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A water-swellable flame retardant and its preparation method and application

An intumescent flame retardant and reaction technology, applied in the field of flame retardants, can solve the problems of loss of flame retardant active ingredients, poor water resistance, etc., achieve excellent flame retardant performance, improve compatibility and dispersibility, and easily obtain raw materials Effect

Active Publication Date: 2021-04-23
EAST CHINA UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a water-resistant swelling flame retardant and its preparation method and application, so as to solve the problems of poor water resistance of existing swelling flame retardants and the loss of flame-retardant active ingredients after long-term immersion

Method used

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  • A water-swellable flame retardant and its preparation method and application
  • A water-swellable flame retardant and its preparation method and application
  • A water-swellable flame retardant and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0042] Amino trimethylene phosphonic acid melamine (relative molecular weight 551 Da) 15 grams (0.018 mole), add in the internal mixer of temperature 180 ℃, after melting, add the copolymer 41.4 grams of styrene-GMA again (epoxy value: 0.14 unit), under the condition of rotating speed 60 rpm, reacted for 20 minutes to obtain the block copolymer of aminotrimethylene phosphonic acid melamine-styrene-GMA, marked as A.

Embodiment 2

[0044] Amino trimethylene phosphonic acid melamine (relative molecular weight 551Da) 20 grams (0.036 mole), add in the Haake rheometer of temperature 150 ℃, after melting, add bisphenol A type epoxy resin 40.36 grams (epoxy value 0.52 ), reacted for 40 minutes under the condition of rotating speed 60 revs / min, obtained the block copolymer of aminotrimethylene phosphonic acid melamine-epoxy resin, marked as B.

Embodiment 3

[0046]20 grams (0.036 mole) of amino trimethylene phosphonic acid melamine (relative molecular weight 551 Da) was added in the Haake rheometer at a temperature of 200 ° C. After melting, 50.8 grams of polypropylene glycol diisocyanate (number average molecular weight 700 Da, 0.072 mol), under the condition of 60 rev / min of rotating speed, reacted for 30 minutes to obtain the block copolymer of aminotrimethylene phosphonic acid melamine-polypropylene glycol diisocyanate, marked as C.

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Abstract

The invention relates to a water-swellable flame retardant, a preparation method and application thereof. The water-swellable flame retardant is prepared by melt reaction of a melamine derivative and a hydrophobic polymer, and the molar ratio of the melamine derivative to the hydrophobic polymer is 1:1-5. The intumescent flame retardant prepared by the present invention is a high-molecular flame retardant integrated with nitrogen and phosphorus. By adjusting the amount of hydrophobic polymer added and reserving some active groups, the compatibility with the matrix resin can be improved. During the combustion process of the material, a dense expanded carbon layer is formed on the surface of the polymer through the synergistic effect of nitrogen and phosphorus, and the combustion process is low-smoke, non-toxic and non-corrosive. The flame retardant can be used alone or compounded with inorganic fillers. It can be applied to the flame retardant of nylon materials, especially when it is compounded with flake inorganic powder, it can effectively solve the problem of burning glass fiber reinforced nylon materials. Eliminate the problem of "candle wick effect" and obtain better flame retardant effect.

Description

technical field [0001] The invention relates to a flame retardant, in particular to a water-swellable flame retardant and a preparation method and application thereof. Background technique [0002] Flame retardants are functional additives that endow polymers with flame retardancy. They are mainly designed for the flame retardant modification of polymer materials. According to the types of flame retardant elements, commonly used flame retardants can be divided into halogen, nitrogen, phosphorus, etc. series, silicon series, inorganic series, etc. At present, halogen flame retardants are mostly used at home and abroad, which have the characteristics of small addition and high flame retardant efficiency, but a large amount of toxic smoke and corrosive gases will be produced during the combustion process, which not only pollutes the environment, but also endangers human beings. health. Therefore, the use of halogen flame retardants is gradually being banned, and harmful subst...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F212/08C08F255/02C08F8/40C08G18/32C08G59/14C08G65/335C08L77/02C08L25/06C08L71/02C08L63/00C08K7/14C08K3/04
CPCC08F8/40C08G18/3889C08G59/1488C08G65/3356C08L77/02C08L2201/02C08L2201/08C08L2205/03C08F212/08C08F255/02C08L25/06C08K7/14C08K3/042C08L63/00C08L71/02
Inventor 管涌朱佳雯李庆危大福申屠烜钰郑安呐许祥
Owner EAST CHINA UNIV OF SCI & TECH
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