JPH01282254A - Resin composition - Google Patents

Abstract

PURPOSE:To obtain a resin composition excellent in mechanical and thermal properties and having improved moldability by mixing an alloy polymer of a polyether ketone resin and a polyphenylene sulfide resin with a potassium titanate fiber. CONSTITUTION:100 pts.wt. alloy polymer composed of (A) a polyether ketone resin, a thermoplastic crystalline resin having a repeating unit of formula I or II and (B) a polyphenylene sulfide resin (crosslinked or straight chain structure type) in such a ratio that (B) may occupies 20-80 pts.wt. of the alloy polymer and (C) 2-80 pts.wt. potassium titanate fibre of formula III (n is integral number) produced by the burning method, the smelting method, etc., using K2CO3, KOH, TiO2, etc., as the raw materials are blended, e.g., by mixing a powder of (A) with a powder of (B) using a Henshel type mixer, etc., adding (C) thereto, further mixing and kneading the mixture, thus obtaining the subject resin composition.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a novel resin composition with excellent mechanical and mechanical properties.

[Prior art] Polyetherketone resins and polyphenylene sulfide resins have excellent mechanical, thermal, and electrical properties, so they can be molded using various molding methods to form a single mechanical part. It is widely applied to aviation parts, electrical and electronic parts, etc.

In addition, some alloys with polyphenylene sulfide resin that take advantage of the thermal fatigue resistance properties of polyetherketone resin are being considered. However, the main focus of conventional research has been on the so-called thermal crosslinking process, in which metal is lined (baked) with a powdered or sheet-like alloy composition that may also contain reactive additives. there were.

Recently, alloy resin compositions for molding that take advantage of the respective characteristics of polyether ketone resin and polyphenylene sulfide resin, such as natural Of course.

A method of further improving mechanical strength, heat resistance, etc. by incorporating an MFA reinforcing material is also being considered. However, in general, when fibrous reinforcing materials such as glass fiber and carbon g/mole are blended, although the mechanical properties are significantly improved compared to natural materials, the molding anisotropy is large, the surface smoothness is poor, and the molding machine Since the disadvantages such as abrasion of the mold and the like are noticeable, it is still insufficient to be used as a molding resin composition that can be used for mechanical parts.

[Problems to be Solved by the Invention] An object of the present invention is to improve mechanical properties, chemical properties, etc. of an alloy polymer of polyether ketone resin and polyphenylene sulfide resin without impairing their excellent mechanical properties and chemical properties.
The object of the present invention is to provide a new resin composition with improved surface smoothness and dimensional stability.

[Means for Solving the Problems] In order to achieve the above object, the present inventors conducted various studies, and as a result, they molded an alloy polymer made by adding polyphenylene sulfide resin to polyetherketone resin and blending potassium titanate fibers. It was discovered that when used as a material, a resin composition free from the above-mentioned problems could be obtained, and the present invention was completed.

That is, the resin composition according to the present invention contains 100 parts by weight of an alloy polymer of polyetherketone resin and polyphenylene sulfide resin, and potassium titanate fibers! 112
~80 parts by weight.

The polyetherketone resin used in the present invention is (1)
Alternatively, it is a thermoplastic crystalline resin having a repeating unit represented by formula (2), and is used alone or in combination.

Typical commercially available products include "Pictrex Polyetheretherketone PEEK (trademark)' manufactured by Imperial Chemical Industries Ltd., which corresponds to formula (1), and "Pictrex Polyetheretherketone PEEK (trademark)', which corresponds to formula (2). ``Pictrex Polyetherketone PEK'' manufactured by Imperial Chemical Industries Ltd.
(Trademark)”.

The polyphenylene sulfide resin used in the present invention is a heat-resistant resin represented by the general formula (PtrS)n, and can be either a cross-linked type with a complex branched structure or a linear structure type whose molecular weight is directly increased during the polymerization step. Can be used.

Here, -pb- is -Φ- (φ represents a phenyl group, the same applies hereinafter), -φ-5O2-φ-1-φ-C-φ-, etc., and Q is F, CR, Br, or H3 represents CH3, and Otori represents an integer from 1 to 4.

Typical commercially available products include cross-linked types,
Examples include "Rydon (trademark)" manufactured by Philips Vetroleum Company in the United States, and "Fortron (trademark)" manufactured by Kureha Chemical Industry Co., Ltd. as a linear structure type.

In addition, the potassium titanate fiber used in the present invention is
It is a ceramic whisker represented by the general formula 20·nTiO2 (n is an integer), K2CO3°KO)1. T
Molds are made using i0z etc. as raw materials by firing method, melting method, hydrothermal method, flux method, melting method, etc. (Refer to Plastics Va1.31. No. 8 CIFJ80), etc.)0
A typical example is 2Ti20, which has a layered crystal structure.
s, K2Ti*Og, and those having a tunnel-like crystal structure include 2Ti60+3, K2TiaO+7, and the like.

These resins and potassium titanate in the present invention! l!
The blending amount of potassium titanate fiber is 2 to 80 parts by weight per 100 parts by weight of 70-polymers of polyetherketone resin and polyphenylene sulfide resin. If the amount of potassium titanate fiber is less than 2 parts by weight, the effect of imparting reinforcing properties to the alloy polymer will be insufficient, and if it exceeds 80 parts by weight, the moldability of the resin composition will deteriorate.

Moreover, the alloy polymer referred to here is a multi-component resin for molding in which polyphenylene sulfide resin accounts for 2 to 80 parts by weight of the alloy. If the polyphenylene sulfide resin is less than 2 parts by weight, potassium titanate m!
! Molding processability during compounding is insufficient, and if it exceeds 80 parts by weight, the excellent mechanical properties, thermal properties, etc. of the polyetherketone resin will deteriorate, which is not preferable.

The resin composition according to the present invention is usually produced as follows. After mixing polyetherketone resin powder and polyphenylene sulfide resin powder with a mixer such as a Henschel mixer, potassium titanate fiber is added,
Further, the mixture is mixed using a Henschel mixer, tumbler, etc., and then kneaded using a heated roll, extruder, etc. to form a molding material.

Or resin and potassium titanate l! It is also possible to supply and knead each of the ingredients at the same time, and it is also possible to use master pellets containing potassium titanate FJ1m.

This molding material is preferably used as pellets;
The pellets and the like are molded using a molding machine such as an injection molding machine.

In the present invention, the above-mentioned resin composition may include one dense reinforcing material (e.g., carbon fiber, glass fiber, aramid fiber, metal fiber, etc.), one particulate reinforcing material (e.g., calcium carbonate, clay, etc.), as required.
(talc, silica, glass peas, etc.), as well as fillers such as mica and wollastonite, antioxidants, heat stabilizers, ultraviolet absorbers, colorants, etc., to the extent that they do not impair the quality of the resin composition. Good too.

[Example] The present invention will be explained below with reference to examples.

Examples 1 to 4 As a polyetherketone resin, PEEK" manufactured by ICI Co., Ltd.
450P'' (product name), Fortron KPS''W- manufactured by Kureha Chemical Industry Co., Ltd. as a polyphenylene sulfide resin
214″ (product name), Tismo D manufactured by Otsuka Chemical Co., Ltd. (product name: KzTi6 (h
3) were triblended with the compositions listed in Table 1, and then heated to a cylinder temperature of 320°C using an extruder with a diameter of 4hm.
Extrusion was performed at ~380°C to obtain a uniform pellet-shaped molding material.

Next, this pellet was molded into a test piece using an injection molding machine at a cylinder temperature of 350 to 380°C, and the mechanical properties and thermal properties were measured. The results are shown in Table 1.

Here, tensile strength, bending strength, heat distortion temperature ()In? )
HA Tsure Tsure AST>! [1-838, D-790, [
Measurement was carried out in accordance with 1-848. Further, the above pellets were injection molded into a flat plate measuring 75mm x 75mm x 2am, and the surface smoothness and molding shrinkage rate were measured. Here, the flow direction of the melt is MD (Machine Direction).
tion), and the perpendicular direction is T D (Transver
direction). The results are shown in Table 1.

As seen in Table 1, the resin composition of the present invention has excellent mechanical properties, thermal properties, and surface smoothness, and also has low mold shrinkage and anisotropy, and extremely excellent dimensional stability.

Comparative Examples 1 to 4 Except for changing the composition of the resin m acid as shown in Table 1,
Tests similar to Examples 1 to 4 were conducted. The results are shown in Table 1.

Comparative Example 1, which does not contain any polyphenylene sulfide resin, and Comparative Example 3, which contains a large amount of potassium titanate fibers, have high melt viscosity and therefore have significantly reduced moldability.

Comparative Example 4, in which glass fiber was blended instead of potassium titanate mla, had improved both mechanical properties and thermal properties, but had poor surface smoothness and large anisotropy in molding shrinkage rate.

Example 5 and Comparative Example 5 PEK'K manufactured by ICI as a polyetherketone resin
The same tests as in Example 2 and Comparative Example 2 were conducted except that T-5" (trade name) was used. The results are shown in Table 1.

It can be seen that the resin composition of the present invention has excellent mechanical properties, thermal properties, and moldability.

Margin below [Effects of the Invention] The resin composition according to the present invention has significantly improved mechanical properties, thermal properties, surface smoothness, and dimensional stability, and has high functionality and
Widely used for various mechanical parts that require high precision.

Patent applicant: Mitsui Toatsu Chemical Co., Ltd. Representative Patent Attorney Nobuaki Sakaguchi

Claims (1)

[Scope of Claims] 1. A resin composition comprising 2 to 80 parts by weight of potassium titanate fiber per 100 parts by weight of an alloy polymer of polyetherketone resin and polyphenylene sulfide resin. 2. The resin composition according to claim 1, wherein the polyphenylene sulfide resin accounts for 2 to 80 parts by weight of the alloy polymer.