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Phosphorus-containing acrylate flame retardant as well as preparation method and application thereof

A technology of acrylate and flame retardant, which is applied in the field of phosphorus-containing acrylate flame retardant and its preparation, can solve problems such as easy precipitation, and achieve the effect of improving flame retardancy and compressive strength

Active Publication Date: 2020-08-04
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to provide a phosphorus-containing acrylate flame retardant and its preparation method and application, aiming at the problems that the added flame retardant is easy to precipitate, the soft foam production process needs a liquid flame retardant, and the compression strength of the soft foam is improved.
In the present invention, the phosphorus-containing acrylate flame retardant and the free radical initiator are added to the raw materials of the flexible polyurethane foam, and then heated and polymerized to form a cross-linked network after foaming, which can not only improve the flame retardancy of the flexible foam, but also solve the problem of the precipitation of the flame retardant problems, but also improve the compressive strength of the soft foam

Method used

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  • Phosphorus-containing acrylate flame retardant as well as preparation method and application thereof
  • Phosphorus-containing acrylate flame retardant as well as preparation method and application thereof
  • Phosphorus-containing acrylate flame retardant as well as preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0026] Add 45.6g of dimethyl hydroxymethylphosphonate, 47g of triethylamine and 500mL of dichloromethane into the flask, then add 33.7g of acryloyl chloride dropwise under ice-cooling, after the dropwise addition, react at room temperature for 12 hours; After washing twice with dilute hydrochloric acid and once with aqueous sodium bicarbonate solution, the organic phase was evaporated to dryness to obtain a light yellow liquid product with the following structural formula:

[0027]

Embodiment 2

[0029] Add 45.6g of dimethyl hydroxymethylphosphonate, 47g of triethylamine and 500mL of dichloromethane into the flask, then add 38.9g of methacryloyl chloride dropwise under ice-cooling, after the dropwise addition, react at room temperature for 12 hours After being washed twice with dilute hydrochloric acid and once with aqueous sodium bicarbonate solution, the organic phase was evaporated to dryness to obtain a yellow liquid product, the structural formula of which is as follows:

[0030]

Embodiment 3

[0032] Add 86g of diphenyl hydroxymethylphosphonate, 47g of triethylamine, 0.05g of p-methoxyphenol and 500mL of dichloromethane into the flask, then add 33.7g of acryloyl chloride dropwise under ice-cooling. React at room temperature for 12 hours; after washing twice with dilute hydrochloric acid and once with aqueous sodium bicarbonate solution, evaporate the organic phase to obtain a yellow liquid product with the following structural formula:

[0033]

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Abstract

The invention discloses a phosphorus-containing acrylate flame retardant as well as a preparation method and an application thereof, and the structural general formula of the phosphorus-containing acrylate flame retardant is shown in the specification, in the formula, R1 and R3 are selected from hydrogen or methyl, and R2 is selected from methyl, ethyl, propyl, butyl or phenyl. The flame retardantis liquid and is added into the polyurethane flexible foam, so that the production process of the flame retardant is not influenced. After foaming, heating is performed to polymerize the double bondsto form a cross-linked network, so that the flame retardancy of the soft foam can be improved, the flame retardant cannot be separated out of the polymer, and the compression strength of the soft foam can be improved.

Description

technical field [0001] The invention belongs to the field of flame retardant synthesis and flame retardant polymer materials, and in particular relates to a phosphorus-containing acrylate flame retardant and its preparation method and application. Background technique [0002] The open-cell structure of flexible polyurethane foam further deteriorates its flame retardancy. The oxygen index of ordinary flexible foam is only about 17%, which is a flammable material. Although additive flame retardants have the advantages of little impact on the production process, ease of use, and low cost, they are easy to precipitate in polymers, which affects the long-term use of materials. For polyurethane soft foams, liquid flame retardants are more suitable for their production process, and increasing the compression strength of soft foams is beneficial to improve the supporting capacity of soft foams as cushions, pillows, mattresses and other materials. [0003] Acrylates are easy to pol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F9/40C07F9/53C08F283/00C08F230/02C08G18/48C08G101/00
CPCC07F9/4006C07F9/4075C07F9/4084C07F9/5304C08F283/006C08G18/4829C08G2110/0083C08F230/02
Inventor 马超周峰胡伟兆汪碧波宋磊胡源
Owner UNIV OF SCI & TECH OF CHINA