KR20180137317A - Manufacturing method of Nonflammable EPS pannel with wasted EPS granules - Google Patents

Abstract

The present invention relates to a method for manufacturing an insulating panel, the method comprising: (a) an inorganic mixing process for preparing an inorganic powder mixture liquid in which a separate mixture liquid is mixed with 50-70 parts by weight of an inorganic powder prepared by mixing carbon powder and silica in equal amounts, heating and melting the mixture at 1,300-2,000°C, and cooling and pulverizing the mixture; (b) a pulverized beads process for pulverizing graphite-containing waste Styrofoam to prepare pulverized beads of 1-10 mm; (c) a pulverized beads mixing process for mixing 120-150 parts by weight of the pulverized beads with the inorganic powder liquid mixture; and (d) an insulating panel process for pouring the mixed pulverized beads into a mold, expanding the same for 30-60 minutes through heat spontaneously generated from the inorganic powder liquid mixture, and manufacturing an insulating panel with expanded Styrofoam thereby. In particular, the separate liquid mixture is prepared by the following steps: a base liquid step (a1) for mixing 100 parts by weight of water with 11-19 parts by weight of nitric acid and gradually dropping 3-7 parts by weight of magnesium in small amounts as the mixture starts to boil and becomes clear, to complete a base liquid; a mixed liquid step (a2) for slowly stirring in a stirrer, 100 parts by weight of water, 14-21 parts by weight of sodium oxide, 45-56 parts by weight of silicon dioxide, 0.03-0.07 parts by weight of iron oxide, and 0.3-0.9 parts by weight of a dispersing agent; a stirring step (a3) for gradually dropping in the mixed liquid prepared in the mixed liquid step (a2), 1.6-5.2 parts by weight of magnesium carbonate and 4-9 parts by weight of the base liquid prepared in the base liquid step (a1), and stirring the same until steam is generated; and an addition step (a4) for adding 3-9 parts by weight of a water repellent to the stirred mixture and stirring the same until the mixture reaches 80-90°C through spontaneous heat.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a method for manufacturing an insulating panel using an inorganic flame retardant for pulverizing waste styrofoam and waste urethane,

The present invention relates to a method for manufacturing an adiabatic panel with an inorganic flame retardant for pulverizing waste styrofoam and waste urethane.

Styrofoam (styrofoam) or Styropor (German: Styropor) is a brand name of plastic called expanded polystyrene. Polystyrene is expanded by the action of foaming agent. It is called foaming polystyrene, styrofoam, foamed styrene, styropole, etc. It is abbreviated as EPS after initials in English. It is white and light, and it is widely used because it is excellent in water resistance, heat insulation, soundproofing, and buffering properties. Foam polystyrene, styrofoam, foamed styrene, and styropol. Styropol is a trademark of BASF AG, a German synthetic chemical company. Styrofoam is a trademark of Dow Chemical Company of America and is widely known as Styropor in Korea.

Polystyrene is a widely used plastic, a polymer of styrene. It is a colorless and transparent thermoplastic material. It softens above 100 ℃, becomes a viscous liquid when it reaches about 185 ℃, and has strong properties such as acid, alkali, oil, alcohol and so on. Expanded polystyrene is a foamed product that is injected with hydrocarbon gas such as pentane or butane into the polystyrene resin. It is a resource-saving material that 98% of the volume is air and the remaining 2% is resin.

In the manufacturing process, styrene is injected with a foaming agent such as pentane / butane gas, polymerized with water, and then heated until a predetermined molecular weight is reached. Then, beads which are spherical particles of expanded polystyrene thus obtained are washed and dried, treated with wastewater, and screened to obtain a finished product. Because it is white and light, it is excellent in water resistance, heat insulation, soundproofing, and buffering properties. Therefore, it is mainly used for cups, bowls, plates, shell containers, meat packing containers, egg packing containers, packaging materials for electronic products and other fragile items, It is widely used as patterned building materials, decorative furniture, and agricultural and marine products boxes. In addition, it is used as wall material of food warehouse, warehouse of freezing pipe, wall and ceiling material of prefabricated house, stage apparatus of TV and artificial snow.

Foamed polystyrene foam, which is expanded polystyrene (EPS), is prepared by preheating a bead-shaped polystyrene raw material containing a blowing agent, aging the beads which have been firstly foamed for a suitable period of time, putting them into a plate or barrel mold, A method of melt-extruding and foaming the polystyrene resin and the foaming agent in an extruder by melt-mixing them, and the like.

Foamed polystyrene foam is composed of 300.66 million completely independent fine bubbles per 1L. Since 97% of the volume is air, it has an effective blocking function against the intrusion of heat and cold air. There is no case of being absorbed by the capillary phenomenon as shown in FIG. 1, and the barrier against the permeation of water vapor is also excellent. Sandwich panels are made by inserting heat insulation material between the steel plates as a core material, and the insulation material used for the core material is expanded polystyrene foam, polyurethane, glass wool, and the like.

The panel using the foamed polystyrene foam as a core material is excellent in the insulation property of the foamed polystyrene foam, especially the insulation against high frequency, the insulation effect is relatively large, the water absorption and the specific gravity are small, and the workability and corrosion resistance are excellent And is widely used as a preferable heat insulating material. In the sandwich panel market in Korea, EPS polystyrene foam (EPS) panels using expanded polystyrene foam as core materials accounted for 89.7%, while polyurethane panels using polyurethane as core material accounted for 8.0%, using glass wool and minerals as core materials Since glasswool panels are made up of 2.3%, most of them are made of expanded polystyrene foam (EPS) panels with good insulation, economy, construction and hygiene.

However, foamed polystyrene foam (EPS) panels using foamed polystyrene foam as a core are light and inexpensive, and because there are production plants everywhere in the country, the supply is smooth. In the event of fire, fire spreads between the steel plates, It is vulnerable to heat without any measures until the building is burned down.

Polyurethane panels using polyurethane as core material are more expensive than EPS panels, but they are cheaper than glasswool panels and have flame retardant performance, but they are heavy in weight. In addition, the polyurethane used as the core material has a high heat insulating property, it can be foamed at the construction site, and is safe against chemicals, but has a disadvantage in that the volume decreases with time and the thermal conductivity gradually increases.

In addition, glass wool panels using glass wool as core materials have flame retardancy, but are expensive and fewer than EPS panel production factories. Furthermore, glass wool is extremely heavy, and the International Center for Cancer Research classifies glass fibers as carcinogens and melts glass into fiber form, which has the disadvantage that workers are exposed to fine dust for a long time at the construction phase .

In recent years, the government has decided to use fire retardant sandwich panels (EPS) panels and polyurethane panels, which are vulnerable to fire, due to the fact that they can cause a big human casualty due to rapid burning and suffocation due to toxic gas, Is strictly regulated.

However, if the use of wax polystyrene foam (EPS) panels is increased and the use of waxing panels is increased, compared to EPS panels, it will take a considerable amount of facility investment and facility period. Can not be said. Therefore, the production of styrofoam reinforced with flame retardancy is urgently required for a foamed polystyrene foam (EPS) panel using foamed polystyrene foam as a core, and the effect is halved when the production cost exceeds the manufacturing cost of the polyurethane panel, There is a desperate method.

Examples of such sandwich panels are foamed polystyrol (10) called styrol in the center, as shown in Figs. 1, 2 and 3 based on domestic patents 10-2009-0019497 and domestic utility model registration 20-0341900. A coupling protrusion 21 protruding at one end of one end of each of the opposite ends and a coupling groove 22 formed at the other end of the coupling protrusion 21 so that the coupling protrusion 21 of the coupling protrusion 21 of the other sandwich panel 10a So as to be fitted into the coupling groove 22 as shown in FIG.

As shown in FIG. 4, the dual-foamed polystyrene foam 10 has a structure in which a large number of foamed beads 2, in which a large number of EPS beads are foamed, are fused together, A technique of coating a flame-retardant coating film 3 on the surface of the expanded particles 2 foamed to form a foamed state has been developed in Korean Patent Laid-Open No. 10-2006- 0092616. However, since the raw beads are coated so as to form a flame- The flame retardancy is not uniform.

An example of an eco-friendly building material is disclosed in Korean Patent Registration No. 10-1349312. However, since such conventional eco-friendly building materials are made of natural pulp of waste materials, they can be vulnerable to fire, and there are limitations on the state change of the material, so that the application field of construction materials can be limited to interior finishing materials have.

Also, flame retardant styrofoam or urethane foam is prepared by adding 10 to 20% by weight of graphite to provide flame retardancy. However, at the time of dismantling, waste styrofoam and waste urethane foam do not burn well, and they do not melt very well, which makes it difficult to dispose of wastes.

It is an object of the present invention to provide a method which can be used by regenerating graphite-containing flame retardant styrofoam or urethane foam.

  Another object of the present invention is to provide a base liquid which spontaneously generates heat by adding nitric acid and magnesium to water in a simple manner not by simply mixing a separate mixed liquid to be added to pulverized beads obtained by pulverizing graphite-containing fesistoform into beads , A base liquid, a heat insulating material and a water-repellent agent are added to a mixed liquid prepared by adding sodium oxide, silicon dioxide, iron oxide and a dispersant to water, and the mixture is heated and stirred in a stirring step, mixed with the pulverized beads, Insulating and insulating materials that make used sandwich panels to make fire-proof and insulation possible Flame retardant insulation sandwich panels using inorganic addition method to grind beads of graphite-containing pesticofile containing graphite Styrofoam, inorganic flame retardant for pulverizing waste urethane And to provide a method for manufacturing an adiabatic insulation panel.

Another object of the present invention is to provide a base liquid which spontaneously generates heat by adding nitric acid and magnesium to water in a simple manner not by simply mixing a separate mixed liquid to be mixed with pulverized beads of graphite- And the dispersing agent are added to the mixed solution, the insulating material and the base liquid are gradually dropped to stir the water vapor so as to maximize the bubble generation, thereby improving the dispersibility. By mixing the heated mixed liquid and the inorganic powder in the pulverized beads, A foamed polystyrene foam is foamed and molded into a uniform shape, and the sandwich panel using the foamed polystyrene foam is excellent in adiabatic incompatibility, and a sandwich panel using the foamed polystyrofoam is provided with a method for manufacturing an insulating panel with an inorganic flame retardant added for crushing waste styrofoam and waste urethane will be.

To this end, the present invention relates to a method of mixing and mixing carbon powder and silica in an equal amount, heating and melting the mixture at 1300-2000 占 폚, cooling and pulverizing 50-70 parts by weight of inorganic powder, 700-900 parts by weight of a spontaneous mixture An inorganic mixing step (a) for producing a heated inorganic powder mixture;

(B) a pulverized bead process for pulverizing 1 to 10 mm particles of flame retarded waste styrofoam added with 10 to 20% by weight of graphite to obtain pulverized beads;

(C) a pulverizing bead mixing step of mixing 120-150 parts by weight of the pulverized beads with the heated inorganic powder mixture in a rotary mixer;

(D) pouring the mixture into a molding mold, and then performing a heat insulation panel process (d) for making a heat insulation panel by foamed foam foamed by spontaneous heating of the mixture of inorganic powders for 30 to 60 minutes;

The heated mixed liquid of the inorganic mixing step (a) is mixed with 100 parts by weight of water

(A1) a base liquid phase (a1) in which 3-7 parts by weight of magnesium is mixed with 11-19 parts by weight of nitric acid to boil up while steam is generated and then the base liquid is made transparent;

Next, a mixed solution step (a2) in which 14-21 parts by weight of sodium oxide, 45-56 parts by weight of silicon dioxide, 0.03-0.07 part by weight of iron oxide and 0.3-0.9 parts by weight of dispersant are gradually stirred in a stirrer for 20 minutes to 100 parts by weight of water;

Stirring step (a3) in which 1.6-5.2 parts by weight of magnesium carbonate and 4-9 parts by weight of the base solution of the base solution step (a1) are slowly added to the mixed solution of the mixture solution step (a2) and stirring is carried out until steam is evacuated;

(A4) in which 3-9 parts by weight of potassium methylsiliconate is added to the mixture stirred in the stirring step (a3) and stirred for 1 hour 30 minutes to 2 hours so as to form 80-90 占 폚 by self-heating; ≪ / RTI >

After mixing 100 parts by weight of water with 11 to 19 parts by weight of nitric acid, 3-7 parts by weight of magnesium is gradually dropped to generate steam and boil. In the base liquid phase (a1) where the base liquid is made transparent, The water is replenished as much as the amount of water generated, and the water is allowed to react for about 1 hour to be transparent.

In the addition step (a4) in which 3-9 parts by weight of potassium methylsiliconate is added to the mixture stirred in the stirring step (a3) and the mixture is heated and stirred for 1 hour 30 minutes to 2 hours until it becomes transparent, Lt; 0 > C for 1 hour and 30 minutes to 2 hours. When the mixture becomes transparent, stirring is stopped.

After mixing 100 parts by weight of water with 11 to 19 parts by weight of nitric acid, 3-7 parts by weight of magnesium is gradually dropped to generate steam and boil. In the base liquid phase (a1) where the base liquid is made transparent, The water is replenished as much as the amount of water generated, and the water is allowed to react for about 1 hour to be transparent.

3-9 parts by weight of potassium methylsiliconate was added to the mixture stirred in the stirring step (a3), and the mixture was stirred for 1 hour 30 minutes to 2 hours. In the addition step (a4), the mixture was stirred for 1 hour 30 minutes to 2 hours Followed by heating and stirring.

If the amount of the silver nitrate is more than 19 parts by weight in the base liquid phase (a1) of the present invention, the dispersibility and shape retentiveness of the mixed liquid deteriorate, and the flammable heat insulating property of the expanded polystyrene foam is not maintained. If it is less than 11 parts by weight, And the flammable heat insulating property is not maintained due to the lowering of the concentration.

The sodium oxide which constitutes the mixed liquid in step (a2) of the present invention exothermically reacts with water to function as a dehydrating agent. This is because magnesium contained in the base liquid in the base liquid phase (a1) And generates hydrogen to generate bubbles. If the amount of magnesium oxide exceeds 21 parts by weight, the mixture is denatured by overheating. If the amount of magnesium oxide is less than 14 parts by weight, exothermic action does not occur.

Carbon dioxide to be added to the mixed solution (b) in the mixed solution step (a2) of the present invention is a stable inorganic material and has fire-proofing properties. If it exceeds 56 parts by weight, shape retention is difficult and uneconomical. If it is less than 45 parts by weight, .

The iron oxide added in the mixed solution step (a2) of the present invention functions as a morphological stabilizer. If it exceeds 0.07 part by weight, the performance is unequal without any difference in performance, and if it is less than 0.03 part by weight, the morphological stability is poor.

The polyoxyethylene alkyl ether to be added in step (a2) of the present invention functions as a surfactant and serves as a dispersant, and the mixed solution is uniformly applied to the surface of the styrofoam beads. When the amount exceeds 0.9 parts by weight, When the amount is less than 0.3 parts by weight, the dispersibility is lowered and the fire-proofing ability is deteriorated.

The magnesium carbonate added in the stirring step (a3) of the present invention exists in nature as a magnesite and melts well in strong acid and functions as a heat insulating material. When the addition amount exceeds 5.2 parts by weight, there is no difference in the heat insulating property and it is uneconomical. If it is less than 1.6 parts by weight, the heat insulating property is deteriorated.

The potassium methyl silicate added in the adding step (a4) of the present invention functions as a water repellent agent and prevents moisture penetration to improve durability corresponding to temperature and humidity change. If the amount exceeds 9 parts by weight, the mixed solution is uniformly mixed with the expanded styrofoam beads . If the amount is less than 3 parts by weight, the water repellency is deteriorated and the fire retardant heat insulating performance is deteriorated.

In the pulverizing bead mixing step (c) of the present invention, 120 to 150 parts by weight of pulverized beads are mixed by rotary mixing with the heated inorganic mixed solution, wherein 700 to 900 parts by weight of the heated mixed liquid and 50 to 70 parts by weight of the inorganic powder The separate mixed liquid heated by mixing is expanded together with the inorganic powder so that the inorganic powder is uniformly mixed on the surface. This uniformly surrounds the surface of the pulverized beads and acts to disperse the inorganic powder evenly, The inorganic powder and the mixed liquid permeate between the foam cracks and the pores at the time, thereby improving the heat insulating property and improving the adhesiveness.

In addition, at the time of foaming of the sandwich panel, since the foaming action is performed by the heating temperature (80 to 90 ° C) of the self-heating inorganic mixed liquid, there is no need to separately supply water vapor or foaming gas, and the foam cracking of the styrofoam beads is reduced, The inorganic mixed solution heated between the pores and the pores is well permeated to improve the flame retardancy after the foaming and increase the bonding property, thereby contributing to the shape maintenance without breakage.

As described above, the present invention is characterized in that a separate mixed solution to be added to the pulverized beads is not a simple mixing method, but a basic solution step (a1) in which nitric acid and magnesium are mixed with water to generate self-heating, sodium oxide, silicon dioxide, And a water-repellent agent is added to the stirring step (a3) in which the base liquid and the heat insulating material are mixed is added to the mixing step (a2) Is mixed well with the pulverized beads, it is mixed uniformly on the surface of the pulverized beads. Therefore, when the foam is foamed by self-heating in the mold, the coating effect is excellent, and the mixed powder of inorganic powder using the heated mixed liquid is used as a foam crack And penetration into pores is easy, and a heat insulating panel using foamed polystyrene foam in this manner is excellent in fire resistance and heat resistance.

1 is a horizontal sectional view of a sandwich panel which is a general heat insulating panel,
Fig. 2 is an enlarged horizontal sectional view of the main part showing the assembled state of Fig. 1,
3 is a horizontal sectional view showing an example of another structure of a conventional sandwich panel which is a heat insulating panel,
4 is an enlarged cross-sectional view of a conventional styrofoam,
5 is an enlarged sectional view of a heat insulating panel showing the flame retardant styrofoam concept of the present invention,

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

The present invention is characterized in that a casing 20 is attached to both sides of a foamed polystyrene foam 10 as shown in Fig. 3 and a coupling protrusion 21 and an engaging groove 22 are formed at both ends of the foamed polystyrene foam 10 to insulate the fireproof insulation sandwich panel, Complete with panel.

The foamed polystyrene foam 10 in the present invention is obtained by mixing carbon powder and silica at the same weight ratio (1: 1), melting them at 1300 to 2000 ° C (preferably 1600 ° C) in a heating furnace, 50 to 70 parts by weight (preferably 60 parts by weight) of an inorganic powder which is pulverized so as to have a particle size of 0.001 to 3 mm in a pulverizer (simply pulverize using a known pulverizer such as disk mill, jet mill or ball mill) ) Is mixed with 700 to 900 parts by weight (preferably 800 parts by weight) of a separate mixed liquid heated and heated by itself to prepare an inorganic powder mixture.

(Preferably 130 parts by weight) of 1 to 10 mm of pulverized beads are mixed in 750 to 970 parts by weight of the inorganic powder mixture (the weight of the pulverized beads is small but the addition amount of the inorganic powder mixture is relatively high , And the mixture is poured into a molding mold, and a heat insulating panel is manufactured by using fire retardant heat insulating foamed polystyrofoam foamed for 30 to 60 minutes by self heat generation of an inorganic powder mixture alone. It is possible to manufacture various conditions, but it is carried out based on preferred examples.

Separate mixture preparation

(A1)

To 100 liters of water, add 11 to 19 liters (preferably 15 liters) of nitric acid, mix well and mix, and add 3 to 7 grams of magnesium (preferably 5 grams) of magnesium in a small amount to generate boiling water If magnesium is added gradually, it becomes gradually transparent. It replenishes water as much as vaporized vapor (keeps 100 liters of water), and if left to react for about 1 hour, .

(A2)

Water is added to 100 liters of water, sodium oxide 4 to 21 grams (preferably 15 grams) which is a heating agent, 45 to 56 grams of silicon dioxide, 0.03 to 0.07 grams of iron oxide, and 0.3 to 0.9 grams of polyoxyalkyl ether, 0.5 g) is added to the mixture, and the mixture is gradually stirred with a stirrer for 20 minutes to prepare a mixed solution.

Stirring step (a3)

To the mixed solution, 1.6 to 5.2 g (preferably 3 g) of magnesium carbonate is added as an adiabatic agent, and 4-9 liters (preferably 5 liters) of the base solution is slowly added dropwise until the water vapor is released from the mixed material A mixed solution (c) is prepared.

Addition step (a4)

When water vapor is generated in the above-mentioned cross-linking agent, 3-9 grams (preferably 6 grams) of potassium methylsiliconate is added as a water repellent agent and stirred for about 1 hour 30 minutes to 2 hours. When the water becomes self-heating at 80 to 90 ° C, Stop.

Inorganic mixing process (a)

A mixture of carbon and silica (SiO2) powders in an amount equal to 800 to 1000 liters of a separate mixed solution heated by the self-heating, mixed with 50 to 70 g of powdered inorganic powders by heating and melting at 1300 to 2000 ° C, The mixing process is carried out.

The grinding step (b)

Waste styrofoam added with 10 to 20% by weight of graphite is pulverized into 1 to 10 mm particles, and less than 1 mm is separated and discarded.

Grinding bead mixing process (c)

130 to 150 parts by weight (preferably 130 parts by weight) of pulverized beads having a thickness of 1 to 10 mm are added to the heated mixture of inorganic powders and mixed in a rotary mixer for 10 minutes.

Foam molding and insulation panel process (d)

120 to 150 parts by weight (preferably 130 parts by weight) of the mixed pulverized beads in the pulverized bead blending step (c) are taken out and poured into a mold, and the mixture is heated for 30 to 60 minutes And the sandwich panel, which is a heat insulating panel, is completed by a core material having a thickness of 10 cm in a usual manner.

The components of Example 1 are summarized in Table 1 below.

division Ingredient content Partial content Total amount
(A1) 100 liters of water
15 liters of nitric acid
Magnesium 5 grams

5 liters

5 liters

(A2) 100 liters of water
Sodium oxide 15 grams
Silicon dioxide 50 grams
Polyoxyalkyl ether 0.5 grams



165.5 grams



170.5 grams Stirring step (a3) Magnesium carbonate 3 grams 3 grams 173.5 grams
Addition step (a4) Potassium methylsiliconate 5 grams
5 grams
178.5 grams

Flame emission test using gas nozzles was carried out using the adiabatic panel of Example 1 and Comparative Example 1, the temperature was measured, and the time and temperature for maintaining the shape and the temperature of the back surface of the panel without flame radiation were measured to confirm the heat resistance This is shown in Table 2.

division Example 1 Comparative Example 1 Heat resistance temperature 1300 ℃ 300 ° C Backside temperature 60 ° C 80 ℃ duration 1 hours 5 minutes

10, a foamed polystyrene foam 10a, a sandwich panel 20, an exterior material 21, an engaging projection 22,

Claims (3)

Carbon powder and silica are mixed in an equal amount and heated and melted at 1300-2000 占 폚 and then cooled and pulverized to 50-70 parts by weight of inorganic powder and 700-900 parts by weight of a separate mixed liquid heated and heated spontaneously are mixed to prepare an inorganic powder An inorganic mixing step (a) for producing a mixed solution;
(B) a pulverized bead process for pulverizing 1 to 10 mm particles of flame retarded waste styrofoam added with 10 to 20% by weight of graphite to obtain pulverized beads;
(C) a crushing bead mixing step of mixing 120-150 parts by weight of the pulverized beads with the heated inorganic powder mixture in a rotary mixer; And
(C) of grinding beads; (d) pouring the mixture into a mold; and (d) carrying out a sandwich panel process (d) of making a sandwich panel with expanded foamed foam foamed for 30 to 60 minutes by self heating of the mixture of inorganic powders;
The heated mixed liquid of the inorganic mixing step (a) is mixed with 100 parts by weight of water
(A1) a base liquid phase (a1) in which 3-7 parts by weight of magnesium is mixed with 11-19 parts by weight of nitric acid to boil up while steam is generated and then the base liquid is made transparent;
Next, a mixed solution step (a2) in which 14-21 parts by weight of sodium oxide, 45-56 parts by weight of silicon dioxide, 0.03-0.07 part by weight of iron oxide and 0.3-0.9 parts by weight of dispersant are gradually stirred in a stirrer for 20 minutes to 100 parts by weight of water;
Stirring step (a3) in which 1.6-5.2 parts by weight of magnesium carbonate and 4-9 parts by weight of the base solution of the base solution step (a1) are slowly added to the mixed solution of the mixture solution step (a2) and stirring is carried out until steam is evacuated;
(A4) adding 3-9 parts by weight of potassium methylsiliconate to the mixture which is stirred in the stirring step (a3) and agitating the mixture at 80 to 90 占 폚 for 1 hour and 30 minutes to 2 hours by self heating; Wherein the waste styrofoam is produced by carrying out the following steps.
The method according to claim 1, wherein the base liquid phase (a1) is prepared by mixing 11-19 parts by weight of nitric acid with 100 parts by weight of water and gradually adding 3-7 parts by weight of magnesium to generate steam and boiling, , The water is boiled and steamed separately, and water is separately replenished and allowed to react for about 1 hour to make it transparent. The waste styrofoam, the inorganic flame retardant added thermal insulation panel for pulverizing waste urethane Gt;
2. The process according to claim 1, wherein in the addition step (a4) in which 3-9 parts by weight of potassium methylsiliconate is added to the mixture stirred in the stirring step (a3) and stirred for 1 hour 30 minutes to 2 hours until the mixture is transparent, And stirring is stopped at 80 to 90 ° C. for 1 hour and 30 minutes to 2 hours. When the transparent styrene is transparent, stirring is stopped. A method for manufacturing an adiabatic panel with inorganic flame retardant added for pulverizing waste urethane.

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