JPH1160949A - Polyphenylene sulfide resin composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a polyphenylene sulfide resin composition improved in moldability without deteriorating the excellent various characteristics of a polyphenylene sulfide resin by adding a terpene resin to the polyphenylene sulfide resin. SOLUTION: This polyphenylene sulfide resin composition is obtained by adding 1.0-10.0 wt.% of a terpene resin to the polyphenylene sulfide resin. Therein, the terpene resin includes a terpene resin comprising only the terpene component units, aromatic modified terpene resins each containing an aromatic component, terpenephenol resins each containing a phenol component, and their hydrogenation product resins.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a polyphenylene sulfide-based resin composition having excellent moldability.

[0002]

2. Description of the Related Art Polyphenylene sulfide resin has hardness, mechanical strength, dimensional stability, low coefficient of friction, low wear,
At present, it is widely used as an engineering plastic having excellent heat resistance, chemical resistance, electrical properties, and the like in various fields such as electricity, electronics, OA, precision instruments, automobiles, and household goods.

As described above, the polyphenylene sulfide resin has various characteristics required as an engineering plastic, and therefore has a great feature that it can be used for a wide range of applications. However, it is hard and brittle at room temperature, so that glass, carbon fiber, and the like are used. Since an inorganic filler is used, the melt viscosity increases and the moldability decreases.

[0004] Conventionally, polyphenylene sulfide resins to which a filler has been added have many problems in injection molding due to their high melt viscosities.

[0005] As described above, polyphenylene sulfide-based resins have excellent physical properties, but they are not sufficiently balanced with moldability, and the moldability is secured at the expense of excellent physical properties to some extent. Often do. Therefore, a method of modifying polyphenylene sulfide having good moldability without impairing the excellent physical properties of the polyphenylene sulfide-based resin has been strongly desired.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a polyphenylene sulfide-based resin composition which has improved flowability during heating and melting and has excellent moldability without impairing the excellent properties of the polyphenylene sulfide-based resin. With the goal.

[0007]

In order to solve the above problems, the present invention has proposed the following polyphenylene sulfide-based resin composition. That is, 1.0 to 10.0% by weight of the terpene resin is added to the polyphenylene sulfide resin.
And a polyphenylene sulfide-based resin composition.

The polyphenylene sulfide resin used in the present invention is a polymer obtained by reacting paradichlorobenzene and sodium sulfide (Philips method) or a polymer obtained by oxidative coupling of disulfide, short benzene and sulfur in bulk. It may be any of polymers produced by a usual production method such as a polymer obtained by the reaction. The polymer may be either a crosslinked polymer or a linear polymer. Further, a polyphenylene sulfide resin containing a reinforcing agent such as glass fiber and a filler is also used.

The terpene resin used in the present invention may be a terpene monomer alone or a terpene monomer and an aromatic monomer in an organic solvent in the presence of a Friedel-Crafts type catalyst.
Or it is obtained by copolymerizing a terpene monomer and a phenol. Further, a hydrogenated terpene resin obtained by subjecting the obtained terpene resin to a hydrogenation treatment may be used.

As terpene monomers, α-pinene, β-
Examples include pinene, dipentene, and d-limonene, and examples of the aromatic monomer include styrene, α-methylstyrene, and vinyltoluene. Phenols include phenol, cresol, bisphenol A and the like.

The terpene-based resin thus obtained is, for example, “YS Resin PX” from Yashara Chemical Co., Ltd.
(Terpene resin), "YS resin TO" (aromatic modified terpene resin), "YS resin TR" (aromatic modified terpene resin), "Clearon" (hydrogenated terpene resin), "Y
It is commercially available under the trade names S-Polystar (terpene phenol resin) and Mighty Ace (terpene phenol resin) and can be easily obtained.

The compounding amount of the terpene resin compounded in the present invention is 1.0 to 10.0% by weight, preferably 3.0.
~ 5.0% by weight. If it is less than 1.0% by weight, the effect of modifying the moldability (flowability) is poor, and if it is 10.1% by weight or more, the thermal and mechanical properties are significantly reduced.

When the polyphenylene sulfide-based resin composition of the present invention is used for injection molding, a molded article excellent in moldability can be obtained without impairing the excellent properties of the polyphenylene sulfide-based resin.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described more specifically with reference to the following examples. Example 1 A polyphenylene sulfide resin “Torelina A504” (GF40%, standard type) manufactured by Toray Industries, Inc. was sufficiently preliminarily dried at 130 ° C. for 4 hours or more, and was then subjected to Yashara Chemical Co., Ltd.
3.0% by weight of a terpene resin “Clearon P-125” (hydrogenated terpene resin) was dry-blended and melt-mixed using a twin-screw extruder to form pellets. The pellets were evaluated for fluidity (moldability) by a spiral flow mold using an injection molding machine. Further, various test pieces conforming to ASTM were injection-molded, and the mechanical properties were evaluated. The results are shown in Table 1. The details of the preparation and evaluation method of the test piece were performed by the following method. (1) Melt mixing conditions Equipment used: Labo Plastomill (manufactured by Toyo Seiki Seisaku-sho, Ltd.) Twin screw extruder, D = 20 mm, L / D = 25 Mixing conditions: 220-300 ° C. × 50-60 rpm Mixing conditions: Dry Blend (2) Fluidity test (spiral flow length, molding evaluation) Equipment used: Injection molding machine "FE80S12ASE" (manufactured by Nissei Plastic Industry Co., Ltd.) 1) Cylinder temperature: H1 / H2 / H3 / H4 / = 30
0/310/320/320 ° C 2) Mold: 2 mm spiral flow mold 3) Mold temperature: 140-145 ° C 4) Evaluation injection pressure: 553 kg / cm2 5) Injection time: 10 sec, cooling time: 20 sec 6) Measuring position: 50mm, cylinder margin: 5-10m
m (3) Preparation of test piece Apparatus used: injection molding machine "FE80S12ASE" (manufactured by Nissei Plastic Industry Co., Ltd.) 1) Cylinder temperature: H1 / H2 / H3 / H4 / = 30
0/310/320/320 ° C 2) Mold temperature: 140-145 ° C 3) Injection pressure: 553 kg / cm2 (gauge pressure: 42K)
g / cm2) 4) Injection time: 10 sec, Cooling time: 20 sec 5) Measuring position: 30 mm, Cylinder allowance: 5 to 10 m
m 6) Molded test piece: No. 1 dumbbell for ASTM tensile test,
Test piece for bending, Izod impact, and thermal deformation (4) Mechanical property test 1) Tensile strength (according to ASTM D638) Equipment: Shimadzu Autograph AGS-10KND Tensile speed: 5 mm / min Measurement temperature, humidity: 23 ° C, 50% 2) Flexural strength and flexural modulus (according to ASTM D790) Equipment: Shimadzu Autograph AGS-10KND Bending speed: 3 mm / min Measurement temperature, humidity: 23 ° C, 50% 3) Izod impact strength (according to ASTM D256) Apparatus: Izod impact tester (manufactured by Toyo Seiki Seisaku-sho, Ltd.) W = 1.592 kg, R = 11.06 cm, α = 135
° 4) Heat deformation temperature (according to ASTM D648) Apparatus: HDT & VICAT tester S-3M (manufactured by Toyo Seiki Seisaku-sho, Ltd.) Bending stress: 18.5 kg · f / cm 2

Example 2 Clearon P-125 used in Example 1
0% by weight of an aromatic modified terpene resin "YS Resin TO-
3.0% by weight of 125 "(manufactured by Yashara Chemical Co., Ltd.)
The evaluation was performed in exactly the same manner as in Example 1 except for changing to. The results are shown in Table 1.

Example 3 Clearon P-125 used in Example 1
0% by weight of terpene phenol resin “YS Polystar U”
The evaluation was performed in the same manner as in Example 1 except that the weight was changed to 3.0% by weight of -145 "(manufactured by Yashara Chemical Co., Ltd.). The results are shown in Table 1.

Example 4 Clearon P-125 used in Example 1
0% by weight of terpene phenolic resin "Mighty Ace G"
The evaluation was performed in exactly the same manner as in Example 1 except that the weight was changed to 3.0% by weight of -150 "(manufactured by Yashara Chemical Co., Ltd.). The results are shown in Table 2.

Example 5 Clearon P-125 used in Example 1
0% by weight of terpene phenol resin "DLN-140"
The evaluation was performed in the same manner as in Example 1 except that the weight was changed to 3.0% by weight (manufactured by Yashara Chemical Co., Ltd.). The results are shown in Table 2.

Example 6 Evaluation was performed in the same manner as in Example 1 except that the amount of Clearon P-125 used in Example 1 was changed from 3.0% by weight to 1.0% by weight. The results are shown in Table 2.

Example 7 Evaluation was performed in the same manner as in Example 1 except that the amount of Clearon P-125 used in Example 1 was changed from 3.0% by weight to 5.0% by weight. The results are shown in Table 3.

Example 8 Evaluation was performed in the same manner as in Example 1 except that the amount of Clearon P-125 used in Example 1 was changed from 3.0% by weight to 10.0% by weight. The results are shown in Table 3.

Comparative Example 1 Clearon P-125 used in Example 1
Evaluation was performed in the same manner as in Example 1 except that 0% by weight was not used at all. The results are shown in Table 4.

Comparative Example 2 Evaluation was performed in the same manner as in Example 1 except that the amount of Clearon P-125 used in Example 1 was changed from 3.0% by weight to 0.9% by weight. The results are shown in Table 4.

Comparative Example 3 Evaluation was performed in the same manner as in Example 1 except that the amount of Clearon P-125 used in Example 1 was changed from 3.0% by weight to 10.1% by weight. The results are shown in Table 4.

[0025]

[Table 1]

[0026]

[Table 2]

[0027]

[Table 3]

[0028]

[Table 4]

From the evaluation results shown in Tables 1 to 4, the polyphenylene sulfide-based resin composition of the present invention containing 1.0 to 10.0% by weight of a terpene-based resin shows various mechanical properties (tensile strength, bending strength). It can be seen that the fluidity (moldability) is improved without significantly lowering the strength, heat deformation temperature, impact strength).

[0030]

The polyphenylene sulfide-based resin composition of the present invention does not require a complicated chemical treatment which increases the cost, and simply blends a terpene-based resin.
An improvement in fluidity (moldability) can be achieved without impairing the excellent properties of the polyphenylene sulfide-based resin, which is extremely useful industrially.

Claims (1)

[Claims] 1. A polyphenylene sulfide-based resin composition comprising 1.0 to 10.0% by weight of a terpene-based resin mixed with a polyphenylene sulfide-based resin.