Halogen-free expanded flame-retardant PBT and preparation method thereof

A technology of intumescent flame retardant and intumescent flame retardant, which is applied in the field of flame retardant materials, can solve the problems of poor water resistance and migration resistance, flame retardant efficiency and mechanical properties, and achieve high flame retardant efficiency and excellent processing performance , easy-to-control effects

Active Publication Date: 2014-12-03
BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such as CN1715272A, CN1709968A, CN101024632A have all reported this kind of intumescent flame retardant char forming agent; In addition, the literature (J.Polymer Degration and Stability.91,1380-1386,2006 also reported the formation of linear polymeric triazine derivatives Charcoal agent and synthetic method thereof; But because the polymeric triazine derivative charcoal agent reported or disclosed at present is all linear, and wherein is rich in hydroxyl or amino group, so its water resistance and migration resistance are still relatively poor, and then to Flame retardant efficiency and mechanical properties are greatly affected

Method used

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  • Halogen-free expanded flame-retardant PBT and preparation method thereof
  • Halogen-free expanded flame-retardant PBT and preparation method thereof
  • Halogen-free expanded flame-retardant PBT and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0039] Raw materials: in terms of mass percentage, 83% of PBT base material, 17% of halogen-free intumescent flame retardant;

[0040] Among them, the halogen-free intumescent flame retardant is composed of a triazine-based hyperbranched macromolecular char-forming agent and an acid source. The acid source is ammonium polyphosphate. The mass ratio of the triazine-based hyperbranched macromolecular char-former to the acid source is 2:1;

[0041] Put the raw materials in a high-speed mixer and mix them evenly, dry them under vacuum at 60°C, melt them and extrude them in a twin-screw extruder, cool them and cut them into pellets to obtain a halogen-free intumescent flame-retardant PBT composite material.

Embodiment 2

[0043] Raw materials: in terms of mass percentage, 65% of PBT substrate, 34% of halogen-free intumescent flame retardant, 0.5% of flame retardant synergist5 and 0.5% of antioxidant;

[0044] Among them, the halogen-free intumescent flame retardant is composed of a triazine hyperbranched macromolecular char former and an acid source, and the mass ratio of the triazine hyperbranched macromolecular char former to the acid source is 3:1;

[0045] Ammonium polyphosphate and melamine phosphate are selected as the acid source;

[0046] The flame retardant synergist is organically modified vermiculite;

[0047] The anti-dripping agent is modified polytetrafluoroethylene coated with SAN;

[0048] Antioxidant is the mixture of antioxidant 1010 and antioxidant 1076;

[0049] Put the raw materials in a high-speed mixer and mix them evenly, dry them under vacuum at 55°C, melt them and extrude them in a twin-screw extruder, cool them and cut them into pellets to obtain a halogen-free intu...

Embodiment 3

[0051] Raw materials: in terms of mass percentage, 70% of PBT base material, 25% of halogen-free intumescent flame retardant, 4.6% of flame retardant synergist, 0.1% of anti-dripping agent and 0.3% of antioxidant;

[0052] Among them, the halogen-free intumescent flame retardant is composed of a triazine hyperbranched macromolecular char former and an acid source, and the mass ratio of the triazine hyperbranched macromolecular char former to the acid source is 4:1;

[0053] The acid source is a mixture of ammonium polyphosphate, melamine phosphate and melamine pyrophosphate;

[0054] The flame retardant synergist is a mixture of organically modified montmorillonite, organically modified rectorite, and organically modified vermiculite;

[0055] The anti-dripping agent is modified polytetrafluoroethylene coated with SAN;

[0056] The antioxidant is antioxidant 1076;

[0057] Put the raw materials in a high-speed mixer and mix them evenly, dry them under vacuum at 65°C, melt th...

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Abstract

The invention relates to the field of flame-retardant materials, and in particular relates to halogen-free expanded flame-retardant PBT and a preparation method thereof. The halogen-free expanded flame-retardant PBT is prepared from the following raw materials in percentage by mass: 65-83% of PBT base material, 17-34% of halogen-free expanded flame retardant, 0-5% of flame-retardant synergist, 0-0.2% of anti-dripping agent and 0-0.5% of antioxidant, wherein the halogen-free expanded flame retardant consists of a triazine hyperbranched structure macromolecule carbonizing agent and an acid source. The halogen-free expanded flame-retardant PBT provided by the invention has the characteristics of high flame-retardant efficiency, dense formed carbon layer and low combustion toxicity, and can reduce the influence of the flame retardant on the chemical property. The preparation method of the expanded flame retardant comprises the following steps: uniformly mixing raw materials, drying in vacuum at 55-65 DEG C, melting, and pelletizing, thereby obtaining the expanded flame retardant. The halogen-free expanded flame-retardant PBT is simple and feasible, easy to control and convenient for realizing industrial production.

Description

technical field [0001] The invention relates to the field of flame retardant materials, in particular to a halogen-free intumescent flame retardant PBT and a preparation method thereof. Background technique [0002] Polybutylene terephthalate (PBT) is a crystalline thermoplastic resin, due to its excellent mechanical and insulating properties, good self-lubrication and processability, excellent thermal stability and good chemical stability. It is often used in electronic appliances, auto parts, and mechanical equipment. Since PBT itself is easy to burn, it is difficult to form charcoal, and it drips continuously during burning, which can easily cause flames to spread and cause fires. Therefore, in order to meet the product's resistance to polymer materials To meet the requirements of flame performance, it is necessary to carry out effective flame retardant modification of PBT. [0003] At present, the main flame retardants used in PBT include halogenated flame retardants an...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): C08L67/02C08K5/3492C08K3/32C08K3/34C08K3/22C08K3/38
Inventor许博钱立军许梦兰
OwnerBEIJING TECHNOLOGY AND BUSINESS UNIVERSITY