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Halogen-free flame-retardant polyethylene composite material and preparation method thereof

A flame retardant polyethylene and composite material technology, applied in the field of halogen-free flame retardant polyethylene composite material and its preparation, can solve the problems of cumbersome processing technology and unstable flame retardant performance of polyethylene products, and achieve good comprehensive mechanical properties, The effect of small addition amount and high flame retardant efficiency

Inactive Publication Date: 2013-03-13
NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above methods can solve the problems of intumescent flame retardants to a certain extent, the processing technology is cumbersome and the flame retardancy of polyethylene products is unstable.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A halogen-free flame-retardant polyethylene composite material, consisting of the following raw materials in parts by weight: 70.0 parts of high-density polyethylene resin, 1.0 parts of a 1:1 mixture of antioxidant 1010 and antioxidant 168, pentaerythritol stearic acid 0.7 parts of ester, 25.0 parts of phenoxy polyphosphazene elastomer, 20.0 parts of magnesium hydroxide, 30.0 parts of calcium carbonate, and 6.0 parts of rare earth coupling agent.

[0044] Its preparation method is as follows:

[0045]Step 1: Mix 3 / 10~1 / 2 polyethylene, phenoxy polyphosphazene elastomer, 3 / 10~2 / 5 antioxidant and 2 / 5~1 / 2 processing aid at 130℃ in proportion ~ 150 ° C in the internal mixer for 15 ~ 20 minutes, take out and crush to obtain polyethylene masterbatch containing phenoxy polyphosphazene;

[0046] The second step: mix the polyethylene masterbatch containing phenoxy polyphosphazene, magnesium hydroxide, calcium carbonate, rare earth coupling agent and the remaining polyethylene, a...

Embodiment 2

[0048] A halogen-free flame-retardant polyethylene composite material, consisting of the following raw materials in parts by weight: 72.0 parts of high-density polyethylene resin, 1.2 parts of a 1.2:1 mixture of antioxidant 1010 and antioxidant 168, pentaerythritol stearic acid 0.9 parts of ester, 28.0 parts of phenoxy polyphosphazene elastomer, 24.5 parts of magnesium hydroxide, 33.0 parts of calcium carbonate, and 7.0 parts of rare earth coupling agent.

[0049] Its preparation method is with embodiment 1.

Embodiment 3

[0051] A halogen-free flame-retardant polyethylene composite material, consisting of the following raw materials in parts by weight: 74.5 parts of high-density polyethylene resin, 1.5 parts of a 1.5:1 mixture of antioxidant 1010 and antioxidant 168, pentaerythritol stearic acid 1.0 parts of ester, 30.0 parts of phenoxy polyphosphazene elastomer, 26.0 parts of magnesium hydroxide, 35.0 parts of calcium carbonate, and 8.0 parts of rare earth coupling agent.

[0052] Its preparation method is with embodiment 1.

[0053] The specific performance data of each embodiment are shown in the following table:

[0054]

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Abstract

The invention aims to provide a halogen-free flame-retardant polyethylene composite material which is characterized by comprising the following raw materials in parts by weight: 72.0 parts of high-density polyethylene resin, 1.2 parts of mixture of antioxidant 1010 and antioxidant 168 in a ratio of 1.2:1, 0.9 part of pentaerythritol stearate, 28.0 parts of phenoxy polyphosphazene elastomer, 24.5 parts of magnesium hydroxide, 33.0 parts of calcium carbonate and 7.0 parts of rare-earth coupling agent. The invention also provides a preparation method of the material. Compared with the traditional halogen-free flame-retardant polyethylene, the synergic addition of the phenoxy polyphosphazene, nano magnesium hydroxide and calcium carbonate greatly enhances the flame retardancy of polyethylene; and the obtained polyethylene has favorable comprehensive mechanical properties, and does not generate molten drops and has small smoking amount when being combusted.

Description

technical field [0001] The invention relates to a halogen-free flame-retardant polyethylene composite material and a preparation method thereof, belonging to the technical field of polymer materials. Background technique [0002] Polyethylene (PE) has the advantages of excellent chemical stability, low temperature resistance, electrical insulation and formability, and is light in weight, non-toxic and low in price, so it is widely used in the fields of daily necessities, films, pipes and wires and cables. application, becoming the most used thermoplastic. However, its limiting oxygen index is low (16% to 18%), it is very easy to burn when it is heated or in the process of discharging, and there is a droplet phenomenon, which restricts its further application. At present, flame retardant polyethylene mainly adopts the method of internally adding flame retardants, which are divided into the following two types: ①Introducing halogenated flame retardants into polyethylene, this...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L23/06C08L85/02C08K13/02C08K3/22C08K3/26C08K5/103
Inventor 张艳辉王志锋尚龙安曹继平
Owner NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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