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Flame-retardant PBT composite material and preparation method thereof

A technology of composite materials and mixtures, which is applied in the field of flame retardant materials, can solve the problems of limiting the application of PBT, poor corona resistance, poor physical properties and flame retardant properties, etc., to achieve excellent mechanical properties, improve mechanical properties, and complete crystallization Effect

Inactive Publication Date: 2016-01-06
ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Polybutylene terephthalate (PBT) is an engineering plastic with excellent comprehensive properties. It has excellent physical and mechanical properties in a wide temperature range. The long-term use temperature can reach 120 ° C. At high temperature and high frequency, the electrical properties are still good, but the corona resistance is poor, and the physical properties and flame retardancy at high temperature are not good, which greatly limits the application of PBT

Method used

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  • Flame-retardant PBT composite material and preparation method thereof
  • Flame-retardant PBT composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] (1) Weighing parts by weight are 70 parts of PBT, 10 parts of MOS treated with coupling agent, and 1 part of SiO 2 , 0.1 part of Irganox168 and 0.1 part of Irganox1010 were mixed and stirred evenly to obtain a mixture;

[0033] (2) Put the mixture obtained in the step (1) into the hopper of the twin-screw extruder and extrude and granulate to obtain the flame-retardant PBT composite material P1, wherein the first temperature zone of the twin-screw extruder The temperature is 170°C, the temperature in the second temperature zone is 230°C, the temperature in the third temperature zone is 230°C, the temperature in the fourth temperature zone is 230°C, the temperature in the fifth temperature zone is 230°C, and the temperature in the sixth temperature zone The temperature is 230° C., the head temperature of the twin-screw extruder is 180° C., and the screw speed is 180 r / min.

Embodiment 2

[0035] (1) Weigh 90 parts by weight of PBT, 16 parts of MOS treated with coupling agent, and 5 parts of nano-SiO 2 , 0.25 parts of Irganox168 and 0.25 parts of Irganox1010 are mixed and stirred evenly to obtain a mixture;

[0036] (2) Put the mixture obtained in step (1) into the hopper of the twin-screw extruder and extrude and pelletize to obtain the flame-retardant PBT composite material P2, wherein the first temperature zone of the twin-screw extruder The temperature is 220°C, the temperature in the second temperature zone is 270°C, the temperature in the third temperature zone is 270°C, the temperature in the fourth temperature zone is 270°C, the temperature in the fifth temperature zone is 270°C, and the temperature in the sixth temperature zone The temperature is 270° C., the head temperature of the twin-screw extruder is 270° C., and the screw speed is 300 r / min.

Embodiment 3

[0038] (1) Weighing parts by weight are 80 parts of PBT, 13 parts of MOS, and 3 parts of SiO 2 , 0.15 parts of Irganox168 and 0.15 parts of Irganox1010 were mixed and stirred evenly to obtain a mixture;

[0039] (2) Put the mixture obtained in the step (1) into the hopper of the twin-screw extruder and extrude and granulate to obtain the flame-retardant PBT composite material P3, wherein the first temperature zone of the twin-screw extruder The temperature is 195°C, the temperature in the second temperature zone is 250°C, the temperature in the third temperature zone is 250°C, the temperature in the fourth temperature zone is 250°C, the temperature in the fifth temperature zone is 250°C, and the temperature in the sixth temperature zone is 250°C. The temperature is 250° C., the head temperature of the twin-screw extruder is 250° C., and the screw speed is 240 r / min.

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Abstract

The invention provides a flame-retardant PBT composite material and a preparation method thereof. The composite material is prepared from the following components in parts by weight: 70-90 parts of PBT, 10-16 parts of MOS, 1-5 parts of SiO2 and 0.2-0.5 part of antioxidant. According to the flame-retardant PBT composite material, the MOS is dispersed in the PBT, and the compatibility of the PBT is improved, so that mechanical performance of the composite material is improved; and the MOS is heated and decomposed into magnesium oxide to form a surface carbonization layer to prevent entrance of heat and oxygen and improve the flame-retardant effect of the composite material. Furthermore, SiO2 particles have an effect of inducing crystallization of the PBT, heterogeneous nucleation of the PBT is promoted, and the PBT can be crystallized more completely, so that the mechanical performance of the PBT alloy material can be remarkably improved.

Description

technical field [0001] The invention relates to the field of flame-retardant materials, in particular to a flame-retardant PBT composite material and a preparation method thereof. Background technique [0002] Polybutylene terephthalate (PBT) is an engineering plastic with excellent comprehensive properties. It has excellent physical and mechanical properties in a wide temperature range. The long-term use temperature can reach 120 ° C. At high temperature and high frequency, the electrical properties are still good, but the corona resistance is poor, and the physical properties and flame retardancy at high temperature are not good, which greatly limits the application of PBT. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a flame-retardant PBT composite material with relatively simple components, excellent physical properties and good flame-retardant effect and a preparation method thereof. [0004] In order to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08K13/06C08K3/30C08K3/34C08K9/04C08K5/134C08K5/526
Inventor 刘凯黄家奇程健
Owner ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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