KR101589060B1 - Environment Friendly and None Toxic Intumescent Fire-Retardant Paint - Google Patents

Abstract

FIELD OF THE INVENTION The present invention relates to a flame-retardant flame-retardant fire-retardant paint, and more particularly, to a flame-retardant flame-retardant fire-retardant paint which is applied to trees and steel structures used for building materials, It is an environmentally friendly and non-toxic fire-resistant fire-resistant paint that can prevent damage to buildings by preventing the heat from being transferred to the surface to be coated for a long time, will be.

Description

Environment Friendly and Non-Toxic Intumescent Fire-Retardant Paint

FIELD OF THE INVENTION The present invention relates to a flame-retardant flame-retardant fire-retardant paint, and more particularly, to a flame-retardant flame-retardant fire-retardant paint which is applied to trees and steel structures used for building materials, It is an environmentally friendly and non-toxic fire-resistant fire-resistant paint that can prevent damage to buildings by preventing the heat from being transferred to the surface to be coated for a long time, will be.

Due to the development of fire-fighting industry technology, fire-fighting construction materials or fire-fighting objects are protected electrically, mechanically or chemically. However, the occurrence of fires is more frequent and more frequent.

The government has legally set the system so that only objects that can cause severe damage in the event of a fire or difficulty in extinguishing the fire can be flame-retarded or used only in a fire-resistant function.

Despite these policy efforts, many buildings are still vulnerable to high temperature heat and flames, especially those where refrigeration warehouses, volatile material handling areas, .

A flame-retardant paint can block flames and high-temperature heat, but the burning of flame-retardant components releases toxic gases, making it more difficult to survive. In other words, fire hazards due to toxic gases are higher than fire accidents due to fire. Also, even if there is a flammable substance, it can not block the fundamental heat, and the heat that is conducted causes deformation of the object to be coated and causes internal fire.

In addition, since the heat transferred to the inside is not easily released, the H beam, which is the base of the skeleton of the building, is melted to cause the collapse of the building.

Especially, it has been found that organic flame retardant materials cause more human casualty damage due to the increase of accommodation and public facilities due to various life changes. Therefore, it is a tendency to study inorganic or aqueous flame retardant materials in recent years.

Korean Patent Registration No. 10-0495159 (registered on Jun. 22, 2005, hereinafter referred to as "registration certificate") is a resin composition comprising 18-36% by weight of a chlorinated rubber resin having a chlorine group content of 64-66% by weight and a butylphenol formaldehyde component 5 to 10% by weight of a vinyl copolymer resin obtained by copolymerizing vinyl chloride and isobutyl ether, 5 to 10% by weight of liquid paraffin, 0.3 to 0.6% by weight of a heat stabilizer, 0.2 to 8% by weight of a defoaming agent, 0.4% by weight of an organic solvent and 40-50% by weight of an organic solvent, wherein the phenolic resin is a solid-phase compound having a glass transition temperature of about 70 DEG C and an acid value of 40-60, Lt; RTI ID = 0.0 > 80 C. < / RTI > The above-mentioned registered fire-proofing material is an organic flame-retardant paint, which has a flame-retarding effect to prevent the breakage of the paint by delaying the heat transfer to the paint by foaming by heat generated in the fire. However, toxic flame- do.

Korea Patent Publication No. 10-2003-0018038 No. (published 04/09/2003, the "public key" means any) is a sodium silicate _{(NaO · nSiO 2 · xH 2} O) a binder, and boric acid to the resist printing function (H ₃ BO ₃ ) or borax (Na ₂ B ₄ O ₇ · 10H ₂ O) having a similar function is mixed with 10% of sodium silicate and stirred to prepare an inorganic fire retardant paint or fireproof adhesive made of an aqueous solution. Since the open gun does not burn but does not block the heat, a large amount of heat is conducted to the inside of the coated film, resulting in a fire inside.

Accordingly, the fire-resistant flame-retardant fire-

The object of the present invention is to prevent the generation of toxic gas due to the combustion of paints when a fire occurs and prevent the fire and heat from being transferred to the surface of the object, thereby preventing the occurrence of fire inside the object and delays deformation of the structure due to heat.

In order to achieve the above object, the fire-

In the refractory paint, 30 to 120 parts by weight of graphite may be mixed with 100 parts by weight of the vinyl acetate resin, and 80 to 120 parts by weight of water may be further mixed to emulsify the vinyl acetate resin.

Further, 10 to 50 parts by weight of zinc borate may be further mixed with the refractory paint as a flame retardant, or 1 to 3 parts by weight of titanium dioxide may be further mixed with an insulating material. The graphite used herein is preferably one having passed through 50 to 100 mesh.

The fire-resistant flame-retardant fire-resistant coating material of the present invention by the above-

It is possible to provide a non-toxic refractory coating by simply mixing and stirring the materials without performing a complicated chemical reaction.

In addition, it is possible to reduce the construction time and manufacturing cost by providing it as a water paint, and it is possible to minimize the aftereffects caused by the damage of the person and the gas inhalation in case of fire or fire suppression due to no toxic gas.

Further, the flame retardant and the insulating material may be further mixed to minimize the heat transfer to the internal structure together with the formation of the heat insulating layer by the graphite, thereby increasing the refractory time. In particular, when using titanium dioxide, which is an insulating material, titanium dioxide reflects the heat transferred to the object to be transferred to the graphite, thereby improving the foamability of the graphite, thereby providing a thermal insulation effect by rapid foaming, It is possible to prevent large accidents caused by building collapse.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the accompanying drawings. It should be understood, however, that the appended drawings illustrate only the contents and scope of technology of the present invention, and the technical scope of the present invention is not limited thereto. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the technical idea of the present invention based on these examples.

Generally, a foamable refractory coating is formed to have a coating layer formed when it is exposed to a flame or heat, and the coating layer is made of 100% carbon, so that it can no longer be burnt and thus the coating can be protected from flame and heat for a certain period of time.

These foam fire-retardant and fire-resistant paints are flame-retardant gases generated from flame and heat to the melting stage in the event of a fire. They are swollen inside the paint and increase the expandability of the foam material. As a result, Should be able to form.

The paint materials for forming the fire-proof and heat-insulating layer, which are most important in the conventional foamable fire-resistant paints, are classified into a film-forming resin, an acid catalyst, a carbide forming agent, a foaming agent, a pigment, an additive and a solvent. The manufacturing cost is increased.

Accordingly, it is an object of the present invention to provide a flame-retardant refractory coating which can produce a flame-retardant refractory coating using only a film-forming resin, a foaming agent, and an additive, thereby simplifying the manufacturing process and maintaining the flame retardant effect.

As the film-forming resin of the present invention, a vinyl acetate resin is used. The polyvinyl acetate resin is colorless, tasteless, odorless, harmless, and has a high temperature sensitivity, and is softened at 40 ° C with adhesive property, and is excellent in workability at room temperature. In addition, emulsification can be easily performed by diluting with water, and the viscosity can be easily controlled according to the degree of dilution with water.

In the present invention, such a vinyl acetate resin is emulsified by mixing with water. That is, an emulsified vinyl acetate resin is used by mixing 80 to 120 parts by weight of water with respect to 100 parts by weight of the pure vinyl acetate resin. At this time, when the mixing of the water is less than 80 parts by weight, the viscosity is so high that a uniform coating film is difficult to form. When the mixing ratio of the water is more than 120 parts by weight, the viscosity is low.

For example, when a material whose surface is not constant such as cement or wood is applied, the amount of water is increased so that the resin easily penetrates into the groove of the surface to form a coating film. When a smooth material such as a metal is applied, It is preferable to reduce the mixing amount to increase the viscosity so as to form a uniform coating film.

In addition, various organic solvents can be used to control the viscosity of the vinyl acetate resin.

Next, graphite is used as the blowing agent. When the graphite has a plate-like structure, the volume of the gas or liquid between the layer and the layer during heating expands, and the graphite also expands, so that the graphite can be expanded to about 20 to 100 times.

Therefore, when graphite is used as a foaming agent for paints, the graphite is expanded by heat to form a heat insulating layer, thereby increasing the space between the external heat and the object to be exposed and providing a heat insulating function so that high heat due to fire is transferred to the object It is possible to minimize the damage of the object to be exposed by heat. That is, when a fire occurs, the temperature between the coated surface and the coated surface increases due to the high temperature, and the gas is generated by the action of the acid catalyst. The generated gas is filled in the resin by the resin layer for a predetermined time, The blister on the coated surface is blown out, and at the same time, the expandable graphite is expanded to form a heat insulating layer as a heat insulating film. The expansion of the graphite occurs simultaneously at a temperature of 200 to 300 DEG C, and foaming continues until graphite, which is a foaming component, is consumed therein. As time passes, the thickness of the heat insulating layer, which blocks the flame and heat, increases.

As the graphite used as the foaming agent, graphite or high crystalline graphite having a plate shape can be used. In order to increase the expansion efficiency, graphite expanded graphite can be used.

The graphite preferably has a size of 50 to 100 mesh. The graphite having passed through the 50 mesh or less has a large thickness, which is excessively protruded from the coated surface at the time of coating and has a disadvantage in that it can not be uniformly mixed when mixed with the resin. The graphite having passed through 100 mesh or more has a small thickness Since the degree of foaming is low, the thickness of the heat insulating layer is formed to be thin and the adiabatic efficiency is low. Therefore, it is preferable to use graphite having passed the mesh range.

In addition, the present invention can mix zinc borate as a flame retardant. The zinc borate is a flame retardant harmless to the human body and also provides a flame retardant effect as well as an inhibitory effect. Such zinc borate can be used as an accelerator for promoting char formation and maintains the crystal at a high temperature of 250 to 280 ° C to provide a flame retarding effect.

In addition, the present invention can further incorporate titanium dioxide (TiO ₂ ) as an insulating material. The titanium dioxide promotes and strengthens the formation of a carbonized layer when the coating film of the refractory paint is exposed to fire, thereby promoting the formation of the foamed layer during heat transfer by fire and enhancing the fire resistance performance in normal times. do. In addition, since the titanium dioxide is resistant to external UV, provides a purifying effect for decomposing noxious gas components upon UV irradiation, has antibacterial ability, and is also excellent in insulation, so that the present invention can increase the effect It is used for the purpose of.

The anatase type and the rutile type may be used as the crystal form of the titanium dioxide, either one of the two crystalline forms or a mixture of the two types can be used. For the purpose of increasing the photocatalytic effect, One or both types may be used in combination.

The fire-resistant flame-retardant fire-retardant paint of the present invention using the above-

The graphite can be produced by using vinyl acetate resin as a film-forming resin and using graphite as a foaming agent. The graphite has a size of 50-100 mesh.

The mixing ratio of the vinyl acetate resin and the graphite is 30 to 120 parts by weight of graphite mixed with 100 parts by weight of the vinyl acetate resin. When the amount of the graphite is less than 30 parts by weight, the dispersibility of the graphite is low, so that it is difficult to form a heat insulating layer at the time of foaming. When the graphite is mixed at a weight of 120 parts by weight or more, excessive blackening occurs, It is difficult to form the coating, and a disadvantage that a part of the coating is exposed may be generated.

In order to control the viscosity of the vinyl acetate resin, 80 to 120 parts by weight of water may be further mixed to effect emulsification. The mixing of the water may be varied depending on the material of the material to be coated. When the material is a metal material, water is mixed into about 90 parts by weight, and when the material is irregular, It is possible to prevent the air layer from being formed between the coated film and the resin film by controlling the viscosity of the vinyl acetate resin by mixing.

In the refractory paint obtained by mixing the vinyl acetate resin and the graphite, 10 to 50 parts by weight of zinc borate as a flame retardant may be added to 100 parts by weight of the vinyl acetate resin. When the zinc borate is mixed in an amount of 10 parts by weight or less, the flame retardant effect of the refractory paint is insufficient. When the mixture is blended at a ratio of 50 parts by weight or more, the degree of improvement of the flame retardancy is insufficient and the coating film is unevenly formed. .

The refractory coating material of the present invention may further contain 1 to 3 parts by weight of titanium dioxide as an insulating material with respect to 100 parts by weight of the vinyl acetate resin. When the titanium dioxide is mixed in an amount of 1 part by weight or less, the insulating effect is insufficient. When the titanium dioxide is mixed in an amount of 3 parts by weight or more, the cost is increased excessively. desirable.

Hereinafter, refractory coatings according to the present invention will be described in detail with reference to examples.

1) Experimental Example 1 (Measurement of fire resistance time of a fire-retardant paint composed of vinyl acetate resin and graphite)

First, the compounding examples of Examples 1 to 3 and Comparative Examples 1 and 2 are shown in Table 1 below. (Unit: parts by weight) In the mixing of the vinyl acetate resin and the graphite, the same amount of water as the vinyl acetate resin .

Vinyl acetate resin black smoke Example 1 100 40 Example 2 100 80 Example 3 100 100 Comparative Example 1 100 20 Comparative Example 2 100 140

The test specimen was prepared by applying a refractory coating composition having the composition shown in Table 1, with an H-shaped steel (300 × 300 × 10 × 15) having a length of 3000 mm.

Each specimen was tested for fire resistance by KS F 2257-1 and KS F 2257-7 (fire resistance test method for building structural members). The heating was carried out by the heating temperature curve of KS F 2257-1.

It was judged that the refractory performance was lost even when the average temperature of the steel of the specimen was kept below 540 ° C and the maximum temperature of the steel was kept below 650 ° C, exceeding one of the two criteria.

As a result of measuring the refractory times of Examples 1 to 3 and Comparative Examples 1 and 2, the refractory time of Example 2 was the longest at 135 minutes, and Examples 1 and 3 also provided refractory times of more than 124 minutes. Also, Comparative Example 1 was found to be less than 90 minutes, and Comparative Example 2 was measured to be about 125 minutes.

As a result of confirming the application surface by heating, it was found that the thickness of the heat insulating layer due to the expansion was relatively weak and the heat insulating end was not formed well in Comparative Example 1. In Comparative Example 2, the thickness of the heat insulating layer was thicker than that in Example 2, Cracks are generated in the heat insulating layer by the heat insulating layer, and the heat shielding effect is decreased according to the thickness of the heat insulating layer.

2) Experimental Example 2 (Measurement of fire resistance time of fire-retardant paints made of vinyl acetate resin, graphite and flame retardant)

In the first experimental example, the mixing amount of graphite was fixed at 80 parts by weight, and the amount of zinc borate, which is a flame retardant, was changed as shown in Table 2 to form a refractory paint.

Vinyl acetate resin black smoke Zinc borate Example 4 100 80 20 Example 5 100 80 30 Example 6 100 80 40 Comparative Example 3 100 80 5 Comparative Example 4 100 80 60

The refractory paint formed with the formulation shown in Table 2 was subjected to the fire resistance test in the same manner as in the first experimental example.

As a result of measuring the refractory time of Examples 4 to 6 and Comparative Examples 3 to 4, refractory performance was improved by providing a refractory time of 130 to 145 minutes except for Comparative Example 3.

In Comparative Example 4, although the flame retardant was mixed excessively, it was found that the flame retardancy was almost similar to that of Example 5 or 6. In Comparative Example 3, the improvement effect by the flame retardant mixture was not shown.

3) Experimental Example 3 (Measurement of fire resistance time of a fire-retardant paint composed of vinyl acetate resin, graphite, zinc borate and an insulating material)

In the second experimental example, the mixing amount of titanium dioxide, which is an insulating agent, was changed as shown in Table 2 under the condition that the mixing amount of zinc borate was fixed to 30 parts by weight to form a refractory paint.

Vinyl acetate resin black smoke Zinc borate Titanium dioxide Example 7 100 80 30 One Example 8 100 80 30 2 Example 9 100 80 30 3 Comparative Example 5 100 80 30 0.5 Comparative Example 6 100 80 30 4

The refractory paint formed with the formulation shown in Table 3 was subjected to the fire resistance test in the same manner as in the first experimental example.

As a result of measuring the refractory times of Examples 7 to 9 and Comparative Examples 5 to 6, the refractory time was increased to about 5 minutes except for Comparative Example 5, and the formation time of the heat insulating layer by graphite foaming was shortened. In Comparative Example 5, the increase or decrease in the refractory time was insufficient.

Therefore, when the insulating material is mixed in an amount of 1 part by weight or more, the time for forming the heat insulating layer due to the expansion of the graphite due to the thermal reflection of the insulating material can be shortened and the heat transfer to the inside of the test object, . ≪ / RTI >

Claims (5)

In the refractory paint,
30 to 120 parts by weight of graphite of 50 to 100 mesh size, 80 to 120 parts by weight of water, 10 to 50 parts by weight of zinc borate as a flame retardant and 1 to 3 parts by weight of titanium dioxide as an insulating agent are mixed with 100 parts by weight of vinyl acetate- Wherein said fire-resistant flame-retardant paint is a flame-retardant fire-resistant paint.
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