JPS63241063A - Resin composition - Google Patents

Abstract

PURPOSE:To provide a resin compsn. which has excellent mechanical strengths, gives molded sheet products having excellent falling dart impact strength and oil resistance and has excellent moldability, consisting of a polyphenylene ether resin, a crystalline polyamide and a non-crystalline to lowly crystalline polyamide. CONSTITUTION:A resin compsn. consists of 20-70wt.% polyphenylene ether resin (A) (e.g., a copolymer of 2,6-dimethylphenol with 2,3,6-trimethylphenol), 29-79wt.% crystalline polyamide (B) (e.g., nylon 6) and 1-35wt.% non- crystalline to lowly crystalline polyamide (C) having a glass transition temp. of 70-210 deg.C, e.g., one having an amide linkage unit of formula I (wherein W is a 2-12C straight-chain or branched aliph. group), formula II (wherein R is a 1-4C aliph. group) or formula III (wherein Y is a 4-22C aliph. group or an aliph. group having an alicyclic hydrocarbon group). The compsn. has excellent mechanical strengths, gives molded sheet products having excellent falling dart impact strength and oil resistance in particular and has excellent moldability.

Description

DETAILED DESCRIPTION OF THE INVENTION (I) Background of the Invention 1. Technical field to which the present invention pertains The present invention relates to a resin composition that is excellent in mechanical strength, particularly in falling weight impact strength, oil resistance, and molding processability of plate-shaped molded products. relating to things.

In detail, polyphenylene ether resin, crystalline polyamide resin, amorphous or low crystalline polyamide resin,
And if desired, it is made of a compound having both an unsaturated group and a polar group, and is used for injection molding and extrusion, which has excellent mechanical strength balance, moldability, and organic solvent resistance, centering on falling weight impact strength of plate-shaped molded products. The present invention relates to a resin composition suitable for molding and blow molding.

2. Prior art and problems Polyphenylene ether resin has attracted attention as a useful resin with excellent mechanical properties and heat resistance, and is blended with styrene resin, for example, but its solvent resistance is extremely poor, and improvements in this respect have been required. In order to
1663, etc.), polyester (Special Publication No. 51-21
662, etc.) has been proposed. Furthermore, with the aim of improving the impact strength of these blends,
A composition (Japanese Unexamined Patent Application Publication No. 59-49753) has been proposed in which a compound containing a group such as carboxylic acid, imide, or epoxy and a rubber substance are added to a combination of polyphenylene ether and polyamide. On the other hand, as the uses of plastics expand, higher levels of performance than ever before are required of plastic materials, such as heat resistance,
A higher level of impact strength is now required for the above-mentioned blends, which have excellent organic solvent resistance, and in order to meet this demand, the present inventors have proposed a composition (Japanese Patent Application No. 60-265358), which is made by adding a specific range of alkenyl aromatic compound-conjugated diene block copolymers to a combination of compounds having both an unsaturated group and a polar group.

However, in the field of industrial parts, there are cases in which surface impact strength, which is an important performance for large flat plate parts, is only slightly satisfactory, and there is room for improvement in this aspect.

(n) Summary of the Invention The present invention provides a solution to the above-mentioned problems, exhibits a particularly high level of mechanical property balance required in the field of industrial parts, particularly the falling weight impact strength of the flat plate part, and exhibits organic solvent resistance. , which provides a resin composition with good moldability.

For this purpose, as a result of examining various compounding ingredients, we found that in a combination consisting of polyphenylene ether resin, polyamide resin, and optionally a compound having an unsaturated group and a polar group in the same molecule, we found that the main crystalline polyamide resin By replacing some of the components with non-crystalline or low-crystalline polyamide resin components, by using both the crystalline polyamide component and the non-crystalline or low-crystalline polyamide resin component, a very high level of flat plate shape can be achieved. The present invention was completed by discovering that the falling weight impact strength of a molded product can be obtained. Therefore, the gist of the present invention is as follows: (a) Component: polyphenylene ether resin 20-7
0% by weight (B) Component: 29-79% by weight of crystalline polyamide resin (C) Component: 1-55% by weight of amorphous or low-crystalline cyclic hydrocarbon copolyamide with a glass transition temperature of 70-210°C The resin composition consists of:

According to the present invention, a polyphenylene ether-polyamide resin composition has a high level of falling weight impact strength for plate-shaped molded products, has good other mechanical properties, and is suitable as a material for industrial parts having a plate-shaped part. is obtained.

(III) Detailed Description of the Invention 1, Constituent Component (1) Polyphenylene ether resin The polyphenylene ether used in the present invention has a cyclic structural unit represented by the general formula, in which one unit of ether oxygen atom is connected to the benzene nucleus of the next adjacent unit, n is at least 50, and Q is each independently hydrogen, halogen, a hydrocarbon group not containing a tertiary α-carbon atom, a halogen atom and a phenyl nucleus. From the group consisting of halohydrocarbon groups having at least 2 carbon atoms between them, hydrocarbonoxy groups and herohydrocarbonoxy groups having at least 2 carbon atoms between the halogen atom and the phenyl nucleus Indicates selected monovalent substituents, each Q may be the same or different from each other.

Also, a copolymer of 2,6-dimethylphenol and 2,3.6-dimethylphenol, a copolymer of 2,6-dimethylphenol and 2,3,5,6-titramethylphenol, 2,6 -Copolymers such as a copolymer of dinitylphenol and 2,3,6-drimethylphenol may also be mentioned.

Furthermore, the polyphenylene ether used in the present invention is
It also includes polyphenylene ethers modified by grafting styrenic monomers (eg, styrene, p-methylstyrene, α-methylstyrene, etc.) onto the polyphenylene ether defined by the above general formula.

Methods for producing polyphenylene ethers corresponding to the above are known, for example, U.S. Pat.
No. 06875, No. 3257357 and No. 32573
No. 58 specifications and Japanese Patent Publication No. 52-17880
and JP-A-50-51197.

A group of polyphenylene ethers preferred for the purposes of the present invention are those with alkyl substituents in the two positions ortho to the ether oxygen atom and copolymers of 2,6-dialkylphenols and 2,3,6-)realkylphenols. It is.

(2) Crystalline polyamide resin (b) The crystalline polyamide resin used in the present invention H can be thermally melted and exhibits a clear melting point with a measurable heat of fusion. Melting point and heat of fusion can be measured using a differential scanning calorimeter. For example, PERKIN-ELMER DSC-11
There is. Using this device, for example, 10°C per minute.
The heat of fusion can be measured at a heating rate of . The sample is heated to a temperature above the expected melting point, then the sample is cooled at a rate of 10°C per minute, cooled to 30°C, left for about 1 minute, and then heated at a rate of 10°C per minute. It can be measured by The heat of fusion is determined to be a constant value within the experimental error range even when measured in any cycle of temperature increase and decrease after the first. The crystalline polyamide in the present invention refers to the crystalline polyamide obtained by the above method.
It is defined as having a heat of fusion exceeding a1/g. According to this method, the heat of fusion of commercially available nylon-6 is approximately 16
Cal/g.

10, Nylon-6,12 and Nylon-6, T (polyamide made of hexamethylene diamine and terephthalic acid), Nylon-MXD, 6 (polyamide made of metaxylylene diamine and adipic acid), Nylon-6 and Nylon-6 . An example of a commercially available product that can be used is one sold under the trade name Ultramid by West German BASF and others.

(3) Amorphous or low crystalline polyamide resin (C)
The amorphous or low crystalline polyamide resin used in the present invention has a glass transition temperature of 70°C or more and 210°C or less, more preferably 80°C or more and 170°C or less, still more preferably 90°C or more and 170°C or less, particularly preferably is 90℃
The temperature is in the range of 150°C or higher. Amorphous and low crystallinity generally mean that they do not have a clear melting point or measurable heat of fusion; Including those that produce crystals. The glass transition temperature, melting point and heat of fusion can be measured by the method shown in the section of "Crystalline polyamide resin (b)". Furthermore, the amorphous or low-crystalline polyamide resin in the present invention is defined as having a heat of fusion of lCa1/g or less by the above method. It is also possible to know the melting point, glass transition, and temperature from the temperature change behavior of viscoelasticity measured with a mechanical spectrometer or the like. These non-crystalline or low-crystalline hydrocarbon polyamide resins mainly consist of amide bond constituent units selected from the following structural formulas I to ■ having a chain structure or a cyclic structure, It is constructed to satisfy the above glass transition temperature range and amorphous or low crystallinity.

Note that among these non-crystalline or low-crystalline polyamide resins, polyamide resins containing a cyclic structure in the repeating unit of the molecular chain are preferred.

1 -HN-W-NH- (W is at least one type selected from linear or branched aliphatic groups having 2 to 12 carbon atoms) I[-1(N-X-Nli- (X is metaxylylene group or (At least one type of aliphatic group having 5 to 22 carbon atoms and containing at least one alicyclic hydrocarbon skeleton) (Each R is independently hydrogen or an aliphatic group having 1 to 6 carbon atoms) (Each R is a group independently selected from hydrogen or an aliphatic group having 1 to 6 carbon atoms, and each R is a group independently selected from hydrogen or an aliphatic group having 1 to 6 carbon atoms.) R may be the same or different) (Y is at least one type selected from aliphatic groups having 4 to 22 carbon atoms and aliphatic groups including alicyclic hydrocarbon groups) Vl -C- Z-Nl+- (Z is at least one selected from aliphatic groups and aromatic groups having 4 to 14 carbon atoms) Specific examples of W in structural unit I include butylene group,
Hexylene group, octylene group, decanylene group, 2,2.
Examples include 4-1-limethylhexylene group, 2.4.4-trimethylhexylene group, 3-methylhexylene group, pentylene group, and more preferably butylene group, hexylene group, 2.4.4- ) Limethylhexylene group, 2.4
．． 4-) Limethylhexylene group.

Specific examples of Dicyclohexane-1,1'-
Diyl group (Xc), 1.5.5-trimethyl-1,
3-cyclohexylene-1-methylene group (Xd),
Cyclohexylene-1,4-dimethylene group (Xe), 4
-Thimelenecyclohexylene group (Xf), 3-methylenecyclohexylene group (Xg), cyclohexylene-1,
3-dimethylene group (Xh'), and the like. each X
The structural formula of a specific example is shown below.

(X a) (X b) (Xc)
(Xd)C)13 C11□
= (Xe) (Xf) (X g)
(Xh) Specific examples of R in the structural units It is an atom.

Specific examples of Y in the structural unit ■ include ethylene group,
Propylene group, butylene group, hexylene group, octylene group, decanylene group, 1,4-cyclohexylene group, 1,
3-cyclohexylene group, Wl in structural unit H (
Xa), (Xb), (Xc), (Xd).

(Xe), (Xf), (Xg), (Xh)
etc., more preferably an ethylene group, a propylene group, a butylene group, an octylene group, a 1,4-cyclohexylene group, a 1,3-cyclohexylene group, and more preferably an ethylene group, a propylene group, a butylene group. be.

Specific examples of Z in the structural unit ■ include butylene group,
Examples include pentylene group, hexylene group, decadienoic acid, undecanylene group, paraphenylene group, etc., with pentylene group, hexylene group, and undecanylene group being more preferred, and pentylene group being even more preferred.

In addition, in the above-mentioned structural units I to (2), those mainly containing I, I[I and (2) are more preferable.

The relative viscosity of the polyamide resin (C) (in 98% concentrated sulfuric acid, concentration 1 g/dl, measurement temperature 25°C) is 1.0 to 5.
0 dl/g, more preferably 1.4-3.5 dl/g.

More preferably, it is in the range of 1.6 to 3.0 a/g.

The manufacturing method of these non-crystalline or low crystalline polyamide resins is known, for example, JP-A-58-38751, JP-A-60-217237, JP-A-60-2.
Those shown in Japanese Patent No. 19227 and the like are applicable.

In the present invention, if the hue of the resin composition is not a problem, a compound (d) having both an unsaturated group and a polar group in the same molecule can be blended into the composition, if desired.

A compound that has both an unsaturated group and a polar group as a compound Tel is a compound that has an unsaturated group, that is, a carbon-carbon double bond or a carbon-carbon triple bond, and a polar group, that is, a functional group that exhibits chemical reactivity in the same molecule. It is a compound. Such functional groups include carboxylic acid groups, groups derived from carboxylic acids, that is, various salts and esters substituted with hydrogen atoms or hydroxyl groups of carboxyl groups, acid amides, acid anhydrides,
imide, acid azide, acid halide, or functional groups such as oxazoline and nitrile, epoxy group, amino group,
Examples include a hydroxyl group or an isocyanate ester group. As compounds having both an unsaturated group and a polar group, unsaturated carboxylic acids, unsaturated carboxylic acid derivatives, unsaturated epoxy compounds, unsaturated alcohols, unsaturated amines, and unsaturated isocyanate esters are mainly used.

Specifically, maleic anhydride, maleic acid, fumaric acid, maleimide, maleic acid hydrazide, a reaction product of maleic anhydride and diamine, such as O (where R represents an aliphatic or aromatic group), etc. Methylnadic anhydride, dichloromaleic anhydride, maleic acid amide, itaconic acid, itaconic anhydride, soybean oil, tung oil, castor oil, linseed oil, hempseed oil, cottonseed oil, sesame oil, rapeseed oil, peanut oil , natural oils and fats such as camellia oil, olive oil, coconut oil, and sardine oil, epoxidized natural oils and fats such as epoxidized soybean oil, acrylic acid, butenoic acid, crotonic acid, vinyl acetic acid, methacrylic acid, pentenoic acid, angelic acid, tigrin acid, 2-pentenoic acid,
3-pentenoic acid, α-ethyl acrylic acid, β-methylcrotonic acid, 4-pentenoic acid, 2-hexenoic acid, 2-methyl-2-pentenoic acid, 3-methyl-2-pentenoic acid, α
-Ethylcrotonic acid, 2,2-dimethyl-3-butenoic acid, 2-heptenoic acid, 2-octenoic acid, 4-decenoic acid, 9
-undecenoic acid, 10-undecenoic acid, 4-dodecenoic acid, 5-dodecenoic acid, 4-tetradecenoic acid, 9-tetradecenoic acid, 9-hexadenoic acid, 2-octadecenoic acid, 9
-Octadenoic acid, icosenoic acid, tocosenoic acid, erucic acid, tetracosenoic acid, mycolipen M, 2.4-pentadienoic acid, 2.4-hexadienoic acid, diallylacetic acid, geranic acid, 2,4-decadienoic acid, 2,4 -Dodecadienoic acid, 9.12-hexadecadienoic acid, 9.12-octadecadienoic acid, hexadecatrienoic acid, linoleic acid, lylunic acid, octadecatrienoic acid, icosadienoic acid, icosatrienoic acid, icosatetraenoic acid , ricinoleic acid, eleostearic acid, oleic acid, icosapene citric acid, erucic acid, docosadienoic acid, docosatrienoic acid, docosatetraenoic acid, docosapene citric acid, tetracosenoic acid, hexylene group, hexacosenoic acid, oftacosenoic acid, traacontene Unsaturated carboxylic acids such as acids, esters, acid amides, anhydrides of these unsaturated carboxylic acids, allyl alcohol, crotyl alcohol, methylvinylcarbinol, allylcarbinol, methylpropenylcarbinol, 4-pentene-1
-ol, 10-undecen-1-ol, propargyl alcohol, 1,4-pentadien-3-ol, 1
．． 4-hexadien-3-ol, 3.5-hexadien-2-ol, 2.4-hexadien-1-ol,
General formula 〇-11g-5OH, C-Hz-1OH.

C, H□, -WOO (where n is a positive integer) alcohol, 3-butene-1,2-diol, 2.5-
Dimethyl-3-hexene-2,5-diol, 1,5-
Unsaturated alcohols such as hexadiene-3,4-diol and 2,6-octanonine-4,5-diol, or unsaturated amines in which the 011 group of such unsaturated alcohols is replaced with an NHz group, or Low polymerization of butadiene, isoprene, etc. (for example, average molecular weight of 500 to 1
0,000) or polymers (for example, those with an average molecular weight of 10,000 or more) to which maleic anhydride or phenols are added, or amino groups,
Examples include those into which a carboxylic acid group, hydroxyl group, epoxy group, etc. have been introduced, and allyl isocyanate.

In the present invention, the definition of a compound having both an unsaturated group and a polar group in the same molecule includes two or more unsaturated groups and two or more polar groups.
Needless to say, compounds containing more than one specific compound (same or different) are also included, and it is also possible to use two or more specific compounds. Among these, more preferred are unsaturated dicarboxylic acids and their anhydrides such as maleic anhydride, maleic acid, itaconic anhydride, and itaconic acid, unsaturated alcohols such as oleyl alcohol, and epoxidized natural oils and fats such as epoxidized soybean oil. More preferred are maleic anhydride, maleic acid, oleyl alcohol, epoxidized soybean oil, and epoxidized linseed oil, and particularly preferred is maleic anhydride.

In the present invention, when the compound (d) having both an unsaturated group and a polar group is blended in the same molecule, a resin composition with further improved impact strength can be obtained, but on the other hand, the color tone of the molded product may be Since this tends to cause problems, component (d) can also be used if color tone is not a problem. In addition, when such (dl component) is used together with the constituent components of the present invention, it is possible to further improve the impact strength.

2. The composition ratio of components (a) to (C) as above is (a)
+ Component (a): 20 to 70% by weight, preferably 30 to 60% in the total weight of (b) + (C)
weight%, preferably 40 to 60% by weight.

Component (b): 29-79% by weight, preferably 34-69%
% by weight, particularly preferably 39-59% by weight.

Component (C): 1 to 55% by weight, preferably 2 to 39% by weight, preferably 2 to 32% by weight of FK, and (
The amount of component C) is preferably 70% by weight or less, particularly preferably 60% by weight or less, based on the total amount of component (bl + (C)).

In addition, when blending the compound of the above (d) component with the above (a), (b) and (C) components, (31, (b)
The total amount of components ) and (C) is 100 parts by weight, and the amount of component (d) added as an extra number is preferably 0.01 to 10 parts by weight, preferably 0.05 to 5 parts by weight, The amount is particularly preferably 0.1 to 2 parts by weight, more preferably 0.2 to 1.5 parts by weight, and even more preferably 0.2 to 1 part by weight.

Regarding the above composition, if component (a) is less than 20% by weight, the heat resistance rigidity will be insufficient, and if it exceeds 70% by weight, the organic solvent resistance will be unsatisfactory, which is not preferred.

(b) If the component strength exceeds 79% by weight, the heat resistance stiffness is unsatisfactory, which is undesirable.

Effects of the present invention, that is, for the purpose of obtaining a resin composition having a high level of falling weight impact strength for plate-shaped molded products, (
It is sufficient that the blending amount of component C) is 1% by weight or more and 55% by weight or less, and 70% by weight or less for the total weight of components (b) and (c). If component (C) is less than 1% by weight, the impact strength level will be unsatisfactory, which is not preferable. In addition, if the ratio of component (C) to the total amount of component (C) exceeds 70% by weight, the level of falling weight impact strength of the plate-shaped molded product tends to be insufficient.

In this case, problems tend to occur in the impact strength level and the appearance of the molded product.

The composition according to the present invention may optionally include a thermoplastic or thermosetting resin other than the above-mentioned polymer components, a rubber component, an antioxidant, a weather resistance improver, and a nucleating agent, as long as the object of the present invention is not impaired. Components such as a slitting agent, an inorganic or organic filler or reinforcing agent, a flame retardant, various colorants, an antistatic agent, a mold release agent, etc. can also be added.

For example, such polymer components ((a), (b),
As an example other than component (C), random (in particular,
Styrene-butadiene rubber), graft, block (
In particular, copolymers with a bonding mode such as styrene-butadiene block copolymers (such as styrene-butadiene block copolymers) which include a partially crosslinked structure, or where some of the aliphatic unsaturated bonds derived from a conjugated diene are hydrogen These include things that are added.

If a composition with even higher Izod impact strength is required, such a copolymer can be added, but on the other hand, the color tends to change when used in a high temperature environment.

Examples of antioxidants include highly sterically hindered phenol-based, thioether-based, phosphorus-based, and amine-based stabilizers.

Note that the addition of glass fiber, wollastonite, calcium carbonate, barium sulfate, titanium oxide, and zinc oxide has a remarkable effect on improving heat resistance.

3. Blending method The composition of the present invention can be produced using a conventional mixing machine such as a screw extruder, twin screw extruder, Banbury mixer, roll, Brabender plastograph, or kneader.
Usually, it is kneaded in an extruder or the like to form a pellet-like compound and then subjected to processing, but in special cases, all the ingredients can be directly fed to various molding machines and molded while being kneaded by the molding machine. In addition, fillers and other ingredients (along with various additives as necessary) are kneaded to a high concentration in advance to form a masterbatch, which is then separately diluted with other polymers, blended, compounded, and molded. You can also.

Furthermore, during kneading, an additional filler component may be kneaded with the crystalline polyamide resin in advance.

4. Application of the resin composition of the present invention The molding method using the composition of the present invention is not particularly limited, and may include molding methods generally applied to thermoplastic resins, such as extrusion molding, blow molding, injection molding, and sheet molding. It can be easily molded by molding methods such as thermoforming, rotational molding, and lamination molding, among which injection molding is most suitable. Due to its good mechanical properties and dimensional stability, it is suitable for use in parts such as interior and exterior parts of automobiles, exterior parts of electrical equipment, and so-called office automation equipment.

(IV) Experimental Example 1, Measurement and Evaluation Method The physical property values and properties in the Examples and Comparative Examples shown below were measured and evaluated under the following conditions.

1) Flexural modulus ISOR178-1974 Procedure 12
It was measured using an Instron testing machine according to (JIS R7203).

2) Izot impact strength ISOR1801969 (JIS R7110) (/
It was measured using an Izot impact tester manufactured by Toyo Seiki Seisakusho in accordance with the Izot impact strength tester (Izot impact strength with 7 marks).

3) Test piece (120m) installed on a falling weight impact strength support stand (hole diameter 4011)
A dart, which is a load sensor, was dropped (2 m XT kgf) onto a specimen (X3 QIIm, thickness 21 m), the deformation and fracture behavior of the test piece under impact load was measured, and the impact energy absorbed up to the crack initiation point in the obtained impact pattern was calculated. , the impact strength of the material. The measurement atmosphere temperature is 23°C and -30'C.

4) Organic solvent resistant injection molded specimen (129n+X125 Tsuru, thickness 4 Dragon),
After being immersed in commercially available gasoline at room temperature for 7 days, changes in appearance were observed. The case where there was no change in appearance was rated ◯, the case where surface roughness or whitening occurred was rated Δ, and the case where surface roughness or whitening was significant was rated ×.

2. Mixing and mixing of the resin composition After thoroughly mixing and stirring the prescribed amounts of each component shown in Table 1 in a super mixer, melt-knead at a set temperature of 280°C using a PCM twin-screw extruder manufactured by Ikegai Iron Works. After forming a composition, it was extruded into strands and made into pellets using a cutter.

3. Creation of test pieces for physical property measurement and evaluation In-line screw set injection molding machine, IS-908 manufactured by Toshiba Machinery Works
Using a mold, the cylinder temperature is 280℃ and the mold cooling temperature is 60℃.
Test pieces were prepared by injection molding at ℃. In addition, during injection molding, a vacuum dryer is used until immediately before injection molding.
1 mg Drying was performed at 80° C. for 48 hours.

Immediately after molding, the injection molded specimens were placed in a desiccator and left at 23° C. for 4 to 6 days, after which physical properties were measured.

4. Details of each component 1) Polyphenylene ether resin (a) Intrinsic viscosity 0.5
24/g of poly(2,6-dimethyl-1,4-phenylene) ether (in chloroform at 30° C.) was used.

2) In crystalline polyamide resin) Nylon-6,6 (trade name: Ultramid-A4) and nylon-6 (trade name: Ultramid-B4) manufactured by Bardische Anirin und Soder Akchen Gesellschaft (West Germany) were used.

3) Amorphous or low-crystalline polyamide resin (C) As a cyclic hydrocarbon-based amorphous or low-crystalline polyamide resin, Novamifud X21 manufactured by Mitsubishi Chemical Corporation (glass transition temperature 125°C, JIS K6810 compliant) A relative viscosity of 2.1 dl/g) was used.

4) Compounds that have both an unsaturated group and a polar group in the same molecule (
e) Commercially available maleic anhydride (reagent grade) was used.

In addition, when kneading each component, Irganox 1010 (manufactured by Ciba Geigy) was used as a stabilizer in (a) to (d).
0.3 part by weight was added as an extra number to the total weight part of filoO of all polymer components.

Hereinafter, the effects of the present invention will be specifically illustrated by Examples and Comparative Examples, but these examples are merely illustrative, and the scope of the present invention is not limited by these examples.

5. Explanation of Examples and Comparative Examples Comparison of Example 1 with Comparative Example 1 and Comparative Example 2 in Table 1, Comparison of Examples 3 to 4 with Comparative Example 1 and Comparative Example 5 in Table 2 Therefore, in a resin composition consisting of a combination of polyphenylene ether and polyamide, a resin composition consisting of a combination of crystalline polyamide and amorphous polyamide as the polyamide component uses only crystalline polyamide or amorphous polyamide as the polyamide component. The effect of the present invention is clear as the falling weight impact strength of the plate-shaped molded product is significantly higher than that of each of the resin compositions used. Furthermore, even when both polyamides are used in combination, the level of Izot impact strength is significantly higher. There will be no decline.

Furthermore, from the comparison between Example 2 and Comparative Example 3 and Comparative Example 4 in Table 1, and the comparison between Example 5 and Comparative Example 3 and Comparative Example 6 in Table 2, polyphenylene ether, polyamide, and the same molecule As an example of a compound having both an unsaturated group and a polar group in the resin composition, maleic anhydride is added, but a resin composition made by combining crystalline polyamide and non-crystalline polyamide as the polyamide component has a decrease in tonal power. (not shown), the falling weight impact strength of plate-shaped molded products is significantly higher than that of resin compositions that use crystalline polyamide or amorphous P:polyamide alone as the polyamide component, and this book The effect of evening light is obvious. Furthermore, no significant difference was observed in the eye shift impact strength.

Claims (1)

[Scope of Claims] (a) A resin composition comprising the following components (a) to (c). (a) Component: 20-70% by weight of polyphenylene ether resin (b) Component: 29-79% by weight of crystalline polyamide resin (c) Component: Amorphous or low-crystalline polyamide with a glass transition temperature of 70-210°C Resin 1-55% by weight