KR100377832B1 - Aqueous Intumescent Paint Composition and Fire-Proof Material Prepared by Using the Same - Google Patents

Abstract

Disclosed are an aqueous-based forbidden coating composition which significantly improves water resistance and fire resistance, and a fire resistant coating material formed by coating the paint. In the present invention, 10-30% by weight of a water-based vinyl acetate-based resin or a special acryl resin, which is a main film for forming a film, 5-15% by weight of a carbonizing agent as a poby component, 15-35% by weight of a catalyst, and 5-15% by weight of a blowing agent 2-10% by weight of special refractory pigments, 2-10% by weight of colored pigments and 2-6% by weight of additives. In the present invention, it is designed to form a solid foam insulation layer has excellent fire resistance than the conventional water-based fire-resistant coating, and does not contain a halogen component does not emit a gas harmful to the human body as well as the disadvantages of the conventional water-based fire-resistant coating material It also provides a significantly improved composition in the water resistance that appeared.

Description

Aqueous Intumescent Paint Composition and Fire-Proof Material Prepared by Using the Same

The present invention relates to an aqueous base coat composition and a fireproof coating prepared using the same.

The coating composition of the present invention is coated with a base material as a fireproof coating material to impart high water resistance, high durability, and high chemical resistance, as well as thermal decomposition and non-combustible gas generation due to temperature rise when the fireproof coating material is exposed to flame. It is designed to form a special insulation layer that can protect the body from flames by foaming and expanding about 50-100 times than the original dry coating film through a step reaction.

In general, steel is non-combustible, but its fire resistance is weak. Therefore, when the temperature of steel increases due to fire, the tensile strength, compressive strength, and yield point change, not only the volume of steel but also the temperature gradient inside the steel. This may even cause the building to collapse. Therefore, in preparation for this, steel materials must be fireproofed according to the structure, content and purpose of the building.

Existing fireproof coating materials include inorganic foam coating materials which are mixed with mineral wool and rock wool and vermiculite and oil-based acryl resin as a colorant. In the case of inorganic foam coating materials, the coating density of coating materials is not dense. The durability and weather resistance are inferior, and in particular, it is easily peeled off even by a weak external shock such as vibration, so that the function as a coating material is reduced, and there are limited environmental applications due to the environmental pollution and fatal defects due to the peeling layer. In addition, for oil-based forbidden fire-resistant cladding, not only does it cause serious air pollution problems, but also contains a large amount of volatile organic solvents when installed under closed or poorly ventilated working conditions, which can cause another fire. It has a fatal flaw that impairs worker's health and hygiene.

Therefore, there is a need for an aqueous fire-resistant coating material that replaces a large portion of the solvent with water rather than an oil-based paint that uses a large amount of solvent, which causes work environment problems and serious air pollution problems. At the current time of tightening regulations, research is being actively conducted.

The inventors of the present invention invented a forbidden fire-resistant coating composition using an aqueous resin, a ceramic pigment, or a porous silicon-based pigment using a Poby theory according to the above requirement, and filed on July 22, 1996 (Patent Application No. 96-96). 29553).

However, in the case of the water-based fire-resistant coating material that has been studied so far, the above-mentioned problems have been largely overcome, while the water resistance is relatively inferior to that of the oil-based fire-resistant coating material. Due to its weakness and loss at high flame speeds, a problem of lowering fire resistance has emerged. The water-based forbidden coating composition disclosed in the patent application was not satisfactory in water resistance.

Therefore, the object of the present invention is to improve the water resistance, which has been shown to be a disadvantage of the conventional water-based fire-resistant coating material as described above, and at the same time excludes the use of a halogen-containing material, and thus does not emit any harmful gases in the event of fire. In addition, the foam insulation layer, which plays a direct role in protecting the body from flames, can be firmly formed at a level equal to or higher than that of the conventional oil-based system, thereby causing the foam insulation layer to be lost at the high flame speed exhibited by the conventional aqueous fireproof coating. It is to provide a water-based forbidden coating composition that can maintain the fire resistance performance for a longer time to solve the problem.

Another object of the present invention is to provide a fireproof coating prepared using the coating composition.

According to the present invention, an aqueous vinyl acetate-silane copolymer, an aqueous ethylene-vinylacetate copolymer, an aqueous butyl acrylate copolymer 10-30% by weight of an aqueous resin composed of at least one selected from the group consisting of a copolymer and an aqueous vinylacetate-acrylate copolymer, 5-15% by carbonizing agent, and ammonium polyphosphate surface-treated as a catalyst 15-35% by weight, 5-15% by blowing agent, 2-10% by weight of optical fiber, 2-10% by weight of colored pigment, 2-6% by weight of additive as heat insulating pigment to provide.

The present invention also provides an aqueous vinyl acetate-silane copolymer, an aqueous ethylene-vinylacetate copolymer, an aqueous butyl acrylate copolymer and an aqueous vinyl as a colorant. 10-30% by weight of an aqueous resin composed of at least one selected from the group consisting of acetate-acrylate copolymers, 5-15% by carbonizing agent, 15-35% by weight of ammonium polyphosphate surface-treated as a catalyst, 5-15 wt% of a blowing agent, 2-10 wt% of an optical fiber as a heat insulating pigment, 2-10 wt% of a colored pigment, and 2-6 wt% of an additive, to coat the aqueous based aerated refractory coating coating composition, and to insulate upon heating. Provided is an abrasion resistant fire resistant coating which can induce a forsythia layer.

First, as the resin used as a colorant, an aqueous ethylene-vinylacetate copolymer, an aqueous butyl acrylate copolymer, an aqueous vinylacetate-acrylate aerial As a copolymer, an aqueous vinyl acetate-silane (Vinylacetate-silane) copolymer, an aqueous resin having a glass transition temperature of −50 ° C.-50 ° C. is used alone or in combination. If the composition of the aqueous resin is less than 10% by weight based on the total weight of the total composition, it is not preferable because a continuous coating film cannot be formed, and if it is more than 30% by weight, the poby effect is significantly lowered, which is not preferable. Therefore, the content of the aqueous resin is used in 10 to 30% by weight.

Particularly, in the present invention, a vinylacetate-silane copolymer having excellent water resistance by copolymerizing silane (Silane) in aqueous vinyl acetate (Vinylacetate) alone or another as a method for improving the water resistance. Used by mixing with resin.

Chemicals used as carbonizing agents include sorbitol, pentaerythritol, dipentaerythritol, tripentaerythritol, methylpentolamine, methylol melamine, and lysosinol. (Resorcinol), linseed oil, etc. are suitable materials for carbonization in flames to form a non-combustible carbide ceramic layer. If the composition of the carbonizing agent is 5% by weight or less based on the total weight of the entire composition, it is not preferable because the chemical reaction product with the catalyst component is inadequate, and if it is 15% by weight or less, it is not preferable because it significantly lowers the poby effect. Therefore, the content of the carbonizing agent is used in 5 to 15% by weight.

One of the components, the catalyst for promoting reaction, forms a polymer layer by chemical reaction with a carbonizing agent. Suitable chemicals include inorganic acids, ammonium polyphosphate, amine / amide phosphate, amine sulfate, melamine phosphate, dimelamine phosphate, melamine fire Phosphate (Melamine pyrophosphate) and tricresyl phosphate (Tricresyl phosphate) and the like. In the present invention, the ammonium polyphosphate surface-treated to be excellent in water resistance as a catalyst which decomposes upon exposure to heat to form a flame retardant gas and acid and reacts with a carbonizing agent to form a polymer. Use by mixing.

Surface treatment is carried out using an epoxy resin or melamine resin with ammonium polyphosphate. The water solubility of the surface-treated ammonium polyphosphate is 0.5% by weight or less, the chain length represented by the number of bonds of the repeating unit is 1000 or more, and the phosphorus content is It is 25 weight% or more.

If the composition of the catalyst is 15% by weight or less, based on the total weight of the total composition, the chemical reaction product with the carbonizing component is insufficient, and if it is 35% by weight or less, it is not preferable because it significantly lowers the nasal effect. Therefore, the content of the catalyst is used at 15 to 35% by weight.

Another major component, blowing agent, plays a direct role in generating the gases necessary to expand the polymer layer. Such blowing agents include melamine, guanidine, urea, glycine, dicyandiamide, neutralized phosphoric acid ester, dioctylphthalate, Diazealate, a diisopentylphthalate polymer, etc. are mentioned. If the content of the blowing agent is less than 5% by weight based on the total weight of the total composition, the generated gas pressure is too low to be insufficient to expand the polymer layer is not preferable, if the content of more than 15% by weight is too high It is not preferable because it will break the polymer layer. Therefore, the content of the blowing agent is used in 5 to 15% by weight.

In addition, it is a special refractory pigment that contributes to the physical adhesion inside the coating layer and the effect of forming the ceramic layer, and has excellent effects such as ceramic pigments, porous silicon pigments, optical fiber materials, glass filaments, metal oxides, and haemulseok. Has If the content of the special refractory pigment is less than 2% by weight based on the total weight of the total composition, it is not preferable to exhibit a special refractory effect, it is not preferable, if more than 10% by weight will significantly reduce the nasal effect. Therefore, the content of the special refractory pigment may be used 2 to 10% by weight.

In the present invention, the impact resistance of the refractory coating material by using a fiber material (about 5 microns in diameter) and a length of about 300-1,000 microns (μm) as a special refractory pigment alone or in combination with other special refractory pigments In addition, the fiber optic material is present inside the carbonized layer when exposed to a flame to form a more rigid foam insulation layer, thereby overcoming the disadvantages of the conventional aqueous fireproof coating material which loses the foam insulation layer at high flame speed. And it was possible to prepare an aqueous based nasal coating composition with significantly improved fire resistance.

In addition, the function, which is a material added in the production of the paint, contains 2 to 10% by weight, based on the total weight of the total composition, of the colored pigment required for the general aqueous paint. If the content of the colored pigment is 2% by weight or less, it is not preferable because the coloring power is insufficient, and if it is 10% by weight or more, it is not preferable because it significantly lowers the nasal effect. In addition, 2% by weight to 6% by weight, based on the total weight of the total composition, in order to impart the optimum paint state and coating performance in a small amount, at an appropriate ratio, with additives such as extender pigments, surface leveling agents, dispersants, antifoaming agents, plasticizers and stabilizers, etc. It is contained by weight%.

The present invention also provides an aqueous vinyl acetate-silane copolymer, an aqueous ethylene-vinylacetate copolymer, an aqueous butyl acrylate copolymer, and an aqueous vinyl acetate as a colorant. 10-30% by weight of an aqueous resin composed of at least one selected from the group consisting of vinylacetate-acrylate copolymers, 5-15% by weight carbonizing agent, 15-35% by weight of ammonium polyphosphate surface-treated as a catalyst, blowing agent 5-15% by weight, an aqueous based aerated refractory coating composition comprising 2-10% by weight of the optical fiber, 2-10% by weight of the colored pigment, 2-6% by weight of the additive as a heat insulating pigment, and heat-insulated during heating Provided are aerated fireproof coatings that can lead to layers.

When the composition is coated on the main steel structure to have a dry coating thickness of 0.8-1.4 mm to form a fireproof coating material, it has desirable fire resistance performance and water resistance.

The coating properties and fire resistance thereof will be described in more detail below with examples and comparative examples, but the scope of the present invention is not limited thereto. In the following Examples and Comparative Examples, the content means parts by weight.

Example 1

1.2 parts of Triton X-100 (manufactured by Union Carbide) as a dispersant in water, 3.7 parts of ethylene glycol (Ethylene Glycol) as a cryoprotectant, and a deformer HDW (Defoamer HDW manufactured by Hongsan Chemical) as an antifoaming agent Add 0.3 parts and stir at low speed until uniform. When it reaches a uniform state, 20.7 parts of ammonium polyphosphate surface-treated with melamine resin in low-speed stirring state, 8.1 parts of dipentaerythritol, 9.5 parts of melamine, 5.7 parts of titanium oxide (TiO ₂ ) as a coloring pigment, as a special refractory pigment Insert 3.7 parts of the fiber material and disperse at high speed. Add 0.1 part of Skyside PG-520 (Skycide PG-520, manufactured by SunKyung Industry Co., Ltd.) and 22.1 parts of vinyl acetate-acrylate resin as a preservative, and stir at low speed to a uniform state, and use 0.4 part of thickener to obtain a viscosity of 100-120 KU. The adjusted water based forbidden fire-resistant coating material is manufactured.

Example 2

20.7 parts of surface-treated ammonium polyphosphate, 9.5 parts of melamine, 22.3 parts of melamine pyrophosphate, 4.8 parts of neutralized phosphate ester compound, 6.5 parts of melamine 6.5, vinylacetate-silane resin instead of 22.1 parts of vinylacetate-acrylate resin 18.7 Except for using the water-based aqueous forbidden fire-resistant coating material in the same manner as in Example 1.

Example 3

Instead of using 8.1 parts of dipentaerythritol, 5.7 parts of titanium oxide (TiO ₂ ) as a coloring pigment, 3.7 parts of a mineral fiber material as a fire-resistant special pigment, and 22.1 parts of vinyl acetate-acrylate resin, pentaerythritol The same method as in Example 1 except for using 13.7 parts, 3.4 parts of titanium oxide (TiO ₂ ), 2.2 parts of porous ceramic pigments, 1.6 parts of optical fiber materials, and 18.7 parts of vinyl acetate-silane-based resin as refractory special pigments. Aqueous forbidden fire-resistant coating material is manufactured by this.

Comparative Example 1

A forbidden fire resistant coating coating composition is prepared according to the method disclosed in the present patent application No. 96-29553. Specifically, 20.7 parts of ammonium polyphosphate surface-treated with melamine resin, 20.7 parts of untreated ammonium polyphosphate as a refractory special pigment, and silica which is a general diatomaceous earth pigment as a refractory special pigment. Except for using 3.7 parts of # 325 (Silica # 325, manufactured by Kyungin Chemical Co., Ltd.), an aqueous-based anti-fire-resistant coating material was prepared in the same manner as in Example 1.

Comparative Example 2

A forbidden fire resistant coating coating composition is prepared according to the method disclosed in the present patent application No. 96-29553. Specifically, instead of using 18.7 parts of vinyl acetate-silane-based resin, 3.7 parts of optical fiber material as a refractory special pigment, 18.7 parts of vinyl acetate-based resin and 3.7 parts of porous ceramic pigment are used as a refractory special pigment. In the same manner as in Example 2, an aqueous based azeotropic refractory coating paint was prepared.

The compositions of Examples 1-3 and Comparative Examples 1-2 of the present invention were coated to have a dry coating thickness of 0.8-1.4 mm, and the results of water resistance and fire resistance of the dried coating film are shown in Table 1 below.

Performance Test Results of Waterborne Abrasive Fire-Resistant Coatings division Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Remarks Water resistance (hours) 168 192 240 96 72 25 ℃ water immersion test Fire resistance (℃) 15 minutes 30 minutes 45 minutes 60 minutes 242332403487 239331395474 260355420504 253357483552 255358452535 Heating condition ¹⁾

Note ¹⁾ Temperature change with time change of heating condition

Elapsed time (minutes) 5 10 20 30 40 50 60 120 180 240 Heating temperature (℃) 540 705 795 840 880 905 925 1010 1050 1095

As shown in the above table, the aqueous based nasal refractory coating composition according to the present invention has the following distinct advantages.

First, by using vinylacetate-silane copolymer as the film-forming main resin or by using ammonium polyphosphate surface-treated as a catalyst among the potash components, the conventional water-based forbidden fire-resistant paint It has a much better water resistance.

Second, since it does not contain any halogen, it does not emit harmful gases in case of fire.

Third, the entire composition is optimally blended so as to improve the potting effect, and by using a special refractory pigment such as a fiber material (Mineral fiber) to form a solid foam insulation layer when exposed to flame, conventional water-based forbidden fire-resistant paint It has better fire resistance.

Claims (6)

As a colorant, an aqueous vinyl acetate-silane copolymer is used alone, or the aqueous vinyl acetate-silane copolymer is used as an aqueous ethylene-vinylacetate copolymer, and an aqueous butyl acrylate. 10-30 wt% of aqueous resin obtained by mixing with (Butyl acrylate) copolymer or aqueous vinyl acetate-acrylate copolymer, 5-15 wt% of carbonizing agent, ammonium poly surface-treated as catalyst 15-35% by weight of phosphate, 5-15% by blowing agent, 2-10% by weight of optical fiber as heat-insulating pigment, 2-10% by weight of colored pigment, 2-6% by weight of additive. . (delete) The method of claim 1, wherein the carbonizing agent is sorbitol (Sorbitol), pentaerythritol (Pentaerithritol), dipentaerythritol (Dipentaerithritol), tripentaerithritol, methylol melamine (Methylol melamine), lysosi Resorcinol, Linseed oil (Linseed oil), characterized in that the composition used alone or in combination. According to claim 1, Melamine, Guanidine, Urea, Glycine, Dicyandiamide, Neutralized phosphoric acid ester, Dioctyl as the blowing agent A composition comprising the use of phthalate, diazealate, and diisophenylphthalate polymers alone or in combination. As a colorant, an aqueous vinyl acetate-silane copolymer is used alone, or the aqueous vinyl acetate-silane copolymer is used as an aqueous ethylene-vinylacetate copolymer, and an aqueous butyl acrylate. 10-30 wt% of aqueous resin obtained by mixing with (Butyl acrylate) copolymer or aqueous vinyl acetate-acrylate copolymer, 5-15 wt% of carbonizing agent, ammonium poly surface-treated as catalyst Paint an aqueous based anti-foam fireproof coating composition comprising 15-35 wt% phosphate, 5-15 wt% blowing agent, 2-10 wt% optical fiber as heat insulating pigment, 2-10 wt% colored pigment, and 2-6 wt% additive. And a fire resistant coating material which is formed by heating and has a forbidden property which can induce a heat-insulating forbidden layer during heating. The aqueous based nasal refractory coating material according to claim 5, wherein the composition is formed by coating the main steel structure to have a dry coating thickness of 0.8-1.4 mm.