JPH10237150A - Polyphenylene sulfide resin composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a polyphenylene sulfide resin composition having excellent toughness, impact resistance, weld strength and molding processability. SOLUTION: This phenylene sulfide resin composition comprises (a) 67-98.8wt.% of a polyphenylene sulfide having >=200 poise melt viscosity after polymerization and 500-30,000 poise melt viscosity after heating and curing and containing 0.05-5mol% of amino group per phenylene sulfide unit, (b) 0.1-3wt.% of a polyfunctional isocyanate and (c) 1-30wt.% of a maleic anhydride- modified ethylene-based copolymer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a polyphenylene sulfide resin composition having excellent toughness, impact resistance, weld strength and moldability.

[0002]

2. Description of the Related Art Polyphenylene sulfide has high heat resistance,
A resin exhibiting excellent properties such as chemical resistance and moldability. Utilizing such excellent properties, it is widely used in electric / electronic equipment members, automobile equipment members, OA equipment members, and the like.

Polyphenylene sulfide can greatly improve mechanical strength, heat resistance, rigidity and the like by blending a fibrous inorganic filler such as glass fiber and the like and a particulate inorganic filler such as calcium carbonate and talc. However, as compared with various engineering plastics such as polyamide, polycarbonate, polybutylene terephthalate, and polyacetal, they have serious drawbacks such as poor toughness and fragility. This limits their application to many applications.

Conventionally, as a technique for improving the impact resistance of polyphenylene sulfide, blending of an ethylene copolymer has been known. For example, JP
JP-A-151460 (resin composition comprising an ethylene copolymer comprising polyarylene sulfide, an alkyl ester of α, β-unsaturated carboxylic acid, and maleic anhydride) and the like are reported.

However, Japanese Patent Application Laid-Open No. 62-151460 discloses
In the resin composition disclosed in Japanese Patent Application Publication No. H10-187, although the effect of improving impact resistance is seen, tensile elongation, which is an important material property in use in various equipment members, the effect of improving weld strength is not seen, Due to significant burr generation during molding,
Deteriorates the excellent moldability of polyphenylene sulfide.

Further, as a technique for further improving the impact resistance of polyphenylene sulfide, there is disclosed, for example, Japanese Patent Application Laid-Open No. 2-255852 (a polyphenylene sulfide obtained by melt-kneading a polyphenylene sulfide and a non-block type polyfunctional isocyanate compound). a resin composition comprising an ethylene copolymer comprising an α, β-unsaturated carboxylic acid alkyl ester and maleic anhydride).

However, although the resin composition disclosed in Japanese Patent Application Laid-Open No. 2-255860 has an effect of improving impact resistance, tensile elongation and weld strength, which are important material properties for use in various equipment members, are exhibited. Also, no effect of improving the moldability is observed. In addition, Japanese Patent Application Laid-Open No. 25586/1990
No. 2 clearly states that the use of a blocked isocyanate compound regenerated at a high temperature has almost no improvement effect on impact resistance.

[0008]

SUMMARY OF THE INVENTION The present invention provides a polyphenylene sulfide resin composition having excellent toughness, impact resistance, weld strength and moldability.

[0009]

Means for Solving the Problems The present inventors have made intensive studies to solve the above-mentioned problems, and as a result, have completed the present invention.

That is, according to the present invention, (a) the melt viscosity after polymerization is 200 poise or more, the melt viscosity after heat curing is 500 to 30000 poise, and the amino group per phenylene sulfide unit is 0.05 to 0.05 poise. 67 to 98.8% by weight of polyphenylene sulfide containing 5 mol%,
(B) 0.1 to 3% by weight of a polyfunctional isocyanate and (c) maleic anhydride-modified ethylene copolymers 1 to 30
The present invention relates to a polyphenylene sulfide resin composition characterized by comprising by weight%, and a polyphenylene sulfide resin composition further containing 5 to 100 parts by weight of glass fiber.

Hereinafter, the present invention will be described in detail.

The amino group-containing polyphenylene sulfide used in the present invention has an amino group content of 0.05 to 5 mol% per phenylene sulfide unit. Preferably it is 0.1 to 3 mol%. If the amino group content of polyphenylene sulfide is less than 0.05 mol%, the effect of including amino groups in polyphenylene sulfide is small,
On the other hand, if it exceeds 5 mol%, the mechanical strength is lowered, which is not preferable. A content of 0.1 to 3 mol% is particularly preferable because of excellent toughness and mechanical strength.

The melt viscosity of the amino group-containing polyphenylene sulfide used in the present invention after polymerization is measured at a measurement temperature of 31.
Under the conditions of 5 ° C. and a load of 10 kg, the diameter is 0.5 mm and the length is 2
The melt viscosity measured with a Koka type flow tester using a 200 mm die is 200 poise or more, preferably 400 poise or more. If the melt viscosity after polymerization is less than 200 poise, the effect of improving toughness and weld strength is poor, which is not preferable. If the melt viscosity after the polymerization is 400 poise or more, the toughness and the weld strength are particularly excellent, which is preferable.

The melt viscosity of the amino group-containing polyphenylene sulfide used in the present invention after heat curing is 1 mm in diameter at a measuring temperature of 315 ° C. under a load of 10 kg.
The melt viscosity measured with a Koka type flow tester using a die having a length of 2 mm is 500 to 30,000 poise, preferably 1,000 to 20,000 poise. If the melt viscosity after heat curing is less than 500 poise, the effect of improving toughness and weld strength is poor, which is not preferable. On the other hand, if it exceeds 30,000 poise, it is difficult to form and process, which is not preferable. 1000
ポ 20,000 poises are particularly preferred because they show particularly excellent improvement effects and are excellent in moldability.

Furthermore, the amino group-containing polyphenylene sulfide used in the present invention has a structural unit of

[0016]

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Preferably, it contains 70 mol% or more, especially 90 mol% or more.

If the constituent unit is less than 30 mol%, preferably less than 10 mol%, the following m-phenylene sulfide unit is used.

[0019]

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O-phenylene sulfide unit

[0021]

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Phenylene sulfide sulfone unit

[0023]

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Phenylene sulfide ketone unit

[0025]

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Phenylene sulfide ether unit

[0027]

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Diphenylene sulfide unit

[0029]

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Such copolymer units may be contained.

The method for producing the amino group-containing polyphenylene sulfide used in the present invention is not particularly limited. However, when the alkali metal sulfide and the dihalobenzene are reacted in an organic amide solvent, the amino group-containing aromatic compound is reacted. And a method in which polymerization is carried out in the presence of a group halide.

As the alkali metal sulfide, lithium sulfide, sodium sulfide, potassium sulfide, rubidium sulfide,
Mention may be made of cesium sulfide and mixtures thereof, which may be used in the form of hydrates. These alkali metal sulfides are obtained by reacting an alkali metal hydrosulfide with an alkali metal base, and may be adjusted in-situ prior to the addition of dihalobenzene into the polymerization system or adjusted outside the system. Can be used.

The amino group-containing aromatic halide is represented by the general formula

[0034]

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(X is halogen, Y is hydrogen, -NH ₂ group or halogen, R is a hydrocarbon group having 1 to 12 carbon atoms, n is 0
Which is an integer of 1 to 4).

Some examples are m-fluoroaniline, m-chloroaniline, 3,5-dichloroaniline, 3,5-diaminochlorobenzene, 2-amino-4
-Chlorotoluene, 2-amino-6-chlorotoluene,
4-Amino-2-chlorotoluene, 3-chloro-m-phenylenediamine, m-bromoaniline, 3,5-dibromoaniline, m-iodoaniline and mixtures thereof. Particularly, 3,5-diaminochlorobenzene and 3,5-dichloroaniline are preferred.

Examples of the dihalobenzene include p-dichlorobenzene, p-dibromobenzene, p-diiodobenzene, m-dichlorobenzene, m-dibromobenzene and m-dibromobenzene.
-Diiodobenzene, 1-chloro-4-bromobenzene and the like.

The charged amounts of the alkali metal sulfide and (dihalobenzene + amino group-containing aromatic halide) are (molar ratio of alkali metal sulfide) :( dihalobenzene + amino group-containing aromatic halide) = 1. 00:
It is preferable to be in the range of 0.90 to 1.10.

As the polymerization solvent, a polar solvent is preferable.
Organic amides, which are particularly aprotic and stable to alkalis at high temperatures, are preferred solvents. Some examples of organic amides include N, N-dimethylacetamide, N, N-dimethylformamide, hexamethylphosphoramide, N
-Methyl-ε-caprolactam, N-ethyl-2-pyrrolidone, N-methyl-2-pyrrolidone, 1,3-dimethylimidazolidinone, dimethylsulfoxide, sulfolane, tetramethylurea and the like, and mixtures thereof.

The amount of the organic amide used as the solvent is 150 to 3 with respect to the polymer produced by the polymerization.
It can be used in an amount of 500% by weight, preferably 250 to 1500% by weight. Polymerization is 200-300
C., preferably at 220 to 280.degree. C. for 0.5 to 30 hours, preferably 1 to 15 hours under stirring.

Furthermore, even if the polyphenylene sulfide used in the present invention is linear, it is cured by heat treatment in an oxygen atmosphere or heat treatment with the addition of a peroxide or the like, and the Is raised,
Heat treatment in a non-oxidizing inert gas may be performed, or a mixture of these structures may be used. Further, the polyphenylene sulfide may be one in which ions are reduced by performing a deionization treatment (acid washing, hot water treatment, or the like).

The amount of the amino group-containing polyphenylene sulfide used in the present invention is 67 to 98.8% by weight, preferably 75 to 95% by weight. 67% by weight
If it is less than 98.8% by weight or more than 98.8% by weight, the effect of improving the present invention is small, so that it is not preferable. 75 to 95% by weight is preferable since the improvement effect of the present invention is remarkable.

As the polyfunctional isocyanate used in the present invention, commercially available block type and non-block type isocyanates can be used.

The polyfunctional blocked isocyanate used in the present invention has two or more isocyanate groups in the molecule, and reacts the isocyanate group with a volatile active hydrogen compound to become inactive at ordinary temperature. It was done. Although the type of the polyfunctional blocked isocyanate is not particularly limited, generally, alcohols, phenols, ε-
It has a structure in which isocyanate groups are masked by a blocking agent such as caprolactam, oximes, and active methylene compounds. These blocked isocyanates generally have excellent storage stability because they do not react at room temperature,
Usually, the isocyanate group is regenerated by heating at 140 to 200 ° C., and shows excellent reactivity.

The polyfunctional non-blocking isocyanate used in the present invention is, specifically, 4,4'-diphenylmethane diisocyanate, 4,4'-diphenylpropane diisocyanate, toluene diisocyanate, phenylene diisocyanate, bis ( 4-isocyanatophenyl) sulfone, triisocyanate benzene and the like.

Particularly, a polyfunctional blocked isocyanate is preferred from the viewpoint of handling such as effect, toxicity and storage stability.

The amount of the polyfunctional isocyanate used in the present invention is 0.1 to 3% by weight, preferably 0.2 to 2% by weight.
% By weight. If the compounding amount is less than 0.1% by weight, the improvement effect of the present invention is small, and if it exceeds 3% by weight, generation of decomposition gas and molding contamination during molding are not preferable. When the compounding amount is 0.2 to 2% by weight, the improvement effect is remarkable,
In addition, gas generation and mold contamination are suppressed, which is preferable.

As the maleic anhydride-modified ethylene copolymer used in the present invention, commercially available ones can be used. Although the type of the maleic anhydride-modified ethylene copolymer used in the present invention is not particularly specified, the flexural rigidity [measurement method is AS
TM D747 (1995) compliant] is 800 kg / c
m ² or less and a tensile elongation at break [Measurement method JIS K6
730 (1995) compliant]
This is preferable because the improvement effect of the present invention is particularly remarkable.

The amount of the maleic anhydride-modified ethylene copolymer used in the present invention is 1 to 30% by weight, preferably 3 to 20% by weight. If the compounding amount is less than 1% by weight, the improvement effect of the present invention is small. When the amount is 3 to 20% by weight, the improvement effect is remarkable, and generation of gas is suppressed, which is preferable.

In the present invention, the use of glass fibers is preferably used because the mechanical strength is improved.
The glass fiber used in the present invention has an average fiber diameter of 3 to 20.
Rovings, chopped strands, milled fibers and the like having a μm are used. In addition, in glass fiber,
Usually, treatment with a binder is performed to improve the adhesion to the resin. Examples of the binder include urethane-based, epoxy-based and urethane-epoxy combined systems, and particularly, epoxy-based and urethane-epoxy combined systems are preferable because of their excellent adhesion to resins and heat resistance.

The amount of glass fiber used in the present invention is as follows: (a) the melt viscosity after polymerization is 200 poise or more, the melt viscosity after heat curing is 500 to 30,000 poise, and phenylene sulfide is used. 67 to 98.8% by weight of polyphenylene sulfide containing 0.05 to 5% by mole of amino group per unit, 0.1 to 3% by weight of (b) polyfunctional isocyanate, and (c) maleic anhydride-modified ethylene copolymer It is 5 to 100 parts by weight, preferably 10 to 100 parts by weight in total of 1 to 30% by weight.
７０70 parts by weight. This range is preferable because the improvement effect of the present invention is not impaired.

The resin composition of the present invention may be any of various thermosetting resins and thermoplastic resins, for example, an epoxy resin, a cyanate ester resin, a phenol resin, a polyimide, a silicone resin, a polyolefin, without departing from the object of the present invention. , Polyester, polyamide, polyphenylene oxide, polycarbonate, polysulfone, polyetherimide, polyethersulfone, polyetherketone,
One or more of polyether ether ketone, polyphenylene sulfide sulfone, polyphenylene sulfide ketone and the like can be used as a mixture.

In addition, without departing from the object of the present invention,
One or more kinds of powdery fillers such as calcium carbonate, mica, silica, talc, calcium sulfate, kaolin, clay, glass beads, glass powder and the like can be used as a mixture.

Further, the resin composition of the present invention may contain a conventionally known mold release agent, lubricant, heat stabilizer, antioxidant, ultraviolet absorber, crystal nucleating agent, foaming agent without departing from the object of the present invention. One or more additives such as a rust preventive, an ion trapping agent, a flame retardant, a flame retardant auxiliary, a coloring agent such as a dye and a pigment, and an antistatic agent may be used in combination.

As a method for producing the polyphenylene sulfide resin composition of the present invention, a conventionally used heat-melt kneading method can be used. For example, a heat-melt kneading method using a single-screw or twin-screw extruder, a kneader, a mill, a Brabender or the like can be mentioned, and a melt-kneading method using a twin-screw extruder having excellent kneading ability is particularly preferable. The kneading temperature at this time is not particularly limited, but is usually 280.
It can be arbitrarily selected from the range of ~ 400 ° C. further,
The obtained composition can be formed into an arbitrary shape using an injection molding machine, an extrusion molding machine, a transfer molding machine, a compression molding machine, or the like.

[0056]

EXAMPLES Hereinafter, the present invention will be described specifically with reference to Examples, but the present invention is not limited to only these Examples.

[0057] Reference Example 1 (Synthesis of an amino group-containing polyphenylene sulfide) 15l autoclave, the temperature was raised to N- methyl-2-pyrrolidone 5l charged, to _{120 ℃, Na 2 S · 2} .
1866 g of 8H ₂ O was charged, and the temperature was gradually raised to 205 ° C. while stirring over about 2 hours to distill 407 g of water. After cooling the system to 140 ° C., 2080 g of p-dichlorobenzene and 22.9 g (about 1 mol% based on p-dichlorobenzene) of 3,5-dichloroaniline were added, and the temperature was raised to 225 ° C. After polymerizing for hours,
The temperature was raised to 250 ° C., and the polymerization was further performed at 250 ° C. for 3 hours.

After completion of the polymerization, a part of the slurry cooled to room temperature was sampled, the filtrate was collected, and unreacted 3,5-dichloroaniline remaining in the filtrate was subjected to gas chromatography (GC-12A manufactured by Shimadzu Corporation). As a result, the conversion of 3,5-dichloroaniline was 70%. The remaining slurry was poured into a large amount of water to precipitate a polymer. The polymer was separated by filtration, washed with pure water, and then heated and vacuum-dried overnight to isolate the polymer. The melt viscosity of the obtained amino group-containing polyphenylene sulfide was 220 poise.

The polymer thus obtained was further subjected to a heat curing treatment at 235 ° C. in an air atmosphere to give a melt viscosity of 1500.
Poise. The amino group-containing polyphenylene sulfide thus obtained is referred to as PPS-I.

Reference Example 2 (Synthesis of amino group-containing polyphenylene sulfide) 3.4 g (about 0.15 mol% based on p-dichlorobenzene) of 3,5-dichloroaniline was added, and the other conditions were the same as in Reference Example 1. The polymerization was carried out by the operation of The melt viscosity of the obtained amino group-containing polyphenylene sulfide was 540 poise. The conversion of 3,5-dichloroaniline was 68%. The polymer thus obtained was further subjected to a heat curing treatment at 235 ° C. in an air atmosphere, and a melt viscosity of 60 ° C.
00 poise. The polyphenylene sulfide thus obtained is referred to as PPS-II.

Reference Example 3 (Synthesis of amino group-containing polyphenylene sulfide) 6.9 g of 3,5-dichloroaniline (about 0.3 mol% based on p-dichlorobenzene) was added, and the other conditions were the same as in Reference Example 1. The polymerization was carried out by the operation of The melt viscosity of the obtained amino group-containing polyphenylene sulfide was 480 poise. The conversion of 3,5-dichloroaniline is 6
9%. The polymer thus obtained was further heat-cured at 235 ° C. in an air atmosphere to obtain a melt viscosity of 150.
0 poise. The polyphenylene sulfide thus obtained is referred to as PPS-III.

Reference Example 4 (Synthesis of amino group-containing polyphenylene sulfide) 225 ° C using 2080 g of p-dichlorobenzene
After polymerization for 5 hours, a solution prepared by dissolving 20.2 g of 3,5-diaminochlorobenzene (about 1 mol% based on p-dichlorobenzene) in 50 ml of N-methyl-2-pyrrolidone was added to the system. Further, polymerization was carried out at 250 ° C. for 3 hours. Otherwise, polymerization was performed in the same manner as in Reference Example 1. The melt viscosity of the obtained polymer was 700 poise. The conversion of 3,5-dichloroaniline was 37%. The polymer thus obtained was further heat-cured at 235 ° C. in an air atmosphere to have a melt viscosity of 1500 poise. The amino group-containing polyphenylene sulfide thus obtained is referred to as PPS-IV.

Reference Example 5 (Synthesis of polyphenylene sulfide) 2080 g of p-dichlorobenzene (without addition of an amino group-containing aromatic halide) was added.
Polymerization was carried out in the same manner as described above. The melt viscosity of the obtained polyphenylene sulfide was 500 poise. The polymer thus obtained was further heat-cured at 235 ° C. in an air atmosphere to have a melt viscosity of 1500 poise. The polyphenylene sulfide obtained in this manner was converted to PPS-
V.

Reference Example 6 (Synthesis of amino group-containing polyphenylene sulfide) 1789 g of p-dichlorobenzene and 310 g of 3,5-diaminochlorobenzene (about 15% based on the total amount of p-dichlorobenzene and 3,5-diaminochlorobenzene)
Mol%), the temperature was raised to 250 ° C. over about 2 hours, and polymerization was performed at 250 ° C. for 3 hours to produce an amino group-containing polyphenylene sulfide in the same manner as in Reference Example 1. . The melt viscosity of the obtained polymer was too low to be measured. The conversion of 3,5-dichloroaniline was 38%. The polymer thus obtained was further subjected to a heat curing treatment at 235 ° C. in an air atmosphere to have a melt viscosity of 7000 poise. The amino group-containing polyphenylene sulfide obtained in this manner was converted to PPS-
VI.

Reference Example 7 (Synthesis of Amino Group-Containing Polyphenylene Sulfide) An amino group-containing polyphenylene sulfide synthesized in the same manner as in Reference Example 3 but not subjected to the heat curing treatment was heat-cured at 255 ° C. in an air atmosphere to obtain a melt viscosity. 50,000 poise. The amino group-containing polyphenylene sulfide thus obtained is referred to as PPS-VII.

Example 1 PPS-I obtained in Reference Example 1 and a polyfunctional blocked isocyanate (Takenate P, manufactured by Takeda Pharmaceutical Co., Ltd.)
W-2400), a maleic anhydride-modified ethylene copolymer (manufactured by Elf Atochem, Bondyne AX-839)
0 [bending rigidity <100 kg / cm ² , elongation at break of 900%]) and glass fibers (chopped strands having an average fiber diameter of 9 μm and a cut length of 3 mm) in a ratio shown in Table 1, and then a twin-screw extruder was used. The mixture was melt-kneaded at 300 ° C. and pelletized.

[0067]

[Table 1]

Then, in order to evaluate the tensile elongation, Izod impact strength and weld strength of the molded product, a test piece was prepared by an injection molding machine and measured. ASTM D638 (1995) for measurement of tensile elongation and weld strength
The measurement of Izod impact strength was performed according to ASTM D256 (199).
5 years). Further, the burr length in the examples is a value obtained by the following measuring method. A; 1 as shown in FIG.
Bar flow with a clearance of 0 μm (10 × 0.5
mmt) When a resin composition is molded using an injection molding machine at an injection pressure of 500 kg / cm ² using a mold,
The length of the burr generated in the clearance portion of A was measured using a universal projector, and the burr length was determined.

Table 2 shows the results. The obtained resin composition was excellent in toughness, impact resistance, weld strength, and moldability.

[0070]

[Table 2]

Example 2 The same operation and evaluation as in Example 1 were carried out, except that the PPS-II obtained in Reference Example 2 was used. Table 1 shows the composition
Table 2 shows the results. The resulting resin composition has toughness,
It was excellent in impact resistance, weld strength and moldability.

Examples 3 to 5 The same operations and evaluations as in Example 1 were performed, except that the PPS-III obtained in Reference Example 3 was used. Table 1 shows the composition
Table 2 shows the results. The resulting resin composition has toughness,
It was excellent in impact resistance, weld strength and moldability.

Example 6 The same operation and evaluation as in Example 1 were performed, except that the PPS-IV obtained in Reference Example 4 was used. Table 1 shows the composition
Table 2 shows the results. The resulting resin composition has toughness,
It was excellent in impact resistance, weld strength and moldability.

Example 7 PPS-IV and maleic anhydride-modified ethylene copolymer obtained in Reference Example 4 (Bondyne TX-4110, manufactured by Elf Atchem Co., Ltd. [flexural rigidity 750 kg / c
m ² , tensile elongation at break 700%], and the same operation and evaluation as in Example 1 were performed. Table 1 shows the composition
Table 2 shows the results. The resulting resin composition has toughness,
It was excellent in impact resistance, weld strength and moldability.

Example 8 The same operation and evaluation as in Example 1 were carried out, except that the PPS-IV obtained in Reference Example 4 was used. Table 1 shows the composition
Table 2 shows the results. The resulting resin composition has toughness,
It was excellent in impact resistance, weld strength and moldability.

Example 9 The same operation and evaluation as in Example 1 were performed, except that PPS-II obtained in Reference Example 2 was used. Table 1 shows the composition
Table 2 shows the results. The resulting resin composition has toughness,
It was excellent in impact resistance, weld strength and moldability.

Example 10 The same operation and evaluation as in Example 1 were carried out except that 4,4'-diphenylmethane diisocyanate was used as the polyfunctional isocyanate. The composition is shown in Table 1 and the results are shown in Table 2. The obtained resin composition was excellent in toughness, impact resistance, weld strength, and moldability.

Comparative Example 1 Using the PPS-II obtained in Reference Example 2, each component was as shown in Table 1.
The same operation and evaluation as in Example 1 were performed. Table 2 shows the results. The obtained resin composition was excellent in moldability, but was inferior in all of toughness, impact resistance and weld strength.

Comparative Example 2 Using the PPS-II obtained in Reference Example 2, each component was as shown in Table 1.
The same operation and evaluation as in Example 1 were performed. Table 2 shows the results. The obtained resin composition was inferior in all of toughness, impact resistance, weld strength and moldability.

Comparative Example 3 Using PPS-V obtained in Reference Example 5, each component was blended at the ratio shown in Table 1, and the same operation and evaluation as in Example 1 were performed. Table 2 shows the results. The obtained resin composition was inferior in all of toughness, impact resistance, weld strength and moldability.

Comparative Example 4 Using the PPS-VI obtained in Reference Example 6, each component was evaluated as shown in Table 1.
The same operation and evaluation as in Example 1 were performed. Table 2 shows the results. The obtained resin composition had extremely low toughness.

Comparative Example 5 Using PPS-III obtained in Reference Example 3, each component was blended at the ratio shown in Table 1, and the same operation and evaluation as in Example 1 were performed. Table 2 shows the results. The obtained resin composition is
The toughness, impact resistance, weld strength, and moldability were all poor.

Comparative Example 6 Using PPS-III obtained in Reference Example 3, each component was blended at the ratio shown in Table 1, and the same operation and evaluation as in Example 1 were performed. Table 2 shows the results. The obtained resin composition is
Although it was excellent in toughness, impact resistance and weld strength, the amount of gas generated during pellet drying and molding was very large, and was not practically usable.

Comparative Example 7 Using PPS-III obtained in Reference Example 3, each component was blended at the ratio shown in Table 1, and the same operation and evaluation as in Example 1 were performed. Table 2 shows the results. The obtained resin composition is
Although the weld strength was excellent, the toughness and impact resistance were poor.

Comparative Example 8 Using PPS-III obtained in Reference Example 3, each component was blended at the ratio shown in Table 1, and the same operation and evaluation as in Example 1 were performed. Table 2 shows the results. The obtained resin composition is
Molding could not be performed due to the large amount of generated gas.

Comparative Example 9 Using PPS-III obtained in Reference Example 3, each component was blended at the ratio shown in Table 1, and the same operation and evaluation as in Example 1 were performed. Table 2 shows the results. The obtained resin composition is
The toughness was remarkably low.

Comparative Example 10 Using PPS-VII obtained in Reference Example 7, each component was blended at the ratio shown in Table 1, and the same operation and evaluation as in Example 1 were performed. Table 2 shows the results. The obtained resin composition is
Due to the high melt viscosity, kneading and extrusion by a twin-screw extruder could not be performed.

Comparative Example 11 Using the PPS-II obtained in Reference Example 2, each component was as shown in Table 1.
The same operation and evaluation as in Example 1 were performed. Table 2 shows the results. Although the obtained resin composition was excellent in toughness, it was inferior in impact resistance, weld strength and moldability.

[0089]

As is apparent from the above description, according to the present invention, a specific amino group-containing polyphenylene sulfide is added to a specific amount of a polyfunctional isocyanate, a maleic anhydride-modified ethylene copolymer or a glass. By blending the fibers, a polyphenylene sulfide resin composition having excellent toughness, impact resistance, weld strength, and moldability can be obtained, and is useful for electric / electronic device members, automobile device members, OA device members, and the like. .

[Brief description of the drawings]

FIG. 1 is a bar flow mold used to measure the burr length of the composition of the present invention.

Claims (2)

[Claims] (1) The melt viscosity after polymerization is 200 poise or more, and the melt viscosity after heat curing is 500 to 30000.
67-98.8% by weight of polyphenylene sulfide which is poise and contains 0.05-5 mol% of amino groups per phenylene sulfide unit, (b) 0.1-3% by weight of polyfunctional isocyanate and (c) anhydrous A polyphenylene sulfide resin composition comprising 1 to 30% by weight of a maleic acid-modified ethylene copolymer. 2. A glass fiber of 5 to 10 parts by weight per 100 parts by weight of the polyphenylene sulfide resin composition according to claim 1.
A polyphenylene sulfide resin composition comprising 0 part by weight.