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A low-smoke density halogen-containing flame-retardant reinforced PBT/PET compound and its preparation method and application

A smoke density and compound technology, which is applied in the field of engineering plastics, can solve the problems of not paying attention to the amount of smoke or smoke density index, and the smoke density cannot be satisfied, and achieve the effect of high appearance gloss.

Active Publication Date: 2022-03-22
KINGFA SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN111534060A discloses a reinforced flame-retardant PBT / PET alloy, which includes PBT, PET, glass fiber, brominated flame retardant and other components, and the obtained reinforced flame-retardant PBT / PET The alloy has good heat resistance and flame retardancy, but no attention has been paid to its smoke generation or smoke density index
Chinese patent application CN 102532826 A discloses a low-cost flame-retardant glass fiber-reinforced PBT engineering plastic. The flame-retardant glass fiber-reinforced PBT engineering plastic utilizes the smoke suppression effect of silicate to obtain a low-cost flame-retardant glass fiber-reinforced PBT Engineering plastics have good flame retardancy, but their smoke density cannot meet the level 3 standard of EN45545-2

Method used

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  • A low-smoke density halogen-containing flame-retardant reinforced PBT/PET compound and its preparation method and application
  • A low-smoke density halogen-containing flame-retardant reinforced PBT/PET compound and its preparation method and application
  • A low-smoke density halogen-containing flame-retardant reinforced PBT/PET compound and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～18

[0058] The content of each component in the PBT / PET composites of Examples 1-18 is shown in Table 1.

[0059] The preparation method is as follows: according to Table 1, the brominated flame retardant and the synergistic flame retardant are mixed to make the first premix; the epoxy resin is mixed with boehmite, kaolin, and magnesium stearate to make the second premix. Mixture; PBT, PET, glass fiber, the first premix, and the second premix are added to the twin-screw extruder, mixed and dispersed, melt-extruded and granulated to obtain low-smoke density halogen-containing flame-retardant reinforced PBT / PET compound.

[0060] Among them, the temperature of the first zone of the twin-screw extruder from the feeding port to the machine head is 200-230°C, the temperature of the second zone is 240-260°C, the temperature of the third zone is 235-255°C, and the temperature of the fourth zone is 235-255°C , the temperature in zone five is 235-255°C, the temperature in zone six is ​​2...

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Abstract

The invention discloses a low-smoke density halogen-containing flame-retardant reinforced PBT / PET composite, a preparation method and application thereof. The low-smoke density halogen-containing flame-retardant reinforced PBT / PET compound includes the following components: PBT, PET, glass fiber, brominated flame retardant, synergistic flame retardant, epoxy resin, boehmite, kaolin, hard Magnesium stearate; the weight ratio of PBT to PET is (1-4): 1, and the particle diameter D50 of the magnesium stearate is ≤5 μm. Through the compounding of PET and PBT in an appropriate proportion, and the synergistic effect of boehmite, kaolin and magnesium stearate with a specific particle size, the smoke density of the PBT / PET compound reaches the smoke density required by the EN45545‑2 standard3 Grade, smoke density Ds max≤150, and the appearance of PET / PET products made of this PBT / PET compound has high gloss.

Description

technical field [0001] The invention relates to the technical field of engineering plastics, and more specifically, to a low-smoke density halogen-containing flame-retardant reinforced PBT / PET compound and a preparation method and application thereof. Background technique [0002] Plastic materials are generally accompanied by a large amount of smoke during the combustion process, which will cause environmental pollution and cause great harm to the human body. In recent years, with the development of plastic flame retardant technology, low-smoke flame retardant has become a new direction for the development of flame retardant plastics. Rail transit, building materials, cables and other industries have increasingly clear and standardized requirements for low-smoke flame retardancy. Such industries have clearly required that plastic parts in applications must meet the smoke density level 2 or above required by the EN45545-2 standard (Level 2 requires ISO5659-2 test smoke dens...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/02C08L63/00C08L25/06C08L69/00C08K13/06C08K9/06C08K7/14C08K3/34C08K5/098C08K3/22C08J5/04
CPCC08J5/043C08J2367/02C08J2467/02C08J2463/00C08J2425/06C08J2469/00C08K13/06C08K9/06C08K7/14C08K3/346C08K5/098C08K2003/2227C08K3/2279
Inventor 陈伟黄险波叶南飚冯健陈锐付学俊
Owner KINGFA SCI & TECH CO LTD
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