KR20030046551A - A composition of flame retarding foams with waste materials and its preparing method - Google Patents

Abstract

PURPOSE: A flame retardant foam composition using the waste material and its preparation method are provided, to recycle waste materials effectively and to improve stability, mechanical properties and flame retardancy. CONSTITUTION: The foam composition comprises 100 parts by weight of a resin component comprising 0-100 wt% of waste polyethylene, 0-100 wt% of waste ethylene-vinyl copolymer, 0-30 wt% of waste rubber, 0-40 wt% of waste tire rubber powder, 0-100 wt% of polyethylene, 0-30 wt% of nitrile rubber, and 0-50 wt% of ethylene-propylene copolymer; and 120-290 parts by weight of a flame retardant comprising 20-250 parts by weight of Al(OH)3, 20-120 parts by weight of Mg(OH)2, 0-20 parts by weight of magnesium silicate, 0-50 parts by weight of zinc borate, 0-50 parts by weight of zinc sulfate, 0-30 parts by weight of Sb2O3, 0-30 parts by weight of Sb2O5, 0-50 parts by weight of 3-(hydroxy phenyl phosphinyl)propanoic acid or 9,10-dihydro-9-oxa-10-£2,3-di-(hydroxy ethoxy)carbonyl propyl|-10-phosphaphenanthrene-10-oxide, 0-50 parts by weight of tris(chloroisopropyl)phosphate or tris(2-chloroethyl)phosphate, 0-50 parts by weight of diphenyl cresyl phosphate, 0-10 parts by weight of red phosphorus, 0-50 parts by weight of chlorinated paraffin, and 0-30 parts by weight of yellow soil.

Description

A composition of flame retarding foams with waste materials and its preparing method}

The present invention relates to a flame-retardant foam composition and a method for producing the same using waste resources, more specifically waste polyethylene as a waste material (W-PE), waste ethylene vinyl copolymer (W-EVA), waste rubber (W-RUBBER) or ground tire rubber (GTR) and optionally one or more of polyethylene (Virgin-PE), nitrile rubber (NBR) and ethylene propylene copolymer (EPDM). Blended with inorganic and phosphorus flame retardants, foaming agents, crosslinking agents or other additives, this product seeks for efficient recycling of waste plastics, waste rubbers and waste tire rubber powders, while also improving environmental friendliness, stability and mechanical properties. And, in particular, products with excellent flame retardancy and economic efficiency, and various extrusion materials, compression molding or injection molding for various building materials, automobile parts, sporting goods and other industrial products. The present invention relates to a flame retardant foam composition and a method of manufacturing the same, which can be used as a recycled product with economical efficiency while securing environmental friendliness, stability, flame retardancy, and economic efficiency when applied to a wide range of fields.

Existing foams (polyolefin, etc.) are molding compositions widely used in construction, construction, automobiles, sporting goods, and other fields, and are required to be flame retardant due to various regulations around the world and domestically based on environment and stability. The degree of flame retardancy is low, the use of halogen-based flame retardants due to the high human hazard is a situation that is decreasing the scope of application. In addition, there are some differences depending on the materials used as the base resin due to the difficulty of these related industries and diversification of similar substances, but the scope of application is subdivided according to their characteristics. As the scope of application to the furnace is being reduced, and thus, a substitute composition is developed, the market for the foam composition is in an endless competition, and thus, there is a need for development of a product having excellent flame retardancy, particularly economical and physical properties.

Therefore, in the case of foams, flame retardancy and economical efficiency (low cost) are required first. However, most of the industries involved in the production of foams are small and medium-sized companies, which are not satisfied due to the lack of research base and technology, so that most producers still use expensive raw materials and halogen flame retardants. By producing and supplying foams that are harmful to the human body and have low flame retardancy, the company is losing its competitiveness in the era of drastic reduction in added value and the infinite competitiveness (international competitiveness).

Although such a conventional flame retardant is not given a slight difference depending on the specifications of the polyethylene foam composition, if one representative composition is exemplarily, 0.8 to 0.9 parts by weight of crosslinking agent, foaming agent based on 100 parts by weight of low density polyethylene resin The foam composition which consists of 22-24 weight part and 1-1.5 weight part of pigment | dyes is used, The foam of such a composition is generalized by the granulation etc. of the related art as mentioned above.

In the case of a flame-retardant foam having a known oxygen-retardant polyolefin foam and having a limiting oxygen index (LOI) of 26 according to ASTM D 2863, the composition is a resin in which only low-density polyethylene (LDPE) and ethylene vinyl copolymer (EVA) are used alone or blended with flame retardant and other It has been disclosed when the additive is prepared by the addition (Korean Patent Publication No. 10-1997-042714, 1997).

Although such a flame retardant polyolefin foam composition is slightly different according to its specifications, one typical composition of the flame retardant polyolefin foam composition may be used alone, or two or more resins may be mixed. Then, 1 to 20 parts by weight of the binder, 10 to 30 parts by weight of the blowing agent, and 50 to 200 parts by weight of the inorganic flame retardant to 100 parts by weight of the resin composition constituted by mixing alone or two or more functional rubbers for imparting high elastic properties. 10 to 50 parts by weight of the organic halogen flame retardant and 0.7 to 2.0 parts by weight of the crosslinking agent.

On the other hand, in the prior art, waste resources utilization technology for forming and manufacturing various structures using waste plastic and waste tire rubber powder has been developed by the present inventors and has been known as Korean Patent No. 180216. Here, a crosslinking agent such as cumene hydroperoxide and dicumyl peroxide, which is a mixture of waste tire powder and waste plastic and radicalized at high temperature, is instantaneously crosslinked at an appropriate temperature, and injected or extruded to inexpensive press blocks or floorboards or reinforcing rods. It presents useful techniques to be used as a structure. However, such a known technique is a simple molded article that does not impart foamability at all, and thus, when imparting foamability to resins such as waste plastic, deterioration of physical properties due to waste resources can lead to significant quality defects. There is a problem that is difficult to apply. That is, this conventional technology is different from the application of the fundamental technology and the composition of the foam, so this economically advantageous waste resource utilization technology could not be applied to the foam field as it is.

In order to solve these conventional problems, the present inventors have applied for a "foam composition using waste plastic and foam using the same" as Korean Patent Application No. 10-2001-0011276. Here, the present invention suggests a useful technique for economical foam that is not imparted with flame retardancy as the use of waste resources. However, the present invention is not limited thereto, and the present invention is part of the present invention as part of the development of a desirable composition for recycling of various waste polymer materials including waste rubber. Was done.

As such, the conventional polyolefin foam composition causes reduction in the scope of application to a specific field and infinite competition with alternative analogues due to the difficulty of granulation and diversification of related materials in the related art, and thus, firstly, excellent flame retardancy and economical efficiency. As a result, development of a composition to be produced in an advantageous manner is urgent. Nevertheless, in reality, the use of expensive pure raw materials and halogen-based flame retardants that are harmful to the human body is causing a drastic reduction in added value. It is necessary to develop a product such as high flame retardancy.

Accordingly, the present invention takes account of the serious disadvantages of conventional polyolefin foam compositions, in particular flame retardancy and economics, and in view of the serious environmental pollution caused by current scientific developments, waste plastics (W-PE, W-EVA), waste rubber (W-RUBBER), ground tire rubber (GTR), but sometimes one or more of polyethylene (Virgin-PE), nitrile rubber (NBR) and ethylene propylene copolymer (EPDM). It is blended and newly composed using inorganic and phosphorus flame retardants and other additives (foaming agents, crosslinking agents, lubricants, etc.) instead of halogen-based flame retardants, which are harmful to the human body. New flame retardant foam composition that is eco-friendly and has reduced manufacturing cost due to waste resource recycling to maximize economic efficiency To have its purpose.

Another object of the present invention to provide a flame-retardant foam molded by using the composition.

1 is an electron microscope (SEM) photograph confirming the cell structure (A) and the dispersion degree (B) of the additive for the foam sample 1 prepared according to Example 1 of the present invention.

2 is an electron microscope (SEM) photograph confirming the dispersion degree (B) of the cell structure (A) and the additive with respect to the foam sample 4 prepared according to Example 1 of the present invention.

3 is an electron microscope (SEM) photograph confirming the cell structure (A) and the dispersion degree (B) of the additive for the foam sample 7 prepared according to Example 1 of the present invention.

4 is an electron microscope (SEM) photograph confirming the cell structure (A) and the degree of dispersion (B) of the additive for the foam sample 8 prepared according to Example 1 of the present invention.

5 is an electron microscope (SEM) photograph confirming the cell structure (A) and the dispersion degree (B) of the additive for the foam sample 11 prepared according to Example 1 of the present invention.

6 is an electron microscope (SEM) photograph confirming the cell structure (A) and the dispersion degree (B) of the additive for the foam sample 13 prepared according to Example 1 of the present invention.

7 is an electron microscope (SEM) photograph confirming the cell structure (A) and the degree of dispersion (B) of the additive with respect to the foam sample 14 prepared according to Example 1 of the present invention.

8 is an electron microscope (SEM) photograph confirming the cell structure (A) and the dispersion degree (B) of the additive with respect to the foam sample 15 prepared according to Example 2 of the present invention.

9 is an electron microscope (SEM) photograph confirming the cell structure (A) and the dispersion degree (B) of the additive for the foam sample 17 prepared according to Example 2 of the present invention.

10 is an electron microscope (SEM) photograph confirming the cell structure (A) and the degree of dispersion (B) of the additive for the foam sample 23 prepared according to Example 2 of the present invention.

11 is an electron microscope (SEM) photograph confirming the cell structure (A) and the degree of dispersion (B) of the additive for the foam sample 28 prepared according to Example 2 of the present invention.

12 is an electron microscope (SEM) photograph confirming the cell structure (A) and the dispersion degree (B) of the additive with respect to the foam sample 29 prepared according to Example 2 of the present invention.

13 is an electron microscope (SEM) photograph confirming the cell structure (A) and the degree of dispersion (B) of the additive with respect to the foam sample 32 prepared according to Example 2 of the present invention.

14 is an electron microscope (SEM) photograph confirming the cell structure (A) and the dispersion degree (B) of the additive with respect to the foam sample 38 prepared according to Example 2 of the present invention.

15 is an electron microscope (SEM) photograph confirming the cell structure (A) and the degree of dispersion (B) of the additive for the foam sample 39 prepared according to Example 2 of the present invention.

16 is an electron microscope (SEM) photograph confirming the cell structure (A) and the dispersion degree (B) of the additive with respect to the foam sample 40 prepared according to Example 2 of the present invention.

17 is an electron microscope (SEM) photograph confirming the cell structure (A) and the additive dispersion degree (B) with respect to the conventional foam.

The present invention relates to a flame-retardant foam composition containing waste plastic, waste rubber and waste tire rubber powder and comprising at least one of a flame retardant, a crosslinking agent, a foaming agent, a lubricant, a plasticizer and a stabilizer as a common additive, wherein the resin component is waste polyethylene. (W-PE) 0-100 wt%, waste ethylene vinyl copolymer (W-EVA) 0-100 wt%, waste rubber (W-RUBBER) 0-30 wt%, waste tire rubber powder (GTR) 0-40 Wt%, polyethylene (PE) 0-100% by weight, nitrile rubber (NBR) 0-30% by weight, ethylene propylene copolymer 0-50% by weight, and based on 100 parts by weight of the resin component, Al ( OH) ₃ 20-250 parts by weight, Mg (OH) ₂ 20-120 parts by weight, magnesium silicate 0-20 parts by weight, zinc boronic acid 0-50 parts by weight, zinc sulfate 0-50 parts by weight, Sb ₂ O ₃ 0 -30 parts by weight, Sb ₂ O ₅ 0-30 parts by weight, 3- (hydroxyphenylphosphinyl) propanoic acid or 9,10-dihydro-9 0 to 50 parts by weight of oxa-10- [2,3-di- (hydroxyethoxy) carbonylpropyl] -10-phosphazanthrene-10-oxide, tris (chloroisopropyl) phosphate (TCPP), Or 0-50 parts by weight of tris (2-chloroethyl) phosphate (TCEP), 0-50 parts by weight of diphenylcresylphosphate, 0-10 parts by weight of red, 0-50 parts by weight of chlorinated paraffin, and 0-30 parts by weight of ocher. It is contained, but the flame retardant is contained in 120 to 290 parts by weight, characterized in that it contains a conventional additive.

Such a foam composition according to the present invention is a mixture composition of the resin and the flame retardant 110 to 138 ℃ a composition containing 2 to 25 parts by weight of crosslinking agent, 10 to 40 parts by weight of foaming agent and 0 to 10 parts by weight of lubricant as a common additive. It can be prepared by mixing in, then extruding, compressing or injection.

Referring to the present invention in more detail as follows.

Specific examples of the component composition of the composition of the present invention, as a resin component 0-100% by weight of waste polyethylene (W-PE), 0-100% by weight of waste ethylene vinyl copolymer (W-EVA), waste rubber (W-RUBBER) 0-30% by weight, waste tire rubber (GTR) 0-40% by weight, polyethylene (PE) 0-100% by weight, nitrile rubber (NBR) 0-30% by weight, ethylene propylene copolymer 0 It consists of -50 weight%, and as a flame retardant with respect to 100 weight part of such resin components, 20-250 weight part of Al (OH) _3, 20-120 weight part of Mg (OH) _2, 0-20 weight part of magnesium silicates, boron 0-50 parts by weight of zinc borate, 0-50 parts by weight of zinc sulfate, 0-30 parts by weight of Sb ₂ O _3, 0-30 parts by weight of Sb ₂ O ₅ , 3- (hydroxyphenyl Phosphinyl) propanoic acid [3- (Hydroxyphenylphosphinyl) propanoic acid; H-205] or 9,10-dihydro-9-oxa-10- [2,3-di- (hydroxyethoxy) carbonylpropyl] -10-phosphaphenanthrene-10-oxide [9,10 -Dihydro-9-oxa-10- [2,3-di- (hydroxyethoxy) carbonyl propyl] -10-phosphaphenanthrene-10-oxide; H-201] 0-50 parts by weight of tris (chloroisopropyl) phosphate; TCPP], or tris (2-chloroethyl) phosphate [Tris (2-chloroethyl) phosphate; TCEP] 0 to 50 parts by weight, diphenylchresylphosphate; DPK] 0 to 50 parts by weight, 0 to 10 parts by weight of red, 0 to 50 parts by weight of chlorinated paraffin, 0 to 30 parts by weight of ocher, and 120 to 290 parts by weight of the flame retardant. Parts by weight, foaming agent 10-40 parts by weight, foaming aid 0-2 parts by weight, internal mold release agent 0-10 parts by weight, external mold release agent 0-10 parts by weight, stabilizer 0-2.5 parts by weight, plasticizer 0-50 parts by weight, heat transfer accelerator It can manufacture by containing 0-5 weight part.

In particular, the preliminary experiments showed that W-PE as a waste resource has a molecular weight of about 5,000 ?? to 15,000, which is lower than that of the original pure PE, and W-EVA also has a value of 1/2 to 2/3 of the pure EVA molecular weight. It is just too low. Therefore, such W-PE, W-EVA can be made much easier crosslinking than a pure raw material and makes the foaming process easier. In addition, GTR as a waste resource can easily disperse in the matrix resin in the case of powder, which is the most stable crosslinked rubber, and has a good flame retardant effect, and in addition, it is easy to form char in the combustion state, thereby providing a heat insulating layer on the surface. It forms and blocks the combustion process to the inside.

In the present invention, the resin composition is a waste resource that is preferably used in view of economical efficiency and recycling, and typically W-PE, W-EVA, W-RUBBER, GTR, and optionally polyethylene (Virgin-PE), nitrile rubber (NBR), a blend of ethylene propylene copolymer (EPDM), and particularly preferably used in the present invention GTR (Ground tire rubber) is made of a powder by grinding waste tires, chemical stability of the air pollution material Given its low content, it can serve as a good filler for polyolefin blend materials, which is a crosslinked, high carbon black tire rubber with good toughness and a good UV resistance. Since the stability is high and the contained activated carbon is suitable for the grain reinforcement composite material, it may be appropriately blended. These components have a great influence on the mechanical properties of the composite according to the size of the particles, the larger the size may cause problems in the interface adhesion and most tensile properties are degraded, so it is preferable to use the powder state. Therefore, the present invention can be preferably used having a particle size of 0.5mm or less in consideration of this, but the size is not limited to the particle size.

For reference, the composition of the GTR used in the present invention is generally as shown in Table 1 below.

Analysis item PC ^a PC + LT ^b TB ^c Rubber powder Rubber powder Rubber powder Type of rubber polymer Compounding ratio ^d (%) NR 20 40 70 SBR 80 45 20 BR - 15 10 % Of rubber polymer Direct law 23.7 40.2 Indirect law 47.6 44.6 54.1 importance 1.16 1.15 1.14 Acetone Extract (%) 19.4 16.9 12.5 Chloroform Extract (%) 1.40 1.20 Alcoholic KOH Solution extract(%) 0.5 0.4 Sulfur content (%) 1.7 1.7 Organic sulfur ^e (%) 0.02 0.03 Inorganic sulfur (%) 0.5 Ash content (%) 3.1 4.2 3.8 Activated carbon ^f (%) 30.7 26.3 SiO ₂ (%) 0.5 0.4 TiO ₂ (%) 0.1 ZnO (%) 1.6 1.2 CaO (%) 1.6 0.4 Fe ₂ O ₃ + Al ₂ O ₃ (%) 0.3 0.1

In Table 1, a denotes a passenger car tire, b denotes a light truck tire, c denotes a truck or bus tire f, d denotes a value obtained by gas chromatography, e denotes a value of sodium sulfite method, and f denotes a value of nitrate analysis method. It is shown.

In the above component analysis, tires are mainly composed of natural rubber (NB), styrene-butadiene rubber (SBR) and butadiene rubber (BR), but according to the characteristics of tire parts The composition of the composition is determined as shown in the following Table 2 by analyzing the combination state of the car and truck.

division car truck Tread SBR-BR NR ^a -BR or SBR-BR belt NR NR Caucas NR-SBR-BR NR-BR Side wall (black) NR-SBR or NR-BR NR-BR Side wall (bag) NR-SBR-EPDM-IIR ^b - Lina NR-SBR or NR-SBR-IIR NR-IIR

In Table 2, a will include polyisoprene rubber (IR; polyisoprene rubber), b means butyl halide (IIR; isobutylene-isoprene rubber).

As described above, in the present invention, W-PE, W-EVA, W-RUBBER, GTR, and in some cases, PE, NBR, and EPDM are blended to be used as raw material resins, thereby treating waste. By treating this effectively, it improves various properties such as mechanical properties and chemical stability, and utilizes it as a foam material, which is a useful raw material, to seek environmental friendliness according to recycling. It can be. In addition, in this invention, the case where one component is used among seven components as said resin component is also included, The case where one or more seven components are used is used.

In the present invention, the flame retardant is maximized by using an inorganic flame retardant (Al (OH) ₃ ) and a phosphorus flame retardant without using a halogen flame retardant in consideration of environment and safety. In general, halogenated compounds have a flame retardant effect by fundamentally stabilizing radicals generated in the gas phase, and the mechanism is inferred by a chemical reaction as in Scheme 1 below.

HO · + HX ---> HOH + X

X · + RH ---> HX + R · Regeneration (Stop chain reaction)

XO · + · OH ---> HX + O ₂ (flame retardant effect by reducing the concentration of active O · and · OH and stopping the chain reaction)

X + O + M ---> XO + M

_{X 2 + O · ---> XO} · + X · ( during decomposition effect to block the non-flammable gas generating O ₂₎

O + OX ---> O ₂ + X

In the reaction scheme 1, activating radicals such as OH radicals generate heat through a chemical reaction, and the latent heat generated serves as an energy source required for combustion of surrounding flammable materials.

On the other hand, the flame retardant gives a flame retardant effect by reducing the concentration of active radicals O · and · OH and stopping the chain reaction as in the above mechanism, the cleavage of the CX bond during combustion is an endothermic reaction to reduce the heat of combustion of the combustible material have. It also has the effect of blocking oxygen by generating incombustible gases during decomposition. Therefore, the actual flame retardant effect is given by HX and reacts and is converted into X radical of low energy source. HX acts as an oxidation catalyst of the combustible material, and the oxidized material is ring-structured, resulting in char, a carbon compound. The carbon compound thus produced serves to help prevent the combustible material from below the combustion zone by blocking oxygen and latent heat.

In the present invention, the inorganic flame retardant is used to exclude the halogen type in consideration of human harmfulness as the flame retardant, and as the inorganic flame retardant, for example, aluminum hydroxide, antimony oxide, magnesium hydroxide and a boron-containing compound can be used. -205 (trade name), H-201 (trade name) and the like can be used. Unlike organic flame retardants, inorganic flame retardants are not volatilized by heat and decompose to release non-combustible gases such as H ₂ O, CO ₂ , SO ₂ , HCl and are mostly endothermic. In the gas phase, the flammable gas is diluted and the plastic surface is coated to prevent the access of oxygen. At the same time, there is an effect of reducing the generation of plastic cooling and pyrolysis water through the endothermic reaction on the solid phase surface. For example, aluminum hydroxide and magnesium hydroxide produce water after decomposition as shown in Scheme 2, where a large amount of endotherm is accompanied to impart flame retardancy.

2Al (OH) ₃ + heating ------> Al ₂ O ₃ + 3H ₂ O -298KJ / mol

Mg (OH) ₂ + heating ------> MgO + H ₂ O -328KJ / mol

In addition, antimony trioxide and antimony pentoxide may be used as antimony oxide, and it is used as an adjuvant that exhibits a flame retardant synergistic effect of a halogen-containing flame retardant without being used as such. The mechanism is inferred as follows. That is, SbCl ₃ generated in each step reaction of Scheme 3 has an effect of lowering the temperature of the plastic through endothermic reaction, and acts as a radical interceptor like HCl and HBr. Some have suggested that both SbCl ₃ and SbOCl have a flame retardant synergistic effect by lowering the rate of halogen release in the combustion zone, increasing the time to act as a radical interceptor.

In addition, the generated heavy gas surrounds the surface of the solid phase, thereby blocking oxygen access and thus exhibiting a flame retardant effect. This reaction mechanism can be summarized as in Scheme 3 below.

Sb ₂ O ₃ + 2HCl (~ 250 ° C) ----------> 2SbOCl + H ₂ O

5SCOCl (Maintain 245 ~ 280 ℃) ----------> Sb ₄ O ₅ Cl + SbCl ₃ ↑

4Sb ₄ O ₅ Cl ₂ (Maintain 410 ~ 475 ℃) ----------> 5Sb ₃ O ₄ Cl + SbCl ₃ ↑

3Sb ₃ O ₄ Cl (Maintain 475 ~ 565 ℃) ----------> 4Sb ₂ O ₃ + SbCl ₃ ↑

Sb ₂ O ₃ (S) (Maintain at 685 ℃) ----------> Sb ₂ O ₃ (I)

In addition, the phosphorus-based flame retardant can give a particularly excellent flame retardant effect on the polymer having a large number of hydroxyl groups. This mechanism is known because the phosphorus (P) compound added as in Scheme 4 promotes the dehydration reaction of the base polymer and crosslinking results in the formation of non-combustible carbonaceous char (condensed). -phase mechanism).

At this time, pyrophosphoric acid and metaphosphoric acid on the surface play a role of enhancing char formation through dehydration effect, and metaphosphate easily reacts. And because of the generated char, it is difficult for heat to penetrate inside the material, and thus a self insulating layer is generated. In addition, the water generated by the dehydration reaction has the effect of diluting the concentration of the flammable gas to enhance the flame retardant effect, and the amount of soot generated is significantly reduced by converting the generated carbonizable intermediate into char.

In addition, the present invention excludes the use of halogen-based flame retardant to prepare an environmentally friendly composition in consideration of the effect on the environmental surface and processability as a flame retardant, preferably Al (OH) ₃ , Mg (OH) ) _2, magnesium silicate, acid zinc (zinc Borate), zinc sulfate (zinc Sulfide), Sb ₂ O _3, Sb ₂ O _5, H-205 of the yellow earth, and phosphorus-based flame retardant (trade name), H-201 (trade name ), DPK (trade name), enemy, TCEP (trade name), TCPP (trade name), it is desirable to have an effect of improving the flame retardancy while considering the environmental aspects. The present invention includes all of the above 14 components as flame retardants, or one or more components selected from them.

Then, the yellow earth, which is preferably used in the present invention include kaolin mineral _{(Al 2 O 3 · 2SiO 2} · nH 2 O) and Montmorillonite _{(Al 2 O 3 · 4SiO 2} · 6H 2 O), fatigue fill light (Al ₂ including O ₃ · 4SiO refers to a component such as ₂ · H ₂ O), illite _{{KAl 2 (OH) 2 [} AlSi 3 (O, OH) 10]}, talc _{(3MgO · 4SiO 2 · H 2} O). These loess can act as absorbent because they can intercalate organic materials and have very high specific surface area of about 800 m ² / g or more and can be used as efficient filler due to high surface adsorption. .

The blowing agent used as an additive in the present invention is an organic chemical foaming agent, for example, azodicarbonamides (ADCA, AC-1000) or N, N'-dinitrosopentamethylenetetramine (N, N), which are azo compounds. ′ -Dinitrosopentamethylenetetramine (DPT) can preferably be used sodium bicarbonate (trade name kycerol-91) as an inorganic chemical foaming agent, and as a foaming aid to control foamability and temperature which will affect processability and productivity, The brand name Cellex-A) and ZnO can be used preferably as a heat transfer accelerator.

As the crosslinking agent used in the present invention, isopropylbenzene or dicumylperoxide (DCP) can be preferably used at an appropriate ratio as described above as a peroxide crosslinking agent.

As a stabilizer, a Ba-Zn-based stabilizer is used in consideration of the foaming rate and the effect of obtaining a uniform cell by using a large amount of filler. For example, the trade names BZ-806F and BZ-119 can be preferably used. have.

In addition, it is preferable to use diethylhexyl phthalate (DOP), paraffin oil (P3 ~ P6) and diphenylchresylphosphate (trade name DPK) in consideration of compatibility, processability and foamability with the plasticizer. In addition, the internal mold release agent is a polyethylene processing agent (LC-102N) and a processing aid (MMA based acrylic processing aid) as a rubber processing enhancer, stearic acid (Stearic Acid) is preferably used in consideration of the extrusion property as an external mold release agent.

The flame-retardant foam composition of the present invention prepared in such a composition can be prepared in a variety of molded articles by mixing, extrusion, compression or injection at 110 ~ 138 ℃ preferably for molding.

As described above, the method for producing a composition according to the present invention will be described as an example through each of the following examples, and the embodiment of the present invention is intended to illustrate the case of manufacture according to the intended use, but the present invention is limited. It is not intended that, in the examples, the percentage (%) indicating the content of the composition means weight ratio unless otherwise stated.

The abbreviation of the components used in this embodiment is W-PE is waste polyethylene, W-EVA is waste ethylene vinyl copolymer, W-RUBBER is waste rubber, GTR is waste tire rubber powder, and V-PE is polyethylene (Virgin-PE ), NBR means nitrile rubber and EPDM means ethylene propylene copolymer.

Example 1 Resin / Additive Blend [I]

The thermal and dynamic behaviors of the resin / additive blends with temperature, temperature and time were observed and examined in relation to flame retardancy and foamability (foaming rate, cell structure, surface condition, etc.). In particular, the resin is composed of W-PE, W-EVA, W-RUBBER, and GTR in consideration of economical and environmental friendliness.In some cases, a small amount of V-PE, NBR, EPDM is used, and the resin composition ratio, resin / flame retardant is used. The composition ratio of the, the type and content of the flame retardant, and the type and content of other additives were adjusted.

The composition ratio of the resin components is shown in the following Table 3, the blend is 110 ~ 138 ℃, RPM50, time 20-25 minutes in Rheomixer (HAAKE), and the extrusion is temperature 110 in Minimax Molder (Bau.915L) Foaming was performed at 120-210 degreeC in oven (Oven; HB-503M) within -138 degreeC, Rs5 and time 1-3 minutes. In addition, the foaming test investigated the surface condition, foaming rate, cell structure, etc. after foaming, and the flame retardancy test was a LOI (Atlas) test, and the specimen size was 6.5 +/- 0.5mm wide and 2.0 thick according to ASTM-D-2863. Limiting Oxygen Index (LOI) was measured by arbitrarily adjusting the injection amount of oxygen and nitrogen at +/- 0.25mm and length of 7.0 ~ 150mm, and morphology investigation was performed by electron microscope SEM (JEOL JSM-840A). The fracture surface of the specimen was observed.

As a result, in the case of Samples 1 to 7, the resin composition consisted only of waste resources (W-PE, W-EVA) and was intended to see flame retardancy and foaming properties. W-PE / W-EVA = 100 ~ When 0/0 to 100 wt%, foaming occurs at a temperature range of 140 to 195 ° C., and the time required is 25 to 30 minutes, the surface is smooth, and the cell structure is an open cell of Sample 3 using an inorganic chemical foaming agent. Except open-cell, all were uniform as closed-cells, and it was confirmed that they had a foaming rate of about 320 to 355% in the radial direction.

As a result of the LOI test, the marginal oxygen index was 28 to 35, which showed a considerably high value in terms of practicality, and thus, it was confirmed that the flame resistance was superior to the existing foam.

In the case of samples 8 to 13, the effect of PE (Virgin-PE) on foamability is to be examined. W-PE / W-EVA / V-PE = 90 to 50/90 to 50/10 to Foaming occurs at a temperature range of 140 to 193 ° C. at 50 wt%, the time required is 25 to 28 minutes, the surface is smooth, and the cell structure is sample 10, 11 using DPT and AC-1000 in organic chemical foaming agents. Except for semi-open cells, all of them were uniform as closed cells and were found to have a foaming rate of about 320-350% in the radial direction. Therefore, the foaming properties were similar compared to those consisting only of waste resources (W-PE, W-EVA). As a result, when the resin composition was composed of waste resources, it was confirmed that foamability was inferior to that of new materials.

In addition, the LOI test results showed that the marginal oxygen index was very high as 31 to 35, which also confirmed that the flame retardancy was superior to the existing foam.

In the case of Samples 14 to 16, when the composition of the resin is composed of only V-PE, as shown in Table 3, foaming and flame retardancy were intended to be observed. Foaming occurred at a temperature range of 130 to 175 ° C, and the time required was 30 minutes. It was confirmed that the surface was smooth, uniform as a closed cell, and had a foaming ratio of about 340 to 355% in the radial direction.

In addition, the LOI test results showed that the marginal oxygen index was very high as 37 to 38, which also confirmed that the flame retardancy was superior to the existing foam.

And comparing the change in the foaming ratio between the representative samples according to the composition ratio of the resin and each additive is as follows.

Samples 1, 4, and 7 are intended to see the change in flame retardancy and foamability as the amount of flame retardant is increased compared to resin, and as the amount of flame retardant is increased from resin (sample 1 to sample 7), the limit oxygen index increases to 28, 31, 33. However, the foaming rate was found to decrease slightly to 355%, 330%, 320% in the radial direction. This may be due to the relative increase in flame retardants relative to resin, that is, the decrease in the relative amount of resin.

Samples 2, 3, and 4 are intended to see the change in foamability and flame retardancy according to the resin composition ratio when the content of flame retardant to resin is the same. It was confirmed that there was a slight difference with 330%, but similar, and in case of Sample 3, it was confirmed that it had an open cell structure according to the use of the inorganic chemical foaming agent. Therefore, the resin composition is composed only of W-PE, but composed of W-EVA, but did not show any difference in the foaming rate, it was confirmed that all of them can be preferably used to obtain excellent foam in consideration of the foamability and flame retardancy.

Samples 12 and 13 were intended to see the change in flame retardancy and foamability according to the type of flame retardant when the content of the flame retardant was the same as that of the resin. It was confirmed that the limit oxygen index was 34 in Sample 12, which was higher than in Sample 13 33. In the case of Sample 13, the foaming rate was found to be 350% in the radial direction, rather than 330% of Sample 12. Therefore, the higher limit oxygen index of sample 12 is shown to be synergistic effect of the use of phosphorus-based flame retardant among flame retardants, and the low foaming rate is also considered to be due to the increase in viscosity of the blend according to the use of phosphorus-based flame retardant.

As a result, when the resin composition ratio is W-PE / W-EVA / V-PE = 0 to 100/0 to 100/0 to 100 Wt%, and the blend is 110 to 138 ° C under the processing conditions, The foaming rate is about 3 to 3.5 times in the radial direction, the surface is smooth, the cell structure is uniform, the elasticity is excellent with closed cell, semi-open cell and open cell, and the marginal oxygen index is 28 to 38. It was found that it is a desirable compounding and processing condition to obtain a very good foam.

In addition, the resin composition ratio, the composition ratio of the resin / flame retardant, and the flame retardancy and foaming rate according to the interaction of each additive were confirmed, and the resin composition ratio considering the interaction, the type and content of the additives (flame retardant, foaming agent and crosslinking agent, etc.) compared to the resin It was found to be an important factor influencing this flame retardancy and foamability (foam rate and cell structure).

Observation results for the above results are shown in Table 4 and accompanying drawings, Figure 1 (Sample 1), Figure 2 (Sample 4), Figure 3 (Sample 7), Figure 4 (Sample 8), and Figure 5 (Sample 11). 6 (sample 13) and 7 (sample 14).

Sample Number Composition One 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Suzy W-PE 100 90 70 50 30 10 0 90 70 50 W-EVA 0 10 30 50 70 90 100 90 70 50 W-RUBBER GTR V-PE 10 30 50 10 30 50 100 100 100 NBR EPDM Flame retardant Al (OH) ₃ 90 120 110 100 120 120 130 140 60 20 40 140 140 180 180 180 Mg (OH) ₂ 20 20 30 40 20 20 30 20 80 120 100 20 20 Magnesium silicate 5 Zinc borate Zinc sulfate Sb ₂ O ₃ 10 10 10 10 10 10 10 10 10 10 15 15 Sb ₂ O ₅ 10 10 10 10 H-201 5 5 10 5 H205 10 10 10 10 TCEP 10 10 50 TCPP 50 DPK 5 10 5 5 5 50 Of 5 Chlorinated Paraffin ocher 10 10 10 10 20 30 15 15 Crosslinking agent Perkadox 2 2.5 2.5 2.5 5 5 3.5 6 7 2.5 2.5 4 5 DCP 5 4 4 blowing agent Organic Chemical Foaming Agent ADCA 18 18 18 18 18 18 18 18 18 24 24 24 AC-1000 18 10 DPT 18 8 Inorganic Chemical Foaming Agent Kycerol-91 18 Foaming aid Urea system (Celex-A) One 2 1.5 Internal release agent PE-Wax 4 2.5 2.5 External release agent Stearic acid 5 5 5 stabilizator Ba-Zn system Plasticizer DOP Heat transfer accelerator ZnO 4 4 4 4 2 4 3 One 3 3 3

Classification Sample Number Foot Po Furtherance Limit Oxygen Index (LOI) Foaming temperature / time required (℃ / min) Foaming rate (%) surface Cell structure W-PE / W-EVA / W-R / G / V-PE / N / E (wt%) Flame Retardant / Others (PHR) One 140 → 193/25 355 smooth closed cell, uniform 100/0/0/0/0/0/0 120 / 24.0 28 2 〃 330 〃 〃 90/10/0/0/0/0/0 150 / 24.5 31 3 〃 325 〃 open cell, uniform 70/30/0/0/0/0/0 150 / 24.5 31 4 〃 330 〃 closed cell, uniform 50/50/0/0/0/0/0 150 / 24.5 31 5 140 → 195/30 320 〃 〃 30/70/0/0/0/0/0 165 / 25.0 30.5 6 140 → 190/27 325 〃 〃 10/90/0/0/0/0/0 180 / 23.0 33.5 7 140 → 193/25 320 〃 〃 0/100/0/0/0/0/0 195 / 21.5 33 8 140 → 190/27 330 〃 〃 90/0/0/0/10/0/0 200 / 25.0 35 9 〃 330 〃 〃 70/0/0/0/30/0/0 185 / 31.0 34 10 140 → 193/25 340 〃 semi-open cell, uniform 50/0/0/0/50/0/0 150 / 24.5 31 11 〃 320 〃 〃 0/90/0/0/10/0/0 150 / 20.5 32 12 140 → 190/28 330 〃 closed cell, uniform 0/70/0/0/30/0/0 195 / 26.5 34 13 140 → 193/25 350 〃 〃 0/50/0/0/50/0/0 195 / 24.0 33 14 130 → 175/30 355 〃 〃 0/0/0/0/100/0/0 270 / 41.0 37 15 〃 340 〃 〃 0/0/0/0/100/0/0 260 / 38.5 38 16 〃 340 〃 〃 0/0/0/0/100/0/0 260 / 38.5 38

In the table, the resin (W-P / W-E / W-R / G / V-P / N / E) means waste-PE / waste-EVA / waste-rubber / GTR / Virgin-PE / NBR / EPDM.

Example 2. Resin / Additive Blend [II]

As a result of Example 1, the cell structure was closed cell, semi-open cell and open in the range of resin composition ratio W-PE / W-EVA / V-PE = 0-100 / 0-100 / 0-100 Wt% The optimum composition and processing conditions for the uniformity of the cell, the foaming rate of about 300-350% in the radial direction, and the limiting oxygen index of 28-38 could be identified. Based on this, the W-RUBBER And GTR was added and the resin composition ratio, the composition ratio of the resin / flame retardant and the content of other additives were adjusted. Composition ratios related to these are shown in Table 5 below, and blend, extrusion and crosslinking / foaming, and flame retardancy, foamability and morphology investigation were performed in the same manner as in Example 1.

As a result, in the case of Samples 17 to 41, the resin composition was W-PE / W-EVA / W-RUBBER / GTR / V-PE / NBR / EPDM = 0 to 95/0 to 85/0 to When 30/0 to 40/0 to 10/0 to 30/0 to 50 wt%, foaming occurs at a temperature range of 140 to 193 ° C, and the time required is 22 to 30 minutes, the surface is smooth, and the cell structure Was uniform as closed cell and semi open cell, and it was confirmed that the foaming rate was about 300 to 330% in the radial direction. As a result of the LOI test, the marginal oxygen index showed a very high value of 31.5 to 40, indicating that the flame retardancy was superior to the existing foam.

And comparing the change in the foaming ratio between the representative samples according to the composition ratio of the resin and each additive is as follows.

For samples 17, 18, and 25, W-PE, W-EVA, and W-RUBBER were used as resins, and the change in flame retardancy and foamability according to the change of foamability and the composition of resin / flame retardant according to the change of W-RUBBER content As a result, it was confirmed that the marginal oxygen index decreased to 37, 35, and 31.5 as the content of the flame retardant to the resin decreased (sample 17 → 18 → 25). However, the foaming rate was found to be equal to 310% in samples 17 and 18 in the radial direction, and increased to 330% in sample 25. This may be due to the relative increase in flame retardants relative to resin, that is, the decrease in the relative amount of resin. Therefore, it was confirmed that the foaming ratio of the W-RUBBER content within 30 wt% has a good foamability of more than 300%.

For samples 29, 30, and 31, when the content of the flame retardant was the same as that of the resin, we wanted to see the change in the flame retardancy and the foamability according to the type of the flame retardant and the foaming agent. The marginal oxygen index was found to be 34, 36, 36.5, which is considered to be a synergistic effect due to the relative increase of H-201 (trade name) among the phosphorus flame retardants. In the case of Sample 31 using AC-1000 and DPT in the organic chemical foaming agent, it was confirmed that it had a semi-open cell as in Example 1.

For samples 19, 20, and 26, we wanted to see the foamability and flame retardancy according to the change of GTR content and the amount of flame retardant to resin, and the foaming rate was 300%, 310%, and 330%. It was confirmed that. Therefore, the samples 19 and 20 showed the difference in the foaming rate and the limit oxygen index even though the content of the flame retardant compared to the resin was the same, which was due to the difference in the type and content of the flame retardant, and in the case of sample 26, 20 Although the difference in the marginal oxygen index is not large despite the relatively small amount of flame retardant compared to that of the resin, this is also due to the difference in the type and content of the flame retardant, that is, DPK ( ) Is a simple example of the role of plasticizers rather than flame retardants. And it was confirmed that a good foam of more than 300% of the foaming rate can be obtained in the range of 40 wt% GTR.

In the case of samples 29 to 36, the content of VTR is 0 to 10 wt%, NBR 0 to 10 wt%, EPDM 0 to 10 wt% in order to use the GTR content of 30 wt% or more and to observe the change in flame retardancy and foamability. It was confirmed that the foaming ratio was good at 300 to 305%, and the marginal oxygen index was very high at 33 to 37.

For samples 37 and 38, we wanted to see the change in flame retardancy and foaming properties of the flame retardant compared to resin and the amount of other additives. The limit oxygen index was 37.5 for sample 38, which is much higher than 33 for sample 37. It was confirmed that the foaming rate is similar to that of Sample 38, 300%, and Sample 37, 305%. Therefore, in case of sample 37, which is slightly lower in flame retardant content than resin, the limiting oxygen index is much lower than that of sample 38.

From the above test results, the composition ratio of resin is W-PE / W-EVA / W-RUBBER / GTR / V-PE / NBR / EPDM = 0 to 95/0 to 85/0 to 30/0 to 40/0 to 10 / 0 to 30/0 to 50 wt% and when the blend is 110 to 138 ° C under the processing conditions, the foaming rate is about 3 to 3.3 times in the radial direction, and the surface is smooth and the cell structure is closed. It was found that it is a desirable compounding and processing condition to obtain a foam having excellent uniformity and elastic modulus as an open cell, and a limiting oxygen index of 31.5 to 40 with excellent flame retardancy and foamability.

In addition, the resin composition ratio, the composition ratio of the resin / flame retardant, and the flame retardancy and foaming rate according to the interaction of each additive were confirmed, and the resin composition ratio considering the interaction, the type and content of the additives (flame retardant, foaming agent and crosslinking agent, etc.) compared to the resin It was found to be an important factor influencing this flame retardancy and foamability (foam rate and cell structure).

In addition, the observation results for the above results are shown in Table 6 and accompanying drawings, Figure 8 (Sample 15), Figure 9 (Sample 17), Figure 10 (Sample 23), Figure 11 (Sample 28), Figure 12 (Sample 29). 13 (Sample 32), 14 (Sample 38), 15 (Sample 39), and 16 (Sample 40), the cell structure and the degree of dispersion of the known flame retardant polyolefin foam for comparison. Is shown in Figure 17 (Young.).

Sample Number Composition 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Suzy W-PE 95 80 90 60 85 75 60 60 65 W-EVA 70 60 85 60 65 W-RUBBER 5 20 5 5 20 10 30 5 10 GTR 10 40 10 20 20 30 40 10 30 30 30 V-PE 5 5 NBR EPDM Flame retardant Al (OH) ₃ 150 180 120 120 120 120 100 100 120 110 100 100 120 120 Mg (OH) ₂ 50 20 20 20 20 20 20 20 20 20 20 20 20 20 Magnesium silicate 10 Zinc borate 5 10 30 50 10 Zinc sulfate Sb ₂ O ₃ 10 10 10 10 10 10 10 10 Sb ₂ O ₅ 10 10 10 10 10 H-201 30 50 10 5 10 10 10 H205 30 50 5 5 10 10 TCEP 30 10 TCPP 30 DPK 10 10 10 10 10 20 5 10 5 10 10 10 10 Of 10 10 10 10 10 Chlorinated Paraffin 30 30 ocher 30 10 10 10 10 10 20 10 Crosslinking agent Perkadox 4 7 5 6 3.5 5 5 5 4 5 7 5 5 5 blowing agent Organic Chemical Foaming Agent ADCA 18 18 18 18 18 18 18 18 18 18 18 18 18 AC-1000 DPT Inorganic Chemical Foaming Agent Kycerol-91 18 Foaming aid Urea system (Celex-A) One One One One One 1.5 One 1.5 Internal release agent PE-Wax 5 10 4 External release agent Stearic acid 4 10 stabilizator Ba-Zn system One One One 2.5 One 2.5 Plasticizer DOP 5 5 Heat transfer accelerator ZnO 4 2 5 One 2.5 2.5 2 3 One 1.5 3 2

Sample Number Composition 31 32 33 34 35 36 37 38 39 40 41 Suzy W-PE 50 50 50 60 30 20 30 40 W-EVA 40 50 50 30 30 20 40 40 W-RUBBER 10 10 10 GTR 40 40 40 40 45 40 10 10 10 V-PE 5 10 NBR 5 10 10 10 30 EPDM 5 10 10 50 20 Flame retardant Al (OH) ₃ 90 120 100 80 90 80 240 180 190 250 200 Mg (OH) ₂ 50 20 40 60 50 60 Magnesium silicate 20 Zinc borate 10 10 10 Zinc sulfate 50 Sb ₂ O ₃ 10 10 10 10 10 10 10 30 10 10 Sb ₂ O ₅ 30 H-201 20 20 5 5 20 5 H205 10 10 10 TCEP 5 10 10 5 TCPP DPK 5 5 5 5 5 5 40 30 20 Of 10 Chlorinated Paraffin 50 ocher 20 20 10 10 20 10 10 Crosslinking agent Perkadox 6 7 5 4 6 4 21 22 22 25 23 blowing agent Organic Chemical Foaming Agent ADCA 18 18 18 18 18 24 32 40 24 24 AC-1000 10 DPT 8 Inorganic Chemical Foaming Agent Kycerol-91 Foaming aid Urea system (Celex-A) One Internal release agent PE-Wax 5 One 5 5 5 5 External release agent Stearic acid 5 2.5 5 5 5 5 stabilizator Ba-Zn system 1.5 2 2 2.5 1.5 2.5 Plasticizer DOP 5 5 10 10 5 10 50 Heat transfer accelerator ZnO One One 2 4 One 4 3 4 4 3 4

Sample number Foot Po Furtherance Limit Oxygen Index (LOI) Foaming temperature / time required (℃ / min) Foaming rate (%) surface Cell structure W-P / W-E / W-R / G / V-P / N / E (wt%) Flame Retardant / Others (PHR) 17 140 → 190/30 310 smooth closed cell, uniform 95/0/5/0/0/0/0 230 / 36.0 37 18 140 → 193/28 310 〃 〃 80/0/20/0/0/0/0 220 / 26.0 35 19 〃 300 〃 〃 90/0/0/10/0/0/0 230 / 26.0 37 20 〃 310 〃 〃 60/0/0/40/0/0/0 230 / 24.0 36 21 140 → 185/22 300 〃 〃 85/0/5/10/0/0/0 230 / 37.5 37 22 140 → 190/25 300 〃 〃 75/0/5/20/0/0/0 230 / 38.0 37.5 23 〃 320 〃 〃 60/0/20/20/0/0/0 185 / 27.5 33 24 〃 315 〃 〃 60/0/10/30/0/0/0 185 / 27.5 33 25 〃 330 〃 〃 0/70/30/0/0/0/0 165 / 24.0 31.5 26 〃 330 〃 〃 0/60/0/40/0/0/0 165 / 33.5 33 27 〃 320 〃 〃 0/85/5/10/0/0/0 190 / 27.5 33 28 〃 315 〃 〃 0/60/10/30/0/0/0 190 / 25.5 33 29 〃 300 〃 〃 65/0/0/30/5/0/0 210 / 34.5 34 30 〃 300 〃 〃 0/65/0/30/5/0/0 210 / 26.5 36 31 〃 305 〃 semi-open cell, uniform 50/0/0/40/5/5/0 210 / 31.5 36.5 32 〃 305 〃 closed cell, uniform 0/40/0/40/10/10/0 215 / 34.0 37 33 〃 300 〃 〃 50/0/0/40/0/10/0 200 / 37.0 34.5 34 140 → 187/30 300 〃 〃 0/50/0/40/0/10/0 180 / 38.5 33 35 140 → 185/30 300 〃 〃 50/0/0/45/0/0/5 210 / 41.5 36 36 140 → 185/30 300 〃 〃 0/50/0/40/0/0/10 180 / 38.5 33 37 140 → 175/30 305 〃 〃 60/30/10/0/0/0/10 260 / 101.5 33 38 〃 300 〃 〃 30/30/0/10/0/30/0 270 / 68.0 37.5 39 〃 300 〃 〃 20/20/0/10/0/0/50 270 / 76.0 37 40 〃 310 〃 〃 30/40/10/0/0/0/20 290 / 62.0 40 41 〃 305 〃 〃 40/40/10/10/0/0/0 280 / 61.0 39.5

In the table, the resin (W-P / W-E / W-R / G / V-P / N / E) means waste-PE / waste-EVA / waste-rubber / GTR / Virgin-PE / NBR / EPDM.

As described above, the present invention is a waste plastic polyethylene (W-PE), waste ethylene vinyl copolymer (W-EVA), waste rubber (W-RUBBER) or waste tire rubber powder (GTR; tire rubber) and optionally a small amount of polyethylene (PE), nitrile rubber (NBR), ethylene propylene copolymer (EPDM), and a mixture of inorganic and phosphorus flame retardants, foaming agents, crosslinking agents and other additives. As a result, the resulting flame-retardant foam composition, which seeks to recycle waste resources such as W-PE, W-EVA, W-RUBBER and GTR in a highly efficient manner, has excellent environmental friendliness, stability and economy and mechanical properties, and particularly because this kind of excellent properties, the effect can be very useful for a wide range of fields such as various types of construction materials and auto parts, sports goods and other industrial products by extrusion, compression molding or injection It is.

Claims (6)

In a flame-retardant foam composition containing waste plastic, waste rubber and waste tire rubber powder, and containing at least one of a flame retardant, a crosslinking agent, a foaming agent, a lubricant, a plasticizer and a stabilizer as conventional additives, the resin component is waste polyethylene (W- PE) 0-100% by weight, 0-100% by weight of waste ethylene vinyl copolymer (W-EVA), 0-30% by weight of waste rubber (W-RUBBER), 0-40% by weight of waste tire rubber (GTR), It consists of 0-100 weight% of polyethylene (PE), 0-30 weight% of nitrile rubber (NBR), and 0-50 weight% of ethylene propylene copolymers, and it is Al (OH) _{3 as a} flame retardant with respect to 100 weight part of said resin components. 20 to 250 parts by weight, Mg (OH) ₂ 20 to 120 parts by weight, magnesium silicate 0 to 20 parts by weight, zinc boronic acid 0 to 50 parts by weight, zinc sulfate 0 to 50 parts by weight, Sb ₂ O ₃ 0 to 30 parts by weight Parts, Sb ₂ O ₅ 0-30 parts by weight, 3- (hydroxyphenylphosphinyl) propanoic acid or 9,10-dihydro-9-oxa-10- [2 , 0-50 parts by weight of 3-di- (hydroxyethoxy) carbonylpropyl] -10-phosphaphenanthrene-10-oxide, tris (chloroisopropyl) phosphate (TCPP), or tris (2-chloroethyl 0 to 50 parts by weight of phosphate (TCEP), 0 to 50 parts by weight of diphenylcresyl phosphate, 0 to 10 parts by weight of red, 0 to 50 parts by weight of chlorinated paraffin, 0 to 30 parts by weight of ocher, and the flame retardant 120 A flame retardant foam composition using waste resources, which is contained in an amount of 290 parts by weight and which contains a conventional additive. The additive according to claim 1, wherein the additive is 2 to 25 parts by weight of crosslinking agent, 10 to 40 parts by weight of foaming agent, 0 to 2 parts by weight of foaming aid, 0 to 10 parts by weight of internal mold release agent, 0 to 10 parts by weight of external mold release agent, and stabilizer 0. At least any one or more of -2.5 parts by weight, 0 to 50 parts by weight of plasticizer, and 0 to 5 parts by weight of heat transfer accelerator is additionally included. The flame retardant foam composition according to claim 1 or 2, wherein the waste polyethylene resin has a melting point of 100 to 130 ° C and the waste ethylene vinyl copolymer has a vinyl acetate content of 10 to 50%. The flame retardant foam composition according to claim 1 or 2, wherein the nitrile rubber has an acrylonitrile content of 28 to 34% by weight. The flame retardant foam composition according to claim 1 or 2, wherein the ethylene-propylene copolymer has an ENB content of 4.5 to 8% by weight. A flame retardant foam composition using waste resources, characterized in that the composition of claim 1 or 2 is mixed by extrusion, compression or injection at 110 ~ 138 ℃.