KR100602850B1 - Flameproof Thermoplastic Resin Composition - Google Patents

Abstract

The thermoplastic resin composition having the flame retardancy of the present invention is 40 to 95 parts by weight of rubber modified styrene resin (A), 60 to 5 parts by weight of polyphenylene ether resin (B), and 10 to 40 parts by weight of styrene resin (C) 2 to 30 parts by weight of styrene-acrylonitrile copolymer resin (D) having an acrylonitrile content of 5 to 18% by weight based on 100 parts by weight of the base resin (A) + (B) + (C) made It relates to a thermoplastic resin composition having excellent flame retardancy and heat resistance to which 0.5 to 30 parts by weight of the phenic acid metal salt compound (E) and 0 to 30 parts by weight of the aromatic phosphate ester compound (F) are applied. The thermoplastic resin composition may further include a plasticizer, a heat stabilizer, an antioxidant, a light stabilizer, a compatibilizer, a pigment, a dye, and / or an inorganic additive, depending on the use.

Flame retardant resin composition, acrylonitrile, alkyl phosphinic acid metal salts, aromatic phosphate esters, heat resistance

Description

Thermoplastic flame retardant resin composition

Field of invention

The present invention relates to a thermoplastic flame retardant resin composition. More specifically, the present invention relates to an alkyl phos as a flame retardant in a resin blend comprising a rubber modified styrene resin, a polyphenylene ether resin, a styrene resin, and a styrene-acrylonitrile copolymer resin having an acrylonitrile content of 5-18%. A thermoplastic resin composition to which an aromatic phosphate ester compound is selectively applied together with a phenic acid metal salt compound.

Background of the Invention

Rubber-modified styrene resins, especially acrylonitrile-butadiene-styrene copolymer resins (hereinafter referred to as 'ABS resins') have good processability, excellent physical properties, particularly impact strength, and good appearance. Many applications have been applied. However, when applied to heat-dissipating products such as personal computers or fax machines, they have been manufactured by applying flame-retardant resins due to the disadvantages of combustibility.

Known flame retardant methods that are most commonly applied is to impart flame retardant properties by applying a halogen compound and an antimony compound to the rubber-modified styrene resin. However, halogen-containing compounds can damage the mold and have a fatal effect on the human body by the hydrogen halide gas generated during processing. In addition, since polybrominated diphenyl ethers, which are mainly halogen-based flame retardants, are highly likely to generate very toxic gases such as dioxins and furans during combustion, attention has been focused on flame-retardant methods that do not apply halogen-based compounds.

Although a method of imparting flame retardancy to a resin composition by adding a compound containing phosphorus or nitrogen as a compound that does not contain halogen has been studied, the phosphorus compound alone has a disadvantage of lowering the heat resistance of the rubber-modified styrene resin and lacking in flame retardancy. There is a limit to the application.

In general, the rubber-modified styrene resin has a disadvantage in that it is difficult to expect a flame retardant effect in the solid phase because there is little char remaining during combustion (Journal of Applied Polymer Science, 1998, Vol 68, p1067). Therefore, by adding an additional char forming agent so that the char can be produced smoothly to obtain the desired flame retardancy.

According to Japanese Patent Application Laid-Open No. 7-48491, thermoplastic flame-retardant resins are applied by applying phosphate ester as a flame retardant to thermoplastic copolymer resins such as high-molecular polymers and aromatic vinyl monomers, and by adding a novolak-type phenolic resin as a char forming agent. Prepared. However, phenolic resins not only lower the heat resistance of styrene resins, but also have insufficient char forming ability, so that a relatively large amount of phosphate ester and novolak resin must be added to obtain desired flame retardancy, and thus mechanical strength such as heat resistance and impact strength is required. Has the disadvantage of further lowering.

Therefore, the inventors of the present invention do not use phenol resins, but improve the compatibility of rubber modified styrene copolymers, polyphenylene ether resins and styrene resin blends as basic resins to improve thermal stability and flame retardancy. By applying a styrene-acrylonitrile copolymer having an acrylonitrile content of%, a thermoplastic resin having excellent mechanical properties has been developed and patented.

The use of an alkyl phosphinic acid metal salt compound as a flame retardant and optionally an aromatic phosphate ester compound together has led to the development of a resin composition excellent in flame retardancy and heat resistance.

An object of the present invention is a styrene-acryl with a acrylonitrile content of 5-18% as a compatibilizer, based on a rubber-modified styrene resin, a polyphenylene ether resin, and a styrene resin blend containing no halogen. To provide a resin composition excellent in flame retardancy by applying a ronitrile copolymer and using an alkyl phosphinic acid metal salt compound and an aromatic phosphate ester compound as flame retardants.

Another object of the present invention is to provide a resin composition having excellent heat resistance together with excellent flame resistance.

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

Summary of the Invention

The thermoplastic resin composition having the flame retardancy of the present invention is 40 to 95 parts by weight of rubber modified styrene resin (A), 60 to 5 parts by weight of polyphenylene ether resin (B), and 10 to 40 parts by weight of styrene resin (C) 2 to 30 parts by weight of styrene-acrylonitrile copolymer resin (D) having an acrylonitrile content of 5 to 18% by weight based on 100 parts by weight of the base resin (A) + (B) + (C) made It relates to a thermoplastic resin composition having excellent flame retardancy and heat resistance to which 0.5 to 30 parts by weight of the phenic acid metal salt compound (E) and 0 to 30 parts by weight of the aromatic phosphate ester compound (F) are applied.

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

Detailed Description of the Invention

The flame retardant thermoplastic resin composition of the present invention is a base resin (A) + (B) + (C) consisting of a rubber modified styrene resin (A), a polyphenylene ether resin (B), and a styrene resin (C) ) Based on 100 parts by weight, a styrene-acrylonitrile copolymer resin (D) having an acrylonitrile content of 5 to 18% by weight is used as a compatibilizer, and an alkyl phosphinic acid metal salt compound (E) is optionally used as a flame retardant. The aromatic phosphate ester compound (F) is applied. Each composition is explained in full detail.

A. Rubber modified styrene resin (ABS resin)

Rubber modified resin refers to a polymer in which a rubber polymer is dispersed in a particulate form in a matrix (continuous phase) made of a vinyl aromatic polymer, and an aromatic vinyl monomer and a vinyl monomer copolymerizable therewith in the presence of a rubber polymer It is prepared by addition and polymerization. Such rubber-modified styrene resins can be produced by known polymerization methods such as emulsion polymerization, suspension polymerization, and bulk polymerization, and are usually produced by mixed extrusion of graft copolymer resin and copolymer resin. In the case of bulk polymerization, rubber modified styrene resins are produced by only one step reaction without preparing graft copolymer resins and copolymer resins, but in any case, the rubber content of the final rubber modified styrene resin components 5-30 weight part with respect to a suitable thing. Examples of such resins include acrylonitrile-butadiene-styrene copolymer resins (ABS), acrylonitrile-acryl rubber-styrene copolymer resins (AAS), acrylonitrile-ethylenepropylene rubber-styrene copolymer resins, and the like. .

The resin may be applied to the graft copolymer resin alone, or may be applied to the graft copolymer resin and the copolymer resin, which is preferably combined in consideration of their compatibility.

A1. Styrene-acrylonitrile-containing graft copolymer resin

Examples of the rubber used for the graft copolymer resin include diene rubbers such as polybutadiene, poly (styrene-butadiene) and poly (acrylonitrile-butadiene); Saturated rubber hydrogenated to the diene rubber; Acrylic rubbers such as isoprene rubber and butyl polyacrylate; Ethylene-propylene-diene monomer terpolymer (EPDM) and the like can be enumerated, but especially diene rubber is preferred, and more preferably butadiene rubber is suitable. The content of rubber is suitably 10 to 60 parts by weight in the weight of the graft copolymer resin.

Among the graft polymerizable monomer mixtures, aromatic vinyl monomers include styrene, α-methyl styrene, p-methyl styrene, etc., of which styrene is most preferred, and at least one monomer copolymerizable with an aromatic vinyl monomer may be used. Introduce and apply. Preferable monomers include vinyl cyanide compounds such as acrylonitrile and unsaturated nitrile compounds such as methacrylonitrile.

The weight ratio of rubber in the graft copolymer as a whole component is 10 to 60 parts by weight, the component of the monomer grafted to the rubber is 50 to 82 parts by weight of an aromatic vinyl monomer such as styrene, unsaturated nitrile monomer Is applied by graft copolymerization by adding 50 to 18 parts by weight. Further, in order to impart properties such as workability and heat resistance, graft polymerization may be performed by adding monomers such as acrylic acid, methacrylic acid, maleic anhydride, and N-substituted maleimide. The amount added is preferably 0 to 40 parts by weight based on the graft resin as a whole.

When preparing the graft copolymer, the average size of the rubber particles is suitably in the range of 0.1 to 4 μm in consideration of impact strength and appearance.

A2. Styrene-acrylonitrile-containing copolymer resin

The copolymer resin is prepared according to the monomer ratio and compatibility of the graft copolymer prepared in the above composition except for rubber, and the components thereof are as follows.

As the aromatic vinyl monomer to be copolymerized, styrene, α-methyl styrene, p-methyl styrene, and the like may be added. Of these, styrene is most preferred, and the weight ratio of the aromatic vinyl monomer in the components of the copolymer resin is 50 to 82 weight. Corresponds to wealth. One or more monomers copolymerizable with the aromatic vinyl monomers described above are introduced and applied thereto. As the monomer to be introduced, unsaturated nitrile compounds such as acrylonitrile and methacrylonitrile are preferable, and 18 to 50 parts by weight of the components of the entire copolymer are introduced. Furthermore, 0-40 weight part of monomers, such as acrylic acid, methacrylic acid, maleic anhydride, and N-substituted maleimide, can be added and copolymerized here.

In the rubber-modified styrene resin (A), the styrene-acrylonitrile-containing graft copolymer resin (A1) is 20 to 100% by weight and the styrene-acrylonitrile-containing copolymer resin (A2) is 0 to 80% by weight. It is preferred to be used.

B. Polyphenylene Ether Resin

Since the rubber-modified styrene resin itself is not flame retardant and its rigidity and heat resistance are lowered, polyphenylene ether resin is added as the base resin.

Examples of the polyphenylene ether resin used in the present invention include poly (2,6-dimethyl-1,4-phenylene) ether, poly (2,6-diethyl-1,4-phenylene) ether, and poly (2 , 6-dipropyl-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, Copolymer of 4-phenylene) ether and poly (2,3,6-trimethyl-1,4-phenylene) ether, and poly (2,6-dimethyl-1,4-phenylene) ether and poly (2 And copolymers of 3,5-triethyl-1,4-phenylene) ether. 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, more preferably poly (2,6-dimethyl-1,4-phenylene) ether.

Although the degree of polymerization of the polyphenylene ether is not particularly limited, it is preferable that the intrinsic viscosity measured in the chloroform solvent at 25 ° C. is 0.2 to 0.8 in consideration of thermal stability and workability of the resin composition. In the present invention, the polyphenylene ether resin is used at 5 to 60 parts by weight. When used in less than 5 parts by weight, the flame retardancy, rigidity and heat resistance is lowered, if 60 parts by weight, the object of the present invention can not be achieved.

C. Styrene Resin

Styrene-based resins can be prepared using a bulk polymerization, suspension polymerization, emulsion polymerization or a mixture thereof, the following description of the bulk polymerization of these polymerization methods as an example.

At least one selected from aromatic monoalkenyl monomers, alkyl ester monomers of acrylic acid or methacrylic acid with respect to 0 to 20 parts by weight of rubber selected from butadiene rubbers, isoprene rubbers, copolymers of butadiene and styrene or alkyl acrylate rubbers 80 to 100 parts by weight of the monomer may be added, and the resin may be prepared by bulk polymerization using at least one initiator selected from benzoyl peroxide, t-butyl hydroperoxide, acetyl peroxide, and cumene hydroperoxide.

The above styrene resins may be used alone or mixed with each other, a resin having a rubber content of 0 and a resin containing a rubber. In the present invention, the styrene resin is used in 10 to 40 parts by weight. It is impossible to achieve the object of the present invention outside the above range.

D. Styrene-acrylonitrile copolymer resin having an acrylonitrile content of 5-18 wt%

The styrene-acrylonitrile copolymer resin is a polymer added to improve compatibility of the ABS resin and the polyphenylene ether resin. The content of styrene in the components of the styrene-acrylonitrile copolymer is 82 to 95 parts by weight and the content of acrylonitrile is 5 to 18 parts by weight. The polymerization method of the styrene acrylonitrile copolymer may be prepared by applying emulsification, suspension, bulk polymerization, etc., and a suitable weight average molecular weight is 50,000 to 200,000. A copolymerizable monomer may be further applied to the styrene-acrylonitrile. Examples of such monomers include methacrylate or phenylmaleimide.

In addition, styrene may be replaced with α-methylstyrene for improved heat resistance.

If the styrene-acrylonitrile copolymer is not added, the compatibility of the blend of the rubber-modified styrene-based resin and the polyphenylene ether resin cannot be improved, and thus the mechanical strength is drastically lowered, making it difficult to apply the actual product.

The styrene-acrylonitrile copolymer resin (D) having an acrylonitrile content of 5 to 18% by weight is used in the range of 2 to 30 parts by weight based on 100 parts by weight of the base resin (A) + (B) + (C). More preferably, it is used within the range of 5 to 20 parts by weight. When used in less than 2 parts by weight, mechanical strength is sharply lowered, it is difficult to apply the actual product, if it exceeds 30 parts by weight, the object of the present invention can not be achieved.

E. Alkyl Phosphonic Acid Metal Salt Compounds

As flame retardant, an alkyl phosphinic acid metal salt compound of formula I is used.

[Formula I]

In Formula I, R ₁ and R ₂ are each independently an alkyl or phenyl group of C ₁ -C ₆ , M is calcium, magnesium, aluminum or zinc as a metal ion, and m is 2 or 3.

Compounds corresponding to the above formula (I) include aluminum methylethyl phosphonic acid, aluminum dimethyl phosphonic acid, zinc dimethyl phosphinic acid and the like. These alkyl phosphinic acid metal salt compounds may be applied independently or in mixtures, respectively.

The alkyl phosphinic acid metal salt compound (E) is used in the range of 0.5 to 30 parts by weight based on 100 parts by weight of the base resin (A) + (B) + (C), more preferably in the range of 3 to 20 parts by weight. use. When used in less than 0.5 parts by weight, the desired flame retardancy is not obtained, when used in excess of 30 parts by weight cannot achieve the object of the present invention.

F. Aromatic Phosphate Ester Compounds

Phosphoric acid esters that can be used in the present invention are compounds represented by the following structural formula II.

Structural Formula II

In Formula II, R ₃ , R _4, and R ₅ are each independently hydrogen or an alkyl group of C ₁ -C ₄ , and X is a C ₆ -C ₂₀ aryl group or a C ₆ -C ₂₀ aryl group substituted with an alkyl group. As derived from dialcohols such as resorcinol, hydroquinol, bisphenol-A, bisphenol-S, and n ranges from 0 to 4.

Examples of the compound represented by Formula II include triphenylphosphate, tricresylphosphate, trigyrenylphosphate, tri (2,6-dimethylphenyl) phosphate, and tri (2,4,6-trimethylphenyl) when n is 0. Phosphate, tri (2,4-dibutylbutylphenyl) phosphate, tri (2,6-dibutylbutylphenyl) phosphate, and the like, when n is 1, resorcinol bis (diphenyl) phosphate, resorcinol Bis (2,6-dimethylphenyl) phosphate, resorcinolbis (2,4-dibutylbutyl) phosphate, hydroquinolbis (2,6-dimethylphenyl) phosphate, hydroquinolbis (2,4-diary) Butylphenyl) phosphate etc. are typical examples. These phosphate ester compounds may be applied alone or may be applied to each mixture.

The aromatic phosphate ester compound (F) can be used up to 30 parts by weight, more preferably up to 20 parts by weight, based on 100 parts by weight of the base resin (A) + (B) + (C).

In the thermoplastic resin manufacturing method of the present invention, an antidrip agent, an impact modifier, an inorganic additive, a heat stabilizer, an antioxidant, a light stabilizer, a pigment, and / or a dye may be added according to each use. Examples of the inorganic additives to be added include asbestos, glass fibers, talc, ceramics, sulfates, and the like, which can be used within a range of 50 parts by weight based on 100 parts by weight of the base resin of the present invention.

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

Example

Preparation and specifications of the base resin, the compatibilizer and the flame retardant additive used in the Examples and Comparative Examples illustrated in Table 1 below are as follows.

A. Rubber modified styrene resin (ABS resin)

A1. Graft ABS resin

36 parts by weight of styrene, 14 parts by weight of acrylonitrile and 150 parts of deionized water were added to a monomer for grafting butadiene rubber latex to 50 parts by weight as a solid, 1.0 parts of potassium oleate, 0.4 part of cumene hydroperoxide and mercap 0.2 part of carbon-based chain transfer agent, 0.4 part of glucose, 0.01 part of iron sulfate hydrate, 0.3 part of pyrophosphate sodium salt were added and maintained at 75 ° C. for 5 hours to complete the reaction to prepare graft ABS latex, and sulfuric acid was added to the solids of the resin. 0.4 parts by weight of the resin was added and coagulated to prepare a graft copolymer resin (g-ABS) powder.

A2. Styrene-containing copolymer resin (AN content 25%)

75 parts by weight of styrene, 25 parts by weight of acrylonitrile, 120 parts of deionized water, 0.15 parts of azobisisobutyronitrile, 0.4 parts of tricalcium phosphate, 0.2 parts of mercaptan-based chain transfer agent, and 90 minutes from room temperature to 80 ° C. After raising the temperature for 180 minutes at this temperature to prepare a copolymer resin (SAN) having an acrylonitrile content of 25% by weight. It is washed with water, dehydrated and dried to prepare a SAN powder.

B. Polyphenylene Ether (PPE) Resins

Poly (2,6-dimethyl-1,4-phenylene) ether (trade name P-402) of Asahi Kasei Co., Ltd., Japan, was used. The particle size was in the form of a powder having an average particle diameter of several tens of micrometers.

C. Styrene Resin

C1. GPPS

Cheil Industries Co., Ltd. GPPS [brand name HF-2680] was used. The average molecular weight is about 210,000.

C2. Rubber Reinforced Styrene Resin (HIPS)

Cheil Industries Co., Ltd., a rubber-reinforced styrene resin (trade name HG-1760S) was used. The butadiene rubber used has a particle size of 0.4 m and a rubber content of about 7 wt%.

D. Styrene-acrylonitrile copolymer resin (AN content 13% SAN).

87 parts by weight of styrene, 13 parts by weight of acrylonitrile, 120 parts of deionized water, 0.1 part of azobisisobutyronitrile, 1,1'di (tertiarybutylperoxy) 3,3 ', 5trimethylcyclohexane 0.2 In addition, 0.4 part of tricalcium phosphate and 0.2 part of mercaptan-based chain transfer agent were added, and the temperature was raised from room temperature to 80 ° C. for 90 minutes, the temperature was maintained at this temperature for 150 minutes, the temperature was further increased to 95 ° C., and maintained for 120 minutes. A 13% copolymer resin (SAN) was produced. It is washed with water, dehydrated and dried to prepare a SAN powder.

E. Alkyl Phosphonic Acid Metal Salt Compounds

Methylethylphosphonic acid aluminum salt was used and was white solid.

F. Aromatic Phosphate Ester Compounds

The resorcinol di (2,6-dimethylphenyl) phosphate [trade name PX-200] of Nippon Scorpion Co., Ltd. was used.

The materials of A to F indicated above are added to the contents as shown in Table 1 below, and are extruded at a temperature range of 200 to 280 ° C. in a conventional twin screw extruder to prepare pellets.

The prepared pellet was dried at 80 ° C. for 3 hours, and then injected into a 6 Oz injection machine at a molding temperature of 220-280 ° C. and a mold temperature of 40 ° C. to 80 ° C. to prepare a physical specimen. The prepared specimens were measured for flame retardancy at a thickness of 1/12 "in accordance with UL 94 VB flame retardant regulations, and the heat deflection temperature was measured at 5 kgf load according to ASTM D1525.

Item Example 1 Example 2 Example 3 Example 4 (A) Rubber modified styrene resin (a1) 20 20 20 30 (a2) 30 30 30 20 (B) PPE 30 30 30 35 (C) styrene resin (c1) 20 20 - 10 (c2) - - 20 5 (D) styrene-acrylonitrile copolymer resin 13 13 13 13 (E) Alkyl phosphinic acid metal salt compound 18 9 6 8 (F) Aromatic Phosphate Ester Compounds - 4 12 10 Flame retardancy (1/12 ″) V-1 V-1 V-0 V-0 Heat Deflection Temperature (℃) 110 107 101 103

Item Comparative Example 1 Comparative Example 2 Comparative Example 3 (A) Rubber modified styrene resin (a1) 20 20 30 (a2) 30 30 20 (B) PPE 30 30 30 (C) styrene resin (c1) 20 20 - (c2) - - 20 (D) styrene-acrylonitrile copolymer resin 13 13 13 (E) Alkyl phosphinic acid metal salt compound - - - (F) Aromatic Phosphate Ester Compounds - 13 18 Flame retardancy (1/12 ″) Fail Fail V-1 Heat Deflection Temperature (℃) 118 94 88

When using an alkyl phosphinic acid metal salt compound as a flame retardant in Examples 1 to 4 from Tables 1 and 2 or using an alkyl phosphonic acid metal salt compound together with an aromatic phosphate ester compound, the phosphate esters in Comparative Examples 1 to 3 It can be seen that the flame retardancy and the heat resistance are superior to those when the compound is applied alone.

The present invention is based on a rubber-modified styrene resin, a polyphenylene ether resin, and a styrene resin blend containing no halogen, and a styrene-acrylonitrile having an acrylonitrile content of 5-18% as a compatibilizer. Applying a copolymer and using alkyl phosphinic acid metal salt compounds and aromatic phosphate ester compounds as flame retardants has the effect of providing a resin composition having excellent heat resistance with excellent flame resistance.

Simple modifications and variations of the present invention can be readily used by those skilled in the art, and all such variations or modifications can be considered to be included within the scope of the present invention.

Claims (6)

(A) 20 to 100% by weight of styrene-acrylonitrile graft copolymer resin having 10 to 60 parts by weight of the rubber component and 18 to 50% by weight of the acrylonitrile except the rubber component and (A2) 40 to 95 parts by weight of a rubber-modified styrene-acrylonitrile copolymer resin composed of 80 to 0 wt% of an styrene-acrylonitrile copolymer resin having an acrylonitrile content of 18 to 50 wt%; (B) 60 to 5 parts by weight of polyphenylene ether resin; (C) 10 to 40 parts by weight of styrene resin; (D) 2 to 30 parts by weight of a styrene-acrylonitrile copolymer having an acrylonitrile content of 5 to 18% by weight based on 100 parts by weight of the base resin (A) + (B) + (C); And (E) 0.5 to 30 parts by weight of an alkyl phosphinic acid metal salt compound represented by the following structural formula I with respect to 100 parts by weight of the base resin (A) + (B) + (C); A thermoplastic flame retardant resin composition, comprising: Structural Formula I

In Formula I, R ₁ and R ₂ are independently of each other an alkyl or phenyl group of C ₁ -C ₆ , M is a metal ion, calcium, magnesium, aluminum or zinc, m is 2 or 3. (F) The thermoplastic flame retardant resin composition according to claim 1, further comprising an aromatic phosphate ester at 30 parts by weight or less based on 100 parts by weight of the base resin (A) + (B) + (C). The thermoplastic flame retardant resin composition according to claim 1, wherein the polyphenylene ether resin (B) is poly (2,6-dimethyl-1,4-phenylene) ether. delete The thermoplastic flame retardant resin composition according to claim 2, wherein the aromatic phosphate ester compound (F) is a compound represented by the following structural formula II: [Structure Formula II]

In Formula II, R ₃ , R _4, and R ₅ are each independently hydrogen or an alkyl group of C ₁ -C ₄ , and X is a C ₆ -C ₂₀ aryl group or a C ₆ -C ₂₀ aryl group substituted with an alkyl group. As derived from dialcohols such as resorcinol, hydroquinol, bisphenol-A, bisphenol-S, and the range of n is from 0 to 4. The antidripping agent of claim 2. A thermoplastic resin composition further comprising a plasticizer, a heat stabilizer, an antioxidant, a light stabilizer, a compatibilizer, a pigment, a dye, and / or an inorganic additive.