KR20020044997A - Flame Retardant Thermoplastic Resin Composition - Google Patents

Abstract

PURPOSE: A flame retardant thermoplastic composition and a product prepared by using the composition are provided, to improve the balance of physical properties comprising heat resistance, heat stability, heat resistance, impact resistance, workability and appearance. CONSTITUTION: The flame retardant thermoplastic composition comprises 100 parts by weight of a polyphenylene ether-based resin comprising a polyphenylene ether resin or a mixture of a polyphenylene ether resin and a vinyl aromatic polymer; 1-30 parts by weight of oligomer-type phosphate ester morpholide-based compounds or their mixtures; 0.05-5 parts by weight of a fluoridated polyolefin-based resin with a mean particle size of 0.05-1,000 micrometers and a density of 1.2-2.3 g/cm¬3; and 0-40 parts by weight of a styrene-based impact reinforcement.

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 thermoplastic resin composition comprising a thermoplastic polyphenylene ether resin, a phosphate ester morphide flame retardant, a fluorinated polyolefin resin, and a styrene impact modifier.

Background of the Invention

Polyphenylene ether (PPE or PPO) resins or mixtures of polyphenylene ether and vinyl aromatic polymers (MPPO resins) have excellent mechanical and electrical properties and are widely used in various fields such as automobile parts, electrical parts, and electronic parts. However, molded articles made of such polyphenylene ether-based resins have various physical properties such as impact strength, tensile strength, and heat resistance, but have disadvantages in that they are generally combustible. Since the products molded from the polyphenylene ether resin composition are generally applied to large heat-dissipating materials such as electrical and electronic products, especially computer housings or other office equipment, they must have flame retardancy along with mechanical strength. do.

The technique of imparting flame retardancy to a resin composition has been studied so far, and generally, a method of imparting flame retardancy to a resin composition by adding a compound including antimony, halogen, phosphorus, or nitrogen is known and used.

U.S. Patent No. 3,639,506 discloses a technique of using a monomeric aromatic phosphate ester compound such as triphenylphosphate or the like or a mixture of this compound and a halogen compound as a flame retardant of a polyphenylene ether resin composition. However, the use of a monomeric aromatic phosphate ester compound may exhibit excellent flame retardancy and mechanical properties. However, the flame retardant migrates to the surface of the molded part during molding, causing a problem of juices and deterioration in the heat resistance of the resin composition. It has a disadvantage.

U. S. Patent No. 4,154, 775 discloses a technique of applying a cyclic phosphate compound to a polyphenylene ether resin composition as a flame retardant to improve flame retardancy without deteriorating physical properties such as impact strength. However, the compound is known to decompose or cause decomposition near the processing temperature of 250 ℃ has the disadvantage of lowering the inherent physical properties of the high heat-resistant polyphenylene ether resin.

Japanese Patent Laid-Open No. 59-202,240 discloses a technique of applying an aryl phosphate oligomer in the form of a condensed phosphate ester to a polyphenylene ether resin as a flame retardant. However, the application of a flame retardant in the form of a condensed phosphate ester to a polyphenylene ether resin has the advantage of less occurrence of juice phenomenon and improved heat resistance compared to the case of using a monomeric phosphate ester compound, but when a flame retardant of the same weight is used. Because of the disadvantage of lowering the flame retardancy, a higher amount of flame retardant must be added to secure an equivalent level of flame retardancy, and since a certain amount of the monomeric phosphate ester compound is included, It did not completely prevent the juice from moving.

Japanese Patent Laid-Open No. 2-187,456 discloses phosphorus compounds in the form of condensed phosphate esters. However, the example in which the phosphorus-based compound is applied is not only limited to the monomolecular-phosphorus-based compound having improved thermal properties, but the composition has a disadvantage in that the efficiency is reduced in terms of flame retardancy and dropping occurs during combustion depending on the composition.

On the other hand, the present inventors use an oligomeric phosphate ester morphide compound as a flame retardant to overcome the above problems and by applying a fluorinated polyolefin resin and a styrene impact modifier to a polyphenylene ether resin without the juice phenomenon To develop a flame retardant thermoplastic resin composition having excellent balance of properties such as flame retardancy, heat stability, heat resistance, impact resistance, workability and appearance.

An object of the present invention is to provide a thermoplastic resin composition that does not appear juicing phenomenon.

Another object of the present invention is to provide a thermoplastic resin composition excellent in flame retardancy.

Still another object of the present invention is to provide a thermoplastic resin composition having excellent balance of physical properties such as impact resistance, thermal stability, heat resistance, workability and appearance.

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

The thermoplastic resin composition of the present invention comprises (A) 100 parts by weight of polyphenylene ether resin, (B) 1-30 parts by weight of phosphate ester morphide compound, (C) 0.05-5 parts by weight of fluorinated polyolefin resin, (D A) styrene-based impact modifier 0-40 parts by weight, the detailed description of each of these components are as follows.

(A) polyphenylene ether resin

The polyphenylene ether resin according to the present invention may be a polyphenylene ether resin alone or a mixture of a polyphenylene ether resin and a vinyl aromatic polymer.

Specific examples of the polyphenylene ether resin include poly (2,6-dimethyl-1,4-phenylene) ether, poly (2,6-diethyl-1,4-phenylene) ether, 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-1,4- Copolymer of phenylene) ether and poly (2,3,6-trimethyl-1,4-phenylene) ether, poly (2,6-dimethyl-1,4-phenylene) ether and poly (2,3, Copolymers of 6-triethyl-1,4-phenylene) ether and the like can be used, and double poly (2,6-dimethyl-1,4-phenylene) ether and poly (2,3,6-trimethyl- Preference is given to using copolymers of 1,4-phenylene) ether or poly (2,6-dimethyl-1,4-phenylene) ether, in particular poly (2,6-dimethyl-1,4-phenylene Ether is most preferred.

The degree of polymerization of the polyphenylene ether resin used in the preparation of the resin composition of the present invention is not particularly limited, but considering the thermal stability and workability of the resin composition, the intrinsic viscosity when measured in a chloroform solvent at 25 ° C is measured. It is preferable that it is 0.2-0.8. It is also possible to use the above polyphenylene ether resins alone or to use two or more thereof in an appropriate ratio.

The above polyphenylene ether resins exhibit very good compatibility with vinyl aromatic polymers, in particular styrene-based polymers. As the vinyl aromatic polymer used in the component (A) of the present invention, polystyrene, high impact polystyrene (HIPS), polychlorostyrene, polyα-methylstyrene, polyt-butylstyrene and the like and copolymers thereof alone are used. Or a mixture of two or more thereof, and it is preferable to use double polystyrene or high impact polystyrene.

The molecular weight of the vinyl aromatic copolymer is not particularly limited either, but considering the thermal stability and workability of the resin composition, the weight average molecular weight is preferably 20,000 to 500,000.

(B) Phosphate Ester Morphoxide Compound

In the present invention, the phosphate ester morphide compound is used as a flame retardant, and is an oligomeric phosphate ester morphide compound or a mixture thereof represented by the following structural formula (1).

The oligomeric phosphate ester morphide compound is prepared by a conventional method using hydroxy aryl compounds such as resorcinol, hydroquinone, bisphenol-A and arylmorpholino chlorophosphate using an appropriate catalyst. At this time, aryl morpholino chlorophosphate may be prepared by reacting phosphorus oxychloride (POCl 3) with an aromatic alcohol and morpholine, and according to the reaction process, diaryl chlorophosphate and dimorpholino chlorophosphate are about 0-20% by weight. May be included.

Wherein x is 1 or 2, R ₁ is a C _6-20 aryl or alkyl substituted C _6-20 aryl group, R ₂ is a C _6-30 aryl or alkyl substituted C _6-30 aryl group derivative. In the above formula, n and m each represent a number average degree of polymerization, and the average value of n + m is 0.3-3.

Preferred examples of R ₁ are a phenyl group or a phenyl group substituted with an alkyl group such as methyl, ethyl, isopropyl, t-butyl, isobutyl, isoamyl, t-amyl, a double phenyl group or methyl, ethyl, isopropyl or t- Most preferred is a phenyl group substituted with a butyl group. R ₂ is preferably resorcinol, hydroquinone or bisphenol-A.

That is, the flame retardant component (B) used in the preparation of the resin composition of the present invention is an aryl derivative oligomeric phosphate ester morphide compound having an average value of n + m of 0.3-3. In the present invention, a phosphate ester morphide compound having a different value of n + m may be used alone or in a mixed form, each of which is already mixed when the polymerization process is prepared, or separately prepared. It is also preferable to use a mixture of phosphate ester morpholide compounds having different n + m values.

The oligomeric phosphate ester morphide prepared in the above manner is 0-10% by weight of 0 and n + m, and 50-100% by weight of n + m is 1 depending on the reaction process. 0-40 weight% of the value of + m is 2 or more is contained. The prepared composite can be used as it is or as a refined flame retardant, even when a mixture of a number of compounds does not change the properties as a flame retardant. It is preferable that the value of the number average polymerization degree n + m of the oligomeric phosphate ester morpholide compound used by this invention is 0.3-3. If the value of n + m is less than 0.3, it is difficult to prevent the juice from moving to the surface of the flame retardant, and if the value of n + m is 3 or more, the viscosity is too high, making the compound difficult to manufacture and the resin composition. have.

(C) fluorinated polyolefin resin

The fluorinated polyolefin resin (C) used in the preparation of the flame retardant thermoplastic resin composition of the present invention may be prepared using a known polymerization method, for example, a pressure of 7-71 kg / cm ² and a temperature of 0-200 ° C. , Preferably at 20-100 ° C., in an aqueous medium containing free radical forming catalysts such as sodium, potassium or ammonium peroxydisulfate.

Preferable specific examples of the fluorinated polyolefin resin (C) include polytetrafluoroethylene, polyvinylidene fluoride, tetrafluoroethylene / vinylidene fluoride copolymer, tetrafluoroethylene / hexafluoropropylene copolymer And ethylene / tetrafluoroethylene copolymers, and the like, polytetrafluoroethylene having a particle size of 0.05-1,000 μm and specific gravity of 1.2-2.3 g / cm ³ is most preferred. These may be used independently from each other, and two or more different types may be used together.

When the fluorinated polyolefin resin is mixed with other component resins of the present invention and extruded, a fluorinated polyolefin-based resin forms a fibrillar network in the resin, thereby lowering the flow viscosity of the resin during combustion and increasing the shrinkage rate, thereby dropping the resin. It is to prevent the phenomenon.

The fluorinated polyolefin resin may be used in an emulsion state or a powder state. When the fluorinated polyolefin resin in an emulsion state is used, the dispersibility in the entire resin composition is good, but the manufacturing process is complicated. Therefore, even if it is powder state, if it can disperse | distribute suitably in the whole resin composition and can form a fibrous network, it is preferable to use it in powder state.

The content of the fluorinated polyolefin resin used in the production of the resin composition of the present invention is 0.05-5 parts by weight with respect to 100 parts by weight of the polyphenylene ether resin (A).

(D) Styrene Shock Reinforcement

The styrenic impact modifier used in the present invention is derived from a vinyl aromatic monomer, and may be a block or a radial tere block copolymer in the form of AB or ABA. The AB or ABA type block or radial block copolymer is a copolymer composed of a vinyl aromatic monomer and a block of hydrogenated, partially hydrogenated or unhydrogenated unsaturated diene, and examples of the AB diblock type block copolymer include Polystyrene-polybutadiene, polystyrene-polyisoprene, polyalphamethylstyrene-polybutadiene copolymers, and hydrogenated forms thereof. Such AB diblock type copolymers are widely known commercially, and representative examples include Solprene, K-resin, and Kraton D and Kraton G from Phillips. Examples of ABA triblock type block copolymers include polystyrene-polybutadiene-polystyrene, polystyrene-polyisoprene-polystyrene, polyalphamethylstyrene-polybutadiene-polyalphamethylstyrene, polyalphamethylstyrene-polyisoprene-polyalphamethylstyrene Copolymers such as these and hydrogenated forms thereof. Such ABA triblock type copolymers are also widely known commercially, and are representative of Shell Cariflex, Kraton D, Kraton G and Kuraray Septon. Styrene-based impact modifiers used in the preparation of the resin composition of the present invention are optionally added, and 0-40 parts by weight based on 100 parts by weight of the polyphenylene ether (A).

The flame retardant thermoplastic resin composition of the present invention may include general additives such as flame retardant aids, lubricants, mold release agents, nucleating agents, antistatic agents, stabilizers, reinforcing agents, inorganic additive pigments or dyes according to the respective applications in addition to the above components. The inorganic additive to be used may be used in the range of 0-60 parts by weight, preferably 1-40 parts by weight, based on 100 parts by weight of the polyphenylene ether (A).

The resin composition of the present invention can be produced by a known method for producing a resin composition. For example, the components of the present invention and other additives may be mixed simultaneously, then melt extruded in an extruder and prepared in pellet form.

The compositions of the present invention can be used for molding a variety of products, and are particularly suitable for the manufacture of housings and interiors of electrical and electronic products, such as computer housings, which require high flame resistance and high flame resistance while being injected at high temperatures.

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

Example

Specifications of (A) polyphenylene ether resin, (B) oligomeric phosphate ester morphide flame retardant, (C) fluorinated polyolefin resin, and (D) styrene impact reinforcing material used in the following Examples and Comparative Examples Is as follows.

(A) polyphenylene ether resin

(a ₁ ) PPE P401 from Asahi Kasei of Japan was used.

(a ₂ ) A high impact polystyrene (HI-1190F, manufactured by Cheil Industries, Ltd., Korea) was used as a vinyl aromatic polymer mixed with polyphenylene ether.

(B) Oligomeric Phosphate Ester Morphoxide Flame Retardant

(b ₁ ) The oligomeric phosphate ester morphide compound was a reaction of resorcinol and phenylmorphorino chlorophosphate, in which R ₁ is a phenyl group and R ₂ is a resorcinol derivative. 1.5 wt% of a phosphate ester morpholide compound where both n and m are 0 and x is 1, 68.4 wt% of a compound of which x is 1 and the value of n + m is 1; A mixture of resorcinol-derived oligomeric phosphate ester morpholide compounds containing 30.1% by weight of two or more compounds was used.

(b ₂ ) The oligomeric phosphate ester morphide compound was reacted with bisphenol-A and phenylmorphorino chlorophosphate. In Formula 1, R ₁ is a phenyl group and R ₂ is a bisphenol-A derivative. 3.1 wt% of a phosphate ester morpholide compound having both n and m of 0 and x of 1, 84.7 wt% of a compound having x of 1 and a value of n + m of 1, x of 1 of A mixture of bisphenol-A derived oligomeric phosphate ester morphide compounds containing 12.2% by weight of two or more compounds was used.

(b ₃ ) In Comparative Example 1, a monomeric phosphate ester flame retardant was used, and TPP of Daihachi, Japan was used.

(b ₄ ) The monomeric phosphate ester morphide compound used in Comparative Example 3 was reacted with 2 mol of phenol and 1 mol of morpholine in 1 mol of phosphorus oxychloride, and contained 9% by weight of triphenylphosphate. In the structural formula I), R1 is a phenyl group, wherein x is 1 and n + m is 0. A monomeric phosphate ester morphide compound is used.

(b ₅ ) The oligomeric phosphate ester flame retardant used in Comparative Example 2 was derived from resorcinol, and the oligomeric phosphate ester compound having 2.5% by weight of the monomeric phosphate ester compound and the number average degree of polymerization 1 was 67.2. CR-733S, Daihachi, Japan, which used 21.5% by weight of the oligomeric phosphate ester compound having a weight average degree of polymerization of 2 and 8.8% by weight of the oligomeric phosphate ester compound having a number average degree of polymerization of 2 or more, was used.

(b ₆ ) The oligomeric phosphate ester flame retardant used in Comparative Example 4 was derived from bisphenol-A, which is 3.5% by weight of the monomeric phosphate ester compound and 86.7 of the oligomeric phosphate ester compound having a number average degree of polymerization of 16.7. CR-741S manufactured by Daihachi, Japan, which contains 9.8 wt% of an oligomeric phosphate ester compound having a weight percent and a number average degree of polymerization of 2 or more, was used.

(C) fluorinated polyolefin resin

Teflon (trade name) 7AJ of Dupont, USA was used.

(D) Styrene Shock Reinforcement

Kraton G 1651 from Shell, USA was used.

Example 1-3

Each component of the composition shown in Table 1, antioxidant and heat stabilizer were added, mixed in a conventional mixer, and extruded at a temperature of 240-270 ° C. using a twin screw extruder having L / D = 35 and Φ = 45 mm. The extrudate was prepared in pellet form.

Comparative Example 1-4

In Comparative Examples 1 and 3, monomeric phosphate esters or monomeric phosphate ester morphide compounds were used as flame retardants, and in Comparative Examples 2 and 4, oligomeric phosphate esters were used as flame retardants, as shown in Table 1, respectively. Specimens were prepared in the same manner as in Example 1-3 except for changing the composition of the components.

Example Comparative Example One 2 3 One 2 3 4 (A) Polyphenylene Ether Resin (a ₁ ) 50 75 60 50 50 75 75 High Impact Polystyrene (a ₂ ) 50 25 40 50 50 25 25 (B) Resorcinol Derived Oligomeric Phosphoric Acid Ester Morphoxide Compound (b ₁ ) 16 - 13 - - - - Bisphenol-A derived oligomer-type phosphate ester morphide compound (b ₂ ) - 11 - - - - - Monomer phosphate ester flame retardant (b ₃ ) - - - 16 - - - Monomer Phosphoric Acid Ester Morphoxide Compound (b ₄ ) - - - - - 11 - Resorcinol-derived oligomeric phosphate ester flame retardant (b ₅ ) - - - - 16 - - Bisphenol-A derived oligomeric phosphate ester flame retardant (b ₆ ) - - - - - - 11 (C) Fluorinated polyolefin resin 0.1 0.1 0.1 0.1 0.1 0.1 0.1 (D) styrene impact reinforcement - 0.5 5 - - 0.5 0.5

(1) Thermal stability measurement

The thermal stability of the resin composition prepared by the above method was measured by reducing the mass of the composition while increasing the temperature at a rate of 20 ° C./min in a nitrogen atmosphere to measure the decomposition start temperature. At this time, the temperature at which the resin actually decomposed after the temperature at which the flame retardant was volatilized was measured.

(2) general physical property measurement

Specimens were prepared using a 10 oz injection machine under normal molding conditions at injection temperatures of 250-280 ° C. for general physical property measurements. After the specimens were left at 23 ° C. and 50% relative humidity for 40 hours, the Izod impact strength was measured according to ASTM D256. The flexural modulus was evaluated by ASTM D790.

(3) flame retardancy evaluation

Specimens for flame retardancy evaluation were prepared at 250-280 ° C. using a 10 oz injection machine. Flame retardancy was evaluated according to the UL-94VB evaluation standard defined by the Underwriters Laboratory, and the combustion time and the average combustion time when two flames were applied to five specimens were measured.

(4) thermal stability evaluation

Evaluation of the thermal stability was determined by observing the weight loss of the prepared pellets by thermogravimetric analysis (Thermal Gravimetric Anaysis) when the pellets prepared for 30 minutes in the nitrogen atmosphere. In addition, the heat distortion temperature was evaluated by the standard of ASTM D648.

(5) occurrence of juice

The generation of the juice is based on the number of injection specimens that start to appear on the surface of the injection when a 200 mm × 50 mm × 2 mm size plate is continuously injected using a 10 oz injection machine using a resin composition. Judging by. At this time, the injection temperature was maintained at 250-280 ℃, the mold temperature 50 ℃.

The physical properties of the resins prepared in Examples 1-3 and Comparative Examples 1-4 are shown in Table 2. Example 1-3 is a case where an oligomeric phosphate ester morphide compound is used as a flame retardant. In Comparative Examples 1 and 3, a monomeric phosphate ester or a monomeric phosphate ester morphide compound is used as a flame retardant, and a comparative example is used. In 2 and 4 oligomeric phosphate esters were used as flame retardants.

Properties Example Comparative Example One 2 3 One 2 3 4 UL94 flame retardant (1/16 ″) V-0 V-0 V-0 V-0 V-1 V-0 V-1 Average burning time (seconds) 2.8 2.5 2.7 2.7 5.5 2.6 5.8 Maximum single burning time (sec) 5 4 6 5 17 5 20 Flexural modulus (kgf / cm ² ) 26100 27000 25500 25100 25000 25600 25500 Notch Impact Strength (1/8 ″, kgcm / cm) 15 16 29 15 17 15 16 Heat deflection temperature (HDT, ℃) 86 125 104 79 82 118 121 Weight loss rate (%, 250 ℃ 30 minutes) 1.9 1.2 1.5 12.5 1.7 8.9 1.1 Juice-injected injection water 42 51 46 12 43 14 53

From the results of Table 2, Example 1-3 using the oligomer-type phosphate ester morphide compound as a flame retardant all showed excellent flame retardancy, elastic modulus and heat deformation temperature, but no juice phenomenon. Comparative Examples 1 and 3 have the same composition as Examples 1 and 2 except that the flame retardant is a monomeric phosphate ester or a monomeric phosphate ester morphide compound, and the monomeric phosphate ester or monomeric phosphate ester hair as a flame retardant When the polydide compound is used, it can be seen that the heat deformation temperature is lowered, the weight loss is severe, and the thermal stability is lowered. In addition, Comparative Examples 2 and 4 have the same composition as Examples 1 and 2, and replaced the flame retardant with an oligomeric phosphate ester. In this case, the thermal stability and the juice phenomenon did not easily appear, but the flame retardancy was very low. The heat resistance and heat deflection temperature were also lowered.

According to the present invention, an oligomer-type phosphate ester morphide compound is used as a flame retardant, so that the physical properties such as flame retardancy, thermal stability, heat resistance, impact resistance, workability, and appearance are excellent without the juice phenomenon. It has the effect of providing a flame-retardant thermoplastic resin composition useful for producing injection moldings for housings, interior materials, and other office equipment.

Simple modifications or changes of the present invention can be easily carried out 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 (7)

(A) 100 weight part of polyphenylene ether resin which consists of polyphenylene ether resin or the mixture of polyphenylene ether and a vinyl aromatic polymer; (B) 1-30 parts by weight of the oligomeric phosphate ester morphide compound or a mixture thereof; (C) 0.05-5 parts by weight of a fluorinated polyolefin resin having an average particle size of 0.05-1000 μm and a density of 1.2-2.3 g / cm 3; And (D) 0-40 parts by weight of a styrenic impact modifier; Flame-retardant thermoplastic resin composition, characterized in that consisting of. The method of claim 1, wherein the polyphenylene ether resin is poly (2,6-dimethyl-1,4-phenylene) ether, poly (2,6-diethyl-1,4-phenylene) ether, 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- Copolymer of 1,4-phenylene) ether and poly (2,3,6-trimethyl-1,4-phenylene) ether, poly (2,6-dimethyl-1,4-phenylene) ether and poly ( 2,3,6-triethyl-1,4-phenylene) ether copolymer and a mixture thereof, flame retardant thermoplastic resin composition. The flame retardant of claim 1, wherein the vinyl aromatic polymer is selected from the group consisting of polystyrene, high impact polystyrene (HIPS), polychlorostyrene, polyα-methylstyrene, polyt-butylstyrene, and mixtures thereof. Thermoplastic resin composition. The flame retardant thermoplastic resin composition according to claim 1, wherein the oligomeric phosphate ester morphide compound (B) is represented by the following general formula (1). Formula (1) (In formula (1), x is 1 or 2, R ₁ is a C _6-20 aryl or alkyl substituted C _6-20 aryl group, R ₂ is C _6-30 aryl or alkyl substituted C _{6- 30} aryl group derivative, n and m are each number average degree of polymerization, and the average value of n + m is 0.3-3.) The flame retardant thermoplastic resin composition according to claim 4, wherein R ₁ is a phenyl group or a phenyl group substituted with an alkyl group such as methyl, ethyl, isopropyl or t-butyl. The flame retardant thermoplastic resin composition according to claim 4, wherein R ₂ is resorcinol, hydroquinone or bisphenol-A derivative. The molded article manufactured from the resin composition of any one of Claims 1-6.