KR20170071029A - Incombustible binder for forming of glass long fibers insulating materials and preparation process of it - Google Patents

Abstract

The incombustible binder for molding a glass fiber insulation according to the present invention comprises 30 to 70% by weight of calcined powder, 3 to 10% by weight of an aqueous stabilizer solution, (CMC) system is added to water in an amount of 96 to 98% by weight based on 100% by weight of water, 1 to 3% by weight of bubbles, 0.5 to 2% by weight of a preservative and 25 to 65.5% by weight of water. By weight of a water-soluble powder of 2 to 4% by weight; 30 to 70% by weight of calcined powder, 3 to 10% by weight of the stabilizer aqueous solution, 1 to 3% by weight of the foam and 0.5 to 2% by weight of the preservative are added to 25 to 65.5% by weight of water and stirred.
The incombustible binder for forming the glass fiber insulation according to the present invention is applied to the glass fiber insulation material in a state of being dispersed evenly by the dispersing action of the cellulose while the contact between the silica particles is prevented by the foaming agent using the soda ash powder Since the calcined gypsum particles are dried and cured when they are compressed, the incombustibility of the heat insulating material can be improved and the strength can be improved without using the existing flammable organic-inorganic hybrid binder and the expensive flame retardant, and the flat, curved, Since the pipe type glass fiber insulation is formed by natural drying, the production cost can be reduced by omitting the drying process.
The incombustible binder for forming a glass fiber insulation according to the present invention has a non-flammable property of a high temperature insulation material due to the melting point (750 ° C) of the glass fiber due to the property of hardening of the calcined powder after drying It is satisfactory and environmentally friendly, and addition of a small amount of preservative to the binder prevents the cellulose used as a stabilizer from being decomposed by the microorganisms, thereby improving the adhesion and durability of the heat insulating material.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an incombustible binder for forming a glass fiber-reinforced thermosensitive insulation material,

The present invention relates to a nonflammable binder used for forming a glass fiber insulation material, and it relates to a nonflammable binder used for molding a glass fiber insulation material, which is provided with a nonflammable and natural hardening property The present invention also relates to a non-combustible binder for molding a glass fiber-reinforced thermally insulating material which is stable in use and is environment-friendly by adding a small amount of preservative to prevent deterioration of the binder, and a method for producing the same.

In general, various kinds of insulation materials such as polyethylene and polyurethane foam insulation, perlite, calcium silicate insulation and glass fiber insulation are used as insulation materials for piping and various kinds of insulated and refrigerated apparatuses in a general plant site or oil refineries, Among them, polyethylene or polyurethane foam insulation has a low melting point, which makes it unsuitable for high-temperature applications and deteriorates heat insulation, resulting in waste of energy, lower lifetime compared with piping and equipment, and frequent replacement.

In order to solve the above problems, the present applicant has proposed Korean Patent No. 274314, No. 522568, etc. on a method of manufacturing a heat-insulating pipe using a glass fiber mat, and the heat- The glass fiber mat which can withstand high temperature and can withstand a high temperature can be wound on a forming roller and press-formed to have a high heat-insulating property with a high density of about 180 to 220 kg / m 3, It is considered to be very suitable for insulation and insulation of various parts that require piping and building structures as well as incombustibility and sound absorption.

Generally, the glass fiber reinforced thermosetting material is manufactured by applying or impregnating a heat-resistant binder to a needle mat formed by needle-punching a mat made of glass fiber (E-Glass Fiber), pressing the needle mat into two or more layers, It can be manufactured in various forms such as board type heat insulation material and pipe type heat insulation material. Due to its characteristics, it can be lightened with high heat resistance and porosity, and each mat can be densified by needle punching, It can be widely used as a high-temperature insulation material.

Since the glass fiber is able to withstand a high temperature of about 750 ° C, the conventional glass fiber easily burns at a high temperature. Therefore, in order to use the glass fiber insulating material for thermal insulation of pipelines generating high temperatures, It is an important task to impart a property of a binder that can withstand and maintain a strong adhesive force as long as the lifetime of the glass fiber.

In order to overcome this problem, the present applicant has proposed a method of adding a flame retardant agent to a bentonite solution through a method disclosed in Japanese Patent No. 10-0941057 to obtain a cross-linking agent, and then a glass fiber- However, due to difficulties in the process of drying glass fiber products, increase in production cost due to the use of expensive flame retardant, degradation of cellulose by microorganisms used as acrylic adhesives and thickeners, and the like, , And the durability is lowered.

In addition, Korean Patent No. 10-1295248 and No. 10-1344442 disclose a conventional binder for molding a glass fiber reinforced thermosensitive insulation material by using a mixture of a yellow clay powder and bentonite, a cellulose, an acrylic adhesive, a flame retardant, It is possible to cut or have sufficient water repellency so as to have a smooth cutting surface while satisfying the adhesive property and strength reinforcing function between glass fiber needle mats during molding.

And 10-1333105 discloses a water-soluble acrylic thickener which replaces the thickening agent of the former cellulosic system, satisfying the thickening function, and there is no fear of deterioration in thermal insulation or weakening of strength due to unnecessary absorption of water, And Patent Document 10-1417243 discloses a method for preventing the change of physical properties of the inorganic binder solution coated with an inorganic binder solution containing aluminum phosphate capable of maintaining an optimal thermal conductivity value with a small amount of inorganic binder and exhibiting high compression and high strength Discloses a method for producing a glass fiber board.

In the present invention, the use of a calcined powder, a foaming agent, a preservative, etc. having a property of hardening and drying (crystallization reaction) after the addition of water is used, so that the incombustibility and natural hardening of the heat insulating material can be improved without using the existing flammable organic- And the strength can be improved. Thus, the present invention has been completed in view of the fact that an incombustible binder for forming a glass fiber-reinforced thermosensitive insulation material which is stable in use and is environment-friendly can be obtained.

Korean Registered Patent No. 10-0941057 (Registered Date: Feb. 01, 2010) Korean Registered Patent No. 10-1295248 (Registration date: 2013. 08. 05) Korean Registered Patent No. 10-1344442 (Registration date: December 17, 2013) Korean Registered Patent No. 10-1333105 (Registration date: Nov. 20, 2013) Korean Registered Patent No. 10-1417243 (Registration date: 2014. 06. 30)

An object of the present invention is to provide a non-combustible inorganic and organic binder and a natural flame retardant, which are dispersed in water, in a binder for bonding a glass fiber mat, It is possible to solve the problem that the adhesive strength and durability of the molded article caused by the degradation of the acrylic adhesive and cellulose by the conventional acrylic adhesive and the durability are lowered, A non-combustible binder for molding a stable glass fiber insulation material, and a method for producing the same.

The incombustible binder for forming a glass fiber insulation according to the present invention comprises 30 to 70% by weight of calcined powder; 3 to 10% by weight aqueous stabilizer solution; 1-3 wt% of foam; 0.5 to 2% by weight of an antiseptic; And water in an amount of 25 to 65.5% by weight.

According to a preferred embodiment of the present invention, at least one selected from the group consisting of anhydrous gypsum and anhydrous gypsum is used as the calcined gypsum powder, and the stabilizer solution is prepared by adding an alkali metal carboxymethyl cellulose (CMC ) Water-soluble powder is mixed with 2 to 4% by weight of a water-soluble powder of an alkali metal carboxymethylcellulose system, wherein the water-soluble powder of the alkali metal carboxymethylcellulose system is one or more substances selected from carboxymethylcellulose sodium (CMC Na) or carboxymethylcellulose potassium Is used. The preservative may be selected from the group consisting of creosote, tar, copper sulfate, zinc chloride, chlorophenol, boric acid, benzoic acid and sodium benzoate, either alone or in combination. Is used.

The manufacturing method of the incombustible binder for forming a glass fiber insulation material according to the present invention comprises preparing 96 to 98% by weight of water and 2 to 4% by weight of a water-soluble powder of alkali metal carboxymethyl cellulose (CMC) ; 30 to 70% by weight of calcined powder, 3 to 10% by weight of the stabilizer aqueous solution, 1 to 3% by weight of the foam and 0.5 to 2% by weight of the preservative are added to 25 to 65.5% by weight of water and stirred.

The incombustible binder for forming the glass fiber insulation according to the present invention is applied to the glass fiber insulation material in a state of being dispersed evenly by the dispersing action of the cellulose while the contact between the silica particles is prevented by the foaming agent using the soda ash powder It is possible to improve the strength and heat resistance of the heat insulating material without using the existing flammable organic-inorganic hybrid binder and the expensive flame retardant agent, and also to provide the flat, curved, and elbow type And pipe-type glass fiber-reinforced thermosetting insulating material are formed by natural drying, the production cost can be reduced by omitting the drying process.

The incombustible binder for forming a glass fiber insulation according to the present invention has a non-flammable property of a high temperature insulation material due to the melting point (750 ° C) of the glass fiber due to the property of hardening of the calcined powder after drying It is satisfactory and environmentally friendly, and addition of a small amount of preservative to the binder prevents the cellulose used as a stabilizer from being decomposed by the microorganisms, thereby improving the adhesion and durability of the heat insulating material.

Hereinafter, the constituent components and the manufacturing process of the incombustible binder for forming a glass fiber insulation according to the present invention will be described in detail. However, the present invention is not limited to the above- It is to be understood that the same is by way of illustration and example, and is not to be construed as limiting the technical spirit and scope of the invention.

The incombustible binder for forming a glass fiber insulation according to the present invention comprises 30 to 70% by weight of calcined powder, 3 to 10% by weight of stabilizer solution, 1 to 3% by weight of foam, 0.5 to 2% by weight of preservative, 25 to 65.5% %, And the preparation method thereof includes a step of preparing an aqueous stabilizer solution in which 2 to 4% by weight of water-soluble powder of an alkali metal carboxymethyl cellulose (CMC) system is uniformly mixed with 96 to 98% by weight of water; 30 to 70% by weight of calcined powder, 3 to 10% by weight of the stabilizer aqueous solution, 1 to 3% by weight of the foam and 0.5 to 2% by weight of the preservative are added to 25 to 65.5% by weight of water and stirred.

The composition ratio of each constituent defined in the incombustible binder is based on repeated experiments for impregnating or coating a glass long fiber needle mat to form a heat insulating material and it is necessary to keep a given composition ratio to obtain a binder having a desired property do.

The present invention relates to a method for producing a binder for a glass fiber-reinforced thermosetting insulation material comprising a calcined gypsum powder as a main component, wherein the calcined gypsum is a white powder obtained by heating the gypsum to a temperature of 150 ° C or more. It can be manufactured as a nonflammable binder for forming a glass fiber insulation material by curing by the crystal growth of the calcined gypsum using the property to be set back.

In the present invention, calcined gypsum is not limited to any particular type such as alum or semi-gypsum. The calcite is called calcium sulfate hemihydrate (CaSO ₄ 0.5H ₂ O), stucco or fly gypsum, which can react with water and form reaction products and typically residues, including calcium sulfate dihydrate. The reaction between plaster and water is generally expressed by the following formula.

CaSO ₄ 0.5H ₂ O + 0.5H ₂ O → CaSO ₄ 2H ₂ O + column

In the above reaction, the calcite undergoes reheating in the state of its dihydrate (CaSO ₄ 2H ₂ O) in a short period of time and generates heat. Through this reaction, calcite crystallizes and hardens.

In order to utilize the crystallization reaction of the calcined graphite, a non-combustible binder using a non-combustible inorganic particle, such as a calcined kaolin, is applied on a glass fiber mat and cured to form a calcined kaolin particle on the mat surface, The crystallization reaction of the calcined gypsum enhances the adhesion between the glassy filament mats. The cemented cement thus hardened plays a role of improving the strength of the formed heat insulating material and maintaining the shape thereof, and the crystallized gypsum is not burnt, so that it shows incombustibility.

In addition, the stabilizer used in the present invention is an aqueous solution in which a water-soluble cellulose-based powder is dissolved in water. In the preparation of the aqueous stabilizer solution, water-soluble powder of an alkali metal carboxymethyl cellulose (CMC) 2 to 4% by weight of the mixture is homogeneously mixed. The viscosity of the incombustible binder to be obtained due to the inclusion of the stabilizer aqueous solution and the dispersion stability of the inorganic particles are maintained.

The water-soluble powder of the alkali metal carboxymethyl cellulose system may be used alone or as a mixture of any one substance selected from sodium carboxymethylcellulose (CMC Na) or carboxymethylcellulose potassium (CMC K).

Next, in the binder manufacturing step of the present invention, 30 to 70% by weight of the calcined powder, 3 to 10% by weight of the stabilizer aqueous solution, 1 to 3% by weight of the foam and 0.5 to 2% by weight of the preservative are added to 25 to 65.5% When the viscosity of the binder is lower than 65.5% by weight of water, the amount of the binder applied to the glass fiber mat is small, so that the adhesive strength and strength are weakened. In addition, There is a time-consuming problem for excess moisture to dry. On the other hand, when water is added in an amount of less than 25% by weight and viscosity is high, it is difficult to apply the binder uniformly to the surface of the glass fiber mat and the adhesion to the surface pores is not impaired.

As described above, since it is important that the binder of the present invention is uniformly applied to the surface of the glass fiber mat, it is possible to maintain a viscosity suitable for applying an appropriate amount of the binder to the surface thereof with appropriate water and stabilizer aqueous solution.

In addition, the foaming agent used in the present invention is preferably contained in an amount of 1 to 3% by weight based on the total weight of the binder, which is added in an amount suitable for forming a stable foam in a solution of the incombustible binder, Dispersibility of the inorganic particles when applied to the long-fiber mat is facilitated, and uniform application of the binder is enabled. In other words, the foaming agent acts to retard the hardening of the binder by interfering with the contact between the calcined particles in the dispersed state of the binder, so that the calcined powder can be maintained in a dispersed state for a long time, thereby sufficiently increasing the pot life of the incombustible binder Has an effect.

The foaming agent may be used alone or in combination of soap, egg white, saponin and gelatin, and it is most economical to use soap.

In the incombustible binder produced as described above, the calcined gypsum is dispersed in a stable state by the stabilizer and the foaming agent in the binder state, but is uniformly applied to the surface of the glass fiber mat, and then molded into a pipe, curved surface, The binder is adhered to the binder by the viscoplasticity of the coconut binder during the pressing process, and the shape is maintained after the pressing. In addition, during the molding process, the bubbles of the binder of the soda-lime base are extinguished by the pressurization, so that the contact of the alumite particles is smoothly carried out and the crystallization reaction proceeds easily.

On the other hand, the incombustible binder of the present invention uses a cellulose-based powder as a stabilizer, soap, egg white, saponin, and gelatin as a foaming agent. These substances are fed as microorganisms as natural products, and the dispersion of the incombustible binder is lowered and the bubbles disappear And the viscosity is lowered at the same time, so that it sometimes becomes difficult to use. In the present invention, since a small amount of preservative is added to prevent the natural product from being fed to microorganisms, the use of the incombustible binder can be stably performed.

For the above reasons, the preservative added to the binder of the present invention can maintain the aqueous solution state for the purpose of preserving the incombustible binder and inhibit the physiological activity of the microorganism and inhibit the growth, and if the environment is not harmful, But is not limited to, preferably about 0.5 to 2% by weight based on the total weight of the binder may be used alone or in combination with creosote, tar, copper sulfate, zinc chloride, chlorophenol, boric acid, benzoic acid and sodium benzoate, The antiseptic is suitably mixed to two or more kinds or alternately used for each glass fiber mat to exhibit the effect corresponding to various microorganisms.

For reference, the characteristics of the preservative are briefly described. Creosote is a commercial coal tar distillate, which is a complex mixture of organic compounds mainly composed of hydrocarbons and is widely used as a wood preservative. Tar is a black oily liquid that is formed when organic materials such as wood, coal, and petroleum are distilled or distilled. Its function is similar to that of creosote.

Copper sulfate is used to remove blue-colored fish when they are dissolved in water. It is a colorless crystal that is used to remove preservatives or fire resistance. Have been used.

Chlorophenol is not very soluble in water but it is toxic to many organisms and it is useful for eliminating bacteria, fungi, insects and weeds. Boric acid is made by the action of boric acid and sulfuric acid. And is used as a preservative or disinfectant.

Benzoic acid is a widely used preservative ingredient in the world, and it has the ability to inhibit microorganisms harmful to foods such as bacteria, yeast and fungi, allowing the processed foods to be stored for a long time. The benzoic acid is often used as sodium benzoate which is insoluble in water and melts in water.

As described above, the incombustible binder for molding a glass fiber insulation material according to the present invention has been completed through a number of experiments. However, the present invention is not limited to the above embodiments, but can be easily understood and practiced by those skilled in the art. do.

[Example 1]

(Preparation of binder)

4 parts by weight of sodium carboxymethylcellulose sodium (CMC Na) powder was uniformly mixed with 96 parts by weight of water to prepare an aqueous stabilizer solution. To 30 parts by weight of water were added 60 parts by weight of the calcined powder, 5 parts by weight of the stabilizer aqueous solution, ) And 2 parts by weight of an antiseptic (creosote) were added and stirred uniformly to prepare an incombustible binder.

(Molding of glass fiber insulation)

A 10 mm thick glass fiber mat with a thickness of 10 mm was impregnated on the incombustible binder, followed by compression with a roller, and then laminated to form a three-layer cylindrical jig to produce a glass fiber insulation material having a thickness of 30 mm. And dried in a microwave drying apparatus at a temperature of about 180 to 200 DEG C for 2 hours.

[Example 2]

(Preparation of binder)

3 parts by weight of carboxymethylcellulose sodium (CMC Na) powder was uniformly mixed with 97 parts by weight of water to prepare an aqueous stabilizer solution. To 40 parts by weight of water were added 50 parts by weight of calcined powder, 7 parts by weight of the stabilizer aqueous solution, Gelatin) and 1 part by weight of an antiseptic agent (zinc chloride) were added and stirred uniformly to prepare an incombustible binder.

(Molding of glass fiber insulation)

The glass fiber insulation according to Example 2 was produced by the same method as in Example 1, except that the composition of the incombustible binder was different from that in Example 1.

[Example 3]

(Preparation of binder)

A stabilizer aqueous solution was prepared by mixing 98 parts by weight of water with 2 parts by weight of carboxymethylcellulose potassium (CMC K) powder uniformly. To 50 parts by weight of water, 40 parts by weight of sasogi powder, 5 parts by weight of the stabilizer aqueous solution, Soap) and 1 part by weight of an antiseptic agent (sodium benzoate) were added and stirred uniformly to prepare an incombustible binder.

(Molding of glass fiber insulation)

The glass fiber insulation according to Example 3 was produced by the same method as in Examples 1 and 2, except that the composition of the incombustible binder was different from that of the above Examples 1 and 2.

[Comparative Example 1]

(Preparation of binder)

The binder according to Comparative Example 1 was a binder used in the past, and a magnesium hydroxide flame retardant (a bentonite solution and a flame retardant in a volume ratio of 96: 4%) was added to a bentonite solution (water and bentonite in a volume ratio of 96: 4% After mixing to obtain a crosslinking reaction product, the mixture was added in turn to a volume ratio of 2.6% of an adhesive (Poly Vinyl Acetates), 8% of Sodium Carboxymethyl Cellulose and 0.4% of a Silane Coupling Agent to 89% To prepare a binder.

(Molding of glass fiber insulation)

The glass fiber-reinforced thermosensitive insulation material according to Comparative Example 1 was produced by the same method as in Example 1, except that the constituents of the binder were different from those of the above-mentioned Examples.

[Comparative Example 2]

(Preparation of binder)

The binder of Comparative Example 2 was prepared by mixing and stirring 2 wt% of loess powder in 98 wt% of water to obtain an ocher solution, mixing 4 wt% of carboxymethylcellulose sodium with 96 wt% of water and stirring to obtain a thickener aqueous solution, , 9% by weight of acrylic acid and 1.0% by weight of potassium persulfate were charged and polymerization reaction was carried out to obtain an acrylic adhesive solution. To the 82% by weight of the loess solution was added 7% by weight aqueous solution of thickener, 6% by weight of acrylic adhesive solution and 5% Followed by stirring to prepare a water repellent binder.

(Molding of glass fiber insulation)

The glass fiber insulation according to Comparative Example 2 was produced in the same manner as in Example 1, except that the components of the binder were different from those in the above-mentioned Examples.

[Experimental Example]

The heat insulating materials prepared in Examples 1 to 3 and Comparative Examples 1 and 2 were repeatedly measured five times in accordance with official test standards such as KS L9016, KS M3500, KS F2271 and KS F4714, Table 1 shows the results.

Item Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Thermal conductivity
(W / mk. At < RTI ID = 0.0 > 70 C) 0.032 0.031 0.032 0.052 0.038 Flexural strength
(MPa) 0.91 0.84 0.76 0.53 0.46 density
(Kg / m3. Max) 228 221 215 196 211 Maximum application temperature
(° C) 830 820 800 750 780 Surface water repellency
(%, After 1 hour) 99.8 < 99.8 < 99.9 < 75.0 < 99.9 <

As shown in Table 1, in the examples tested with the glass fiber insulation material molded using the incombustible binder of the present invention, compared with the glass fiber insulation material according to the comparative example, the thermal conductivity and the fire resistance And the density of the binder is good. In addition, the incombustible binder of the present invention is excellent in water repellency of the heat insulating material even if no water repellent is used, It is possible to prevent the corrosion due to the decomposition action and to maintain the excellent adhesive strength and strength for a long period of time, so that the durability is improved.

Therefore, the incombustible binder for forming a glass fiber insulation according to the present invention can be variously substituted, modified and changed without departing from the technical idea of the present invention, and can be used for various industrial equipment piping or industrial furnace ), As well as environment-friendly materials that can be applied as incombustible and adiabatic materials for airplanes, ships, automobiles, and architectural structures, as well as plant facilities for thermal insulation and cooling.

Claims (7)

30 to 70% by weight of calcined powder;
3 to 10% by weight aqueous stabilizer solution;
1-3 wt% of foam;
0.5 to 2% by weight of an antiseptic;
25 to 65.5% by weight of water;
Of the glass fiber-reinforced thermosetting insulation material. The method according to claim 1,
Wherein the calcined gypsum powder is at least one selected from anisotropic and semi-gypsum. The method according to claim 1,
Wherein the stabilizer aqueous solution is a mixture of 96 to 98% by weight of water and 2 to 4% by weight of water-soluble powder of alkali metal carboxymethyl cellulose (CMC). The method of claim 3,
Wherein the water-soluble powder of the alkali metal carboxymethyl cellulose system is at least one substance selected from sodium carboxymethylcellulose (CMC Na) or carboxymethylcellulose potassium (CMC K). . The method according to claim 1,
Wherein the foaming agent is used alone or in combination with soap, egg white, saponin and gelatin. The method according to claim 1,
Wherein the preservative is selected from the group consisting of creosote, tar, copper sulfate, zinc chloride, chlorophenol, boric acid, benzoic acid and sodium benzoate. Preparing a stabilizer aqueous solution to uniformly mix 2 to 4% by weight of a water-soluble powder of alkali metal carboxymethyl cellulose (CMC) based on 96 to 98% by weight of water; And
30 to 70% by weight of calcined powder, 3 to 10% by weight of the stabilizer aqueous solution, 1 to 3% by weight of the foam and 0.5 to 2% by weight of the preservative are added to 25 to 65.5% by weight of water and stirred.
The method for producing a non-combustible binder for forming a glass fiber-reinforced thermosensitive insulation according to any one of claims 1 to 6,