JP2002322349A - Flame-retarded polyester resin composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a flame-retarded polyester resin composition which can give a molding that is excellent in the prevention of dripping on burning, has no foreign matters such as agglomerates, has good surface appearance, and is superior in various physical properties. SOLUTION: This resin composition incorporates, in 100 pts.wt. of a thermoplastic polyester resin, 3-50 pts.wt. of a bromine-based aromatic compound, 1-30 pts.wt. of an antimony oxide compound, 0.5-10 pts.wt. of a resin composition consisting of a polytetrafluoroethylene and a 5-30C alkyl(metha)acrylate-based resin, and 5-90 pts.wt. of an inorganic filler.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a flame-retardant polyester resin composition. More specifically, the present invention relates to a flame-retardant polyester resin composition which is excellent in preventing dripping at the time of combustion and which can provide a molded article having a good surface appearance without foreign substances and aggregates.

[0002]

2. Description of the Related Art Flame-retardant polyester resins are excellent in mechanical strength, chemical resistance, electric insulation, and the like, and are widely used in electric and electronic parts, automobile parts, other electric parts, and mechanical parts. In recent years, electrical and electronic components and electrical components have tended to become smaller and lighter in various types of equipment.
It is necessary that the molding resin material has excellent fluidity.

In many cases, such molded articles are required to have a flame retardancy corresponding to the thinnest part, and the flame retardancy is a flame retardancy of grade V-0 specified in UL-94. Is done. According to this standard, ignition occurs when the flame of a gas burner approaches a strip-shaped test piece. However, the fire extinguishes after the flame is separated, and the burning material drops during flame contact (drip).
In general, as the thickness of the molded product becomes thinner, it becomes more difficult to achieve flame retardancy that passes the grade V-0.

It is known that it is effective to add polytetrafluoroethylene to a base resin in order to prevent drip during flame contact. However, polytetrafluoroethylene has poor compatibility with general thermoplastic resins containing no halogen atom, and has poor dispersibility, and is described in JP-A-5-214184 and JP-A-6-306212. As described above, there is a disadvantage that uniform blending cannot be achieved by simply blending, and the surface appearance of a molded article is significantly reduced. Also, according to the method described in Japanese Patent Application Laid-Open No. 7-324147, it is difficult to uniformly fiberize all polytetrafluoroethylene by shearing force, and even if the fiberization can be achieved, the fiber is uniformly dispersed in the base resin. It is difficult to make it coagulate, and there is a drawback of aggregation.

[0005] In any of the above methods, there is a problem in the dispersibility of polytetrafluoroethylene in the polyolefin resin, and in order to exhibit the useful property of preventing drip during the above-mentioned flame contact, a large amount of polytetrafluoroethylene is required. In addition to the necessity of blending polytetrafluoroethylene, there are drawbacks in that polytetrafluoroethylene aggregates impair the surface appearance of the molded article.

[0006]

DISCLOSURE OF THE INVENTION The inventors of the present invention have good strength, rigidity, heat resistance, fluidity and impact resistance which are inherent properties of a polyester resin, have no agglomerates, and have excellent surface appearance. To provide a flame-retardant polyester resin composition that can provide a molded article that is excellent in flame retardancy and has no drip particularly during combustion, and as a result of preventing dripping during combustion of the base resin. When compounded as a resin composition comprising polytetrafluoroethylene and an alkyl (meth) acrylate resin in the form of fine particles, it can be uniformly dispersed in the base resin, is less likely to generate aggregates, and has excellent surface appearance. The inventors have found that a product can be obtained, and have reached the present invention.

[0007]

Means for Solving the Problems To solve the above problems, the present invention provides a thermoplastic polyester resin {component (A)}.
100 parts by weight of the brominated aromatic compound {(B) component # 3 to 5
0 parts by weight, oxidized ammonium compound {(C) component # 1-30
Parts by weight, polytetrafluoroethylene and 5 to 30 carbon atoms
A resin composition comprising an alkyl (meth) acrylate-based resin of {(D) component｝ 0.5 to 10 parts by weight and an inorganic filler {(E) component｝ 5 to 90 parts by weight. The invention provides a flame-retardant polyester resin composition characterized by the following.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.
In the present invention, the thermoplastic polyester resin ｛or less,
The こ と が which may be described as the component (A) refers to a conventionally known aromatic polyester resin. The aromatic polyester-based resin is a polyester having an aromatic ring in a chain unit of a polymer, and is mainly composed of an aromatic dicarboxylic acid and a diol (and an ester-forming derivative thereof), and is obtained by a polycondensation reaction. Copolymers and copolymers are exemplified.

The aromatic dicarboxylic acids include terephthalic acid, isophthalic acid, orthophthalic acid, 1,5-naphthalenedicarboxylic acid, 2,5-naphthalenedicarboxylic acid,
2,6-naphthalenedicarboxylic acid, biphenyl-2,2
'-Dicarboxylic acid, biphenyl-3,3'dicarboxylic acid, biphenyl-4,4'-dicarboxylic acid, diphenylether-4,4'-dicarboxylic acid, diphenylmethane-4,4, -dicarboxylic acid, diphenylsulfone-
4,4'-dicarboxylic acid, diphenylisopropylidene-4,4'-dicarboxylic acid, 1,2-bis (phenoxy) ethane-4,4'-dicarboxylic acid, anthracene-
Examples thereof include 2,5-dicarboxylic acid, anthracene-2,6-dicarboxylic acid, p-terphenylene-4,4′-dicarboxylic acid, and pyridine-2,5-dicarboxylic acid. Of these, terephthalic acid is particularly preferred.

These aromatic dicarboxylic acids can be used as a mixture of two or more kinds. If the amount is small, one or more alicyclic dicarboxylic acids such as adipic acid, azelaic acid, dodecanedioic acid and sebacic acid can be used in combination with these aromatic dicarboxylic acids.

The diol component includes aliphatic diols such as ethylene glycol, propylene glycol, butylene glycol, hexylene glycol, neopentyl glycol, 2-methylpropane-1,3-diol, diethylene glycol and triethylene glycol, and cyclohexane-1. And alicyclic diols such as 4,4-dimethanol, and mixtures thereof. In addition,
If the amount is small, the long-chain diol having a molecular weight of 400 to 6,000, that is, polyethylene glycol, poly-1,3
-One or more kinds of propylene glycol, polytetramethylene glycol and the like can be copolymerized.

Specific examples of the component (A) include polyethylene terephthalate, polypropylene terephthalate, polybutylene terephthalate, polyethylene naphthalate,
Polybutene naphthalate, polyethylene-1,2-bis (phenoxy) ethane-4,4'-dicarboxylate, polycyclohexanedimethanol terephthalate and the like can be mentioned. Further, the polymerization components of these thermoplastic polyester resins include isophthalic acid, decanedicarboxylic acid, 4,4′-isopropylidene-bis [(2,6-dibromophenoxy) ethoxy-2-ethanol], 4,4
'-Isopropylidene-bis [(2,6-dibromophenoxy) ethanol], 4,4'-isopropylidene-bis (phenoxyethoxy-2-ethanol), -4,4
'-Isopropylidene-bis (phenoxyethanol)
And a thermoplastic polyester resin obtained by copolymerizing such a monomer. Among them, particularly preferred is polybutylene terephthalate.

When the component (A) is polybutylene terephthalate, the intrinsic viscosity of polybutylene terephthalate is
Preferably it is 0.5 to 1.2 dl / g, more preferably 0.6 to 1.0 dl / g. In addition, the intrinsic viscosity is obtained by mixing phenol and 1,1,2,2-tetrachloroethane,
This is a value measured by dissolving a sample in a mixed solvent mixed at a weight ratio of 1: 1 and using a Ubbelohde viscometer at a temperature of 30 ° C.

In the present invention, a bromine-based aromatic compound (hereinafter sometimes referred to as component (B)) refers to a compound usually used as a brominated flame retardant. In particular,
For example, an epoxy oligomer of tetrabromobisphenol A, pentabromobenzyl polyacrylate, polybromophenyl ether, brominated polystyrene, brominated epoxy resin, brominated imide resin, brominated polycarbonate and the like can be mentioned. The compounding amount of the component (B) is 3 to 50 parts by weight based on 100 parts by weight of the component (A). If the blending amount of the component (B) is less than 3 parts by weight, the flame retardant effect is insufficient, and if it exceeds 50 parts by weight, the mechanical strength decreases, and the thermal stability during melting tends to decrease. Is also not preferred. The preferred amount of the component (B) is 100 parts of the component (A).
The amount is 5 to 40 parts by weight, particularly preferably 6 to 30 parts by weight based on parts by weight.

In the present invention, an antimony compound (hereinafter sometimes referred to as component (C)) refers to antimony oxide or antimonate. Specifically, antimony trioxide (Sb ₂ O ₃ ), antimony tetroxide (Sb ₂ O ₄ ), antimony pentoxide (Sb ₂ O ₅ ), sodium antimonate, and the like can be given. The amount of component (C) is (A) component 1
It is 1 to 30 parts by weight with respect to 00 parts by weight. When the compounding amount of the component (C) is less than 1 part by weight, the flame retardant effect is insufficient, and when it exceeds 30 parts by weight, the thermal stability at the time of melting, the mechanical strength, and the like are liable to decrease, and both are preferable. Absent. The preferred amount of component (C) is 2 parts by weight per 100 parts by weight of component (A).
To 25 parts by weight, particularly preferably 3 to 20 parts by weight.

In the present invention, a resin composition comprising polytetrafluoroethylene and an alkyl (meth) acrylate resin having 5 to 30 carbon atoms (hereinafter sometimes referred to as component (D)) means particles Diameter 0.05-1.0μ
m polytetrafluoroethylene {hereinafter, sometimes referred to as component (d1)} Aqueous particle dispersion and 5 to 30 carbon atoms
Alkyl (meth) acrylate resin of the following. Hereinafter, it may be described as the component (d2). After mixing with the aqueous particle dispersion, coagulation or spray drying is carried out to obtain the first production method (D1). Or a particle size of 0.05 to
In a dispersion obtained by mixing an aqueous dispersion of 1.0 μm polytetrafluoroethylene (d1) particles and an aqueous dispersion of alkyl (meth) acrylate resin (d2) particles having 5 to 30 carbon atoms, ethylenically unsaturated It refers to one obtained by the first production method (D2) in which a monomer having a bond is polymerized and then solidified or spray-dried to obtain a powder.

In the component (D), the polytetrafluoroethylene {(d1) component} refers to a monomer obtained by polymerizing a monomer containing tetrafluoroethylene as a main component by a conventionally known polymerization method. The component (d1) functions to give the flame-retardant polyester resin composition a property that makes it difficult to drip when burned. Component (d1) includes, as long as the properties of component (d1) are not impaired, as a copolymer component, a fluorinated olefin such as hexafluoropropylene, chlorotrifluoroethylene, fluoroalkylethylene, or perfluoroalkylvinyl ether; Fluorine-containing alkyl (meth) such as alkyl vinyl (meth) acrylate
An acrylate can be included. The content of the copolymer component is preferably set to 10% by weight or less based on tetrafluoroethylene.

The polytetrafluoroethylene (d1) constituting the component (D) has a particle diameter (weight average) of 0.05 to 1.0.
It is preferably an aqueous dispersion of particles in the range of 0 μm. Particles having a particle diameter of 0.05 μm are difficult to prepare, and particles having a particle diameter of 1.0 μm deteriorate the appearance of a molded article, and are not preferred.

The aqueous dispersion of polytetrafluoroethylene (d1) particles can be produced by polymerizing a monomer containing tetrafluoroethylene (d1) as a main component by an emulsion polymerization method. Polytetrafluoroethylene (d1) particle dispersions are commercially available, Fluon AD-1 and AD-936 manufactured by Asahi ICI Fluoropolymer Co., Ltd., and Polyflon D-1 and D72 manufactured by Daikin Industries, and manufactured by DuPont-Mitsui Fluorochemical Co., Ltd. Teflon 30J is available.

The alkyl (meth) acrylate resin {(d
2) Component い う refers to a component obtained by polymerizing a monomer containing an alkyl (meth) acrylate having 5 to 30 carbon atoms by a radical polymerization method or an ionic polymerization method. (d
The component (2) functions to uniformly disperse the component (d1) in the component (A). Specific examples of the alkyl (meth) acrylate having 5 to 30 carbon atoms include cyclohexyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, nonyl (meth) acrylate, dodecyl (meth) acrylate, tridecyl (meth) acrylate, and octadecyl. (Meth) acrylate, isobornyl (meth) acrylate and the like can be mentioned. These monomers may be used alone or as a mixture of two or more kinds.
May be copolymerized with another monomer copolymerizable with the alkyl (meth) acrylate.

Other copolymerizable monomers include styrene, p-methylstyrene, o-methylstyrene, p-chlorostyrene, o-chlorostyrene, p-methoxystyrene, o-methoxystyrene, 2,4 Styrene monomers such as dimethylstyrene and α-methylstyrene, and alkyl (meth) acrylate monomers having 1 to 4 carbon atoms such as methyl (meth) acrylate, ethyl (meth) acrylate and butyl (meth) acrylate , Vinyl cyanide monomers such as acrylonitrile and methacrylonitrile, vinyl ether monomers such as vinyl methyl ether and vinyl ethyl ether, and vinyl carboxylate monomers such as vinyl acetate and vinyl butyrate , Ethylene, propylene, olefinic monomers such as isobutylene,
Diene monomers such as butadiene, isoprene and dimethylbutadiene are exemplified. These other monomers may be used alone or as a mixture of two or more.

The aqueous dispersion of the alkyl (meth) acrylate resin (d2) particles having 5 to 30 carbon atoms has the above-mentioned 5 to 3 carbon atoms.
It can be easily produced by polymerizing a monomer containing 0 alkyl (meth) acrylate by a conventionally known emulsion polymerization method or miniemulsion polymerization method.

The alkyl (meth) acrylate resin (d2) having 5 to 30 carbon atoms constituting the component (D) is an aqueous particle dispersion having a particle diameter (weight average) of 0.03 to 1 μm. Is preferred. If the particle diameter is less than 0.03 μm, it is difficult to manufacture, and if the particle diameter exceeds 1 μm, the dispersibility of polytetrafluoroethylene (d1) decreases, and the surface appearance of a molded article obtained from the resin composition is reduced. Inferior.

The component (D) comprises the above-mentioned polytetrafluoroethylene (d1) and the above-mentioned alkyl (meth) acrylate resin.
(d2), and the ratio of the component (d2) to the component (d1) is preferably 0.2 or more by weight. If the weight ratio of component (d2) / component (d1) is less than 0.2, the dispersibility of polytetrafluoroethylene may be reduced. A particularly preferred weight ratio of the component (d2) / the component (d1) is 0.5 or more.

In order to produce the component (D) by the first production method (D1), the above-mentioned aqueous dispersion of polytetrafluoroethylene (d1) particles and an alkyl (meth) acrylate resin having 5 to 30 carbon atoms ( d2) The aqueous particle dispersion and the (d2) component / (d1) component are each weighed so that the weight ratio thereof is 0.2 or more, mixed to form a mixed dispersion, and the mixed dispersion is coagulated or spray-dried. May be powdered. The coagulation or spray-drying method is not particularly limited, and may be a conventionally known method.

In order to produce the component (D) by the above-mentioned second production method (D2), an ethylenically unsaturated mixture is prepared by mixing the aqueous dispersion of the component (d1) particles and the aqueous dispersion of the component (d2) particles. After polymerizing another monomer having a saturated bond, coagulation or spraying is performed.
What is necessary is just to pulverize by dryness. The monomer having an ethylenically unsaturated bond may be the same as the monomer mentioned when producing the component (d2). These monomers may be used alone or as a mixture of two or more. In order to polymerize a monomer having an ethylenically unsaturated bond, a conventionally known emulsion polymerization method or miniemulsion polymerization method can be used. The method of coagulation or spray drying after the polymerization is not particularly limited, and may be a conventionally known method.

The amount of the component (D) is preferably in the range of 0.5 to 10 parts by weight based on 100 parts by weight of the component (A). If the amount of the component (D) is less than 0.5 part by weight, the effect of the present invention is not exhibited.
Workability such as moldability is impaired, and tensile strength, bending strength, impact strength, etc. are reduced, and all are not preferred. A particularly preferred compounding amount of the component (D) is 0.7 to 9 parts by weight.

In the present invention, the inorganic filler ｛or less, (E)
｝, Which may be described as a component, improves the strength, rigidity, heat resistance and the like of the resin composition. Specific examples of the component (E) include calcium carbonate, titanium oxide, feldspar-based mineral, clay, tricalcium phosphate, zinc borate, white carbon,
Granular or amorphous fillers such as carbon black and glass beads, plate-like fillers such as kaolin, clay, talc, graphite, etc., flaky fillers such as glass flator and mica, glass fiber, carbon fiber, wallast And fibrous fillers such as knight and potassium titanate.

The amount of component (E) is preferably in the range of 5 to 90 parts by weight per 100 parts by weight of component (A).
If the blending amount of the component (E) is less than 5 parts by weight, the rigidity and heat resistance are not sufficient, and if it exceeds 90 parts by weight, the fluidity is reduced, and the mechanical properties are also easily reduced. .
The blending amount of the inorganic filler is the thermoplastic polyester resin 10
With respect to 0 parts by weight, a preferable amount of the component (E) is 6 to
The amount is 80 parts by weight, particularly preferably 7 to 70 parts by weight.

The flame-retardant polyester resin composition according to the present invention may be used for the flame-retardant polyester resin composition in addition to the above four components, as long as the physical properties, fluidity and flame retardancy are not impaired. Accordingly, other thermoplastic resins, various resin additives, and the like can be added. Other thermoplastic resins include polystyrene, AS resin, ABS resin, polymethyl methacrylate, thermoplastic elastomers and the like. Examples of the resin additive include a heat stabilizer, an antioxidant, an ultraviolet absorber, a lubricant, a mold release agent, a crystal nucleating agent, a plasticizer, an antistatic agent, and a coloring agent.

The method for producing the flame-retardant polyester resin composition according to the present invention is not particularly limited. For example, (i) a thermoplastic polyester resin {component (A)}, a bromine-based aromatic compound { (B) component｝, antimony oxide compound {(C) component｝, polytetrafluoroethylene having fibril-forming ability (((D) component｝), inorganic filler ((E) component｝, and other additives as necessary A batch blending method in which the ingredients are mixed, melted and kneaded by a screw type extruder and pelletized.
And (ii) a thermoplastic polyester resin {component (A)}
Is melted and kneaded by a screw type extruder, and other components such as inorganic filler {(E) component｝,
And a split blending method in which other additives are supplied, melted and kneaded as needed, and pelletized.

[0032]

EXAMPLES Hereinafter, the present invention will be described in more detail with reference to examples, but the present invention is not limited to the following examples unless it exceeds the gist.

The following components were used as the components in the examples and comparative examples. (1) Thermoplastic polyester resin: Component (A), polybutylene terephthalate having an intrinsic viscosity of 0.70 (manufactured by Mitsubishi Engineering Plastics Co., Ltd., trade name: Novaduran 5007A, hereinafter referred to as PBT). ) Brominated aromatic compound-1: Brominated polybenzyl acrylate as a component (B) (trade name: PBBPA, manufactured by Bromochem Far East Co.). (3) Brominated aromatic compound-2: brominated epoxy resin as component (B) (SRT-48, manufactured by Sakamoto Yakuhin Co., Ltd.)
It is.

(4) Brominated aromatic compound-3: Brominated polycarbonate (product name: BC-58, manufactured by Great Lakes Co.) as the component (B). (5) Antimony trioxide: component (C) manufactured by Morirokusha. (6) Component (D): containing polytetrafluoroethylene (d1) particles having a weight average particle diameter of 0.3 μm, 70% by weight of dodecyl methacrylate and 30% by weight of methyl methacrylate
(D2) having a weight average particle size of 0.19 μm
m particles, and the weight ratio of component (d2) / component (d1) is 0.3
Resin composition. (7) Polytetrafluoroethylene (PTFE): manufactured by Daikin Industries, trade name: Polyflon FA-500. (8) Inorganic filler: a glass fiber having a diameter of 13 μm, which is the component (E) (manufactured by NEC Corporation, brand name: T-123).

The evaluation test of the resin composition was performed as follows. (a) Tensile strength (Mpa): Measured according to ASTM D-638. (b) Flexural strength (Mpa): Measured according to ASTM D-790. (c) Flexural modulus (Gpa): Measured according to ASTM D-790. (d) Izod impact strength (Mpa): Measured according to ASTM D-256 on a test piece having a thickness of 1/8 inch. (e) Number of foreign substances: A 1/2 inch × 5 inch × 1/64 inch (thickness) test piece manufactured by an injection molding method was visually observed through a fluorescent lamp, and a foreign substance (polytetrafluoroethylene having a size of 500 μm or more) was observed. The number of fluoroethylene aggregates) is counted. It measured about five test pieces and displayed the average value.

(F) Flame retardancy test: Five test pieces were prepared by UL underwriting by Underwriters Laboratories, Inc.
-94 "Combustion test for material classification" (hereinafter UL-9)
According to the test method shown in 4), a test piece having a thickness of 1/32 inch was tested, and based on the results of five test pieces, V-0, V-1 and V-2 of the UL-94 standard were used. Evaluated in any grade. The grading criteria for each V for UL-94 are as follows.

(I) V-0: The average flame holding time after removing the ignition flame is 5 seconds or less, and all the test pieces do not drop a fine flame that ignites absorbent cotton. (ii) V-1: The average flame holding time after removing the ignition flame is 25 seconds or less, and all the test pieces do not drop fine flames that ignite absorbent cotton. (iii) V-2: The average flame holding time after removing the ignition flame is 25 seconds or less, and the cotton wool is ignited from the fine flame dropped from these test pieces.

[Examples 1 to 5 and Comparative Examples 1 to 4] First, the composition of the resin composition and the ratio (parts by weight) of each component are shown in Table-1 (Example) and Table-2. The ratios shown in (Comparative Example) were weighed and mixed by a blender. Next, the obtained mixture was melted and kneaded with a twin-screw extruder (screw diameter: 30 mm) under the conditions of a cylinder set temperature of 250 ° C. and a screw rotation speed of 200 rpm to be pelletized. The pellet was dried for 6 to 8 hours with a dryer set at a temperature of 120 ° C. until immediately before molding of the test piece or the like. Using this dried pellet, an injection molding machine (manufactured by Sumitomo Heavy Industries, model: Nestal SG75-SYCAP-MIII)
Using A), a molded product was obtained at a cylinder temperature of 255 ° C. An evaluation test was performed on the molded article by the method described above. The evaluation results are shown in Tables 1 and 2.

[0039]

[Table 1]

[0040]

[Table 2]

From Tables 1 and 2, the following becomes clear. (1) The flame-retardant polyester resin composition according to the present invention is excellent in flame retardancy, and has excellent strength, rigidity, heat resistance, fluidity and impact resistance inherent to polyester resin, and is a molded article. Has no foreign matter and is excellent in appearance (see Examples 1 to 5). (2) On the other hand, if the compounding amount of the component (D) is more than the essential range in the present invention (0.5 to 10 parts by weight per 100 parts by weight of the component (A)), , But the physical properties are reduced (see Comparative Example 1). On the other hand, if it is less than the above range, V-0 is not achieved (see Comparative Example 2). (3) Further, when the conventional PTFE is blended, foreign matters increase in the molded article, and the appearance of the molded article is deteriorated (see Comparative Examples 3 and 4).

[0042]

[Effect of the Invention] The flame-retardant polyester resin composition according to the present invention has excellent flame retardancy and does not sacrifice the inherent strength, rigidity, heat resistance, fluidity and impact resistance inherent to polyester resins. 2. The flame-retardant polyester resin composition according to the present invention is excellent in flame retardancy, especially in dripping prevention during burning. 3. ADVANTAGE OF THE INVENTION The flame-retardant polyester resin composition which concerns on this invention is excellent in flame retardance, and the molded article of excellent appearance is obtained. 4. The molded article having a thin portion produced from the flame-retardant polyester resin composition according to the present invention has excellent flame retardancy in the thin portion, and is extremely useful as various industrial parts such as electric, electronic, automobile, and machine parts. is there.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C08J 3/12 CEY C08J 3/12 CEY C08K 3/00 C08K 3/00 5/03 5/03 // ( C08L 67/00 C08L 27:18 27:18 33:06 33:06) (72) Inventor Ryo Saito 5-6-1 Higashi-Hachiman, Hiratsuka-shi, Kanagawa Pref. Mitsubishi Engineering Plastics Co., Ltd. Technical Center (72) Inventor Hidekazu Shoji 5-6-1 Higashi-Hachiman, Hiratsuka-shi, Kanagawa F-term in Mitsubishi Engineering-Plastics Co., Ltd. Technical Center 4F070 AA24 AA32 DA34 4J002 BD152 BG042 BG052 CF001 CF041 CF051 CF061 CF071 CF081 DA018 DA028 DA038 DE127 DE DE188 DE238 DH038 DH048 DJ008 DJ018 DJ038 DJ048 DJ058 DK008 DL008 EB136 FA018 FA048 FA088 FD018 FD136 FD137 GM00 GN 00 GQ00 4J011 PA66 PA69 4J026 AA26 AA45 BA27 GA06

Claims (4)

[Claims] 1. A thermoplastic polyester resin {(A) component # 1
The bromine-based aromatic compound {(B) component # 3 to 50 parts by weight
Parts by weight, an ammonium oxide compound {component (C)} 1 to 30 parts by weight, a resin composition comprising polytetrafluoroethylene and an alkyl (meth) acrylate resin having 5 to 30 carbon atoms {component (D)}. A flame-retardant polyester resin composition comprising 5 to 10 parts by weight and an inorganic filler {(E) component} 5 to 90 parts by weight. 2. A thermoplastic polyester resin {component (A)}
The flame-retardant polyester resin composition according to claim 1, wherein is a polybutylene terephthalate. 3. The resin composition {component (D)} has a particle size of 0.0
After mixing an aqueous dispersion of polytetrafluoroethylene (d1) particles of 5 to 1.0 μm and an aqueous dispersion of alkyl (meth) acrylate resin (d2) particles having 5 to 30 carbon atoms, coagulation or spray-drying is performed. The flame-retardant polyester resin composition according to claim 1, which is obtained by pulverizing the polyester resin according to claim 1. 4. The resin composition {component (D)} has a particle diameter of 0.0
In a dispersion obtained by mixing an aqueous dispersion of 5 to 1.0 μm polytetrafluoroethylene (d1) particles and an aqueous dispersion of alkyl (meth) acrylate resin (d2) particles having 5 to 30 carbon atoms, The flame-retardant polyester resin composition according to claim 1 or 2, which is obtained by polymerizing a monomer having an unsaturated bond and then pulverizing the mixture by coagulation or spray drying.