JPH01139636A - Thermoplastic resin composition with high stress cracking and impact resistances - Google Patents

Abstract

PURPOSE:To obtain the title composition outstanding in the appearance of the molded products therefrom, by incorporating a polyphenylene ether resin, etc., with specified amount of a preliminarily kneaded composition comprising a polyolefin resin and a specific resinous copolymer. CONSTITUTION:The objective composition can be obtained by incorporating a total of 100 pts.wt. of (A) 20-80 pts.wt. of a polyphenylene ether resin [e.g., poly(2,6-dimethyl-1,4-phenylene)ether] and (B) 80-20 pts.wt. of a styrene resin (e.g., polystyrene, rubber-modified high-impact polystyrene) with (C) 1-20 pts.wt. of a preliminarily kneaded composition comprising C1: 30-70 pts.wt. of a polyolefin resin (e.g., polyethylene, polypropylene) and C2: 70-30 pts.wt. of a resinous radial tereblock copolymer of the formula (A-B)nR (A is vinyl aromatic block; B is polymer diene block with its unsaturation degree specifically reduced; R is coupling agent; n is 3 or 4) with the content of the block A of 50-60wt.% and number-average molecular weight of 30,000 to 300,000.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a plastic resin composition for thermal use that has excellent impact resistance and stress cranking properties. More details tl! ,(a)
Polyphenylene ether m1lhz 20-80 parts by weight,
(b) Sf V N system tree 8 effect 80~20 N jl
s % and (cl polyolefin resin 60-703L
jls and l represented by the general formula (A-B)nR (where A is a vinyl aromatic block and B is the degree of unsaturation reduced to less than 10 times the initial degree of unsaturation by hydrogenation) L @
The present invention relates to a resin composition prepared by blending a pre-crosstalk composition comprising a body diene block, an Rfl coupling agent, and 70 to 3 parts by weight of a resinous copolymer with a uniform % ratio of n = 6 or 4.

[Conventional technology]

Polyphenylene ether is a resin that has attracted attention in foreign exchange in recent years due to its excellent mechanical properties, electrical bondability, and heat resistance, as well as its low water absorption and poor dimensional stability. However, Since polyphenylene ether resin alone has inferior processability and impact strength, in many industrial applications it is used as a blend with polystyrene or rubber-reinforced polystyrene.

- It is also a trend in recent years that the shapes of industrial parts, electrical parts, etc. are becoming more complex, and the properties of resins are also becoming more sophisticated.
Especially in terms of impact resistance and oil resistance, the resins mentioned above are no longer adequate for these uses.

In order to meet these requirements, several techniques have been proposed for adding polyolefin-based monomers.

For example, Japanese Patent Publication No. 42-7069 proposes a resin composition consisting of a polyphenylene ether resin and a polyolefin system, but the intended improvement effect is insufficient.

Increasing m of the polyolefin resin in order to obtain a light effect may result in peeling of the molded product, which is undesirable.

JP-A-52-125560 discloses (a) polyphenylene ether resin 11M, (t) l Sunalene thread m resin, (
A resin composition comprising a cl sialtele block copolymer is described. This invention is a system that does not contain a polyolefin monomer, and in a preferred embodiment, the radial telesol copolymer (c) has an elasticity of 1 to 45 klk based on the amount of vinyl aromatic compound. It has a mesh structure and is not hydrogen-cooled. Japanese Patent Publication No. 53-7
No. 1158 discloses (a) polyphenylene ether m
tlL(t)l# Listerene resin, (c) a pre-blended mixture of a polyolefin-based monomer and a hydrogenated block copolymer, and (d) a resin composition consisting of a hydrogenated block copolymer is described. . However, the block copolymers used are specific elastomers that are hydrogenated block copolymers. In order to achieve the desired effect, it is essential that the corresponding hydrogenated block copolymer coexists with the premixed mixture alone, rather than the light component, as clearly stated in the experiment. is indicated. Furthermore, Japanese Patent Publication No. 1988-88960 describes a resin composition consisting of (a) polyphenylene ether l[iz% (b) A-B-A type block copolymer, and (c) polyolefin m@ body. It is clearly not clear. According to the text description and examples, the above invention is a system that does not contain polystyrene resin. and,
(t) A specific A-B-A type block copolymer is used in which precrossing is carried out for l/& min and (axi min), and the block copolymer (b) has rubber-like elasticity. Also,
JP-A-58-103557 clearly discloses a resin composition consisting of (al polyphenylene ether tree 11, (b) polyolefin 1 polymer, and diblock or 9 halacyal teleblock copolymer. This invention is a system that does not contain borinutylene thread tree I1w, and does not disclose that preliminary crosstalk is performed.
Examples of Publication No. 3054 include ta+polyphenylene ether, (b) styrene m11m, (c) A −
A resin composition comprising a block copolymer and various ldl elastomers having a B content and an A component content of 70 to 9D is described.

On the other hand, in U.S. Patent No. 3,835.200, A.
-B-A type, and the lid containing component A is 65-85XJ
A technique is disclosed in which 10 to 801 amounts of Sa are added to each block copolymer. Both inventions are systems that do not contain one polyolefin, and furthermore, the block copolymerization is the specific block copolymerization described above. On the other hand, Hosoishi et al.
Techniques for polymer blending polyolefin-based monomers into polyphenylene ether resin and polystyrene-based gruel are disclosed in JP-A-53-124559 and JP-A-5
6-51356, JP 58-103556, JP 60-118739, JP 60-1
20747, JP-A-60-120748, etc.

[Invention or problem to be solved] Among the techniques presented above, compositions obtained by implementing techniques sr for improving impact resistance have a certain degree of improvement effect on falcon resistance, etc. Depending on the purpose of the object being hammered, it may not be satisfactory.

By the method presented above, in order to achieve all the improved effects such as a satisfactory high degree of impact resistance, the polyolefin polymer and block copolymer described hereinabove may be blended. In such a case, peeling of the molded product and deterioration of external rigidity and heat resistance of the topography product occur, which is extremely undesirable from a practical standpoint.

In addition, in the process of achieving the present invention, it was found that the stress cracking property of the above-mentioned technique was improved, but it was not enough to solve the problem in practical use. .

This 8A has excellent impact resistance and stress clarity without reducing the excellent performance of polyphenylene ether resin.
Polyphenylene ether type m with good properties and molded product appearance
This was done to obtain a fat composition.

The present invention consists of a polyolefin resin of 60 to 7 OJkt parts and a general formula (A-B)nR (wherein, 8 is a vinyl aromatic block, and B is the initial degree of unsaturation by hydrogenation. The diene block is reduced to less than 10%, and the diene block is combined with the diene block, R is a coupling agent, n is an integer of 6 or 4, and the content of component A is more than 10%.
We discovered that a significant improvement effect could be obtained by using a pre-crosstalk composition comprising 70 to 60 parts of a resinous copolymer (less than 70 parts by weight), and we were excited based on the following.

[Easy means and action for solving the interpolation point] That is, the present invention provides (IL) polyphenylene ether resin 20 to 80]
kjifi15 and (kl) polystyrene resin 80-2
0 parts by weight, a total of 1001 L members, and (c) polyolefin tree @ 60-70! It is represented by the quantitative part and the general formula (A-B)nR (where 8 is a vinyl aromatic block, and B is a compound whose degree of unsaturation is reduced to 10% or less of the initial degree of unsaturation by hydrogenation. cm coalesced diene block, R is a coupling agent, n is an integer of 6 or 4, and the content of component A is more than 50 but less than 65). It is a flexible resin composition.

One of the features of the present invention is that polyphenylene ether resins can be used in place of conventional elastomers to improve the impact resistance and stress cranking resistance of molded products without compromising their excellent performance. , polyolefin system 1 combination and (A-
B) nR-type fatty polyester block copolymer (where A is a vinyl aromatic b block and B is a copolymer with unsaturation reduced to less than 10% of the initial unsaturation by hydrogenation) Combined diene block, R is a coupling agent, n is 6 or 4, and the content of A component j# is 65% when it exceeds 50.
] using a pre-mtK strain composition with LjIr% unfi).

When the morphology of the resin composition of the present invention is observed using an electron microscope, it forms a structure with curvature. That is, the polyolefin resin and (
A-B) The nR-type resinous dental block copolymer is effective when dispersed alone, and the resin composition of the present invention is effective when dispersed alone in a homogeneous tree matrix composed of a polyphenylene ether resin and a polystyrene resin. It is dispersed as fine particles with a volume average particle diameter of 0.06 to 0.65μ, and its microstructure is a two-layer S structure in which a dispersed polyolefin polymer is covered with a resinous block copolymer. There is.

The shelf fat of the present invention? It is estimated that the #A feature has a kite-shaped double-layered body, which dramatically improves the ability of the matrix phase of polyphenylene ether resin topolysterene resin to be absorbed into the dispersed polyolefin polymer. be done. As a result, stress transmission between both phases was carried out smoothly, and it is presumed that the objectives of the present invention, such as significant improvement in strength and stress crack resistance, were achieved.

In order to exhibit such a microstructure and the effects of the present invention, it is essential to pre-knead the polyolefin polymer and the (A-B) nR type resinous R-Artele block copolymer in a bath melt. At the same time, the selection of the block copolymer is a major factor. The present invention is based on these several points, (A
-B) An nR type resinous block copolymer, the content of component A is more than 503 kt and less than 65 i, and the fine average molecular weight is 30.000 to 300.000.
Component B is a specific resinous block co-ML@body which has been cooled to 10% or less of the initial degree of unsaturation.
r use, and the ratio of the polyolefin polymer and the above resinous block copolymer to 60-70/70-3
This is achieved by setting the ik quantity to 0 (ik).

In particular, the block copolymer has a structure of (A-B)nR, the content of the A component exceeds 501 plates φ and is less than 65 mN%, and the number average molecule 1 is 30,000 to 3 [10,000
By selecting a specific block copolymer in which BM, min is less than 10% of the initial unsaturation, water is added to the two-layer structure of the present invention, mJ. Stress transmission between the matrix phase of polyphenylene ether resin and polystyrene resin and the dispersed polyolefin metal phase is carried out very smoothly, and the effects of the present invention are dramatically improved.

The resin composition of the present invention obtained by the above method has no deterioration in appearance, heat resistance, and elasticity of the molded product, with no peeling of the molded product compared to the resin composition that has been crushed by the conventional technology. Excellent impact resistance, nutres crack resistance, and large width.
It is a resin composition and has become a molding material with great industrial value.

The polyphenylene ether used in the resin composition of the present invention m ah h formula (wherein (L, (L', (L" and q"' are hydrogen, halogen, hydrocarbon group, halohydrocarbon group, respectively)
homopolymers and copolymers selected from the group consisting of hydrocarbonoxy groups and halohydrocarbonoxy groups, where n represents the total number of monomer units and is at least 80 ah).

Preferred as the symbol is BoIJ (2,6-dimethyl-1゜4
-phenylene) ether and 2,6-dimethylphenol,! =2.3.6-) It is a copolymer of rimetherphenol. It is safe to use an amount of 20 to 80 L. If it is less than 20 parts, the rigidity and heat resistance of the composition will decrease, and if it exceeds 80 parts, the viscosity during lip treatment will be undesirable and the molding part will be difficult to fill.

Specifically, the styrenic resin used in the present invention is:
- Numerical formula (in the formula, R is hydrogen, an alkyl group having 1 to 4 carbon atoms, or fc
is a halogen, 2 is a vinyl group, hydrogen (9) is a 7'cI member selected from the group consisting of an alkyl group having 1 to 4 carbon atoms, and p is 1 to 5) is a vinyl aromatic group in which M is a vinyl group; It is derived from a single base and has at least 50 mol% of combined units at 7'C3.

Suitable styrenic resins for the present invention include polystyrene, polyisobutylene, alpha-methylstyrene, and other monomers, as well as rubber-modified impact-resistant styrenic resins, such as natural resins!
It is polyethylene modified with fC and syncytial rubber. or,
Examples of styrene-containing polymers include styrene-acrylonitrile copolymer, styrene-acrylonitrile-α-methylstyrene copolymer, sunalene-acrylonitrile-butadiene copolymer, and styrene-maleic anhydride copolymer. . Styrene resin 1 piece, 80-20
Use in 1L portion.

The polyolefin polymers used in the present invention include polyethylene, polypropylene, polyisobutylene, conjugates of ethylene and propylene, ethylene and organic esters such as enalene vinyl acetate, ethylene ether acrylate, ethylene methyl acrylate. It can be a copolymer with etc. Further, for example, these materials may be chemically modified with pyrohydric maleic acid, maleic acid, or the like. These are commercially available or can be made by known methods.

The specific (A-B)nR type resinous aluminum block copolymer used in the present invention is a block copolymer represented by the following formula.

(A-B) nR Here, Aa vinyl aromatic diblock B is a cross-merged diene block whose degree of unsaturation has been reduced to 10 times or less of the initial degree of unsaturation by hydrogen cooling, R is a coupling agent, n is 6~
For an integer of 4, the content of component A is more than 50% by weight and less than 65% by weight. If the ratio of component A is less than 50, the appearance of the molded product will deteriorate as the elastomer cools. Moreover, if it exceeds 65]t Jt % k, peeling will be observed in the molded product and the improvement in cracking property will not be sufficient. Further, when the degree of unsaturation of the B component is reduced to 10% or less by adding X element, further improvement in cracking property is observed, and the stability against heat is also significantly improved. The number average molecular weight of the block copolymer is 20.000 to 400,000, preferably 30.
．． 000 to 300.000. The term "resin-like" as used herein refers to a rigid material with a Young's modulus of 18.000 kfl/Cm" or more, which is distinguished from a rubber-like elastic material.

In cases where the above-mentioned fold conditions are not satisfied, the intended improvement effect will be poor.

The above-mentioned A component, the vinyl aromatic prostyrene, includes styrene, 0-methylstyrene, p-methylstyrene, p-cert7'nalstyrene, 1,3-dimethylstyrene, α-methylstyrene, vinylnaphthalene, vinyl Among anthracene and the like, a particularly numerical example is styrene.

These may be used as a mixture of two or more of them. As a friend, as a raw material for m-combined dienglock,
Diolefins having a pair of conjugated dime bonds having 1 to 8 carbon atoms, such as 1.6 butadiene, 2-methyl 1.
6-Butadiene (Isoprene L2.3-dimethyl1.3
Examples include butadiene, 1,3-butadiene, 1,3-hexadiene, etc.;
．． Examples include 6-butadiene and isoprene.

These may be used not only as a single glaze but also as a mixture of two or more. These can be manufactured by known methods.

Polyolefin system 1 combination and (A-B)nRff1a(
The ratio of the pre-crosstalk composition of the greasy dental teleblock co-toggle is 60-70/70-30 (3! waist part). If the polyolefin resin exceeds 70 parts, the molded product in the final resin composition will tend to peel off, which is not preferable. On the other hand, if it is less than 60 parts, the desired improvement effect is desired in the final resin composition.

This pre-kneaded composition is used in an amount of 1 part or more and less than 20 m parts per 100 parts by weight of (a) #IJ phenylene ether resin and (b) styrene resin.

The method for producing the pre-kneaded composition according to the second aspect of the present invention is carried out using extruders, kneaders, etc., which are generally used for kneading resins, and bath melting machines, such as roll mixers, Banbury mixers, etc., which are further used for the mixing of rubber. The kneading method is used.

As a method for obtaining the resin composition of the present invention, a bath melt mixing method using an extruder, kneader, roll mixer, Banbury mixer, etc. can be used.

Preferably, it is produced by an extruder.

The resin composition of the present invention thus obtained can be processed into sheets, foams, films, injection molded products of various shapes, hollow moldings, etc. by any conventionally known molding method, such as extrusion molding, injection molding, and blow molding. It can be easily molded into a wide variety of practically useful products such as molded products, pressure-formed products, and vacuum-formed products.

Depending on the purpose, the resin composition of the present invention may contain conventionally known additives, such as phosphoric acid esters, melamine flame retardants, halogen flame retardants, flame retardants such as Red Link, polybutene, and low molecular weight i1#. IJ ethylene, mineral oil, epoxidized soybean oil, polyethylene glycol, plasticizers such as 11i fatty acid esters, phosphite esters, hindered phenols, alkanolamines, acid amides, dinaocarbamate metal salts One or more of female fixing agents such as , inorganic sulfides and metal oxides, extreme ultraviolet absorbers, coloring agents, and mold release agents may be added.

In addition, the m-acid of the present invention may contain reinforcing fillers, such as glass fiber, glass flakes, mica, carbon fiber, etc.)
Contains A-fiber, various metal flakes, asbestos, wollastonite, calcium carbonate, Merck, mica, zinc oxide, fused potassium natan, titanium oxide, glass peas, etc., and has extremely high rigidity and heat resistance. It is possible to obtain a resin composition containing fillers.

As a lightening agent, if you choose @'s conductive light horizontal stiffness for carbon-based fibers,
The composition of the present invention is no exception to the fact that functions such as pigeon-electricity and heavy spider wave shielding properties can be imparted.

〔Example〕

EXAMPLES Hereinafter, the present invention will be explained with reference to examples, but the present invention is not limited to the following examples. In addition, in the examples, "mu*se" is shown in the part, and the physical property values were measured by the following method.

O heat resistance; using an injection molded test frame with a thickness of 1/4', J
Load H18,6kg/Cm according to IS-K 7207
``Measure the heating deformation temperature (hereinafter abbreviated as ``T'').

・Drop @impact test: Conforms to JISK7211.

Test piece; length 15011% width 150511. thick δ2 iris,
1 center date product; 1,320 g, 1/2"H rocket; flexural modulus: Based on A8TM-D 790.

O stress cracking property: The resin composition was molded at 250°C using a compression molding machine, and the thickness was 5 mm, 1JXA'12.
A test piece sample with a length of 7 and a length of 1200 is prepared. This test piece was annealed at t-80'C for 24 hours in a hot air dryer to remove any residual adhesion. Next, one end of this test piece was held in a creep rupture measuring machine, and one end was placed in the other groove.
After setting the seasonal load] L, apply shaft grease D (Sato Tokushu Yureki) 0.29 at the position 20 meters from the load 1 set side, and then keep it at 23'C, 50cIj and low humidity. Measure the darkness at the top of the fracture. The longer the time until breakage, the better the stress crankability.

O Peelability: Use an injection molded test piece with a thickness of "/e" and visually inspect the fracture surface.

Evaluation rank ○; No peeling at all Δ; Slight peeling ×; Particularly severe peeling ・Appearance: The gloss on the date side of an injection molded test piece with a thickness of 1/8' was measured using a color computer 5M3CH (oga tester).
The degree of gloss is shown in numerical values. The larger the value, the better the gloss.

In addition to the raw materials shown in Table 1, all of the following raw materials were used in the Examples and Comparative Examples.

Polyphenylene ether; η8p/. -0,56 (chloroform 0.5% bath solution) of poly(2,6-dimethylphenylene-1,4-ether).

(hereinafter abbreviated as PPE) Styron QH405; manufactured by Asahi Kasei Kogyo Co., Ltd., No. 1 Impact Borisnare.

Stylon 685; manufactured by Asahi Kasei Industries, Ltd., polyethylene polyenalene M-1703; manufactured by Asahi Kasei Industries, Ltd., low density polyethylene (MFRO, 3, density 0.917) polyethylene M-6520; manufactured by Asahi Kasei Industries, Ltd. , low density polyethylene (MFR20, density 0.915, 1 polyenalene F-2270; manufactured by Asahi Kasei Kogyo Co., Ltd., low density polyethylene (MFR7-0, density 0.922) & IJ ethylene LM-24088: manufactured by Asahi Kasei Kogyo Co., Ltd. Co., Ltd., M@-shaped low density polyethylene (MFRQ, 8, density 0.924) JSREP07P; Enalene-propylene turbo polymer (EPDM) manufactured by Japan Synthetic Rubber Co., Ltd. (Mooney viscosity 70, ratio] L0.86) [ Production of hydrogenated radial teleblock copolymer] Using n-butyl linium as a catalyst in a cyclohexane bath medium under a nitrogen atmosphere, 70% gold of part A1 was prepared at about 70°C according to the monomers listed in Table 1. Together, seven months
After 1 part of B is substantially completely combined, 1 part of monomer B is added and 1 part is combined. After the added monomers were substantially completely polymerized, 2 parts of A2 and 2 parts of B were sequentially combined in the same manner, and 4 moles of 1 part was added to the n-butyllithium used in the polymerization. It was produced by adding silicon tetrachloride gold foil and causing a coupling reaction.

Each block copolymer obtained contained 2.4% as a stabilizer.
0.5 parts of each of -di-tθrt-butyl-p-cresol, trisnonylphenyl phosphite and phenothiazine were added to the block copolymer ioomms.

Water accumulation can be carried out using various hydrogenation catalysts, such as nickel supported on diatomaceous material, Raney nickel, copper chromate, molybdenum sulfide, and fc microfine platinum supported on low surface catalytic converters or other hydrogenation catalysts. This can be done using maple etc.

The additive may be added at any desired temperature and pressure, for example from atmospheric pressure to 21 Q kg 7cm", at a pressure of 7-70 cm/CrrL" and at a temperature of 24-316°C, from 0.1 to It can be carried out for 24 hours, preferably 0.2 to 8 hours. In addition, in Table 1, the charged monomer t is O
Step 1 means that one of the steps is omitted and the next step is omitted.

B in Table 1 (L represents butadiene, St represents styrene.

Example 1 First, 50 parts of Polyenare νM-1703 (manufactured by Asahi Kasei Industries, Ltd.), 150 parts of the block copolymer shown in Table 1, and 2 parts of phenothiazine as an antioxidant were added to Nakata Ni Kikai Co., Ltd.
Using a NAS type twin-screw vent type extruder made by the company, a temperature of 200
℃, extruder rotation ti60 rpm, discharge amount 4 kg/
A pre-mixed wire composition is prepared by melt-kneading at hr. Next, 868 parts of PP, 32 parts of Stylon QH405 (manufactured by Asahi Kasei Industries, Ltd.), 12 parts of the above preparatory crosstalk composition, and 0.0 parts of Mark AO30 (manufactured by Adeka Argus) as a stabilizer.
65 The IK heel was mixed in a derender, extruded using a twin-screw extruder at a maximum cylinder temperature of 290°C to obtain pellets, and a test piece was created using an injection molding machine at 260°C for testing. provided.

The test results are shown in Table 2.

Examples 2 to 6 Example 1 except that block copolymers 2 (Example 2) and 6 (Example 6) in Table 1 were used in place of the first red block copolymer 1 in Example 1. 9. Create a test piece and conduct the test using exactly the same procedure as in step 9.

The results are shown in Figure 2.

Examples 4 to 7 Polyethylene M-652 () (Example 4) and polyethylene F-2 were added to the polyethylene M1703' in Example 1.
270 (Example 5), polyethylene LF-24088 (
Example 6) and J8REPO7F (Example 7) were used, except that test pieces were prepared and tested in exactly the same manner as in Example 1. All seven results are shown in Table 2.

Example 8 Except for the kneading ratio of dabolienalene u1703 in Example 1 and block copolymer 1 in Table 1, t7:3,
A test piece was prepared in exactly the same manner as in Example 1 and subjected to the test. The results are shown in the second layer.

Example 9 A test piece was prepared in exactly the same manner as in Example 1, except for adding t-18 parts 6S of the I pre-kneaded composition in Example 1,
Tested. The results are shown in the second layer.

Comparative Example 1 In Example 1. A test piece was prepared in exactly the same manner as in Example 1, except that the block copolymer 1 of the first world was replaced with a block copolymer 1 that was not hydrogenated, and was subjected to the ° test.

The results are shown in Table 2.

Comparative Example 2 In Example 1 (, - Turtle 1 capsule block copolymer 1'
i. A test piece was prepared in exactly the same manner as in Example 1, except that the first block copolymer 4 was used, and the test piece was subjected to the test.

The results are shown in the second layer.

Comparative Example 6 A test piece was prepared in exactly the same manner as in Example 1, except that the first red block copolymer 1t1 in Example 1 was replaced with the first red block copolymer 5, and was subjected to a test. The results are shown in Table 2.

Comparative Example 4 In Example 1. A test piece was prepared in exactly the same manner as in Example 1, except that block copolymer 1 in Table 1 was replaced with block copolymer B in Table 1, and was subjected to the test. The results are shown in Table 2.

Comparative Example 5 Oboriethelene M1703z in Example 1! :1st
A test piece was prepared in exactly the same manner as in Example 1, except that the kneading ratio with block copolymer 1 shown in the table was changed to 8:2, and was subjected to the test. The results are shown in Table 2.0 Comparative Example 6 In Example 1. f polyethylene M1703 and 41:
A test piece was prepared in exactly the same manner as in Example 1, except that the kneading ratio with block copolymer 1 was changed to e2:8, and the test piece was subjected to the test. The results are shown in Table 2.

Comparative Example 7 A test was carried out in exactly the same manner as in Example 1, except that 12 parts of polyethylene M1703 was added in place of the I pre-kneaded composition in Example 1. The results of Example 1 are shown in Table 2.

Comparative Example 8 A test sample was subjected to the same procedure as in Example 1 except that 1t-12s of the first different block 1 was added instead of lj i /pre-kneaded composition to Example 1. The results are shown in the second layer.

Examples 10 to 11 and Comparative Example 9 Each component was blended in the fc parts shown in the sixth example, and tested in the same manner as in Example 1. The results are shown in Figure 4.

[Effects of the Invention] The present invention provides polyphenylene ether fruit trees 1ff! 2>
3) It is possible to completely improve the impact resistance and stress cracking properties without reducing the original properties such as rigidity and heat resistance, which will dramatically expand the field of application of polyphenylene ether resins. Yes, it has great industrial significance.

Patent applicant: Asahi Kasei Industries, Ltd.

Claims (6)

[Claims] (1) Total of (a) 20 to 80 parts by weight of polyphenylene ether resin and (b) 80 to 20 parts by weight of styrene resin 1
00 parts by weight, (c) polyolefin resin 30 to 70 parts by weight, and represented by the general formula (A-B)_nR (here, A
is a vinyl aromatic block, B is a polymeric diene block whose degree of unsaturation has been reduced to 10% or less of the initial degree of unsaturation by hydrogenation, R is a coupling agent, n is an integer of 3 or 4, and component A is A thermoplastic resin composition comprising a pre-kneaded composition comprising 70 to 30 parts by weight of a resinous radial teleblock copolymer (with a content of more than 50% by weight and less than 65% by weight) (2) A patent claim in which the polyolefin resin is one selected from polyethylene, polypropylene, polyisobutylene, a copolymer of ethylene and propylene, a copolymer of ethylene and an organic ester, and a mixture of any of the above. The thermoplastic resin composition according to item 1 in the range of (3) If the A component of the resinous radial teleblock copolymer represented by (A-B)_nR exceeds 50% by weight, 65
Less than weight%, number average molecular weight 30,000-300,00
The thermoplastic resin composition according to claim 1, which is a resinous copolymer having 0 (4) Polyphenylene ether resin is poly(2,6-
The composition according to claim 1, which is dimethyl-1,4-phenylene) ether. (5) The thermoplastic resin composition according to claim 1, wherein the styrenic resin is polystyrene. (6) The thermoplastic resin composition according to claim 1, wherein the styrenic resin is rubber-modified high-impact polystyrene.