JPH03199263A - Resin composition - Google Patents

Abstract

PURPOSE:To provide a polyethersulfone resin composition depressed in the generation of corrosive gases in the molding processing of the resin to reduce the corrosion of molds and capable of being used for electric and electronic parts by adding an alumina hydrate to a polyether sulfone resin. CONSTITUTION:(A) 100 pts.wt. of a polyether sulfone resin, a linear polymer having arylene bonds, ether bonds and sulfone bonds as essential bond units is compounded with (B) 0.01-20 pts.wt., preferably 0.1-10 pts.wt., of an alumina hydrate (e.g. aluminum hydroxide) and further, if necessary, with a filler such as talc or mica, a fibrous reinforcing agent such as glass fibers or carbon fibers and various additives such as a stabilizer or an UV ray absorbent, followed by dry-blending with a Henschel mixer, etc., and kneating with an extruder, etc., to provide a molding material.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a heat-resistant resin molding material characterized by adding alumina hydrate to a polyethersun resin, and more specifically relates to a molding material. The present invention relates to a polyethersulfone resin composition that can reduce corrosion of molds and the like.

[Conventional technology and its problems]

Polyether sulfone resin has excellent mechanical, thermal, and electrical properties, so it can be molded with various moldability and is widely used in mechanical parts, electrical and electronic parts, etc. . However, the processing temperature of polyether sulfone resin is quite high at 340-400℃, and at such high temperatures some metal corrosive gas is generated, which may corrode the mold and molding machine during the molding process. In addition, when 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 conducted various studies and found that the addition of alkaline hydrate Q to polyether sulfone resin was effective, and completed the present invention. did.

That is, the present invention is a resin m-acid characterized in that 0.01 to 20 parts by weight of alumina hydrate is added to 100 parts by weight of polyether sulfone resin.

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 linear polymer with three essential bonding units: an arylene bond (aromatic bond), an ether bond, and a sulfone bond. For example, the following structure is a very typical example. Can be mentioned.

(1) -(-o-O-s 02-■->-CH) (2) -(-0-■-502-■-〇-〇-C-0
0-)-CH3 (3) -(-0-■-502-■-〇-00-0-
00-) -CH3 (4) -(-0-O-S(h-■-■-〇 -00
-C-00-') -Hs (5) -(-0-■-so, 0-o-■-〇-)-
(6) -(-0-O-SCh-O-O-5O2-■
-0-■-)-(7) -(-0-O-S(h-■-
0-■-CH2-■-)-These polyether sulfones can be easily produced by the methods described in Japanese Patent Publication No. 10067-1980, Japanese Patent Publication No. 7799-1979, and Japanese Patent Publication No. 617-1974.

In addition, the alkaline hydrate used in the present invention is generally [A
Ltoz ・, H, O ], for example, (ALzOi ・JzO), (Atzo
i ・H2O), and furthermore, aluminum hydroxide [AL(OHn, ko) is also included.

The amount of alumina hydrate 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. This is not desirable because it causes problems.

The polyether sulfone resin according to the present invention is usually molded as follows. Polyether sulfone resin and additives are mixed using a mixer such as a Henschel mixer, and then kneaded using a hot roll, extruder, etc. to form a molding material. It is preferable to use this molding material in the form of pellets. Next, the pellets are molded 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, ceramic fibers, stabilizers, ultraviolet absorbers, colorants, fin shaping agents, etc. are added to the resin and [l].
They may be mixed as long as the quality of the acid is not impaired.

〔Example〕

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.

Examples 1 to 4 and Comparative Examples 1 to 3 VICTREX PE as polyether sulfone resin
S3600P (trademark, Imperial Chemical Ind., UK).

Stry Co.) powder and various additives were mixed in the proportions shown in Table 1 and tri-blended using a Henschel mixer. This mixture was processed using a twin-screw extruder at a cylinder temperature of 320~
It was extruded 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.

In addition, the fluidity of each sample was determined based on the melt index (hereinafter referred to as MT) in accordance with JIS K7210.
Furthermore, the cylinder temperature is 33 for the above pellets.
Injection molding was performed at 0 to 360°C. The molded product was crushed, and as shown in Fig. 2, an Erlenmeyer flask was prepared.
Upper AZnO=thJ3i and 3typem? LI performance 1 hill low grade cow Raku ■ ・ ・ 320″
C load...2.16kg Put 10g in Table 2, hang a 5x5mm copper foil inside, and
The copper foil was allowed to stand in a high temperature bath 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 l: Slight discoloration 0: No discoloration It was shown more.

[Effects 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 acid 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 in 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-like bottom-shaped material (sample) obtained from a paraboloid, and each number indicates the following: l: metal can 2: metal can 3: sample 4: W4 material .

FIG. 2 is also a schematic diagram showing a discoloration test of copper foil using a sample, and each number indicates 1: Erlenmeyer flask, 2: silicon stopper, 3: sample, and 4: copper foil.

Claims (2)

[Claims] (1) A polyethersulfone resin composition characterized in that 0.01 to 20 parts by weight of alumina hydrate is added to 100 parts by weight of the polyethersulfone resin. (2) A resin composition, wherein the alumina hydrate according to claim 1 is aluminum hydroxide.