Polybutylene terephthalate resin composition and injection-molded article

A technology of polybutylene terephthalate and resin composition, which is applied in the field of polybutylene terephthalate resin composition, can solve problems such as difficulties in flame retardancy, and achieve the effect of excellent flame retardancy

Active Publication Date: 2016-03-02
POLYPLASTICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the thinner the thickness of the molded article, the more difficult it is to achieve flame retardancy. Therefore, the current situation is that such a PBT resin composition that can achieve flame retardancy in an extremely thin-walled molded article that can fully exert the effect of improving fluidity has not yet appeared.

Method used

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  • Polybutylene terephthalate resin composition and injection-molded article
  • Polybutylene terephthalate resin composition and injection-molded article
  • Polybutylene terephthalate resin composition and injection-molded article

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～7、 comparative example 1～23

[0094] In each example and comparative example, for (A) polybutylene terephthalate resin (PBT), (B) brominated flame retardant, (C) antimony-based flame retardant aid, (D) talc, (E) Polyhydric hydroxyl compound, (F) anti-dripping agent, (G) glass fiber, respectively mixed the parts shown in Table 1 to Table 3 below, and prepared PBT resin composition by the method described later. Next, the following evaluations were performed using the obtained PBT resin composition.

[0095] In addition, the above-mentioned each component is specifically as follows.

[0096] PBT1 (IV=0.88): manufactured by Win-Tech Polymer Co., Ltd.

[0097] PBT2 (IV=0.69): manufactured by Win-Tech Polymer Co., Ltd.

[0098] PBT3 (IV=0.45): manufactured by Win-Tech Polymer Co., Ltd.

[0099] Flame retardant 1 (brominated epoxy flame retardant (Br-EP)): F3100 manufactured by Buromokemu Far East Co., Ltd., bromine content: about 52% by mass

[0100] Flame retardant 2 (brominated polyacrylate flame retardan...

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Abstract

Provided are a polybutylene terephthalate resin composition having sufficient fluidity to be molded as thin-walled during molding and having excellent flame retardancy even when molded as thin-walled, and an injection-molded article obtained using this resin composition. A polybutylene terephthalate resin composition containing 20 to 65 total parts by mass of (B) brominated epoxy flame retardant and/or brominated acrylate flame retardant, 10 to 30 parts by mass of (C) antimony flame retardant auxiliary, 3 to 15 parts by mass of (D) talc, and 1 to 10 parts by mass of (E) polyvalent hydroxyl group-containing compound having a hydroxyl value of 100 or higher per 100 parts by mass of (A) polybutylene terephthalate resin having an intrinsic viscosity of 0.70 to 1.00 g/dL; and an injection-molded article having a 0.2 to 0.5-mm-thick thin-walled portion in at least one portion obtained by injection-molding this resin composition.

Description

technical field [0001] The present invention relates to a polybutylene terephthalate resin composition, and more specifically, to a polybutylene terephthalate resin composition excellent in flame retardancy and fluidity during molding of thin-walled molded articles, and an injection molded polybutylene terephthalate resin composition. moldings. Background technique [0002] Polybutylene terephthalate (hereinafter also referred to as "PBT") resin has excellent mechanical properties, electrical properties, etc., and therefore is widely used as a material for various molded products, especially in the field of electric / electronic parts. [0003] Resin compositions used for such molded articles are generally required to have high flame retardancy, and therefore various studies have been made to improve the flame retardancy of PBT resins (for example, see Patent Documents 1 to 3). In addition, in recent years, the thickness of molded products tends to be thinner due to the deman...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02B29C45/00C08K3/22C08K3/34C08K5/103C08L63/00B29K67/00
CPCC08L67/02B29C45/0001B29K2067/006B29K2105/0026C08G59/308C08G59/62C08K3/2279C08K3/346C08K5/103C08L101/04C08L63/00
Inventor 丸山幸祐坂田耕一
Owner POLYPLASTICS CO LTD
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