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High-impact long-acting yellowing-resistant PBT (polybutylene terephthalate) reinforced flame-retardant composite material as well as preparation method and application thereof

A flame-retardant composite material and anti-yellowing technology, which is applied in the field of engineering plastics to achieve the effect of reducing degradation or qualitative change

Pending Publication Date: 2022-07-22
SHANGHAI KINGFA SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the yellowing resistance and mechanical properties of PBT reinforced flame retardant materials need to be further improved at the same time in the prior art, and to provide a high impact, long-term yellowing resistant PBT reinforced flame retardant composite material

Method used

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  • High-impact long-acting yellowing-resistant PBT (polybutylene terephthalate) reinforced flame-retardant composite material as well as preparation method and application thereof
  • High-impact long-acting yellowing-resistant PBT (polybutylene terephthalate) reinforced flame-retardant composite material as well as preparation method and application thereof
  • High-impact long-acting yellowing-resistant PBT (polybutylene terephthalate) reinforced flame-retardant composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～13

[0057] This example provides a series of PBT reinforced flame retardant composite materials with high impact and long-term yellowing resistance, which are prepared according to the formulas in Tables 1-2 and according to the preparation method including the following steps:

[0058] S1.PBT resin was dried at 120℃ for 4h;

[0059] S2. According to the formula in Tables 1-2, the dried PBT resin, brominated flame retardant, antimony white, glass fiber, toughening agent, rutile titanium dioxide, hindered phenolic antioxidant, thiocyanate The ester antioxidant and the benzotriazole light stabilizer are added to the high-speed mixer, and mixed for 10 minutes at a speed of 300-600 rpm to obtain a uniformly mixed mixed raw material;

[0060] S3. Add the mixed raw material obtained in S2. into the twin-screw extruder from the main feeding port, and add the glass fiber into the twin-screw extruder from the side feeding port. In the twin-screw extruder, the temperature of the screw From...

Embodiment 1

[0097] The results of Example 1, Example 9 and Comparative Example 5 show that the particle size of rutile-type titanium dioxide has a great influence on the performance of the material. In Comparative Example 5, rutile titanium dioxide with larger particle size was selected, and the impact strength of the material decreased significantly.

[0098] The results of Example 1 and Examples 10-13 show that the combination of the antioxidants of the present invention has a certain influence on the performance.

[0099] The results of Comparative Examples 1-3 and 8-9 show that there is a synergistic effect between rutile titanium dioxide, hindered phenolic antioxidants, thioester antioxidants and benzotriazole light stabilizers.

[0100] The results of Comparative Examples 4, 6-7, and Comparative Example 10 show that the combination of specific types of titanium dioxide, antioxidants and light stabilizers selected in the present invention can play a synergistic effect, making the res...

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Abstract

The invention provides a PBT (polybutylene terephthalate) reinforced flame-retardant composite material with high impact and long-acting yellowing resistance as well as a preparation method and application of the PBT reinforced flame-retardant composite material. Comprising the following components in parts by weight: 40 to 60 parts of PBT (Polybutylene Terephthalate) resin, 11 to 13 parts of brominated flame retardant, 1.5 to 3 parts of antimony white, 25 to 35 parts of glass fiber, 2 to 4 parts of flexibilizer, 2 to 5 parts of rutile titanium dioxide, 0.1 to 0.5 part of hindered phenol antioxidant, 0.1 to 0.5 part of thioester antioxidant and 0.2 to 0.5 part of benzotriazole light stabilizer. Through the synergistic effect of the rutile type titanium dioxide, the hindered phenol antioxidant, the thioester antioxidant and the benzotriazole light stabilizer, the yellowing resistance and the mechanical property of the PBT material under high temperature, high light and long-time irradiation can be remarkably improved.

Description

technical field [0001] The invention belongs to the technical field of engineering plastics, and in particular relates to a PBT reinforced flame retardant composite material with high impact and long-term resistance to yellowing, and a preparation method and application thereof. Background technique [0002] Polybutylene terephthalate (PBT) is a thermoplastic polyester, which is a crystalline thermoplastic resin with a milky white translucent to opaque surface. Because of its excellent heat resistance, weather resistance, chemical resistance, electrical insulation properties, low water absorption, good gloss properties (appearance is milky white translucent to opaque) and other properties, it is widely used, especially widely used In electronic appliances, auto parts and other products, it is one of the five major engineering plastics. [0003] In order to further improve the performance of PBT materials, we usually add glass fiber for reinforcement, and also add flame reta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L63/00C08K7/14C08K3/22C08K5/134C08K5/372C08K5/3475C08K13/04C08K5/20
CPCC08L67/02C08L2201/02C08K2003/2241C08K2201/005C08L63/00C08K7/14C08K3/22C08K5/1345C08K5/372C08K5/3475C08K13/04C08K5/20
Inventor 姚华侠陈平旭叶南飚卢立波付学俊
Owner SHANGHAI KINGFA SCI & TECH
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