JP4499629B2 - Foam fireproof coating material - Google Patents

Description

  The present invention relates to a fireproof coating material which is applied to the surface of a steel material of a building, and the coating film is foamed in a fire to form a foam heat insulating layer on the surface of the steel material to protect the steel material from the flame and heat at the time of fire.

  Fireproof coating materials that satisfy the fireproof performance defined in the Building Standards Law can be broadly classified into two types: a relatively thick film mortar that does not cause foaming and a thin film that can form a heat insulation layer by foaming.

  Some refractory mortars are mainly composed of a cement, a lightweight aggregate, and an endothermic filler having crystal water, which are exemplified in Japanese Examined Patent Publication No. 04-54634. Descriptions are given in the claims and the third to fifth columns of the patent publication. In addition, Japanese Patent Laid-Open No. 05-32448 also has a cement-based fireproof coating material mainly composed of inorganic fibers and unfoamed meteorite. In the invention of JP-A-5-32448, unfoamed meteorite exhibits heat insulation by applying the property that crystal water evaporates, foams and expands at high temperatures. The claims and paragraphs 0004 to 0007 have descriptions.

Japanese Patent Publication No. 04-54634 (Claims and Patent Gazettes 3 to 5) JP 05-32448 A (claims and paragraphs 0004 to 0007)

  As fire-resistant paint, it is painted on the surface of building steel, etc., and in the event of a fire, the coating film foams and a foam insulation layer is formed on the surface of the steel to protect the steel from fire and heat in the event of a fire. For example, a foam-type fire-resistant paint is applied to the surface of a steel material, and the foamed fire-resistant coating film having a cured film thickness of about 1 to several mm thick starts foaming from about 200 to 300 ° C. by heating, and is 10 to 50 times. To form a foam layer having a thickness of several tens to 100 mm and exhibit heat insulation.

  As such a foam-type fireproof coating composition, for example, Japanese Patent Application Laid-Open No. 2001-40290 is given as Patent Document 3. This publication discloses a foamed coating composition containing a synthetic resin binder and ammonium polyphosphate. In paragraphs 0007 to 0010 of this publication, examples of the binder resin include melamine resin, acrylic resin, alkyd resin, vinyl chloride resin, vinyl acetate resin, urethane resin, epoxy resin, silicone resin, and polyester resin. It is also described that the resin is used alone or copolymerized, or a mixture thereof. Furthermore, as a form of these resins, a method in which they are dissolved in an organic solvent or a method of dispersing them in water as an emulsion is mentioned. Examples of the flame retardant foaming agent include ammonium polyphosphate, and examples of the carbon forming material include polyhydric alcohols such as pentaerythritol.

JP 2001-40290 (Claims and paragraphs 0007 to 0010)

  The above foam-type refractory paint, when trying to secure the film thickness necessary to exhibit the prescribed fire resistance performance in a small number of steps, when applied thickly at once, the paint will sag, or during drying and film formation Skinning or cracking may occur. For this reason, there is a limit to the thickness that can be applied at one time, and a large number of construction steps are required to obtain predetermined fire resistance. In addition, the resin for binder which is an essential component may cause an agglomeration reaction with the flame retardant foaming agent, and may have poor storage stability.

  The problem to be solved by the present invention is that, in a fireproof coating material that protects a steel structure from combustion heat at the time of a fire, a foaming fireproof paint has been developed to form a thin film. There is a limit, a large number of construction steps are required to obtain a predetermined fire resistance, and the stability of the binder is insufficient. And it is providing the fireproof coating | covering material which can make the film thickness to apply | coat thin compared with a fireproof mortar.

In the foam fire-resistant coating material according to claim 1 of the present invention, a hydrated and cured inorganic salt as a curing agent is used, and the hydrated and cured inorganic salt mainly comprises a carbonized foam layer forming agent and a foaming agent. Is a sulfate, and the ratio of the sulfate, the carbonized foam layer forming agent and the foaming agent is 100 parts by weight sulfate, 10 to 400 parts by weight carbonized foam layer forming agent, and 30 to 1000 parts by weight foaming agent. It is a summary.

The foam fireproof coating material according to claim 2 of the present invention is characterized in that, in the invention according to claim 1 , the sulfate is calcium sulfate .

The foam refractory coating material according to claim 3, wherein the present invention, using a hydrated hardenable inorganic salt as a curing agent, and a carbonized foam layer forming agents, and foaming agent, composed mainly of an expansion agent, the hydration hardening The form inorganic salt is sulfate, and the ratio of sulfate, carbonized foam layer forming agent, foaming agent and expansion agent is 100 weight parts of sulfate, 10 to 400 parts by weight of carbonized foam layer forming agent, and 30 to 1000 weight parts of foaming agent. Part, expansion agent 10 to 400 parts by weight .

The foam fireproof coating material according to claim 4 of the present invention is characterized in that, in the invention according to claim 3 , the sulfate is calcium sulfate .

In the fire-resistant foam coating material according to claim 5 of the present invention, a hydrate-cured inorganic salt is used as a curing agent, and a carbonized foam layer forming agent, a foaming agent, an expansion agent, and an aggregate as main components , The hydrated and cured inorganic salt is sulfate, and the ratio of sulfate, carbonized foam layer forming agent, foaming agent, expansion agent, and aggregate is 100 parts by weight sulfate, carbonized foam layer forming agent 10 to 400 weights. It is summarized as follows: parts, foaming agent 30 to 1000 parts by weight, expansion agent 10 to 400 parts by weight, and aggregate 15 to 1000 parts by weight .

The foam fireproof coating material according to claim 6 of the present invention is characterized in that, in the invention according to claim 5 , the sulfate is calcium sulfate .

In the foam fireproof coating material according to claim 7 of the present invention, in the invention according to any one of claims 1 to 6 , a phosphinate, a diphosphinate or a polymer thereof is selected as the foaming agent. This is the gist.

  The foamed fireproof coating material in the present invention does not use a film-forming binder and an appropriate solvent, and uses a hydrated and cured inorganic salt such as gypsum as a curing agent, so that the carbonized foam layer forming agent and the foaming agent are the main components. Necessary for obtaining specified fire resistance because it can be applied to steel workpieces, ceilings, walls, cables, pipes, etc., blowing agents, aggregates, conventional auxiliaries and additives The present invention is significant in that the number of steps for applying a large thickness can be greatly omitted.

  In addition, this foam fireproof coating material can prevent the synthetic resin as a film-forming binder from being aggregated by ammonium phosphate or ammonium polyphosphate as a foaming agent, thereby solving the problem of storage stability. can do.

  When the foamed refractory coating material having the blending ratio described in claim 1 is used, foaming starts at a temperature of about 200 to 300 ° C., forms a foam layer thicker than the coating thickness, and exhibits heat insulation.

  When phosphinates and / or diphosphinates and / or polymers thereof are selected as the blowing agent, the elimination reaction of ammonium proceeds at a temperature of about 200 to 300 ° C., and then the reaction with the carbonized foam layer occurs and foaming occurs. Form a layer.

  In addition to the effects described in claims 1 and 2, the foaming efficiency is increased by adding an expansion agent, resulting in higher fire resistance. Demonstrate the effect.

  When melamine and / or a derivative thereof as a nitrogen-containing swelling agent is selected as the swelling agent, a two-stage foaming that increases the foaming ratio again at a temperature different from the decomposition temperature of the flame retardant blowing agent may be used. it can. Therefore, it is possible to obtain a foamed fireproof coating material having a higher foaming ratio and excellent fireproof performance.

  In addition to the effects described in claims 3 and 4, the strength of the coating film after formation of the foamed layer can be obtained by adding aggregate in addition to the effects described in claims 3 and 4. There is an effect to raise.

As foamed agents, better to use the diammonium phosphate is, the ratio of ammonia desorbed reaction in their polymers and dimer or the same mass than in ammonium phosphate monobasic, many, also, carbide foam layer forming material It is preferable to use diammonium phosphate to initiate the elimination reaction at a lower temperature than some pentaerythritol decomposes.

  The foamed fireproof coating material of the present invention does not use a film-forming binder and a suitable solvent, and has a carbonized foamed layer forming agent and a foaming agent as essential components, and further includes blowing agents, aggregates or conventional auxiliaries, It is a foamable fire-resistant coating material that cures a fire-resistant component based on an additive with a hydration-curable inorganic salt.

Hereinafter, the components of the present invention will be described in detail.
Examples of the hydrated and cured inorganic salt include calcium sulfate (CaSO ₄ · 1 / 2H ₂ O) or potassium sulfate (CaSO ₄ · KSO ₄ · H ₂ O), which is a main component of gypsum, magnesium sulfate, barium sulfate, Sulfate bands, sulfates such as ammonium cyngenite ((NH ₄ ) ₂ SO ₄ · CaSO ₄ · H ₂ O), aluminosilicates such as monocalcium aluminosilicate and dicalcium aluminosilicate, monocalcium aluminate, trialuminum aluminate Calcium aluminate, tetracalcium aluminoferrate, calcium metasilicate, calcium phosphate, magnesium phosphate, barium phosphate, phosphate such as aluminum phosphate, and the like can be cited as those having hydration curable properties. Since these can exist as a hydrate salt at normal temperature, they are preferable. It may also be present as an oxide after being exposed to a flame. Among these, gypsum is neutral, the water weight after the hydration reaction is 21% per unit weight, the price is inexpensive, and it is easily available, so it is excellent in practicality.

  Portland cement and alumina cement, which are typical hydration-curing inorganic salts such as hydration-curing inorganic salts, react with acid salts with ammonium phosphate and ammonium polyphosphate, which are essential foaming agents. Not suitable for use.

  For this reason, the inorganic salt used as a curing agent is preferably a neutral or acidic salt in order to avoid a reaction with an ammonium phosphate salt used as a foaming agent.

  The use of these hydration-curable inorganic salts can prevent aggregation due to ammonium phosphate or ammonium polyphosphate as the resin binder of fireproof paints, and it is also easy to adjust the viscosity, such as trowel coating, spray coating, etc. As an advantage, it is possible to expand the usage method of the coating film, and it is possible to adjust the coating thickness within the range of several centimeters to several millimeters with the ease of viscosity adjustment.

  Examples of the carbonized foam layer forming agent include polyhydric alcohols such as pentaerythritol, dipentaerythritol, tripentaerythritol, and a polycondensation compound of pentaerythritol.

As the foaming agent, phosphinic acid salts and / or diphosphinic acids such as monoammonium phosphate and / or diammonium phosphate and / or ammonium diphosphate, ammonium polyphosphate, melamine phosphate, melamine diphosphate and melamine polyphosphate Examples are salts and / or polymers thereof.

  Examples of the swelling agent as the fourth component include melamine and / or guanidine or salts thereof and / or dicyandiamides, triazoles or triazole salts.

  Examples of the aggregate include titanium dioxide, zinc oxide, silica sand, calcined vermiculite, nacreite pearlite, obsidian pearlite and the like. In general, titanium dioxide and zinc oxide are added as pigments in the paint industry. However, since the purpose of the aggregate is not to cover the object to be coated but to stabilize the foam layer, titanium dioxide and zinc oxide are also bones. Use wood.

  Comprising conventional auxiliaries and additives, acrylic fibers, glass fibers, mineral fibers, kaolin, talc, aluminum oxide, aluminum hydroxide, magnesium hydroxide, precipitated silica, silicates and / or powdered cellulose Substances.

The foamed fireproof coating material of the present invention can exhibit the performance required when the hydration-curable inorganic salt, the carbonized foamed layer forming agent and the foaming agent, which are the main components described above, are used in the blending ranges shown below. .
Hydrated and curable inorganic salt 100 parts by weight Carbonized foam layer forming agent 10 to 400 parts by weight Foaming agent 30 to 1000 parts by weight An expansion agent or a conventionally known auxiliary agent for the foamed fireproof coating material mainly composed of the above three components It is also possible to add additives and aggregates as long as they do not impair the gist of the present invention. The addition ratio is set to 1500 parts by weight or less with respect to 100 parts by weight of the hydrated and cured inorganic salt.

  When the ratio of the carbonized foam layer forming agent to the hydrated curable inorganic salt in the above composition is less than 10 parts by weight, sufficient foaming power cannot be obtained during heating, and sufficient fire resistance cannot be obtained.

  On the other hand, when the ratio of the carbonized foam layer forming agent to the hydrated curable inorganic salt in the above composition exceeds 400 parts by weight, the balance with the foaming agent is lost and an unreacted carbon foam layer forming agent is produced.

  When the ratio of the carbonized foamed layer forming agent to the hydrated and cured inorganic salt is 30 parts by weight or more and 100 parts by weight or less, more effective foamed layer formation is performed.

  When the ratio of the foaming agent to the hydrated curable inorganic salt in the above composition is less than 30 parts by weight, the concentration of the dehydration reaction component is too low, so that sufficient foaming power cannot be obtained and it is difficult to exhibit sufficient fire resistance. Become.

  When the ratio of the foaming agent to the hydrated curable inorganic salt in the above composition exceeds 1000 parts by weight, the concentration of the foaming agent is too high, and rapid foaming proceeds by heating, so that a uniform foamed layer cannot be formed.

  When the ratio of the foaming agent to the hydrated and cured inorganic salt is 100 parts by weight or more and 400 parts by weight or less, a more harmonious foam layer is formed.

In the above-mentioned blending range, foaming at the time of overheating and film formation of the foamed layer proceed with a better balance than when used in the blending range shown below, and fire resistance performance in a more preferable range is exhibited.
Hydrated and cured inorganic salt 100 parts by weight Carbonized foam layer forming agent 50 to 200 parts by weight Foaming agent 200 to 400 parts by weight In addition to the above-mentioned foam fireproof coating material mainly composed of the three components, an expansion agent or a conventionally known one Auxiliaries, additives, and aggregates may be added within 1500 parts by weight per 100 parts by weight of the hydrated and cured inorganic salt, and may be added within a range that does not impair the gist of the present invention.

The foam fireproof coating material of the present invention exhibits the required performance when used in the following blending ranges, which are the above-mentioned main components, hydration-curable inorganic salt, carbonized foam layer forming agent, foaming agent and expansion agent. Can do.
Hydrated cured inorganic salt 100 parts by weight Carbonized foam layer forming agent 10-400 parts by weight Foaming agent 30-1000 parts by weight Expanding agent 10-400 parts by weight It is also possible to add known auxiliaries or additives and aggregates within a range that does not impair the gist of the present invention. The addition ratio is within 1100 parts by weight with respect to 100 parts by weight of the hydrated and cured inorganic salt.

  When the ratio of the swelling agent to the hydrated curable inorganic salt in the above composition is less than 10 parts by weight, the amount of the foaming agent in the total weight is too small, and even if thermal decomposition proceeds during overheating, it is formed with other components It does not exert a sufficient expansion effect with little influence on the layer to be formed.

  On the contrary, when the ratio of the swelling agent to the hydrated curable inorganic salt in the above composition exceeds 400 parts by weight, the amount of the blowing agent added to the total weight is too large, and when the thermal decomposition proceeds, the swelling is sufficient. A foam layer with a sufficient strength cannot be formed.

  In the above-mentioned blending range, by using an expansion agent, a higher expansion ratio can be obtained, and higher fire resistance can be obtained than when the expansion agent is not used. When the ratio of the swelling agent to the hydrated and cured inorganic salt is 50 parts by weight or more and 200 parts by weight or less, the foamed layer is formed in a balanced manner with a high expansion ratio.

Furthermore, more effective performance can be exhibited when the following blending ranges are employed.
Hydrated and cured inorganic salt 100 parts by weight Carbonized foam layer forming agent 10 to 400 parts by weight Foaming agent 30 to 1000 parts by weight Expanding agent 10 to 400 parts by weight Aggregate 15 to 1000 parts by weight In this case, a conventionally known auxiliary agent or The additive is preferably within 100 parts by weight based on the hydrated and cured inorganic salt, and it is desirable to select a phosphinate and / or diphosphinate and / or a polymer thereof as the foaming agent.

  In the above blending, by adding aggregate, the coating film strength can be adjusted and foaming during overheating can be efficiently advanced. When the ratio of the aggregate with respect to the hydration hardening type inorganic salt in the said composition is less than 15 weight part, since the addition amount with respect to another component is small, the influence which adds an aggregate is hardly exhibited.

  When the ratio of the aggregate to the hydrated and cured inorganic salt in the above composition exceeds 1000 parts by weight, the amount of aggregate added is excessively increased, and the reaction of the carbonized foam layer forming agent and the foaming agent is relatively lowered and the reaction proceeds. It becomes difficult to do.

  Furthermore, when diammonium phosphate is selected as the foaming agent, more favorable fire resistance performance is obtained when the diphosphinic acid salt and / or these polymers are selected because the number of reactive molecules per weight is increased.

  The foamed refractory coating material of the present invention is preferably used to protect various substrates such as steel, aluminum, zinc iron and asbestos cement boards, electrical cables and tubes. It is also useful for making flammable materials such as wood, plywood, paper, and fibers semi-incombustible or flame retardant.

  As a construction method, the substrate is coated by a method such as spraying, roller, or trowel coating. At this time, the fire-resistant coating material is kneaded with water so as to suit each coating method.

  In using the foamed fireproof coating material of the present invention, it is also possible to apply a foamable fireproof coating material after applying a primer by a primer treatment (eg, a rust preventive paint in the case of a steel frame). After coating the foamed fireproof coating material of the present invention, it is possible to carry out intermediate coating and top coating for the purpose of improving the appearance and durability.

  Next, a method for measuring fire resistance of the foam fireproof coating material configured as described above will be described. Now, the STKR400 square general structure square steel pipe (300 mm long, 300 mm wide, 9 mm thick) stipulated in blasted JISG3466 is coated with a foam fireproof coating material to a thickness of 2 mm with a trowel and cured for 21 days. To make a test specimen. This test body was subjected to a heating test according to the standard heating curve of JIS A1304, and the back surface temperature of the steel material was measured by a K thermocouple.

  This test specimen is evaluated by observing the time (minutes) when the back surface temperature of the steel material reaches 500 ° C. and the appearance of the test specimen after heating. As described above, according to this embodiment, the following effects are exhibited.

  Foam fire-resistant coating material is a coating material mainly composed of carbonized foam layer forming agent, foaming agent, expansion agent, hydrate-curing inorganic salt, and it can be heated by using gypsum as hydrate-curing inorganic salt. When exposed, the evaporation of gypsum crystal water proceeds in the range of 130 to 190 ° C. to prevent the conduction of the combustion heat to the substrate, and the dissociation reaction of sulfuric acid gas proceeds endothermically.

  In the range where the amount of hydrated and cured inorganic salt used exceeds 70% of the kneading amount of the carbonized foaming layer forming agent and the foaming agent, the coating material is too hard and foaming is hindered and foaming performance is exhibited. It becomes difficult.

  In addition, when the hydrated and cured inorganic salt uses gypsum, the dehydration condensation reaction with polyhydric alcohol efficiently proceeds as a flame retardant foaming agent in the case of diammonium phosphate rather than monoammonium phosphate. This is because diammonium phosphate is once decomposed at 155 ° C or higher and ammonium is released, becoming ammonium monophosphate, and again at 216 ° C or higher, causing ammonium desorption reaction, so that the carbonized foam layer This is thought to cause a dehydration reaction with the forming agent in two stages.

  Since the thermal decomposition temperature is 260 ° C. because the polyhydric alcohol which is the carbonized foam layer forming agent is at least one of pentaerythritol, dipentaerythritol, tripentaerythritol and polypentaerythritol, the flame retardant foaming agent Since this causes decomposition faster, a stable foamed layer can be formed.

  In the present invention, the following improvements can be added. For example, a more stable foamed layer can be formed by using a nitrogen-containing swelling agent as the swelling agent of the foamed fireproof coating material component. When melamine and its derivatives are used as the nitrogen-containing expansion agent, the expansion ratio can be increased again at a temperature different from the decomposition temperature of the flame-retardant foaming agent, and two-stage foaming can be performed.

  Moreover, by including titanium dioxide in the foamed fireproof coating material component, the bonding of the foamed layers is promoted by the catalytic effect of titanium dioxide, and a foamed layer having a high shape maintaining property is formed. When the titanium dioxide is anatase type, the catalytic effect is further promoted.

  Examples and comparative examples are shown below, and the fireproof coating material of the present invention will be described more specifically. However, these examples are intended to illustrate the present invention and not to limit it. First, Tables 1 and 2 below show formulation examples of Examples and Comparative Examples.

実施例１は請求項２の適量範囲のもの、実施例２は請求項４の適量範囲のもの、実施例３及び実施例４は請求項４の範囲にあるもの。

Example 1 is within the proper range of Claim 2, Example 2 is within the proper range of Claim 4, and Examples 3 and 4 are within the scope of Claim 4.

実施例５は、請求項６の適量範囲のもの。
比較例１は、水和硬化形無機塩を含まず合成樹脂を用いたものである。
実施例６は、実施例５の酸化チタンの代わりに珪砂を一部用いたもの。
実施例７は、実施例５の発泡剤にリン酸一アンモニウムを用いたもの。

Example 5 is within an appropriate amount range of claim 6.
Comparative Example 1 uses a synthetic resin that does not contain a hydration-curable inorganic salt.
In Example 6, a part of silica sand was used in place of the titanium oxide of Example 5.
Example 7 was obtained by using monoammonium phosphate as the foaming agent of Example 5.

比較例２は、炭化発泡層形成剤が適量範囲より少ないもの。
比較例３は、炭化発泡層形成剤が適量範囲より少ないもの。
比較例４は、炭化発泡層形成剤が適量範囲より多すぎるもの。
比較例５に、発泡剤が適量範囲より少なすぎるもの。

In Comparative Example 2, the carbonized foam layer forming agent is less than the appropriate amount range.
In Comparative Example 3, the carbonized foam layer forming agent is less than the appropriate amount range.
In Comparative Example 4, the carbonized foam layer forming agent is too much in an appropriate amount range.
In Comparative Example 5, the foaming agent is too little than the appropriate amount range.

  The base of the comparative test is a STKR400 square general structure square steel pipe defined in JIS G3466, which has been blasted, and is a foamed fireproofing by combining the examples or comparative examples on a square steel pipe having a length of 300 mm, a width of 300 mm, a thickness of 9 mm and a length of 1000 mm The coating material was applied once with a trowel to a thickness of 2 mm and 4 mm, and cured for 21 days to prepare a test specimen. The curing conditions were a room temperature of 20 ° C. and a humidity of 65% RH. In applying the foamed fireproof coating material, each coating material was diluted and adjusted so as to have a viscosity of 50 to 65 dPa · s.

  This test body was subjected to a heating test according to the standard heating curve of JIS A1304, and the back surface temperature of the steel material was measured by a K thermocouple.

The evaluation was performed by observing the appearance of the test specimen after coating and drying, measuring the time when the back surface temperature of the steel material reached 500 ° C., observing the appearance of the test specimen after heating, and measuring the expansion ratio. .
In the appearance observation of the test specimen after application of the foamed fireproof coating material, the presence or absence of cracks in the coating film was visually confirmed. The crack of the coating film or the foamed layer was expressed as follows: no crack at all, ○, crack occurred, the crack width was less than 1 mm, Δ, crack width was 1 mm or more, and ×.

In observation of the appearance of the test body after completion of heating, an evaluation of ◯ Δ × was made depending on the degree of falling off of the foam layer and the size of the bubbles of the porous body in the coating film after foaming. In terms of the degree of falling off of the foamed layer, the foamed layer was not dropped at all. ○, less than 20% of the whole was dropped. Δ, and 20% or more of the whole was dropped. As for the size of the bubbles in the porous body, those having a size of 0.5 mm or less are indicated as .largecircle., Those in the range of 0.5 to 1.5 mm are indicated as .DELTA.

The test results of Examples and Comparative Examples are shown in Table 4 below.

By using the foamed fireproof coating material of the present invention, the number of steps for applying a thickness necessary for obtaining a predetermined fireproof performance can be largely omitted, and the fireproof time can be advantageously extended.

Claims (7)

A hydration-curable inorganic salt as a curing agent, a carbonized foam layer forming agent and a foaming agent as main components, and the hydrate-curable inorganic salt is a sulfate,
The ratio of sulfate, carbonized foam layer forming agent and foaming agent is
100 parts by weight of sulfate
Carbonized foam layer forming agent 10 to 400 parts by weight
30-1000 parts by weight of blowing agent
Foam fireproof coating material characterized by being. The foamed fireproof coating material according to claim 1, wherein the sulfate is calcium sulfate. A hydration-curable inorganic salt as a curing agent, a carbonized foam layer forming agent, a foaming agent, and a swelling agent are the main components, and the hydration-curable inorganic salt is a sulfate,
The ratio of sulfate, carbonized foam layer forming agent, blowing agent and swelling agent is
Sulfate 100 weight
Carbonized foam layer forming agent 10 to 400 parts by weight
30-1000 parts by weight of blowing agent
10 to 400 parts by weight of swelling agent
Foam fireproof coating material characterized by being. The foamed fireproof coating material according to claim 3, wherein the sulfate is calcium sulfate. A hydration-curable inorganic salt as a curing agent, a carbonized foam layer forming agent, a foaming agent , a swelling agent and an aggregate are the main components, and the hydration-curable inorganic salt is a sulfate,
The ratio of sulfate, carbonized foam layer forming agent, foaming agent, swelling agent, and aggregate is
100 parts by weight of sulfate
Carbonized foam layer forming agent 10 to 400 parts by weight
30-1000 parts by weight of blowing agent
10 to 400 parts by weight of swelling agent
15-1000 parts by weight of aggregate
Foam fireproof coating material characterized by being. The foamed fireproof coating material according to claim 5, wherein the sulfate is calcium sulfate. The foam refractory coating material according to any one of claims 1 to 6, wherein a phosphinate, a diphosphinate or a polymer thereof is selected as the foaming agent.