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Reinforced thermoplastic polyester resin composition

A resin composition and thermoplastic polyester technology are applied in the field of reinforced polyester resin compositions to achieve the effects of excellent design, improved appearance and good mirror appearance

Active Publication Date: 2021-11-12
TOYOBO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are materials with a flexural modulus exceeding 20 GPa as proposed in Patent Document 6, polyester materials with ultra-high rigidity and good appearance exceeding 30 GPa have not been proposed so far.

Method used

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  • Reinforced thermoplastic polyester resin composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～9、 comparative example 1～8

[0120] The reinforced polyester resin compositions of Examples and Comparative Examples are to weigh the above-mentioned raw materials according to the mixing ratio (parts by mass) shown in Table 1, and use A twin-screw extruder (manufactured by Toshiba Machine Co., Ltd.) melt-kneaded at a cylinder temperature of 270° C. and a screw rotation speed of 200 rpm. Raw materials other than reinforcement materials are fed into the twin-screw extruder from the hopper, and reinforcement materials are fed into the twin-screw extruder from the exhaust port by side feeding (when two or more types of reinforcement materials are used, they are fed from the side feed port respectively). The obtained reinforced polyester resin composition pellets were dried, and molded into various evaluation samples with an injection molding machine. The evaluation results are shown in Table 1.

[0121]

[0122] As is clear from Table 1, in Examples 1 to 9, while having high rigidity with a flexural mod...

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Abstract

The present invention relates to a reinforced thermoplastic polyester resin composition containing (A) 20-35 parts by mass of a polybutylene terephthalate resin; (B) 1-10 parts by mass of a polyethylene terephthalate resin; (C) 1-10 parts by mass of a copolymerized polybutylene terephthalate resin; (D) 5-12 parts by mass of a copolymerized polyethylene terephthalate resin; (E) 1-6 parts by mass of a polycarbonate-based resin; (F) 45-60 parts by mass of a fiber-based reinforcement material; and (G) 0.05-2 parts by mass of a transesterification inhibitor, wherein the total amount of components (A), (B), (C), (D), (E), and (F) is 100 parts by mass. By using the reinforced thermoplastic polyester resin composition, a molded article having an embossed appearance free of unevenness and having few appearance defects such as floating of a reinforcement material can be stably obtained under various molding conditions while having high rigidity (bending modulus of greater than 30 GPa) and high strength.

Description

technical field [0001] The present invention relates to a reinforced polyester resin composition containing thermoplastic polyester resin and fiber reinforcement. Specifically, it relates to a reinforced polyester resin composition capable of obtaining a uniform textured appearance and a mirror-like appearance without wrinkles due to high rigidity and high strength while having few appearance defects due to floating of a fiber reinforcement material of a molded product, etc. moldings. Background technique [0002] In general, polyester resins are widely used in automotive parts, electric and / or electronic parts, household miscellaneous goods, and the like because of excellent mechanical properties, heat resistance, chemical resistance, and the like. Among them, it is known that the rigidity, strength, and heat resistance of polyester resin compositions reinforced with inorganic reinforcing materials such as glass fibers are greatly improved, and in particular, rigidity decr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K7/02C08L67/02C08L69/00C08J5/04
CPCC08L67/02C08J5/042C08J5/043C08J2367/02C08J2469/00C08L69/00C08K7/02C08K7/06C08K7/14C08K3/04C08J5/047C08L2205/025C08L2205/04C08L2205/035
Inventor 清水隆浩下拂卓也
Owner TOYOBO CO LTD
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