Reinforced flame-retardation PBT/PA6 composite material and preparation method thereof

A composite material and pre-mixing technology, applied in the field of modification of engineering plastics, can solve problems such as incompatibility, and achieve the effects of improving compatibility, preventing glass fiber from being exposed, and improving rigidity and impact strength.

Active Publication Date: 2016-03-16
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, PA6 of PBT is an incompatible system, and improving its compatibility is a major problem in the field of engineering plastics research.

Method used

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  • Reinforced flame-retardation PBT/PA6 composite material and preparation method thereof
  • Reinforced flame-retardation PBT/PA6 composite material and preparation method thereof
  • Reinforced flame-retardation PBT/PA6 composite material and preparation method thereof

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Experimental program
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Effect test

preparation example Construction

[0028] The preparation method comprises steps:

[0029](1) Premixing: Add PBT, PA6, modified TPU, composite flame retardant, antioxidant, etc. into a high-speed mixer in sequence for premixing, the mixing temperature is 30-50°C, and the speed is 100-800 rpm. The mixing time is 1-5 minutes to become material A; then add glass fiber, amino-modified silicone oil, and aminosilane coupling agent to a low-speed mixer for mixing. The mixing temperature is 30-40°C and the rotation speed is 50-100 rpm , the mixing time is 5 to 15 minutes, and it becomes material B;

[0030] (2) Extrusion granulation: Add the premixed material A from the main feeder to a twin-screw extruder with an aspect ratio of 35 to 45, and add material B such as glass fiber from the side feeder, and melt and extrude For granulation, the screw speed is 100-300 rpm, and the main feeder speed is 10-60 rpm. The temperature of each section of the extruder is 180-280°C.

[0031] The dried reinforced PBT / PA6 composite ...

Embodiment 1

[0034] Weigh each raw material according to the following proportions: 35.3 parts by mass of PBT, 15.0 parts by mass of PA6, 10.0 parts by mass of modified TPU, 0.8 parts by mass of aminosilicone oil, and 0.8 parts by mass of aminosilane coupling agent KH550 is 0.6 parts by mass, chopped glass fiber is 20 parts by mass, decabromodiphenyl ether is 9 parts by mass, antimony trioxide is 3 parts by mass, and polyphenylene ether is 6 parts by mass. Parts, 1010 parts by mass of antioxidant is 0.1 part, and 168 parts by mass of antioxidant is 0.2 part. Add PBT, PA6, modified TPU, composite flame retardant (decabromodiphenyl ether, antimony trioxide, polyphenylene ether), antioxidant 1010 and antioxidant 168, etc. into the high-speed mixer in sequence for pre-mixing, mixing The temperature is 35°C, the rotation speed is 200 rpm, and the mixing time is 2.5 minutes to become material A; then glass fiber, amino-modified silicone oil, and aminosilane coupling agent are added to a low-spee...

Embodiment 2

[0037] Weigh each raw material according to the following proportions: 30.0 parts by mass of PBT, 11.6 parts by mass of PA6, 10.0 parts by mass of modified TPU, 0.5 parts by mass of aminosilicone oil, and 0.5 parts by mass of aminosilane coupling agent 0.6 parts by mass of KH550, 30 parts by mass of chopped glass fiber, 8 parts by mass of decabromodiphenyl ether, 3 parts by mass of antimony trioxide, and 6 parts by mass of polyphenylene ether Parts, 1010 parts by mass of antioxidant is 0.1 part, and 168 parts by mass of antioxidant is 0.2 part. Add PBT, PA6, modified TPU, composite flame retardant (decabromodiphenyl ether, antimony trioxide, polyphenylene ether), antioxidant 1010 and antioxidant 168, etc. into the high-speed mixer in sequence for pre-mixing, mixing The temperature is 30°C, the rotation speed is 250 rpm, and the mixing time is 2 minutes to become material A; then glass fiber, amino-modified silicone oil, and aminosilane coupling agent are added to a low-speed m...

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Abstract

A disclosed reinforced flame-retardation PBT/PA6 composite material comprises the following compositions in parts by mass: 28.2-35.3 parts by mass of PBT, 10-15 parts by mass of PA6 , 10-15 parts by mass of modified TPU, 0.5-2 parts by mass of amino-modified silicone oil, 0.6-1.2 parts by mass of an amino silane coupling agent, 20-30 parts by mass of glass fiber, 17-18 parts by mass of a composite fire retardant, and 0.3-0.6 parts by mass of an anti-oxidant. The invention also discloses a preparation method for the above reinforced flame-retardation PBT/PA6 composite material. According to the technical scheme, the compatibility of PBT with PA6, and PBT and PA6 with glass fiber is improved, and the composite material with relatively high mechanical properties and good flame retardation performance and processing property is obtained, is applied to automobile electrical appliance connectors, and is adaptable to relatively severer driving environment.

Description

technical field [0001] The invention relates to the field of modification of engineering plastics, in particular to a reinforced flame-retardant PBT / PA6 composite material and a preparation method thereof. Background technique [0002] Polybutylene terephthalate (PBT) is a crystalline aromatic polyester that was first industrially produced by Celanese Corporation. With the vigorous development of the domestic petrochemical industry, as of the end of 2014, the domestic PBT production capacity has expanded to 810,000 tons. At present, PBT has been widely used in many fields such as fibers, films and reinforced engineering plastics, showing excellent weather resistance, heat resistance and strength. [0003] In terms of molecular structure characteristics, the PBT macromolecule is a linear structure, and its repeating structural unit has a benzene ring that is difficult to move and a weakly polar ester group. Due to the formation of a conjugated system between the benzene rin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L77/02C08L75/06C08L71/12C08L83/08C08K13/06C08K9/06C08K7/14C08K3/22C08K5/526
CPCC08L67/02C08L2205/035C08L2201/02C08L77/02C08L75/06C08L71/12C08L83/08C08K13/06C08K9/06C08K7/14C08K3/2279C08K5/526
Inventor 杨军忠任力王迎军
Owner SOUTH CHINA UNIV OF TECH
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