JP2008115209A - Thermoplastic resin composition - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a thermoplastic resin composition that has excellent flame retardance and tracking resistance, improved low warpage properties and excellent mechanical properties and is useful for cases, covers, electrical components, etc., as electric/electronic components without impairing essential properties of a polyester resin. <P>SOLUTION: The composition is a composition obtained by mixing (A) 30-50 wt.% of a thermoplastic polyester resin with (B) 10-30 wt.% of an ABS resin, (C) 10-20 wt.% of a brominated epoxy compound, (D) 1-10 wt.% of an antimony compound and (E) 10-30 wt.% of a glass fiber based on 100 wt.% of the total of the components (A), (B), (C), (D) and (E) and is obtained by adding (F) 5-20 pts.wt. of talc having a volume-average particle diameter of 1-10 μm and (G) 5-20 pts.wt. of mica having a volume-average particle diameter of 10-60 μm to 100 pts.wt. of the total of the components (A), (B), (C), (D) and (E). <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a thermoplastic resin composition, and more particularly to a thermoplastic resin composition exhibiting excellent flame retardancy, electrical characteristics, and low warpage.

  Thermoplastic polyester resins typified by polyethylene terephthalate and polybutylene terephthalate (hereinafter referred to as “PBT”) are widely used in automotive parts, electrical / electronic parts, etc. by utilizing their excellent chemical and mechanical properties. Used in the field.

However, the thermoplastic polyester resin is poor in flame retardancy, and in particular, it is essential to make it flame retardant when applied to electric and electronic parts.
In addition, thermoplastic polyester resins represented by polyethylene terephthalate and polybutylene terephthalate are crystalline resins, so the warpage of molded products increases due to dimensional changes accompanying crystallization during molding. In application to applications such as a cover, a cover, and an electrical component, it is necessary to reduce the warpage of the molded product.

  Conventionally, a method for blending a flame retardant aid such as a halogen compound, a phosphorus compound, and an antimony compound is generally used as a method for making a thermoplastic polyester resin flame retardant. When such a flame retardant and a flame retardant aid are blended, there are problems such as a decrease in mechanical properties such as tensile elongation and a decrease in electrical insulation, particularly tracking resistance.

In order to improve such disadvantages of the thermoplastic polyester resin, as described in Patent Document 1, by adding ammonium polyphosphate, a halogen-based polymer flame retardant and an inorganic filler to the thermoplastic resin, A method of imparting tracking resistance, flame retardancy, and good mechanical properties has been proposed. Further, as described in Patent Document 2, a method for obtaining flame retardancy and uniform physical properties by blending a flammable resin with a halogen-containing polymer, an antimony compound, and a reinforcing filler such as talc or mica has been proposed. ing.
JP 58-65753 A (Claims) JP-A-62-207357 (Claims)

  However, the thermoplastic resin composition described in Patent Document 1 is not sufficient in terms of low warpage of a molded product necessary for case parts for electrical and electronic applications, while having high tracking resistance. there were. Moreover, the flame-retardant resin composition described in Patent Document 2 was insufficient in low warpage of a molded product necessary for a case part for electric / electronic use as in Patent Document 1.

  The inventors of the present invention have completed the present invention as a result of sincere studies to solve the problems of the prior art. That is, an object of the present invention is to obtain a polyester resin composition suitable for a withstand voltage component having a balance between high flame retardancy, tracking resistance, and low warpage.

  Accordingly, the present inventors have studied to achieve both good flame retardancy, tracking resistance, and high low warpage without impairing the original properties of the above polyester resin. As a result, ABS resin, bromine are added to thermoplastic polyester resin. It has been found that the above-mentioned object can be achieved by adding a fluorinated epoxy compound, an antimony compound, glass fiber, talc and mica, and the present invention has been achieved.

  That is, the present invention is based on the assumption that the total of (A) thermoplastic polyester resin, (B) ABS resin, (C) brominated epoxy compound, (D) antimony compound, and (E) glass fiber is 100% by weight. 30 to 50% by weight of plastic polyester resin, (B) 10 to 30% by weight of ABS resin, (C) 10 to 20% by weight of brominated epoxy compound, (D) 1 to 10% by weight of antimony compound, (E) glass fiber 10 A composition comprising -30% by weight, wherein (F) volume average particle diameter is 1 with respect to a total of 100 parts by weight of (A), (B), (C), (D) and (E). It is a thermoplastic resin composition obtained by adding 5 to 20 parts by weight of talc, which is 10 μm, and (G) 5 to 20 parts by weight of mica having a volume average particle diameter of 10 to 60 μm.

  As described above, the thermoplastic resin composition of the present invention is a resin composition excellent in flame retardancy, tracking resistance, low warpage, and mechanical properties. It can be used for cases, covers, electrical parts, etc.

  The present invention will be described in detail below. In the present invention, “weight” means “mass”.

  The composition of the present invention comprises (A) a thermoplastic polyester resin, (B) an ABS resin, (C) a brominated epoxy compound, (D) an antimony compound, and (E) a composition comprising glass fibers (F ) Talc and (G) mica.

  The thermoplastic polyester resin (A) used in the present invention is a polymer or co-polymer obtained by a polycondensation reaction mainly comprising a dicarboxylic acid (or an ester-forming derivative thereof) and a diol (or an ester-forming derivative thereof). Polymers can be used.

  Examples of the dicarboxylic acid include terephthalic acid, isophthalic acid, orthophthalic acid, 1,5-naphthalenedicarboxylic acid, 2,5-naphthalenedicarboxylic acid, 2,6-naphthalenedicarboxylic acid, 2,2 ″ -biphenyldicarboxylic acid, 3,3 '-Biphenyl dicarboxylic acid, 4,4'-biphenyl dicarboxylic acid, 4,4'-diphenyl ether dicarboxylic acid, 4,4'-diphenylmethane dicarboxylic acid, 4,4'-diphenylsulfone dicarboxylic acid, 4,4'-diphenyl isopropyl Redene dicarboxylic acid, 1,2-bis (phenoxy) ethane-4,4'-dicarboxylic acid, 2,5-anthracene dicarboxylic acid, 2,6-anthracene dicarboxylic acid, 4,4'-p-terphenylene dicarboxylic acid, 2,5-pyridinedicarboxylic acid and the like, terephthalic acid It can be preferably used.

  These dicarboxylic acids may be used by mixing two types of abnormalities. In addition, it is possible to use a mixture of one or more alicyclic dicarboxylic acids such as adipic acid, azelaic acid, dodecanedioic acid, sebacic acid and the like, and cyclohexanedicarboxylic acid together with these dicarboxylic acids in a small amount. it can.

  Examples of the diol component include ethylene glycol, propylene glycol, butylene glycol, hexylene glycol, neopentyl glycol, 2-methyl 1,3-propanediol, diethylene glycol, triethylene glycol and other aliphatic diols, 1,4-cyclohexane. Examples thereof include alicyclic diols such as dimethanol, and mixtures thereof. If the amount is small, one or more long-chain diols having a molecular weight of 400 to 6,000, that is, polyethylene glycol, poly-1,3-propylene glycol, polytetramethylene glycol, and the like may be copolymerized.

Preferred examples of these polymers or copolymers include polyethylene terephthalate, polypropylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polybutylene naphthalate, polyethylene-1,2-bis (phenoxy) ethane-4,4'- In addition to dicarboxylate, there may be mentioned copolyesters such as polyethylene isophthalate / terephthalate, polybutylene terephthalate / isophthalate, polybutylene terephthalate / decane dicarboxylate. Of these, polybutylene terephthalate can be preferably used. These thermoplastic polyester resins preferably have a relative viscosity in the range of 1.2 to 2.0 when measured with a 0.5% o-chlorophenol solution at 25 ° C. Within the above range, a composition having excellent mechanical properties and excellent moldability can be obtained.
The blending amount of (A) thermoplastic polyester resin is 100 weights total of (A) thermoplastic polyester resin, (B) ABS resin, (C) brominated epoxy compound, (D) antimony compound, and (E) glass fiber. %, 30 to 50% by weight, particularly 20 to 40% by weight is preferable. If less than 30% by weight, the impact improvement effect is poor, and if it exceeds 50% by weight, the moldability, flame retardancy and warpage are impaired. It is not preferable.

  (B) ABS resin used in the present invention includes diene rubber (ii), vinyl cyanide monomer (ii), aromatic vinyl monomer (iii) and other copolymerizable monomers if necessary. A resin composition comprising a graft copolymer consisting of a monomer (d), wherein the total amount of the monomer is graft copolymerized with the diene rubber (a), and a copolymer copolymerized with the remaining monomers. is there.

Examples of the diene rubber (A) used in the present invention include polybutadiene rubber, acrylonitrile-butadiene copolymer rubber, styrene-butadiene copolymer rubber, polyisoprene rubber, and the like. Can be used together. In the present invention, polybutadiene and / or styrene-butadiene copolymer rubber is preferably used.
Examples of the vinyl cyanide monomer (b) include acrylonitrile and methacrylonitrile, with acrylonitrile being preferred.

  Examples of the aromatic vinyl monomer (c) include styrene, α-methylstyrene, p-methylstyrene, and pt-butylstyrene. Of these, styrene and / or α-methylstyrene is preferably used.

  Examples of other copolymerizable monomers (d) include α, β-unsaturated carboxylic acids such as acrylic acid and methacrylic acid, methyl methacrylate, ethyl methacrylate, tert-butyl methacrylate, and cyclohexyl methacrylate. Examples include α, β-unsaturated carboxylic acid esters, imide compounds of α, β-unsaturated dicarboxylic acid such as maleic anhydride and itaconic anhydride.

The composition ratio of (B) ABS resin is not particularly limited, but diene rubber (ii) 5 with respect to the whole ABS resin from the viewpoint of molding processability and impact resistance of the resulting thermoplastic resin composition. -85 weight% is preferable, More preferably, 15-75 weight% is preferable. Similarly, the vinyl cyanide (B) is preferably 5 to 50% by weight, particularly preferably 8 to 40% by weight. About aromatic vinyl (c), 10 to 90 weight% is preferable and 17 to 77 weight% is especially preferable.
(B) The blending amount of the ABS resin is preferably 10 to 30% by weight, more preferably 12 to 27% by weight, particularly preferably 15 to 25% by weight, where the total of the above (A) to (E) is 100% by weight. If it is less than 10% by weight, the impact improving effect is poor, and if it exceeds 30% by weight, the moldability, flame retardancy and warpage are impaired, which is not preferable.

  (B) There is no restriction | limiting in particular about the manufacturing method of ABS resin, Generally well-known methods, such as block polymerization, solution polymerization, block suspension polymerization, suspension polymerization, and emulsion polymerization, are used. It is also possible to obtain the above composition by blending separately (grafted) copolymerized resins.

  As the (C) brominated epoxy compound used in the present invention, it is necessary to use a brominated epoxy having a molecular weight of 2000 to 7000. Thereby, flame retardancy can be imparted without impairing fluidity. (C) Specific examples of brominated epoxy compounds include tetrabromobisphenol A-tetrabromobisphenol A / diglycidyl ether copolymer, tribromophenol-tetrabromobisphenol A-tetrabromobisphenol A / diglycidyl ether copolymer, and the like. Yes, and preferably endblocked with tribromophenol, such as tribromophenol-tetrabromobisphenol A-tetrabromobisphenol A.diglycidyl ether copolymer. This is because the viscosity of the resin may increase due to the epoxy terminal of the brominated epoxy. In addition, by using those end-capped with tribromophenol, it is possible to reduce the amount of flame retardant added for imparting flame retardancy, and it is expected to improve mechanical properties and impact properties.

  (C) The amount of the brominated epoxy is 10 to 20% by weight, preferably 11 to 19% by weight, more preferably 12 to 18% by weight, where the total of the above (A) to (E) is 100% by weight. It is. The amount required to develop flame retardancy varies depending on the amount of thermoplastic polyester resin, but if it is less than 10% by weight, sufficient combustibility cannot be exhibited. On the other hand, if the blending amount exceeds 20% by weight, the tensile elongation is remarkably lowered.

  As the antimony compound (D) used in the present invention, it is possible to synergistically improve the flame retardancy by using in combination with an organic bromine compound. Antimony trioxide, antimony pentoxide, sodium antimonate and phosphoric acid Antimony compounds such as antimony are exemplified, and antimony compounds that have been surface-treated can also be used. Of these, antimony trioxide is suitable.

  (D) The compounding quantity of an antimony compound is 1-10 weight% by making the sum total of said (A)-(E) 100 weight%, More preferably, it is 3-8 weight%. If it is less than 1% by weight, sufficient combustibility cannot be exhibited. On the other hand, when the blending amount exceeds 10% by weight, the tensile elongation is remarkably lowered.

  As the glass fiber (E) used in the present invention, a known glass fiber can be used. Although it does not specifically limit as a fiber diameter, 9-15 micrometers is preferable. Specific examples include T-120, T-187, T-187H manufactured by Nippon Electric Glass Co., Ltd. (E) The compounding quantity of glass fiber is 10 to 30 weight%, Preferably it is 12 to 28 weight%, More preferably, it is 15 to 25 weight%. By adding glass fiber, sufficient rigidity can be expressed. On the other hand, when the blending amount exceeds 30% by weight, the specific gravity increases, which is not preferable.

  As (F) talc used in the present invention, it is necessary to use a talc having a volume average particle diameter of 1 to 10 μm in the measurement by the laser diffraction method. When the volume average particle diameter is less than 1 μm, sufficient low warpage cannot be obtained. Further, if the volume average particle diameter exceeds 10 μm, sufficient tensile elongation cannot be obtained. The (F) talc used in the present invention can be subjected to a surface treatment with a silane coupling agent, a titanium coupling agent or the like, if necessary.

  As (G) mica used in the present invention, it is necessary to use one having a volume average particle diameter of 10 to 60 μm in the measurement by the laser diffraction method. If the volume average particle diameter is less than 10 μm, sufficient low warpage cannot be obtained. If the volume average particle diameter exceeds 60 μm, sufficient tensile elongation cannot be obtained. The (G) mica in the present invention may be subjected to a surface treatment such as a silane coupling agent, an epoxy compound, or an ionization treatment as necessary.

  The polyester-based resin composition of the present invention includes ordinary additives such as antioxidants, stabilizers, ultraviolet absorbers, colorants, mold release agents, and small amounts of other types of polymers within a range that does not impair the effects of the present invention. Can be added.

  In the present invention, in addition to glass fiber, talc and mica, a reinforcing material and a filler can be added as long as the object of the present invention is not impaired. Examples of these include carbon fiber, asbestos fiber, rock wool, calcium carbonate, silica sand, bentonite, kaolin, clay, wollastonite, barium sulfate, and glass beads.

  Examples of antioxidants include 2,6-di-t-butyl-4-methylphenol, tetrakis (methylene-3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate) methane, tris Phenol compounds such as (3,5-di-t-butyl-4-hydroxybenzyl) isocyanurate, sulfur such as dilauryl-3,3′-thiodipropionate, dimyristyl-3,3′-thiodipropionate And phosphorous compounds such as trisnonylphenyl phosphite and distearyl pentaerythritol diphosphite.

  Stabilizers include benzotriazole compounds including 2- (2′-hydroxy-5′-methylphenyl) benzotriazole, and benzophenone compounds such as 2,4-dihydroxybenzophenone, mono- or distearyl phosphate, trimethyl phosphate And phosphoric acid esters.

  These various additives may have a synergistic effect by combining two or more kinds, and may be used in combination.

  For example, the additive exemplified as the antioxidant may act as a stabilizer or an ultraviolet absorber. Some of those exemplified as stabilizers also have an antioxidant action and an ultraviolet absorption action. In other words, the classification is for convenience and does not limit the action.

Release agents include plant waxes such as carnauba wax and rice wax, animal waxes such as beeswax and lanolin, mineral waxes such as montan wax, petroleum waxes such as paraffin wax and polyethylene wax, castor oil and its Derivatives, fatty acids and oil-based waxes such as derivatives thereof, and higher fatty acid derivatives include higher fatty acids such as lauric acid, myristic acid, palmitic acid, stearic acid, montanic acid and monohydric or dihydric or higher alcohols. Esters, partial saponification of these higher fatty acid esters partially with metal oxides such as Ca (OH) ₂ , NaOH, Mg (OH) ₂ , Zn (OH) ₂ , LiOH, Al (OH) ₃ Saponification obtained from esterified esters, higher fatty acids and metal oxides or metal hydroxides Products, higher fatty acids and polyhydric alcohol esters, which are condensed with a dicarboxylic acid such as adipic acid as a binder, mono- or diamides obtained from higher fatty acids and monoamines or diamines.

  As other types of polymers, polycarbonate resin, nylon resin, PPS resin, polytetrafluoroethylene, and the like can be added.

  What is necessary is just to implement about the manufacturing method of the polyester-type resin composition of this invention by the method generally known, and does not need to specifically limit. A typical example is a method of melt-kneading at a temperature of 200 to 350 ° C. using a known melt mixer such as a single-screw or twin-screw extruder, a Banbury mixer, a kneader, or a mixing roll. Each component may be mixed in advance and then melt kneaded. Alternatively, with respect to 100 parts by weight of the total amount of (A) to (G), for a small amount of additive component such as 1 part by weight or less, the other components are kneaded and pelletized by the above method or the like, and then molded. It can also be added before. In addition, although it is better that the water | moisture content adhering to each component is less and it is desirable to dry beforehand, not all the components need to be dried.

  The resin composition of the present invention is generally molded by a known thermoplastic resin molding method such as injection molding, extrusion molding, blow molding, transfer molding, vacuum molding, etc., among which injection molding is preferable.

  The polyester-based resin composition of the present invention is a resin composition excellent in flame retardancy, tracking resistance and low warpage. Taking advantage of such properties, cases, covers, fixing machine parts are used as electrical and electronic parts. It can be used for electrical parts.

  Hereinafter, the present invention will be described in more detail with reference to examples. The evaluation method of an Example and a comparative example is shown below.

(I) Flame retardance A rod-shaped test piece (125.0 × 13.0 × 0.75 mm thickness) was used. After molding, it was allowed to stand for 24 hours in an environment of 23 ° C. and 50% RH, and then measured according to UL94. Ten tests were performed, and a determination was made according to UL94.

(II) Inner warp amount A box-shaped molded product having a width of 30 mm, a height of 30 mm, a depth of 30 mm, and a thickness of 1.5 mm was molded from the side pin gate and left for 24 hours in a 23%, 50% RH environment. The amount of inclining of the surface to the inner side on the anti-gate side was measured five times with a three-dimensional dimension measuring machine manufactured by Mitutoyo, and the average was taken as the amount of internal warpage.

(III) Tracking resistance A comparative tracking index was measured in accordance with the International Electrotechnical Commission (IEC) using a square plate molded product (80 × 80 × 3 mm thickness).

(IV) Tensile properties Using a test piece prepared in advance according to ASTM D638 (using a test piece of ASTM No. 1 having a length of 217 mm, a width of a parallel part of 12.7 mm, and a thickness of 3.2 mm), 23 ° C., 50% after molding The measurement was carried out after 24 hours in an RH environment. The testing machine used was “Autograph UTM-5T” manufactured by Shimadzu Corporation, and the tensile speed was 10 mm / min. The test was carried out five times and the tensile strength was determined by averaging the individual values.

Examples 1-10
Using the following materials, materials are added according to the combinations shown in Table 1, and extruded using a twin screw extruder with a screw diameter of 57 mmΦ at a barrel set temperature of 260 ° C. and a screw rotation speed of 200 rpm to produce resin composition pellets. did.
(A) Polybutylene terephthalate resin Inherent viscosity 0.85
PBT resin “Toraycon” 1100S manufactured by Toray Industries, Inc.
(B) ABS resin ABS resin “Toyolac” MPVX manufactured by Toray Industries, Inc.
(C) Brominated epoxy compound “Plasarm” ECX-30 manufactured by Dainippon Ink & Chemicals, Inc.
(D) Antimony compound "Fire cut AT-3" manufactured by Suzuhiro Chemical Co., Ltd.
(E) Glass fiber “3J948” manufactured by Nittobo Co., Ltd. (average fiber length: 3.0 mm, average fiber diameter: 10 μm)
(F-1) Talc “LMS-300” manufactured by Fuji Talc Kogyo Co., Ltd. (volume average particle diameter: 4.5 μm)
(F-2) Talc “NK-64” manufactured by Fuji Talc Kogyo Co., Ltd. (volume average particle diameter: 19.0 μm)
(G-1) Mica “A-21” manufactured by Yamaguchi Mica Co., Ltd. (volume average particle diameter: 22.5 μm)
(G-2) Mica “A-11” manufactured by Yamaguchi Mica Co., Ltd. (volume average particle diameter: 5.2 μm)
(G-3) Mica “A-61” (volume average particle diameter: 75.0 μm) manufactured by Yamaguchi Mica Co., Ltd.

  From the obtained pellets, test pieces for measuring various physical properties were injection molded under the conditions of a cylinder temperature of 260 ° C. and a mold temperature of 80 ° C., and the above test was performed. The results are shown in Table 1. All of the obtained compositions were materials having high flame retardancy, tracking resistance, low warpage, and tensile strength.

Comparative Examples 1-20
Pellets were produced in the same manner as in Example 1 except that each component composition was changed as shown in Table 2. From the pellets, test pieces for measuring various physical properties were injection molded from the pellets under the conditions of a cylinder temperature of 260 ° C. and a mold temperature of 80 ° C., and the test was performed in the same manner as in Example 1. The results are shown in Table 2 and Table 3.

  Comparative Example 1 in which (A) a large amount of polybutylene terephthalate resin and (B) a small amount of ABS resin were added exhibited sufficient combustibility and tensile strength, but low warpage and tracking resistance were not sufficient.

  In Comparative Example 2 in which (A) a small amount of polybutylene terephthalate resin and (B) a large amount of ABS resin are added, the combustibility, low warpage, and tracking resistance are sufficiently expressed, but the tensile strength is not sufficient.

  (C) In Comparative Example 3 in which a large amount of brominated epoxy compound was added, combustibility and low warpage were sufficiently expressed, but tracking resistance and tensile strength were not sufficient.

  In Comparative Example 4 in which (C) less brominated epoxy compound (D) and more antimony compound was added, low warpage and tracking resistance were sufficiently expressed, but flame retardancy and tensile strength were not sufficient.

  (E) Although the comparative example 5 which added many glass fibers has fully expressed flame retardancy, tracking resistance, and tensile strength, low warpage property is not enough.

  (E) In Comparative Example 6 in which a small amount of glass fiber is added, low warpage is sufficiently exhibited, but flame retardancy, tracking resistance and tensile strength are not sufficient. (F-1) In Comparative Example 7 in which a large amount of talc is added, flame retardancy, low warpage, and tracking resistance are sufficiently expressed, but the tensile strength is not sufficient.

(F-1) Comparative Example 8 added with a small amount of talc shows sufficient flame retardancy and tensile strength but low warpage and tracking resistance is not sufficient (G-1) Comparison added with a large amount of mica In Example 9, flame retardancy, low warpage, and tracking resistance are sufficiently exhibited, but tensile strength is not sufficient. (G-1) Comparative Example 10 to which a small amount of mica was added exhibited sufficient flame retardancy, tracking resistance, and tensile strength, but low warpage was not sufficient.

  (A) In Comparative Example 11 in which no polybutylene terephthalate is added, flame retardancy, low warpage and tracking resistance are sufficiently exhibited, but tensile strength is not sufficient.

  (B) In Comparative Example 12 to which no ABS is added, flame retardancy and tensile strength are sufficiently exhibited, but low warpage and tracking resistance are not sufficient. (C) In Comparative Example 13 in which no brominated epoxy compound is added, low warpage, tracking resistance, and tensile strength are sufficiently expressed, but flame retardancy is not sufficient.

  (D) In Comparative Example 14 to which no antimony compound is added, low warpage, tracking resistance, and tensile strength are sufficiently expressed, but flame retardancy is not sufficient. (E) In Comparative Example 15 in which no glass fiber is added, low warpage is sufficiently exhibited, but flame retardancy, tracking resistance and tensile strength are not sufficient. (F-1) In Comparative Example 16 in which talc is not added, flame retardancy and tensile strength are sufficiently exhibited, but low warpage and tracking resistance are not sufficient. (G-1) In Comparative Example 17 in which mica is not added, flame retardancy, tracking resistance and tensile strength are sufficiently expressed, but low warpage is not sufficient.

  (F-1) Comparative Example 18 in which talc was added instead of (F-2) talc had sufficient flame retardancy, low warpage and tracking resistance, but tensile strength Not enough.

  (G-1) Comparative Example 19 with a small volume average particle diameter added instead of mica (G-2) Mica has sufficiently exhibited flame retardancy, tracking resistance and tensile strength, but low warpage Sex is not enough.

  (G-1) Comparative Example 20 in which mica is added instead of mica (G-3) has good flame resistance, low warpage, and tracking resistance, but tensile strength is high. Not enough.

Claims (2)

  The total of (A) thermoplastic polyester resin, (B) ABS resin, (C) brominated epoxy compound, (D) antimony compound and (E) glass fiber is 100% by weight, and (A) thermoplastic polyester resin 30- 50% by weight, (B) ABS resin 10-30% by weight, (C) brominated epoxy compound 10-20% by weight, (D) antimony compound 1-10% by weight, (E) glass fiber 10-30% by weight A talc having a volume average particle diameter of 1 to 10 μm with respect to a total of 100 parts by weight of the above (A), (B), (C), (D) and (E). A thermoplastic resin composition comprising 5 to 20 parts by weight and (G) 5 to 20 parts by weight of mica having a volume average particle diameter of 10 to 60 μm.   (A) The thermoplastic resin composition according to claim 1, wherein the thermoplastic polyester resin is polybutylene terephthalate.