JPH10265722A - Thick film-form elastic heat-insulating coating material and coating heat-insulating technique using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a thick film-forming elastic heat-insulating coating material capable of forming a coating film having heat-insulating property and flame retardance and especially suitable for exterior finishing of building wall face and a coating heat-insulating technique using the coating material. SOLUTION: This thick film-forming elastic heat-insulating coating material contains (A) an elastic resin emulsion obtained by dispersing a resin having <=30 deg.C glass transition temperature and <=25 deg.C film-forming temperature into water, (B) resin foam particles having 0.02-0.1 kcal/m.h. deg.C heat conductivity and 0.02-0.5 g/cc bulk density and 0.2-8 mm particle diameter and (C) aluminum hydroxide having <=100 μm particle diameter, at a volume ratio of solid content of components A/B of (100/50) to (100/500) and at a rate of the component C in an amount of 20-100 pts.wt. based on 100 pts.wt. resin solid content of the component A. Further, the coating material may contain a bromine- containing phosphate and a basic magnesium sulfate.

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 heat-insulating and flame-retardant coating film, and more particularly to a thick-film type elastic heat-insulating coating material suitable for exterior finishing of a building wall and using the same. It relates to the paint 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. In addition, as a coating material for imparting heat insulating properties, a material using an inorganic or organic fine foam or a fine hollow foam as an aggregate is known.

[0003] As a coating material for imparting such heat insulating properties, for example, a resin composition for forming an elastic film containing a resin emulsion having a film forming temperature of 10 ° C. or less, a hydraulic cement, and resin foam particles (particularly, 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.

In addition, when inorganic aggregate is used as the aggregate, the hollow foam is liable to be broken, so that the heat insulating property tends to be reduced. When an organic foam is used, the fire spreads in a fire. Was concerned.

[0005]

Means for Solving the Problems The present inventors have conducted intensive studies to solve the above problems, and as a result, a coating material containing specific amounts of a resin emulsion, resin foam particles and aluminum hydroxide having specific properties has been obtained. The present inventors have found that a coating film having excellent heat insulating properties and flame retardancy can be formed, and have reached the present invention.

That is, the present invention relates to (A) a glass transition temperature of 30
Elastic resin emulsion obtained by dispersing a resin having a film forming temperature of 25 ° C. or lower in water, (B) a thermal conductivity of 0.02
~ 0.1kcal / m · h · ° C, bulk density 0.02-
0.5 g / cc, resin foam particles having a particle diameter of 0.2 to 8 mm, and (C) aluminum hydroxide having a particle diameter of 100 μm or less were mixed with a solid content volume ratio of (A) / (B) of 100 /
50-100 / 500, and the resin solid content of (A) 10
It is intended to provide a thick-film elastic heat-insulating coating material characterized by containing 20 to 100 parts by weight of (C) with respect to 0 parts by weight, and a coating heat-insulating method using the same.

Hereinafter, the present invention will be described in detail.

[0008] 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.

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 resin foam particles such as expanded polystyrene particles, expanded polyethylene particles, expanded polypropylene particles, and expanded polyurethane. When the thermal conductivity of the resin foam particles (B) exceeds 0.1 kcal / m · h · ° C., the heat insulating effect of the obtained coating film is reduced, which is not preferable, and the bulk density is 0.5 g / cc. If the ratio is more 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 impaired. Further, when the particle diameter exceeds 8 mm, coating work such as spraying is hindered, and 0.2 mm
If it is less than 10%, the surface area of the resin foam particles increases, so that the viscosity of the paint increases, which is not preferable.

The resin foam particles (B) may contain a brominated flame retardant from the viewpoint of imparting self-extinguishing properties. Examples of the brominated flame retardant include tetrabromoethane, hexabromooctane, hexabromocyclododecane, tris (2,3-bromopropyl) phosphate and the like.

The blending amount of the resin foam particles (B) is such that the solid content volume ratio of the resin emulsion (A) / resin foam particles (B) is 100 / 50-100 / 500, preferably 100 / 100-500. It is contained so as to be 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 aluminum hydroxide (C) used in the present invention has an average particle size of 100 μm or less, preferably 0.6 to 25 μm, and is blended as a flame-retardant filler. Desorption of crystallization water is effective for flame retardation. If the average particle size exceeds 100 μm, the gloss and flame retardancy of the resulting coating film are undesirably reduced.

In the present invention, the amount of the aluminum hydroxide (C) is 20 to 100 parts by weight, preferably 30 to 80 parts by weight, based on 100 parts by weight of the resin solid content of the above (A).
Parts by weight. When the amount is less than 20 parts by weight, the self-extinguishing property becomes insufficient. On the other hand, when the amount exceeds 100 parts by weight, the flexibility of the coating film cannot be obtained, and cracking and peeling occur.

As the pigment component, another pigment may be used in combination with the above-mentioned aluminum hydroxide (C). Examples of other pigments include coloring pigments such as titanium oxide, carbon black, phthalocyanine blue, and iron oxide; extenders such as clay, talc, mica, silica, and calcium carbonate. The amount of the pigment used is such that the pigment component concentration (hereinafter sometimes abbreviated as “PVC”) with respect to the resin emulsion (A) is 1 to 1 as a whole pigment component including (C).
It is blended so as to be 50%, preferably 10 to 50%. Here, “PVC” is a volume ratio (%) of the pigment in the solid content of the mixture of the resin and the pigment, and is expressed by a formula of (volume of the pigment) / (volume of the pigment + volume of the resin solid) × 100. It is obtained. 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.

If necessary, a conventionally known aggregate may be used in combination. Examples of the aggregate include inorganic fine foams such as pearlite, volcanic rubble, and vermiculite fired material,
Fine hollow foams such as shirasu balloon, glass balloon, silica balloon and the like can be mentioned, and the compounding ratio thereof is usually 10 to the weight of the solid content of the resin emulsion (A).
% By weight or less is appropriate.

In the present invention, if necessary, a brominated phosphoric acid ester can be used as a flame retardant, particularly at a melting point of 150 ° C. or higher, preferably 170 to 250 ° C., and a bromine content of 50%.
% By weight or more, preferably 50 to 80% by weight, of a brominated phosphoric acid ester and / or a condensate thereof. Examples of the brominated phosphoric acid ester include, for example, those having 5 carbon atoms.
Tris (tribromoalkyl) phosphate having the above-mentioned branched alkyl group and condensates thereof;
Of these, tris (tribromoneopentyl) phospho-
And / or condensates thereof are preferred.

The content of the brominated phosphoric acid ester is suitably 100 parts by weight or less, preferably 10 to 40 parts by weight, based on 100 parts by weight of the resin solids of the resin emulsion (A). If the content exceeds 100 parts by weight, the flexibility of the heat-insulating coating film is impaired and becomes brittle, which is not desirable.

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, it is preferable to contain basic magnesium sulfate from the viewpoints of flame retardancy and finish.

Basic magnesium sulfate is synthesized by a hydrothermal reaction using magnesium hydroxide and magnesium sulfate as main raw materials, and is usually in the form of long fibers. Desorption of crystallization water effectively acts on flame retardancy. The mixing ratio is usually 100% of the resin solid content of the resin emulsion (A).
6 parts by weight or less, preferably 0.6 to 3 parts by weight with respect to parts by weight is appropriate.

The heat-insulating coating film 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 heat insulation method comprising coating the above-mentioned heat insulating coating material 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 base material 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, wood, 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 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 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 the cracks on the base material surface, 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 in a 20 ° C. atmosphere in the formed 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.

When the elongation is less than 20%, cracks and peeling occur with time on the surface of the overcoated film due to a difference in elasticity with the heat-insulating coated film, which is not preferable.

When the heat-insulating coating contains a very low solvent-resistant 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 functions is a microelastic coating material having a function of an intermediate coating on a heat-insulating coating film, and the formed coating film has an elongation of 20 to 20 ° C. in an atmosphere of 20 ° C.
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 contains 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, urethane resin-based water-based paints having the above-mentioned properties, thick film type elastic paints having both the above-mentioned properties, especially from the viewpoint of heat insulating properties and economy, etc. It is preferable to use a film type elastic paint.

The coating of the above top coat is performed by spraying,
200 to 3,000 g / m ^{2 by} a method such as brushing or brushing.
Is suitable.

[0038]

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

Examples 1 to 7 and Comparative Examples 1 to 8 The components shown in Table 1 were blended and mixed with stirring to obtain each of the water-based heat insulating coating materials. (Note 1) to (Note 13) 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 20 ° C. , Film formation temperature 15
Crosslinked emulsion containing carbonyl group-containing acrylic copolymer aqueous emulsion at ℃ and adipic dihydrazide as crosslinking agent, solid content 55%. JQ ", thermal conductivity 0.
Spherical particles having a caliper of 03 Kcal / m · h · ° C., a sphere diameter of 0.5 to 3 mm, and a bulk density of 0.04 g / cc (Note 4) Expanded polystyrene particles: trade name “Styropor JF” manufactured by Mitsubishi Chemical BISF Corporation , Thermal conductivity 0.
03 Kcal / m · h · ° C., spherical particles having a sphere diameter of 0.5 to 3 mm and a bulk density of 0.04 g / cc, JIS A-951
1 compatible product (Note 5) Titanium oxide: manufactured by Teica, specific gravity 4.0 (Note 6) Cray: manufactured by Shiraishi Calcium Co., specific gravity 2.65 (Note 7) Basic magnesium sulfate: manufactured by Ube Chemical Company, fibrous , Specific gravity 2.3 (Note 8) Aluminum hydroxide: Showa Denko KK, average particle diameter 25 μm (Note 9) Aluminum hydroxide: Showa Denko KK, average particle diameter 100 μm (Note 10) Flame retardant: “CR-900 "Daihachi Chemical Co., Ltd., bromine-containing phosphate ester containing 70% bromine and 3% phosphorous. (* 11) Thickener:" ADEKANOL UH-420 "; * 12 Asahi Denka Co., Ltd. : "SN Deformer-A-63", manufactured by San Nopco (Note 13) Dispersant: "Nopco Space 44C", manufactured by San Nopco (Note 14) Cement: ordinary Portland cement Each coating material obtained as described above Dry film on Teflon resin coated steel plate In spray painting to be about 5 mm, 20 ° C.
-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 gloss and thermal conductivity of the coating film were examined, and the results are shown in Table 1.

A 200 × 300 × 3.2 mm thread
A water-based sealer ("Aqua G Sealer", manufactured by Kansai Paint Co., Ltd., trade name) was applied on a test plate and dried on a test plate.
Each coating material obtained as described above was washed with tap water for 15,000 to 2
Adjust viscosity to 000 cps and dry film thickness about 5mm
And dried in a constant temperature and humidity room at 20 ° 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) Gloss of coating film: The 60-degree specular reflectance of each test coated plate was measured.

(* 6) Self-extinguishing property: The test coated plate was placed at an angle of 45 ° with the coated surface facing downward, and heated with a candle flame from below. Candle flame is 3-4cm, 1c
m was set so as to be applied to the coating film. It was examined whether self-extinguishing was possible after heating with respect to the heating time, and the self-extinguishing property was evaluated using the maximum extinguishing heating time. ◎ is 15 seconds or more, ○
Is from 10 seconds to less than 15 seconds, Δ is from 5 seconds to less than 10 seconds, ×
Indicates less than 5 seconds.

(* 7) Hot-cooling 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.

(* 8) Sound insulation: 200 × 200 × 5 mm
Each of the heat-insulating coating materials obtained as described above was placed in a cube using 6 pieces of the above-mentioned slate plates with tap water for 15,000 to 20,000.
The viscosity was adjusted to cps, the whole surface was spray-coated so as to have a dry film thickness of about 5 mm, and dried in a constant temperature and humidity room at 20 ° C. and 65% RH for 7 days to form a coating film on the cube surface. Next, a hole having a diameter of 15 mm was formed in one surface of the painted cube, and a general sound level meter was installed therein. A sound source was provided 1 m away from the cube. The sound pressure level 1 m away from the front of the sound source was 90 dB. The sound generated from the sound source was measured by a sound level meter inside the cube, and the sound insulation was evaluated from the difference in sound pressure level inside and outside the painted cube.は indicates a sound pressure level difference of 30 dB or more, ◇ indicates 25 dB or more and less than 30 dB, △ indicates 2
0 dB or more and less than 25 dB.

[0049]

[Table 1]

Examples 8 to 19 and Comparative Examples 9 to 13 Aqueous sealers ("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. Comparative Examples 11 and 12
Did not apply the heat-insulating coating material on the test plate but directly applied the overcoating shown in Table 2. 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. "Ales Aqua Build": water-based thick film type single-layer elastic overcoat, low-staining 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. "Ares Aqua Build Deco": Water-based 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.

(* 9) 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.).

(* 10) Appearance of coating film: The state of the surface of the coating film after overcoating of each coated plate was visually observed.は indicates no abnormality, and × indicates defects such as cracks and blemishes.

(* 11) Heating / cooling cycle test: Each coated plate was subjected to a heat / cooling repetition test of JIS A 6909 according to the following test.
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.

(* 12) 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 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.

(* 13) 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 peeling and blistering are observed.

(* 14) Self-extinguishing property: The test coated plate was placed at an angle of 45 degrees with the coated surface facing downward, and heated with a candle flame from below. The candle flame is 3-4cm, part 1
It was set so that about cm was applied to the coating film. It was examined whether self-extinguishing was possible after heating with respect to the heating time, and the self-extinguishing property was evaluated using the maximum extinguishing heating time. ◎ is 15 seconds or more,
○ is 10 seconds or more and less than 15 seconds, Δ is 5 seconds or more and less than 10 seconds,
X indicates less than 5 seconds.

[0059]

According to the present invention, a heat-insulating coating film having excellent heat-insulating properties, flame-retardant properties, sound-absorbing properties, etc. is formed by containing a resin emulsion having specific properties, resin foam particles and aluminum hydroxide. it can.

[0060]

[Table 2]

Continued on the front page (51) Int.Cl. ⁶ Identification code FI C09D 5/18 C09D 5/18

Claims (4)

[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, (B) a thermal conductivity of 0.02 to 0.1 kc.
al / m · h · ° C, bulk density 0.02-0.5 g / c
c, resin foam particles having a particle diameter of 0.2 to 8 mm, and (C) aluminum hydroxide having a particle diameter of 100 μm or less,
(A) / (B) solid content volume ratio is 100 / 50-100
A thick-film type elastic heat-insulating coating material characterized in that it contains 20 to 100 parts by weight of (C) based on 100 parts by weight of the resin solid content of (A). 2. The thick film type elastic heat insulating coating material according to claim 1, which contains a bromine-containing phosphoric acid ester. 3. The thick-film elastic heat-insulating coating material according to claim 1, which contains basic magnesium sulfate. 4. 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 forming temperature of 25 ° C. or less in water, (B) a thermal conductivity of 0.02 to
At 0.1 kcal / m · h · ° C, bulk density 0.02
0.5 g / cc, resin foam particles having a particle diameter of 0.2 to 8 mm, and (C) aluminum hydroxide having a particle diameter of 100 μm or less were mixed with a solid content volume ratio of (A) / (B) of 100 /
50-100 / 500, and the resin solid content of (A) 10
A coating heat insulation method comprising applying a thick film type elastic heat insulating coating material containing 20 to 100 parts by weight of (C) to 0 part by weight, and then applying a top coat.