JPS59189166A - Polyarylene sulfide resin composition - Google Patents

Abstract

PURPOSE:To provide the titled compsn. which is freed from the problem of fragility without using a reinforcing fiber, by blending a specified olefin copolymer with a polyarylene sulfide. CONSTITUTION:The titled compsn. consists of 50-99.5wt% polyarylene sulfide (A) such as polyphenylene sulfide and 50-0.5wt% olefin copolymer (B) composed of an alpha-olefin such as ethylene and an alpha,beta-unsaturated acid glycidyl ester such as glycidyl (meth)acrylate. The resin A has excellent flame retardance, resistance to heat and chemicals, etc. and the demand therefor has increased in the fields of electrical parts, automotive parts, etc. but the resin has disadvantages in that it is poor in ductility and fragile. By incroporating the copolymer B, these disadvantages can be eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to polyarylene sulfide resin compositions with improved impact properties.

Polyarylene sulfide resins such as polyphenylene sulfide are used as engineering plastics with excellent heat resistance, flame retardancy, and chemical resistance.
In recent years, it has been attracting attention and demand is increasing, especially for applications such as electrical parts and automobile parts.

However, this resin has serious drawbacks such as poor ductility and brittleness. By blending fibrous reinforcing materials such as glass fiber and carbon fiber with the resin, the properties required for engineering plastics, such as strength, rigidity, toughness, heat resistance, and dimensional stability, are greatly improved. It has been known. However, even with the combination of fibrous reinforcing materials, it is still more brittle than other engineering plastics such as polyacetal, modified PpO, polysulfone, and polyethersulfone, making it difficult to use in many applications despite its excellent properties. Application to is limited. In addition, since blending the fibrous reinforcing material causes wear of processing machines, molds, etc., there has been a strong desire to improve the brittleness without blending the fibrous reinforcing material.

In view of the above-mentioned situation, the present inventor has conducted intensive research and has improved the above-mentioned drawbacks by blending an olefin-based copolymer consisting of an α-olefin and a glycidyl ester of an α,β-unsaturated acid into polyarylene sulfide. We have discovered that it is possible to do this, and have arrived at the present invention.

The present invention is based on polyarylene sulfide 50-99.
5 wt% and (c) α-olefin and α.

This is a polyarylene sulfide resin composition characterized by comprising 5 wt % of olefin copolymers 50 to Q consisting of glycidyl esters of β-unsaturated acids.

The polyarylene sulfide used in the present invention is a polymer represented by the general formula -+-Ar S''rrr, where -Ar- is a divalent polymer containing at least one 6-membered carbon ring, such as It is an aromatic residue, and each aromatic ring further includes F.

Substituents such as C2, Br, CHa, etc. may also be introduced.

In particular, polyphenylene sulfide, represented by the typical polyarylene sulfide, is commonly sold by Phillips Petroleum Company of the United States under the tradename 'Ly'n'. The manufacturing method is described in U.S. Patent No. 8,
Specification No. 354,129 and the corresponding Japanese Patent Publication No. 4
It is disclosed in Japanese Patent No. 5-3368, and can be produced by reacting a sulfiding sorter (Na2S-H2O) under pressure conditions of 160 to 250°C in an N-methylpyrrolidone solvent. In addition, Japanese Patent Publication No. 52-12240, Japanese Patent Publication No. 53-25588, and Japanese Patent Publication No. 5B-
As disclosed in Japanese Patent No. 25589, when a catalyst such as lithium acetate or lithium chloride is used in combination, PPS with a higher degree of polymerization can be produced.

The α-olefins used in the present invention are ethylene, propylene, butene, etc.
1, etc., and ethylene is more preferable. Also α, β−
A glycidyl ester of an unsaturated acid is a compound represented by the general formula (in the formula, k is a hydrogen atom or a lower alkyl group).
These include glycidyl phosphate, glycidyl methacrylate, and glycidyl ethacrylate, with glycidyl methacrylate being more preferred. The copolymerization R of α-β unsaturated polylycidyl ester is suitably in the range of 1 to 50 mol%. moreover,
Other unsaturated monomers that can be copolymerized with the above monomers if not more than 40 mol%, namely vinyl ethers; vinyl ester acids such as vinyl acetate and vinyl propionoate; acrylic acids and methacrylic acids such as methyl, ethyl, and proyl; Esters: One or more types of acrylonitrile, styrene, carbon oxide, etc. may be copolymerized.

The amount of these olefin copolymers to be blended into PPS is
(based on the total amount of pps and the olefin copolymer)
PPS 5 0-9 9. 5 wt%, (c) the olefin copolymer 50 to Q, 5 wt% is suitable, and PPS is 99. When the content of the olefin copolymer is more than 5 wL% and the content of the olefin copolymer is less than 5 wt%, the effect of improving the target brittleness is due to the immo content, and the PPS is less than 5 wt%.
If the olefin copolymer exceeds 50 W% by weight, the rigidity and heat resistance, which are characteristics of PPS, will drop significantly, which is not preferable.

The means of blending the composition of the present invention is not particularly limited. pps
It is possible to feed each of the olefin copolymers separately to a melt mixer, or to premix these raw materials in a mortar, Henschel ε mixer, whole mill, ribbon blender, etc. It can also be fed to a melt mixer.

The composition of the present invention may contain antioxidants, heat stabilizers, ultraviolet absorbers, lubricants, mold release agents, colorants such as dyes and pigments, flame retardants, One or more conventional additives such as flame retardant aids, antistatic agents, crystallization promoters, etc. can be added.

Also small amounts of other thermoplastics (e.g. polyethylene,
One or more types of thermosetting resins (eg, phenol resins, epoxy resins, etc.) can be added.

The present invention will be described below with reference to Examples, but these are merely illustrative and the present invention is not limited thereto.

Examples 1 to 3 Polyphenylene sulfide (Philips Petroleum Co., Ltd.'s 'Rydon' PPS F-4) and ethylene-glycidyl methacrylate copolymer (manufactured by Sumitomo Chemical Co., Ltd., Hondofirth pE) were used in the compositions shown in Table 1. Mix and use a -screw extruder (Tanabe Plastics VS-80-28)
After melt-kneading at a temperature of 280°C, the strands were water-cooled and cut to obtain pellets.

Injection molding of the obtained pellets (Dweller-Fustal 47/
28 injection molding machine, cylinder temperature 310°C, mold temperature 130°C), Izotsu impact test piece, bending test piece,
A test piece for measuring heat distortion temperature was obtained.

ASTM D-256, D-790, D-64 respectively
Measured according to 8. Excellent values were obtained in both cases.

Comparative Examples 1-2 The PPS and ethylene-glycidyl methacrylate copolymer used in Examples 1-3 were mixed in the proportions shown in Table 1,
The same processing as in Examples 1 to 8 was performed and the physical properties were measured.

It is significantly inferior to the example.

Table 1 Examples 4-5 Polyphenylene sulfide (Rydon I PPS MR-08 manufactured by Phillips Petroleum) and ethylene-glycidyl methacrylate-vinyl acetate copolymer (
Manufactured by Sumitomo Chemical Co., Ltd., Bondfurth P 2 B) was used as the second
Mix the composition shown in the table and use a twin screw extruder (Ikegai Iron Works P
CM-ao) at a temperature of 290°C, the strands were water-cooled and cut to obtain pellets.

Injection molded Pere Soto (Resident - Nestal 47)
728 injection molding machine, cylinder temperature: 320° C., mold temperature: 130° C.), an Izot impact test piece, a bending test piece, and a test piece for measuring heat distortion temperature were obtained. each ASTM
Measured according to D-256, D-790, D-648. High values were obtained in both cases.

Comparative Examples 3-4 The PPS used in Examples 4-5 and the ethylene-glycidyl methacrylate-vinyl acetate copolymer were mixed in the proportions shown in Table 2, and the same processing as in Examples 4-5 was performed to determine the physical properties. It was measured.

It is significantly inferior to the example.

Claims (1)

[Claims] (c) Polyarylene sulfide 50-99.5W
[% and to] Olefin copolymer consisting of α-olefin and glycidyl ester of α, β-unsaturated acid 50 to Q, 5w
A polyarylene sulfide resin composition comprising E%.