KR20010097777A - Light weight fire resistive covering materials and method for manufacturing the same - Google Patents

Abstract

The present invention relates to a lightweight fireproof coating and a method of manufacturing the same, which is applied to the surface of concrete or steel in order to increase the thermal insulation of a construction structure in general, and to prevent the strength or collapse of the structure in the event of a fire. The glass or sediment of Siras mineral heated to 900 to 1100 ° C. and foamed with either foam or pearlite foam, and an appropriate amount of adenite mineral fiber, calcium hydroxide and calcium carbonate were mixed for 1 to 3 minutes by a forced stirring mixer. Forming a mixture, and adjusting the primary mixture such that an appropriate amount of water and a resin solid content of about 50%, and mixed with an appropriate amount of surfactant and other additives, such as EVA (ethylene vinyl acetate resin) emulsion or acrylic resin MMA (meth methyl acrylate), BAM (butyl acrylate) so that the solid content is about 50% After the pre-emulsion by the addition of a nomer), any one of the acrylic resin emulsion prepared by mixing an appropriate amount of surfactant and other additives, etc. was stirred with a forced stirring mixer for 1 to 3 minutes to form a lightweight fireproof coating material. It is characterized by consisting of.

Description

Lightweight fireproof coating and its manufacturing method {LIGHT WEIGHT FIRE RESISTIVE COVERING MATERIALS AND METHOD FOR MANUFACTURING THE SAME}

The present invention relates to a lightweight fireproof coating material and a method for manufacturing the same, which not only ensures a thermal insulation function for energy saving of a construction structure, but also achieves rationalization of construction at a light weight, reduces crack occurrence, improves watertightness, and concrete or steel frame. The present invention relates to a lightweight fireproof coating material having a merit of overcoming the disadvantages of the existing fireproof coating material, such as not only ensuring sufficient adhesive force with an asbestos containing harmful asbestos and not harmful to the human body.

In the conventional construction site, the law ordinance is provided to install fireproof coating on the frame surface in order to prevent significant reduction of structural strength or collapse in the event of fire. Therefore, many fireproof coatings have been developed and used before. These fireproof coatings are basically composed of binders that combine materials and inorganic aggregates to improve the fire resistance. Representative examples of such fireproof coatings are fire retardants, which are sprayed with a mixture of cement, calcium silicate, and asbestos, which are inorganic aggregates. Cladding has been the most widely used.

However, the fireproof coating material used by mixing such asbestos, although the fire resistance is excellent, the adhesion to the frame is inferior, the strength of the inhalation of moisture in the air during use, the strength is reduced, or if the strength is reduced, the adhesion strength is dropped, etc. Defects frequently occur, and in particular, asbestos generated from asbestos has recently been found to be harmful to human health and the environment, and its use is limited.

Therefore, as a part of the plan to replace the asbestos constituting the conventional fire resistant coating material, a lot of similar performance, that is, a fire resistant coating material using rock wool has been developed to enhance the tensile strength of the fire resistant coating material, Eggplants do not overcome the defects of durability, such as poor adhesion to the framework, moisture absorption.

On the other hand, in recent years, the development of fire-resistant coating materials to overcome these shortcomings has been actively progressed, in order to improve the performance of the additives added to increase the tensile or bonding strength, fire-resistant coating materials incorporating plaster in addition to conventional cement and rock wool It is developed and used. However, the moisture present in the plaster as water is slowly evaporated due to the rapid temperature rise in the fire, and cracks are generated in this part, and the fire is transmitted to the flame structure through the cracks, so that the fire resistance is rapidly degraded. Indicates. In particular, the surface of the steel frame basically can not expect the adhesion of such a material, in severe cases dropping occurs also occurs.

In addition, in order to improve the fire resistance, the aggregate is mixed with one or more of natural aggregates such as pumice, diatomaceous earth, silica powder, aluminum hydroxide, calcium carbonate, fly ash, etc. to contribute to improving the fire resistance, but other performances, for example, It does not contribute to the insulation performance and the weight reduction which are the basis of fire resistance.

In addition, as a special case, a fire-resistant paint is applied that applies the thermal properties of organic synthetic polymer materials that undergo foaming at high temperatures and carbonizes into ceramics, and has excellent adhesion to concrete or steel that is framing. Fire resistance standards set by the, i.e., 3 hours of fire resistance has a shortcoming showing the fire-resistant performance not reach.

Accordingly, the present invention has been made in consideration of various measures that have been made in order to overcome the conventional problems as described above, the object of which is aluminum hydroxide and calcium carbonate and pearlite foam or syras mineral to further improve the weight reduction and heat insulation and fire resistance effect Filled with any one of the foams and adenite fibrous minerals that greatly improve the physical properties such as compressive strength and tensile strength, and improve the portland cement and watertightness, secure the adhesion to the frame and foam due to high temperature foaming, carbonation Either EVA resin emulsion or acrylic resin emulsion, modified to be paintable, is added with water and mixed with a mixer and then used universally in conventional construction sites such as brushes, brushes, trowels, rollers or sprayers. It is conventional just to apply it to the frame surface of concrete and steel frame It is to provide a lightweight fireproof coating and a method of manufacturing the same that can overcome the problems that the fireproof coating has, namely, environmental pollution, cracking, dropping, long-term durability and the like.

Therefore, in order to achieve the above object, the manufacturing method of the lightweight fireproof coating material of the present invention is any one of the foam or pearlite foam which is foamed by heating the Syras mineral, which is a Syras mineral volcanic glass sediment, to about 900-1100 ° C. in Portland cement. Mixing one and an appropriate amount of adenite mineral fiber, calcium hydroxide and calcium carbonate with a forced stirring mixer for 1 to 3 minutes to form a primary mixture, and mixing the primary mixture with water and resin solids of about 50%. EVA Methylene (methacrylate) and BAM (butyl acrylate monomer) are added to adjust the EVA (ethylene vinyl acetate resin) emulsion and acrylic resin solid content to 50%. After pre-emulsion, 1 to 3 of any one of the acrylic resin emulsion prepared by mixing an appropriate amount of surfactant and other additives, etc. During the stirring with a stirrer-mixer force comprises a step of a fireproofing paint on the lightweight framing surface.

In addition, the lightweight fire-resistant coating material of the present invention is any one of 24 to 60% of Portland cement and a pearlite foam or a Siras mineral foam which is a volcanic glass deposit deposited by heating at about 900 to 1100 ° C. with mineral powder having a specific gravity of 0.2 to 0.3. Either EVA resin emulsion or acrylic resin emulsion in which 15-30% of the adenite mineral fiber 20-30%, aluminum hydroxide 2-6%, calcium carbonate 0.5-2%, and a suitable amount of surfactant and other additives are mixed. It is made by adding 2.5 to 8%, and is made by mixing an appropriate amount of water thereto.

The lightweight fireproof coating material of the present invention made as described above and a manufacturing method thereof will be described in detail as in the Examples.

Example 1

15 to 30 of any foam foam obtained by heating a pearlite foam or a Siras mineral, a Siras mineral volcanic glass sediment, at about 900 to 1100 ° C. with 24 to 60% of portland cement and a mineral powder having a specific gravity of 0.2 to 0,3. %, Adenite mineral fiber 20-30%, aluminum hydroxide 2-6%, calcium carbonate 0.5-2%, and mixed for 1 to 3 minutes using a forced stirring mixer to mix the inorganic powders with different specific gravity evenly. After pre-emulsion, MMA (meth methyl acrylate) and BAM (butyl acrylate monomer) are added to the EVA resin emulsion or acrylic resin solid content which is mixed with an appropriate amount of surfactant and other additives to about 50%. 2.5 to 8% of an acrylic resin emulsion prepared by mixing an appropriate amount of surfactant and other additives is added, and mixed with an appropriate amount of water, the conventional construction site As the sole document that is universally used, trowel, brush, roller or lacquer ppum can create a lightweight fireproofing year with proper viscosity and can bar the concrete and steel surfaces.

The lightweight fireproof coating made in this way prevents water absorption and its dropout phenomenon, which are disadvantages of conventional fireproof coating materials, due to the adhesion and watertightness of an EVA resin emulsion or an acrylic resin emulsion on a concrete or steel surface. The excellent thermal insulation of foams or shirasu mineral foams contributes to improved insulation of buildings.

On the other hand, during a fire, EVA resin emulsion or acrylic resin emulsion is foamed and carbonized inside the fireproof coating material together with aluminum hydroxide and calcium carbonate to reach the high temperature of about 1,200 ℃, which is the estimated maximum temperature of the surface of the structure. In addition, the pearlite foam or the shiras mineral foam having a melting temperature of about 2000 ° C. mixed together prevents a sudden rise in temperature due to fire.

In particular, the adenite mineral fiber plays a role of supplementing the bonding strength between the minerals due to the carbonization of the EVA resin emulsion or the acrylic resin emulsion together with the cement hardened material to prevent the strength of the structure due to fire or to prevent cracking. It is possible to manufacture a lightweight fireproof coating having excellent heat resistance and physical properties.

Example 2

In the same formulation as in Example 1, when the amount or less of the portland cement is mixed in a range of 24 to 60%, the fire of either the EVA resin emulsion or the acrylic resin emulsion greatly contributes to the improvement of adhesion between materials. The function of the cement binder to compensate for the reduction in adhesion due to carbonation of the city can not be properly exhibited, such as defects such as cracking or dropping may occur, and the physical and fire resistant functions of the cement binder may not be exhibited.

On the contrary, when mixed in an exceeding range, the amount of addition of the inorganic material that complements the insulation and fire resistance performance constituting the present invention is relatively reduced, and thus, it is impossible to achieve a predetermined performance.

Example 3

In the same manner as in Example 1, in the present invention, when any one of the EVA resin emulsion or the acrylic resin emulsion is mixed in the range of less than 2.5%, aluminum hydroxide 2% and calcium carbonate 0.5%, the adhesive force is significantly lowered, such as dropping off. The defects occur, and in particular, the foaming reaction and the carbonation process at a high temperature of the aluminum hydroxide and calcium carbonate mixed together are insufficient, so that the fire resistance is poor.

On the contrary, when mixing in an excess range, harmful gases are generated during the carbonation process, or viscosity is increased, so that proper viscosity or flue required for construction cannot be obtained.

Example 4

In the same manner as in Example 1, in the present invention, in the range in which less than 20-30% of the adenite mineral fiber is added or not, sufficient tensile strength and crack dispersing effect cannot be obtained, and thus the fire resistance of the present invention in a high temperature environment due to fire It is not possible to suppress cracking caused by sudden moisture evaporation of the coating material, so that a large crack that can penetrate the fire can be created, and the heat resistance of the adenite mineral fiber can contribute to the fire resistance performance of the fireproof coating material of the present invention. There is a problem of becoming smaller.

Moreover, when used in the exceeding range, workability will fall remarkably and a homogeneous fireproof coating material cannot be completed, and there exists a possibility that a physical performance, for example, a tensile performance may fall.

Example 5

In the same manner as in Example 1, in the present invention, in the step of heating the Siras mineral, which is a volcanic glass deposit, to about 900 to 1100 ° C to form the Syras mineral foam, in the temperature range smaller than this, it contributes greatly to light weight or thermal insulation or fire resistance. Sufficient gas for obtaining the spherical foam into which the gas to be mixed is not generated is not generated, and spherical foam can not be produced, and the weight, heat insulation, or fire resistance are significantly reduced.

In addition, in the range exceeding, it is not possible to obtain a spherical foam having a uniform shape and size, and of course, when the foam having such irregular shape is used, the required strength for the lightweight fireproof coating material according to the present invention can be obtained. Rather, it absorbs moisture in the air and vaporizes when a fire occurs, causing a thermal explosion.

Accordingly, as shown in Examples 1 to 5, in Example 1 mixed at an appropriate ratio, the lightweight fireproof coating material having the most excellent properties was obtained, and as in Examples 2 to 5 with different mixing ratios, When the mixing ratio is less or more than the mixing ratio of the present invention due to the temperature range, the fire retardant performance is lowered or the physical performance or tensile performance is lowered. have.

Therefore, the fireproof coating material of the present invention improves the insulation function for energy saving of the construction structure by the lightweight fireproof coating material and a method of manufacturing the same, and achieves the rationalization of construction at light weight, and also prevents the decrease or collapse of the structural strength in the event of a fire. It can have a fire resistance performance to sufficiently overcome the problems with the conventional fire resistant coating material.

In addition, not only can be easily completed by using a brush, trowel, brush, roller or spraying machine used in the conventional construction site, but also economical efficiency can be secured at the same time, contributing to the reduction of construction cost.

Claims (2)

One or more of adenite mineral fibers, calcium hydroxide and calcium carbonate, which are foamed by heating Siras mineral, which is a Siras mineral volcanic glass sediment in portland cement, at about 900 to 1100 ° C. Mixing for 3 minutes to form a primary mixture, The primary mixture is adjusted to an appropriate amount of water and a resin solid content of about 50%, and an ethylene vinyl acetate resin mixture containing an appropriate amount of surfactant and other additives, or methmethylacrylic so that the acrylic resin solid content is about 50%. After pre-emulsion by adding acrylate and butyl acrylate monomer, any one of the acrylic resin emulsion prepared by mixing an appropriate amount of surfactant and other additives is stirred with a forced stirring mixer for 1 to 3 minutes to form a lightweight fireproof coating material. Method for producing a lightweight fireproof coating, characterized in that formed in the step of forming. According to claim 1, 24 to 60% of portland cement, 15-30% of the Shiras mineral foam obtained by heating and foaming the Shira mineral, which is a pearlite foam or volcanic glass deposit, with a specific gravity of 0.2 to 0.3, and heated to about 900 to 1100 ° C., 20-30% of adenite mineral fiber, Aluminum hydroxide 2-6%, 0.5-2% calcium carbonate, A lightweight fireproof coating material comprising 2.5 to 8% of an EVA resin emulsion or an acrylic resin emulsion by adding an appropriate amount of water.