JPH093317A - Polyphenylene sulfide resin composition - Google Patents

Abstract

PURPOSE: To obtain a thermoplastic resin composition which contains polyphenylene sulfide and polyphenylene ether, is significantly improved in compatibility between the two polymers, and gives a molded article excellent in rigidity, impact strength, and appearance by incorporating a specific phenolic compound and an alkali metal salt into a blend of polyphenylene sulfide and polyphnylene ether. CONSTITUTION: This composition comprises 10-90 pts.wt. polyphenylene sulfide (a), 90-10 pts.wt. polyphenylene ether (b), 0.01-10 pts.wt. phenolic compound (c) represented by the formula (wherein R<1> R<2> , R<3> , and R<4> may be the same or different and each is hydrogen or a l-18C hydrocarbon group, Z is a hydrocarbon residue having a valence of 1-4, and n is an integer of 1 to 4), and 0.01-10 pts.wt. alkali metal salt (d), provided that the sum of the components (a) and (b) is 100 pts.wt.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to engineering plastics industrial materials having excellent mechanical properties and appearance of molded articles, such as thermoplastics useful for providing connectors, ignition manifolds, gears, bumpers, coil encapsulants and the like. It relates to a resin composition.

[0002]

2. Description of the Related Art Polyphenylene sulfide is a heat-resistant crystalline resin having a high melting point, which is excellent in fluidity, resistance to organic solvents, electrical characteristics, flame retardancy and the like. However, when it is used as a molding material for a sliding member, an optical disk carriage, etc., it has a drawback that the polymerization degree is low and the extrusion molding stability and the injection molding stability are poor. Further, since the glass transition temperature is not so high as about 90 ° C., the rigidity of the molded product is greatly reduced when it is used at high temperature.
Therefore, the rigidity is improved by compounding with an inorganic filler such as glass fiber, carbon fiber, talc, silica (USP 4,737,539, USP 4,009,04).
However, in this case, there are problems that the appearance of the molded product is deteriorated and warpage is likely to occur in the molded product.

On the other hand, polyphenylene ether is an engineering plastic having excellent heat resistance, dimensional stability, non-hygroscopicity, electrical characteristics, etc., but its melt flowability is poor, molding processing is difficult, and oil resistance, It has the drawback of poor impact resistance. Therefore, various compositions have been proposed for the purpose of providing a molding material that complements the drawbacks without impairing the advantages of both.

For example, a technique for improving the molding processability of polyphenylene ether by blending polyphenylene ether with polyphenylene sulfide has been disclosed (Japanese Patent Publication No. 56-34032). Although this product has improved molding processability, it is inherently incompatible with polyphenylene ether and polyphenylene sulfide, and such a simple blend system has poor compatibility at the interface due to poor affinity at the interface. Therefore, phase separation occurs during molding. Therefore, the resulting molded article has insufficient impact resistance and cannot be said to have an excellent balance of mechanical properties.

Therefore, as a technique capable of improving the compatibility of both, Japanese Patent Laid-Open No. 36261/1990 discloses that polyphenylene sulfide and polyphenylene ether have a double or triple carbon-carbon bond and a carboxylic acid or an acid in the molecular structure. It has been disclosed to add a compound containing an anhydride, acid amide, imide, carboxylic acid ester, amino, epoxy or hydroxyl group, such as maleic anhydride, to improve the compatibility of both resins. However, even by this method, the compatibility of the polyphenylene ether and the polyphenylene sulfide cannot be said to be sufficiently improved, and the effect of improving the impact resistance is small.

[0006]

DISCLOSURE OF THE INVENTION The present invention relates to a thermoplastic resin composition which gives a molded product having excellent compatibility between polyphenylene sulfide and polyphenylene ether, a molded product having a good balance of appearance, mechanical properties and solvent resistance. The purpose is to provide things.

[0007]

Means for Solving the Problems As a result of intensive studies, the present inventors have found that the compatibility of both resins is remarkably improved by adding a specific phenol compound and an alkali metal salt to polyphenylene sulfide and polyphenylene ether. The present invention was completed by finding that an improved resin composition having excellent mechanical strength can be obtained. That is, the present invention is a polyphenylene sulfide-based resin composition containing the following components (a), (b), (c) and (d). (a) Polyphenylene sulfide 10 to 90 parts by weight (b) Polyphenylene ether 90 to 10 parts by weight (c) Phenolic compound represented by the general formula (I)

[0008]

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(In the formula, R ¹ , R ² , R ³ and R ⁴ represent a hydrogen atom or a hydrocarbon group having 1 to 18 carbon atoms and may be the same or different from each other. Z is 1 Represents a monovalent to tetravalent hydrocarbon residue, and n represents an integer of 1 to 4.)
0.01 to 10 parts by weight based on 100 parts by weight of total of (a) and (b) (d) 0.01 to 10 parts by weight of alkali metal salt based on 100 parts by weight of total of components (a) and (b). Parts by Weight The present invention will be described in detail below. Component (a) Polyphenylene Sulfide The polyphenylene sulfide used in the present invention has the general formula (I
I)

[0010]

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A crystalline resin containing a repeating unit represented by the following as a main constituent element. In the present invention, the above general formula
It is preferable that the repeating unit represented by (II), or the main component containing the repeating unit is 80 mol% or more, more preferably 90 mol% or more, from the viewpoint of physical properties such as heat resistance. When substantially all of the constituent components of the polyphenylene sulfide are not composed of the component composed of the repeating unit represented by the general formula (II), the remaining (20 mol%
The following) are copolymerizable, for example, the following general formulas (II) to (IX)
Can be satisfied with a component consisting of a repeating unit represented by

[0012]

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(In the formula, Y is an alkyl group, a phenyl group, or an alkoxy group.) The polyphenylene sulfide preferably has a substantially linear structure from the viewpoint of the physical properties of the molded product. As long as the physical properties are not substantially reduced, for example, a polymerized crosslinked product obtained by using an effective amount of a crosslinking agent (for example, trihalobenzene) at the time of polymerization, or polyphenylene sulfide was subjected to heat treatment in the presence of oxygen or the like to be crosslinked. A thermally crosslinked product can also be used.

The polyphenylene sulfide has a melt viscosity at 300 ° C. of 100 to 100,000 poises, preferably 500 to 50,000 poises, more preferably
It is preferably in the range of 500 to 20,000 poise.
If the melt viscosity is less than 100 poise, the fluidity is too high and molding becomes difficult. Even if the melt viscosity exceeds 100,000 poise, the fluidity is too low, and molding becomes difficult.

The polyphenylene sulfide is, for example, a method for producing a polymer having a relatively small molecular weight as disclosed in Japanese Patent Publication No. 45-3368, and a linear relatively high polymer as disclosed in Japanese Patent Publication No. 52-12240. It can be produced according to a method for producing a polymer having a molecular weight or a method for heating a low molecular weight polymer in the presence of oxygen to obtain a crosslinked product, or by making necessary modifications thereto. Component (b) Polyphenylene ether The polyphenylene ether used in the present invention has the general formula (X)

[0016]

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(Wherein Q ¹ represents a halogen atom, a primary or secondary alkyl group, an aryl group, an aminoalkyl group, a halohydrocarbon group, a hydrocarbonoxy group or a halohydrocarbonoxy group, and Q 1 ² represents a hydrogen atom, a halogen atom, a primary or secondary alkyl group, a halohydrocarbon group or a halohydrocarbonoxy group, respectively), and is a homopolymer or copolymer containing a repeating unit represented by is there.

Preferred examples of the primary alkyl group for Q ¹ and Q ² include methyl, ethyl, n-propyl, n-butyl, n.
-Amyl, isoamyl, 2-methylbutyl, 2,3-dimethylbutyl, 2-, 3- or 4-methylpentyl or heptyl. Examples of secondary alkyl groups are isopropyl, sec-butyl or 1-ethylpropyl.
In many cases Q ¹ is an alkyl or phenyl group, especially
It is an alkyl group having 1 to 4 carbon atoms, and Q ² is a hydrogen atom.

Specifically, poly (2,6-dimethyl-
1,4-phenylene ether), poly (2,6-diethyl-1,4-phenylene ether), poly (2,6-dipropyl-1,4-phenylene ether), poly (2-
Methyl-6-ethyl-1,4-phenylene ether),
Poly (2-methyl-6-propyl-1,4-phenylene ether), poly (2-ethyl-6-propyl-1,4)
-Phenylene ether), 2,6-dimethylphenol / 2,3,6-trimethylphenol copolymer, 2,6
-Dimethylphenol / 2,3,6-triethylphenol copolymer, 2,6-diethylphenol / 2,3,
Grafting of 6-trimethylphenol copolymer, 2,6-dipropylphenol / 2,3,6-trimethylphenol copolymer, poly (2,6-dimethyl-1,4-phenylene ether) with styrene Examples thereof include a copolymer and a graft copolymer obtained by graft-polymerizing styrene to a 2,6-dimethylphenol / 2,3,6-trimethylphenol copolymer.

Suitable polyphenylene ether homopolymers include, for example, poly (2,6-dimethyl-1,4).
-Phenylene ether). A preferable copolymer is a random copolymer of 2,6-dimethyl-1,4-phenylene ether and 2,3,6-trimethyl-1,4-phenylene ether. The polyphenylene ether used in the present invention preferably has an intrinsic viscosity of 0.2 to 0.8 dl / g usually measured at 30 ° C. in chloroform.

Polyphenylene ether is usually produced by oxidative coupling of the above-mentioned monomers. Numerous catalyst systems are known for the oxidative coupling polymerization of polyphenylene ethers. There is no particular limitation on the selection of the catalyst, and any known catalyst can be used. For example, those containing at least one heavy metal compound such as copper, manganese, and cobalt, usually in combination with various other substances, and the like. Component (c) Phenol Compound The phenol compound used in the present invention has the general formula (I)

[0022]

[Chemical 6]

(In the formula, R ¹ , R ² , R ³ and R ⁴ represent a hydrogen atom or a hydrocarbon group having 1 to 18 carbon atoms and may be the same or different. Z is 1 Represents a monovalent to tetravalent hydrocarbon residue, and n represents an integer of 1 to 4). Specific examples thereof include n-octadecyl-3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate and 1,6-hexanediol-bis {3- (3,5-di-tert- Butyl-4
-Hydroxyphenyl) propionate}, triethylene glycol-bis {3- (3-tert-butyl-4)
-Hydroxy-5-methylphenyl) propionate}, 2,2-thiodiethylene-bis {3- (3,5-
Di-tert-butyl-4-hydroxyphenyl) propionate}, 1,3,5-tris-2- {3- (3,3
5-di-tert-butyl-4-hydroxyphenyl)
Propionyloxy} ethyl isocyanurate, tetrakis {methylene-3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate} methane,
3,9-bis [2- {3- (3-tert-butyl-4
A typical example is -hydroxy-5-methylphenyl) propionyloxy} -1,1-dimethylethyl] -2,4,8,10-tetraoxaspiro [5,5] undecane. Particularly preferably, n-octadecyl-3-
(3,5-di-tert-butyl-4-hydroxyphenyl) propionate, tetrakis {methylene-3-
(3,5-Di-tert-butyl-4-hydroxyphenyl) propionate} methane, 3,9-bis [2-
{3- (3-tert-butyl-4-hydroxy-5-
Methylphenyl) propionyloxy} -2,4,8,
Examples include 10-tetraoxaspiro [5,5] undecane.

Component (d) Alkali metal salt The alkali metal salt used in the present invention is an alkali metal (Li,
It is a compound consisting of a cation of an element selected from Na, K, Rb, Cs and Fr) and a conjugate base of a monobasic acid. The alkali metal is preferably Li, Na, K, Cs, and more preferably N.
a, K, Cs. As the conjugate base of monobasic acid, hydroxide ion, carbonate ion, acetate ion and alkoxyl ion are preferred. Specific examples of the alkali metal salt include alkali metal hydroxides such as sodium hydroxide and potassium hydroxide, alkali metal carbonates such as sodium carbonate, potassium carbonate, and cesium carbonate, sodium methoxide, sodium ethoxide, and the like. Examples thereof include alkali metal alcoholates such as sodium-n-butoxide and potassium-tert-butoxide, and basic compounds such as alkali metal acetates such as sodium acetate, potassium acetate and cesium acetate. Among these, specifically, sodium methoxide,
Sodium ethoxide, sodium hydroxide, potassium carbonate and cesium acetate are preferred. These alkali metal salts may be added alone or in combination of two or more.

Additional components In the resin composition according to the present invention, the above-mentioned components (a), (b),
In addition to (c) and (d), if necessary, other additional components may be added to the extent that the properties of the resin composition of the present invention are not impaired.

As the additional component used in the present invention, for example, an impact resistance improver, a filler, a flame retardant, a crystallization accelerator (nucleating agent), a silane coupling agent, an antioxidant, a heat stabilizer, an ultraviolet absorber. Agents, hindered amine light stabilizers, colorants, catalysts, cross-linking accelerators, cross-linking inhibitors and catalysts for accelerating the reaction of each component. The amount of the additional component added is, for example, 5 to 40 parts by weight of a thermoplastic elastomer as an impact modifier and 5 to 40 parts by weight of a filler with respect to 100 parts by weight of each of the components (a) and (b). Parts by weight, 2 to 20 parts by weight of flame retardant, crystallization accelerator (nucleating agent), silane coupling agent such as mercaptosilane, vinylsilane, aminosilane, and epoxysilane, antioxidant, heat stabilizer, ultraviolet absorber, 0.1 to 5 parts by weight of a hindered amine light stabilizer and a colorant, a metal salt of thiophosphinic acid as a crosslinking accelerator for the purpose of controlling the degree of crosslinking of polyphenylene sulfide, and a dialkyltin dicarboxylate and aminotriazole as a crosslinking inhibitor. Can be added in the range of 0.1 to 5 parts by weight. A catalyst for promoting the reaction of each component may be added in an amount of less than 10 parts by weight, more preferably less than 5 parts by weight. When the amount of the catalyst that accelerates the reaction is 10 parts by weight or more, a gas is generated during molding, which may deteriorate the appearance of the molded product and may deteriorate the physical properties, which is not preferable.

The filler used in the present invention includes metal oxides (silicon oxide, titanium oxide, zinc oxide, iron oxide, magnesium oxide, alumina, etc.), silicates (kaolin, clay, mica, pentonite, silica, Talc, wollastonite, montmorillonite, etc.), iron hydroxide, hydrotalcite, calcium carbonate, magnesium carbonate, barium sulfate, calcium sulfate, boron nitride, silicon carbide,
Glass beads, glass fibers, alumina fibers, silica-alumina fibers, zirconia fibers, silicon nitride fibers, boron nitride fibers, asbestos fibers, silicon carbide fibers, calcium silicate fibers, gypsum fibers, polyamide fibers, phenol fibers, silicon carbide whiskers, Potassium titanate whiskers and carbon fibers can be used.

As the catalyst for promoting the reaction of each component used in the present invention, tri-n-butylamine, triethylamine, triphenylamine, benzyldimethylamine, tris (dimethylamino) methylphenol, 4- (N,
Tertiary amines such as N-dimethyl) pyridine, quaternary ammonium salts such as triethylbenzylammonium chloride, tetramethylammonium chloride and trioctylmethylammonium chloride, quaternary phosphonium salts such as tetrabutylphosphonium bromide and tetraphenylphosphonium bromide, 2 -Ethyl-4-methylimidazole, 2-methylimidazole, 1-cyanoethyl-2-methylimidazole and other imidazole compounds,
Metal acetate salts such as zinc acetate and cobalt acetate, transesterification accelerators such as antimony trioxide and tetraoctyl titanate, and basic compounds such as pyridine can be added.

Examples of the thermoplastic elastomer used as an impact resistance improver added to the polyphenylene sulfide resin composition of the present invention include polyolefin elastomers, diene elastomers, polystyrene elastomers, polyamide elastomers, polyester elastomers, polyurethanes. Known elastomers such as type elastomers, fluorine type elastomers, and silicone type elastomers can be used, but polyolefin type elastomers, diene type elastomers, or polystyrene type elastomers are preferable. As the thermoplastic elastomer to be added to the resin composition of the present invention, JIS K720
The three-point bending elastic modulus measured according to 3 is 1000 kg /
A polymer having a glass transition temperature of −10 ° C. or less at a cm ² or less is preferable, and the impact resistance of the resin composition is improved by adding the thermoplastic elastomer to the polyphenylene sulfide resin composition of the present invention.

Examples of the polyolefin elastomer used in the present invention include polyisobutylene and ethylene-
Propylene copolymer, ethylene-propylene-non-conjugated diene copolymer, ethylene-butene-1 copolymer, ethylene-propylene-butene-1 copolymer, ethylene-hexene-1 copolymer, ethylene-vinyl acetate copolymer Polymer, ethylene-acrylic acid, ethylene-methacrylic acid copolymer, ethylene-glycidyl acrylate copolymer, ethylene-glycidyl methacrylate copolymer, ethylene-
Examples thereof include vinyl acetate-glycidyl methacrylate copolymer, ethylene-maleic acid copolymer, ethylene-maleic anhydride copolymer and the like.

Examples of the diene elastomer used in the present invention include polybutadiene and its hydride, polyisoprene and its hydride, butadiene-styrene random copolymer and its hydride, and the like. Examples of the polystyrene-based elastomer used in the present invention include a block copolymer of a vinyl aromatic compound and a conjugated diene compound or a hydrogenated product of this block copolymer (hereinafter abbreviated as hydrogenated block copolymer), Specifically, a block copolymer comprising at least one vinyl aromatic compound-based polymer block and at least one conjugated diene compound-based polymer block, and this block copolymer are hydrogenated. It is a hydrogenated block copolymer obtained by adding and hydrogenating at least 80% of the aliphatic double bonds based on the conjugated diene compound in this block copolymer.

Examples of the vinyl aromatic compound constituting the block copolymer which is the polystyrene elastomer used in the present invention include styrene, α-methylstyrene,
Vinyltoluene, p-tert-butylstyrene, 1,
One or more kinds can be selected from 1-diphenylethylene and the like, and styrene is preferable among them. Examples of the conjugated diene compound include butadiene, isoprene,
One or two or more kinds are selected from 1,3-pentadiene, 2,3-dimethyl-1,3-butadiene and the like, and among them, butadiene, isoprene and a combination thereof are preferable. In the polymer block mainly composed of the conjugated diene compound, the microstructure in the block can be arbitrarily selected. For example, in the polybutadiene block, the 1,2-vinyl bond structure is 5 to 65%, preferably 10 to 10. 50%. The molecular structure of the block copolymer may be linear, branched, radial, or any combination thereof.

As a method for producing these block copolymers, for example, a vinyl aromatic compound-conjugated diene compound block copolymer is used in an inert solvent using a lithium catalyst by the method described in JP-B-40-23798. Polymers can be synthesized. The hydrogenated block copolymer, which is the polystyrene elastomer used in the present invention, is obtained by hydrogenating the above vinyl aromatic compound-conjugated diene compound block copolymer. As a method for producing the block copolymer, for example, the method described in JP-B-42-8704 and JP-B-43-6636 can be used. In particular, the heat resistance of the hydrogenated block copolymer obtained,
Hydrogenated block copolymers synthesized using a titanium-based hydrogenation catalyst exhibiting excellent heat deterioration resistance are most preferable. For example, JP-A-59-133203 and JP-A-60-79005. The block copolymer having the above structure can be hydrogenated in the presence of a titanium-based hydrogenation catalyst in an inert solvent by the method described in 1. At that time, at least 80% of the aliphatic double bond based on the conjugated diene compound of the vinyl aromatic compound-conjugated diene compound block copolymer was hydrogenated, and the polymer block mainly composed of the conjugated diene compound was morphologically modified with olefin. It is necessary to convert it into a polymerizable compound polymer.

The amount of non-hydrogenated aliphatic double bonds contained in this hydrogenated block copolymer can be easily determined by a Fourier transform infrared spectrophotometer, nuclear magnetic resonance apparatus or the like. Further, the thermoplastic elastomer used in the present invention is one of α, β-unsaturated carboxylic acid and its derivative or acrylamide and its derivative with respect to 100 parts by weight of the polyolefin elastomer, diene elastomer or styrene elastomer. Alternatively, modified products (modified polyolefin-based elastomer, modified diene-based elastomer or modified styrene-based elastomer) obtained by reacting two or more of 0.01 to 10 parts by weight in the presence or absence of a radical initiator may be mentioned. it can. Specific examples of the α, β-unsaturated carboxylic acid and its derivative include maleic acid, maleic anhydride, fumaric acid,
Itaconic acid, acrylic acid, glycidyl acrylate, 2
-Hydroxyethyl acrylate, methacrylic acid, glycidyl methacrylate, 2-hydroxyethyl methacrylate, crotonic acid, cis-4-cyclohexene-1,
2-dicarboxylic acid and its anhydride, endo-cis-
Bicyclo [2.2.1] -5-heptene-2,3-dicarboxylic acid, its anhydride, a maleinimide compound, etc. are mentioned. Specific examples of acrylamide and its derivatives include acrylamide, methacrylamide, N- [4- (2,3-epoxypropoxy) -3,
5-dimethylphenylmethyl] acrylamide, N-methylolacrylamide and the like can be mentioned.

Further, the radical initiator used as necessary when modifying the thermoplastic elastomer used in the present invention is not particularly limited as long as it is known, and examples thereof include dicumyl peroxide and di-. tert-butyl peroxide, tert-butyl cumyl peroxide, 2,5-dimethyl-2,5-di (tert-butylperoxy) hexane, 2,5-dimethyl-2,5
-Di (tert-butylperoxy) hexyne-3, n
-Butyl-4,4-bis (tert-butylperoxy) valerate, 1,1-bis (tert-butylperoxy) 3,3,5-trimethylcyclohexane, te
rt-butylperoxytriphenylsilane and te
Examples thereof include rt-butylperoxytrimethylsilane, and one or more kinds can be suitably selected from these. Further, as another radical initiator of organic peroxide,
2,3-dimethyl-2,3-diphenylbutane, 2,3
-Diethyl-2,3-diphenylbutane, 2,3-dimethyl-2,3-di (p-methylphenyl) butane, 2,
The modification reaction may be carried out using a compound such as 3-dimethyl-2,3-di (bromophenyl) butane.

The amount of the radical initiator used for modifying the thermoplastic elastomer is usually 0.01 to 10 parts by weight, preferably 0.05 to 10 parts by weight based on 100 parts by weight of the polyolefin elastomer, the diene elastomer or the polystyrene elastomer. 5 parts by weight. The modified polyolefin-based elastomer, modified diene-based elastomer or modified styrene-based elastomer can be produced by melt-kneading modification or solution-mixing modification.

Specific examples of the polyolefin-based elastomer suitable as the thermoplastic elastomer to be added to the polyphenylene sulfide-based resin composition of the present invention include, for example,
Ethylene-acrylic acid copolymer, ethylene-methacrylic acid copolymer, ethylene-glycidyl acrylate copolymer, ethylene-glycidyl methacrylate copolymer, ethylene-vinyl acetate copolymer, ethylene-maleic anhydride, and as a modified product Is ethylene-propylene-5-
Ethylidene-2-norbornene copolymer, ethylene-propylene-dicyclopentadiene copolymer, ethylene-
Maleic anhydride modified product of propylene copolymer and ethylene-butene-1 copolymer, glycidyl methacrylate modified product and N- [4- (2,3-epoxypropoxy)-
2,5-dimethylphenylmethyl] acrylamide modified products and the like can be mentioned.

Specific examples of the diene elastomer suitable as a thermoplastic elastomer to be added to the polyphenylene sulfide resin composition of the present invention include polybutadiene containing a carboxyl group or an epoxy group, hydride of polybutadiene and hydrogen of polyisoprene. Maleic anhydride modified product, glycidyl methacrylate modified product and N- [4- (2,3-epoxypropoxy) -2,
5-dimethylphenylmethyl] acrylamide modified products and the like can be mentioned.

A specific example of a polystyrene-based elastomer suitable as a thermoplastic elastomer to be added to the polyphenylene sulfide-based resin composition of the present invention is styrene-
Butadiene block copolymer and its hydrogenated block copolymer, styrene-isoprene block copolymer and its hydrogenated block copolymer, and modified products include styrene-butadiene hydrogenated block copolymer and styrene-
Maleic anhydride modified product of isoprene hydrogenated block copolymer, glycidyl methacrylate modified product and N- [4-
(2,3-epoxypropoxy) -2,5-dimethylphenylmethyl] acrylamide modified product and the like can be mentioned.
The thermoplastic elastomer added to the polyphenylene sulfide-based resin composition of the present invention may be used alone or in combination of two or more.

Composition Ratio of Constituents The composition ratio of the components (a), (b), (c) and (d) of the present invention is
It is as follows for 100 parts by weight of the total of (a) and (b). The component (a) is 10 to 90 parts by weight, preferably 20 to 80 parts by weight, more preferably 30 to 70 parts by weight,
It is particularly preferably 50 to 70 parts by weight. Component (a) is 1
If it is less than 0 parts by weight, the solvent resistance is poor and it is not preferable.
If it exceeds the weight part, the heat resistance and rigidity are not sufficient, which is not preferable.

Component (b) is 90 to 10 parts by weight, preferably 80 to 20 parts by weight, more preferably 70 to 30 parts by weight.
Parts by weight, particularly preferably 50 to 30 parts by weight. component
If (b) is more than 90 parts by weight, the solvent resistance is inferior, and if it is less than 10 parts by weight, the heat resistance and rigidity are not sufficient, which is not preferable. The addition amount of the component (c) phenol compound is 0.01 to 10 parts by weight, preferably 0.1 to 5 parts by weight, based on 100 parts by weight of the components (a) and (b) in total. If the blending amount is less than 0.01 parts by weight, the compatibility of both resins is not sufficiently improved, and if it is added in excess of 10 parts by weight, physical properties such as impact strength are deteriorated, which is not preferable.

The addition amount of the alkali metal salt of the component (d) is 0.01 to 100 parts by weight of the total of the components (a) and (b).
It is 10 parts by weight, preferably 0.1 to 5 parts by weight. 0.
If it is less than 01 parts by weight, the physical properties such as impact strength of the molded product will be deteriorated and the appearance will be deteriorated, and if it is added in excess of 10 parts by weight, gas will be generated during molding and the physical properties such as impact strength will be deteriorated. Not preferable.

Production Method of Thermoplastic Resin Composition and Molding Method The production method of the resin composition of the present invention is not limited to a particular method, but is preferably a melt kneading. As the melt-kneading method, a kneading method generally used for thermoplastic resins can be applied. For example, powdery, granular, or liquid components are uniformly mixed with the additives described in the additional components section, if necessary, using a Henschel mixer, ribbon blender, V-type blender, etc., and then uniaxially or It can be kneaded with a multi-screw kneading extruder, roll, Banbury mixer or the like. Each component including the above-mentioned additional components may be fed all at once during kneading or sequentially. Alternatively, a mixture of two or more components may be used. The temperature of the melt kneading is 150 to 370.
C., preferably 250 to 350.degree. Molding method of the resin composition of the present invention is not particularly limited, a molding method generally used for thermoplastic resins, that is, injection molding, blow molding, extrusion molding, sheet molding,
A molding method such as thermoforming or compression molding can be applied.

[0044]

EXAMPLES The present invention will now be specifically described with reference to examples, but the present invention is not limited to these examples. The components used are as follows. Component (a) Polyphenylene sulfide A polyphenylene sulfide resin (trade name: Toprene T-7) manufactured by Topren Co., Ltd. was used. (In the table, represented by PPS.) Component (b) Polyphenylene ether Poly (2,6-dimethyl-1,4 ) manufactured by Nippon Polyether Co., Ltd.
-Phenylene ether) (intrinsic viscosity 0.4 dl / g measured in chloroform at 30 ° C) was used. (P in the table
Expressed as PE. )

Component (c) Phenolic compound n-octadecyl-3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate (trade name: Irganox 1076, manufactured by Ciba Geigy), tetrakis {methylene -3- (3,5-di-te
rt-Butyl-4-hydroxyphenyl) propionate} methane (trade name: Irganox 1010, manufactured by Ciba Geigy), 3,9-bis [2- {3- (3-t
ert-Butyl-4-hydroxy-5-methylphenyl) propionyloxy} -1,1-dimethylethyl]-
2,4,8,10-Tetraoxaspiro [5,5] undecane (trade name: Sumilizer GA-80, manufactured by Sumitomo Chemical Co., Ltd.) was used.

Component (d) Alkali metal salt Sodium ethoxide (represented by NaOEt in the table) and sodium hydroxide (represented by NaOH in the table) were used. Other phenol compounds 2,6-di-tert-butyl-4-methylphenol (trade name: BHT, manufactured by Yoshitomi Pharmaceutical Co., Ltd.), 1,3,5-trimethyl-2,4,6-tris (3,5- The-tert-
Butyl-4-hydroxybenzyl) benzene (trade name:
Irganox 1330, manufactured by Ciba Geigy), tris (3,5-di-tert-butyl-4-hydroxybenzyl) isocyanurate (trade name: Goodlight 3)
114, manufactured by Goodrich Co., Ltd.) were used.

Additional component Hydrogenated styrene-butadiene-styrene block copolymer (trade name: Kraton G1651, manufactured by Shell Chemical Co.)
(Represented by SEBS in the table) was used. <Example 1> 70 parts by weight of polyphenylene sulfide,
After dry blending 30 parts by weight of polyphenylene ether, 0.3 parts by weight of Irganox 1010 and 1.0 part by weight of sodium ethoxide, using a Labo Plastomill manufactured by Toyo Seiki Co., a temperature of 310 ° C. and a rotation speed of the rotor. Kneading was performed at 180 rpm for 5 minutes. After the kneading was completed, it was crushed by a crusher into particles. Using a compression molding machine manufactured by Toyo Seiki Co., Ltd., the granular sample was molded into a sheet having a thickness of 2 mm at a temperature of 310 ° C. 120 in a hot air dryer
The mixture was heated at 4 ° C. for 4 hours to sufficiently crystallize the polyphenylene sulfide. A test piece for physical property evaluation was cut from this sheet.

The test pieces for evaluation of physical properties were evaluated after being stored in a desiccator for 2 days. Flexural rigidity is JIS-K-71
It was measured at 23 ° C. according to 06. Impact strength is J
According to IS-K-7110, three 2 mm-thick test pieces were stacked and measured with an Izod impact tester. The dispersion form was obtained by cutting a part of the sheet and using a scanning electron microscope S-2400 manufactured by Hitachi, Ltd. at a magnification of 1000 times and 5 times.
It was observed at a magnification of 000. From the observed morphological photographs, the number average dispersed particle diameter Dn was determined by the following equation using a SPICCA II type image analyzer manufactured by Nippon Avionics Co., Ltd.

[0049]

## EQU1 ## Dn = Σnidi / Σni di is the measured value of the dispersed particle size ni is the number of dispersed particles of the dispersed particle size di. Good appearance: ○, worse than this: △: surface is not problematic Those that were rough and had problems in practical use were marked with x. The results are shown in Table 1. <Examples 2-9, Comparative Examples 1-6> Test pieces were obtained in the same manner as in Example 1 with the formulations shown in Table 1 or Table 2. The results are shown in Table 1 or Table 2.

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[Table 1]

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[Table 2]

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EFFECT OF THE INVENTION The polyphenylene sulfide-based resin composition of the present invention uses polyphenylene sulfide, polyphenylene ether, a specific phenol compound and an alkali metal salt, whereby the compatibility of polyphenylene sulfide and polyphenylene ether is remarkably improved, and rigidity, It is a thermoplastic resin composition that gives a molded article excellent in impact strength and appearance.

Claims (1)

[Claims] 1. A polyphenylene sulfide-based resin composition containing the following components (a), (b), (c) and (d). (a) Polyphenylene sulfide 10 to 90 parts by weight (b) Polyphenylene ether 90 to 10 parts by weight (c) Phenol compound represented by the general formula (I) (In the formula, R ¹ , R ² , R ³ and R ⁴ are hydrogen atoms or carbon atoms 1
Represents 18 to 18 hydrocarbon groups and may be the same or different from each other. Z represents a monovalent to tetravalent hydrocarbon residue, and n represents an integer of 1 to 4. 0.01 to 10 parts by weight per 100 parts by weight of the total of components (a) and (b). (D) An alkali metal salt is added in an amount of 0. 01-10 parts by weight