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Thermoplastic polyester resin composition and molded article

A technology of thermoplastic polyester and resin composition, which is applied in the field of thermoplastic polyester resin composition, can solve the problems of insufficient oxidation degradation resistance and mechanical properties, and achieve excellent melt retention stability and excellent oxidation degradation resistance.

Inactive Publication Date: 2019-04-19
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these inventions mainly aim at improving the oxidative degradation resistance of thermoplastic polyamide resins, and also have the problem of insufficient oxidative degradation resistance and mechanical properties.

Method used

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  • Thermoplastic polyester resin composition and molded article
  • Thermoplastic polyester resin composition and molded article

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～8、 comparative example 1～6、10

[0147] Using a screw diameter of 30mm, a ratio of 20% of the kneading area, a twin-screw extruder (manufactured by Nippon Steel Works, TEX-30α) with a vent in the same direction of L / D35, (A-1) was polymerized Butylene phthalate resin, (B) metal halide, and (C) antioxidant were mixed with the compositions shown in Table 1 and Table 2, and added from the main feed section of the twin-screw extruder. Further, melt mixing was carried out under extrusion conditions of a kneading temperature of 250° C. and a screw rotation speed of 150 rpm, and the obtained resin composition was discharged in strands, passed through a cooling bath, and pelletized by a strand pelletizer.

[0148] The obtained pellets were dried in a hot air dryer at a temperature of 110° C. for 12 hours, and then evaluated by the methods described in the above items 1. to 7. Tables 1 and 2 show the results.

Embodiment 9

[0150] Pellets were obtained in the same manner as in Example 2, except that the ratio of the kneading zone was set to 0%, that is, all full range screws. The obtained pellets were dried in a hot air dryer at a temperature of 110° C. for 12 hours, and evaluated by the methods described in the above items 1. to 7. Table 1 shows the results.

Embodiment 10～12

[0152] In the composition shown in Table 1, (A-1) polybutylene terephthalate resin and metal halide (B) were used, and the ratio of the kneading region was set to 55%, except that it was the same as Example 2 Particles were obtained by manipulating. The obtained pellets were dried in a hot air dryer at a temperature of 110° C. for 12 hours, and evaluated by the methods described in the above items 1. to 7. Table 1 shows the results.

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Abstract

The present invention provides a thermoplastic polyester resin composition, comprising 0.01 to 1 part by weight of a metal halide (B) for 100 parts by weight of a thermoplastic polyester resin (A) with a melting point of 180 to 250°C In the composition, the area average particle diameter of the metal halide (B) in the thermoplastic polyester resin composition is 0.1 to 500 nm. The present invention provides a thermoplastic polyester resin composition having excellent melt retention stability and a molded article having excellent mechanical properties and long-term oxidative degradation resistance, and a molded article thereof.

Description

technical field [0001] The present invention relates to a thermoplastic polyester resin composition and a molded article obtained by molding the thermoplastic polyester resin composition. Background technique [0002] Thermoplastic polyester resins are used in a wide range of fields, including machine structural parts, electrical and electronic parts, and automotive parts, due to their excellent injection moldability and mechanical properties. However, thermoplastic polyester resins are prone to decrease in mechanical strength due to oxidative degradation at high temperatures. Therefore, in order to use them as industrial materials such as mechanical structural parts, electrical parts, electronic parts, and automotive parts, other than the balance of general chemical and physical properties In addition, it is also required to improve the oxidation degradation resistance at high temperature for a long period of time. In addition, in recent years, along with miniaturization o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/00C08J3/20C08K3/16C08K5/372
CPCC08J3/20C08J5/04C08J5/043C08J2367/02C08K3/16C08K5/372C08K2201/003C08L67/02
Inventor 须藤健东城裕介歌崎宪一
Owner TORAY IND INC