JP2683437B2 - Resin composition - Google Patents

Description

TECHNICAL FIELD The present invention relates to a heat-resistant resin molding material characterized by adding an alumina hydrate to a polyether sulfone resin, and more specifically to a molding process. The present invention relates to a polyether sulfone resin composition capable of reducing corrosion of a mold or the like at the time.

[Conventional technology and its problems]

Polyethersulfone resin has mechanical properties, thermal properties,
Since it has excellent properties such as electrical properties, it is molded by various molding methods and widely used for mechanical parts, electric and electronic parts, and the like. However, the processing temperature of polyethersulfone resin is a fairly high temperature of 340-400 ° C, and a slight amount of metal corrosive gas is generated under such high temperature. Alternatively, if the molded product is aged at 100 ° C. or higher, a corrosive gas is generated and the metal part is corroded. In particular, when used in the field of electric and electronic equipment, the generation of corrosive gas such as sulfurous acid gas results in a decrease in the reliability of electronic components.

Conventionally, in order to prevent adverse effects due to generation of corrosive gas from resin, addition of zinc oxide or the like has been attempted, but since sufficient effects cannot be obtained, applications as molding materials and molded articles are limited. In the situation.

[Means for solving the problem]

Here, as a result of various studies, the present inventors have found that the addition of alumina hydrate to the polyethersulfone resin is effective, and completed the present invention.

That is, the present invention is based on 100 parts by weight of a polyether sulfone resin selected from structural units represented by the following formulas (1) to (7), A1 ₂ O ₃ .3H ₂ O, A1 ₂ O ₃ .H ₂ O, or A1 (O
H) ₃ or more alumina hydrate represented by the chemical formula of ₃ 0.1 parts by weight or more,
A polyethersulfone resin composition, which is obtained by adding an amount not exceeding 10 parts by weight.

The polyether sulfone resin used in the present invention,
An alkali phenolate group, an aromatic halogen group activated with an electron-withdrawing sulfone group, and a polymer obtained by a condensation reaction in an aprotic polar solvent, wherein the arylene bond (aromatic bond), It is a linear polymer having an ether bond and a sulfone bond as essential bonding units. For example, a very typical example is one having the following structure.

These polyether sulfone resins are, for example,
It can be easily produced by the method described in JP-B-40-10067, JP-B-42-7799 and JP-B-47-617.

The alumina hydrate used in the present invention is generally a compound having a chemical composition of [AL ₂ O ₃ · nH ₂ O], such as (AL ₂ O ₃ · ₃ H ₂ O), (AL ₂ O ₃ · H ₂ O) and aluminum hydroxide [AL (OH) ₃ ] is also included in this.

The amount of the alumina hydrate added in the present invention is 0.01 to 20 parts by weight, preferably 0.1 to 10 parts by weight, based on 100 parts by weight of the polyether sulfone resin. If the amount added is too small, the effect of reducing corrosive gas is scarcely seen, and conversely, when used in excess of 20 parts by weight, the effect of reducing corrosive gas is sufficient, but the fluidity decreases and moldability becomes poor. It is not preferable because it causes problems.

The polyethersulfone resin according to the present invention is usually molded as follows. The polyethersulfone resin and the additive are mixed by a mixer such as a Henschel mixer, and further kneaded by a hot roll, an extruder or the like to form a molding material. This molding material is preferably used as pellets. Next, the pellets and the like are formed by a molding machine such as an injection molding machine.

In the present invention, if necessary for the polyether sulfone resin molding material, filler such as talc, mica, crow beads, glass fiber, carbon fiber, potassium titanate fiber, aramid fiber, fibrous reinforcing material such as ceramic fiber, Stabilizer,
Various additives such as an ultraviolet absorber, a coloring agent, and a release agent may be mixed as long as the quality of the resin composition is not impaired.

〔Example〕

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

Examples 1-4 and Comparative Examples 1-3 VICTREX PES3600P as a polyether sulfone resin
(Trademark, Imperial Chemical Industry, UK)
The powder and various additives were blended in the proportions shown in Table 1 and dry blended with a Henschel mixer. This mixture is extruded using a twin-screw extruder at a cylinder temperature of 320 to 350 ° C,
A uniform pellet-like molding material was obtained.

As shown in FIG. 1, 10 g of the pellet was put in a glass container together with a steel material, and heated at 380 ° C. for 24 hours to observe the degree of discoloration of the steel material.

The fluidity of each sample was determined from the melt index (hereinafter, MI value) in accordance with JIS K7210. Further, the above pellets were subjected to injection molding at a cylinder temperature of 330 to 360 ° C. The molded product was crushed and, as shown in FIG. 2, an Erlenmeyer flask. Put 10g in a cup, hang a 5 x 5mm copper foil in it, and let it stand in a high temperature tank at 150 ° C for 100 hours to observe the degree of discoloration of the copper foil.
I got a result like.

 The criteria for the discoloration shown in Tables 1 and 2 are as follows: 3: large discoloration 2: considerable discoloration 1: slight discoloration 0: no discoloration

〔The invention's effect〕

Polyether sulfone resin molding material according to the present invention,
Since it is effective in preventing adverse effects due to the generation of corrosive gas, it is possible to reduce the maintenance cost of the molding die and the molding machine at the time of injection molding and extrusion molding. In addition, various molded articles molded with the polyethersulfone resin of the present invention can be used for electric and electronic parts because generation of corrosive gas is suppressed, and the present invention is significant.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a discoloration test of a steel material using a pellet-shaped molding material (sample) obtained from a polyethersulfone resin composition, where the numbers are respectively 1: metal can, 2: metal can,
3: Sample, 4: Steel material is shown. FIG. 2 is also a schematic diagram showing a discoloration test of a copper foil by a sample, where each number is 1: Erlenmeyer flask, 2: Silicon stopper,
3: Sample, 4: Copper foil is shown.

Claims (1)

(57) [Claims] 1. A1 ₂ O ₃ .3H ₂ O, A1 ₂ O ₃ .H based on 100 parts by weight of a polyether sulfone resin selected from structural units represented by the following formulas (1) to (7). A polyether sulfone resin composition obtained by adding an amount of 0.1 parts by weight or more and not more than 10 parts by weight of an alumina hydrate represented by the chemical formula of ₂ O or A1 (OH) ₃ .