KR20120075821A - Anti-flammable composite - Google Patents

Abstract

The present invention penetrates the flame retardant into the pores between the unfused particles of the styrofoam board manufactured using the expanded polystyrene beads, and then goes through the curing process of the flame retardant according to the drying process. (A) 5 to 90 parts by weight of clay based on 100 parts by weight of the total; (B) 5 to 90 parts by weight of the water glass; (C) 1 to 50 parts by weight of a flame retardant; (D) a polymer binder; 1 to 50 parts by weight (E) of the water-soluble flame retardant composition comprising 10 to 50 parts by weight of water, the present invention is a porous honeycomb structure of the organic-inorganic composite in the foamed styrene beads is melted by the external flame or heat and Prevents shrinkage and deformation, resulting in better flame retardant performance.

Description

Flame retardant composition {Anti-flammable composite}

The present invention relates to a flame retardant composition capable of preventing fire by preventing melting, shrinkage and deformation of the expandable polystyrene board by heat.

Effervescent polystyrene refers to styrofoam which is easily seen around us as a resin made by penetrating low-boiling hydrocarbon-based blowing agents (pentane, butane, etc.) into spherical polymer obtained by suspension polymerization of styrene monomer in water. This resin is used as a cushioning packaging material and a building insulation material through final processing through pre-exposure, aging, and molding. It is softened when heat is applied to the resin, which softens when the resin expands and expands the particles by the foaming agent. This is because foams having many independent cell structures (Cells) are formed and have specific properties of foamable resins such as cushioning, heat insulating, soundproofing, moisture proof, and lightweight. Despite these advantages, there is a problem that the building is easily burned down when a fire occurs in the building because it does not have fire resistance when the building insulation material is used.

Japanese Patent No. 0063334 uses a 1,2-polybutadiene resin and aluminum hydroxide as a main component, and a suitable amount of a light stabilizer and a foaming agent are mixed, followed by a photocrosslinking reaction using ultraviolet light to produce a foam having excellent heat resistance. It introduces. In addition, European Patent No. 0834529 introduces a technique for preparing flame retardant foamed styrene prepared by adding an appropriate amount of a flame retardant of a phosphoric acid compound and a water-releasing metal hydroxide. Although they are high in flame retardancy, they cannot be prevented from being melted by heat, which is an inherent property of organic matter, and thus, combustion of fluidized liquids generated on the inner surface of the panel cannot be extinguished when a fire occurs.

Clay is an aggregate of fine minerals mainly composed of aluminosilicates produced by weathering of rocks. It has colloidal properties and has plasticity and ion exchangeability when it has moisture. It hardens when dried, hardens when baked at high temperatures, and consists of a flat-meshed silicate group, which is used for raw materials such as ceramics, cement, and refractory materials. Research into polymer nanocomposites that increase the physical and mechanical properties by intercalating liquid polymers or intermixing with polymers in the state of layer exfoliation using their layered structure Is being studied.

Water glass is a high-viscosity liquid obtained by melting quartz powder or clay with soda ash or caustic soda and extracted with water, and many of n = 2 to 3 having a composition of Na ₂ O? NSiO ₂ ? XH ₂ O. Generally, silicates are soluble in water. Water glass has adhesiveness and hardens by drying, so it is used for adhesive, soap compound, silica gel, refractory cement, etc.

Korean Patent No. 100624139 introduces a flame retardant composition using water glass, a styrene acrylate copolymer binder, and flame retardant aluminum hydroxide and talc and gypsum. Here, the experiment using the lighter showed that the specimen remained almost intact even when heated for 30 seconds. When the steel plate was placed on the specimen and heated for 1 minute and 30 seconds, only the portion directly contacting with heat was deformed. This is because the water glass treated on the styrofoam hardens the styrene beads to prevent shrinkage.

However, the cured glass also has a disadvantage in that it melts and deforms by heat when it is above a certain temperature.

The present inventors are trying to improve the disadvantages of melting and shrinking or deforming the styrofoam, and the styrofoam by mixing the clay and water glass used as a raw material of ceramics and cement, and a flame retardant exhibiting flame retardant performance, a binder for binding to styrene beads As a result, the flame-retardant component was filled in the space between the styrofoam beads and then cured between the styrofoam beads by the drying process to form a porous honeycomb skeletal structure, which blocks the heat and heat resistance more than when using water glass alone. This excellent thing was confirmed and this invention was completed.

An object of the present invention to provide a flame retardant composition that can prevent fire by preventing the melting and shrinkage and deformation of the styrofoam by heat.

In order to achieve the above object, the present invention is (A) clay 5 to 70 parts by weight based on 100 parts by weight of the total; (B) 5 to 70 parts by weight of water glass; (C) 1 to 50 parts by weight of a flame retardant; (D) a polymer binder; It is possible to provide a water-soluble flame retardant composition comprising 1 to 50 parts by weight (E) 10 to 70 parts by weight of water.

According to the present invention there is an advantage to prevent fire by preventing the melting and shrinkage and deformation of the styrofoam by styrofoam treatment of the flame retardant composition.

Figure 1a is a heat resistance test picture of the styrofoam treated with the flame-retardant composition using clay, Figure 1b is a heat-resistance test picture of the styrofoam treated with the flame retardant composition using water glass.
FIG. 2A is a front photograph after a heat resistance test of a flame retardant composition using clay, and FIG. 2B is a top photograph of FIG. 2B.
3A is a front photograph after a heat resistance test of a flame retardant composition using water glass, and FIG. 3B is a top photograph of FIG. 3A.

Hereinafter, the present invention will be described in detail.

The present invention (A) 5 to 90 parts by weight of clay based on a total of 100 parts by weight; (B) 5 to 90 parts by weight of the water glass; (C) 1 to 50 parts by weight of a flame retardant; (D) a polymer binder; It can provide a water-soluble flame retardant composition comprising 1 to 50 parts by weight (E) 10 to 50 parts by weight of water.

The clay may be used alone or in combination from the group consisting of kaolinite, montmorillonite, elite, virohill knight, mica, gibbsite, but is not limited thereto.

It is preferable to use clays with a particle size of 180 mesh and viscosities of 20 cps, dry strength of 39 kgf / cm ² , water absorption of 18.1% at 1070, and shrinkage of 5.8%. The thermal and mechanical properties after drying can be enhanced by the ability to homogeneously mix with intercalation and exfoliation clay between layers.

The water glass may be used alone or in combination from the group consisting of sodium silicate, potassium silicate, calcium silicate, lithium silicate, but is not limited thereto.

The flame retardants include halogen-based flame retardants and non-halogen-based flame retardants. Halogen-based flame retardants include fluorine-based, chlorine-based and bromine-based flame retardants. Non-halogen-based flame retardants include hydride metal compounds, phosphorus compounds, nitrogen compounds, zinc compounds, molybdenum compounds, Silicon compounds, metal oxides, metal carbonates, metal nitrates, graphite and expanded graphite, feldspar, talc, gypsum, can be used alone or in combination from the group consisting of, but is not limited to these. It is preferable to use a metal compound which is an inorganic flame retardant without using carbon.

The polymer binder includes water-soluble polymers and copolymers that are miscible with the flame retardant materials and provide an increase in adhesion performance with polystyrene beads and water resistance, and binders in an emulsified form, such binders being polyvinylpyrrolidone , Polyvinylpyrrolidone-vinylacetate copolymer, polyvinyl alcohol, carboxymethyl cellulose, hydroxypropyl cellulose, starch, polyethylene oxide, polyacrylamide, polyacrylate, polystyrene-acrylate copolymer, poly Acrylic acid, cellulose-ether polymer, polyethyloxazoline, polyethylene oxide-ester copolymer, polyethylene oxide-polypropylene oxide copolymer, polyethylene oxide-polypropylene oxide-ester copolymer, polyethylene oxide-urethane copolymer, polyethylene oxide Polypropylene jade Id-urethane however it is used alone or in combination from the group consisting of a copolymer, and the like. It is preferable to use a polystyrene-acrylate copolymer, and more preferably to use a molecular weight of 100,000 or more.

Hereinafter, the present invention will be described in more detail with reference to the following examples and experimental examples. However, these are provided to facilitate the understanding of the present invention, and the technical scope of the present invention is not limited thereto.

<Example> Preparation of the flame-retardant liquid using a clay

 291 g of water glass (9.54% of sodium oxide, 30.55% of silicon dioxide, 40.99% of total solids) were added to 388 g of water, followed by stirring. 48 g of a late copolymer binder was added and stirred to prepare a flame retardant solution.

< Comparative example > Using water glass Flame retardant  Produce

In this embodiment, the solid content of water glass and clay is 31.3%. Similarly, 40.99% water glass was diluted to make 31.3% water glass content, and 873g was taken. Then, 79g of magnesium hydroxide was added and stirred, and 48g of styrene-acrylate copolymer binder was added to make 1000g total.

<Experiment>

The flame retardant compositions prepared in Examples and Comparative Examples, that is, flame retardants were penetrated by using a pressure of about 15 kg / cm &lt; 2 &gt; The board in which the flame retardant was penetrated was dried in a drying furnace such that moisture was 10% or less.

 Heat resistance test

Styrofoam prepared by injecting the flame retardant compositions prepared in Examples and Comparative Examples, respectively, was cut into 12 cm x 12 cm lengths to prepare specimens. Placing the flame on the central surface of the prepared specimen, and compared the degree of deformation of the specimen by heating by heating the specimen for 1 minute 30 seconds. As a result, as shown in FIGS. 1a and 1b, the flame did not penetrate the styrofoam in the case of the flame-retardant board using clay, but in the case of the water glass board made of the same solid content, it was observed that the flame penetrated by the flame. Observing in more detail, the clay-treated flame retardant board did not have penetrating phenomena on the surface, and shrinkage and deformation did not occur, and it was confirmed that the porous structure of the honeycomb was shown in the part without the foamed styrene beads (FIGS. 2A and FIG. 2). 2b). In the comparative example, as shown in FIGS. 3A and 3B, it can be seen that the surface of the specimen is penetrated by shrinkage and deformation due to heat.

Claims (5)

(A) 5 to 90 parts by weight of clay, based on 100 parts by weight of the total; (B) 5 to 90 parts by weight of the water glass; (C) 1 to 50 parts by weight of a flame retardant; (D) a polymer binder; 1 to 50 parts by weight (E) flame retardant composition comprising 10 to 50 parts by weight of water.
The flame retardant composition according to claim 1, wherein the clay can be used alone or in combination from the group consisting of kaolinite, montmorillonite, elite, virohill knight, mica, and gibbsite.
The flame retardant composition according to claim 1, wherein the water glass can be used singly or in combination from the group consisting of sodium silicate, potassium silicate, calcium silicate and lithium silicate.
The flame retardant of claim 1 includes a halogen flame retardant and a non-halogen flame retardant. The halogen flame retardant is a fluorine-based, chlorine-based, bromine-based flame retardant, and a non-halogen-based flame retardant. Flame retardant compositions which can be used alone or in combination from the group consisting of compounds, silicon compounds, metal oxides, metal carbonates, metal nitrates, graphite and expanded graphite, leadstone, talc, gypsum and dosonite.
The method of claim 1, wherein the polymer binder is polyvinylpyrrolidone, polyvinylpyrrolidone-vinylacetate copolymer, polyvinyl alcohol, carboxymethyl cellulose, hydroxypropyl cellulose, starch, polyethylene oxide, polyacrylic Amide, polyacrylate, styrene-acrylate copolymer, polyacrylic acid, cellulose ether ether, polyethyloxazoline, polyethylene oxide-ester copolymer, polyethylene oxide-polypropylene oxide copolymer, polyethylene oxide-polypropylene oxide -Flame retardant composition which can be used individually or in mixture from the group which consists of an ester copolymer, a polyethylene oxide urethane copolymer, a polyethylene oxide polypropylene oxide urethane copolymer, etc.

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