Thermoplastic polyester resin composition and molded article

A thermoplastic polyester and resin composition technology, applied in the field of molded products and thermoplastic polyester resin compositions, can solve the problems of insufficient hydrolysis resistance and insufficient retention stability, and achieve excellent retention stability and excellent resistance to oxidative deterioration. , the effect of excellent mechanical properties and heat resistance

Active Publication Date: 2019-03-29
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this is an invention mainly aimed at improving moldability, and the resin composition described in Patent Document 3 has problems of insufficient hydrolysis resistance and retention stability.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～42

[0213] [Examples 1-42], [Comparative Examples 1-5]

[0214] (A) thermoplastic polyester resin, (B) or (B ') novolac type epoxy resin, (C) epoxy compound with 2 epoxy functional groups per molecule, (D) reducing phosphorus compound added as needed, (E) phosphorus stabilizer, (G ) reaction accelerator and other materials were mixed with the composition shown in Table 1 to Table 6, and added from the main feed section of the twin-screw extruder. In addition, (F) fiber reinforcement is added by the side feeder installed in the middle of the main feed part and the exhaust part. Further, melt mixing was carried out under extrusion conditions of a kneading temperature of 260° C. and a screw rotation speed of 150 rpm, discharged into strands, passed through a cooling bath, and pelletized by a strand pelletizer.

[0215] The obtained pellets were dried with a hot air dryer at a temperature of 110° C. for 6 hours, and then evaluated by the above method. Tables 1 to 6 show the results....

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Abstract

A thermoplastic polyester resin composition, wherein, with respect to 100 parts by weight of thermoplastic polyester resin, (B) 0.1 to 5 parts by weight of a novolak-type epoxy resin having a specific structure and (C) rings per molecule 0.05-10 parts by weight of an epoxy compound having two oxygen functional groups. It has excellent retention stability against a wide range of processing temperatures, and can obtain molded articles having excellent mechanical properties and heat resistance, long-term hydrolysis resistance, chemical resistance, and oxidative degradation resistance.

Description

technical field [0001] The present invention relates to a thermoplastic polyester resin composition and a molded article obtained by molding it. Background technique [0002] Thermoplastic polyester resins are used in a wide range of fields, including machine parts, electrical / electronic parts, and automotive parts, due to their excellent injection moldability and mechanical properties. However, since thermoplastic polyester resins are easily degraded by hydrolysis, in order to be used as industrial materials such as mechanical mechanism parts, electrical parts, electronic parts, and automobile parts, in addition to a general balance of chemical and physical properties, long-term resistance to hydrolysis. In addition, in recent years, along with the downsizing of molded products, the demand for thinner wall and lighter weight has increased. Especially in the application of thin-walled molded products such as connectors, when the viscosity change during melt retention is la...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/00C08K5/49C08L63/00
CPCC08L67/00C08L63/00C08L63/04C08L67/02C08K5/524C08K5/5313C08K7/14C08K5/49C08K7/02C08K3/32B29B9/065B29K2067/006B29K2105/0044C08L2201/08
Inventor 东城裕介横江牧人梅津秀之
Owner TORAY IND INC
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