JPH01167366A - Polyether imide resin composition - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to I-lyetherimide resin compositions with improved impact properties.

[Conventional technology]

I-riethelimide is attracting attention as an engineering plastic with excellent heat resistance, flame retardance, rigidity, and chemical resistance for use in electrical parts, automobile parts, and the like.

However, polyetherimide has the disadvantage of low impact resistance.

Therefore, there is a strong demand in various application fields to improve the impact resistance of the resin while maintaining its characteristics such as heat resistance, flame retardance, and rigidity. A method of blending pyrene (Japanese Patent Publication No. 1982-501009), a method of blending an ethylene-vinyl acetate copolymer (Japanese Patent Application Laid-open No. 127360/1982), a method of blending an EPDM terpolymer (Japanese Patent Publication No. 60-50100)
8), a method of blending a rubber-modified vinyl aromatic polymer (%f!L Publication No. 60-501010), a method of blending an ethylene-glycidyl methacrylate copolymer (Japanese Unexamined Patent Publication No. 182847-1987). etc. have been proposed.゛However, the molding temperature of polyetherimide is 330
Blends containing EPDM or rubber-modified vinyl aromatic polymers containing tutadiene, which is extremely high at ~350°C and are susceptible to thermal deterioration, or blends containing ethylene-vinyl acetate copolymers with low heat resistance, cannot be molded. Thermal deterioration progresses during the process, and sufficient improvement effects cannot be obtained.

In addition, blends containing ethylene-glycidyl methacrylate and polyfa-pyrene, which have a high glass transition point,
Impact resistance at low temperatures is insufficient.

[Problem that the invention seeks to solve]

An object of the present invention is to provide a polyetherimide resin composition that has improved impact resistance at room temperature and low temperature while maintaining the characteristics of preetherimide itself such as heat resistance, flame retardance, and rigidity. be.

[Means for solving problems]

In view of the above circumstances, the present inventors have conducted intensive research and found that by blending ethylene-butene-1 copolymer with polyetherimide, the above drawbacks can be improved and a resin composition with excellent impact resistance can be obtained. The inventors have discovered that a product can be obtained, and have arrived at the present invention.

That is, the polyetherimide resin composition of the present invention is
Polyetherimide 50-99% (weight%, same below)
and 50 to 1% of ethylene-butene-1 copolymer.

The present invention will be explained in more detail below.

The polyetherimide used in the present invention is a polymer represented by the general formula.

However, in the above general formula, R is a divalent aromatic organic group having 6 to 30 carbon atoms, and H/ is the above-mentioned R
a divalent organic group selected from the group consisting of alkylene groups having 2 to 20 carbon atoms, cycloalkylene groups and polydiorganoxyloxane groups chain-terminated with alkylene groups having 2 to 8 carbon atoms. be.

Here is a simple example: and so on.

In particular, a typical polyetherimide is a polymer represented by the general formula, and is known by General Electric Company of the United States as "υ".
It is generally commercially available under the trade name LTEM J.

In addition, suitable trade names for the ethylene-butene-1 copolymer used in the present invention include, for example, Mitsui Petrochemical Co., Ltd.
There are Tafu f-A series such as Tahumar A4085, Tahumar A4090, and Tafu f-A20090 manufactured by the company.

The blending ratio of polyetherimide and ethylene-butene-1 copolymer constituting the resin composition of the present invention is preferably 50 to 99 g of polyetherimide and 50 to 1 g of ethylene-butene-1 copolymer. Appropriate.

This is because if the polyetherimide content is more than 99% and the ethylene-butene-1 copolymer content is less than 1%, the desired effect of improving impact resistance will be insufficient, and if the polyetherimide content is less than SOW. This is because if the ethylene-butene-1 copolymer content exceeds 50%, the heat resistance and rigidity, which are characteristics of polyetherimide, will be significantly reduced, which is undesirable.

The blending means for obtaining the resin composition of the present invention is not particularly limited.

For example, polyetherimide and ethylene-butene-1 copolymer may be fed separately to a melt mixer, or they may be preliminarily fed into a mortar, Henschel mixer, etc. -Rumil, what? After pre-mixing using a blender etc.
It may also be fed to a melt mixer.

In addition, one or more kinds of ordinary additives such as antioxidants, ultraviolet absorbers, lubricants, mold release agents, dyes, and pigments may be added to the resin composition K Fi of the present invention without impairing the purpose of the invention. can.

Furthermore, it is also possible to appropriately combine reinforcing agents such as glass fiber, cardan fiber, non-carbon fiber, silicon carbide fiber, and metal fiber, and fillers such as mica, silica, graphite, glass beads, alumina, and calcium carbonate. be.

〔Example〕

Hereinafter, the present invention will be explained in more detail based on Examples, but the present invention is not limited thereto.

Examples 1 to 3 4-riethelimide (ULTEMlooO, trade name, manufactured by General Electric Company) and ethylene-butene-1 copolymer (Tafmer A4085, trade name, Mitsui Petrochemical Co., Ltd.)
Co., Ltd.) in the composition shown in Table 1, and then a -screw extruder (TP-25, 11 product name, manufactured by Thermoglastic Co., Ltd.).
After melt-kneading at a temperature of 320° C., the strands were cooled with water and cut to produce pellets. Next, the pellets were fed into an injection molding machine (M-100, manufactured by Meiki Manufacturing Co., Ltd.) with a cylinder temperature of 340°C and a mold temperature of 80°C, and the Izotsu 9 impact test piece, bending test piece, and thermal deformation temperature were measured. Test specimens were manufactured for ASTM D-256,
Physical properties were measured according to D-790 and D-648. 1st
As is clear from the results in the table, the resin compositions of Examples 1 to 3 not only have excellent heat resistance but also improved impact resistance.

Comparative Examples 1-2 Preetherimide and ethylene used in Examples 1-3
Butene-1 copolymer was mixed with the composition shown in Table 1, processed in the same manner as in Example 1, and the properties were measured.

As is clear from the results in Table 1, the blending ratio of preetherimide and ethylene-butene-1 copolymer deviates from the conditions of the present invention, resulting in insufficient impact resistance or heat resistance. and the decrease in rigidity is significant.

〔Effect of the invention〕

The I-riethelimide resin composition of the present invention has significantly improved impact resistance at room temperature and low temperature while maintaining the heat resistance, rigidity, and other characteristics of the 4-riethelimide itself.

Agent Patent Attorney Sekihei Yamashita

Claims (1)

[Claims] 50-99% by weight of polyetherimide and ethylene-
A polyetherimide resin composition comprising 50 to 1% by weight of a butene-1 copolymer.