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Halogen-free expansion type retardant polyethylene contg. organic metal complex

A technology of flame retardant polyethylene and intumescent flame retardant, which is applied in the field of polyolefin flame retardant products, can solve the adverse effects of ammonium polyphosphate on the hygroscopic flame retardant performance, the droplet resistance needs to be improved, and the addition of flame retardants is large and other problems, to achieve the effect of reducing adverse effects, improving vertical combustion, and reducing the amount of addition

Active Publication Date: 2007-09-12
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although polyethylene treated with these intumescent flame retardants exhibits low-smoke, non-toxic, good flame-retardant effect and certain droplet resistance, there are still problems of one kind or another to varying degrees: such as flame-retardant effect It is not ideal enough, the droplet resistance needs to be improved, the amount of flame retardant added is relatively large, and the added ammonium polyphosphate will have a negative impact on the flame retardant performance due to its hygroscopicity, etc.

Method used

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  • Halogen-free expansion type retardant polyethylene contg. organic metal complex
  • Halogen-free expansion type retardant polyethylene contg. organic metal complex
  • Halogen-free expansion type retardant polyethylene contg. organic metal complex

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Experimental program
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Effect test

Embodiment 1～14

[0024] (1) synthesis of pentaerythritol ester:

[0025] 2.72 grams of pentaerythritol, 12.72 grams of 1-oxo-4-hydroxymethyl-1-phospha-2,6,7-trioxabicyclo[2,2,2] octane (PEPA) acid chloride product was added Stir to dissolve in a three-necked flask with 100ml of dioxane, and add 0.15ml of pyridine dropwise; heat up to 95-105°C for reflux reaction for 6 hours; cool to room temperature, and then wash the product with dioxane and chloroform respectively 1-2 times to obtain a white solid product; finally dry it in a vacuum oven at 70°C for later use. The infrared spectrum of this pentaerythritol ester product obtained is as shown in the accompanying drawing, and its concrete structure is as follows: 3456cm -1 and 1121cm -1 For O-H; 2924cm -1 It is an aliphatic C-H structure; 1736cm -1 and 11234cm -1 For ester group; 1295cm -1 and 1001cm -1 Phosphate group; 873cm -1 and 835cm -1 It is a cage-like bicyclic phosphate structure.

[0026] (2) mechanical mixing polyethylene, pe...

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Abstract

A non-halogen expansion-type flame-retarding polyethene is prepared from polyethen (70-80 Wt%), composite expansion-type flame retardant containing pentaerythritol ester (17-29.5) and organic metallic complex (0.5-3). Its advantages are high flame-retarding effect and no fusion dropping.

Description

1. Technical field [0001] The invention belongs to the technical field of polyolefin flame-retardant products, in particular, the invention relates to a halogen-free polyethylene with higher flame-retardant efficiency containing an intumescent compound flame retardant and an organic metal complex. 2. Background technology [0002] Polyethylene is widely used in many industries such as packaging, building materials, automobiles, electronics / electrics, and daily necessities because of its light weight, low toxicity, and excellent insulation and mechanical properties. However, it is highly flammable and melts after burning. It is easy to cause new disasters and casualties, making it difficult to achieve the high flame retardant level required in the electrical and construction industries, which greatly affects its application in these industries. [0003] Flame retardants are a class of additives that can prevent polymer materials from being ignited or inhibit flame propagation...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08K5/52
Inventor 王玉忠谢飞杨冰赵国明赵娇
Owner SICHUAN UNIV
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