KR20120022393A - Method of flame retardant to phosphorus flame retardant and expandable graphite using the expandable polystyrene foam and its expanded polystyrene foam - Google Patents

Abstract

PURPOSE: A flame resisting method of expandable polystyrene foam using phosphate flame retardant and expanded graphite and expandable polystyrene foam manufactured with the same method are provided to improve fire retardant characteristic by applying adhesive and the phosphate flame retardant to the flame resisting of the expandable polystyrene foam. CONSTITUTION: A flame resisting method of expandable polystyrene foam using phosphate flame retardant and expanded graphite comprises the following steps: forcibly injecting expandable graphite adhesive which constantly maintains temperature at 5-40deg.C into expandable polystyrene foam; dehydrating and drying in order for the expanded graphite adhesive to coat on bead surface of the expandable graphite adhesive. The expandable graphite adhesive contains 75-98.9wt% of water-soluble adhesive or alcoholometer adhesive, 1-15 wt% of 50-150 mesh expandable graphite, and 0.1-10 wt% of 250-5,000 mesh phosphate flame retardant.

Description

TECHNICAL FIELD OF FLAME RETARDANT TO PHOSPHORUS FLAME RETARDANT AND EXPANDABLE GRAPHITE USING THE EXPANDABLE POLYSTYRENE FOAM AND ITS EXPANDED POLYSTYRENE FOAM}

The present invention relates to a flame-retardant method of expanded polystyrene foam and a foamed polystyrene foam thereof, and more particularly, to an adhesive liquid containing a phosphorus flame retardant and expanded graphite or phosphorus flame retardant, expanded graphite and loess. After the injection evenly between the beads, dehydration and drying to ensure high flame retardancy by coating and fixing the phosphorus flame retardant and expanded graphite or phosphorus flame retardant and expanded graphite and loess on the bead surface of the expanded polystyrene foam.

Expandable polystyrene, a thermoplastic resin, is made of foamed resin by adding a foaming agent, such as pentane or butane, to a polystyrene resin polymerized with styrene monomer, followed by heat curing, and generating bubbles. Approximately 98% of the volume is air. And the remainder is resin, white, light, good transparency, excellent water resistance, heat insulation, sound insulation, cushioning and molding processability, so that the insulation of buildings, walls and ceilings of prefabricated buildings or buildings, various packaging containers, packaging for transportation, freezing It is widely used in various industrial fields such as wall materials, thermal insulation materials, buoyancy materials, ornaments, insulation materials, and daily necessities in warehouses, but it is weak to heat, and its overall shape is changed instantly by large and small embers. Causing a lot of poisonous smoke to kill many lives There.

On the other hand, as a method mainly used for flame retardation of polystyrene foam blowing agents, halogen compounds, metal hydroxides, metal oxides (Al (OH) ₃ , Mg (OH) _2, etc.), halogen phosphate ester compounds, etc., which are flame retardants, may be added to the polystyrene resin. In addition, a foamed polystyrene foam having a predetermined shape is added, and in this case, since the flame retardant must be added in a large amount in order to increase the flame retardancy, mechanical properties such as tensile strength and impact strength of the polystyrene resin are greatly reduced.

In addition, when the flame retardant is coated and dried on the surface of the expanded particles (bead), which is a raw material of the expanded polystyrene, and then foamed to obtain the polystyrene foam, the price of the expanded particles is high, causing a price increase factor of the expanded polystyrene foam. There are problems such as excessive investment and low productivity.

In general, the flame retardant method of the synthetic resin may include a cooling method, a protective film forming method (coating), a dilution method, an active radical absorption method and the like.

The cooling method is a method of suppressing combustion by consuming heat energy that must be maintained in the combustion process by an additive such as aluminum hydroxide, and the protective film forming method (coating) is condensed with a solid or a gas so that the synthetic resin, which is a combustible material, does not come into contact with the base. Phosphorus compounds or phosphorus-based flame retardants are mainly used to form the protective film. Dilution method produces a non-combustible heavy gas during combustion to suppress the reaction between the gases that proceed with combustion to achieve digestion. Antimony trioxide is mainly used, and the active radical absorption method is a method in which a flame retardant absorbs radicals such as H and OH participating in a combustion reaction and suppresses continuous reaction.

The protective film forming method includes a phosphorus-based flame retardant which is nontoxic and excellent in flame retardancy.

An object of the present invention is to provide a foamed polystyrene foam flame retardant method excellent in flame retardancy by applying a non-toxic, flame-retardant excellent flame retardant and an adhesive solution containing expanded graphite rapidly expanded by heat to the flame retardant of the expanded polystyrene foam.

It is another object of the present invention to apply a flame retardant which is highly flame retardant by applying a non-toxic flame retardant having excellent flame retardant and an expanded liquid which expands rapidly due to heat, and an ointment containing a large amount of far infrared rays to the flame retardant of the expanded polystyrene foam. It is characterized by providing a polystyrene foam flame retardant method.

Still another object of the present invention is to provide a foamed polystyrene foam prepared by the above flame retardant methods and endowed with excellent flame retardancy or high flame retardancy.

Another object of the present invention is characterized in that the phosphorous expanded graphite adhesive liquid or phosphorus expanded graphite ocher adhesive liquid injected into the expanded polystyrene foam can be easily and uniformly injected in a high pressure type or a vacuum type. It is done.

In the present invention, the expanded polystyrene foam is post-treated by a method of densely forming fine pores in the expanded polystyrene foam molded from the expanded particles rather than the expanded particles, and then containing phosphorus-based flame retardant in the particulate state and expanded graphite or loess (mixed with ) Forced injection (or inhalation) of adhesive (flame retardant), followed by dehydration and drying to distribute and coat (fix) evenly the phosphorus-based flame retardant and expanded graphite or ocher particles on the surface of the foamed polyester foam and the beads In addition to maintaining flame retardancy, oxygen (O ₂ ) inflow is blocked by phosphorus-based flame retardants and rapidly expanding graphite (200-250 times volume expansion) during fire or combustion, and soot generation is suppressed by ocher. It is characterized in that it is possible to obtain a foamed polystyrene foam in which the flame retardancy of the) is maintained.

The present invention is a method of flame-retardant treatment by injecting a flame retardant solution into a foamed polystyrene foam in which the micropores are drilled at predetermined intervals, the water-soluble adhesive liquid or alcohol-based adhesive liquid 98.9 ~ 75wt% and 50 ~ 150mesh expanded graphite 1 ~ 15wt% And the phosphorus-based flame retardant of 250-5,000mesh and the phosphorus-based expanded graphite adhesive liquid, which is kept at a constant temperature of 5 ° C. to 40 ° C., is forcibly injected into the expanded polystyrene foam, followed by dehydration and drying to expand the phosphorous expanded graphite adhesive liquid. It is characterized in that the coating on the bead surface of the polystyrene foam.

In addition, the present invention is a method of flame-retardant treatment by injecting a flame retardant solution into a foamed polystyrene foam in which the micropores are drilled at a predetermined interval, the water-soluble adhesive liquid or alcohol-based adhesive liquid 95.9 ~ 60wt%, 50 ~ 150mesh expanded graphite 1 ~ 15 wt%, 200 ~ 1000mesh loess 1 ~ 15wt% and phosphorus flame retardant 0.1 ~ 10wt% and phosphorus expanded graphite ocher adhesive liquid, which is kept at 5 ℃ ~ 40 ℃ constant temperature, is forcedly injected with expanded polystyrene foam, followed by dehydration and drying It characterized in that the phosphorous expanded graphite ocher adhesive liquid is coated on the bead surface of the expanded polystyrene foam.

In addition, the present invention, the phosphorus-based flame retardant is inorganic or organic, ammonium phosphate (Mono Ammonium Phosphate), ammonium poly phosphate (Ammonium Poly Phosphate), red phosphorus (Red Phosphorus), triaryl phosphate, tricresyl phosphate ( Tricresyl Phosphate, Triethyl Phosphate, Triphenyl Phosphate, Dimethyl methylphosphate, Halo Alkyl Phosphate, and the like.

In addition, the present invention is characterized in that the injection of the adhesive liquid is any one of high pressure or vacuum, the pressure of the pressure is 0.5 ~ 6㎏ / ㎠, the suction of the vacuum is characterized in that the 10 ~ 1torr.

In addition, the adhesive solution includes a water-base adhesive and an alcohol-based adhesive, and the water-base adhesive includes acrylic resins and α-olefin resins. ), Polyurethane resin, Ether cellulose, Ethylene-Vinylacetate copolymer emulsion, Epoxy resin, Polyvinyl acetate emulsion, Vinyl chloride resin (Polyvinyl Chloride, PVC), Silicone adhesives, Water based polymer-isocyanate, Styrene-butadiene rubber latex, Phenolic resin, Polyimide (Polyimide), polyvinyl acetate solvent type (PVAc), polystyrene resin (Polystyrene type, PS), polyvinyl alcohol (Polyvinylalcohol, PVAl), polyvinyl pyrrolidone resin (Polyvinylpyr rolidone, PVP), Polyvinylbutyral (PVB), Melamine Resin (Melamine Resin), Urea Resin (UF), Resorcinol Resin, Aqueous (Water), Melamine Resin, Isocyanate It is characterized in that any one or at least one of the system, polystyrene resin solvent, sodium silicate, potassium silicate, lithium silicate, gypsum, cement, inorganic binder.

The alcohol-based (Alchol base) adhesive solution, PVA (Polyvinylalcohol), EVA (Ethylenevinylalcohol), ether cellulose (Ethercellulose), ethylene-vinyl acetate resin emulsion (Ethylene-Vinylacetate copolymer emulsion), phenolic resin (Phenolic resin), poly Polyvinyl acetate solution type (Polyvinyl acetate solvent type, PVAc), polystyrene resin (Polystyrene type, PS), polyvinyl butyral resin system (Polyvinylbutyral, PVB), characterized in that any one or at least one.

In another aspect, the present invention is characterized by providing a foamed polystyrene foam which is prepared by the flame-retardant method of the substrate is given a high flame retardancy.

The present invention is highly flame retardant because the phosphorous expanded graphite adhesive or phosphorous expanded graphite ocher adhesive liquid, which is forcedly injected by high pressure or vacuum, penetrates into the voids between the beads of the expanded polystyrene foam and is uniformly coated and fixed on the surface of the beads. ), It is effective to obtain expanded polystyrene foam.

In addition, according to the present invention, fine pores with a tight gap are formed to a predetermined depth (approximately two-thirds depth) of the expanded polystyrene foam by needle punching, and the phosphorous expanded graphite adhesive or phosphorous expanded graphite ocher adhesive is more easily penetrated. As it is coated and solidified, it is flame-retardant and yellow soil suppresses soot generation and a large amount of far-infrared rays are generated to have a beneficial effect on the surroundings and the human body, and carbon dioxide (CO ₂ ) is caused by the rapid and rapid expansion of expanded graphite and the action of phosphorus-based flame retardants. As the film is formed, the inflow of external oxygen (O ₂ ) is blocked, so that it is self-extinguishing.

In addition, the present invention is environmentally friendly because it uses a material harmless to the human body, and the present invention is because the amount of formaldehyde released from the expanded polystyrene foam by the action of ocher is almost almost eliminated or greatly reduced, such as sick house syndrome, etc. Pollution problem is solved, and also has the effect of air purification, insect repellent and far-infrared rays beneficial to the human body by the action of ocher.

In addition, the phosphorus-expanded graphite adhesive liquid or phosphorus-expanded graphite ocher adhesive liquid of the present invention is water-soluble or alcohol-based or inorganic, which does not use an organic solvent, and thus does not generate toxic gases or dusts, and thus is harmless to humans and does not cause pollution. It is environmentally friendly.

In addition, the present invention has the effect that can be safely and simply working by injecting the phosphorous expanded graphite adhesive liquid or phosphorous expanded graphite ocher adhesive liquid into the expanded polystyrene foam by a predetermined pressure or vacuum absorption input.

In the present invention, when forcibly injecting the phosphorus-expanded graphite adhesive or phosphorus-expanded graphite ocher adhesive, when vibrating the adhesive with an ultrasonic vibrator, the surface tension is weakened by the dispersing action and deeply into the bead particles of the expanded polystyrene foam. It is a very useful invention which has the effect of penetrating and further improving flame retardancy.

In the following description of the present invention, detailed descriptions of related well-known structures and functions will be omitted in order not to obscure the subject matter of the present invention.

The present invention is a post-treatment method, not a pretreatment method that flame-retards the bead surface before the foam is formed. That is, a plurality of fine holes are formed in the foamed polystyrene foam at predetermined intervals by using a needle punching machine so that the flame-retardant adhesive liquid can be injected into the inside, and then phosphorus-expanded graphite adhesive or phosphorus-expanded graphite ocher adhesive is added and then dehydrated. And a post-treatment method of drying and coating to achieve a high flame retardancy.

Preferred embodiments of the present invention are as follows.

One. Example (1): foaming using phosphorus expanded graphite adhesive liquid Of polystyrene foam  Flame Retardant

Flame-retardant method of the expanded polystyrene foam using a phosphorous expanded graphite adhesive liquid, after forming a phosphorous expanded graphite adhesive liquid and injecting a proper amount by a high-pressure injection, or by suctioning an appropriate amount by a vacuum suction method so as to penetrate between the beads constituting the expanded polystyrene foam, respectively. By dehydration and drying, the phosphorus-expanded graphite adhesive liquid adheres to the bead surface and is coated to achieve high flame retardancy of the expanded polystyrene foam.

One). Phosphorus-expanded graphite adhesive composition

Highly flame-retardant phosphorus-expanded graphite by mixing 98.9-75wt% of water-soluble adhesive or alcohol-based adhesive, 1-15wt% of 50-150mesh expanded graphite, and 0.1-10wt% of 250-5,000mesh phosphorus flame retardant. Obtain an adhesive solution.

The phosphorus-based flame retardant includes non-halogen-based inorganic materials and organic materials, all of which may be used in the present invention.

As the phosphorous flame retardant has a smaller particle size, the penetration force is increased between the beads of the expanded polystyrene foam, thereby showing homogeneity and improved flame retardancy. Therefore, in the present invention, 250mesh ~ 5000mesh, which is easily penetrated between the beads of the expanded polystyrene foam and adheres to the surface of the beads by dehydration and drying, is coated (fixed or bonded or bonded).

The expanded graphite forms a carbon dioxide (CO ₂ ) film while rapidly expanding in a volume of 200 to 250 times at a temperature of 700 ° C. or more (combustion heat) to extinguish fire by blocking oxygen (O ₂ ) inflow.

In addition, according to the present invention, fine pores with a tight gap are formed to a predetermined depth (approximately two-thirds depth) of the expanded polystyrene foam by needle punching, and the phosphorous expanded graphite adhesive or phosphorous expanded graphite ocher adhesive is more easily penetrated. As it is coated and solidified, it is flame-retardant and yellow soil suppresses soot generation and a large amount of far-infrared rays are generated to have a beneficial effect on the surroundings and the human body, and carbon dioxide (CO ₂ ) is caused by the rapid and rapid expansion of expanded graphite and the action of phosphorus-based flame retardants. As the film is formed, the inflow of external oxygen (O ₂ ) is blocked, so that it is self-extinguishing.

When the mixing amount of the phosphorus-based flame retardant and expanded graphite is small, the flame retardant effect is decreased, but when the flame retardant effect is increased, the flame retardant effect is increased, but the characteristics of the foamed polystyrene foam or the viscosity of the adhesive liquid rises, so there is a problem in the injection and suction, so that the adhesive liquid and phosphorus flame retardant And the mixing ratio of expanded graphite is suitably adjusted in the above range.

In the present invention, a predetermined surfactant (eg, alkylnaphthalenesulfonate, sodium dialkylsulfosuccinate, etc.) may be used within a range that does not change the physical properties of the expanded polystyrene foam to facilitate penetration of the adhesive liquid. Other additives known to help improve flame retardancy may be used in combination.

2). firing Of polystyrene foam  Flame retardant treatment

The surface of the bead in which the phosphorus-expanded graphite adhesive liquid constitutes the foamed polystyrene foam is infiltrated by foamed polystyrene foam having micropores punctured at a predetermined interval by force injection or vacuum suction, followed by dehydration and drying. It is coated on to achieve high flame retardancy.

In the dehydration process, the phosphorus-expanded graphite adhesive solution excessively added is dehydrated, the phosphorous-expanded graphite adhesive liquid is uniformly coated on the entire bead surface, and the surfaces of the beads maintained in the void state while being solidified by drying are highly flame-retardant.

2. Example (2): foaming using phosphorus-expanded graphite ocher adhesive Of polystyrene foam  Flame Retardant

One). Phosphorus-expanded graphite ocher adhesive composition

95.9 ~ 60wt% of water-soluble adhesive or alcohol-based adhesive, 1 ~ 15wt% of expanded graphite of 50 ~ 150mesh, 1 ~ 15wt% of ocher of 200 ~ 1000mesh and 0.1 ~ 10wt% of phosphorus flame retardant A flame-retardant phosphorus expanded graphite ocher adhesive liquid is obtained.

The phosphorus-based flame retardant includes non-halogen-based inorganic materials and organic materials, all of which may be used in the present invention.

As the phosphorous flame retardant has a smaller particle size, the penetration force is increased between the beads of the expanded polystyrene foam, thereby showing homogeneity and improved flame retardancy. Therefore, in the present invention, 250mesh ~ 5000mesh, which is easily penetrated between the beads of the expanded polystyrene foam and adheres to the surface of the beads by dehydration and drying, is coated (fixed or bonded or bonded).

The expanded graphite rapidly expands the volume 200-250 times at a temperature of 700 ° C. or higher (combustion heat) to form a carbon dioxide (CO ₂ ) film to block fire of oxygen (O ₂ ) and to extinguish fire by itself, and the ocher has high heat resistance. It suppresses soot generation and removes or greatly reduces the formaldehyde emitted from expanded polystyrene foam, thereby solving environmental pollution problems such as sick house syndrome, and it is also beneficial to air purification, insect repellency and human body by the action of ocher. It is an environmentally friendly material that emits far infrared rays.

When the mixing amount of the phosphorus-based flame retardant, expanded graphite and loess is small, the flame retardant effect is lowered, if the amount of the flame retardant effect is increased, but the properties of the expanded polystyrene foam or the viscosity of the adhesive liquid rises, there is a problem in the injection and suction, so the adhesive liquid and The mixing ratio of the phosphorus flame retardant and expanded graphite and loess is appropriately adjusted in the above range.

In the present invention, a predetermined surfactant (eg, alkylnaphthalenesulfonate, sodium dialkylsulfosuccinate, etc.) may be used within a range that does not change the physical properties of the expanded polystyrene foam to facilitate penetration of the adhesive liquid. Other additives known to help improve flame retardancy may be used in combination.

2). firing Of polystyrene foam  Flame retardant treatment

The phosphorus-expanded graphite ocher adhesive liquid prepared above is infiltrated with foamed polystyrene foam having micropores perforated at a predetermined interval by forced injection or vacuum suction, followed by dehydration and drying to form the expanded polystyrene-foam adhesive liquid forming the expanded polystyrene foam. It is coated on the surface to achieve high flame retardancy.

In the dehydration process, the phosphorus-expanded graphite adhesive solution excessively added is dehydrated, the phosphorous-expanded graphite adhesive liquid is uniformly coated on the entire bead surface, and the surfaces of the beads maintained in the void state while being solidified by drying are highly flame-retardant.

The present invention is formed by using a needle punching machine to form fine pores (0.5 mm ~ 2 mm size) in a compact space formed in expanded polystyrene foam and then 5 ° ~ ~ containing phosphorus expanded graphite adhesive or phosphorous expanded graphite ocher adhesive liquid By injecting (or inhaling) the adhesive at 40 ° C evenly to coat and solidify it, expandable graphite (expanded 200 to 250 times the volume at temperatures above 700 ° C) and carbon dioxide (CO ₂ ) by phosphorus-based flame retardants As the film is formed, oxygen (O ₂ ) inflow is blocked and self-extinguishing, a large amount of far-infrared rays are generated by the action of ocher, and soot generation is suppressed to achieve high flame retardancy.

The phosphorus-based flame retardant can be largely divided into inorganic and organic, and may include ammonium phosphate (Mono Ammonium Phosphate), ammonium poly phosphate (Ammonium Poly Phosphate), red phosphorus (Red Phosphorus), triaryl phosphate, tricresyl phosphate ( Tricresyl Phosphate, Triethyl Phosphate, Triphenyl Phosphate, Dimethyl methylphosphate, Halo Alkyl Phosphate, and others are listed below. , And various as listed in 3, in the present invention is any one of the phosphorus-based flame retardants listed in Tables 1, 2, 3, or at least any one of the phosphorus-based flame retardants listed in Tables 1, 2, 3.

Red phosphorus, ammonium phosphate, ammonium polyphosphate, etc. are used as an inorganic type of phosphorus flame retardant. The red phosphorus (赤 燐, Red Phosphorus) is to prevent the decomposition in the condensation phase and to increase the carbonization rate, flame retardant action is mainly used in nylon epoxy resin and the like. Ammonium phosphate is used in cellulose, textiles, paper, wood, and the like, and ammonium polyphosphate is added to polyene, ethylene-vinyl acetate, urethane elastomers by softening through carbonization.

The organic type of the phosphorus flame retardant includes aliphatic organic phosphorus additives and haloalkyl phosphates as shown in Table 1 below, wherein the chloroalkyl functional group prevents the flame retardant from evaporating or dissolving in water. Triaryl phosphate among aromatic phosphates was first synthesized 80 years ago and used as a flame retardant of cellulose nitrate or acetate which is combustible, and has been used as a vinyl plastic flame retardant since the mass production of PVC. Its main uses are automotive interiors, wire insulators, conveyor belts, vinyl foams, etc. and recently, it is used in flexible polyurethane foams with polybromide additives. Representative aromatic phosphate types and characteristics are shown in Table 2 below.

Red phosphorus (赤 燐, Red Phosphorus) included in the phosphorus-based flame retardant refers to all of the isotopes (sometimes including black 널리), such as Zarin (紫 燐) and honglin (紅 燐) usually, Jarin and other isotopes It refers to the solid solution of 溶, which is not easily obtained in a laboratory, and is manufactured on an industrial scale by mixing calcium phosphate with coke, sand, etc. and heating it in an electric furnace.

This is called huanglin (黄 燐), again blocking the air is heated to about 260 ℃ to make red phosphorus. The recipe, in other conditions, takes on a multicolored color from violet to red.

Triple point is about 590 degreeC and specific gravity 2.l-2.28. Even when left in the air, it does not generate phosphorescence because it is different from yellow phosphorus. Insoluble in water and carbon disulfide Compared with sulfur, chemical reactivity is inactive and does not react unless it is heated to high temperatures. The ignition temperature in air is 260 ° C. In addition, yellow phosphorus is toxic, but red phosphorus is nontoxic, and it becomes a raw material of phosphorus compound in addition to manufacturing raw materials such as matches and softening.

The characteristics of the organophosphorus compound having a hydroxyl group are shown in Table 3 below. As the flammability of the reinforced urethane foam used in buildings and transportation vehicles is a great risk, many efforts have been made to develop a flame retardant, and one of them is a phosphorus having a hydroxyl group. It was developed in the context of introducing a compound, but not many commercialized.

Phosphorus-containing methylol compounds are mainly used in fabrics such as cotton and blends, and are already commercialized in industrial garments, military uniforms, hospital supplies, curtains, bedding, and children's pajamas. Efforts have been made to make unsaturated phosphorus compounds, ie vinyl or allyl phosphorus compound flame retardants, but not many are commercially available.

In the flame retardant mechanism, as shown in the following chemical structural formula, polyphosphoric acid metaphosphate is produced by pyrolysis, and the blocking effect by char produced by the formation of a protective layer by the phosphoric acid layer and dehydration by polymethic acid is mainly acted. do.

Flame Retardant Mechanism Chemical Structural Formula

Although mainly effective in the solid phase, H atoms are stabilized as H ₂ in the gas phase as shown in the following reference.

Since the phosphorus-expanded graphite adhesive liquid or phosphorus-expanded graphite ocher adhesive liquid is a liquid, the energy reduction is small, and it penetrates into the inside of the expanded polystyrene foam through the fine pores formed by needle punching, and more easily penetrates between the bead supply and is highly flame-retardant. A fine space is formed between the beads and the beads, and the spaces are connected to each other to facilitate the injection of the phosphorous expanded graphite adhesive or the phosphorous expanded graphite adhesive, and is dispersed between the beads of the expanded polystyrene foam by ultrasonic vibration. It evenly penetrates into the voids.

The micropores have a size of 0.5 mm to 2 mm to sufficiently penetrate and penetrate the liquid-based expanded graphite adhesive liquid or the phosphorus-based expanded graphite ocher adhesive liquid.

In the present invention, ocher not only suppresses the generation of soot, but also generates a large amount of far-infrared rays, which acts beneficially to the surroundings and the human body.

And, if the flame retardant treatment with only ocher and phosphorus-based flame retardant is reduced self-extinguishing rate, including expanded graphite blocks the inflow of external oxygen (O ₂ ) as the carbon dioxide (CO ₂ ) film is formed by the rapid and rapid expansion of the expanded graphite Self-extinguishing is achieved so that the fire can be extinguished early.

In addition, the expanded graphite is a gas containing chemicals generated by the heat of combustion, and as a result, scaly graphite rapidly expands to a volume of 200 to 250 times, and is stable to heat and chemicals (CO ₂ Flame-retardant effect is formed by solid state method, and the larger the particle, the larger the expansion volume and the expansion start temperature is determined according to the chemicals used.

The phosphorus expanded graphite adhesive or phosphorus expanded graphite ocher adhesive is water-soluble or alcohol-based, and the viscosity is about the same as or similar to that of the flame retardant that is commonly used to be easily injected into the expanded polystyrene foam.

As the water base adhesive solution, an acrylic resin, an α-olefin resin, an urethane resin, an ether cellulose, an ethylene-vinyl acetate emulsion, Ethylene-Vinylacetate copolymer emulsion, Epoxy resin, Polyvinyl acetate emulsion, Polyvinyl Chloride (PVC), Silicone (Silicone adhesives), Water based polymer (isocyanate) -isocyanate, Styrene-butadiene rubber latex, Phenolic resin, Polyimide, Polyvinyl acetate solvent type (PVAc), Polystyrene resin type, PS), polyvinyl alcohol (Polyvinylalcohol, PVAl), polyvinyl pyrrolidone resin (Polyvinylpyrrolidone, PVP), polyvinyl butyral resin (Polyvinylbutyral, PVB), melamine resin (Melamine resin ), Urea resin (UF), resorcinol resin, water-based, melamine resin, water-based polymer-isocyanate, polystyrene solvent type , PS), sodium silicate, potassium silicate, lithium silicate, gypsum, cement, inorganic binder and the like, and one or at least one of them is mixed.

Also, alcohol-based adhesives include PVA (Polyvinylalcohol), EVA (Ethylenevinylalcohol), Ether cellulose, Ethylene-Vinylacetate copolymer emulsion, Phenolic resin, Examples of polyvinyl acetate resin type (Polyvinyl acetate solvent type (PVAc), polystyrene type (Polystyrene type, PS), polyvinyl butyral resin type (Polyvinylbutyral, PVB), etc., one or at least one of them are mixed do.

Acrylic resin is a liquid flame retardant whose main component is acrylic acid (CH2 = CHCOOH) and a dielectric. Reaction system. The first generation (FGA) that involves chemical reactions during curing and bonding process, the second generation (SGA) that undergoes polymerization reaction, and the curing of radical polymerization by curing the energy of urethane acrylate and epoxy acrylate with ultraviolet rays Is called the third generation (TGA).

At present, SGA two-part type which separates main ingredient liquid and hardening accelerator is the mainstream. Mixing them causes redox polymerization (a type of radical polymerization) to cure and bond. The liquid and the curing agent are alternately applied to the adherend to be bonded, and then pressed and bonded. It is excellent in chemical resistance and physical properties, adhered at room temperature or lower, and can be adhered even if there is some oil film on the surface of the adherend. It is used in many fields such as electrical and electronic products, vehicles, construction, and metals. It is also considered as a structural adhesive due to its excellent durability.

(alpha) -olefin type ((alpha) -Olefin resin) The adhesive which has a copolymer component of isobutylene and maleic anhydride which is a kind of alpha-olefin as a main component. Solution system (water system). A curing agent is added to the liquid to which fillers, such as calcium hydroxide, latex, and a metal oxide, were added to the copolymer resin aqueous solution, and it hardens | cures and adheres. Along with evaporation of the solvent, crosslinking with calcium hydroxide occurs, thereby improving adhesion. It is used for plywood, woodworking products and building construction from the process developed as wood adhesive which is excellent in heat resistance and creep resistance and does not use formaldehyde. The room temperature curing type is strongly alkaline above pH 12, so it is necessary to pay attention to the contamination of wood. Neutral type requires heating to cure. Moreover, (alpha)-olefin maleic anhydride resin can be used also for the protective colloid of an emulsion and latex.

Polyurethane resin is a generic term for adhesives having a urethane group -NHCOO-. In a broad sense, it includes an adhesive derived from an isocyanate group (NCO-) or a hydroxyl group (OH-) and compounded. Reaction system. The raw material can be selected from many kinds, and can further impart various physical properties through the additive. In the two-component type, a polyol having a hydroxyl group at the end and a polyisocyanate or a urethane prepolymer having an isocyanate group at the end are mixed and mixed to cause a chemical reaction to cure and adhere. Although room temperature adhesion is possible, adhesive strength can be raised by heating. It is excellent in weather resistance, oil resistance, and cold resistance, and is used for bonding laminate films for food packaging for structural materials such as metals, ceramics and plastics. One-part type hardens and bonds by mixing or heating a mixture of a urethane prepolymer and a catalyst. It is used for industrial and construction, and especially in the commercial field, it is replacing the two-component epoxy resin adhesive. If the sealing is insufficient, troubles such as hardening of the liquid surface tend to occur, so it is necessary to pay attention to storage.

Ether cellulose is an adhesive based on ether derivative cellulose. A kind of cellulose adhesive. Methylcellulose (MC) and carboxymethyl cellulose (Sodium Carboxymethylcellulose, CMC) are used as adhesives. Solution system (water system). MC aqueous solution has a viscosity in an initial state, and forms an elastic film after hardening. Used for wallpaper bonding or leather. CMC aqueous solution, which is a kind of food thickener, has viscosity and thickening property and is used in the field of fiber or paper bonding.

Ethylene-vinyl acetate resin emulsion (Ethylene-Vinylacetate copolymer emulsion) is an adhesive mainly containing an emulsion of a resin copolymerized with ethylene vinyl alcohol (EVA) and vinyl acetate. 10% to 30% of an ethylene monomer is mixed with a vinyl acetate monomer, emulsion-polymerized under high pressure, and a turbid aqueous solution is emulsified. It has excellent water resistance, weather resistance, alkali resistance and fast adhesion speed than emulsion of vinyl acetate resin monomer, and is therefore also used for bonding synthetic resins such as lamination using mortar admixtures, plastic sheets, and the like in bookbinding, umbilical cord and the like. In order to improve adhesive force and workability, many organic solvents were added, but in order to cope with environmental problems, a solvent-free type is also recently developed.

Epoxy resin is an adhesive based on epoxy resin. Reaction system. When a curing agent such as an amine is added to the epoxy resin prepolymer obtained by condensation reaction between bisphenol A and epichlorohydrin, graft polymerization occurs to cure and adhere over time. It has high initial adhesiveness and is generally excellent in water resistance, moisture resistance, chemical resistance, electrical insulation, etc., and has excellent strength and heat resistance regardless of the type of adherend. Moreover, the adhesive performance can be variously designed by selecting the type of epoxy resin and the kind of hardening | curing agent. Starting with space aircraft, it is used in fields requiring high reliability, such as civil engineering, construction, electrical and electronic components, and automobiles. The adhesion method is dependent on the choice of curing agent, and in order to achieve room temperature curing, two liquids containing polyamide, aromatic sulfonic acid, or the like as a curing agent are used. When aromatic amines or the like are used, they become thermosetting and can be monolithic. In order to improve the desorption resistance and impact resistance, polymers such as nylon and isocyanate are widely used as structural adhesives. Epoxy clock conductive adhesive is prepared by adding precious metal powder to one-component epoxy resin adhesive. The metal used is rich in silver powder and is used for metal bonding as a solder substitute.

Polyvinyl chloride solvent type (PVC) is PVC resin adhesive and PVC dope cement. Solution system. Gel-like liquid in which a copolymer with a resin monomer or vinyl acetate is dissolved in a solution. The type in which nitrile rubber is added to the solution is used for vinyl chloride pipe joints and the like for bonding vinyl chloride resin. In particular, a plasticizer with a vinyl chloride resin having a small particle diameter is called a vinyl chloride sol and is used for metal bonding applications.

A polyvinyl acetate emulsion is a milky white aqueous solution in which an emulsion of polyvinyl acetate is emulsified by emulsifying and polymerizing a Povar or the like as a protective colloid. By evaporation of water, the particles of the resin are fused to harden and adhere to a transparent film. In response to environmental problems, types that do not use phthalic esters of plasticizers have been developed. Although it is inexpensive, it is easy to apply | coat, and it can respond to various uses by changing the composition of a polymer, in order to be inferior to heat resistance, water resistance, and solvent resistance, it may mix with other resin for the purpose of such improvement. Used for bonding paper, fiber, woodworking, plywood, etc., commercial woodworking bonds are very familiar.

Polychloroprene rubber (CR) is a contact-type adhesive, which is mainly composed of chloroprene rubber [(-CH2-CCI = CH-CH2-) n] and phenolic resin. Solution system. A liquid with strong adhesion, added with alkyl phenol resins and dissolved in a solvent in order to improve workability while utilizing the good adhesion properties of chloroprene rubber. Can be adhered to (contact bonding). It is widely used for industrial purposes from its ease of use and high performance, and is familiar as a yellowish brown adhesive in a tube at home. In order to further improve heat resistance and durability, a polyisocyanate compound is added and used. The functional endowment is for bonding soft vinyl chloride resin obtained by graft polymerization with methyl methacrylate.

Silicone adhesives are adhesives based on organopolysiloxanes. There are condensation curing type and addition curing type. Reaction system. Condensation hardening type is a liquid or paste form which mixed the organopolysiloxane which has a hydroxyl group at the terminal, and a crosslinking agent. After application, it is reacted with moisture in the air to start curing from the surface, finally forming a hardened layer having rubber elasticity. It is necessary to select the kind according to the use situation classified according to the kind of glass gas which arises at the time of condensation reaction. Forms and main uses are a jade core type (general purpose), a deacetic acid type (glass adhesion), a deacetone type (for electronic and electrical), an amide type (building), etc. The addition curing type is a two-component type divided into an organopolysiloxane having a vinyl group at its terminal and a crosslinking agent. It hardens | cures and adhere | attaches by heating using a catalyst. The curing speed is faster than the condensation curing type, and there is no generation of free gas.

Modified Silicone adhesives are adhesives based on polypropylene oxide (modified silicone) having a methyldimethoxysilyl group at its end. Reaction system. Liquid with additives added to the modified silicone polymer. The alkoxy silyl group hydrolyzes by moisture in the air, and hardens and adheres relatively quickly while causing a condensation reaction. Since it has a high strength and does not lose rubber elasticity, the distortion generated during curing can be eliminated. It is strong in shock and is widely used as an adhesive for use in the construction field and everyday home. One-component type | mold can be divided into a modified silicone type, an epoxy modified silicone type, and an acrylic modified silicone type. Each has a different value for shear stress or release force. In the two-component type, the epoxy resin and the organic tin catalyst are made of A agent, and the curing agent for modified silicone resin and epoxy resin is B agent. The hardness can be adjusted by changing the mixing ratio.

Water based polymer-isocyanate is also called an aqueous vinyl urethane-based wood adhesive. Adhesives based on aqueous solutions or emulsion solutions of various hydrophilic polymers and isocyanate compounds as crosslinking agents. Solution system (water system) with the property of water dispersion system. A polyfunctional isocyanate or a prepolymer thereof dissolved in paraffin chloride or the like is added to a polymer aqueous solution or an emulsion solution to which a filler such as calcium carbonate is added to cure and adhere over time. At the beginning of development, it was called aqueous vinylurethane. The curing process is classified into one kind that proceeds to room temperature and two kinds that require heating. It is a water-based adhesive that is excellent in water resistance and does not contain formaldehyde. Wood is mainly used for bonding, and it is also used for complex bonding with plastics, metals, and rubber.

Styrene-butadiene rubber solution (Styrene-butadiene rubber) is SBR-based, SBS-based or SIS-based adhesives. Adhesive based on copolymer of styrene and butadiene. There are two types due to the difference in the polymerization reaction. Solution system. Random copolymerized SBR has a natural rubbery property, and the solvent solution is used as an adhesive, but the adhesive strength is not strong. Block copolymerized SBR has the property of vulcanized rubber. Solvent solutions are used to bond rubber, glass, metal, and foamed styrols with the addition of imparting agents. As the solute rubber, styrene-butadiene block copolymer (SBS) or styrene-isoprene block copolymer (SIS) is also used.

Styrene-butadiene rubber latex is an adhesive mainly composed of a copolymer of styrene and butadiene on latex. Water dispersion system. Milky liquid. Styrene ratios less than 50% (SBR latex) are mainly used for carbocysylated SBR latex (c-SBR) or copolymerization with vinyl virine, and for flooring adhesives such as carpets and fiber cord adhesives for tires. Styrene ratios of 50% or more (SB latex) are relatively light in color and are used in the field of paper coating.

Nitrile rubber (NBR) is a liquid in which nitrile rubber is dissolved in a solvent. Solution system. Phenolic resin type is used for brake lining, metal, wood and leather because of its excellent oil resistance and solvent resistance. The type which mix | blended polyvinyl chloride is used for film adhesion etc.

Nitrocellulose is one of the ester derivatives of cellulose. Adhesive based on nitrocellulose (nitrogenated cotton). It is classified as a kind of cellulose adhesive. A liquid in which nitrocellulose is dissolved in a solvent. Since it is quick to dry and harden and is suitable for bonding leather, paper, wood, ceramics and the like, it is sold as a tubular household adhesive. Although it is inexpensive, it is easy to discolor and flammable, so care must be taken with handling.

Phenolic resin is an adhesive based on a resorre type phenolic resin. Solution system (water system, formaldehyde system). Aqueous solution or alcohol solution of phenol and formaldehyde subjected to condensation reaction. It heats to 130 degreeC or more, hardens | cures, and adhere | attaches. Although the alcohol type can adhere to room temperature, it is necessary to add a hardening | curing agent separately and it is inferior to workability. It is excellent in water resistance, heat resistance and weather resistance, but weak in impact and strength. Moreover, since the heating temperature is high and the adhesive discolors to reddish brown after curing, the use range is limited. However, it has high adhesive strength to various adherends such as wood, metal and glass, and is used for ships or concrete panels.

Polyimide (Polyimide) is an adhesive containing a low molecular polymer of the polyimide (PI) type belonging to an aromatic heterocyclic polymer as a main component. It is classified as a kind of polyaromatic adhesive. Reaction system. Properties obtained by impregnating glass fiber with a liquid obtained by dissolving polyamide carboxylic acid in dimethylacetaldehyde. While heating to 400 ° C. or higher to remove the solvent, dehydration ring closure reaction occurs in the process to imidize, cure and bond. As an adhesive, it corresponds to the highest level. It has heat resistance of 350 degreeC or more, and is excellent also in oxidation resistance. Demand is growing in the aerospace and electrical industries.

Polyvinyl acetate resin type (Polyvinyl acetate solvent type, PVAc) is a PVAc adhesive. Adhesive based on vinyl acetate resin. Solution system. A liquid having a viscosity obtained by dissolving a vinyl acetate polymer in alcohol. Some resins are filled with other resins for modification. It is excellent in durability but inferior in water resistance and creep resistance. It is suitable for adhesion of foamed styrol because it does not contain soluble components including wood, so it is used for building materials, boards and the like.

Polystyrene solvent type (PS) is PS resin adhesive and PS dope cement. Adhesive based on polystyrene resin. Solution system. A gel-like liquid in which resin is dissolved in a solvent such as acetone. It is mainly used as a pool for plastic models.

Polyvinyl alcohol system (Polyvinylalcohol, PVAl) is a water dispersion system. PVA used in the additive of an emulsion adhesive as an emulsifier has an adhesive force alone. When water evaporates, it forms a transparent film that hardens and bonds. Familiar with office liquid glue for woodworking and paper bonding applications. It is also known as a generally speaking laundry pool.

Polyvinylpyrrolidone resin system (Polyvinylpyrrolidone, PVP) is a solution system (aqueous) near solid. Sodium fatty acid is added to the water-soluble PVP to make it almost solid, and glycol type is added and activity is given. Usually, although viscosity is low, when viscosity is added when applying, it becomes viscous. By using this property, the stick paste formed in the rod shape is widely used for stationery and office work.

Polyvinyl butyral resin (Polyvinylbutyral, PVB) is an adhesive mainly containing polyvinyl butyral resin, which is a kind of polyvinyl alcohol. Reaction system. It hardens and adheres to the liquid which added sulfuric acid as a suspension to the methanol solution of polyvinyl alcohol by stirring, mixing butylaldehyde, heating. It has excellent transparency, light resistance, impact resistance and vibration resistance, and is used for safety glass of automobiles.

Polybenzimidazole system (Polybenzimidazole, PBI) is an adhesive mainly containing polybenzimidazole (PBI) belonging to an aromatic heterocyclic polymer. It is classified as a kind of polyaromatic adhesive. Reaction system. Properties of glass fiber impregnated with low molecular polymer of PBI. It is heated to about 350 ° C. to cure and adhere. As an adhesive, it corresponds to the highest level. With heat resistance of 350 ° C. or higher, demand is growing in the aerospace and electrical industries.

Polymethylmethacrylate solvent type (PMMA) is an adhesive mainly containing polymethacrylate resin. Solution system. Gel-like liquid in which resin is dissolved in solution. Although a solution has many solvents, such as acetone, there exists also a type using MMA monomer, chloro sulfonation polyethylene, etc.

Melamine resin is an adhesive based on melamine (cyanurylamide). Solution system (water system, formaldehyde system). A syrup-like aqueous solution obtained by adding a catalyst to melamine and formaldehyde subjected to condensation reaction. Since monomers are susceptible to precipitation and crystallization, they have been improved by co-condensation (MUF) with urea resins, co-condensation with phenolic resins (MPF), and melamine-phenol-free fish co-condensation (MPUF). Heat to 50 ~ 60 ℃ to cure and bond. It is excellent in durability and heat resistance, and is used as an adhesive for wood such as outdoor plywood.

Urea resin (UF) is an urea-based adhesive. Solution system (water system, formaldehyde system). A small amount of ammonium chloride is added as a curing agent to the urea reacted with the condensation reaction and a syrupy aqueous solution of formaldehyde, and cured and bonded. Solid concentrations are classified into concentrated and unconcentrated types. Concentrates of about 60% solids can be cured at room temperature, but unconcentrated solids of 40 to 50% solids need to be heated to solidify. Although slightly inferior in durability, it is used as an adhesive for wood such as plywood because of its water resistance, low cost and good workability.

Resorcinol resin is an adhesive which contains a resorcinol resin or a phenol-resorcinol resin as a main component. Solution system (water system, formaldehyde system). Paraformaldehyde powder is added as a curing agent, cured and adhered to an aqueous solution in which resorcinor and formaldehyde are condensed with an acid or an alkali as a catalyst and dissolved in water or alcohol. It is possible to bond at room temperature, but if it is heated to about 40 ° C, it is better bonded. Although it is relatively expensive and the adhesive surface is blackish brown, it is excellent in durability and is used for structural materials such as plywood, woodworking products, musical instruments, wooden wires, etc. for wood bonding. Resorcinor and formaldehyde were condensed under alkaline conditions, and formalin, latex and the like were added thereto to react. An aqueous solution or a solvent solution of RFL (Resorcinol Formaldehyde Latex) is used for bonding a fiber cord of a tire.

In the above-mentioned foamed polystyrene foam is punched by a needle punching machine or the like, a plurality of fine holes (0.5 mm to 2 mm size) are drilled at a tight interval (3 mm to 15 mm intervals) to form a phosphorous expanded graphite adhesive liquid or phosphorous expanded graphite ocher adhesive The injection of liquid is more uniform and evenly penetrated.

Phosphorus-based flame retardant in the present invention, the smaller the particle size, the higher the penetration force between the beads of the expanded polystyrene foam shows homogeneity and also improves flame retardancy. Therefore, in the present invention, 250mesh ~ 5000mesh, which is easily penetrated into the voids between the beads of the expanded polystyrene foam, is coated and solidified by being adhered to most of the beads by dehydration and drying, preferably expanded graphite (50 ~ 150mesh) and loess (200). ~ 1000mesh) is also included in the size of the phosphorus-based flame retardant is penetrated together into the pores between the beads of the foamed polystyrene foam is adhered to the surface of the beads mostly by dehydration and drying, coating and fixing.

In the present invention, the phosphorous expanded graphite adhesive liquid or the phosphorus expanded graphite ocher adhesive liquid is characterized in that it can be easily achieved uniformly by a high pressure type or a vacuum type.

In the case of the high pressure type, the foamed polystyrene foam having finely spaced micropores formed by punching is placed on a workbench, and then the injection chamber is sealed to the upper surface of the foamed polystyrene foam to be sealed at 5 to 40 ° C. Supplying the phosphorus-expanded graphite adhesive liquid or phosphorus-expanded graphite ocher adhesive liquid maintained at a constant temperature at a high pressure to inject a predetermined time or a predetermined amount evenly, separating the injection chamber from the foamed polystyrene foam, the injection chamber is separated, the phosphorous expanded graphite The expanded polystyrene foam in which the adhesive liquid or phosphorus expanded graphite ocher adhesive is evenly injected is dehydrated with a dehydrator to dehydrate the phosphorus expanded graphite adhesive or phosphorus expanded graphite ocher adhesive, thereby dephosphorizing the particulate phosphorous flame retardant and the expanded graphite or particulate phosphorous flame retardant. To ensure that the expanded graphite and loess are evenly coated on the bead surface, Negatively drying the foamed polystyrene foam at a predetermined temperature for a predetermined time so that the coated phosphorous flame retardant and expanded graphite or particulate phosphorous flame retardant, expanded graphite and loess are solidified to obtain foamed polystyrene foam having high flame retardancy. do.

In the case of the vacuum type, the polystyrene foam having a finely spaced gap is formed by punching into a phosphorus expanded graphite adhesive liquid or phosphorus expanded graphite ocher adhesive liquid impregnated tank which is kept at a constant temperature of 5 to 40 ° C., and then impregnated sufficiently. Then, the vacuum chamber is bonded to the upper surface of the foamed polystyrene foam, and then vacuum suctioned with a vacuum pump, uniformly injected for a predetermined time, the vacuum is released, the vacuum chamber is separated, the vacuum chamber is separated, and the phosphorous expanded graphite adhesive liquid or phosphorus When the expanded polystyrene foam in which the expanded graphite ocher adhesive is evenly injected is dehydrated properly with a dehydrator, the phosphorus-based expanded graphite adhesive or the phosphorus-based expanded graphite ocher adhesive is dehydrated while the particulate phosphorous flame retardant and expanded graphite or particulate phosphorous flame retardant and expanded graphite and The ocher is evenly coated on the bead surface, and then the foam As the styrene forms a predetermined temperature at a predetermined time to dry the coating on the particle to which the phosphorus-based flame retardant and the phosphorus flame retardant particulate expanded graphite or expanded graphite as ocher and lock-in it is possible to obtain the flame retardancy of a given height of expanded polystyrene foam.

The temperature of the phosphorus-expanded graphite adhesive liquid or phosphorus-expanded graphite ocher adhesive liquid is kept constant at a temperature of 5 ℃ ~ 40 ℃, high pressure injection pressure is 0.5 ~ 6kg / ㎠, vacuum suction force, For example, 10 to 1 torr.

According to the present invention, by forming a myriad of fine pores having a predetermined depth and a predetermined interval in the molded polystyrene foam, the phosphorous expanded graphite adhesive or phosphorous expanded graphite ocher adhesive is injected into the expanded polystyrene foam by high pressure injection or vacuum suction. Phosphorus-expanded graphite adhesive or phosphorous-expanded graphite ocher adhesive is not only on the surface of the expanded polystyrene foam, but evenly and deeply penetrates into the pores between the beads and the beads, thus bringing the phosphorus-expanded graphite adhesive onto the bead surface. The liquid or phosphorous expanded graphite ocher adhesive is adsorbed, coated and solidified to obtain highly flame retardant expanded polystyrene foam which does not burn (ignite) or change significantly even when exposed for 10 minutes at a direct flame temperature of about 1,000 ° C.

In addition, since almost all of the formaldehyde released from the expanded polystyrene foam by the action of loess is removed or greatly reduced, environmental pollution problems such as sick house syndrome are solved, and the adhesive solution is water-soluble without using an organic solvent. Or alcoholic or inorganic, it is harmless to human body because it does not generate toxic gas or dust.

In the present invention, the surface tension is reduced by activating the interface by maintaining the temperature of the phosphorous expanded graphite adhesive liquid or phosphorous expanded graphite adhesive liquid in the range of 5 ℃ ~ 40 ℃ to inject the expanded graphite graphite adhesive or phosphorous expanded graphite ocher adhesive liquid This is easier, evenly and deeply injected. In addition, the strength of the expanded polystyrene foam is also improved by the phosphorus-based flame retardant and expanded graphite or phosphorus-based flame retardant, expanded graphite and loess which are injected and coated.

In the present invention, when the phosphorous expanded graphite adhesive liquid or the phosphorus expanded graphite ocher adhesive liquid is injected, the injection of the phosphorous expanded graphite adhesive or the phosphorous expanded graphite ocher adhesive may be further promoted.

The ultrasonic wave by the ultrasonic vibrator refers to vibration of 20,000 Hz or more beyond the actual audible frequency in the range of 20 Hz to 20,000 Hz, and when the ultrasonic wave is irradiated in water, a phenomenon in which countless fine cavitation occurs occurs and disappears. When the resonance occurs, the vibration of the bubble generates micro-overflow, causing mass stirring, and when the resonance disappears, the energy is expanded from several hundred thousand to several million times, increasing the pressure and temperature of the bubble. Microthermal and dispersal reactions facilitate the physical and chemical reactions in the medium.

In the present invention, this phenomenon is repeated about 20,000 to 2,000,000 (20㎑ ~ 2MHz) times per second, while the phosphorous expanded graphite adhesive or the phosphorous expanded graphite adhesive is resonated and adsorbed to the pores and bead surfaces between the beads of the expanded polystyrene foam. The coating solidifies and the expanded polystyrene foam achieves high flame retardancy.

As described above, the present invention can be variously substituted, modified, and changed without departing from the technical spirit of the present invention by those skilled in the art to which the present invention pertains. It is not limited.

Claims (8)

A flame retardant method comprising injecting a flame retardant into a foamed polystyrene foam in which micropores are punctured at predetermined intervals;
Phosphorus-expanded graphite containing 98.9-75 wt% of water-soluble adhesive or alcohol-based adhesive and 1-15 wt% of expanded graphite of 50-150 mesh and 0.1-10 wt% of phosphorus-based flame retardant of 250-5,000 mesh and kept at 5 ° C-40 ° C. A flame retardant method of the expanded polystyrene foam using a phosphorus-based flame retardant and expanded graphite characterized in that the adhesive liquid is forcibly injected into the expanded polystyrene foam and then dehydrated and dried to coat the phosphor-based expanded graphite adhesive liquid on the surface of the bead of the expanded polystyrene foam.
A flame retardant method comprising injecting a flame retardant into a foamed polystyrene foam in which micropores are punctured at predetermined intervals;
95.9 ~ 60wt% of water soluble adhesive or alcoholic adhesive, 1 ~ 15wt% of expanded graphite of 50 ~ 150mesh, 1 ~ 15wt% of ocher of 200 ~ 1000mesh and 0.1 ~ 10wt% of phosphorus flame retardant, and 5 ℃ ~ 40 ℃ Phosphorus-expanded graphite ocher adhesive liquid, which is kept at a constant temperature, is forcibly injected into the expanded polystyrene foam, followed by dehydration and drying, so that the phosphorous-expanded graphite ocher adhesive liquid is coated on the bead surface of the expanded polystyrene foam. Flame retardant method of expanded polystyrene foam using.
The method according to claim 1 or 2, The phosphorus flame retardant,
Phosphorous flame retardant and expanded graphite characterized in that at least one of ammonium monophosphate, ammonium polyphosphate, red phosphorus, triaryl phosphate, tricresyl phosphate, triethyl phosphate, triphenyl phosphate, dimethyl methyl phosphate and haloalkyl phosphate Flame retardant method of foamed polystyrene foam used.
The method according to claim 1 or 2,
Injection of the adhesive solution is a flame-retardant method of the expanded polystyrene foam using a phosphorus-based flame retardant and expanded graphite, characterized in that any one of high pressure or vacuum.
The method according to claim 4;
Pressure of the pressure type is 0.5 ~ 6㎏ / ㎠, vacuum suction force of 10 ~ 1torr, flame retardant and expanded graphite using the flame-retardant method of expanded polystyrene foam.
The method according to claim 1 or 2; The water-soluble adhesive liquid,
Acrylic resin, α-Olefin resin, Polyurethane resin, Ether cellulose, Ethylene-vinylacetate copolymer emulsion, Epoxy resin resin, Polyvinyl acetate emulsion, Polyvinyl Chloride (PVC), Silicone adhesives, Water based polymer-isocyanate, Styrene-butadiene rubber latex (Styrene) Butadiene rubber latex, Phenolic resin, Polyimide, Polyvinyl acetate solution type (PVAc), Polystyrene type (PS), Polyvinyl alcohol (Polyvinylalcohol) , PVAl), polyvinylpyrrolidone resin (PVP), polyvinyl butyral resin (Polyvinylbutyral, PVB), melamine resin, urea resin (UF), resor Resorcinol resin, water system, melamine resin, isocyanate, polystyrene resin solvent, sodium silicate, potassium silicate, lithium silicate, gypsum, cement, inorganic binder, characterized in that at least any one or more Flame retardant method of expanded polystyrene foam using phosphorus flame retardant and expanded graphite.
The method according to claim 1 or 2, Alcohol-based adhesive liquid,
Polyvinylalcohol (PVA), Ethylenevinylalcohol (EVA), Ether cellulose, Ether cellulose, Ethylene-Vinylacetate copolymer emulsion, Phenolic resin, Polyvinyl acetate solvent type, PVAc), polystyrene resin (Polystyrene type, PS), polyvinyl butyral resin (Polyvinylbutyral, PVB), any one or at least one or more characterized in that at least one or more flame retardant method of the expanded polystyrene foam using expanded graphite.
The expanded polystyrene foam manufactured by the flame-retardant method of any one of Claims 1 or 2 and given high flame retardancy.