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Low-smoke halogen-free flame-retardant sealing strip and method for preparing same

A technology of sealing strips and intumescent flame retardants, which is applied in chemical instruments and methods, and other chemical processes, can solve the problems of insufficient flame retardancy, achieve good flame retardancy, reduce usage, and comprehensive performance Improved effect

Active Publication Date: 2017-08-18
浙江博达汽车零部件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is flammable, and its own flame retardancy is far from meeting the requirements in engineering applications. In recent years, the environmental protection performance of flame retardant materials has been attached great importance, so there are more and more researches on non-halogen flame retardant materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1 Preparation of intumescent flame retardant polyphosphate polyethyleneimine salt

[0022] Dissolve 10 kg of polyethyleneimine in 100 kg of methanol, add dropwise 20 kg of polyphosphoric acid aqueous solution with a mass concentration of 5%, react at 60°C for 1 hour, filter to obtain a precipitate, wash 3 times with methanol, Dry at ℃ for 12 hours to prepare intumescent flame retardant polyphosphate polyethyleneimine salt.

Embodiment 2

[0024] The preparation operation of the intumescent flame retardant poly(ethyleneimine polyphosphate) is the same as in Example 1. The feed ratio of polyethyleneimine to polyphosphoric acid is 100:50, the mass ratio of polyethyleneimine to methanol is 1:20, the mass concentration of polyphosphoric acid aqueous solution is 30%, the reaction temperature is 30°C, and the reaction time is 3 hours.

Embodiment 3

[0026] The preparation operation of the intumescent flame retardant poly(ethyleneimine polyphosphate) is the same as in Example 1. The feed ratio of polyethyleneimine to polyphosphoric acid is 100:20, the mass ratio of polyethyleneimine to methanol is 1:12, the mass concentration of polyphosphoric acid aqueous solution is 20%, the reaction temperature is 45°C, and the reaction time is 2 hours.

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PUM

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Abstract

The invention relates to a flame-retardant sealing strip, in particular to a low-smoke halogen-free flame-retardant sealing strip and a method for preparing the same. The low-smoke halogen-free flame-retardant sealing strip comprises, by weight, 100 parts of ethylene propylene diene monomer rubber, 10-40 parts of naphthenic oil, 10-40 parts of carbon black, 5-20 parts of white carbon black, 5-40 parts of intumescent flame retardants, 5-25 parts of complex smoke suppressants, 0.5-1.5 parts of stearic acid, 1.0-3.5 parts of zinc oxide, 4.0-8.5 parts of sulfur, 2.0-4.5 parts of accelerators, 1.0-3.5 parts of vulcanization accelerators and 1.0-3.0 parts of anti-aging agents. The intumescent flame retardants are products prepared by means of ionic reaction on polyethylenimine and polyphosphoric acid. The low-smoke halogen-free flame-retardant sealing strip and the method have the advantages that the low-smoke halogen-free flame-retardant sealing strip is free of halogen, low in smoke, good in flame-retardant property and excellent in comprehensive performance, and the like.

Description

technical field [0001] The invention relates to a flame-retardant sealing strip, in particular to a low-smoke, halogen-free flame-retardant sealing strip and a preparation method thereof. Background technique [0002] Rail vehicle is the general term for railway, urban light rail and subway train. Due to the characteristics of large capacity, fast, convenient, safe and comfortable rail vehicles, my country has made the large-scale development of rail transit one of the key points of infrastructure construction. Generally, rail vehicles carry a large amount of passengers and require high safety performance. Rail vehicle door and window sealing strips should not only have excellent flame retardant properties, but also have the characteristics of low smoke, halogen-free, and no dripping when burning, so as to ensure the personal safety of passengers in the event of a vehicle fire. In addition, the sealing strip is installed on the aluminum alloy profile door frame or window f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08L91/00C08L79/02C08K13/06C08K3/04C08K3/36C08K3/22C08K3/38C08K3/28C09K3/10
CPCC08K2003/387C08L23/16C08L2201/02C08L2201/22C08L2205/03C09K3/10C08L91/00C08L79/02C08K13/06C08K3/04C08K3/36C08K3/22C08K3/38C08K3/28
Inventor 黎远波赵均才王真理朱旭俏陈志勇
Owner 浙江博达汽车零部件有限公司
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