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Heat-resistant hydrolysis-resistant glass fiber-reinforced PBT/EVOH composition and preparation method thereof

A composition and hydrolysis-resistant technology, applied in the field of polymer materials, can solve the problems of increased comprehensive cost of materials, attenuation of heat and oxygen aging resistance, poor compatibility, etc., to delay hydrolysis and thermal degradation rates, and maintain high performance , Improve the effect of long-term heat resistance

Active Publication Date: 2020-12-04
JIANGSU KINGFA SCI & TECH ADVANCED MATERIALS CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the compatibility of PVDF, POK and PBT is poor, and additional compatibilizers need to be added during processing, and the overall cost of materials is also greatly increased
Moreover, according to the experience of plastic modification, the heat and oxygen aging resistance of the incompatible blend system will be attenuated.

Method used

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  • Heat-resistant hydrolysis-resistant glass fiber-reinforced PBT/EVOH composition and preparation method thereof
  • Heat-resistant hydrolysis-resistant glass fiber-reinforced PBT/EVOH composition and preparation method thereof
  • Heat-resistant hydrolysis-resistant glass fiber-reinforced PBT/EVOH composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The results of Example 1 are compared with the results of Comparative Examples 1-3 and show: when EVOH and polyphosphate were not added, the hydrolysis resistance and thermal aging resistance of PBT were all poor; when EVOH or polyphosphate components were added alone, The hydrolysis resistance and heat aging resistance of the PBT composition are not as good as the PBT / EVOH composition when the two types of components are added at the same time, which proves that EVOH and polyphosphate have a synergistic effect, and the joint effect can significantly improve the PBT composition. Hydrolysis resistance and heat aging resistance.

[0044] The results of Examples 1-5 show that: when adding 1% polyphosphate, the introduction of 8-20% EVOH resin has little effect on the initial physical properties of glass fiber reinforced PBT materials, and significantly improves the long-term and short-term properties of the material. Hydrolysis resistance and long-term thermal oxygen aging...

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Abstract

The invention relates to a heat-resistant hydrolysis-resistant glass fiber-reinforced PBT / EVOH composition and a preparation method thereof. The heat-resistant hydrolysis-resistant glass fiber-reinforced PBT / EVOH composition comprises PBT resin, EVOH resin, glass fibers, a chain extender, a hydrolysis-resistant agent, polyphosphate, an antioxidant and a lubricant. On the basis of a traditional hydrolysis-resistant PBT composition formula, the EVOH resin and the polyphosphoester which have good compatibility with PBT are introduced, the long-term and short-term hydrolysis resistance of glass fiber-reinforced PBT can be greatly improved under the combined action of the EVOH resin and the polyphosphoester, the long-term thermo-oxidative aging resistance of the PBT / EVOH composition is remarkably improved, and the PBT / EVOH composition has good market application prospects.

Description

technical field [0001] The invention belongs to the field of polymer materials, in particular to a heat-resistant and hydrolysis-resistant glass fiber reinforced PBT / EVOH composition and a preparation method thereof. Background technique [0002] Polybutylene terephthalate (PBT for short) is a polymer formed by dehydration and polycondensation of terephthalic acid and butanediol at high temperature. Performance and high cost performance, widely used in automotive electronics, lighting systems and household appliances and other fields. PBT is a semi-crystalline polymer with high molding shrinkage and low notched impact strength. Therefore, the industry uses glass fiber reinforcement to improve its dimensional stability, mechanical properties and heat distortion temperature. PBT itself has a very low water absorption rate (<0.1%), and has better dimensional stability than nylon materials in terms of dimensional changes after moisture absorption. However, in high-temperatu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L23/08C08L85/02C08L79/00C08L25/14C08K13/06C08K9/06C08K7/14C08K5/134C08K5/526C08J5/08
CPCC08J5/08C08J2367/02C08J2423/08C08J2485/02C08J2479/00C08J2425/14C08K13/06C08K9/06C08K7/14C08K5/1345C08K5/526
Inventor 叶士兵张超肖军华丁正亚林洁龙邱志强安朋刘纪庆杨良波夏建盟
Owner JIANGSU KINGFA SCI & TECH ADVANCED MATERIALS CO LTD
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