KR20100073148A - Flame retardant thermoplastic resin composition - Google Patents

Abstract

PURPOSE: A flame retardant thermoplastic resin composition is provided to secure the stability for the fire by using a brominated diphenyl ethanol compound, and to improve the commercial availability and the heat resistance of the composition. CONSTITUTION: A flame retardant thermoplastic resin composition contains the following: 20~90 parts of rubber-reinforced polystyrene resin by weight; 10~80 parts of polyphenylene oxide resin by weight; and 0.01~30 parts of brominated diphenyl ethanol compound by weight. The rubber-reinforced polystyrene resin is a polymer containing 1~30wt% of rubber elastomer, and 70~99wt% of aromatic vinyl monomer. The polyphenylene oxide resin is poly(2,6-dimethyl,1,4-phenylene)ether.

Description

Flame Retardant Thermoplastic Resin Composition

Field of invention

The present invention relates to a flame retardant thermoplastic resin composition. More specifically, the present invention relates to a flame retardant thermoplastic resin composition having excellent flame retardancy and improved mechanical strength and processability by applying a brominated diphenyl ethane mixture to a base resin including a rubber-reinforced polystyrene resin and a polyphenylene oxide resin.

Background of the Invention

Generally, polyphenylene oxide resin has excellent heat resistance and mechanical strength, and has excellent numerical stability of the product during processing. However, it is difficult to process alone, and it is usually blended with polystyrene resin having good compatibility to be an interior and exterior material of electronic products. It is used.

However, the blend of polyphenylene oxide resin and polystyrene resin improves processability while reducing impact strength, thereby compensating for the disadvantage of lowering impact strength by applying rubber-reinforced polystyrene resin including rubber to compensate for this. However, since such a resin composition is easily burned, flame retardance should be imparted to the resin for use in electrical, electronic products or office equipment that generate heat during use such as a monitor or a fax machine.

In general, there is a method of applying or mixing the flame retardant as a method of imparting flame retardancy to the resin. The flame retardant is divided into halogen-based and non-halogen-based flame retardants, and represents a halogen-based flame retardant is bromine and chlorine. Chlorine-based flame retardants are undesirable because they can corrode equipment used in the manufacture of products. Bromine-based flame retardants are limited in their use due to the environmental regulations of some compounds. To avoid these limitations, many non-halogen flame retardants have been proposed, and the commercialization of resins using them is active, but the flame retardant performance of polyphenylene oxide resins and rubber-reinforced polystyrene resins composed of non-halogen flame retardants is difficult to meet strict flame resistance standards and heat resistance. Difficult to secure Therefore, it is necessary to introduce a halogen-based flame retardant to meet the heat and flame resistance desired by the user at the same time. Examples of the halogen flame retardant include decabromodiphenyl ether, decabromodiphenyl oxide, decabromodiphenylethane, tetrabromobisphenol A, brominated epoxy oligomer, hexabromocyclododecane, 2,4,6-tris (2 , 4,6-tribromophenoxy) -1,3,5 triazine and the like are mainly used.

However, TBBPA (2,2 ', 6,6' -Tetrabromo-4,4'-isopropylidenediphenol), which is a commonly used additive flame retardant, has been environmentally problematic and has been reduced in use. There is a disadvantage that a defect occurs due to temperature. An environmentally friendly bromine-based flame retardant is DecaBromoDiPhenylEthane (DBDPE). However, DBDPE has a very high melting point, and has a disadvantage in that it is difficult to use in a HIPS / PPO blend due to a decrease in compatibility with a resin. That is, when manufactured from flame retardant resins, the impact strength is greatly reduced, and the flowability is also reduced due to its characteristics. In addition, 2,4,6-tris (2,4,6-tribromophenoxy) -1,3,5 triazine is not preferable from an environmental point of view because it is prepared using Tri-Bromophenol.

Accordingly, the present inventors have applied a brominated diphenylethane mixture to a base resin including a rubber-reinforced polystyrene resin and a polyphenylene oxide resin to develop a flame retardant thermoplastic resin composition having excellent flame retardancy and improved mechanical strength and processability. .

An object of the present invention is to provide a flame retardant thermoplastic resin composition that is stable against fire.

Another object of the present invention is to provide a flame retardant thermoplastic resin composition having excellent balance of impact resistance and fluidity by applying a compatible flame retardant.

It is another object of the present invention to provide a flame retardant thermoplastic resin composition which can achieve V-0 flame retardancy even with a low flame retardant content.

Still another object of the present invention is to provide a flame retardant thermoplastic resin composition having excellent physical property balance such as heat resistance and workability.

The above and other objects of the present invention can be achieved by the present invention described below.

Summary of the Invention

The present invention relates to a flame retardant thermoplastic resin composition. The resin composition is (A) 20 to 90 parts by weight of rubber-reinforced polystyrene resin; (C) 0.01-30 weight part of (C) brominated diphenylethane mixtures with respect to 100 weight part of base resin which consists of 10-80 weight part of polyphenylene oxide resins.

In an embodiment, the resin composition may include (A) 55 to 90 parts by weight of rubber-reinforced polystyrene resin; (B) 5-25 weight part of (C) brominated diphenylethane mixtures with respect to 100 weight part of base resin which consists of 10-45 weight part of polyphenylene oxide resins.

In a specific embodiment, the brominated diphenylethane mixture (C) is prepared by brominating diphenylethane, and the hexabromodiphenyl ethane content is 5 to 85 wt% in the total brominated diphenylethane mixture, and heptabromody The content of phenylethane in an amount of 0 to 30% by weight.

 In another embodiment, the brominated diphenylethane mixture (C) comprises a hexabromodiphenylethane content of 55 to 85 wt% in the total brominated diphenyl ethane mixture, and an odd number of bromine-substituted compounds in diphenylethane 1 It is included by -25 weight%.

The resin composition may further include antimony oxide.

The resin composition of the present invention is a plasticizer, flame retardant, flame retardant aid, anti-drip agent, heat stabilizer, mold release agent, weather stabilizer, halogen stabilizer, lubricant, filler, coupling agent, light stabilizer, antioxidant, colorant, antistatic agent, dispersant and impact modifier, etc. It may further include an additive.

Hereinafter, the content of the present invention will be described in detail below.

Detailed Description of the Invention

(A) Rubber reinforced polystyrene resin

The rubber-reinforced polystyrene resin of the present invention is prepared by polymerizing a rubbery polymer and an aromatic vinyl monomer.

The rubbery polymers include butadiene type rubbers, copolymers of butadiene and styrene, diene rubbers such as poly (acrylonitrile-butadiene) and saturated rubbers hydrogenated with the diene rubber, isoprene rubber, acrylic rubber and ethylene-propylene- Diene monomer terpolymer (EPDM) and the like can be used. Preferably, polybutadiene, a copolymer of butadiene and styrene, isoprene rubber, alkyl acrylate rubbers and the like are used. The content of the rubbery polymer may be 1 to 30% by weight, preferably 5 to 15% by weight of the total weight of the rubber-reinforced polystyrene resin.

In the blend of rubber-reinforced polystyrene resin and polyphenylene oxide resin, the particle size of rubber phase is 0.1-6.0 μm in Z-average, and the particle size of rubber phase is 0.25-Z in average in order to give desirable physical properties. It is preferable that it is 3.5 micrometers.

In the specific example, the rubber-reinforced polystyrene resin may be used in which rubber is dispersed in bimodal or trimodal form. In one embodiment, the rubber-reinforced polystyrene resin (A) may be a mixture of a rubber-reinforced polystyrene resin having an average rubber particle size of 0.1 to 1 μm and a rubber-reinforced polystyrene resin having an average rubber particle size of 1 to 6 μm.

As the aromatic vinyl monomer, styrene, α-methylstyrene, β-methylstyrene, p-methylstyrene, para t-butylstyrene, ethyl styrene, or the like may be used. The aromatic vinyl monomer is 70 to 99% by weight, preferably 85 to 97% by weight of the total weight of the rubber-reinforced polystyrene resin.

Rubber-reinforced polystyrene resin (A) of the present invention by adding a monomer such as acrylonitrile, acrylic acid, methacrylic acid, maleic anhydride, N-substituted maleimide in order to impart properties such as chemical resistance, processability, heat resistance at the time of manufacture It can polymerize. The amount to be added may be added up to 40% by weight based on the entire rubber-reinforced polystyrene resin.

The rubber-reinforced polystyrene resin may be polymerized by thermal polymerization without the presence of an initiator or may also be polymerized in the presence of an initiator. Polymerization initiators that can be used include at least one selected from peroxide initiators such as benzoyl peroxide, t-butyl hydroperoxide, acetyl peroxide, cumenehydro peroxide and azo initiators such as azobis isobutyronitrile. May be, but is not necessarily limited thereto.

The rubber-reinforced polystyrene resin (A) may be prepared using a bulk polymerization, suspension polymerization, emulsion polymerization or a mixture thereof, and among these polymerization methods, a bulk polymerization method may be preferably used.

(B) polyphenylene oxide resin

Since the resin composition which concerns on this invention lacks flame retardance only by the said rubber reinforced polystyrene resin (A), and heat resistance falls, it is used as a base resin by adding polyphenylene oxide resin (B).

Examples of the polyphenylene oxide resin include poly (2,6-dimethyl-1,4-phenylene) ether, poly (2,6-diethyl-1,4-phenylene) ether, poly (2,6-di Propyl-1,4-phenylene) ether, poly (2-methyl-6-ethyl-1,4-phenylene) ether, poly (2-methyl-6-propyl-1,4-phenylene) ether, poly (2-ethyl-6-propyl-1,4-phenylene) ether, poly (2,6-diphenyl-1,4-phenylene) ether, poly (2,6-dimethyl-1,4-phenylene ) Copolymer of poly (2,3,6-trimethyl-1,4-phenylene) ether and poly (2,6-dimethyl-1,4-phenylene) ether and poly (2,3,5) Copolymers of -triethyl-1,4-phenylene) ether and the like, and mixtures thereof can also be applied. Preferably a copolymer of poly (2,6-dimethyl-1,4-phenylene) ether and poly (2,3,6-trimethyl-1,4-phenylene) ether and poly (2,6-dimethyl- 1,4-phenylene) ether is used, of which poly (2,6-dimethyl-1,4-phenylene) ether is most preferred.

Although the degree of polymerization of the polyphenylene oxide resin (B) in the present invention is not particularly limited, the intrinsic viscosity measured in a chloroform solvent at 25 ° C. is preferably 0.2 to 0.8 in consideration of thermal stability and workability of the resin composition.

In the present invention, the polyphenylene oxide resin (B) is used in the range of 10 to 80% by weight in the base resin. When used at less than 10% by weight, sufficient heat resistance may not be obtained, and when it exceeds 80% by weight, workability may decrease.

(C) brominated diphenylethane mixture

The brominated diphenylethane mixture (C) of the present invention is a mixture produced by brominating diphenylethane and proceeds with the reaction of adding 5-9 Br to diphenylethane, and then recovering brominated diphenylethane from the reactant. The reaction product obtained through. The brominated diphenylethane mixture (C) comprises 5 to 85% by weight of hexabromodiphenylethane in the total brominated diphenylethane mixture, and contains 0 to 30% by weight of heptabromodiphenylethane. It is characterized by.

In one embodiment, the brominated diphenyl ethane mixture may be prepared by adding bromine to a reactor filled with diphenylethane, a solvent, and a catalyst and reacting for 0.5 to 24 hours by maintaining the reactor temperature at -20 to 35 ° C. Examples of the catalyst include metals such as aluminum and antimony, bromide or chlorides of metals, or mixtures thereof. Examples thereof include Al, AlCl3, Sb, SbCl3, SbCl5, SbBr3, SbClBr4, SbBrCl4, Fe, FeCl3, FeBr3, Ti, TiCl4, TiBr4, Sn, SnCl2, SnBr3, SnCl4, AlBr3, Be, BeCl2, Cd, CdCl2 Zn, ZnCl 2, B, BF 4, BCl 3, BBr 3, BiCl 3, Zr, ZrCl 4, and the like may be used, and may be used in an amount of 0.01 to 3 moles per mole of diphenylethane.

The injection ratio of bromine may be 5-10 mol, preferably 6.0-8 mol, most preferably 6.2-7.7 mol per mol of diphenylethane so that 5 to 8.5 hydrogens in diphenylethane are replaced with Br. .

In embodiments, the brominated diphenyl ethane mixture may be a mixture of hexabromodiphenylethane, heptabromodiphenylethane and octabromodiphenylethane. Or a mixture of tetrabromodiphenylethane, pentabromodiphenylethane and hexabromodiphenylethane.

Other embodiments may further include pentabromodiphenylethane, nonabromodiphenylethane, decabromodiphenylethane, and low molecular weight hydrocarbons. The low molecular weight hydrocarbon may include monobromodiphenylethane, dibromodiphenylethane, tribromodiphenylethane or tetrabromodiphenylethane.

The brominated diphenyl ethane mixture contains 0 to 30% by weight, preferably 0.01 to 20% by weight, more preferably 0.01 to 17% by weight, based on the area ratio of the GC / MS analysis. can do. In addition, the content of hexabromodiphenylethane may be 5 to 85% by weight, preferably 10 to 85% by weight, more preferably 55 to 85% by weight.

In an embodiment, the brominated diphenylethane mixture (C) may include hexabromodiphenylethane in an amount of 55 to 85 wt% in the total brominated diphenylethane mixture, and a bromine-substituted compound may be substituted in an odd number of diphenylethanes. It may comprise from 25% by weight. An odd number of bromine-substituted compounds in diphenylethane is pentabromodiphenylethane, heptabromodiphenylethane, nonabromodiphenylethane or a mixture of two or more thereof.

In one embodiment, based on the area ratio of the GC / MS analysis, the brominated diphenyl ethane mixture is 0-2 wt% of pentabromodiphenylethane, 55-85 wt% of hexabromodiphenylethane, and heptabromodiphenylethane 1 20 wt%, 1-25 wt% octabromodiphenylethane, 0-10 wt% nonabromodiphenylethane and 0-5 wt% decabromodiphenylethane.

In another embodiment the brominated diphenylethane mixture is 5-15 wt% pentabromodiphenylethane, 72-85 wt% hexabromodiphenylethane, 2-10 wt% heptaromodiphenylethane and octabromodiphenylethane It may comprise 0.1 to 3% by weight.

In another embodiment the brominated diphenylethane mixture comprises 55-75 wt% hexabromodiphenylethane, 11-16 wt% heptaromodiphenylethane, 10-20 wt% octabromodiphenylethane and nonabromodiphenylethane 1 to 9% by weight.

In another embodiment, the brominated diphenylethane mixture is 0.1 to 3% by weight pentabromodiphenylethane, 55 to 83% by weight hexabromodiphenylethane, 7 to 15% by weight heptabromodiphenylethane, octabromodiphenyl 5 to 20 weight percent ethane and 1 to 7 weight percent nonabromodiphenylethane.

In another embodiment, the brominated diphenylethane mixture is 0.1 to 3% by weight pentabromodiphenylethane, 55 to 83% by weight hexabromodiphenylethane, 7 to 15% by weight heptabromodiphenylethane, octabromodiphenyl 5 to 20 weight percent ethane, 1 to 7 weight percent nonabromodiphenylethane and 0.01 to 1 weight percent decabromodiphenylethane.

In another embodiment the brominated diphenylethane mixture is 55-83 wt% hexabromodiphenylethane, 7-17 wt% heptaromodiphenylethane, 5-23 wt% octabromodiphenylethane, nonabromodiphenyl 1-7 wt% ethane and 0.01-1 wt% decabromodiphenylethane.

In the present invention, the brominated diphenylethane mixture (C) may be used in an amount of 0.01 to 30 parts by weight based on 100 parts by weight of the base resin. When used in less than 0.01 parts by weight, sufficient flame retardancy may not be obtained, and when used in excess of 30 parts by weight, fluidity may decrease. Preferably it is 5-25 weight part with respect to 100 weight part of base resins, More preferably, it may be used in 10-20 weight part.

The resin composition of the present invention, if necessary, plasticizers, flame retardants, flame retardant aids, anti-dripping agents, heat stabilizers, mold release agents, weather stabilizers, halogen stabilizers, lubricants, fillers, coupling agents, light stabilizers, antioxidants, colorants, antistatic agents, dispersants and It may further include additives such as impact modifiers. These can be used individually or in mixture of 2 or more types.

As the flame retardant, other halogen-based flame retardants or phosphorus-based flame retardants may be used in combination. The halogen flame retardant may be a bromine flame retardant. Examples of the brominated flame retardant include tetrabromo bisphenol A, decabromo diphenyloxide, decabrominated di-phenylethane, 1,2-bis (tribromophenyl) ethane and a weight average molecular weight of 600 to 8000 g / mol brominated epoxy oligomers, octabromo trimethylphenyl indane, bis (2,3-dibromopropyl ether), tris (tribromophenyl) triazine, brominated aliphatic and aromatic hydrocarbons and the like can be used. These may be used alone or in mixture of two or more thereof.

Antimony oxide may be used as the flame retardant adjuvant. As the antimony oxide, antimony trioxide, antimony pentoxide, and mixtures thereof may be used. Among these, antimony trioxide is preferable. In the case of antimony trioxide, 50% particle size is appropriately 0.01 to 6 µm, more preferably 0.02 to 3.0 µm. In the case of antimony pentoxide, the particle size is appropriately 0.01 to 1.0 μm, more preferably 0.02 to 0.5 μm. Antimony oxide in the present invention may be used in 1 to 10 parts by weight based on 100 parts by weight of the base resin. It is not preferable to use the antimony oxide in excess of 10 parts by weight because it may impair the physical balance of the resin. More preferably, antimony oxide (D) can be used in 1-7 weight part or 2-5 weight part.

After the resin composition of the present invention is mixed with the above components and other additives simultaneously, it can be melt-extruded in an extruder and prepared in pellet form. The prepared pellets may be manufactured into various molded articles through various molding methods such as injection molding, extrusion molding, vacuum molding, and casting molding.

Another aspect of the present invention provides a molded article molded of the resin composition. The molded article is excellent in impact resistance, fluidity, flame retardancy, etc. can be widely applied to parts, exterior materials, automobile parts, sundries, structural materials of electrical and electronic products.

The invention can be better understood through the following examples, which are intended for purposes of illustration of the invention and are not intended to limit the scope of protection defined by the appended claims.

Example

Specifications of each component used in the following Examples and Comparative Examples are as follows.

(A) Rubber-reinforced polystyrene resin: HIPS resin (HG-1760S) of Cheil Industries was used.

(B) Polyphenylene Ether (PPE) Resin: Poly (2,6-dimethyl-phenylether) (trade name: S-202) of Asahi Kasehi, Japan, was used.

(C) brominated diphenylethane mixture

A brominated diphenylethane mixture was used to which 5 to 9 equivalents of Br was added so that hydrogen in diphenylethane was replaced with Br. Compositional analysis using GC / MS of the synthesized brominated diphenylethane mixture was performed by diluting a given sample in Toluene with Dilution Factor = 2000 (0.5mg / mL) and completely dissolving 1 mL in GC vial. Agilent 7683 injector, Agilent 7890N Gas Chromatography, and Agilent 5975C Mass Spectroscopy Detector were used. Inlet temperature is 320 ℃, split ratio is splitless, column is UA-1, column flow is 1.0ml / min, and oven temperature program is 40 ℃ (2min)-40 ℃ / min → 200 ℃-10 ℃ / min → 260 ℃-20 ℃ / min → 340 ℃ (2min) and MS interface temperature was set to 280 ℃. Qualitative analysis was performed by injecting 1 μl into GC / MSD using an autosampler. Each measured composition was used as area reference. The composition in the brominated diphenylethane mixture is shown in Table 1 below.

C1 ~ C10: Refer to Table 1

C11: decabromodiphenylethane, Saytex-8010 from Albermal, USA was used.

C12: brominated epoxy oligomer, YOB-406 from Kukdo Chemical Co., Ltd. was used.

Examples 1-10

After adding each of the components in the content as shown in Table 2 below, 6 parts by weight of antimony trioxide (ANTIS-W) of Korea Ilsung antimony as a flame retardant, 0.5 parts by weight of Irganox 1076 as a heat stabilizer and Dupont- as anti-dropping agent 0.3 parts by weight of TEFLON 7A-J from Mitsui Chemicals was added, followed by uniform mixing for 3 to 10 minutes in a Henschel mixer. The mixture was extruded in a conventional twin screw extruder at an extrusion temperature of 180 to 280 ° C., a screw rotational speed of 150 to 300 rpm, and a composition feed rate of 30 to 60 kg / hr. The prepared pellets were dried at 80 ° C. for 3 hours and then injected into a 6 Oz injection machine under conditions of a molding temperature of 180 to 280 ° C. and a mold temperature of 40 to 80 ° C. to prepare a specimen. The prepared specimens were left at 23 ° C. and 50% relative humidity for 40 hours, and then flame retardance was measured at a thickness of 1.5 mm according to UL 94 VB flame retardant regulations. The measurement results are shown in Table 2 together. Izod impact strength was measured under the condition of ASTM 256A at 1/8 "thickness (kgfcm / cm). The flowability was measured by Melt Flow Index (g / 10min) by ASTM D-1238. Condition.

As shown in Table 2, when the brominated diphenylethane mixture is applied, it can be seen that the physical properties are excellent while maintaining excellent flame retardance compared to the comparative example.

The present invention is stable to fire by using a brominated diphenylethane mixture, the compatibility is improved to excellent physical balance of heat resistance, impact resistance, workability and fluidity and to achieve V-0 flame retardancy even with a low flame retardant content It provides the effect of the invention to provide a flame retardant thermoplastic resin composition.

Simple modifications and variations of the present invention can be easily made by those skilled in the art, and all such modifications or changes can be seen to be included in the scope of the present invention.

Claims (13)

(A) 20 to 90 parts by weight of rubber-reinforced polystyrene resin; (B) 10 to 80 parts by weight of polyphenylene oxide resin; And To 100 parts by weight of the base resin consisting of (A) + (B), (C) A flame retardant thermoplastic resin composition comprising 0.01 to 30 parts by weight of a brominated diphenylethane mixture. The flame-retardant thermoplastic resin composition of claim 1, wherein the rubber-reinforced polystyrene resin (A) is a polymer of 1 to 30% by weight of a rubbery polymer and 70 to 99% by weight of an aromatic vinyl monomer. The flame retardant thermoplastic resin composition according to claim 1, wherein the polyphenylene oxide resin (B) is poly (2,6-dimethyl, 1,4-phenylene) ether. The brominated diphenylethane mixture (C) is prepared by brominating diphenylethane, and the hexabromodiphenyl ethane content of the whole brominated diphenylethane mixture is 5 to 85% by weight, and hep A flame-retardant thermoplastic resin composition comprising a content of tabromodiphenyl ethane in 0 to 30% by weight. The bromine diphenylethane mixture (C) according to claim 1, wherein the brominated diphenylethane mixture (C) contains hexabromodiphenyl ethane content of 55 to 85 wt% in the total brominated diphenylethane mixture, and an odd number of bromine is substituted for diphenylethane. Flame retardant thermoplastic resin composition comprising 1 to 25% by weight. The method of claim 1, wherein the brominated diphenyl ethane mixture (C) is 0 to 2% by weight of pentabromodiphenylethane, 55 to 85% by weight of hexabromodiphenylethane, 1 to 20% by weight of heptabromodiphenylethane, A flame retardant thermoplastic resin composition comprising 1 to 25% by weight of octabromodiphenylethane, 0 to 10% by weight of nonabromodiphenylethane and 0 to 5% by weight of decabromodiphenylethane. The method of claim 1, wherein the brominated diphenylethane mixture (C) is 5 to 15% by weight of pentabromodiphenylethane, 72 to 85% by weight of hexabromodiphenylethane, 2 to 10% by weight of heptabromodiphenylethane and Flame retardant thermoplastic resin composition comprising 0.1 to 3% by weight of octabromodiphenyl ethane. The method of claim 1, wherein the brominated diphenylethane mixture (C) is 55 to 75% by weight of hexabromodiphenylethane, 11 to 16% by weight of heptaromodiphenylethane, 10 to 20% by weight of octabromodiphenylethane and A flame-retardant thermoplastic resin composition comprising 1 to 9% by weight of nonabromodiphenyl ethane. The method of claim 1, wherein the brominated diphenylethane mixture (C) is 0.1 to 3% by weight pentabromodiphenylethane, 55 to 83% by weight hexabromodiphenylethane, 7 to 15% by weight heptaromodiphenylethane, A flame retardant thermoplastic resin composition comprising 5 to 20% by weight of octabromodiphenylethane and 1 to 7% by weight of nonabromodiphenylethane. The method of claim 1, wherein the brominated diphenylethane mixture (C) is 0.1 to 3% by weight pentabromodiphenylethane, 55 to 83% by weight hexabromodiphenylethane, 7 to 15% by weight heptaromodiphenylethane, A flame retardant thermoplastic resin composition comprising 5 to 20% by weight of octabromodiphenylethane, 1 to 7% by weight of nonabromodiphenylethane, and 0.01 to 1% by weight of decabromodiphenylethane. The method of claim 1, wherein the brominated diphenylethane mixture (C) is 55 to 83% by weight of hexabromodiphenylethane, 7 to 17% by weight of heptaromodiphenylethane, 5 to 23% by weight of octabromodiphenylethane, A flame retardant thermoplastic resin composition comprising 1 to 7% by weight of nonabromodiphenylethane and 0.01 to 1% by weight of decabromodiphenylethane. The flame retardant thermoplastic resin composition of claim 1, wherein the resin composition further comprises 1 to 10 parts by weight of antimony oxide. The method of claim 1, wherein the resin composition is a plasticizer, flame retardant, flame retardant aid, anti-drip agent, thermal stabilizer, mold release agent, weather stabilizer, halogen stabilizer, lubricant, filler, coupling agent, light stabilizer, antioxidant, colorant, antistatic agent, dispersant And an additive selected from the group consisting of impact modifiers.