JP2001072930A - Foaming fireproof coating material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a multifunctional foaming fireproof coating material which can express a variety of designing such as the texture of a plastered wall, a sand wall and the like, three-dimensional patterns with a sense of unevenness and the like and, simultaneously, possesses heat insulating properties and heat reflecting properties. SOLUTION: A foaming fireproof coating material comprises a vehicle of a coating formed of an water base acrylic resin or a latex system, an aqueous alkyd system, a melamine system, a urea/phenolic resin system, a vinyl chloride system or the like, a blowing agent which evolves a gas such as non-combustible ammonia and carbon dioxide by caloric heat, a carbonized layer-forming substance which includes, for example, a saccharide and a polyhydric alcohol and forms a carbonized layer by foaming under caloric heat, and a coated-type catalyst for forming a the carbonized layer which include, for example, ammonium phosphate micro-capsulated with a thin film of a water-resistant resin. In this instance, 20-40 wt.% closed-type hollow ceramic fillers having an average particle diameter of 200-300 μm are incorporated into the coating material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foamed fire-resistant paint which is suitable for use in buildings and interior and exterior of buildings, and has excellent fire resistance and aesthetic appearance.

[0002]

2. Description of the Related Art Conventionally, when heated by being exposed to the flame of a fire, the coating applied to the substrate expands and swells to form a carbonized layer, and the heat insulating property of the carbonized layer protects the substrate from fire. For example, Japanese Patent Application Laid-Open No. 5-6 / 1990
It has been proposed in Japanese Patent No. 5436 and the like.

[0003] The proposed foamed refractory coating agent comprises adding a titanium zirconium, vanadium, boron nitride or the like as a powder having a size of 50 µm or less to a foamed heat insulating type refractory coating agent comprising a phosphorus compound, a synthetic resin, an organic foaming agent and the like. Thereby, the strength and heat resistance of the foamed and swollen carbonized layer are improved,
It is disclosed that in order to improve the aesthetics of the coating film, the particle size of the powder to be added is preferably 20 μm or less.

[0004]

The foamed refractory coating agent proposed above is one in which the inorganic substance is added in the form of a powder having a particle size of 50 μm or less. According to the disclosure that the following particles should be used, the improvement of the aesthetics is from the viewpoint of the smoothness of the coating film. However, with the proposed foamed refractory coating agent, even if the appearance can be improved from the viewpoint of the smoothness of the painted surface, it can only express the texture of the paint, and the texture of the plaster wall or sand wall etc. It is difficult to express various design features that exhibit a three-dimensional pattern with a sense of unevenness by producing a three-dimensional pattern. For this reason, even when used in buildings and structures, the expressiveness of the design is poor, so there are many restrictions on the places where it can be used, and it can not be widely used throughout building structures. Could not be fully utilized for fire prevention of buildings and structures.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a texture such as a plaster wall or a sand wall to express a variety of design features having an uneven feeling. It is an object of the present invention to provide a foamed refractory paint having excellent aesthetic properties.

[0006]

In order to achieve the above object, a multifunctional paint according to the present invention comprises: a paint vehicle;
A foaming agent that generates incombustible gases such as ammonia and carbon dioxide by fire, a carbonized layer-forming substance that forms a carbonized layer by foaming under fire, such as sugars and polyhydric alcohols, and a water-resistant resin In a fire-resistant refractory paint comprising a thin-coated and microencapsulated coating-type carbonized layer forming catalyst such as ammonium phosphate, the average particle size is 150 to
A closed hollow ceramic filler of 350 μm is used for 20-4
It is characterized by being blended at 0% by weight.

Here, as the vehicle of the above-mentioned refractory paint, aqueous acrylic resin or latex type, aqueous alkyd, melamine, urea phenol resin type, vinyl chloride type or the like can be used.

[0008] As the foaming agent, those which generate incombustible ammonia, carbon dioxide, water, hydrogen chloride, etc. by fire heat, such as ginandiamide, melamine, glycine, guanidine, urea, and paraffin chloride are employed. it can.

As the substance for forming the carbonized layer by the thermal foaming, saccharides such as glucose and maltose, polyhydric alcohols such as pentaerythritol and arabitol, vinyl acetate, amide resin and the like can be used.

As a catalyst for forming a carbonized layer, phosphoric acid, ammonium phosphate, ammonium polyphosphate and the like can be employed. The above-mentioned ammonium polyphosphate and the like are used not only as a catalyst for forming a carbonized layer but also as a non-combustible gas foaming agent, but if left for a long time, decomposition occurs in the paint and ammonia gas is generated and deteriorates with time, The foamed carbonized layer becomes thinner than the initial performance, and the fire prevention performance is reduced. Therefore, in order to prevent this change over time, a product that is microencapsulated by thinly coating with a water-resistant resin is used for the carbonized layer forming catalyst. The fire retardant paint containing the microencapsulated carbonized layer forming catalyst exhibits good durability with almost no change over time. In particular, ammonium salt volatilizes as ammonia gas after its application, so that if it is made into a microencapsulated coating type, there is no change in properties, and the fire protection performance of the product can be maintained for a long time.

As the closed hollow ceramic filler,
For example, E-SPHERES manufactured by Taiheiyo Cement Corporation can be used. The particles of the closed hollow ceramic filler have an average diameter of 1
The thickness is 50 to 350 μm, and the mixing ratio is 20 to 40% by weight.

That is, if the average particle size is less than 150 μm, the thick coating property is reduced and becomes flat when applied to a base material, and it is difficult to display a three-dimensional pattern such as a plaster wall having an uneven feeling. The design is impaired. When the particle size is 150 μm or more, the texture of the aggregate is enhanced, so that a pattern such as stipple with a roller, spatter finish, lysine by spraying, and stucco finish gives a three-dimensional effect.
In addition, there is a great difference in the appearance when spraying a multi-color such as two colors or three colors. On the other hand, when it exceeds 350 μm, the closed hollow filler is crushed at the time of stirring, so that the crushing becomes more conspicuous and the aesthetic appearance is reduced.

When the content of the closed type hollow ceramic filler is less than 20% by weight, the thick coating property is reduced and the design property is reduced in the same manner as described above. Water resistance and strength begin to decrease. If the content of the closed hollow ceramic filler is too large, the fire protection performance also decreases. Therefore, it can be said that 40% by weight is almost the upper limit of the mixing ratio.

[0014]

EXAMPLE An acrylic emulsion is used as a vehicle for a paint. Melamine and urea are used as foaming agents that generate incombustible gases such as ammonia and carbon dioxide by the heat of heat. Pentaerythritol is used as the charcoal layer forming substance. As the coating type carbonized layer forming catalyst, a microencapsulated coating type ammonium polyphosphate is used. This coated ammonium polyphosphate also functions as a nonflammable gas blowing agent.

These acrylic emulsions, pentaerythritol, melamine and urea, and coated ammonium polyphosphate are used as basic main components, and as secondary components,
Incorporate inorganic fillers, water, etc. to form a foamed refractory paint.

The foamed refractory paint is used as a closed hollow ceramic filler as Yeast Spheres SL350 manufactured by Taiheiyo Cement Corporation (particle size range: 200 to 3).
50 μm, and an average particle size of 250 μm) were added and kneaded in the mixing ratio range shown in the following table to produce a foamed refractory paint.

[0017]

[Table 1]

When the foamed refractory paint is applied to the base material, a coating thickness of at least 0.5 mm can be secured. Therefore, patterns such as stipple by roller coating, spatter finishing, lysine by spray coating, and stucco finishing can be obtained. In addition to being able to express a three-dimensional pattern with a sense of unevenness, it is also possible to express textures such as plaster walls and sand walls, and it has become possible to secure various designs and aesthetics .

Moreover, since the closed hollow ceramic filler is used, not only the specific gravity can be reduced and the weight can be reduced, but also the heat insulating property can be improved. A multifunctional foamed refractory paint having excellent heat resistance and heat reflection and heat insulation properties was obtained.

[0020]

As described above in detail, according to the foamed refractory paint of the present invention, the foamed refractory paint is blended with 20 to 40% by weight of a closed hollow ceramic filler having an average particle size of 150 to 350 μm. By adopting the configuration, not only can it be possible to express a three-dimensional pattern with a sense of unevenness in a pattern such as stipple or sputter finish by roller painting, lysine or stucco finish by spray painting, but also like a plaster wall or a sand wall. A variety of designs and aesthetics can be secured, and the use of a closed hollow ceramic filler not only reduces the specific gravity but also reduces the weight, as well as heat insulation and heat. It is possible to obtain a multifunctional foamed refractory paint having a reflective property.

Continued on the front page (72) Inventor Toru Watanabe 1-14-15, Ebisu Minami, Shibuya-ku, Tokyo F-term in the Japan Institute for Environmental Studies (reference) 4J038 BA012 EA011 HA416 KA21 NA01 PB05

Claims (1)

[Claims] Claims: 1. A vehicle for a paint, a foaming agent for generating nonflammable gas such as ammonia and carbon dioxide by fire heat,
Formation of carbonized layer forming substance such as saccharides and polyhydric alcohol that forms carbonized layer by foaming under heat of heat, and formation of coated carbonized layer such as ammonium phosphate microencapsulated by thin coating with water-resistant resin A foamed fire-resistant paint comprising a catalyst and a foamed fire-resistant paint, comprising 20 to 40% by weight of a closed hollow ceramic filler having an average particle size of 150 to 350 µm.