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Preparation method of halogen-free flame retardant

A technology of flame retardant and inorganic phosphate, which is applied in the field of flame retardant materials, can solve the problems of increasing fire hazards and other personal hazards, and achieve the effects of green production, short production cycle, char formation and comprehensive performance

Active Publication Date: 2020-08-28
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The flame retardant effect of phosphorus-based flame retardants is mainly reflected in the decomposition stage of polymers in the early stage of fire, because it can promote the dehydration and carbonization of polymers, thereby reducing the amount of combustible gases produced by thermal decomposition of polymers, and the generated charcoal The layer can also isolate the outer oxygen and heat, but the phosphorus flame retardant will produce a lot of smoke during the flame retardant process, which may increase the risk of personal danger in the fire

Method used

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  • Preparation method of halogen-free flame retardant
  • Preparation method of halogen-free flame retardant
  • Preparation method of halogen-free flame retardant

Examples

Experimental program
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Effect test

Embodiment 1

[0033] A kind of preparation method of flame retardant, the molar ratio is 1:0.5 diethanolamine and formaldehyde solution are mixed and added in the flask, and with 10wt%Na 2 CO 3 Adjust the pH of the aqueous solution to 8±0.5, heat the oil bath to 80°C and keep it warm for 1.5h, then add 100ml of deionized water and diammonium hydrogen phosphate and urea with a molar ratio of 2:4 to the above solution, raise the temperature to 140°C and keep it warm After 5 hours, it was naturally cooled to room temperature to obtain a light yellow solution, which was precipitated with ethanol and washed to obtain a white solid, which was dried to obtain a flame retardant.

Embodiment 2

[0035] A kind of preparation method of flame retardant, the molar ratio is 1:0.5 diethanolamine and formaldehyde solution are mixed and added in the flask, and with 10wt%Na 2 CO 3 Adjust the pH of the aqueous solution to 9±0.5, heat the oil bath to 80°C and keep it warm for 1.5h, then add 100ml of deionized water and diammonium hydrogen phosphate and urea with a molar ratio of 2:4 to the above solution, raise the temperature to 150°C and keep it warm After 5 hours, it was naturally cooled to room temperature to obtain a light yellow solution, which was precipitated with ethanol and washed to obtain a white solid, which was dried to obtain a flame retardant.

Embodiment 3

[0037] A kind of preparation method of flame retardant, the molar ratio is 1:0.5 diethanolamine and formaldehyde solution are mixed and added in the flask, and with 10wt%Na 2 CO 3 Adjust the pH of the aqueous solution to 10±0.5, heat the oil bath to 80°C and keep it warm for 1.5h, then add 100ml of deionized water and diammonium hydrogen phosphate and urea with a molar ratio of 2:5 to the above solution, raise the temperature to 160°C and keep it warm After 6 hours, it was naturally cooled to room temperature to obtain a light yellow solution, which was precipitated with ethanol and washed to obtain a white solid, which was dried to obtain a flame retardant.

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Abstract

The invention relates to a halogen-free flame retardant and a preparation method thereof. The preparation method comprises the following steps: reacting diethanolamine with diammonium hydrogen phosphate to prepare a flame retardant; the structural formula is described in the specification. The preparation method has the advantages of easily available raw materials, simple and feasible process, short flow, short production period, safe production operation and the like, and the finally prepared flame retardant has the advantages of high thermal stability, good flame retardant property, good solubility, high char forming property and the like and has excellent popularization value.

Description

technical field [0001] The invention belongs to the field of flame retardant materials, and relates to a halogen-free flame retardant and a preparation method thereof, in particular to a novel halogen-free flame retardant with coexistence of N / P elements prepared from diethanolamine and diammonium hydrogen phosphate as raw materials and a preparation method thereof . Background technique [0002] In recent years, with the increasing depletion of petroleum resources, people have gradually turned their attention to renewable polymer materials, and cellulose is a widely available and biodegradable green polymer material that can be used to prepare packaging films And functional materials to solve the problem of environmental pollution. However, the cellulose material itself is extremely flammable, and it will cause large economic losses and personal safety in the event of a fire. Therefore, the flame-retardant modification of it is a prerequisite for the wide application of ce...

Claims

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Application Information

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IPC IPC(8): C07F9/09C09K21/12
CPCC07F9/091C09K21/12
Inventor 吴敏张同玲黄勇
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI