JPH05295249A - Polyphenylene ether-based resin molded product excellent in mechanical characteristic - Google Patents

Abstract

PURPOSE:To obtain the subject composition consisting of a resin composition containing a thermoplastic resin, polyphenylene ether and a polymer additive, exhibiting a specific dispersing state and excellent in mechanical characteristics such as impact resistance, tensile characteristics or flexural characteristics and appearance. CONSTITUTION:The objective molded product is obtained from a resin containing (A) a thermoplastic resin (preferably a rubbermodified styrenic resin), (B) a polyphenylene ether [preferably poly (2,6-dimethyl-1,4-phenylene ether)] and (C) a polymer additive being a liquid at 100 deg.C. This molded product has <=1 piece/mm<2> dispersed particle having >=50mum average particle diameter in an unit cross section. As the component C, e.g. a plasticizer such as dimethyl phthalate or a stabilizer such as a metallic soap is used. Furthermore, In order to realize this disperse state, the resin composition is preferably prepared by blending the component A with the component B at 250-300 deg.C by a melt extrusion method and then blending the resultant resin component with the component C at 200-250 deg.C by the melt extrusion method.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polyphenylene ether resin molding. More specifically, the present invention relates to a polyphenylene ether resin molded product having excellent mechanical properties such as impact resistance, tensile properties, bending properties and the like and appearance.

[0002]

2. Description of the Related Art Polyphenylene ether resins are used in various fields such as automobile parts, home electric appliance parts and OA equipment parts because they have excellent heat resistance and impact resistance. In recent years, various polymer additives have been used for higher performance in this field. For example, it is commonly practiced to add liquid paraffin (mineral oil) to improve processability, or to mix an organic phosphorus compound to impart flame retardancy.

Therefore, the inventors of the present invention conducted flame retardant studies as a part of improving the functionality of polyphenylene ether resins, and as a result, (a) rubber-modified styrene resin, (b) polyphenylene ether, It was found that the combination of (c) red phosphorus, (d) organic phosphorus compound, and (e) triazine skeleton-containing compound improves the flame retardancy while maintaining the impact resistance, and Japanese Patent Application No. 3-182328. No. filed.

However, although the molded product obtained from the resin composition of Japanese Patent Application No. 3-182328 has excellent impact resistance, it does not have sufficient tensile properties and bending properties, and also has flame retardancy and appearance. It was not always satisfactory.

[0005]

In view of the above situation, the present invention does not have the above-mentioned problems, that is, it has excellent mechanical properties such as impact resistance, tensile properties and bending properties, and excellent appearance. It is intended to provide a polyphenylene ether resin molded product.

[0006]

Means for Solving the Problems The inventors of the present invention have earnestly studied to improve the mechanical properties and appearance of a polyphenylene ether type resin molding, and as a result, the conventional (A) thermoplastic resin and (B) polyphenylene In a molded product obtained from a resin composition containing an ether and (C) a polymer additive which is liquid at 100 ° C., it is surprising to control the number of dispersed particles having an average particle diameter of 50 μm or more to be a specific number or less As a matter of fact, they have found that a molded product with dramatically improved mechanical properties and appearance can be obtained, and have reached the present invention.

That is, the present invention relates to (A) a thermoplastic resin,
A molded product obtained from a resin composition containing (B) polyphenylene ether and (C) a polymer additive which is liquid at 100 ° C., wherein the molded product has dispersed particles having an average particle diameter of 50 μm or more. The number is 1 / mm in the unit cross-sectional area
^The present invention provides a polyphenylene ether-based resin molded article having excellent mechanical properties characterized by being ² or less.

The present invention will be described in detail below. The molded article of the present invention is formed under specific extrusion molding conditions from a resin composition having (A) a thermoplastic resin, (B) polyphenylene ether, and (C) a polymer additive that is liquid at 100 ° C. (A), which is a molded product in a dispersed state of
The object of the present invention cannot be achieved without any of (B), (C) and the specific dispersion state.

The component (A) is a main component of the molding resin composition and plays a role of maintaining the strength of the molded product, and the component (B) is a component for imparting heat resistance and impact resistance,
The component (C) is a component for imparting functionality such as flame retardancy and fluidity to the polyphenylene ether resin. Here, it is important to keep the resin composition in a specific dispersion state. That is, the melted state of the component (B) varies depending on the extrusion molding conditions, and if the number of dispersed particles having an average particle diameter of 50 μm or more increases by a specific number or more, the mechanical properties deteriorate.

The thermoplastic resin as the component (A) of the present invention is a thermoplastic resin such as polystyrene type, polyolefin type, polyvinyl chloride type, polyamide type, polyester type, polyphenylene sulfide type, polycarbonate type or polymethacrylate type. Is. Here, a polystyrene-based thermoplastic resin is particularly preferable as the thermoplastic resin, and a rubber-modified styrene-based resin is preferably used.

The rubber-modified styrenic resin as the component (A) of the present invention is a graft polymer in which a rubber-like copolymer is dispersed in particles in a matrix made of a vinyl aromatic polymer. Known bulk polymerization, bulk suspension polymerization, solution polymerization of a monomer mixture by adding an aromatic vinyl monomer and a vinyl monomer copolymerizable therewith in the presence of a rubbery polymer. Alternatively, it can be obtained by emulsion polymerization.

Examples of such resins include high impact polystyrene, ABS resin (acrylonitrile-butadiene-styrene copolymer), AAS resin (acrylonitrile-acrylic rubber-styrene copolymer), AES resin (acrylonitrile-ethylene). Propylene rubber-styrene copolymer) and the like. Here, the rubber-like polymer needs to have a glass transition temperature (Tg) of -30 ° C or lower, and if it exceeds -30 ° C, the impact resistance decreases.

Examples of such a rubber-like polymer include diene rubbers such as polybutadiene, poly (styrene-butadiene) and poly (acrylonitrile-butadiene), and saturated rubbers obtained by hydrogenating the above diene rubbers, isoprene rubbers, chloroprene rubbers. , An acrylic rubber such as polybutyl acrylate, an ethylene-propylene-diene monomer terpolymer (EPDM), and the like, and a diene rubber is particularly preferable.

The aromatic vinyl monomer which is an essential component in the graft-polymerizable monomer mixture to be polymerized in the presence of the rubbery polymer is, for example, styrene, α-methylstyrene, paramethylstyrene, p-chlorostyrene, p-
Bromostyrene, 2,4,5-tribromostyrene and the like are preferable, and styrene is the most preferable, but styrene may be the main component and other aromatic vinyl monomers may be copolymerized.

If necessary, one or more monomer components copolymerizable with the aromatic vinyl monomer may be introduced as a component of the rubber-modified styrene resin. When it is necessary to enhance oil resistance, unsaturated nitrile monomers such as acrylonitrile and methacrylonitrile can be used. When it is necessary to reduce the melt viscosity at the time of blending, an acrylate ester composed of an alkyl group having 1 to 8 carbon atoms can be used. Further, when it is necessary to further increase the heat resistance of the polymer composition, α-
Monomers such as methylstyrene, acrylic acid, methacrylic acid, maleic anhydride, and N-substituted maleimide may be copolymerized. The content of the vinyl monomer copolymerizable with the vinyl aromatic monomer in the monomer mixture is 0 to 40% by weight.

The rubber-like polymer in the rubber-modified styrenic resin of the present invention is preferably 5 to 80% by weight, particularly preferably 10 to 50% by weight, and the graft-polymerizable monomer mixture is preferably 95 to 20%. %, More preferably 90 to 50% by weight. Outside this range, the impact resistance and rigidity of the desired polymer composition cannot be balanced. Furthermore, the rubber particle size of the styrene-based polymer is
0.1-5.0 μm is preferable, and 0.2-3.0 μ is particularly preferable.
m is preferred. Outside the above range, the impact resistance tends to decrease.

The polyphenylene ether as the component (B) of the present invention.
Tell (hereinafter, abbreviated as PPE) is a homopolymer and / or a copolymer having a bonding unit represented by the following formula.

[0018]

[Chemical 1]

However, R ₁ , R ₂ , R ₃ and R ₄ are each selected from the group consisting of hydrogen, hydrocarbons and substituted hydrocarbon groups and may be the same or different from each other. As a concrete example of this PPE, poly (2,
6-dimethyl-1,4-phenylene ether), 2,6
-Copolymers of dimethylphenol and 2,3,6-trimethylphenol are preferred, and among them, poly (2,6
-Dimethyl-1,4-phenylene ether) is preferred. The method for producing such PPE is not particularly limited, and for example, a complex of a cuprous salt and an amine obtained by the method described in US Pat. No. 3,306,874 is used as a catalyst, and, for example, 2,6 xylenol is used. Can be easily produced by oxidatively polymerizing the above compounds. In addition, US Pat. No. 3,306,875 and US Pat.
No. 7,357, U.S. Pat. No. 3,257,358, and Japanese Examined Patent Publication No. 52-17880, Japanese Patent Laid-Open No. 5-7880.
It can be easily manufactured by the method described in 0-51197. The reduced viscosity of the PPE used in the present invention (0.5
g / dl, chloroform solution, measured at 30 ° C.) is 0.
It is preferably in the range of 20 to 0.70 dl / g,
More preferably, it is in the range of 0.30 to 0.60 dl / g. Examples of means for satisfying the above requirements regarding the reduced viscosity of PPE include adjustment of the amount of catalyst during the production of PPE.

The component (C) of the present invention is a component for imparting a special function to the polyphenylene ether resin,
In particular, it is a polymer additive that is liquid at 100 ° C. Here, the polymer additive is a plasticizer, a stabilizer, an ultraviolet absorber, an antistatic agent, a flame retardant, a colorant, a foaming agent, a lubricant, a fragrance, an antiaging agent, or the like. Examples of the plasticizer include phthalic acid esters such as dimethyl phthalate, diethyl phthalate, and diisobutyl phthalate, phthalic acid mixed group esters such as butylbenzyl phthalate, and diisodecyl succinate, and dioctyl adipate. Basic acid esters and glycol esters such as diethylene glycol dibenzoate, fatty acid esters such as butyl oleate and methyl acetylricinoleate, epoxy plasticizers such as epoxidized soybean oil and epoxidized linseed oil, and others, such as trioctyl trimellitate and ethylphthalic acid. Ruethyl glycolate, butyl phthalyl butyl glycolate, acetyl tributyl citrate, chlorinated paraffin, polypropylene adipate, polyethylene sebacate, triacetin, tributyrin, toluene sulfonamide and alkyl It can be exemplified benzene, biphenyl and partially hydrogenated terphenyl and camphor like.

Examples of the above stabilizer include metal soap, lead stabilizer, organic tin stabilizer, composite stabilizer, epoxy compound and the like. Examples of the foaming agent include azo-based foaming agents such as azobisformamide, azobisisobutyronitrile and diazoaminobenzene, N, N'dimethyl N, N'dinitron terephthalamide and N, N'difoaming agents. Examples thereof include N-nitroso-based foaming agents such as nitrosopentamethylenetetramine, benzonsulfonyl hydrazide, toluene 4 sulfonyl hydrazide, and sulfonyl hydrazide such as benzene 1,3 disulfonyl hydrazide.

Examples of the lubricant include hydrocarbon lubricants such as liquid paraffin, fatty acid lubricants, fatty acid amide lubricants, alcohol plasticizers, metal soaps and the like. Examples of the flame retardant include organic phosphorus compounds, such as phosphine, phosphine oxide, biphosphine, phosphonium salt, phosphinate, phosphoric acid ester, and phosphorous acid ester. More specifically, triphenyl phosphate, methyl neopentyl phosphite, pentaerythritol jetyl diphosphite, methyl neopentyl phosphate, phenyl neopentyl phosphate, pentaerythritol diphenyl diphosphate, dicyclopentyl hypophosphite. , Dineopentyl hypophosphite, phenylpyrocatechol phosphite, ethylpyrocatechol phosphate, dipyrocatechol hypophosphite and the like.

Here, a hydroxyl group-containing aromatic phosphate ester is particularly preferable, and it may be used in combination with the above-mentioned organic phosphorus compound having no hydroxyl group. The above-mentioned hydroxyl group-containing aromatic phosphoric acid ester is a phosphoric acid ester containing one or more phenolic hydroxyl groups in tricresyl phosphate, triphenyl phosphate, condensed phosphoric acid ester thereof or the like, For example, the following compounds.

[0024]

[Chemical 2]

[0025]

[Chemical 3]

(However, Ar ₁ , Ar ₂ , Ar ₃ and A
r ₄ , Ar ₅ and Ar ₆ are aromatic groups selected from a phenyl group, a xylenyl group, an ethylphenyl group, an isopropylphenyl group and a butylphenyl group, and at least one hydroxyl group is contained in the (B) phosphate ester. It is substituted with the above aromatic group. Further, n represents an integer of 0 to 3, and m represents an integer of 1, 2, 3, 4, or more. ) Among the (C) hydroxyl group-containing aromatic phosphoric acid esters of the present invention, diphenylresorcinyl phosphate of the following formula is particularly preferable, and its production method is disclosed in, for example, JP-A-1-223158. , Phenol, hydroxyphenol, aluminum chloride and phosphorus oxychloride.

[0027]

[Chemical 4]

In order to further improve the flame retardancy of the resin composition of the present invention, (D) red phosphorus and (E) are added, if necessary.
A compound containing a triazine skeleton can be added. The red phosphorus as the component (D) is, in addition to general red phosphorus, the surface thereof is previously coated with a film of a metal hydroxide selected from aluminum hydroxide, magnesium hydroxide, zinc hydroxide and titanium hydroxide. Treated, aluminum hydroxide, magnesium hydroxide, zinc hydroxide, treated with a film made of a metal hydroxide selected from titanium hydroxide and a thermosetting resin, aluminum hydroxide, magnesium hydroxide, It is also possible to suitably use a film obtained by double-coating a film of a thermosetting resin on a film of a metal hydroxide selected from zinc hydroxide and titanium hydroxide.

The compound containing a triazine skeleton as the component (E) acts as a flame retardant aid for phosphorus-containing compounds, and specific examples thereof include melamine, succinoguanamine, adipguanamine, and methylglutaloganamin. However, melamine is most preferred. Then, in order to further improve the fluidity of the resin composition of the present invention, (F) a higher fatty acid amide compound can be blended, if necessary.

The higher fatty acid amide compound as the component (F) is a reaction product of a higher fatty acid and (i) diamine or (b) amino alcohol. Here, the higher fatty acid is a fatty acid having an alkyl group or an alkenyl group having 11 to 21 carbon atoms, and stearic acid is particularly preferable.
The above-mentioned diamines are hydrocarbon diamines having 2 to 10 carbon atoms, and ethylenediamine is particularly preferable.

Further, the above-mentioned amino alcohols are hydrocarbon amino alcohols having 2 to 10 carbon atoms, and examples thereof include monoethanolamine, 3-amino-1-propanol, 4-amino-1-butanol and the like. Be done. Especially as the higher fatty acid amide compound of the component (F) of the present invention, ethylene bis stearylamide (Ethyl
Nebisstearamide) is preferable, and it improves fluidity while maintaining flame resistance, heat resistance and impact resistance.

In the resin composition of the present invention, the thermoplastic resin (A) and the polyphenylene ether (B) form a resin component, and the proportion of the component (B) in 100 parts by weight of the resin component is 10%. It is preferably in the range of to 70 parts by weight. If the amount of component (B) is less than 10 parts by weight, heat resistance and impact resistance are not sufficient, and if it exceeds 70 parts by weight, fluidity decreases, which is not preferable. The more preferable range of the component (B) is 1
It is 0 to 50 parts by weight.

Next, in the resin composition of the present invention, 5 to 40 parts by weight of the (C) polymer additive and (D) red phosphorus are added to 100 parts by weight of the components (A) and (B) in total. 0-20
It is preferable that the amount of the triazine skeleton-containing compound (E) is 0 to 30 parts by weight and the higher fatty acid amide compound (F) is 0 to 20 parts by weight. Here, if it deviates from the above range, it tends to be difficult to balance the functional properties such as fluidity and flame retardancy, heat resistance, and mechanical properties.

The molded article of the present invention has the above-mentioned functionality and mechanical properties only when it is formed into a specific dispersed state. That is, it is essential that the number of dispersed particles having an average particle diameter of 50 μm or more in the molded body is 1 particle / mm ² or less in a unit cross-sectional area. Specifically, 4m on the surface of the molded product
The number of dispersed particles having an average particle diameter of 50 μm or more was counted by taking a microscope image of 100 sheets of a field of view of m ² and the average particle diameter means the diameter of a true spherical shape and the distorted spherical shape. It is the arithmetic mean of the maximum length and the minimum length. When the number of dispersed particles having a particle size of 50 μm or more exceeds 1, mechanical properties such as tensile properties and bending properties and the above-mentioned functionality deteriorate.
In particular, the tensile elongation is significantly reduced due to the notch effect due to the presence of large particles.

In order to realize the distributed state of the present invention,
Only the resin component consisting of the component (A) and the component (B) has a relatively high temperature (200 to 350 ° C., more preferably 250 to 30).
After mixing by a melt extrusion method at 0 ° C., the resin component and additive components ((C), (D), (E), and (F) components) are mixed at a relatively low temperature (150 to 250 ° C., more preferably, , 200-
It is achieved by mixing in a melt extrusion method at 250 ° C. Here, when the resin component and the additive component are simultaneously mixed by the melt extrusion method, the kneading state is significantly lowered because the resin having a high glass transition temperature and the organic compound having a low melting point are present at the same time, and the dispersion state of the present invention is I can't get it.

As a method for achieving the dispersed state of the present invention,
First, a resin component is melt-extruded, and then the additive component is melt-extruded in a sequential extrusion method, or an extruder consisting of three zones is used to melt the resin component in a first zone at a relatively high temperature.
A one-step extrusion method in which the resin temperature is lowered in the zone and the additive components are melt-extruded at a relatively low temperature in the third zone can be adopted.

The resin composition of the present invention can be obtained by, for example, melt-kneading each of the above polymers with a commercially available single-screw extruder, a twin-screw extruder or the like. At that time, an antioxidant such as BHT is used. An ultraviolet absorber, a tin-based heat stabilizer, a lubricant such as stearic acid and zinc stearate, a filler, a reinforcing agent, a dye, a pigment and the like can be added if necessary.

[0038]

The present invention will be described in more detail with reference to the following examples, but the present invention is not limited thereto. The measurements in Examples and Comparative Examples were performed using the following methods or measuring instruments. (1) Weight average particle diameter of rubber: The weight average particle diameter of the rubber-modified styrene-based resin is calculated by calculating the particle diameter of the butadiene-based polymer in the transmission electron microscope photograph taken by the ultrathin section method of the resin composition, and using the following formula. Calculate by

Weight average particle diameter = ΣNi · Di ⁴ / ΣNi · Di ³ (where Ni is the number of butadiene-based polymer particles having a particle diameter of Di. (2) Reduced viscosity ηsp / c rubber-modified styrene Methyl ethyl ketone 18 to 1 g of resin
Add a mixed solvent of 2 ml of methanol and 2 ml of methanol, and add 2 ml at 25 ° C.
Shake for hours and centrifuge at 18000 rpm for 30 minutes at 5 ° C. The supernatant was taken out, the resin component was precipitated with methanol, and then dried.

0.1 g of the resin thus obtained was dissolved in toluene to give a solution having a concentration of 0.5 g / dl, and 10 ml of this solution was placed in a Canon-Fenske viscometer.
At 30 ° C., the number of seconds t _{1 during} which the solution flows was measured. On the other hand, the flowing down time t ₀ of pure toluene was separately measured with the same viscometer and calculated by the following formula. (3) Tensile strength and tensile elongation: Measured by a method according to ASTM-D638. (4) Flexural strength and flexural modulus: Measured by a method according to ASTM-D790. (5) Izod impact strength: Measured by a method according to ASTM-D256 (V notch, 1/4 "test piece) (6) Vicat softening temperature: Measured by a method according to ASTM-D1525, and a scale of heat resistance (7) Melt flow rate (MFR): Measured by a method according to ASTM-D-1238, which is an index of fluidity, and extrusion rate per 10 minutes (g / g under a load of 5 kg and a melting temperature of 200 ° C.). (8) Flame retardancy and drip property VB (Vertical Bur) compliant with UL-94.
Ning) method (1/8 inch test piece). (9) Appearance of molded product Visual judgment was performed. (10) Dispersed state in molded product Inverted metallographic microscope (PEN manufactured by OLYMPUS Co., Ltd.)
The dispersed state was observed in 3).

Specifically, 100 sheets of a 4 mm ² field of view of the surface of the molded product were photographed with a microscope, and the number of dispersed particles having an average particle diameter of 50 μm or more was counted. Here, the average particle diameter is a true spherical shape. The diameter, and the distorted spherical shape is the arithmetic mean of the maximum length and the minimum length.

[0042]

Example 1 (a) Thermoplastic Resin Rubber Modified Styrene Resin (HIPS): Commercially available HIPS was used as the rubber modified styrene resin. a) HIPS-1 (Styron H manufactured by Asahi Kasei Corporation)
8117) Composition: Polybutadiene [(cis 1,4 bond / trans 1,4 bond / vinyl 1,2 bond = 95/2/3 (weight ratio)] 12.3 wt% polystyrene 87.53 wt% mineral oil 0 .17 wt% reduced viscosity ηsp / c = 0.79 weight average particle diameter of rubber 1.25 μm b) HIPS-2 (manufactured by Asahi Kasei Corporation Stylon H)
9010) Composition: Polybutadiene [same as HIPS-1] 9.5 wt% Polystyrene 88.5 wt% Mineral oil 2.0 wt% Reduced viscosity ηsp / c = 0.61 Weight average particle diameter of rubber 1.85 μm (b) ) Manufacture of polyphenylene ether (PPE) After the inside of a stainless steel reactor having an oxygen blowing port at the bottom of the reactor and having a cooling coil and stirring blades inside is sufficiently replaced with nitrogen, cupric bromide is used. 54.8 g, Gee n-
Butylamine 1110 g, and toluene 20 liters,
8.75 kg of 2,6-xylenol was dissolved in a mixed solvent of 16 liters of n-butanol and 4 liters of methanol and charged into a reactor. Oxygen was continuously blown into the reactor while stirring, and polymerization was performed for 180 minutes while controlling the internal temperature to 30 ° C. After the polymerization was completed, the precipitated polymer was filtered off. A methanol / hydrochloric acid mixture was added to this to decompose the residual catalyst in the polymer, and the polymer was thoroughly washed with methanol and then dried to obtain powdery polyphenylene ether (referred to as PPE). Reduced viscosity is 0.55dl /
It was g.

In addition, the PPE and polystyrene (Styron 685, trade name, manufactured by Asahi Kasei Kogyo Co., Ltd.) in a weight ratio of 7
The mixture was mixed at 0/30 and melt-extruded at 350 ° C. in a twin-screw extruder. The obtained pellet is called PPE-MB. (C) Polymer additive (organic phosphorus compound) a) Production of organic phosphorus compound containing hydroxyl group-containing aromatic phosphate ester Phenol 122.7 parts by weight (molar ratio 2.0), aluminum chloride 0.87 parts by weight Part (molar ratio 0.01) was placed in a flask, and 100 parts by weight of phosphorus oxychloride (molar ratio 1.0) was added dropwise at 90 ° C. over 1 hour. 71.7 parts by weight (molar ratio 1.0) of resorcin was added to the produced intermediate and further reacted. In order to complete the reaction, the temperature was gradually raised and finally raised to 180 ° C. to complete the esterification. Next, the reaction product was cooled and washed with water to remove the catalyst and the chlorine content, to obtain a phosphoric acid ester mixture (hereinafter referred to as FR). When this mixture was analyzed by GPC (gel permeation chromatography), diphenylresorcinyl phosphate (hereinafter referred to as TPP-OH), triphenyl phosphate (hereinafter referred to as TPP), and aromatic condensed phosphate ester (hereinafter referred to as TPP) It is called dimer) and the weight ratio is 54.2 / 1.
It was 8.3 / 27.5.

[0044]

[Chemical 5]

[0045]

[Chemical 6]

(D) Triazine skeleton-containing compound As the triazine skeleton-containing compound, commercially available melamine (average particle size 1.6 μm, manufactured by Mitsui Toatsu Kagaku Co., Ltd., trade name fine powder melamine) was used. (It is referred to as ML.) (E) Higher fatty acid amide As higher fatty acid amide, commercially available ethylenebisstearylamide (trade name, Kao Wax EB F, manufactured by Kao Corporation)
F) was used (designated EBS). (F) Preparation and evaluation of composition The above HIPS-1 / HIPS-2 / PPE-MB were mixed in a weight ratio of 36/36/28 (total 100),
30mmφ twin-screw extruder (model AS manufactured by Nakatani Machinery Co., Ltd.)
30) was melt extruded at 260 ° C. to prepare pellets.

Then, with respect to 100 parts by weight of the obtained pellets, the above FR / ML / EBS was added in a weight ratio of 20/16.
The mixture was mixed at a ratio of / 2 and melt-extruded at 220 ° C. by the above twin-screw extruder to prepare pellets. The pellets thus obtained are injected into an injection molding machine (manufactured by Toshiba Machine Co., Ltd. model IS
80A), a test piece was prepared under the conditions of a cylinder temperature of 200 ° C. and a mold temperature of 60 ° C., and various physical properties were evaluated. Table 1
The results are shown in.

FIG. 1 shows a schematic diagram of a typical micrograph of the dispersed state of the test piece.

[0049]

Comparative Example 1 Same composition as in Example 1 (HIPS-1 / H
IPS-2 / PPE-MB / FR / ML / EBS = 36
/ 36/28/20/16/2 (weight ratio)) was simultaneously melt-extruded at 260 ° C. by a twin-screw extruder, and the same experiment as in Example 1 was repeated. The results are shown in Table 1.

FIG. 2 shows a schematic diagram of a typical micrograph of the dispersed state of the test piece.

[0051]

Comparative Example 2 The pellets melt-extruded in Comparative Example 1 were again melt-extruded at 260 ° C. using a twin-screw extruder, and the same experiment as in Comparative Example 1 was repeated. The results are shown in Table 1.

[0052]

[Table 1]

[0053]

The resin composition molding of the present invention is a polyphenylene ether resin molding excellent in mechanical properties such as impact resistance, tensile properties, bending properties and the like and appearance. This molded product is suitable for home electric appliance parts, office automation equipment parts, etc., and plays a large role in the industrial world.

[Brief description of drawings]

FIG. 1 is a schematic view of a typical inverted metallographic micrograph of the surface of a molded body of Example 1.

FIG. 2 is a schematic diagram of a typical inverted metallographic micrograph of the surface of the molded body of Comparative Example 1.

Claims (1)

[Claims] 1. A molded product obtained from a resin composition comprising (A) a thermoplastic resin, (B) polyphenylene ether, and (C) a polymer additive which is liquid at 100 ° C. A polyphenylene ether resin molded article having excellent mechanical properties, characterized in that the number of dispersed particles having an average particle diameter of 50 μm or more in the body is 1 particle / mm ² or less in a unit cross-sectional area.