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Halogen-free expansion fire retardant for polypropylene

An intumescent flame retardant, polypropylene technology, applied in the field of flame retardants for polyolefins, can solve the problems affecting the mechanical properties and prices of materials, application limitations, processing difficulties, etc. The effect of less smoke

Active Publication Date: 2010-05-12
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The biggest disadvantages of the above-mentioned mixed intumescent flame retardants are difficult processing, moisture absorption, large dosage, affecting the mechanical properties of materials and high prices, which limit the application

Method used

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  • Halogen-free expansion fire retardant for polypropylene
  • Halogen-free expansion fire retardant for polypropylene
  • Halogen-free expansion fire retardant for polypropylene

Examples

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Embodiment 1～26

[0036] Examples are shown in Table 1. First, melamine melamine salt and ammonium polyphosphate are dried to make the water content <0.2% (wt), and then pulverized to make the particle size <35 μm.

[0037] Next, put melamine melamine salt, ammonium polyphosphate, lubricant, coupling agent, and char formation accelerator into a high-speed mixer and mix for 1 to 10 minutes according to the composition shown in Table 1 to obtain a halogen-free product for polypropylene. Intumescent flame retardant.

[0038] Table 1 Proportion of halogen-free flame retardants for polypropylene

[0039]

[0040]

[0041] C in the table 18 is stearic acid; C 18 Zn Zinc stearate; C 18 Ca is calcium stearate; KH-550 is a product of γ-aminopropyltriethoxysilane; NDZ-101 is a monoalkoxy titanate coupling agent; ZQ-560 is γ-glycidyl ether A product of oxypropyltrimethoxysilane; TiO 2 Titanium dioxide; PA-6 is nylon 6.

[0042] Put the polypropylene pellets or powder and the compounded halogen...

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Abstract

A halogen-free intumescent flame retardant for polypropylene relates to a flame retardant for polyolefine, which is formulated by melamine salt, ammonium polyphosphate, lubricant, coupling agent and char-forming accelerator, wherein the percentage of each component in the total weight of the flame retardant is: 14 percent-90 percent of melamine salt, 9 percent-85 percent of ammonium polyphosphate,0.1 percent-2 percent of lubricant, 0.1 percent-2 percent of coupling agent, and 0.1 percent-5 percent of char-forming accelerator; when the flame retardant of the invention is used for the flame-proof of polyethylene powder or granular materials, and the lowest addition is 21 percent(wt), the flame-proof grade reaches the V-0 grade according to US UL94 test, so compared with the prior art, the addition of the flame retardant of the invention is greatly decreased, the cost is reduced and the processing property of the polypropylene is not affected. Compared with brominated, the halogen-free flame retardant of the invention is environment-friendly with low smoke density, small smoke mass, lower mass loss rate and big residual mass when used for the flame-proof performance of polypropylene.

Description

technical field [0001] The invention relates to a flame retardant for polyolefin, in particular to a halogen-free intumescent flame retardant for polypropylene. Background technique [0002] Flame retardant materials, especially environmentally friendly halogen-free flame-retardant polymer materials and flame-retardant technology are becoming a hot topic in research all over the world. The voice of halogen-free flame-retardant is increasing day by day. The European Union and other countries have successively issued laws and regulations to limit agent use. In order to make polymer materials flame retardant and not produce toxic smoke when burned, non-polluting flame-retardant elements must be introduced into the polymer. The most practical and effective way to introduce non-polluting flame-retardant elements into materials is to add environmentally friendly type flame retardant. [0003] At present, the flame retardant means for polymers is mainly based on adding halogen fl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08K5/54C08K3/32C08K5/521C08K5/09C08K3/22
Inventor 逯翠霞安彦杰严金荣李冬霞张瑞孟凡瑞何书艳李广东吴林美邹恩广姜进宪李洪涛王熺张怀志赵晶莹袁宗辉
Owner PETROCHINA CO LTD
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