KR20100003478A - Foam-resin chip having flame-retardant characteristic and method for preparing the same - Google Patents

Abstract

PURPOSE: A flame retardant foam-resin chip is provided to ensure excellent flame retardancy and higher heat resistant temperature than original resistant temperature of a foam resin, and to impart light weight and thermal insulation to cement products. CONSTITUTION: A flame retardant foam-resin chip comprises (a) pulverized particles or cutting particles and (b) a flame-retardant coating agent coated on the surface of the pulverized particles or cutting particles. The flame-retardant coating agent is selected from the group consisting of: (i) a liquid-phase inorganic binder; (ii) a liquid inorganic binder and inorganic particles or flame retardant; (iii) an organic binder and inorganic particles or flame retardant; (iv) a hydrid binder of the liquid organic binder and liquid inorganic binder; and (v) a hydrid binder of the liquid organic binder and liquid inorganic binder, and inorganic particles or flame retardant.

Description

Flame-retardant foamed resin chip and method for manufacturing the same {FOAM-RESIN CHIP HAVING FLAME-RETARDANT CHARACTERISTIC AND METHOD FOR PREPARING THE SAME}

The present invention relates to a flame-retardant foamed resin chip and a method for manufacturing the same, and more particularly to a flame-retardant foamed resin chip and a method for manufacturing the same, and a thermal insulation insulating material using the same can be used for molding aids, fillers, thermal insulation insulation and the like.

Conventionally, a variety of powder-forming molding aids are used to reduce the raw materials and improve the light weight of heat-melting resins such as ABS resins. However, low-heat-resistant foam resins such as styrofoam are deformed before reaching the melting temperature of the resin. I could not.

In addition, foamed resins such as styrofoam were added in order to give light weight or thermal insulation to secondary cement products, but there was a problem in that sophisticated mixing was difficult due to differences in specific gravity, hydrophilicity and lipophilic properties.

In addition, the foamed resin crushed products or cut products can be used as heat insulating materials or heat insulating materials by themselves because of their excellent light weight and heat insulating properties, but have low heat resistance and are easily ignited and burned to generate toxic combustion gases. It is not used.

The present invention has been made in view of the problems of the prior art, forming a flame-retardant coating on the surface of the foamed resin chip or cut product, and a flame-retardant foamed resin chip that can be used as a filler or a molding aid during the heat molding of the hot melt resin, and a method of manufacturing the same. It aims to provide.

It is another object of the present invention to provide a flame retardant foamed resin chip which can be mixed well as a raw material in a cement secondary product as well as a filler or a molding aid, and which can effectively express light weight and heat insulation. It is done.

Still another object of the present invention is to provide a foamed resin chip and a method of manufacturing the same, which can be used as a thermal insulation insulating material by itself by developing flame retardancy by itself.

Still another object of the present invention is to provide a foamed resin chip having a higher heat resistance than the original thermal temperature of the foamed resin and a method of manufacturing the same.

Still another object of the present invention is to provide a novel thermal insulation insulating material which can be constructed by blowing or the like and is excellent in thermal insulation function.

The present invention to achieve the above object,

a) foamed or crushed foamed resin; And

b) flame retardant coating coated on the surface of the pulverized or cut particles of a)

It provides a flame-retardant foam resin chip comprising a.

In addition, the present invention

a) providing a foamed resin;

b) pulverizing or cutting the foamed resin of step a) to produce foamed resin crushed particles or cut particles;

c) coating a flame retardant coating on the surface of the crushed or cut particles of step b); And

d) preparing a flame retardant pulverized particle or a cut particle body which is dried and pulverized by grinding or spraying the pulverized particle or chopped particle coated on the surface of the flame retardant coating of step c);

It provides a method for producing a flame-retardant foam resin chip comprising a.

In addition, the present invention

a) foamed or crushed foamed resin; And

b) coated on the surface of the crushed or cut particles of a)

   무기) Liquid Inorganic Binder

   Ii) liquid inorganic binder, and inorganic particles or flame retardant

   I) liquid organic binders and inorganic particles or flame retardants;

   바인더) Hybrid binder of liquid inorganic binder and liquid organic binder

   Iii) hybrid binder of liquid inorganic binder and liquid organic binder, and inorganic particles or flame retardant

   Flame retardant coating selected from the group consisting of

It provides a heat insulating material comprising a flame-retardant foam resin chip containing.

Flame retardant foam resin chip of the present invention can be used as a filler or molding aid for molding thermoplastic resin with excellent flame retardancy higher than the original heat resistance temperature of the foam resin, it is mixed well in cement products and effective in providing light weight and heat insulation, By itself, it can be used as a thermal insulation insulating material for building, and in particular, it can recycle a large amount of waste foaming resins generated in a large amount, thereby showing a great effect on resource saving.

The present invention is to prepare a flame-retardant foam resin chip by improving the flame retardancy, heat resistance, etc. by coating a flame retardant coating on the crushed or cut products of foamed resin such as styrofoam, urethane foam, melamine foam, polyethylene foam, polypropylene foam, It is intended to be used as a filler, molding aid, or thermal insulation.

To this end, the foamed resin pulverized product or cut product can be easily obtained from the grinding means described in Korean Patent Publication No. 10-2002-0060053 filed by the present inventor. The particle size is set according to the use of the flame-retardant foam resin chip, and may be subjected to only primary grinding or cutting, secondary grinding or cutting, air blowing if necessary, or screening the particle size using a screen. Can be used according to.

For example, when used as a filler or molding aid in virgin resin, such as plastic injection, extruded products, the size of 0.1 to 0.5 mm is preferred, for this purpose, the first grinding, the second grinding, and blowing, screen particle size screening It is preferable. In addition, when used as a filler or molding aid, such as cement secondary products, it is preferable to use a fine powder of 3 mm or less, and it is preferable to perform primary grinding, secondary grinding, and screening screen size selection. In addition, if it is used as a thermal insulation material, such as a blown thermal insulation material, it is preferable that the fine powder filtered after the first pulverization 3 mm or more.

These pulverized particles or chopped particles can be produced in various shapes depending on the crushing cutter, it is obvious that can be selected according to the purpose. In addition, the filler or molding aid for plastic resin is preferably made of a needle or pellet, which is capable of heat-sealing with virgin paper because the base resin of the foamed resin is thermoplastic, and in the case of a filler or molding aid of a cement secondary product, It is preferable to be manufactured in a fibrous form, and in the case of an insulating heat insulating material, any shape may be possible, and in particular, when manufactured in a needle shape or a fibrous shape, both an open cell and a closed cell may be obtained, and thus may serve as a preferable insulating heat insulating material.

The flame-retardant foamed resin chip of the present invention is obtained by coating a flame-retardant coating to the foamed resin crushed particles or cut particles prepared in this way and dried them.

Flame retardant coating for obtaining the flame-retardant foam resin chip of the present invention is a group consisting of inorganic binder, inorganic binder and inorganic particles or flame retardant, organic binder and inorganic particles or flame retardant, and hybrid binder and inorganic particles or flame retardant of organic binder and inorganic binder. It is preferably selected from.

The inorganic binder may be water glass (alkali metal silicate, modified alkali metal silicate, alkali metal borosilicate, etc.), silica sol, alumina sol, silane condensate and the like. These may be used alone or may be used in combination with each other.

The organic binder may be a cellulose compound, polyvinyl alcohol, a resol type organic binder (phenol resin, melamine resin, urea resin, etc.), various organic emulsions, silicone oil, and the like, which are conventional water-soluble binders. The use of an organic binder alone is not preferable in terms of flame retardancy. The mixing ratio with the inorganic binder may vary depending on the type of the inorganic binder or the organic binder, but the weight ratio of the inorganic binder: the organic binder is preferably 100: 0.5 to 50. The organic binder is added to increase the adhesion to the pulverized particles or the cut particles and to change the physical properties of the coating film, and it is preferable to use the organic binder as little as possible because it is a flame retardant deterioration factor.

The inorganic particles may be used in most of the inorganic powder having an average particle size of less than 100 mesh, especially heat absorption at high temperatures such as various ash, fly ash, hydrous silica, dihydrate gypsum, calcium silicate hydrate, aluminum hydroxide, magnesium hydroxide A hydrate-based, expanded perlite, expanded vermiculite, or mica having properties, and fine glass beads, glass powder, etc., which can absorb heat by heat melting at high temperatures, are preferred for imparting flame retardancy and preventing dry shrinkage. Cement, anhydrous gypsum, hemihydrate gypsum and the like can be limited in their use in terms of obtaining a pulverized particle body because it is hydrocured by itself. In addition, the inorganic particles should be selected in consideration of the compatibility with the inorganic binder, or organic binder to be used, it is difficult to obtain a flame retardant coating that can be gelated and appropriate coating most of the compatibility.

Although the compounding quantity of an inorganic particle may vary with the kind of inorganic particle and the kind of binder, 5-30 weight part is preferable with respect to 100 weight part of inorganic binders. If it is less than 5 parts by weight, it is difficult to obtain the effects of flame retardancy, disintegration, etc. that can be obtained by the combination of inorganic particles, and if it exceeds 30 parts by weight, no increase in flame retardancy is shown, and suitable for mixing with pulverized or cut particles. It is difficult to obtain the viscosity, and the cause of the dispersion is not easy.

In addition to the inorganic particles, inorganic fibers having heat resistance to reduce shrinkage expansion, such as glass wool, glass fiber, rock wool, silica-alumina fiber, alumina fiber ( Alumina fibers, silica fibers, and finely divided materials thereof may also be used.

The flame retardant may be a phosphorus flame retardant such as phosphate ester or ammonium phosphate, or a nitrogen flame retardant such as dicyandiamide, which may be dispersed or dissolved in an aqueous solution. The amount used is preferably 1 to 20 parts by weight with respect to 100 parts by weight of the binder, and if it is less than 1 part by weight, it is insufficient to add flame retardancy.

The coating ratio of the flame retardant coating agent to the pulverized particles or cut particles of the present invention is preferably 1: 0.3 to 2 by weight. If it is less than 0.3, it is difficult to sufficiently coat the pulverized particles or the cut particles, it is difficult to fully express flame retardancy, and if it exceeds 2, it is difficult to dry and cure, the specific gravity is increased, and it is uneconomical.

The composition of the coating flame retardant of the present invention can be variously selected according to the use, and its characteristics can be variously designed according to the binder, the inorganic powder, and the flame retardant. Their types are as follows. However, it is not limited only to these.

The first type is

a) 100 parts by weight of crushed or cut particles; And

b) 30 to 200 parts by weight of flame retardant coating including water glass as inorganic binder and flame retardant base

It includes.

The second type is

a) 100 parts by weight of crushed or cut particles; And

b) iii) 100 parts by weight of water glass as inorganic binder and flame retardant substrate; And

   Ii) 5 to 200 parts by weight of inorganic particles

   30 to 200 parts by weight of a flame retardant coating comprising a

It includes.

The third type is

a) 100 parts by weight of crushed or cut particles; And

b) iii) 100 parts by weight of water glass as inorganic binder and flame retardant substrate; And

   Ii) 1 to 20 parts by weight of water-soluble flame retardant

   30 to 200 parts by weight of a flame retardant coating comprising a

It includes.

The fourth type

a) 100 parts by weight of crushed or cut particles; And

b) 중량) 100 parts by weight of water glass with inorganic binder and flame retardant materials

   Ii) 5 to 200 parts by weight of inorganic particles; And

   Iii) 1 to 20 parts by weight of water-soluble flame retardant

   30 to 200 parts by weight of a flame retardant coating comprising a

It includes.

The fifth type

a) 100 parts by weight of crushed or cut particles; And

b) 100 parts by weight of an organic binder; And

   Ii) 5 to 200 parts by weight of inorganic particles

   30 to 200 parts by weight of a flame retardant coating comprising a

It includes.

The sixth type

a) 100 parts by weight of crushed or cut particles; And

b) 100 parts by weight of an organic binder; And

   Ii) 1 to 20 parts by weight of water-soluble flame retardant

   30 to 200 parts by weight of a flame retardant coating comprising a

It includes.

The seventh type

a) 100 parts by weight of crushed or cut particles; And

b) 중량) 100 parts by weight of organic binder

   Ii) 5 to 200 parts by weight of inorganic particles; And

   Iii) 1 to 20 parts by weight of water-soluble flame retardant

   30 to 200 parts by weight of a flame retardant coating comprising a

It includes.

The eighth type

a) 100 parts by weight of crushed or cut particles; And

b) iii) 100 parts by weight of an inorganic-inorganic binder and an organic-inorganic binder having a weight ratio of 100: 0.5 to 50; And

   Ii) 5 to 200 parts by weight of inorganic particles

   30 to 200 parts by weight of a flame retardant coating comprising a

It includes.

The ninth type

a) 100 parts by weight of crushed or cut particles; And

b) iii) 100 parts by weight of an inorganic-inorganic binder and an organic-inorganic binder having a weight ratio of 100: 0.5 to 50; And

   Ii) 1 to 20 parts by weight of water-soluble flame retardant

   30 to 200 parts by weight of a flame retardant coating comprising a

It includes.

10th type

a) 100 parts by weight of crushed or cut particles; And

b) iii) 100 parts by weight of an inorganic-inorganic binder and an organic-inorganic binder having a weight ratio of 100: 0.5 to 50;

   Ii) 5 to 200 parts by weight of inorganic particles; And

   Iii) 1 to 20 parts by weight of water-soluble flame retardant

   30 to 200 parts by weight of a flame retardant coating comprising a

It includes.

Coating the flame retardant coating on the surface of the pulverized particles or cut particles of the present invention can be carried out in a variety of ways. For example, mixing in a general mixer, pressure mixing in a kneader, spray coating for spraying a flame retardant coating on the surface of pulverized particles or cut particles, and the like.

The coated or cut particles thus coated are dried as it is to evaporate water to form a surface layer film. If you do not go through a separate disintegration process, it may appear in the form of a solid fiber lump or agglomerate of particles. Although it may be used as it is for the end purpose, it is preferable to introduce and disintegrate and to disintegrate. Preferred flame retardant foamed resin chips of the present invention comprises the steps of: a) providing a foamed resin; b) pulverizing or cutting the foamed resin of step a) to produce foamed resin crushed particles or cut particles; c) coating a flame retardant coating on the surface of the crushed or cut particles of step b); And d) blowing or spraying the pulverized particles or chopped particles coated on the surface of the flame retardant coating of step c) to prepare dried and pulverized flame retarded pulverized particles or chopped particles.

Blowing or spraying in step d) is to use the light weight of the foamed resin to blow the coated flame-retardant foamed resin chip in the wind (which may include hot air) to be dried and disintegrated by the wind, more Preferably, the chips blown in the wind to the net (net) to collect the chips. In particular, when spraying the wet chips (chips that are not dry) in a spray dryer, high drying productivity and disintegration productivity can be obtained only by heating at a low temperature.

In addition, in a general mixer equipped with a stirrer, the foamed resin pulverized or cut particles may be mixed with the flame retardant coating, and after mixing, the mixture may be stirred and blown while blowing air from below to simultaneously disintegrate and dry.

The flame-retardant foamed resin chips prepared in this way can be easily mixed with cement and the like because they can contain a hydrophilic group on the surface, and can be manufactured with high productivity by mixing with other materials such as cement while maintaining the inherent lightness of the foamed resin. It can be used as a filler that fills the volume and insulation, and it can be used as a filler to fill the volume space.It is a molding aid that enables precise molding by reducing the rebound phenomenon during molding by reducing the elasticity of the foam resin chip with the coating of flame retardant coating. Since the chip itself has an air cell of off-cell and closed cell, it has high insulation and flame retardancy, so it can also be used as a building insulation insulation (such as blowing wool).

The present invention will be described in more detail with reference to the following examples and comparative examples. However, the Example is only for illustrating this invention and limiting to these.

EXAMPLE

Preparation Example 1

(Production of flame retardant coating)

(Preparation of liquid-modified alkali metal silicate: liquid sodium silicate / borax / amorphous silica)

80 kg of commercially available sodium silicate water glass No. 2 was added to the reactor, and 5 kg of borax was added while melting by heating and stirring at 500 rpm with a paddle type stirrer. After the addition, the mixture was further stirred for 10 minutes to completely dissolve to prepare a modified sodium silicate solution. The water resistance (90 ° C.-10 min hydrothermal test) of this solution had a loss ratio of 5% by weight, and the adhesiveness (versus iron plate cellophane tape test) had a loss ratio of 3/25.

Preparation Example 2

(Production of flame retardant coating)

Into the liquid modified alkali metal silicate solution prepared in Preparation Example 1, 150 g of titanium butyric acid gypsum (dihydrate gypsum) with an average particle size of 150 mesh was added and uniformly dispersed in a homomixer for 30 minutes to prepare a flame retardant coating agent. It was.

Production Example  3

(Production of flame retardant coating)

10 g of ammonium phosphate was added to 1000 g of the liquid modified alkali metal silicate solution prepared in Preparation Example 1, and homogenized in a homomixer for 30 minutes to prepare a flame retardant coating agent.

Production Example  4

(Production of flame retardant coating)

50 g of acryl-butadiene emulsion (H5250, manufactured by KCC) was mixed with 1000 g of the liquid-modified alkali metal silicate solution prepared in Preparation Example 1, and 150 g of titanium-butane gypsum (dihydrate gypsum) with an average particle size of 150 mesh was added. It was added and uniformly dispersed in a homomixer for 30 minutes to prepare a flame retardant coating.

Production Example  5

(Production of flame retardant coating)

50 g of acryl-butadiene emulsion (H5250 manufactured by KCC) was mixed with 1000 g of the liquid-modified alkali metal silicate solution prepared in Preparation Example 1, 10 g of ammonium phosphate was added as a flame retardant, and the mixture was mixed for 30 minutes. The flame retardant coating was prepared by uniformly dispersing.

Production Example  6

(Preparation of crushed particles)

As shown in FIG. 1, the first grinding means 10 for grinding the expanded polystyrene, the second grinding means 30 for grinding the polystyrene chips ground from the first grinding means 10, and the first grinding means Collecting means (50) having an air blower (53) for injecting high pressure air to collect the pulverized chips from the crushing means (30) and to quickly transfer the collected chips, and a conduit (not shown) for conveying the chips. Styrofoam crushed particles having a size of 1 to 3 mm were obtained in a chip manufacturing apparatus including a storage means 70 formed with a fine screen net and having a plurality of surface covers connected to the collecting means 50. The apparent specific gravity of the pulverized particles was 0.005, and the shape of the particles showed needles.

Production Example  7

(Preparation of cut particles)

In the chip manufacturing apparatus of Preparation Example 6, cut particles of a urethane foam having a size of 3 to 20 mm were prepared using only the first grinding means. The apparent specific gravity of this cleaved particle was 0.008, and the particle shape showed mass.

Example  1 to 5

Each of the flame retardant coatings prepared in Preparation Examples 1 to 5 were mixed and coated with the styrofoam crushed particles prepared in Preparation Example 6 and then kneader, and then sprayed with a hot air at 55 ° C. with a spray dryer to collect them on a conveyor net. Disintegrated flame-retardant styrofoam chips were obtained.

Example  6 to 10

Each of the flame retardant coatings prepared in Preparation Examples 1 to 5 was spray-coated to the styrofoam cut particles prepared in Preparation Example 7, and continuously blown together with hot air at 60 ° C. to be crushed by collecting them on a conveyor net of 10 M distance. A flame retardant styrofoam chip was obtained.

Test Example  1 to 5, Comparative example  One

(Production of molded insulation using waste styrofoam described in Korean Patent Publication No. 10-2002-0060053)

Using the flame-retardant styrofoam chip prepared in Examples 1 to 5 and the general styrofoam chip prepared in Preparation Example 6, compression kneading in the kneader with the composition shown in Table 1 below, by vibrating pressure molding in a press molding machine 600 mm x 600 mm x A 25-t molded body was prepared, and the heat resistance (shrinkage ratio after 3 hours at the furnace temperature of 200 ° C.), the thickness rebound ratio during molding, and the strength were compared and tested, and the results are shown in Table 1 below.

TABLE 1

division Test Example 1 Test Example 2 Test Example 3 Test Example 4 Test Example 5 Comparative Example 1 Composition (parts by weight) Flame Retardant Chip of Example 1 6 - - - - - Flame Retardant Chip of Example 2 - 6 - - - - Flame Retardant Chip of Example 3 - - 6 - - - Flame Retardant Chip of Example 4 - - - 6 - - Flame Retardant Chip of Example 5 - - - - 6 Chip of Preparation Example 6 - - - - - 6 Anhydrous gypsum 25 25 25 25 25 25 water 60 60 60 60 60 60 Methylcellulose 1.7 1.7 1.7 1.7 1.7 1.7 Aluminum sulfate 2.4 2.4 2.4 2.4 2.4 2.4 Boric acid 2.6 2.6 2.6 2.6 2.6 2.6 Melamine 2 2 2 2 2 2 Titanium oxide 0.3 0.3 0.3 0.3 0.3 0.3 Properties Heat resistance (200 ℃ -3hr) 1.1% 0.7% 1.0% 0.6% 1.1% 2.0% Rebound Rate 1.5% 1.6% 1.6% 1.5% 1.6% 10.3% Specific gravity (kg / ㎥) 178 180 176 182 181 176 Flexural Strength (kgf / ㎠) 4.5 6.2 4.4 7.1 5.9 2.6

Test Example  6 to 10, Comparative example  2

(Manufacture of mortar for fireproof sound absorption coating)

The flame-resistant styrofoam chip prepared in Examples 6 to 10 and the general styrofoam chip prepared in Preparation Example 7 were mixed in a mixer according to the composition shown in Table 2 below, and then injected into a mold mold 600 mm x 600 mm x 25 t A mortar molded body for fire-absorbing and sound-absorbing coating of size was prepared and subjected to daily steam curing (60 ° C. × 24hr), and then compared with the plastic shrinkage rate, heat resistance (stiffness after 3 hours at furnace temperature 600 ° C.), and strength. 2 is shown.

FIG. 2 is a photograph of the mortar prepared by mixing with water of Test Example 6 and Comparative Example 2, and then placed in a beaker and left for 10 minutes. The beaker on the left side is the mortar of Comparative Example 2, and the beaker on the right side is Malta. Comparing the pictures, the mortar of Comparative Example 2 is not uniformly mixed chips, it can be observed that some of the chips are floating on the top due to the specific gravity difference. On the other hand, in the mortar of Test Example 6, flame retardant chips were uniformly mixed, and no floating of chips on the top was observed.

TABLE 2

division Test Example 6 Test Example 7 Test Example 8 Test Example 9 Test Example 10 Comparative Example 2 Composition (part by weight) Flame Retardant Chip of Example 6 6 - - - - - Flame Retardant Chip of Example 7 - 6 - - - - Flame Retardant Chip of Example 8 - - 6 - - - Flame Retardant Chip of Example 9 - - - 6 - - Flame Retardant Chip of Example 10 - - - - 6 Chip of Preparation Example 7 - - - - - 6 cement 45 45 45 45 45 45 Half gypsum 45 45 45 45 45 45 Pulp Fiber 3 3 3 3 3 3 Starch One One One One One One water 150 150 150 150 150 150 Properties Heat resistance (600 ℃ -3hr) 0.6% 0.7% 0.8% 0.6% 0.8% 15.5% Plastic shrinkage 1.5% 1.6% 1.6% 1.5% 1.6% 10.3% Specific gravity (kg / ㎥) 710 715 690 712 680 705 Flexural Strength (kgf / ㎠) 8.8 8.5 8.2 8.8 7.2 6.5

Each mortar was sprayed to a steel beam with a thickness of 40 mm within 20 minutes after the composition formulation, and as a result, the adhesion was excellent even after 24 hours, and the rebound loss rate was 20 wt%.

Example  11

(Construction of Drawing Thermal Insulation Materials)

The flame retardant chip of Example 2 was blown through a blower of 0.4 kw between the ceiling plate and the eave as shown in FIG. Figure 3 is a photograph showing the construction of the flame retardant chip of the present invention blowing through the bellows hose. The heat insulating material had a heat resistance of R of 60.

1 is a schematic perspective view showing an apparatus for grinding a styrofoam of Preparation Example 6. FIG.

2 is a photograph comparing the mortar of Comparative Example 2 and Test Example 6.

Figure 3 is a photograph of the blowing thermal insulation material of Example 11.

Reference numeral 10 is a first grinding means, 11, 12, 13, 14 is a roll mill, 15 is an inlet, 16 is an outlet, 17 is a presser plate, 19 is a pneumatic cylinder, 30 is a second grinding means 31 and 41 are the first continuous belts, 33 and 43 are the first rollers, 35 and 45 are the first contact plates, 38 are the air washers, 39 are the upper conveyors, 49 are the lower conveyors, and 50 Is a collecting means, 53 is an air blower, 70 is a storage means, 71 is an outlet and 73 is a screw feeder.

Claims (12)

a) foamed or crushed foamed resin; And b) coated on the surface of the crushed or cut particles of a)    Iii) a liquid inorganic binder;    Ii) liquid inorganic binders, and inorganic particles or flame retardants;    Iii) liquid organic binders and inorganic particles or flame retardants;    Iii) a hybrid binder of a liquid inorganic binder and a liquid organic binder; And    Iii) hybrid binder of liquid inorganic binder and liquid organic binder, and inorganic particles or flame retardant    Flame retardant coating selected from the group consisting of Flame retardant foam resin chip comprising a. The method of claim 1, The flame-retardant foamed resin chip of the foam a) is selected from the group consisting of polystyrene foam, polyolefin foam, melamine foam, and urethane foam. The method of claim 1, The flame-retardant foam resin chip of the flame retardant coating of b) is 30 to 200 parts by weight based on 100 parts by weight of the expanded resin crushed particles or cut particles of a). The method of claim 1, The inorganic particles are flame retardant foam resin chips having an average particle size of 100 mesh or less. The method of claim 1, A flame retardant foamed resin chip wherein the flame retardant is a phosphorus flame retardant or a nitrogen flame retardant. The method of claim 1, The inorganic binder is flame retardant foamed resin chip selected from the group consisting of alkali metal silicate, modified alkali metal silicate, alkali metal borosilicate, silica sol, alumina sol, and silane condensate. The method of claim 1, The organic binder is a flame-retardant foam resin chip selected from the group consisting of cellulose compounds, polyvinyl alcohol, resol type resin, emulsion type resin. a) providing a foamed resin; b) pulverizing or cutting the foamed resin of step a) to produce foamed resin crushed particles or cut particles; c) coating a flame retardant coating on the surface of the crushed or cut particles of step b); And d) preparing the dried and pulverized flame retardant crushed particles or chopped particles by blowing or spraying the pulverized particles or chopped particles coated on the surface of the flame retardant coating of step c). Method for producing a flame-retardant foam resin chip comprising a. The method of claim 8, Method for producing a flame-retardant foam resin chip is selected from the group consisting of polystyrene foam, polyolefin foam, melamine foam, and urethane foam of step a). The method of claim 8, Flame retardant replication of step c) Iii) a liquid inorganic binder; Ii) liquid inorganic binders, and inorganic particles or flame retardants; Iii) liquid organic binders and inorganic particles or flame retardants; Iii) a hybrid binder of a liquid inorganic binder and a liquid organic binder; And Iii) hybrid binder of liquid inorganic binder and liquid organic binder, and inorganic particles or flame retardant Method for producing a flame-retardant foam resin chip selected from the group consisting of. a) foamed or crushed foamed resin; And b) coated on the surface of the crushed or cut particles of a)    Iii) a liquid inorganic binder;    Ii) liquid inorganic binders, and inorganic particles or flame retardants;    Iii) liquid organic binders and inorganic particles or flame retardants;    Iii) a hybrid binder of a liquid inorganic binder and a liquid organic binder; And    Iii) hybrid binder of liquid inorganic binder and liquid organic binder, and inorganic particles or flame retardant    Flame retardant coating selected from the group consisting of Thermal insulation containing a flame-retardant foam resin chip containing. The method of claim 11, The heat insulating material is a heat insulating material that is constructed by spraying or blowing.

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