Flame-retardant polybutylene terephthalate resin composition, and molded product thereof

Abstract

Provided are: a flame-retardant polybutylene terephthalate resin composition which exhibits excellent flame retardancy, glow-wire properties (GWIT), tracking resistance and bleed resistance in spite of a fact that a polybutylene terephthalate resin is used as a sole resin component; and a molded product of the resin composition. A flame-retardant resin composition comprising (A) a polybutylene terephthalate resin, (B) a phosphinic acid salt, (C) a phosphazene compound and (D) a nitrogenated cyclic compound, said resin composition being characterized in that the level of the flame retardancy as measured in accordance with a UL94 combustion test is V-0, the glow-wire ignition temperature (GWIT) as measured in accordance with IEC60695-2-13 standard is 775˚C or higher, the comparative tracking index (CTI) as measured in accordance with IEC60112 standard is 400 V or more, and bleed out does not occur when the resin composition is treated at 110˚C for 20 hours.

Description

technical field [0001] The present invention relates to a flame-retardant polybutylene terephthalate resin composition using a polybutylene terephthalate resin as a base resin, and a combination of the flame-retardant polybutylene terephthalate resin A molded product formed from an object. Background technique [0002] Polybutylene terephthalate resin (hereinafter, also referred to as "PBT resin".) has a high heat distortion temperature and is excellent in electrical properties, mechanical properties, weather resistance, chemical resistance, and the like, and is therefore used in electrical Various applications such as electronic parts and automobile parts. In such applications, flame retardancy is an important property, and various studies have been conducted to impart flame retardancy to PBT resins. Furthermore, conventionally, a method of imparting flame retardancy by adding a halogen-based flame retardant to PBT resin has been adopted. However, if the halogen-based fl...

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Problems solved by technology

However, the flame retardancy of nitrogen-containing cyclic compounds is not so high. In order to improve the flame retardancy, other flame retardants need to be used in combination

[0005] Based on the above reasons, it is conceivable that the properties required for the flame retardant resin composition used for the above parts can be achieved by using a phosphazene compound, a phosphinate, and a nitrogen-containing cyclic compound in combination. The resin composition of the fuel is unknown

[0006] In addition, when using more than a certain amount of phosphazene compound, it is necessary to achieve bleeding prevention, and if other resins are alloyed with the base resin as described above, some types of resins used may affect various characteristics

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