JPH03199262A - Resin composition - Google Patents

Abstract

PURPOSE:To provide a resin composition depressed in the generation of corrosive gases to reduce the corrosion of molds, etc., and suitable for electric and electronic parts by adding a hydrotalcite compound to a polyethersulfone resin. CONSTITUTION:(A) 100 pts.wt. of a polyethersulfone resin is compounded with (B) 0.001-20 pts.wt., preferably 0.1-10 pts.wt., of a hydrotalcite compound and further, if necessary, with a filler such as talc or mica, a fibrous reinforcing material such as glass fibers or carbon fibers, a stabilizer, an UV ray absorbent, etc.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a heat-resistant resin molding material characterized by adding a hydrotalcite compound to a polyethersun resin. The present invention relates to a polyether sulfone resin & IIt2 product that can reduce corrosion of molds, etc. during molding.

[Conventional technology and its problems]

Polyether sulfone resin has excellent properties such as mechanical properties, thermal properties, and electrical properties, so it can be molded with various moldability and is widely used for 8g mechanical parts, electrical and electronic parts, etc. There is. However, the processing temperature of polyether sulfone resin is quite high at 340 to 400°C, and at such high temperatures some metal corrosive gas is generated, which may corrode the mold and molding machine during the molding process. Alternatively, if a molded product is aged at a temperature of 100° C. or higher, a problem arises in that corrosive gas is generated and metal parts are corroded. Particularly when used in the electrical and electronic fields, the reliability of electronic components is reduced due to the generation of corrosive gases such as sulfur dioxide gas.

In the past, attempts have been made to add zinc oxide, etc. to prevent the negative effects of corrosive gases generated from resins, but as sufficient effects cannot be obtained, their use as molding materials and molded products is limited. situation.

[Means for solving problems]

In order to prevent the adverse effects of corrosive gases on molded products, the inventors of the present invention have conducted various studies and found that it is effective to add a hydrotalcite compound to polyethersulfone resin, and have completed the present invention. Intimidated.

That is, in the present invention, 0.01 to 2 parts of hydrotalcite compound is added to 100 parts by weight of polyether sulfone resin.
This is a resin composition characterized by adding 0 parts by weight. The polyether sulfone resin used in the present invention is a type obtained by a condensation reaction between an alkali ferulate group and an aromatic halogen group activated with an electron-withdrawing sulfone group in an aprotic polar solvent. It is a polymer with the following structure in which three essential bonding units are an arylene bond (aromatic bond), an ether bond, and a sulfone bond.

(1) -(-o-O-302-■-)-Hs (2) -(-o-O-so2-■-0-o-C-■
-)-Hs (3) -(-o-O-sot-■-〇-■-〇-■
-) -Hi (4) -(-0-■-502-■-■-〇-■-C
-00-)H3 (5) -(-0-O-3o2-■-〇 -00-0
0-) -(6) -(-0-O-3(h-o-o-
5(h-■-0-■-)-(7) -(-0-O-S
Oz-■-0-O-CHz-■-) can be manufactured.

In addition, the hydrotalcite compound used in the present invention refers to hydrotalcite (chemical structure [
M g b A I z (OH) 1- COl・4
H! O]), and synthetic products with similar structures (chemical structure [M g a, sA l z (OH) 13c Ox
・3.5H,Ol: Kyowa Chemical Industry Co., Ltd.), and is usually used in powder form. The amount of the hydrotalcite compound added in the present invention is 0.01 to 20 parts by weight, preferably 0.1 to 10 parts by weight, per 100 parts by weight of the polyethersulfone resin. If the amount added is too small, there will be almost no effect of reducing corrosive gases.On the other hand, if it is used in excess of 20 parts by weight, the effect of reducing corrosive gases will be sufficient, but the fluidity will decrease and the moldability will be affected. The polyether sulfone resin according to the present invention is usually shaped as follows. The polyether sulfone resin and additives are mixed with a mixer such as a Henschel mixer, and then kneaded with a hot roll, extruder, etc. to form a molding material. This molding material is preferably used in the form of pellets.The pellets are then formed into a bottom shape using a molding machine such as an injection molding machine.

In the present invention, fillers such as talc, mica, and glass beads may be added to the polyether sulfone resin molding material as necessary.
Various additives such as glass fibers, carbon fibers, potassium titanate fibers, aramid fibers, cera vine fibers, etc., stabilizers, ultraviolet absorbers, colorants, and mold release agents are added to the quality of the resin composition. may be mixed as long as it does not impair the

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

〔Example〕

Examples 1 to 4 and Comparative Examples 1 to 3 VICTREX PE as polyether sulfone resin
53600P (trademark, Imperial Chemical Industries Limited, UK) powder and various additives were blended in the proportions shown in Table 1, and triblended using a Henschel mixer.

This mixture was extruded using a twin-screw extruder at a cylinder temperature of 320°C.
Extrusion was performed at ~350°C to obtain a uniform pellet-shaped molding material.

10 g of the pellets were placed in a glass container together with a steel material as shown in FIG. 1, heated at 380° C. for 24 hours, and the degree of discoloration of the steel material was observed.

Further, the fluidity of each sample was determined based on the melt index (hereinafter referred to as Ml value) in accordance with JIS K7210.
Furthermore, the cylinder temperature is 33 for the above pellets.
Injection molding was performed at 0-360°C. Precept Table 1 Hydrotalcite...Kyowa Chemical Industries ZnO...
・ttle
...2.16kg Table 2 Crush the parts and place them in an Erlenmeyer flask as shown in Figure 2.
A 5×5 mmO copper foil was suspended inside the copper foil and left to stand in a high temperature bath at 150° C. for 100 hours, and the degree of discoloration of the copper foil was observed, and the results shown in Table 2 were obtained.

The criteria for discoloration shown in Tables 1 and 2 are 3: Severe discoloration. 2: Significant discoloration 1: Slight discoloration 0: No discoloration More shown.

〔Effect of the invention〕

The polyether sulfone resin molding material according to the present invention is effective in preventing the adverse effects caused by the generation of corrosive gases.
It is possible to reduce maintenance costs for bottom molds and molding machines during injection molding and extrusion molding. In addition, various molded products molded with the polyether sulfone resin of the present invention can be used for electrical and electronic parts because the generation of corrosive gases is suppressed. It is a schematic diagram showing a discoloration test of steel materials using a pellet-shaped molding material (sample) obtained from a commercially available material, and each number represents 1: metal can, 2: metal can, 3: sample 4: steel material.

FIG. 2 is also a schematic diagram showing a discoloration test of copper foil using samples, and each number indicates 1: Erlenmeyer flask, 2: Silicon stopper, 3: Sample 11i1 foil.

Claims (1)

[Claims] A polyethersulfone resin composition characterized in that 0.01 to 20 parts by weight of a hydrotalcite compound is added to 100 parts by weight of the polyethersulfone resin.