wall. ing. On the other hand, as a coating material for imparting heat insulation, a material using an inorganic or organic fine foam or a fine hollow foam as an aggregate is known. As a coating material imparting such heat insulating properties, for example, a film forming temperature of 1
A resin composition for forming an elastic film containing a resin emulsion at 0 ° C. or lower, a hydraulic cement, and resin foam particles (JP-A-60-94470) has been proposed.
According to the composition, a thick film having elasticity can be formed. However, since it contains a cement component, it hardens in a few hours. Therefore, it is necessary to store two liquids, and it is necessary to adjust the required amount each time. There is a problem that it takes time. Also,
When an inorganic aggregate was used as the aggregate, the hollow foam was liable to be broken, so that the heat insulating property was likely to be reduced.

[0003]

Means for Solving the Problems The present inventors have conducted intensive studies to solve the above-mentioned problems, and as a result, the coating material containing the resin emulsion, the resin foam particles and the pigment having the specific properties has a heat insulating property and a sound-deadening property. The present inventors have found that a coating film having excellent properties can be formed, and have reached the present invention.

That is, the present invention relates to (A) a glass transition temperature of 30
And an elastic resin emulsion obtained by dispersing a resin having a film forming temperature of 25 ° C. or lower in water, and (B) a thermal conductivity of 0.
At a bulk density of 0.0 to 0.1 kcal / m · h · ° C.
The resin foam particles having a particle size of 2 to 0.5 g / cc and a particle size of 0.2 to 8 mm, and the pigment (C) are prepared by mixing (A) / (B) with a solid content volume ratio of 100/50 to 100/500. And (C) a coating material containing the pigment at a volume concentration of 1 to 50% with respect to (A), wherein the thermal conductivity of the coating film formed from the coating material is 0.3 Kcal / m · h · ° C. or less. It is intended to provide a thick-film elastic heat-insulating coating material characterized by the above-mentioned feature, and a coating heat-insulating method in which the thick-film elastic heat-insulating coating material is applied to a substrate surface.

Hereinafter, the present invention will be described in detail.

[0006] The elastic resin emulsion (A) used in the present invention has a glass transition temperature of 30 ° C or lower, preferably -20 to 20 ° C, and a film forming temperature of 25 ° C or lower, preferably -10 to 20 ° C. Is a resin emulsion obtained by dispersing the resin in water.

As the resin, for example, an acrylic resin,
Vinyl acetate resin, vinyl chloride resin, styrene / butadiene resin, epoxy resin, alkyd resin, polyester resin, silicon resin, fluorine resin, polyurethane resin, acrylic urethane resin (including two-pack type) And the like, and these can be used alone or in combination of two or more. Particularly, as a resin emulsion, in the case of a non-crosslinked system, a (co) polymer obtained by emulsion polymerization of one or more vinyl monomers selected from alkyl (meth) acrylate, styrene, vinyl acetate, unsaturated acid and the like. Emulsions are preferred, and in the case of a crosslinked system, a crosslinked emulsion containing a carbonyl group-containing acrylic (co) polymer and a hydrazine compound (see, for example,
And the combined use of the emulsion and an aqueous polyurethane resin (for example, JP-A-5-339542).
Is preferred from the viewpoint of drying properties and the like.

If the glass transition temperature of the resin exceeds 30 ° C., the elasticity of the resulting heat-insulating coating film becomes poor, and coating defects such as cracks occur. When the film formation temperature is 25
If the temperature exceeds ℃, coating defects such as cracks are likely to occur.

The resin emulsion (A) is preferably adjusted so that the heating residue is 50% by weight or more.
If the heating residue is less than 50% by weight, the volume decrease during the formation of the heat-insulating coating film becomes large, and coating defects such as cracks occur, which is not preferable.

The resin foam particles (B) used in the present invention
Is a thermal conductivity of 0.02 to 0.1 kcal / m · h · ° C.
Preferably 0.02 to 0.08 kcal / m · h · ° C.
The particles have a bulk density of 0.02 to 0.5 g / cc, preferably 0.02 to 0.1 g / cc, and a particle size of 0.2 to 8 mm, preferably 0.5 to 5 mm. Specific examples include foamed polystyrene particles, foamed polyethylene particles, foamed polypropylene particles, foamed polyurethane, and other resin foam particles, and those obtained by subjecting these resin foam particles to various known surface treatments. These may be spherical or crushed. The resin foam particles (B)
When the thermal conductivity exceeds 0.1 kcal / m · h · ° C., the heat insulating effect of the obtained coating film is reduced, which is not preferable, and when the bulk density exceeds 0.5 g / cc, weight reduction is impaired. Thick film coating becomes difficult, and if it is less than 0.02 g / cc, the resin foam particles float on the surface of the coating liquid during storage, and the uniformity of the coating liquid is undesirably impaired. In addition, the particle diameter is 8 m
If it exceeds m, it will hinder painting work such as spraying,
When the thickness is less than 0.2 mm, the surface area of the resin foam particles increases, and the viscosity of the coating increases, which is not preferable.

In the present invention, the above resin foam particles (B)
The solids volume ratio of the resin emulsion (A) / resin foam particles (B) is 100/50 to 100/5.
00, preferably 100/100 to 100/450. If the amount of the resin foam particles (B) is less than this, the heat insulation, sound insulation and thick film properties of the resulting coating film become insufficient, and if it is too large, the binder content decreases and the coating film strength decreases. It is not preferable.

The pigment (C) used in the present invention includes:
Conventionally known pigments can be used, and examples thereof include coloring pigments such as titanium oxide, carbon black, phthalocyanine blue, and iron oxide; extenders such as clay, talc, mica, silica, and calcium carbonate.

In the present invention, the pigment (C) is a pigment volume concentration (hereinafter referred to as “PV”) with respect to the resin emulsion (A).
C ") in a proportion of 1 to 50%, preferably 10 to 50%. Here "PVC"
Is the volume ratio (%) of the pigment content to the solid content of the mixture of the resin and the pigment, and is (volume of the pigment content) / (volume of the pigment content +
(Volume of resin solid content) × 100. If the PVC is less than 1%, the strength of the resulting heat-insulating coating film is insufficient, while if it exceeds 50%, the flexibility of the heat-insulating coating film is impaired, making it unfavorable.

The above resin foam particles (B) and pigments (C)
Further, if necessary, a conventionally known aggregate may be used in combination. Aggregates include, for example, pearlite, volcanic rubble, bar
Inorganic fine foams such as calcined miculite, fine hollow foams such as shirasu balloon, glass balloon, silica balloon, and the like are included, and the mixing ratio thereof is usually based on the weight of the solid content of the resin emulsion (A). On the other hand, 10% by weight or less is appropriate.

The heat-insulating coating material of the present invention may further contain a film-forming aid, a thickening anti-sagging agent, an antifoaming agent, a dispersant, a flame retardant, a fibrous substance, etc., if necessary. . Of these, fibrous substances are used to speed up drying of the coating and improve the strength of the coating, such as magnesium sulfate, polyethylene, pulp, magnesium carbonate, calcium carbonate, nylon, vinylon, glass fiber, and carbon fiber. In particular, an inorganic fibrous substance can contribute to flame retardancy. Usually, the proportion of the fibrous substance is suitably 5% by weight or less based on the weight of the solid content of the resin emulsion (A).

The heat-insulating coating material of the present invention obtained as described above has a thermal conductivity of 0.3 Kcal / m · h · ° C.
Below, it is essential that it is preferably 0.2 Kcal / m · h · ° C. or less, more preferably 0.15 Kcal / m · h · ° C. or less. Thermal conductivity of coating film is 0.3Kcal
If it exceeds / m · h · ° C., the heat insulating property becomes insufficient, which is not preferable.

Next, the present invention provides a coating and heat insulating method in which the above-mentioned heat insulating coating material is coated on a substrate surface. In the method of the present invention, the heat-insulating coating material may be used for finishing with only the heat-insulating coating film, or the coating film may be overcoated.

The substrate to which the method of the present invention is applied includes concrete, mortar, and slates; ceramics such as ceramics and tiles; material surfaces such as plastics, woods, stones, and metals; Acrylic resin system provided,
An old coating film surface of an acrylic urethane resin system, a polyurethane resin system, a fluorine resin system, a silicon acrylic resin system, a vinyl acetate resin system, or the like can be given, and it is desirable to appropriately adjust the substrate.

The above-mentioned heat-insulating coating material can be applied directly to the substrate surface, but a sealer or primer layer may be provided on the substrate surface in advance from the viewpoint of adhesiveness. These are applied to the base material as necessary, and improve adhesion between the base material and the heat insulating coating, prevent effusion from the base material, prevent uneven suction of the heat insulating coating film by the porous base material, and the like. Used for purposes. Specifically, for example, a sealer or primer having one or a combination of two or more resin components selected from acrylic resin, vinyl chloride resin, vinyl acetate resin, epoxy resin, and chlorinated rubber. Is mentioned. In places where a high degree of water resistance is required, such as around water, it may be applied as needed.

Next, the above heat-insulating coating material is applied directly to a substrate or onto a sealer or a primer coating film. The coating of the heat-insulating coating material can be performed by a conventionally known method such as spraying, pouring, ironing, roller, or brush. The thickness of the heat-insulating coating film formed on the substrate surface can be appropriately selected depending on the required heat-insulating performance, and is usually about 3 to 10 mm.

The heat-insulating coating film can be provided as an elastic coating film for the purpose of forming a three-dimensional texture, following a crack on the surface of the base material, concealing, and the like. The texture can be applied by using a known applicator so as to be uneven. Further, after the application, it can be finished smoothly by the pressing method.

Further, when a top coat is applied on the above-mentioned heat-insulating coating film, as the top coating film, adhesion to the heat-insulating coating film, the function of the intermediate coating film, coloring and gloss of the finished surface, weather resistance, water resistance, For both the purpose of imparting stain resistance and the like,
After applying the undercoating adjusting material, a topcoat paint may be applied, or both may be applied with a topcoat paint, or only the topcoat paint may be applied.

In order to provide this function, even when only the coating is applied, the coating applied on the heat-insulating coating is an elastic coating having an elongation of 20% or more at 20 ° C. atmosphere in the coating. Is preferred. Here, the elongation percentage of the coating film is a value measured at a pulling speed of 200 mm / min at 20 ° C. using a universal tensile tester equipped with a thermostat (manufactured by Shimadzu Corporation; Autograph AG2000B type). The sample to be prepared was prepared in accordance with JIS-A-6909.

If the elongation is less than 20%, the surface of the overcoat film is undesirably cracked or peeled over time due to the difference in elasticity with the heat-insulating coating film.

When the heat insulating coating contains a very low solvent resistance component such as expanded polystyrene particles, the coating applied directly on the heat insulating coating is preferably an aqueous coating.

The base adjustment material imparting only the above-mentioned functions is a microelastic coating material having a function of an intermediate coating on a heat-insulating coating film.
Desirably, it is 100%. For example, a coating material such as a synthetic resin emulsion such as a reaction-curable acrylic emulsion or a polymer-cement is used.

The above-mentioned topcoat paint is not particularly limited, and is a water-based or organic solvent-based paint capable of imparting coloring and gloss of a finished surface and imparting high weather resistance, water resistance, stain resistance and the like. Can be applied, for example, acrylic resin,
A main component is an acrylic / urethane resin, a polyurethane resin, a fluororesin, a silicone / acrylic resin, or the like, and a pigment or a paint additive.

The top coat having both of them is mainly composed of the same resin emulsion as the component (A) described in the description of the heat-insulating coating material such as acrylic latex or rubber latex, and includes pigments and additives for paint. Agent, etc.,
These are obtained by dispersing them in water, and examples thereof include a thick film type elastic overcoating material having an elongation percentage of a formed coating film of 100 to 700% in a 20 ° C atmosphere. The overcoat may be either a single-layer type or a multi-layer type. Prior to the application of the top coat, a sealer may be applied as necessary to improve the adhesion to the heat insulating coating.

Among these overcoating systems, it is preferable to use a thick-film elastic paint having both of them, particularly a single-layer thick-film elastic paint, from the viewpoints of heat insulation and economy. .

[0030] The above top coat is applied by spraying, ro
200 to 3,000 g / m ^{2 by} a method such as brushing or brushing.
Is suitable.

[0031]

EXAMPLES Hereinafter, the present invention will be described in more detail with reference to examples.

Examples 1 to 8 and Comparative Examples 1 to 5 The components shown in Table 1 were blended and mixed by stirring to obtain each of the water-based heat insulating coating materials. (Note 1) to (Note 9) in Table 1 are as follows.

(Note 1) A-1: Aqueous emulsion of acrylic / styrene copolymer having a glass transition temperature of 9 ° C. and a film-forming temperature of 15 ° C., solid content 55% (Note 2) A-2: Glass transition temperature of 33 ° C. , Film formation temperature 15
Aqueous emulsion of vinyl acetate resin at 65 ° C, solid content 65
% (Note 3) A-3: glass transition temperature 20 ° C, film formation temperature 15
C. Aqueous emulsion containing a carbonyl group-containing acrylic copolymer at .degree. C. and a cross-linked emulsion containing adipic dihydrazide as a cross-linking agent, solid content 55%. (Note 4) Expanded polystyrene particles: manufactured by Mitsubishi Chemical Corporation, thermal conductivity 0.03 Kcal / m · h · ° C, ball diameter 0.5-3
mm, spherical particles with a bulk density of 0.04 g / cc (Note 5) Expanded polystyrene particles: manufactured by Mitsubishi Chemical Corporation, thermal conductivity 0.03 Kcal / m · h · ° C., particle diameter 0.2 to
8 mm, crushed product with bulk density of 0.04 g / cc (* 6) Titanium oxide: manufactured by Teica, specific gravity 4.0 (* 7) Cray: manufactured by Shiraishi Calcium, specific gravity 2.65 (* 8) Magnesium sulfate: Ube Industries, Ltd., fibrous, specific gravity 2.3 (Note 9) Cement: ordinary Portland cement (Note 10) Thickener: "ADEKANOL UH-420", Asahi Denka Co., Ltd. (Note 11) Defoamer: "SN Deformer-A-63", manufactured by San Nopco Co. (Note 12) Dispersant: "Nopco Space 44C", manufactured by San Nopco Coating materials obtained as described above are dried on a Teflon resin-coated steel sheet to obtain a dry film thickness. Spray paint to about 5mm at 20 ℃
-It dried in a 65% RH constant temperature and humidity room for 7 days to form a coating film. Next, the coating film was peeled off from the Teflon resin-coated steel sheet to form a free coating film having a thickness of about 5 mm. This free
The specific gravity and thermal conductivity of the coating film were examined, and the results are shown in Table 1.

An aqueous sealer ("Aqua G Sealer", manufactured by Kansai Paint Co., Ltd., trade name) is applied on the plate.
On the dried test plate, the viscosity of each coating material obtained as described above was adjusted to 15,000 to 20,000 cps with tap water, and spray-coated to a dry film thickness of about 5 mm.
The film was dried in a thermo-hygrostat at 0 ° C. and 65% RH for 7 days to form a coating film. Each coating material of the example was capable of not only a smooth finish but also a lysine-like finish. Next, each coating material and the obtained test coated plate were subjected to the following performance tests. Table 1 shows the results.

(* 1) Thermal conductivity (Kcal / m · h ·
° C): It measured using "Kemtherm QTM-D3" (manufactured by Kyoto Electronics Industry Co., Ltd.) as a sample obtained by cutting a free coating film into 70 x 150 mm.

(* 2) Spraying workability: For each coating material,
The coating workability was examined using a ricin gun, a tile gun, and a stucco gun, respectively. ○ indicates that the spraying can be performed without any problem with all the guns, △ indicates that the atomization of the coating material is bad and the working time is required, and X indicates that the spraying is impossible. (* 3) Thick coating property: For each coating material, it was examined whether or not thick coating of 3 mm (by dry film thickness) or more was possible by one spray coating. ○: 3 mm or more, Δ: 1-3 mm, ×: 1 mm
Indicates less than.

(* 4) Pot life: each coating material was washed with clean water for 15,
The service limit time after adjusting the viscosity to 2,000 to 20,000 cps was examined.

(* 5) Adhesion of coating film surface: The presence or absence of adhesion when the finger touched the coating film surface of the test coated plate was examined.は indicates no stickiness, △ indicates slightly sticky, and × indicates considerably sticky.

(* 6) Hot / cold cycle test: Test coated plate
<Immersion in water for 18 hours—cooling in a −20 ° C. incubator for 3 hours—according to the repeated heating and cooling test of IS A 6909
Heating in a thermostat at 50 ° C for 5 hours>
The state of the coating film surface after the 0 cycle test was visually evaluated. ○
Indicates that there is no abnormality on the coating surface, and indicates that
X indicates that swelling is slightly observed, and x indicates that cracks, peeling and swelling are remarkably observed on the coating film surface.

(* 7) Weather resistance: The state of the coating film after the test for 1000 hours was visually observed using a sunshine weatherometer. ○ indicates no cracks, peeling, or swelling on the coating surface, △ indicates no cracks, peeling, or swelling on the coating surface, but a slight decrease in gloss is observed. Is recognized.

[0041]

[Table 1]

Examples 9 to 20 and Comparative Examples 6 to 10 An aqueous sealer ("Ares G Sealer",
Each of the heat-insulating coating materials obtained as described above was applied to a test plate on which a test plate coated with Kansai Paint Co., Ltd. and dried) was washed with water for 15.0.
Adjust the viscosity to 00-20,000 cps and apply
kg / m ² spray coating, 20 ℃ 65%
After left in a constant temperature and humidity room of RH for 1 day, each top coat was applied in the combination and in the order of the top coat shown in Table 2 in the application amount shown in the table, and the temperature and humidity were kept at 20 ° C. and 65% RH. The coated plate was obtained by drying in a room for 7 days. In Comparative Examples 8 and 9, the test plates were directly coated with the overcoating shown in Table 2 without coating the heat insulating coating material. Further, when the top coat of e was applied on the heat-insulating coating film of Example 1, the heat-insulating coating film was dissolved and the film could not be formed.

The top coatings a to n shown in Table 2 are as follows.

A. "ARETH HOLDER-GII": water-based base conditioner, manufactured by Kansai Paint Co., Ltd., trade name, elongation percentage of formed coating film 6
0% b. "Avanteria": Aqueous thick film type single-layer elastic overcoat, low contamination type, manufactured by Kansai Paint Co., Ltd., trade name, elongation percentage of formed coating film 350% c. "Ales rubber tile rough": acrylic rubber-based multilayer material, waterproof type, manufactured by Kansai Paint Co., Ltd., trade name, elongation percentage of formed coating film 300% d. "Are style rough": Acrylic emulsion-based multi-layer main material, manufactured by Kansai Paint Co., Ltd., trade name, elongation percentage of formed coating film 1% e. "Aressellaretan": Solvent type acrylic urethane resin-based top coating, non-staining type with silicate compound, manufactured by Kansai Paint Co., Ltd., trade name, elongation percentage of formed coating film 30% f. "Aqualetan": water-based acrylic urethane resin-based top coating, manufactured by Kansai Paint Co., Ltd., trade name, elongation percentage of formed coating film 100% g. "Ales Rubber Tile Top U": Solvent type acrylic urethane resin-based clear paint, flexible type, manufactured by Kansai Paint Co., Ltd., trade name, elongation percentage of formed coating film 200% h. "Ales Aqua Gloss": water-based acrylic resin top coating, manufactured by Kansai Paint Co., Ltd., trade name, elongation percentage of formed coating film 120% i. "Ares Aqua Silicone AC": water-based acrylic silicone resin-based overcoat, manufactured by Kansai Paint Co., Ltd., trade name, elongation percentage of formed coating film 150% j. "O-defresh F-100": water-based fluororesin top coat, manufactured by Nippon Paint Co., Ltd., k. "Ales Avanteria Deco": Aqueous thick film type single layer elastic overcoat (for ball blowing), low contamination type, manufactured by Kansai Paint Co., Ltd., trade name, elongation percentage of formed coating film 350% l. "Arescela mild urethane": Tar-pen soluble polyurethane resin-based overcoat, manufactured by Kansai Paint Co., Ltd., trade name, elongation of formed coating 40% m. "Ales Cera Mild": Tar-pen soluble non-aqueous dispersion type acrylic resin top coating, manufactured by Kansai Paint Co., trade name, elongation percentage of formed coating film 80% n. "Ales Serafusso": Solvent type non-aqueous dispersion type fluororesin top coat, manufactured by Kansai Paint Co., Ltd., trade name, elongation percentage of formed coating film 100%. Next, the obtained coated plate was subjected to the following performance tests. Table 2 shows the results.

(* 8) Thermal conductivity (Kcal / m · h ·
° C): Each of the heat-insulating coating materials and the topcoat is applied on a Teflon resin-coated steel sheet according to each example as described above.
The film was dried in a constant temperature and humidity room of RH for 7 days to form a coating film. Next, the coating film was peeled off from the Teflon resin-coated steel sheet to prepare each free coating film. 70 × 150 m
m and cut into a sample, and “KemthermQTM-D
3 "(manufactured by Kyoto Electronics Industry Co., Ltd.).

(* 9) Appearance of coating film: The state of the surface of the coating film after overcoating of each coated plate was visually observed. ○ indicates no abnormality,
× indicates that there is a defect such as cracks or blemishes.

(* 10) Heating / cooling cycle test: Each coated plate was tested according to the JIS A 6909 hot / cold repetition test according to <
After 18 cycles of immersion in water, cooling for 3 hours in a thermostat at −20 ° C., and heating for 5 hours in a thermostat at 50 ° C.>, the state of the coating film surface after a 10-cycle test was visually evaluated.
○ indicates no cracks or discoloration on the coating film surface, and no discoloration is recognized. × indicates cracks, discoloration or discoloration on the coating film surface.
Is shown.

(* 11) Stain resistance: Each coated plate was faced to the south in Hiratsuka city, the coated surface was inclined upward at 30 degrees, and the coated film surface was visually observed after being left outdoors for 6 months. did. ◎ indicates almost no stain, ○ indicates slight stain, Δ indicates stain, and X indicates significant stain.

(* 12) Weather resistance: The state of the coating film after the test for 1000 hours was visually observed using a sunshine weatherometer. ○ indicates no crack, peeling or blistering on the coating surface, Δ indicates no cracking or peeling or blistering on the coating surface, but a slight decrease in gloss is recognized, × indicates cracking on the coating surface・ Indicates that Hagarekule is recognized.

[0050]

According to the present invention, by containing a resin emulsion having specific properties, resin foam particles and a pigment, there is no restriction on the coating work, and the heat insulation and the sound deadening properties are excellent. A coating film can be formed.

[0051]

[Table 2]

──────────────────────────────────────────────────続 き Continued on front page (51) Int.Cl. ⁶ Identification code FI C09D 7/12 C09D 7/12 Z

Claims (5)

[Claims] 1. An elastic resin emulsion obtained by dispersing a resin having a glass transition temperature of 30 ° C. or lower and a film forming temperature of 25 ° C. or lower in water, and (B) a thermal conductivity of 0.02 to 0.1.
At kcal / m · h · ° C., bulk density 0.02 to 0.5 g
/ Cc, resin foam particles having a particle size of 0.2 to 8 mm,
And (C) a pigment having a solid content volume ratio of (A) / (B) of 1
A coating material containing 00 / 50-100 / 500 so that the pigment volume concentration of (C) with respect to (A) is 1-50%, and the thermal conductivity of a coating film formed by the coating material is 0.3 Kcal /
A thick-film elastic heat-insulating coating material having a temperature of m · h · ° C. or less. 2. The method according to claim 1, wherein (A) a glass transition temperature of 30 ° C.
Hereinafter, an elastic resin emulsion obtained by dispersing a resin having a film formation temperature of 25 ° C. or lower in water, and (B) a thermal conductivity of 0.0
2 to 0.1 kcal / m · h · ° C., bulk density 0.02
To 0.5 g / cc, resin foam particles having a particle diameter of 0.2 to 8 mm, and (C) a pigment having a solid content volume ratio of (A) / (B) of 100/50 to 100/500, And (C)
(A) is a coating material containing the pigment at a volume concentration of 1 to 50%, and the thermal conductivity of a coating film of the coating material is 0.3%.
A coating heat insulation method in which a thick film type elastic heat insulating coating material having a Kcal / m · h · ° C. or less is applied. 3. The method according to claim 2, wherein a top coat is applied on the heat-insulating coating film using the thick-film elastic heat-insulating coating material. 4. The method according to claim 3, wherein the paint applied on the heat-insulating coating at the time of top-coating is an elastic coating having an elongation of 20% or more in a 20 ° C. atmosphere. 5. The method according to claim 3, wherein the overcoat is a thick-film single-layer elastic overcoat having an elongation of 100 to 700% in a 20 ° C. atmosphere.