KR20090111707A - Porous lightweight foam and its manufacturing method - Google Patents

Abstract

PURPOSE: A porous light weight foaming body is provided to ensure the effect of reducing cost for high energy and process. CONSTITUTION: A method for producing porous light weight foaming body comprises: a step of drying wetting gel obtained through delay of gelation; a step processing ingredient to desirable form; and a step of adding molding manufactured ingredient to produce porous foaming body.

Description

Porous lightweight foam and its manufacturing method

1 is a bulk wet gel.

2 is a powder type raw material prepared according to the present invention.

FIG. 3 is a raw material of a particulate form manufactured by drying the wet gel of FIG. 1 in an appropriate water content according to the present invention. FIG.

Figure 4 is a foamed particle raw material foamed the particulate raw material of Figure 3 prepared according to the present invention.

Figure 5 shows the various sizes of foam particles produced according to the present invention.

Figure 6 is a loess-containing foam particles prepared according to the present invention.

7 is a plate-shaped porous light weight foam prepared from the powdery raw material of FIG. 2 according to the present invention.

8 is a plate-shaped porous light weight foam prepared from the particulate raw material of FIG. 3 according to the present invention.

9 is a plate-shaped porous lightweight foam prepared from the expanded particle raw material of FIG. 4 according to the present invention.

10 is enlarged to show the fusion state of the foam particles of the porous lightweight foam of Figure 9 prepared according to the present invention.

11 is a bulk porous lightweight foam prepared by foaming and manufacturing a foamed ceramic particle mixed with a wet gel according to the present invention.

12 is an enlarged view of FIG. 11 according to the present invention.

Figure 13 is a porous lightweight foam prepared by bonding paper to one surface according to the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a porous lightweight foam for construction and industry using water glass as a silica compound (SiO 2) as a raw material and a method of manufacturing the same.

Known techniques of porous inorganic foams in connection with the present invention include

Techniques are known for producing wet silica gel by exposing the prepared silica gel to wet air and heat foaming.

Specific examples are

Republic of Korea Patent Publication No. 2001-0106171

A lightweight foam prepared by exposing silica gel to wet air to absorb an appropriate amount of water to produce wet silica gel and using the wet silica gel as a raw material.

The wet silica gel prepared through the humidification process was put in a heat-resistant mold of a predetermined shape, heated at a temperature of 980 to 1300 ° C. for at least 1 hour, and the glass was softened to expand the gas of the porous internal tissue to dispose of the pores. It is known to make from foamed glass pellets of tissue or to form foam.

However, the above process is prolonged by a long time humidification process for absorbing a certain amount of moisture in silica gel manufactured by using alkali metal Na as a partial component.

Since the high temperature firing at 980-1300 ° C. should be applied for more than 1 hour to the foam fusion process of the wet silica gel, the process is prolonged and high energy costs are lost.

In addition, the wet silica gel prepared by the fusion between the particles is actually made by heat treatment at a temperature higher than the foaming temperature of the silica gel seems to facilitate the process, but in fact, the surface of the particles in the heat treatment process for fusion is preferentially foamed to form pores This acts as a heat insulation layer on the surface of the particles, which blocks heat transfer to the inside of the particles, thus preventing foaming inside the silica gel, which leads to considerable difficulties in internal porosity. As the furnace melts at a high temperature and loses the porous structure, manufacturing as a heat insulating material is not easy.

In addition, Patent Documents 10-2005-0063487 and 10-0733543 disclose that porous silica obtained by heat-treating silica gel at a high temperature of about 1200 ° C. for at least 1 hour is mixed with a binder in which aluminum phosphate or water glass, which is an inorganic binder, and glass powder are mixed. To prepare a mixture, and to put the above into a mold and to a molded body of the desired shape, and to manufacture a lightweight insulating material prepared by heat-treating the prepared molded body at a high temperature of about 1000 degrees Celsius for at least 1 hour. The technology is open to the public.

However, this is also a manufacturing technology of lightweight insulation material manufactured from porous silica manufactured by using alkali metal Na as a partial component.

The foamed silica gel was prepared by heating the prepared silica gel at a temperature of 900 to 1100 degrees for at least 1 hour to prepare a foam, and mixing the prepared foam with an inorganic binder and drying the moisture contained therein at 50 degrees to 200 degrees. As a technology for manufacturing lightweight insulation by heating and drying for more than 1 hour with heat of

As described above, the silica gel is formed into a molded body and dried in each of the above steps, in which a heat treatment process is applied for a total of 2 hours or more at a high temperature of 1000 ° C. or more and 1 hour or more at a temperature of 200 ° C. or more. As a light insulation material is manufactured through the process, high energy costs and prolongation of the process increase the manufacturing cost so much that there is a big limitation in commercializing the product and thus loses the marketability.

Accordingly, the present invention is to provide a lightweight foam that is eliminated the problem that the porous material is produced in a heterogeneous state in spite of the excessive energy cost and prolonged process and the provision of the two elements resulting from the prior art described above. It was devised to provide a manufacturing method that is capable of minimizing energy costs, shortening of the process and homogeneous foaming in a short time.

Therefore, the present invention is to provide a homogeneous porous lightweight foam in a minimum energy cost, shortening the process and a short time,

By mixing the polymerization additive in the water glass to induce the polymerization reaction, to obtain a wet gel, which is a precipitate produced from the condensation of the water glass by the polymerization reaction and to prepare the above as a raw material of the desired shape, by heating it to a foamable temperature Provides a porous lightweight foam using water glass configured to improve physical properties by selectively adding a physical or chemical process to the manufacturing process of the basic composition to expand and porous to the process as needed,

In particular, as a manufacturing process for facilitating the foaming, a porous lightweight foam prepared by replacing the heating foaming process using microwaves with the foaming process of the general heating method as necessary is provided.

The present invention is to use the characteristics of the thermal expansion of water glass and to produce a porous lightweight foam for industrial and building it,

By mixing the polymerization additive in the water glass to induce the polymerization reaction, to obtain a wet gel, which is a precipitate produced from the condensation of the water glass by the polymerization reaction and to prepare the above as a raw material of the desired shape, by heating it to a foamable temperature Provides a porous lightweight foam using water glass configured to improve physical properties by selectively adding a physical or chemical process to the manufacturing process of the basic composition to expand and porous to the process as needed,

In particular, as a manufacturing process for facilitating the foaming, a porous lightweight foam prepared by replacing the heating foaming process using microwaves with the foaming process of the general heating method as necessary is provided.

Hereinafter, to help the understanding of the present invention, a brief look at the composition of the water glass and its polymerization reaction.

<Composition of water glass>

The composition of waterglass is a strong alkaline water soluble silicate, usually expressed as M₂O · m SiO₂ · n H₂O, where M is the alkali metal, mn is the molar ratio, and representative alkali metals are Li, Na, K, In addition to Ru and Cs, it contains ammonium base (N * R '), and Na, K, Li, and N * R' are commercially available. Commercially, however, it is often made of Na-based sodium silicate, which is highly soluble in water, and mixed with silicon dioxide, sodium carbonate, which is an alkali salt, in a proportion, and then melted at 1,300 ℃ ~ 1,500 ℃, and then steamed with low pressure steam cooker. It is made by processing.

<Polymerization of Water Glass>

When mixed with an acid or a water-soluble salt, neutralization occurs in the course of the polymerization reaction, and in the process, a gel is formed by forming a sol (jol) and dehydration and generating a precipitate of SiO 2. Then, as the gelation proceeds, the curing proceeds to produce hard hardened SiO 2 in the complete gelation state.

(※ Silica gel is produced by molding cured SiO2 into spherical shape and drying it.)

The polymerization reaction of water glass is as follows. (One of the various types of water glass is sodium silicate of Na group, a representative type of water glass.)

Na₂O · XSiO₂ + H₂SO₄ → XSiO + Na₂SO₄ + H₂O

The water glass and its polymerization reaction have been briefly described above.

Hereinafter, the manufacturing process of the present invention will be described in detail.

<Manufacturing process>

The manufacturing process of the present invention,

A) drying the wet gel obtained through the delay of gelation during the polymerization of the water glass to have a desired water content;

B) processing the raw material of the form to be prepared;

C) preparing a porous foam by putting the prepared raw material into a molding die and heating and foaming it at a temperature of about 200 to 500 degrees Celsius;

It is configured as the basic process.

The above will be described in more detail. (Hereinafter, the present invention will be described in parallel with the description of each process and the description of the drawings which are examples of manufacture.)

Fair )

During the polymerization of water glass Gelling  Through delay Obtained Wet gel  Drying to have a desired moisture content;

When water glass is polymerized with an acid or a water-soluble salt, each molecule is dispersed evenly in a solvent.

Dehydration and aggregation from the colloidal sol to produce a wet gel (gel) is changed to a polymer of the network structure of the molecule of the binding force is increased, and through continuous dehydration through coagulation to solidification (※ solidification: State just before solidification which loses liquidity completely / solidification: state which completely lost liquidity and became hard)

The gel in the solidification state refers to a semi-solid wet gel, which contains a large amount of water in the network structure of the gelled silica, and thus is easily foamed to be used as a preferred raw material for preparing a porous lightweight foam according to the present invention. Can be.

On the other hand, precipitates in the form of hardened state due to the complete gelation of water glass have a very small amount of moisture contained in the network of about 2 to 10% and a very minute change in intermolecular bonds, which is a foam according to the present invention. It is not easy and cannot be a preferable manufacturing method from an industrial point of view.

On the other hand, it is not possible to limit the moisture content of the wet gel to be prepared to have a moisture content, but the water content within the range to have a moisture content and flowability that is easy to the maximum mechanical molding, and a minimum moisture content is easy to foam It is preferred to be prepared, which shortens the process required for drying through an additional process and thus is a more preferred method of production, and therefore the elements of the method of making the wet gel can be changed accordingly, which is also claimed by the present invention. It is included in a range.

Hereinafter, a known method for obtaining a wet gel as described above will be described.

1) A method of controlling the mixing ratio of water glass and additives.

2) How to control the concentration of water glass and additives.

3) How to change the type of additives.

4) How to control the reaction temperature.

5) How to adjust ph.

6) Addition of additional components for delayed gelling, including antigelling agents, solidifying agents, solvents, and the like.

7) Other methods of using various supercritical methods, including supercritical devices.

Various methods can be carried out, including the like, through which the wet gel can be obtained and the porous lightweight foam of the present invention can be prepared.

The above is described in more detail below.

(The following is based on the results expressed under normal reaction conditions.)

1) How to control the input amount of water glass and additives.

The rate of gelation changes depending on the amount of additives mixed.

When the amount of additive used throughout the polymerization reaction to gel water glass is less than the gelation equivalent of water glass, the rate of gelation is delayed to obtain a general result that a wet gel can be obtained. Can be.

Theoretically used additive to completely gel 100 g of water glass (35% solids solution)

Suppose that the amount of phosphoric acid (95%) is 16.3gr and the industrial error range is ± 0.5%.

The amount of sulfuric acid mixed for the complete gelation of water glass was

The margin of error can be seen as less than 15.485, which corresponds to the negative category.

That is, <delay of complete gelation reaction of water glass = water glass (40% solids solution) 100gr + sulfuric acid

Less than 15.485 gr) is established and falls within the negative category of input for such gelation.

When sulfuric acid is mixed with water glass, an equivalent amount of additive for the complete gelation of water glass is mixed.

Unlike the case, the polymerization proceeds at a very slow rate to obtain a desired wet gel.

2) How to control the concentration of water glass and additives.

The lower the water glass concentration and the higher the concentration of the additive, the faster the gelation rate.

In the case of sulfuric acid, the error does not exceed 1%. Therefore, when the concentration of water glass is increased, when the error range of the mixing ratio does not exceed about 0.5%, the gelation can be prevented at a moment to induce slow gelation.

Therefore, the input amount within the above-described range should be carefully controlled, but the control of the error within the practically ± 0.5% is not made very easily industrially. The error range of the input amount should be 1% or more to facilitate the operation.

(The same interpretation applies to other acids except sulfuric acid.)

3) How to change the type of additives.

The rate of gelation changes according to the type of additives

As an additive, Ca, Mg, Al, Zn, etc. are generally used as an acid or a water-soluble salt including zinc oxide, boric acid, hydrochloric acid, sulfuric acid, phosphoric acid, kaolin,

Among the sulfuric acid, gelation occurs immediately upon mixing, whereas zinc oxide, zinc carbonate, and phosphate require several tens of hours to cause the gelation reaction at room temperature.

In the case of boric acid, complete gelation occurs after several hours.

4) How to control the reaction temperature.

Under normal reaction conditions, the gelation proceeds easily at temperatures above 25 degrees Celsius, but at temperatures below that temperature, the gelation time lengthens as the temperature decreases. do.

5) How to adjust ph.

When the sol is prepared by mixing water glass and an acid as an additive, even if the mixing ratio of the two substances is slightly changed, the sol has a significant influence on the pH change of the sol, and the PH change causes a great change in the time to gel.

That is, when the solid content of the water glass is 35% or less, gelation occurs in the vicinity of PH7, which is about the same amount as sulfuric acid, but when it is 35% or more, gelation or precipitation occurs before PH7.

6) Method of adding additional components for gelling delays, including antigelling agents, solidifying agents, solvents and the like.

Thus, wetting while using an equivalent amount of additive to gel the entire amount of water glass

It is preferable to obtain a precipitate from a method in which a gel in a state can be obtained.

This is the concentration of water glass, reaction temperature, type and amount of additives, PH, gel

Changes in various physical and chemical environments, including anti-oxidants, anti-solidification agents, solvents, and supercritical methods

This can be achieved by selectively applying the language.

Solvent: Alcohol

7) Other methods of using various supercritical methods, including supercritical devices.

Various methods, including the like, can be carried out, and the porous lightweight foam of the present invention can be easily produced by maintaining the semi-solid state of the wet gel obtained thereby at least until the time of performing the foaming process of the present invention.

1  Manufactured through this step Wet gel  Show an example.

1 is a bulk wet gel.

Semi-solid bulk gel obtained by delaying gelation according to the present invention, which is prepared by drying a gel containing a large amount of water obtained through a polymerization reaction with an easy proper moisture content in carrying out the process according to the present invention. It is manufactured to have a water content of 20 to 50%, and has easy physical molding.

Process b) processing the raw material of the form to be prepared;

The process of obtaining a homogeneous gel prior to molding the obtained wet gel into a raw material of a desired shape is an important factor in improving the quality by enabling the formation of homogeneous foam pores in the porous lightweight foam according to the present invention. .

In order to prevent the agglomerates due to the additives from the wet gel, a homogeneous gel may be produced by applying high-speed agitation during mixing of the water glass and the additives.

In the above example, when the powdery additive is mixed with water glass, the powdery additive is dissolved into water or water glass to prepare a solution, and then mixed with water glass so that the water glass and the additive can be more uniformly mixed. It may be a more preferable method.

For example,

Water glass and liquid acid are added to the stirrer at the same time.

It is known that a method of mixing by mixing a small amount of water glass with a powdery acid or a high concentration of acid uniformly to prepare a dilute solution, and adding the same to a water glass rotating at a high speed in a stirrer is easy to prepare a homogeneous gel.

The prepared homogeneous gel is dried to have a proper moisture content, and the above is made of a raw material of a desired shape.

On the other hand, in the water content of the wet gel and the water content of the raw material

In the case of the wet gel to be manufactured as a molded particle, it is preferable that the wet gel is manufactured to a moisture content of about 20 to 50%, which is easy to form mechanically.

The water content of the prepared raw material is about 15 to 40% of easy foaming It can be a preferable manufacture example to manufacture by the water content in the range which has water content. In addition, such a suitable water content can shorten the additional drying process, which can be a more economical manufacturing method.

Figure 2 , 3,4 5,6 are raw materials of various types according to the present invention prepared through this step Manufacturing example  Shows.

2 is a powder type raw material prepared according to the present invention.

This is a powdered wet gel prepared by pulverizing the bulk raw material of FIG.

FIG. 3 is a granular raw material manufactured by molding the wet gel of FIG. 1 to a proper water content according to the present invention. FIG.

Figure 4 is a foamed particle raw material foamed the particulate raw material of Figure 3 prepared according to the present invention.

The specific gravity and pore state after foaming change according to the moisture content of the particle material before foaming.

When the particle material is manufactured at a moisture content of about 15% to 20%, which is an optimum moisture content, the foamed pores are very uniform and the appearance of the foam is beautifully produced.

In addition, if the moisture content is higher than necessary, the pores of the foam particles are partially over-expanded and the foam is distorted. On the other hand, if the moisture content is lower than necessary, the foam rate is low and the foam density increases and the foaming time is required. It also becomes longer.

Figure 5 shows the various sizes of foam particles produced according to the present invention.

It is shown that particle foam can be produced in a variety of shapes and sizes to be prepared.

Figure 6 is a loess-containing foam particles prepared according to the present invention.

As an example showing that it can be prepared by containing at least one ceramic raw material that emits far infrared rays, it is prepared by heating and foaming the granular raw material prepared by uniformly mixing the ocher powder in the fluidized gel.

fair C) Put the raw material prepared in the molding apparatus 200 ~ 500 degrees  Inside and outside By heating foaming  Porous With foam  Manufacturing;

In this process, it is possible to manufacture by a general heating method and foam using a high frequency generator.

In particular, the foaming method using a high frequency is a very easy manufacturing method

The surface of the particle is first heated by the heat applied from the outside during the foaming of the general heating method, and the heated surface is preferentially foamed, and the foam layer of the surface formed thereon prevents heat from being transferred to the inside of the particle. It serves to prevent heat transfer to the inside of the particles to prevent foaming, resulting in a very difficult manufacturing as a heat insulating material.

Thus, through the present invention it is possible to manufacture a homogeneous foam as a whole by allowing the particles to be foamed by heating by the vibration of moisture inside the particles using a microwave at high frequency.

On the other hand, the raw material may be prepared in 15% to 40%, which is an easy foaming moisture content according to the present invention, most preferably it is produced at a water content of 20% to 30%.

The following table describes the relationship between the water content and the quality of the foam particles.

(Heating foaming equipment: microwave generator of capacity 1KW / heating temperature approximately 200-250 degrees Celsius / sample: spherical particle raw material of the diameter 5mm / maximum heating time 20 minutes)

Particle moisture content 10% 15% 20% 30% 40% Firing time 20 minutes 5 minutes 3 minutes 2 minutes 5 minutes Foam strength - Strong Strong Strong Very weak importance - 0.3 0.08 0.05 0.02 Foaming quality Not firing Bad Good Good Bad

As can be seen from the above table,

In the case where the moisture content was as low as 10%, the heating time was extended to 20 minutes, but foaming did not occur, and thus it could not be produced as a foam.

In addition, in the case of 15% moisture content, the foaming time was slightly extended due to the low moisture content, and the specific gravity was higher than that of other manufactures, but the homogeneous foaming was made as a whole, and the specific gravity met the conditions as a raw material for lightweight materials. It can be a preferred preparation.

In addition, in the case of the water content of 20% and 30%, the time required for foaming was shortened compared to the other cases, the foaming pores were homogeneous, the strength was also good, and the specific gravity was also satisfactory.

In the case of 40% moisture content, the heating time was extended, and the vitreous process was partially vitrified in the heating process, so that the foaming was not partially performed. It was found that its strength was very weak, making it unsuitable for use as a raw material.

Figure 7 , 8, 9, 10, 11, 12, 13 is a porous according to the present invention prepared through this step Lightweight Foam It is a production example .

7 is a plate-shaped porous lightweight foam prepared from the powdery raw material of FIG. 2 according to the present invention.

A powdery raw material having a water content of 25% is used, and an example of manufacturing a porous lightweight foam foamed at a temperature of about 250 ° C. using a microwave apparatus for 3 minutes.

Since it was foamed using microwaves, the water molecules could be vibrated evenly to form rapid foaming and homogeneous pores, and made of a porous lightweight foam having a relatively low specific gravity.

FIG. 8 is a plate-shaped porous lightweight foam prepared from the particulate raw material of FIG. 3 according to the present invention. A particulate raw material having a moisture content of 30% is introduced into a plate-like mold, and the microstructure is about 250 degrees Celsius. It is an example of preparation of the porous lightweight foam according to the present invention obtained by heating and foaming for 5 minutes with a wave.

In this case, since the particles are melt-foamed and melted together by only heating foaming, no additional binder is required. However, when spraying water on the surface of the particles and heat-foaming them, the particles are more easily dissolved due to the slight dissolution of the gel component on the surface of the particles. Adhesion can be achieved.

On the other hand, in order to prevent cracking of the porous lightweight foam produced and to increase the bending strength can be prepared by mixing one or more organic raw materials in a wet gel, the organic raw materials used at this time is the foaming temperature of the particle raw material It is a preferred production method to be used as having a foaming temperature according to the above.

FIG. 9 is a plate-shaped porous lightweight foam prepared from the expanded particle material of FIG. 4 according to the present invention, which is coated with water glass on the surface of the expanded particles, and put into the mold and using microwaves 200-250 degrees It is an embodiment of the present invention prepared by heating for 3 minutes at the temperature of the seed so that the water glass as a binder binds and simultaneously foams the particles.

On the other hand, to prevent cracking of the porous lightweight foam produced, and to increase the flexural strength, the organic raw material is mixed with the foam particles or sprayed on the surface of the foam particles and put into a molding frame to dry or lower specific gravity porous lightweight It can be prepared by foam firing at the foaming temperature of the organic binder for the production of foam.

10 is enlarged to show the fusion state of the foam particles of the porous lightweight foam of Figure 9 prepared according to the present invention,

It shows the fusion state between the particles in the case of applying heat glass on the surface of the particles to heat foaming.

11 is a bulk porous lightweight foam prepared by foaming and manufacturing a foamed ceramic particle mixed with a wet gel according to the present invention.

As an additional component for increasing the strength of the porous lightweight foam according to the present invention, it can be prepared by mixing at least one ceramic foam particles or foam fine powder.

Thus, FIG. 11 shows an example in which the pearlite foam particles were mixed, and the strength was increased by five times or more compared with the case of using a single raw material for gelling.

Formulation of Figure 11: Wet gel 1 kgr + pearlescent foam particles 100 gr

12 is an enlarged view of FIG. 11 according to the present invention.

Figure 13 is a porous lightweight foam prepared by bonding paper to one surface according to the present invention.

It can be prepared by laying a surface agent to be bonded to the bottom surface of the molding die and heating foaming by putting a foaming material on the top. In particular, the paper is laid to increase the strength of the foam and the foaming material is put on top of the foam by heating and foamed to adhere the paper on the surface of the foam to produce a foam of increased strength.

In the flexural strength of the porous lightweight foam having a paper coating on one surface of the foam particles, it was found to be approximately three times higher than the porous lightweight foam having no coating.

The present invention can be prepared by mixing one or more ceramic raw materials including ocher.

The present invention can be produced by bonding a reinforcing film such as paper or film for strength reinforcement and aesthetic purpose.

The present invention can be prepared by coating a waterproof film on the surface of the porous lightweight foam to prevent absorption and absorption.

The present invention can be prepared by mixing one or more organic or inorganic fibers to enhance the strength.

The present invention can be prepared by mixing with an organic or inorganic binder, and especially when mixed with an organic binder and prepared as a flame retardant, it can increase the crack preventing effect of the foam.

The present invention can be made of a flame retardant material by mixing with an organic raw material, which is achieved by uniformly mixing the organic foamed raw material into the prepared wet gel and heating and foaming it.

The present invention can be produced by forming a hollow portion in the interior of the foam.

The present invention is prepared by using a wet gel prepared through a method of improving physical and physical properties, including colloidal silica prepared by technically removing only alkaline salts in water glass to contain more than 30% of silica in water. Can be.

More than

The porous lightweight foams of the present invention prepared using wet gels obtained by delaying the gelation of waterglass through the control of various physical or chemical factors have been described in detail.

The present invention eliminates the long-term high temperature foaming process of 1000 degrees Celsius or more, which is a part of the manufacturing process of porous lightweight foams made of waste glass or silica gel, and removes the porous lightweight foams through the shortest time low temperature foaming process of around 200 degrees Celsius. By manufacturing, it is possible to reduce the high energy cost and shorten the process.

In addition, by using the low cost water glass, which is one to tenths of the moisture, as a raw material, compared to the raw material price of the conventional foaming material, it provides an effect of significantly reducing the manufacturing cost.

In addition, if necessary, by manufacturing with high frequency microwave foaming, the surface heat insulation layer formed by the surface is first heat-foamed during foaming under the general heating method to block heat transfer to the inside, thereby preventing the internal foaming of the foam to produce a homogeneous foam. There is an effect to solve the shortcomings in the manufacturing method that was not easy to do,

In particular, by using a microwave foaming foaming time is short-time foaming can be shortened from several hours to several minutes to provide an effect that the manufacturing process is significantly shortened.

As a result, it is possible to provide a low-cost porous lightweight foam by reducing energy costs, shortening the foaming process, and reducing the cost of raw materials, thereby greatly increasing the marketability of the product. .

In addition, since it is a 100% inorganic non-combustible material and eco-friendly material, it has the effect of reducing the risk of loss of life and property and environmental pollution due to fire.

In addition, the excellent properties of porous, inorganic non-flammable and eco-friendly properties of the porous lightweight foam according to the present invention is heat insulation, sound insulation, heat resistance, non-flammable, gas-free, corrosion resistance, chemical resistance, durability, light weight, environmentally friendly, electromagnetic wave absorption, Various industries including soundproof walls, building interior and exterior materials, fire doors, firewalls, flammable materials, thermal insulation materials, filling materials, fish boxes, ice boxes, etc. It is effective in providing stability by processing and using it in various forms from articles, in particular, when used as a building interior material, it can be released from the harmful effects of volatile organic compounds (VOC) of conventional products and emits far infrared rays. Prevention of pest propagation through mixing and using functional raw materials, by using raw materials such as ocher and char And it provides various effects including an effect, such as providing other features and also purifying the noxious gas seized.

Claims (13)

In the porous lightweight foam, Light weight porous foam, characterized in that the wet gel obtained in the course of the polymerization reaction in water glass prepared by heating the foam using a variety of heating apparatus. In the porous lightweight foam, A) drying the wet gel obtained by delaying gelation during the polymerization of water glass to have a desired water content; and B) processing the raw material of the form to be prepared; and C) by putting the prepared raw material into a molding apparatus and heating and foaming using a variety of heating apparatus to produce a porous foam; a lightweight porous foam, characterized in that produced by the manufacturing method as a basic process and its production Way. In the porous lightweight foam, A) drying the wet gel obtained by delaying gelation during the polymerization of water glass to have a desired water content; and B) processing the raw material of the form to be prepared; and 3) a porous lightweight foam and a method for manufacturing the same, wherein the raw material is put into a molding apparatus and prepared by a porous foam by heating and foaming using a microwave apparatus. . The method of claim 2 or 3, Lightweight porous foam and a method for producing a porous lightweight foam characterized in that the manufacturing process characterized in that at least one additional physical or chemical treatment process is additionally configured to further enhance the properties of the porous lightweight foam on the manufacturing process. Dry the wet gel obtained in the process of polymerization in water glass with water content of 10 to 50%, process it into a raw material of granular form, and, if necessary, to 200-500 degrees Celsius using various heating devices. Porous lightweight foam material and porous lightweight foam particles, characterized in that produced by heating foaming. To the wet gel obtained in the course of the polymerization reaction in water glass, at least one organic or inorganic raw material is mixed to enhance the physical properties or to impart a complex performance, which is dried and granulated with a water content of 10 to 50%. The porous lightweight foam material and porous lightweight foam particles, characterized in that the processing, if necessary, produced by heating and foaming at a temperature of 200 ~ 500 degrees using a variety of heating devices. The porous lightweight foam of claim 5 or 6, wherein the porous lightweight foamed raw material is put into a molding apparatus of a shape to be prepared and heat-foamed at a temperature of 200 to 500 ° C. using various heating apparatuses. The porous lightweight foamed particles according to claim 5 or 6 are mixed with an organic or inorganic binder, put into a molding apparatus of a shape to be manufactured and manufactured by drying at room temperature or by heat drying, or using various heating apparatuses as necessary. A porous lightweight foam characterized in that it is produced by heating and foaming at a temperature of ˜500 degrees Celsius. According to one of the 1,2,3,6,8 selected from the above, The heating device is a porous lightweight foaming particles or porous lightweight foaming body, characterized in that produced by the manufacturing method characterized in that the microwave device. According to one of the 1,2,3,5 selected from the above, The wet gel, which is a raw material for the production of the porous lightweight foam or the porous lightweight foam material or the porous lightweight foam particles, is prepared by including one or more organic or inorganic additives as additional components, and manufactured as a raw material. Made of porous lightweight foam or porous lightweight foam raw material or porous lightweight foam particles. According to claim 1 selected from 1 to 10, The wet gel is 1) A method of controlling the mixing ratio of water glass and additives. 2) How to control the concentration of water glass and additives. 3) How to change the type of additives. 4) How to control the reaction temperature. 5) How to adjust ph. 6) adding additional components for delayed gelling, including antigelling agents, solidifying agents, solvents and the like. 7) Other methods of using various supercritical methods, including supercritical devices. It includes the one produced in a semi-solid wet state by a method selected from among, Porous lightweight foam or porous lightweight foam raw material or porous lightweight foam particles, characterized in that manufactured using this as a raw material. According to claim 1 selected from 1 to 10, The wet gel is Technically removing only the alkaline salt in the water glass by polymerizing the colloidal silica prepared to contain a large amount of silica components in the water, including the one produced in a semi-solid wet state, characterized in that it was prepared using as a raw material Lightweight foam or porous lightweight foam raw material or porous lightweight foam particles. According to claim 1 selected from 1 to 12, The porous lightweight foamed particles, characterized in that produced by the production method of coating at least one organic or inorganic raw material on the surface of the porous lightweight foam or by bonding a surface material such as paper or film to form an additional bonding layer.

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