Thermoplastic polyester resin composition and molded article thereof
A technology of thermoplastic polyester and resin composition, applied in the field of thermoplastic polyester resin composition and molded products, can solve problems such as reduction of mechanical strength, achieve inhibition of exudation, long-term hydrolysis resistance and heat aging resistance, excellent mechanical physical effect
Active Publication Date: 2021-12-03
TORAY IND INC
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- Description
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- Application Information
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Problems solved by technology
However, thermoplastic polyester resins are prone to decrease in mechanical strength due to thermal oxidation degradation at high temperatures, so in order to be used as industrial materials such as mechanical mechanism parts, electrical / electronic parts, and automobile parts, in addition to general chemical and physical properties In addition to the balance, it is also required to have long-term heat aging resistance at high temperature
Method used
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Embodiment 1～55
[0160] [Examples 1-55], [Comparative Examples 1-20]
[0161] Using a twin-screw extruder with a vented port (manufactured by Nippon Steel Works, TEX-30α) with a screw diameter of 30mm and L / D35 rotating in the same direction, thermoplastic polyester resin (A), epoxy compound (B) , the resin (C) containing a hydroxyl group, and other materials as needed were mixed with the compositions shown in Tables 1 to 9, and added from the main feed section of the twin-screw extruder. In addition, the fiber reinforcement (E) is added by installing a side feeder midway between the main feeder and the ventilator. Melt mixing was carried out under the extrusion conditions of kneading temperature 250°C and screw rotation 200rpm, and the melt mixed resin was discharged in strands, passed through a cooling bath, and pelletized by a strand pelletizer.
[0162] The obtained pellets were dried for 12 hours in a hot air dryer at a temperature of 110°C, and molded and evaluated by the above-mentione...
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Abstract
The present invention is a thermoplastic polyester resin composition comprising a thermoplastic polyester resin (A), an epoxy compound (B) having an epoxy equivalent of 200 to 3,000 g / eq, and a number average molecular weight of 2,000 to 500,000 and A thermoplastic polyester resin composition of a hydroxyl-containing resin (C) having a halogen element content of 1,000 ppm or less, based on 70 to 99.9 parts by weight of the thermoplastic polyester resin (A) and 0.1 to 30 parts by weight of the hydroxyl-containing resin (C) 0.05-10 weight part of epoxy compounds (B) are mix|blended with 100 weight part of total of parts. The present invention provides a thermoplastic resin composition and a molded article capable of simultaneously achieving high levels of long-term hydrolysis resistance and heat aging resistance, and further suppressing bleeding to the surface of the molded article during dry and wet heat treatment.
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, thermoplastic polyester resins are prone to decrease in mechanical strength due to thermal oxidation degradation at high temperatures, so in order to be used as industrial materials such as mechanical mechanism parts, electrical / electronic parts, and automobile parts, in addition to general chemical and physical properties In addition to the balance, it is also required to have long-term heat aging resistance at high temperature. In addition, since thermoplastic polyester resins are easily degraded by hydrolysis, long-term hydrolysis resistance is required for use in the above-menti...
Claims
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IPC IPC(8): C08L67/02C08L63/00C08L101/06
CPCC08L63/00C08L67/02C08L101/06C08G59/245C08G59/32C08G63/183C08K7/14C08L23/0846C08L33/066C08L71/10C08L63/04C08L71/02C08L33/14C08K5/5397C08K5/5313C08K5/5317C08G63/189C08K3/32C08K5/49C08K9/04C08K2003/324C08L2201/08C08L2203/30C08L2205/03
Inventor 奥长健一东城裕介横江牧人梅津秀之
Owner TORAY IND INC