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High-GWIT flame-retardant reinforced PBT material and preparation method thereof

A technology of PBT resin and raw materials, applied in the field of high GWIT flame retardant reinforced PBT materials and their preparation, can solve the problems of poor dimensional stability, easy warpage, and limit flame retardant PBT, and achieves reduction of crystallinity and improvement of easy deformation. Effect

Pending Publication Date: 2021-04-30
上海聚威新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The flame-retardant modified PBT material has excellent flame-retardant properties, and its glow-wire index (GWFI) can reach 960°C, but the glow-wire ignition temperature (GWIT) is lower than 800°C, because of its high crystallinity The characteristics lead to poor dimensional stability, and it is easy to warp after glass fiber reinforcement, thus limiting the application of flame-retardant PBT in some high-end fields and high-performance requirements

Method used

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  • High-GWIT flame-retardant reinforced PBT material and preparation method thereof

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Comparison scheme
Effect test

Embodiment 1

[0024] A preparation method of a flame-retardant reinforced PBT material with high GWIT, specifically comprising the following steps:

[0025] (1) Take by weight 60 parts of raw material PBT resin, 5 parts of styrene-acrylonitrile copolymer, 15 parts of brominated polystyrene, 3 parts of antimony trioxide, 7 parts of magnesium hydroxide, glass chopped fiber 10 copies;

[0026] (2) Add PBT resin, styrene-acrylonitrile copolymer, brominated polystyrene, antimony trioxide and magnesium hydroxide into the high-mixer and mix evenly, then feed into the twin-screw extruder through the main feed, glass Chopped fibers are fed into the twin-screw extruder through side feeding, and then the raw materials are melted and plasticized under the condition of 220-260°C in the twin-screw extruder, and then extruded and pelletized to obtain a high GWIT flame retardant reinforcement PBT material.

Embodiment 2

[0028] A preparation method of a flame-retardant reinforced PBT material with high GWIT, specifically comprising the following steps:

[0029] (1) Take by weight 46 parts of raw material PBT resin, 6 parts of styrene-acrylonitrile copolymer, 13 parts of brominated polystyrene, 5 parts of antimony trioxide, 10 parts of magnesium hydroxide, glass chopped fiber 20 copies;

[0030] (2) Add PBT resin, styrene-acrylonitrile copolymer, brominated polystyrene, antimony trioxide and magnesium hydroxide into the high-mixer and mix evenly, then feed into the twin-screw extruder through the main feed, glass Chopped fibers are fed into the twin-screw extruder through side feeding, and then the raw materials are melted and plasticized under the condition of 220-260°C in the twin-screw extruder, and then extruded and pelletized to obtain a high GWIT flame retardant reinforcement PBT material.

Embodiment 3

[0032] A preparation method of a flame-retardant reinforced PBT material with high GWIT, specifically comprising the following steps:

[0033] (1) Take by weight 50 parts of raw material PBT resin, 7 parts of styrene-acrylonitrile copolymer, 10 parts of brominated polystyrene, 2 parts of antimony trioxide, 6 parts of magnesium hydroxide, glass chopped fiber 25 copies;

[0034] (2) Add PBT resin, styrene-acrylonitrile copolymer, brominated polystyrene, antimony trioxide and magnesium hydroxide into the high-mixer and mix evenly, then feed into the twin-screw extruder through the main feed, glass Chopped fibers are fed into the twin-screw extruder through side feeding, and then the raw materials are melted and plasticized under the condition of 220-260°C in the twin-screw extruder, and then extruded and pelletized to obtain a high GWIT flame retardant reinforcement PBT material.

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Abstract

The invention discloses a flame-retardant reinforced PBT material with high GWIT. The flame-retardant reinforced PBT material comprises the following raw materials: PBT resin, a styrene-acrylonitrile copolymer, glass fibers, a brominated flame retardant and an auxiliary flame retardant. Magnesium hydroxide and antimony trioxide are compounded to serve as auxiliary flame retardance, the ignition point of the material is delayed, and therefore the GWIT temperature is increased, and the material is quite suitable for the fields of electronic components, electrical equipment, new energy automobiles and the like.

Description

technical field [0001] The invention belongs to the technical field of polymer material modification, and in particular relates to a flame-retardant reinforced PBT material with high GWIT and a preparation method thereof. Background technique [0002] Polybutylene terephthalate (PBT) is a common polymer material and one of the five major engineering plastics. PBT material has the characteristics of fast crystallization, easy molding, chemical resistance and solvent resistance, and has very good electrical properties, high insulation, excellent arc resistance, but poor mechanical properties and flame retardancy; after glass fiber reinforcement Finally, PBT material has excellent rigidity. Based on the characteristics of low hygroscopicity, its mechanical properties will not change significantly under high humidity conditions, so it can replace nylon materials in the field of electronic appliances. The flame-retardant modified PBT material has excellent flame-retardant proper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L25/12C08L25/06C08K13/06C08K9/04C08K7/14C08K3/22C08J5/08
CPCC08J5/08C08J2367/02C08J2425/12C08J2425/06C08K13/06C08K9/04C08K7/14C08K3/2279C08K2003/2224
Inventor 王晶张天荣杨俊王凯王明义王帅张如心
Owner 上海聚威新材料股份有限公司