Whitened red phosphorus with high flame-retardant efficiency and preparation method of whitened red phosphorus

A high-efficiency, red phosphorus technology, applied in chemical instruments and methods, compositions for inhibiting chemical changes, etc., can solve the problems of easy moisture absorption, high production cost, easy oxidation, etc., and achieve high flame retardant efficiency and oxidation resistance. Good, small addition effect

Active Publication Date: 2018-05-01
CHENGDU TEXTILE COLLEGE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] As a flame retardant, red phosphorus has the advantages of high efficiency, smoke suppression, and low toxicity, but at the same time it also has: easy to absorb moisture, easy to oxidize, and easy to release highly toxic gas PH 3 , low ignition point and many other disadvantages; therefore red phosphorus needs to be coated when used as a flame retardant
Coating red phosphorus can solve the above disadvantages to a large extent, but its color is still dark, which greatly limits the application of red phosphorus
[0003] In order to solve this problem, although the whiteness red phosphorus provided in the prior art can improve the whiteness of red phosphorus, it often has the disadvantages of complex preparation process and high production cost, but so far few manufacturers can achieve whiteness. Industrial Production of Red Phosphorus

Method used

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  • Whitened red phosphorus with high flame-retardant efficiency and preparation method of whitened red phosphorus
  • Whitened red phosphorus with high flame-retardant efficiency and preparation method of whitened red phosphorus

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preparation example Construction

[0023] The preparation method of the whiteness red phosphorus with high flame retardant efficiency provided by the embodiments of the present invention comprises:

[0024] (1) adding into water and accounting for water quality is 1% penetrating agent and emulsifier to form the first solution, adding and accounting for water quality is 50~80% red phosphorus and accounting for red phosphorus quality is 40%~80% in the first solution % aluminum salt to form a second solution, and the second solution was heated to 90° C. to prepare an emulsified dispersion system of red phosphorus and aluminum salt.

[0025] Among them, as preferably, the penetrating agent includes fatty alcohol polyoxyethylene ether; fatty alcohol polyoxyethylene ether is the most important type of nonionic surfactant, and the ether bond in its molecule is not easy to be destroyed by acid and alkali, so the stability Higher, better water solubility, electrolyte resistance, easy biodegradation, small foam; emulsifi...

Embodiment 1

[0039] This embodiment provides a preparation method of whiteness red phosphorus with high flame retardant efficiency, comprising the following preparation steps:

[0040] (1) Take 300ml of water in a 2L three-necked flask, add 2g of fatty alcohol polyoxyethylene ether and 1g of sodium dodecylbenzenesulfonate to it, disperse at high speed and add 150g of red phosphorus and 60g of aluminum chloride, heated to 90°C to obtain an emulsified dispersion system of red phosphorus and aluminum chloride;

[0041] (2) Keep 90°C and shear dispersion, and dissolve 78g of sodium hypophosphite in 200g of water to form a sodium hypophosphite solution, slowly drop the formed sodium hypophosphite solution into the emulsified dispersion system for 2 hours to react to form a third solution, and Obtain the first layer of AHP-coated red phosphorus;

[0042] (3) solution is cooled to 50 ℃, and the aluminum sulfate octadecahydrate of 225g is added in water and form concentration is the aluminum sulf...

Embodiment 2

[0046] This embodiment provides a preparation method of whiteness red phosphorus with high flame retardant efficiency, comprising the following preparation steps:

[0047] (1) Take 300ml of water in a 2L three-necked flask, add 1g of fatty alcohol polyoxyethylene ether and 2g of sodium dodecylbenzenesulfonate to it, disperse at high speed and add 240g of red phosphorus and 192g of aluminum chloride, heated to 90°C to obtain an emulsified dispersion system of red phosphorus and aluminum chloride;

[0048] (2) Keep 90°C and shear dispersion, and dissolve 288g of sodium hypophosphite in 400g of water to form a sodium hypophosphite solution, slowly drop the resulting sodium hypophosphite solution into the emulsified dispersion system and react for 2h to form a third solution, and Obtain the first layer of AHP-coated red phosphorus;

[0049] (3) solution is cooled to 50 ℃, and the aluminum sulfate octadecahydrate of 816g is added in water and form concentration is the aluminum sul...

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Abstract

The invention relates to the technical field of modification of flame retardant, and provides whitened red phosphorus with high flame-retardant efficiency and a preparation method of the whitened redphosphorus. The preparation method comprises the steps of: adding penetrant and emulsifier into water to form a first solution, adding red phosphorus and an aluminum salt into the first solution to form a second solution, heating the second solution to prepare an emulsifying dispersion system, dissolving sodium hypophosphite in water to obtain a sodium hypophosphite solution, and adding the sodiumhypophosphite solution into the emulsifying dispersion system so as to obtain a third solution and prepare a first coating layer at the moment; adding aluminum sulfate octadecahydrate into water to obtain an aluminum sulfate solution, adding sodium carbonate decahydrate into water to form a sodium carbonate solution, adding the aluminum sulfate solution and sodium carbonate solution into the third solution to form a fourth solution, and conducting aging to obtain a second coating layer; adding a formaldehyde solution into melamine to obtain a melamine-formaldehyde resin prepolymer; and addingrutile titanium dioxide and the melamine-formaldehyde resin prepolymer into the fourth solution to form a fifth solution to obtain the whitened coated red phosphorus. The whitened red phosphorus hasa low addition amount, high flame-retardant efficiency, high whiteness, good moisture absorption and good oxidation resistance.

Description

technical field [0001] The invention belongs to the technical field of flame retardant modification, and in particular relates to whiteness red phosphorus with high flame retardant efficiency and a preparation method thereof. Background technique [0002] As a flame retardant, red phosphorus has the advantages of high efficiency, smoke suppression, and low toxicity, but at the same time it also has: easy to absorb moisture, easy to oxidize, and easy to release highly toxic gas PH 3 , low ignition point and many other disadvantages; therefore red phosphorus needs to be coated when used as a flame retardant. Coating red phosphorus can solve the above disadvantages to a large extent, but its color is still dark, which greatly limits the application of red phosphorus. [0003] In order to solve this problem, although the whiteness red phosphorus provided in the prior art can improve the whiteness of red phosphorus, it often has the disadvantages of complex preparation process a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K21/04C09K15/30
CPCC09K15/30C09K21/04
Inventor 陈荣义黄剑袁明强何杰
Owner CHENGDU TEXTILE COLLEGE
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