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Anti-hydrolysis low warping PBT composite material as well as preparation method and application thereof

A composite material and hydrolysis resistance technology, applied in the field of modified plastics, can solve the problems of limited content of terminal carboxyl groups in the hydrolysis resistance of PBT resin, research on warpage of non-PBT composite materials, and high price of polycarbodiimide, so as to improve the hydrolysis resistance. performance, reducing shrinkage differences, reducing the effect of hydrolysis

Inactive Publication Date: 2019-08-27
GUANGZHOU SUPER DRAGON ENG PLASTICS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above patents have the following deficiencies: (1) the price of polycarbodiimide is very high, and even a small amount of addition will bring a significant increase in cost; (2) the content of the carboxyl end group that affects the hydrolysis resistance of the PBT resin is not explained or Limitation; (3) The warpage of PBT composites has not been studied

Method used

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  • Anti-hydrolysis low warping PBT composite material as well as preparation method and application thereof
  • Anti-hydrolysis low warping PBT composite material as well as preparation method and application thereof
  • Anti-hydrolysis low warping PBT composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A method for preparing a hydrolysis-resistant low-warp PBT composite material, comprising the following steps:

[0041] (1) take raw materials by the amount of PBT, ABS, compatibilizer, toughening agent, antioxidant and lubricant in table 1;

[0042] (2) Mix various raw materials in the mixer for 5 minutes, then add them to the main feeding hopper of the extruder, add glass fiber to the side feeding hopper, and extrude and granulate through the twin-screw extruder.

[0043] The rotational speed of the twin-screw extruder is 300r / min, and the temperature is 200-250°C. The performance of the obtained hydrolysis-resistant and low-warpage PBT composite material is shown in Table 2.

Embodiment 2

[0045] A method for preparing a hydrolysis-resistant low-warp PBT composite material, comprising the following steps:

[0046] ((1) take raw materials by the amount of PBT, ABS, compatibilizer, toughening agent, antioxidant and lubricant in table 1;

[0047] (2) Mix various raw materials in the mixer for 3 minutes, then add them to the main feeding hopper of the extruder, add glass fiber to the side feeding hopper, and extrude and granulate through the twin-screw extruder.

[0048]The rotational speed of the twin-screw extruder is 500r / min, and the temperature is 200-250°C. The performance of the obtained hydrolysis-resistant and low-warpage PBT composite material is shown in Table 2.

Embodiment 3～4

[0050] Examples 3-4 After weighing the raw materials according to Table 1, the hydrolysis-resistant and low-warpage PBT composite material was prepared according to the method of Example 1. The properties of the obtained hydrolysis-resistant and low-warpage PBT composite material are shown in Table 2.

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Abstract

The invention belongs to the field of plastics, and particularly discloses an anti-hydrolysis low warping PBT composite material as well as a preparation method and an application thereof. The composite material is prepared from polybutylene terephthalate (PBT), an acrylonitrile-butadiene-styrene ternary copolymer (ABS), glass fibers, a compatilizer, a flexibilizer, an antioxidant and a lubricant.Started with the raw materials, the hydrolysis resistance of the PBT composite material is improved by adopting the low terminal carboxyl group content PBT resin and the hydrolysis resistant glass fibers. By compounding with the ABS, warping of the PBT composite material is reduced. The preparation method is simple to operate, and the obtained anti-hydrolysis low warping PBT composite material has excellent hydrolysis resistance and dimensional stability, can be used in the field of automobile connectors with relatively high demand on hydrolysis resistance and dimensional stability, and has avery good market promotional prospect.

Description

technical field [0001] The invention belongs to the field of modified plastics, and in particular relates to a hydrolysis-resistant and low-warpage PBT composite material and a preparation method and application thereof. Background technique [0002] Polybutylene terephthalate (PBT) is milky white translucent to opaque, crystalline thermoplastic saturated polyester, PBT resin is known for its excellent mechanical properties, electrical properties, heat resistance, processing properties, especially good comprehensive It is widely used in the fields of electronic appliances, automobile industry and machinery, instrumentation and household appliances. However, like other polyesters, PBT also has the problem of not being resistant to hydrolysis. PBT is usually formed by the dehydration condensation of terephthalic acid and 1,4-butanediol. This is a reversible reaction. Under the action of water, PBT may be hydrolyzed, which shortens the molecular chain, reduces the strength of ...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08L55/02C08L23/08C08L83/04C08K7/14
CPCC08K2201/003C08K2201/004C08L67/02C08L2205/035C08L55/02C08L23/0884C08L83/04C08K7/14
Inventor 黄泽彬郝建鑫郝源增陈瑜曾德明谯盛元
Owner GUANGZHOU SUPER DRAGON ENG PLASTICS