JPH0657125A - Thermoplastic resin composition - Google Patents

Abstract

PURPOSE:To obtain the resin composition excelling in heat resistance, moldability, oil resistance and mechanical properties and improved in quality. CONSTITUTION:The resin composition is prepared by melt-kneading a modified block copolymer resin (A) which is a block copolymer resin comprising units (A1) derived from a conjugated diene compound and units (A2) derived from a vinylaromatic compound and having an A1/A2 weight ratio of 60/30-97/3 and contains 0.1-5 pts.wt. unsaturated dicarboxylic functional groups per 100 pts.wt. said block copolymer with a modified polyphenylene ether (B), a polyamide (C), a rubber-like polymer (D) and a compound (E) containing carboxyl, an acid anhydride, epoxy, amino or hydroxyl group in the molecule. The component B is present in the continuous phase in the form of a dispersed phase of a mean particle diameter of 0.1-2mum, and particles with diameters of 3mum or below amount to 80% of the particles in the cumulative size distribution curve.

Description

Detailed Description of the Invention

[0001]

The present invention relates to mechanical properties, heat resistance,
The present invention relates to a thermoplastic resin composition having excellent moldability.

[0002]

2. Description of the Related Art Polyphenylene ether resin is a resin excellent in dimensional stability, electrical characteristics, heat distortion resistance under high load, water resistance, etc., and is industrially blended with polystyrene resin. Although it is widely used, it has the major drawback of poor oil resistance and molding processability.

On the other hand, polyamide resin is excellent in mechanical strength, oil resistance, heat resistance and the like and is used in large quantities as one of the most representative engineering plastics. However, this polyamide resin has the drawback that it is lower in properties such as dimensional stability, hygroscopicity, thermal deformation resistance under high load, and impact resistance during drying as compared with other plastics.

Therefore, blending of both resins has been attempted for the purpose of complementing the drawbacks of the two resins by taking advantage of the respective advantages of both resins, and various compositions have been proposed so far. For example, a simple blend of both resins, especially a blended resin obtained by melt mixing, is disclosed (Japanese Patent Publication No. 45-997 and Japanese Patent Publication No. 59-4166).
3 gazette). However, the polyphenylene ether and the polyamide are essentially incompatible with each other, and such a simple blend cannot provide a molded article excellent in mechanical strength.

For this purpose, a copolymer of a styrene compound and an α, β-unsaturated dicarboxylic acid anhydride is blended as a compatibility improver together with polyphenylene ether and polyamide, and a rubber-like substance is further added as an impact resistance improver. Along with the added composition (Japanese Patent Publication No. 59-33614), polyphenylene ether and polyamide, (a) carbon-carbon double bond or triple bond and (b) carboxyl group or acid anhydride group in the molecule as other components. A compound obtained by adding a compound having a functional group such as, for example, melt-kneading (Japanese Patent Publication No. 60-11966) and a composition containing a rubber-like substance (Japanese Patent Publication No. 56-49753) are proposed. Has been done. However, even the compositions obtained by these methods cannot obtain sufficient impact strength. On the other hand, as a method of improving impact resistance, melt mixing of polyphenylene ether functionalized with a compound having a carbon-carbon double bond and an acid anhydride, a carboxylic acid, an amino group or a hydroxy group in the molecule and a polyamide is performed. (Japanese Patent Laid-Open No. 63-500803) has been proposed. However, the resin composition obtained by this method has the drawbacks that the impact resistance is improved, but the molding fluidity is inferior, and the impact resistance is lowered due to retention in the molding machine.

A resin composition comprising a polyphenylene ether resin and a polyamide resin obtained by these methods has excellent heat resistance, moldability, oil resistance, organic solvent resistance and dimensional stability, It has been used in a wide range of fields such as parts, electric / electronic parts, and mechanical parts. However, as described above, conventional compositions containing polyphenylene ether and polyamide have some drawbacks in physical properties, and resin compositions having physical properties in which molding fluidity and impact resistance are well balanced have hitherto been available. Had not been found.
Furthermore, in many cases, the resin composition is heated and melted in a molding machine, and then molded and put into practical use. Therefore, by staying in the molding machine, deterioration of physical properties, particularly impact resistance, does not occur. It is extremely important industrially to develop a resin composition having excellent stability. On the other hand, in order to improve these objects, JP-A-64-79258 discloses that:
A composition containing a specific hydrogenated block copolymer as a rubber-like substance and a composition further containing a specific modified block copolymer have been proposed. However, the composition obtained by such a method does not sufficiently improve the deterioration of the physical properties when retained in the molding machine. In addition, such a resin composition is often used as a pelletized resin composition after being crushed and extruded after the molded product is used, and a material that does not deteriorate in physical properties due to regeneration is provided. Things are desired.

[0007]

The object of the present invention is to significantly improve the balance of molding fluidity and impact resistance in a resin composition containing polyphenylene ether or polyamide as a basic component, and to improve heat stability during molding. It is to provide an excellent resin composition which has little deterioration in properties and physical properties when recycled.

[0008]

Means for Solving the Problems The inventors of the present invention have conducted extensive studies to achieve the above-mentioned objects, and as a result, polyphenylene ether, polyamide and a rubber-like polymer with respect to a resin component in a specific ratio, A resin composition obtained by a method of melt-mixing polyphenylene ether, a specific aliphatic compound and a specific block copolymer resin, and then melt-mixing a polyamide was found to be capable of achieving the object, and based on this finding, Based on this, the present invention has been completed.

That is, the present invention contains (A) at least one polymer block mainly composed of a conjugated diene compound and at least one polymer block mainly composed of a vinyl aromatic compound, and A block copolymer resin having a composition in which the weight ratio of an aromatic compound to a conjugated diene compound is more than 60/30 and 97/3 or less, and at least one functional group selected from unsaturated dicarboxylic acids and their derivatives. The modified block copolymer resin having a content of 0.1 to 5 parts by weight per 100 parts by weight of the block copolymer and 0.1 to 10% by weight, and (B) polyphenylene ether 25 to 70% by weight, C) Polyamide 25-70
%, And (D) 1 to 35% by weight of the rubbery polymer, 100 parts by weight of (E) a carboxylic acid group, an acid anhydride group, an epoxy group, an amino group or a hydroxyl group in the molecule. A resin composition obtained by melt-kneading a mixture containing 0.05 to 5 parts by weight of a compound having, (A) a modified block copolymer resin, (B) a polyphenylene ether,
(E) A compound having a carboxylic acid group, an acid anhydride group, an epoxy group, an amino group or a hydroxyl group in the molecule is melt-kneaded simultaneously to form a pre-stage resin composition, and then the pre-stage resin composition is combined with (C) polyamide. A melt-kneaded resin composition, characterized in that (D) a rubber-like polymer is compounded and / or melt-kneaded at the time of producing a resin composition in the first stage and / or (C) a polyamide, and the component (C) is a continuous phase. Component (B) is present in this continuous phase as a dispersed phase having an average particle size of 0.1 to 2 μm, and 80% of the cumulative particle amount is 3 μm.
It is to provide a resin composition characterized by being m or less.

The present invention will be described in detail below. The modified block copolymer resin used as the component (A) in the present invention means at least one polymer block containing a conjugated diene compound as a main component and at least one polymer block containing a vinyl aromatic compound as a main component. And the weight ratio of the vinyl aromatic compound and the conjugated diene compound is 6
An unmodified base block copolymer resin having a composition of more than 0/30 and not more than 97/3 is prepared by using at least one functional group selected from unsaturated dicarboxylic acids and derivatives thereof in the base block. It is modified so as to be 0.1 to 5 parts by weight per 100 parts by weight of the copolymer resin.

The conjugated diene compound unit constituting the base block copolymer resin includes, for example, a butadiene unit, an isoprene unit and a 1,3-pentadiene unit, and one unit of these units may be contained. Butadiene units are particularly preferred. Further, examples of the vinyl aromatic compound unit constituting the base block copolymer resin include a styrene unit, an α-methylstyrene unit, a vinyltoluene unit, and the like, and even if one unit of these units is contained. Good, or two kinds may be contained, but a styrene unit is particularly preferable. There is no particular limitation on the molecular structure of the block copolymer resin, and for example, a linear chain,
It may be branched, radial, or any combination thereof. Further, regarding the block copolymer resin, if the average content of the vinyl aromatic compound units is within the above range, two or more block copolymer resins having different vinyl aromatic compound unit contents are used. You can also do it.

When the content of the vinyl aromatic compound unit in the block copolymer resin is less than 60% by weight or exceeds 97% by weight, the effect of reducing the particle size and stabilizing is hardly exhibited. The modified block copolymer resin as the component (A) used in the present invention is preferably a resin obtained by grafting an unsaturated dicarboxylic acid or its derivative onto the conjugated diene compound unit of the above base block copolymer. As the unsaturated dicarboxylic acid and its derivative,
Examples thereof include maleic acid, fumaric acid, chloromaleic acid, itaconic acid, cis-4-cyclohexene-1,2-dicarboxylic acid and their acid anhydrides, esters, half alkyl esters, amides, imides, etc. , Β
-Unsaturated dicarboxylic acids and their derivatives, in particular maleic acid and maleic anhydride, are preferred. These unsaturated dicarboxylic acids and their derivatives may be used alone or in combination of two or more.

The content of the unsaturated dicarboxylic acid and its derivative in the modified block copolymer resin is 0.1-5.
The weight range is preferably 0.3 to 3 parts by weight.
If the amount is less than 0.1 part by weight,
A large amount of the component (E) to be used in combination is required, and the color tone is deteriorated due to deterioration of fluidity and coloring, which is not preferable.
The method for modifying the base block copolymer resin as the component (A) with the unsaturated dicarboxylic acid and its derivative can be obtained by melt-kneading the base block copolymer resin, the unsaturated dicarboxylic acid and its derivative with an extruder. The method is preferred from an industrial point of view. The modification method using an extruder is a method that can be easily carried out by those skilled in the art, and the compounding amount of the unsaturated dicarboxylic acid and its derivative, the extrusion conditions and the like are appropriately selected so that the content is within the above range.

The role of the modified block copolymer resin of the component (A) is to reduce the size of the polyphenylene ether particles of the component (B) dispersed in the polyamide of the component (C), which is a continuous phase, and to improve the particle size. This is to obtain a resin composition having a uniform distribution. Further, it has been confirmed from the observation result by an electron microscope that the component (A) enhances the effect of stabilizing the particle diameter of the dispersed phase when the resin composition stays in the molding machine or when the resin composition is regenerated and used again.

The reason why the composition obtained according to the present invention exhibits such a remarkable effect is not clear, but in addition to the reaction product between the polyphenylene ether and the polyamide through the component (E) ( It is presumed that the block copolymer-polyamide reaction product via the component E) has a small dispersed phase and is further stabilized. That is, the action of the component (A) as a dispersant not only causes the composition of the polyphenylene ether and the polyamide to exhibit excellent performance, but also increases the stability of various properties due to the stabilizing effect of the dispersed particle size. It is believed to do.

The polyphenylene ether used as the component (B) in the present invention is represented by the following general formula (1):

[0017]

[Chemical 1]

(Wherein R ₁ , R ₂ , R ₃ and R ₄ represent the same or different residues such as an alkyl group, an aryl group, halogen and hydrogen, and n represents the degree of polymerization). It is a polymer composed of repeating units. Specific examples thereof include poly (2,6-dimethyl-1,4-phenylene) ether and poly (2-methyl-6-ethyl-phenylene).
Ether, poly (2,6-diethyl-1,4-phenylene) ether, poly (2-ethyl-6-npropyl)-
1,4-phenylene) ether, poly (2-methyl-6)
-N-butyl-1,4-phenylene) ether, poly (2
-Ethyl-6-isopropyl-1,4-phenine) ether, poly (2-methyl-6-chloro-1,4-phenylene) ether, poly (2-methyl-6-hydroxyethyl-1,4-phenylene) Examples thereof include homopolymers such as ether and poly (2-methyl-6-chloroethyl-1,4-phenylene) ether, and copolymers composed of repeating units thereof.

Further, these polyphenylene ethers have a degree of polymerization of 0.30 to 1% in terms of intrinsic viscosity [η] (chloroform solution, 30 ° C.) for both homopolymers and copolymers.
Those in the range of 5, preferably 0.40 to 1.0 are suitably used. The polyamide used as the component (C) in the present invention has an amide bond {--NH on the polymer main chain.
Any material that has -C (= 0)-} and can be heated and melted can be used.

Typical examples thereof include 4-nylon, 6-nylon, 6,6-nylon, 12-nylon, 6,10-nylon, polyamide from terephthalic acid and hexamethylenediamine, adipic acid and metaxyl. Polyamides from diamines, adipic and azelaic acids and 2,2'-bis (p-aminocyclohexyl)
-Polyamide from propane, terephthalic acid and 4,4 '
Examples thereof include polyamides of diaminodicyclohexylmethane and copolymerized nylons thereof. Of these, 6-nylon, 6,6-nylon and 6-6,6 copolymer nylon are preferably used alone or in combination.

The rubber-like polymer used as the component (D) in the present invention includes a styrene-butadiene block copolymer, a hydrogenated styrene-butadiene block copolymer, a styrene-isoprene block copolymer and a hydrogenated styrene-polymer. Isoprene block copolymer, ethylene-propylene elastomer, ethylene-based ionomer resin,
Core / shell polymers composed of a rubber-like core and a shell of a non-rubber-like polymer, and the like, particularly a styrene-butadiene block copolymer, and a styrene-butadiene block copolymer in which a part or all of the butadiene moiety is hydrogenated. Is preferred.

It is also possible to use those obtained by modifying these rubbery polymers with epoxy compounds, unsaturated carboxylic acids and their derivatives. Regarding the compounding ratio of the (A) modified block copolymer resin, the (B) polyphenylene ether, the (C) polyamide, and the (D) rubber-like polymer in the composition of the present invention, the above-mentioned (A), (B), (C) ) And (D) component, based on the total amount of (A) modified block copolymer resin is 0.1-10 wt%, preferably 0.5-
In the range of 5% by weight, (B) polyphenylene ether is 25
-70 wt%, preferably 30-60 wt%, (C) polyamide 25-70 wt%, preferably 30-60 wt%, (D) rubbery polymer 1-35 wt%, preferably 5- It is necessary to select it in the range of 20% by weight.

Further, in the present invention, (A), (B),
The proportions of the four components of (C) and (D) are set to the above-mentioned mixing ratios, because when the content of the modified block copolymer resin is less than 0.1% by weight, the effect of reducing the dispersed particle size and the retention in the molding machine are achieved. Even when the particle size stabilizing effect is not exhibited at the time of use or when the resin composition is reused, the amount is more than 10% by weight,
It is economically disadvantageous because the effect is not increased. Further, when the polyphenylene ether content exceeds 70% by weight or the polyamide content is less than 25% by weight, oil resistance and molding processability, which are the characteristics of polyamide, are impaired. The rubber-like polymer is necessary for improving impact resistance, and the compounding amount may be increased according to demand, but if it exceeds 35% by weight, rigidity and heat resistance are deteriorated, which is not preferable.

A carboxylic acid group, an acid anhydride group, an epoxy group in the molecule, which is used as the component (E) in the present invention,
The compound having an amino group or a hydroxyl group at the same time is unsaturated dicarboxylic acid and its derivative, maleic acid, fumaric acid, chloromaleic acid, cis-4-cyclohexene-1,2-dicarboxylic acid and their acid anhydrides, Examples thereof include esters, half-alkyl esters, amides, imides, etc., and α, β-unsaturated dicarboxylic acids and their derivatives, specifically, maleic acid and maleic anhydride are preferable. The unsaturated dicarboxylic acid and its derivative are
They may be used alone or in combination of two or more. The amount of component (E) added is
It is desirable to select in the range of 0.05 to 5 parts by weight, preferably 0.1 to 1 part by weight, based on 100 parts by weight of the total amount of the components (B), (C) and (D). This addition amount is 0.0
If the amount is less than 5 parts by weight, it is difficult to reduce the average dispersed particle diameter of the polyphenylene ether to 2 μm or less, and even if the amount added exceeds 5 parts by weight, the effect is not increased, and it is economically disadvantageous. Is.

Next, a general method for producing the resin composition of the present invention will be described. The composition of the present invention comprises a modified block copolymer resin as a component (A), a polyphenylene ether as a component (B), a polyamide as a component (C), a rubbery polymer as a component (D) and an intramolecular component as a component (E). A carboxylic acid group,
It can be obtained by melt-kneading a compound having an acid anhydride group, an epoxy group, an amino group or a hydroxyl group. The kneading method includes a modified block copolymer resin as the component (A), polyphenylene ether as the component (B), and a carboxylic acid group, an acid anhydride group, an epoxy group, an amino group or a hydroxyl group in the molecule of the component (E). The compound can be obtained by simultaneously melt-kneading the compound and then melt-kneading it with the polyamide of the component (C). The rubber-like polymer which is the component (D) is composed of the component (A),
When the components (B) and (E) are melt-kneaded, the whole amount is blended at the same time, or a part thereof is melt-kneaded simultaneously with the component (C), or the total amount of the component (D) is (C). ) Component may be blended together.

As will be apparent from the following examples, the modified block copolymer resin of the component (A), the polyphenylene ether of the component (B), the carboxylic acid group in the molecule of the component (E),
It is important to melt-knead a compound having an acid anhydride group, an epoxy group, an amino group or a hydroxyl group at the same time. If the component (C) polyamide is blended with these components at the same time, or if any one component is missing, The object of the present invention is not achieved.

The temperature and time for melt-kneading the components (A), (B) and (E) are usually 240 ° C. to 3 ° C.
A temperature in the range of 70 ° C., preferably 280 ° C. to 340 ° C., and a kneading time of 0.1 to 10 minutes, preferably about 0.3 to 3 minutes, are used. Further, the component (A),
The temperature and time for melt-kneading the pre-stage resin composition obtained by melt-kneading the components (B) and (E) and the polyamide (B) are usually 240 ° C to 370 ° C, preferably 250 ° C.
A kneading time of 0.1 to 10 minutes, preferably 0.3 to 3 minutes at a temperature in the range of to 320 ° C is used. Furthermore, the components (A), (B) and (E) are first compounded and extruded, and then the component (C) is introduced at a second point in the extruder downstream from the first compounding operation. It is preferable to carry out continuously with one extruder from the viewpoint of simplifying the process.

If desired, other additives, polymers, plasticizers, lubricants, flame retardants, or inorganic fillers such as glass fibers and carbon fibers may be added to the composition of the present invention. The dispersed particle diameter in the composition of the present invention can be confirmed by an electron micrograph, and the average diameter of the dispersed particle diameter can be calculated as follows.

A transmission electron micrograph (10,000 times) of an ultrathin section prepared from a molded product was prepared to obtain a dispersed particle diameter d.
The number i of particles having i and the particle diameter di is calculated, and the average diameter of the dispersed phase is calculated by the following formula.

[0030]

[Equation 1]

In this case, when the particle shape cannot be regarded as a spherical shape, its minor axis and major axis were measured, and 1/2 of the sum of both was taken as the particle diameter. Also, at least 200 is required to calculate the average particle size.
The diameter of 0 particles is measured. In the particle size distribution measurement, the particles having a smaller particle diameter in the measurement range of the particle diameter were added in order from the larger value, and the integrated particle amount was obtained in each particle category.

[0032]

EXAMPLES Next, the present invention will be specifically described with reference to Examples. The following examples are merely illustrative and do not limit the content of the present invention. The components used in the examples and comparative examples are as follows. (A) component; modified block copolymer resin, A-1; styrene containing 70% by weight of styrene unit
A butadiene block copolymer modified with maleic anhydride.
To 100 parts by weight of the styrene-butadiene block copolymer, 2 parts by weight of maleic anhydride and 0.5 parts by weight of phenothiazine as a stabilizer are blended, and melt extrusion is performed at 290 ° C. using a twin-screw extruder. Manufactured by. When this modified block copolymer resin was dissolved in toluene and subjected to neutralization titration, the content of maleic acid residue was about 0.5% by weight.

A-2: Maleic anhydride-modified styrene-butadiene block copolymer containing 85% by weight of styrene unit. To 100 parts by weight of the styrene-butadiene block copolymer, 2 parts by weight of maleic anhydride and 0.5 parts by weight of phenothiazine as a stabilizer are blended, and melt extrusion is performed at 290 ° C. using a twin-screw extruder. Manufactured by. When this modified block copolymer resin was dissolved in toluene and subjected to neutralization titration, the content of maleic acid residue was about 0.5% by weight.

Component (B): polyphenylene ether, B-1; poly (2,6-dimethyl-1,4-phenylene) ether B-2 having a viscosity of 0.62 (in chloroform at 30 ° C.) B-2; Poly (2,6-dimethyl-1,4-phenylene) ether (C) component having a viscosity of 0.54 (in chloroform at 30 ° C.): polyamide, C-1; 6-nylon (manufactured by Asahi Kasei Kogyo KK) , Nylon SBR) C-2; 6,6-nylon (Asahi Kasei Kogyo KK, Leona 1300) (D) component: rubber-like polymer, D-1; styrene-butadiene copolymer (Asahi Kasei Corporation) Manufactured by Tauprene 200) D-2; hydrogenated styrene-butadiene copolymer (Kreton G-1650 manufactured by Shell Co.) D-3; maleic anhydride-modified ethylene-propylene copolymer (d) Son Chemical Co., Ltd., Eguzero -VA-180
3) Further, the obtained resin composition was evaluated according to the following method.

Injection molding machine (IS80E manufactured by Toshiba Machine Co., Ltd.)
A test piece was prepared with PN, a cylinder temperature of 280 ° C., and a molding cycle of 1 minute), and the following physical property measurements and tests were performed. (1) Izod impact strength: JIS K-7110,
23 ° C, with notch (2) Heat distortion temperature: JIS K-7207, 4.6
kg / load (3) Residence test in molding machine: IS80 manufactured by Toshiba Machine Co., Ltd.
After using the EPN injection molding machine, the cylinder temperature was 310 ° C., the molding cycle was 10 minutes, and the mixture was retained in the molding machine.
A test piece was prepared, and an average diameter of dispersed particles was determined from a transmission electron micrograph of an ultrathin section prepared from the test piece.

(4) Regeneration test: A test piece obtained by an injection molding machine is put into a crusher, and the crushed product is 280 by an extruder.
The pellet was re-pelletized at 0 ° C., and a test piece was prepared using an injection molding machine. Similarly, the average diameter of dispersed particles was obtained from this test piece.

[0037]

Examples 1 and 3 Poly (2,6-dimethyl-1,4) with an intrinsic viscosity of 0.62 (30 ° C. in chloroform).
-Phenylene) ether (PPE), maleic anhydride,
And the modified block copolymer resin A-1 (Table 1, A component; said A-1) at the blending ratios shown in Table 1, respectively, twin-screw extruder (Z manufactured by Werner & Pfleiderer).
SK-25), extruded and kneaded at 300 ° C. and 300 rpm, and pelletized to obtain a first-stage composition. Then, together with this composition, 6-nylon, C-1 (Table 1, C component; C-1 above), styrene-butadiene copolymer, D
-1 (Component D in Table 1, D-1) was similarly fed to a twin-screw extruder, extrusion kneaded under the same conditions, and pelletized.
Then, various tests were conducted by the above-mentioned method. The evaluation results are shown in Table 1.

[0038]

Example 2 In Example 1, the modified block copolymer resin was changed from A-1 to A-2, and the mixture was extrusion kneaded under the same conditions and pelletized.

[0039]

Comparative Example 1 In Example 1, all components were simultaneously fed to a twin-screw extruder and extrusion kneaded.

[0040]

Comparative Example 2 In Example 1, polystyrene was blended instead of the modified block copolymer and extruded in the same manner.

[0041]

Comparative Example 3 In Example 1, the modified block copolymer was blended in the second stage.

[0042]

Comparative Example 4 In Example 1, the modified block copolymer was not compounded and extruded in the same manner. The evaluation results are shown in Table 1.

[0043]

Example 4 In Example 1, the component (B) was replaced with PPE having an intrinsic viscosity of 0.54 (30 ° C., in chloroform), B-.
Instead of 2, the components (B), (A), and (E) were introduced from the first raw material feed port at the blending ratio shown in Table 2 from the second feed port provided further downstream of the first feed port ( C)
Ingredients (D) Ingredients for Twin Screw Extruder (Werner & Pfl
supplied to the eiderer ZSK-25), and 300
The mixture was extruded and kneaded at 300 ° C. and pelletized into pellets.

[0044]

Example 5 In Example 4, the component (A) was used as the modified block copolymer resin of A-2, the component (C) was used as C-2, and
The component (D) was extruded, kneaded and pelletized in the same manner as in the case of D-2.

[0045]

[Comparative Example 5] In Example 5, the component (A) was supplied from the second raw material feed port, extrusion kneaded in the same manner, and pelletized.

[0046]

[Example 6] In Example 5, the component (D) was replaced with D-3, and the mixture was extrusion kneaded in the same proportion as in Table 2 and pelletized.

[0047]

[Comparative Example 6] In Example 6, the component (A) was removed, and extrusion kneading was carried out in the same manner to form pellets. The evaluation results are shown in Table 2.

[0048]

[Table 1]

[0049]

[Table 2]

[0050]

The resin composition of the present invention is intended to further improve the excellent heat resistance, moldability, oil resistance and mechanical properties of the composition comprising the original polyphenylene ether, polyamide and rubber-like polymer. Can be done. Further, it is possible to provide a material in which the physical properties are not deteriorated when retained in the molding machine and the physical properties are not deteriorated by regeneration.

Therefore, the resin composition of the present invention is useful for various uses such as automobiles, electric / electronic parts and the like, and further expansion of uses can be expected.

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Claims (3)

[Claims] 1. A polymer containing (A) at least one polymer block containing a conjugated diene compound as a main component and at least one polymer block containing a vinyl aromatic compound as a main component, and conjugated with a vinyl aromatic compound. A block copolymer resin having a composition in which the weight ratio of the diene compound is more than 60/30 and not more than 97/3, in which the content of at least one functional group selected from unsaturated dicarboxylic acids and their derivatives is 0.1 to 5 per 100 parts by weight of the block copolymer
0.1 to 10 parts by weight of the modified block copolymer resin is used.
% By weight and (B) polyphenylene ether 25-70% by weight, (C) polyamide 25-70% by weight, and (D)
Resin composition consisting of 1 to 35% by weight of rubber-like polymer 1
A resin composition obtained by melt-kneading a mixture containing 0.05 to 5 parts by weight of (E) a compound having a carboxylic acid group, an acid anhydride group, an epoxy group, an amino group or a hydroxyl group in the molecule (E). 2. A modified block copolymer resin (A), (B)
Polyphenylene ether and (E) a compound having a carboxylic acid group, an acid anhydride group, an epoxy group, an amino group or a hydroxyl group in the molecule are melt-kneaded at the same time to form a pre-stage resin composition. ) A resin composition melt-kneaded with a polyamide, characterized in that (D) the rubber-like polymer is blended at the time of producing the pre-stage resin composition and / or (C) the polyamide and melt-kneaded. The resin composition according to item 1. 3. The component (C) forms a continuous phase, in which the component (B) is present as a dispersed phase having an average particle size of 0.1 to 2 μm, and 80% of the cumulative particle amount is particles. The resin composition according to claim 1 or 2, which has a diameter of 3 µm or less.