JPS6147745A - Electrically conductive thermoplastic resin composition - Google Patents

Abstract

PURPOSE:To composition, obtained by incorporating a matrix polymer, consisting of a thermoplastic polyester, aromatic polycarbonate, and havig a specific composition with a metallic filler, and having improved moldability, electric conductivity and electromagnetic wave shielding properties. CONSTITUTION:An electrically conductive thermoplastic resin composition obtained by incorporating (A) 5-94pts.wt. thermoplastic polyester which is a homo- or/and copolymer prepared by condensation reaction of an aromatic dicarboxylic acid component (preferably terephthalic acid of isophthalic acid, etc.) with a 2-6C aliphatic glycol component (preferably ethylene glycol, etc.) with (B) 5-94pts.wt. aromatic polycarbonate, preferably bis-(hydroxyphenyl)- alkane based polycarbonate, (C) 1-40pts.wt. thermoplastic flexible resin, having <=0 deg.C glass transition temperature, and exhibiting rubber eleasticity at ordinary temperature, preferably polymer consisting of a vinyl based monomer, polyurethane, etc. and (D) 2-400pts.wt. metallic filler, amounts of the components may satisfy formula I and II.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to conductive thermoplastic resin compositions. The conductive thermoplastic resin composition obtained according to the present invention can be used for surface heating elements, and for removing static electricity such as IC wrapping magazines and photosensitive film packaging. Used for electronic device housings, power cables, and shielded wires.

Conventional Technology There are already many known compositions of molding materials for plastic housings for electromagnetic shielding in which conductive fillers such as metal fibers are blended with thermoplastic resins. etc. are introduced. However, at present, little progress has been made in the practical application of these compositions.

One of the reasons for this is that most of these conductive filler-containing resins use bouncing resins such as ABS resin, polyphenyl ether, polypropylene, and polycarbonate as matrix polymers, but when metal fibers are blended, the physical properties significantly deteriorate. Not only is the performance deteriorated, but the moldability is also impaired, resulting in a molded product with poor surface properties including appearance.The special feature of plastic housings, which are substitutes for metals, is that they can be used to create complex shapes that are difficult to produce with metals. Since it is integrally molded, deterioration in moldability and physical properties is fatal.

In addition, polyester resins such as polybutylene terephthalate have low hygroscopicity and excellent dimensional properties, so they are used as materials for mechanical parts, but they are prone to warping and have poor impact resistance. There are restrictions on its use. Furthermore, nylon resin has the disadvantage of being highly hygroscopic and lacking in dimensional stability.

Problems to be Solved by the Invention The present invention provides a plastic housing that has excellent moldability such as fluidity, good surface properties, little warping and sink marks, and has sufficient impact resistance, a mechanical strength, and heat resistance. The purpose is to provide conductive composite && for electromagnetic shielding suitable for.

Means for Solving the Problems The present invention proposes that when a metal filler such as metal fiber is blended into a matrix polymer of a specific composition consisting of thermoplastic polyester, aromatic polycarbonate, and thermoplastic soft resin as essential components, impact resistance and fluidity can be improved. This is based on the discovery that a composite resin with excellent moldability, electrical conductivity, and electromagnetic shielding properties can be obtained, with no or little deterioration in various physical properties such as properties.

Namely, the present invention comprises 5 to 94 parts by weight of thermoplastic polyester (A), 5 to 94 parts by weight of aromatic polycarbonate (B), 1 to 40 parts by weight of thermoplastic soft resin (C), and metal filler (D). ) 2 to 400 parts by weight, and (
A conductive thermoplastic resin composition in which the blending amounts (coulometric parts) of (conversion), (B), (C), and (DJ) satisfy the following formulas [1] and [[l1].

A+BIC=100...[I]D/2
0≦C≦D/20 + 25 .

The present invention will be explained in detail below.

The thermoplastic polyester used in the present invention is a linear polymer having an ester bond in the molecule, and is usually a homo or/and copolymer obtained by a condensation reaction of a dicarboxylic acid component and a diol component.

Examples of dicarboxylic acid components include terephthalic acid, inphthalic acid, naphthalene, 2,6-dicarboxylic acid, naphthalene, and 2,6-dicarboxylic acid. Fudicarboxylic acid, diphenyl-4,41
- Aromatic dicarboxylic acids such as dicarboxylic acid, diphenoxyethane dicarboxylic acid, diphenyl ether dicarboxylic acid, succinic acid, cidic acid.

Examples include aliphatic dicarboxylic acids such as adipic acid and sebacic acid, and ester-forming derivatives thereof.

In addition, examples of diol components include ethylene glycol,
1.4-butanediol, trimethylene glycol, pentamethylene glycol, hexamethylene glycol,
Neopentyl glycol, diethylene glycol, triethylene glycol.

1.1-Cyclohexane dimetatool, 1,4-cyclohexane dimetatool, xylylene glycol.

2.2-hyx-(4-hydroxyphenyl)propane,
Bis-(4-hydroxyphenyl)-sulfone, bis-
(Hydroxyethoxy)-benzene.

Ethylene oxide adduct of 2.2-bis-(4-hydroxyphenyl)-furopane, 2.2-bis-(4-
Examples include propylene oxide adducts of (hydroxyphenyl)-propane and ester-forming derivatives thereof.

Furthermore, polycaprolactone and polycaprolactone are produced by ring-opening polymerization of lactone compounds.

Lactone polyesters such as poly-β-propiolactone are also mentioned as examples of thermoplastic polyesters (3) for use in the present invention. Particularly preferred thermoplastic polyesters include polyethylene terephthalate and polybutylene terephthalate.

The aromatic polycarbonate used in the present invention is a homo- or copolycarbonate or a mixture thereof,
It is obtained by a 71t@ combination reaction of known bisphenols and phosgene or carbonic diester.

Examples of bisphenols include the following compounds. Hydroquinone, resorcinol.

Dihydroxydiphenyl.

r = evisu(hydroxyphenyl)-alkane, bis-(hydroxyphenyl)-cycloaluroxyphenyl)-ketone, bis-(hydroxyphenyl)-sulfoxide, bis-(hydroxy/phenyl)-sulfone and α, a! ′-bis(hydroxyphenyl)
-diisopropylbenzene. Particularly preferred aromatic polycarbonates are poly-2,2-his-(4-hydroxyphenyl)-propane carbonate and poly-2,2-his-(4-hydroxyphenyl)-propane carbonate.
, 2-bis-(3,5-dimethyl-4-hydroxyphenyl)-propane-carbonate.

Also, bis-(hydroxyphenyl)-alkane copoly(
ester carbonate) can be used as the aromatic polycarbonate, which is obtained by copolymerizing the above-mentioned bis-(hydroxyphenyl)-alkane polycarbonate with an aromatic dicarboxylic acid such as terephthalic acid or isophthalic acid.

The thermoplastic soft resin (C) used in the present invention may be any thermoplastic resin that does not exhibit rubber elasticity at room temperature, and preferably has a glass transition temperature of 0°C or lower, more preferably -20°C or lower. The soft resin (C) is, for example, a homopolymer or random vinyl monomer.

block, graft copolymer or polyurethane.

Selected from the group consisting of polynisal elastomer and polyamide elastomer.

The vinyl struts used in the present invention are olefin monomers such as ethylene, propylene, 1- and 2-butene, isobutyne, 1- and 2-pentene, 1- and 2-hexene, and the like. Vinyl halide monomers, such as vinyl fluoride, vinylidene fluoride, chlorotrifluoroethylene, tetrachloroethylene.

Vinyl chloride, vinylidene chloride, vinyl bromide, vinylidene bromide, vinyl iodide, etc. Diene monomers such as butadiene, isoprene, piperylene, chlorprene, 1,5
-Hexadiene, norbornadiene, ethylidene norbornene, etc. Aromatic vinyl monomers, such as styrene, α-
methylstyrene.

α-Chlorstyrene, P-chlorostyrene, 2,4-dichlorostyrene, P-methylstyrene, 3,4-dimethylstyrene, O and P-divinylbenzene, P-methyl-α-methylstyrene, P-chloro- α-methylstyrene etc. Acrylic acid or methacrylic acid derivatives, such as acrylic acid, methacrylic acid, acrylonitrile, methacrylonitrile, methyl acrylate, ethyl acrylate, n- and 1sc-propyl acrylate, n- and 1so-butyl methacrylate, Nokryl City Cyclohexyl, allyl acrylate, allyl methacrylate, sodium, potassium, zinc, and metal salts of acrylic acid or methacrylic acid, etc. Vinyl ester monomers, such as vinyl acetate, vinyl propionate.

Vinyl laurate, vinyl benzoate, etc. Vinyl ether monomers, such as methyl vinyl ether, ethyl vinyl ether, etc. Examples of unsaturated dibasic acid salt conductors include maleic acid, maleic anhydride, methyl maleate, etc., and homopolymers, random, block, and graft copolymers of vinyl monomers can be prepared by known radical polymerization or ionic polymerization. You can get it. Preferred examples include ethylene-vinyl acetate copolymer, ethylene-propylene copolymer, ethylene-gupylene-butadiene copolymer, ethylene-ethyl acrylate copolymer, styrene-butadieno block copolymer, co! Selective hydrated styrene, butadiene block copo IJ-mer, ethylene-propylene-styrene graft copolymer 1? remer, ethylene-propylene-styrene-acrylonitrile graft copolymer.

Ethylene-propylene-butadiene-styrene graft copolymer, ethylene-propylene-butadiene-styrene-acrylonitrile graft copolymer, acrylonitrile-butadiene-styrene graft copolymer,
Butadiene-styrene-methyl methacrylate graft copolymer, butadiene-acrylonitrile copolymer, butadiene-styrene-acrylonitrile-methyl methacrylate graft copolymer, butadiene-acrylonitrile-methacrylic acid copolymer, styrene-maleic anhydride copolymer, ethylene-maleic acid graft copolymer, styrene-acrylic ethyl acid-n-butyl acrylate-allyl methacrylate graft copolymer,
There are zinc salts of ethylene-methacrylic acid copolymers and magnesium salts of ethylene-methacrylic acid copolymers.

The polyurethane used in the present invention has at least two
Polyester having more than 1 active hydrogen.

It is a thermoplastic polyurethane obtained by reacting one or a mixture of two or more of polyethers or low molecular weight polyols with a polyfunctional isocyanate.

Suitable polyesters include, for example, butaric acid, adipic acid,
Polyesters obtained from organic acids such as maleic acid and glycols such as ethylene glycol, propylene glycol, and butylene glycol, or if necessary, small amounts of triols such as trimethylolpropane and glycerin, or polycaprolactone, polypiparolactone, and polyesters. β-
Lactone polyesters such as propiolactone.

Suitable polyethers are, for example, polyoxyethylene glycol, polyoxypropylene glycol, poly(oxypropylene) poly(oxyethylene) glycol, polyoxytetramethylene glycol.

Low molecular weight polyol is ethylene glycol.

Refers to glycols such as propylene glycol and butylene glycol, and triols such as trimethylolpropane and glycerin.

Suitable examples of polyfunctional incyanates include tolylene diisocyanate, tolylene diisocyanate dimer, diphenylmethane-4,4/-diisocyanate, hydrogenated diphenylmethane-4,41-diisocyanate, hexamethylene diisocyanate, and the like.

The polyester elastomer used in the present invention is a copolymer consisting of an aromatic polyester block and a polyether block or an aromatic polyester block and an aliphatic polyester block. Examples of the dicarboxylic acid forming the aromatic polyester block include terephthalic acid, isophthalic acid, naphthalene dicarboxylic acid, adipic acid, and sebacic acid, with prephthalic acid and isophthalic acid being particularly preferred. Diols include, for example, tetramethylene glycol, ethylene glycol, propylene glycol, hexamethylene glycol, cyclohexane glycol, etc. Tetramethylene glycol is preferred for Ih. Examples of the polyether include polyoxyethylene glycol, polyoxypropylene glycol, and polyoxytetramethylene glycol, with polyoxytetramethylene glycol being particularly preferred. Examples of the aliphatic polyester include polyadipate, polysebacate, polycaprolactone, and polycaprolactone is particularly preferred.

The polyamide elastomer used in the present invention is a copolymer consisting of a polyamide plotter such as polycaprolactam or polylaurolactam, and a polyester block or a polyether block such as polyoxyethylene, polyoxypropylene, or polyoxytetramethylene.

The proportions of the thermoplastic polyester (3), aromatic polyester (B), and thermoplastic soft resin (C) of the present invention are (A) 5 to 94 parts by weight, preferably 15 to 80 parts by weight, and (B) 5 to 80 parts by weight, respectively. 94 parts by weight, preferably 15 to 80 parts by weight,
(C) 1 to 40 parts by weight, preferably 5 to 30 parts by weight, (
The total amount of 3), (B), and (C) is 100 parts by weight. A more preferable range is (A) 20 to 70
Parts by weight, (B) 20-70 parts by weight, (C) 10
~25 parts by weight.

If the amount of carbon is less than 5 parts by weight or if (B) is more than 94 parts by weight, moldability such as fluidity and solvent crack resistance will deteriorate, and mechanical properties such as impact resistance will deteriorate. 94 prisoners again
If the amount of (B) exceeds the overlapping part or is less than 5 parts by weight, moldability deteriorates, warpage is likely to occur, and initial impact resistance and weld line strength become insufficient. If (C) exceeds 40 parts by weight or D/20+25, the heat deformation temperature, flexural strength, 9 flexural modulus, etc. will decrease, and 1 part of air volume will be less than D/20.
If it is smaller, the smoothness of the molded product surface, impact resistance,
Weld line strength is insufficient.

The metal filler (D) used in the present invention is iron.

Examples include fillers in the form of fibers, flakes, or particles of metals such as aluminum, copper, nickel, and various alloys thereof, and fillers in the form of fibers, flakes, or single particles whose surfaces are coated with metals such as aluminum, nickel, etc. .

The fibrous Kincho filler is a metal wicker manufactured by, for example, a known drawing method, melt spinning method, cutting method, chatter vibration cutting method, etc., and a metal coat manufactured by coating non-metallic fibers with a metal. There are fibers. Particularly preferred examples are aluminum fiber, brass fiber, stainless steel fiber, aluminum coated glass fiber and nickel coated carbon fiber.
Normally, fiber diameter is 1 to 150μ, fiber length is 0.5 to 151
M11 short fibers are used, but it is also possible to use metal filaments such as stainless steel long fibers. In this case, a method of manufacturing pellets by cutting strands of bundled metal filaments impregnated with a fat component is carried out. .

Examples of the flaky metal filler include flakes of metal such as aluminum and nickel, and flaky nonmetallic filler whose surface is coated with metal such as aluminum and nickel. Particularly preferred is nickel-coated mica, which typically has a thickness of 1 to 200μ1 width x length of 0.1 to 15mm x 0.5mm.
IX1511jl is used.

Particulate metal fillers include, for example, powders of iron, aluminum, copper, nickel, and alloys thereof, and nonmetallic powders coated with aluminum or nickel.

In the conventional case, the blending amount of the metal filler (9) is 10 μm of the thermoplastic resin mixture.
It is essential that the amount is 2 to 400 parts by weight, preferably 5 to 300 parts by weight, particularly preferably 8 to 200 parts by weight. If the amount of metal fiber (D) is less than 2 parts by weight, the effect of imparting conductivity is insufficient, and the
If it exceeds parts by weight, fluidity will decrease, resulting in problems such as mixing, mixing,
Molding becomes extremely difficult.

Further, the metal filler (D) is preferably surface-treated with a known silane-based, titanate-based, or aluminum-based coupling agent. By performing coupling processing,
Adhesion with the resin is increased, heat distortion temperature, tensile strength, etc. are further improved, and changes in conductivity due to environmental changes are suppressed.

The conductive thermoplastic resin composition of the present invention may optionally include a fibrous reinforcing agent or non-fibrous filler that improves rigidity, tensile strength, etc., a thermal oxidation and ultraviolet degradation stabilizer, an n-type agent, a lubricant,
A small amount of branching and crosslinking agents (epoxy resins, polyfunctional compounds such as triaryl compounds), flame retardants such as red phosphorus, phosphorus compounds, halogen compounds, flame retardant aids such as antimony oxide and zinc oxide, and crystallization of polyester. Crystallization promoters such as graphite, talc, organic acid metal salts, etc. can be added to accelerate and shorten the molding cycle.

The thermoplastic polyester powder, aromatic polycarbonate (B), thermoplastic soft resin (C), and metal liner (D) of the present invention can be blended by melt-kneading and pelletizing them all at once, or by melt-kneading them all at once and pelletizing them. There is a blending method during molding in which the metal filler (D) is molded at the same time as the blending, or the metal filler (D) is molded in advance (
4) Or 俤) Or a method of melt-kneading with one or more types of (C) to produce a master pellet, mixing it with the remaining resin during molding, and forming the metal filament described in the section of the description of the fibrous metal filler. Any known method can be used, such as a method of impregnating the material with a resin component and further cutting the material into pellets.

-Hereinafter, the present invention will be explained in more detail with reference to Examples.

Examples Examples 1 to 11 and Comparative Examples 1 to 5 As thermoplastic polyesters, polyethylene terephthalate (Kanebo Gosen EF G-6), copolyethylene terephthalete isophthalate (Kanebo Gosen IF
G-8), poly(bisphenol A carbonate) as aromatic polycarbonate (Ondai Kasei Panrai) K-
1300), ethylene-vinyl acetate copolymer as thermoplastic soft resin (Mitsui Polychemical Evaflex-1
50).

Styrene-butadiene block copolymer (Tetsu Kagaku Kogyo Delica 5TR1602), ionomer (Mitsui Polychemical Himilan 1554), brass fiber with fiber diameter 30μ and fiber length 1.5fi as metal filler (Kobe Cast Iron Works KC Metal Fiber 2600) In addition, as additives, glass fiber (Nittobo Co., Ltd., fiber length 6 mm), antioxidant (
Using Ciba Geigy Irganox 1010) and a crystallization accelerator (talc), the compositions shown in Table 1 were prepared using an extruder with a diameter of 2511 mm (screw rotation speed: 10° rpm, discharge rate: 90 to 120 mm/min, The mixture was melt-kneaded using a cylinder temperature of 250 to 265°C and extruded into strands, and pellets were produced using a pelletizer.

Next, the pellets were injection molded using a commonly used injection molding method for reinforced polyethylene terephthalate resin, and the physical properties were measured. The results were as follows: Examples 12 to 18 and Comparative Examples 6 to 8.
1300), 30 parts by weight of thermoplastic soft resin, C1 acrylic rubber acrylontril-styrene copolymer (Hitachi Chemical Pitax V6101AP), ethylene-propylene copolymer (Japan Synthetic Rubber EPOIP)
X), styrene-butadiene block copolymer (Denka Kagaku Kogyo Denka 5TR1602) and polyester elastomer (Toyobo Pelprene P-150M), aluminum fiber (fiber diameter 60μ, fiber length 2fi) as metal filler (Kobe Foundry Works) KC metal fiber A2
017) and stainless steel fiber (fiber diameter 8μ, fiber length 5mm) (Nippon Seisen Nylon Sizing Chop 5US31
6L) Irganox 1010 (Ciba Geigy) was added as an additive to the composition shown in Table 3. However, Example 17. In Comparative Example 8, 45 parts by weight of polybutylene terephthalate and 25 parts by weight of thermoplastic soft resin were then pelletized in the same manner as in Examples 1 to 11 to form a regular reinforced polybutylene terephthalate resin. The material was injection molded under the following injection molding conditions, and its physical properties were measured.

The results are shown in Table-4.

Examples 19 and 20 The pellets containing stainless steel fibers produced in Example 17 were used as master pellets, and during molding, polybutylene terephthalate, poly(bisphenol A carbonate), and styrene-butylene were added to the compositions shown in Table 3. It was diluted with Genblock copolymer, injection molded, and its physical properties were measured. The results are shown in Table 4. However, in Example 20, 0.00% of bisphenol A-based epoxy resin (manufactured by polymerization of bisphenol A diglycidyl ether and bisphenol A) was added to 100 parts by weight of the resin composition during molding.
It was added at a ratio of 5 polymerized parts.

Example 21 Polyethylene terephthalate (Kanebo Gosen EFG-6
) 35 weight ff 1 part, styrene-butadiene block copolymer (f+1 Ki Kagaku Kogyo Denka 5TR1602) 1
To 5 parts by weight, 830 parts by weight of the stainless steel taR used in Examples 15 to 19 was blended, and the mixture was heated using a diameter 25fi extruder (
Screw rotation speed: 10 Orpm.

Pellets were produced using a discharge rate of 105 y/min and a cylinder temperature of 260°C. Next, to 80 parts by weight of the pellets, 30 parts by weight of poly(bisphenol A carbonate) (Kijin Kasei Panlite ni-1300) and a fully aromatic polyester (Unitika U Polymer U-100) were added.
20 parts by weight were blended during molding, injection molded (cylinder temperature 290°C, mold temperature 110°C), and physical properties were measured. The results are shown in Table-5.

Example 22 Polyethylene terephthalate, styrene of Example 21
50 parts by weight of a copolyester carbonate made by interfacial condensation of a mixture of bisphenol A, phosgene, terephthaloyl chloride, and inphthaloyl chloride is molded into 80 parts by weight of pellets containing a butadiene block copolymer and stainless steel fibers. The mixture was then blended and injection molded in the same manner as in Example 21, and the physical properties were measured.

The results are shown in Table-5.

Examples 23 and 24 Polybutylene terephthalate (polyplastic DURANEX 2011) 50 parts ffi, poly(bisphenol A carbonate) (Ondai Kasei Panlite -13
00) 30 parts by weight, 20 parts by weight of styrene-butadiene block copolymer (Denka Kagaku Kogyo Denka 5TR1602) and brass fiber (m diameter 20μ, fiber length 1 fin) (Kobe Foundry Works KC Metal Fiber C-2600) 78 The overlapping parts were blended, pelletized and injection molded in the same manner as in Examples 1 to 11. However, in Example 24, brass fibers were used that were surface-treated with a coupling agent, γ-glycidioxypropyltrimethoxysilane (Nippon Unicar A187) (0.5% by weight based on the brass fibers). did. The results of the measured physical properties are shown in Table-6.

Examples 25-27 Polyethylene terephthalate (Kanebo Gosen EF'□'
G-6) 50 parts by weight, 30 parts by weight of poly(bisphenol A carbonate) (Kijin Kasei Panlite-1300), 0.1 parts by weight of Irganox 10-
As shown in 7, as the thermoplastic soft resin, Edylene-Vininohi acetate copolymer (Mitsui Polychemical Evaflex 150) was used.

Styrene-pkg diene block copolymer (Denka Kagaku Kogyo Denka 5TR1602), aluminum coated galan m fiber cam diameter 25μ as metal filler.

Example 1
In the same manner as in steps 1 to 11, kneading and injection molding were performed. The results of physical property measurements are shown in Table-8.

Example 28 Stainless steel long fiber (fiber diameter 8μ) as metal filler
An example using Naslon 5US316L (Nippon Seiren) will be described. Polybutylene terephthalate (Polyplastics, DURANEX 2 (111) 60 parts by weight, polybisphenol A carbonate (Otodai Kasei)
Panlite -1300) 30 parts by weight, styrene-butadiene block copolymer (Denka Kagaku Kogyo Denka STR)
1602) 1074Ji part and Irganox 1010
(Ciba Gaiki) 0.1 part by mass is blended, melted and kneaded in a 25-diameter extruder, and extruded. At 1 hour, bundled stainless steel long fibers are impregnated with a resin component to form strands, which are cut with a pelletizer and made into pellets. The pellets contained 100 parts by weight of stainless steel fibers per 100 parts by weight of resin.

This was injection molded under the same conditions as Examples 12 to 18, and the physical properties were measured. The results are shown in Table-9.

Effects of the Invention The metal filler (2) constituting the conductive thermoplastic resin composition of the present invention provides excellent conductivity in a small amount to the thermoplastic root B row, which is originally electrically insulating, and improves bending strength.

Improves flexural modulus and greatly increases heat deformation temperature. A polymer blend consisting of thermoplastic polyester (5), aromatic polycarbonate (B), and thermoplastic soft resin (C) has excellent impact resistance, heat resistance, solvent resistance, and moldability in the presence of gold scrap filler (DJ). properties, weld strength and surface smoothness.

The conductive thermoplastic resin composition of the present invention has a volume resistivity of 1
It has excellent conductivity of the order of 0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000 excellent conductivity, high impact strength, heat deformation temperature, and weld strength, as well as excellent moldability and molding surface smoothness.

Procedural amendment 1. Description of the case 1982 Patent Application No. 169681 2 Name of the invention Conductive thermoplastic resin composition 8 Person making the amendment Relationship to the case Patent applicant Address 17-4 Sumida 5-chome, Sumida-ku, Tokyo Contact Column 6 of “Claims” and “Detailed Description of the Invention” of the specification No. 1-5-90 Tomobuchi-cho, Bejima-ku, Osaka 584, Contents of amendment (1) The claims of the specification The description in the scope section will be amended as shown in the attached sheet.

(2) The statement in the detailed description of the invention section of the specification is amended as follows.

Claims (1) Thermoplastic polyester (A) 5 to 94 parts by weight, aromatic polycarbonate) (B) 6 to 94 parts by weight, thermoplastic soft resin (C) 1 to 40 parts by weight, and metal filler C
D) Contains 2 to 400 parts by weight.

A conductive thermoplastic resin composition in which the blending amount (parts by weight) of each of (B), (C), and (9) satisfies the following formula [I] and tri).

A+B+C=100...[I]D/20≦
C≦D/2G + 25... (1N] (2
) (A) 15-80 parts by weight, @15-80 parts by weight and (
C) 5 to 80 parts by weight of the composition according to claim 1.

(3) Claim 1, wherein the thermoplastic polyester is a polymer obtained by a condensation reaction of an aromatic dicarboxylic acid or its ester-forming derivative and an aliphatic glycol having 2 to 6 carbon atoms or its ester-forming derivative. Compositions as described.

(4) The thermoplastic polyester is a fully aromatic polyester, or a polyester obtained by the synthesis reaction of a wholly aromatic polyester, an aromatic dicarboxylic acid or an ester-forming derivative thereof, and an aliphatic glycol having 2 to 6 carbon atoms or an ester-forming derivative thereof. A composition according to claim 1, which is a mixture with a combination of:

=(5) The aromatic dicarboxylic acid or its ester-forming derivative is terephthalic acid, isophthalic acid, naphthalene dicarboxylic acid, or an ester-forming derivative thereof, and the aliphatic glycol or its ester-forming derivative is ethylene glycol.

The composition according to claim 8 or 4, which is tetramethylene glycol, hexamethylene glycol, or an ester-forming derivative thereof.

(6) A patent claim in which the wholly aromatic polyester contains terephthalic acid and isophthalic acid as a dicarboxylic acid component, and bis-(hydroxyphenyl)-alkane and/or bis-(hydroxyphenyl)-sulfone as a diol component. The composition according to item 4.

(7) The composition according to claim 84, wherein the aromatic polycarbonate is a bis-(hydroxyphenyl)-alkane polycarbonate.

(8) Aromatic polycarbonate is bis-(hydroxyphenyl)-alkane copoly(ester-carbonate) alone or bis-(hydroxyphenyl)-alkane-based polycarbonate and bis-(hydroxyphenyl)-alkane copoly(ester-carbonate) The composition according to claim 1, which is a mixture with.

(9) The composition according to claim 1, wherein the thermoplastic soft resin is a thermoplastic soft resin having a glass transition temperature of 0° C. or lower and exhibiting rubber elasticity at room temperature.

2. The composition according to claim 1, wherein the QO thermoplastic soft resin is a polymer comprising one or more vinyl monomers, polyurethane, polyester elastomer, or polyamide elastomer.

Qη vinyl monomer is olefin monomer, hao/7'
Patent claims for vinyl monomers, diene monomers, aromatic vinyl monomers, acrylic acid or methacrylic acid rust conductors, vinyl ester monomers, vinyl ether monomers, and unsaturated dibasic acid rust conductors The composition according to item 10.

11. The composition according to claim 10, wherein the polyester elastomer comprises a polyethylene terephthalate block or a polybutylene terephthalate block and a polyether block or an aliphatic polyester block.

(2) The composition according to claim 1, wherein the metal filler is aluminum fiber, brass fiber, or stainless steel fiber.

α→ The composition according to claim 1, wherein the metal filler is aluminum coated glass am.

(To) Metal filler is nickel coated carbon! ! [The composition according to claim 1.

The composition according to claim 1, wherein the αQ metal filler is nickel-coated mica.

The composition according to claim 1, wherein the amount of Q'I) metal filler is 5 to 800 parts by weight.

(g) The composition according to claim 1, wherein the metal filler is surface-treated with a silane-based or titanate-based coupling agent.

Claims (18)

[Claims] (1) 5 to 94 parts by weight of thermoplastic polyester (A), 5 to 94 parts by weight of aromatic polycarbonate (B), 1 to 40 parts by weight of soft thermoplastic resin (C), and metal filler (D)
2 to 400 parts by weight, and (A), (B)
, (C) and (D) in the following amounts (parts by weight):
A conductive thermoplastic resin composition that satisfies formulas I] and [II]. A+B+C=100...[I] D/20≦C≦D/20+25...[II] (2) The composition according to claim 1, containing 15 to 80 parts by weight of (A), 15 to 80 parts by weight of (B), and 5 to 30 parts by weight of (C). (3) Claim 1, wherein the thermoplastic polyester is a polymer obtained by a condensation reaction of an aromatic dicarboxylic acid or its ester-forming derivative and an aliphatic glycol having 2 to 6 carbon atoms or its ester-forming derivative. Compositions as described. (4) The thermoplastic polyester is a wholly aromatic polyester alone, or a polymer obtained by a condensation reaction between it, an aromatic dicarboxylic acid or an ester-forming derivative thereof, and an aliphatic glycol having 2 to 6 carbon atoms or an ester-forming derivative thereof. The composition according to claim 1, which is a mixture with. (5) The aromatic dicarboxylic acid or its ester-forming derivative is terephthalic acid, isophthalic acid, naphthalene dicarboxylic acid, or an ester-forming derivative thereof, and the aliphatic glycol or its ester-forming derivative is ethylene glycol, tetramethylene glycol, 5. The composition according to claim 3 or 4, which is hexethylene glycol or an ester-forming derivative thereof. (6) Claims in which the wholly aromatic polyester contains terephthalic acid and isophthalic acid as the dicarboxylic acid component and bis-(hydroxyphenyl)-alkane and/or bis-(hydroxyphenyl)-sulfone as the diol component. The composition according to item 4. (7) The composition according to claim 4, wherein the aromatic polycarbonate is a bis-(hydroxyphenyl)-alkane polycarbonate. (8) Aromatic polycarbonate is bis-(hydroxyphenyl)-alkane copoly(ester-carbonate) alone or bis-(hydroxyphenyl)-alkane-based polycarbonate and bis-(hydroxyphenyl)-alkane copoly(ester-carbonate) The composition according to claim 1, which is a mixture with. (9) The composition according to claim 1, wherein the thermoplastic soft resin is a thermoplastic soft resin having a glass transition temperature of 0° C. or lower and exhibiting rubber elasticity at room temperature. (10) The composition according to claim 1, wherein the thermoplastic soft resin is a polymer made of one or more vinyl monomers, polyurethane, polyester elastomer, or polyamide elastomer. (11) The vinyl monomer is an olefin monomer, a halogenated vinyl monomer, a diene monomer, an aromatic vinyl monomer, an acrylic acid or methacrylic acid salt conductor, a vinyl ester monomer, a vinyl ether monomer. 11. The composition according to claim 10, which is a dibasic acid derivative and an unsaturated dibasic acid derivative. (12) The composition according to claim 10, wherein the polyester elastomer comprises a polyethylene terephthalate block or a polybutylene terephthalate block and a polyether block or an aliphatic polyester block. (13) The composition according to claim 1, wherein the metal filler is aluminum fiber, brass fiber, or stainless steel fiber. (14) The composition according to claim 1, wherein the metal filler is aluminum coated glass fiber. (15) The composition according to claim 1, wherein the metal filler is nickel-coated carbon fiber. (16) The composition according to claim 1, wherein the metal filler is nickel-coated mica. (17) The composition according to claim 1, wherein the amount of the metal filler is 5 to 300 parts by weight. (18) The composition according to claim 1, wherein the metal filler is surface-treated with a silane-based or titanate-based coupling agent.