Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method for brominated polyphenyl ether

A technology of brominated polyphenylene ether and brominated agent, which is applied in the field of preparation of brominated polyphenylene ether, can solve the problems of high energy consumption, difficulty in guaranteeing the purity of brominated polyphenylene ether, low effect and conversion rate, etc. Achieve the effect of high product quality, low cost and easy control

Active Publication Date: 2016-12-07
WEIFANG YUCHENG CHEM
View PDF5 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, most of the existing methods for preparing brominated polyphenylene ethers are consistent with the methods for preparing polyphenylene ethers, the effect and conversion rate are relatively low, and the energy consumption is relatively high. The purity of ether is also difficult to guarantee

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] a. Melting 94 parts of phenol at a temperature of 45° C. to obtain molten phenol;

[0029] b. Add 1110g of tetraethylammonium bromide and 800g of dichloroethane into the container, heat up and stir to obtain a homogeneous solution, then add molten phenol into the homogeneous solution at a temperature of 45°C, and keep the temperature constant Treat for 3 hours, the constant temperature is 60°C, and react to obtain a tribromophenol solution;

[0030] c. Stir the tribromophenol solution, and slowly add sodium methoxide solution into the tribromophenol solution, then add 600g of water to dilute, adjust the pH to 9, and react for 1h at a temperature of 60°C to obtain sodium tribromophenolate solution;

[0031] d. Lower the temperature of the sodium tribromophenolate solution in step c to 40°C, then add 2g of tetraethylammonium bromide, 5g of cuprous chloride, and 2g of azobisisobutyronitrile, and carry out polymerization reaction at 60°C for 5h, After the reaction was fin...

Embodiment 2

[0035] a. Melting 94 parts of phenol at a temperature of 50° C. to obtain molten phenol;

[0036] b. Add 1110g of tetraethylammonium bromide and 800g of dichloroethane into the container, heat up and stir to obtain a homogeneous solution, then add molten phenol into the homogeneous solution at a temperature of 50°C, and keep the temperature constant Treat for 3 hours, the constant temperature is 65°C, and react to obtain a tribromophenol solution;

[0037] c. Stir the tribromophenol solution, and slowly add sodium methoxide solution into the tribromophenol solution, then add 600g of water to dilute, adjust the pH to 9, and react for 1 hour at a temperature of 65°C to obtain sodium tribromophenolate solution;

[0038] d. Cool the sodium tribromophenolate solution in step c to 50°C, then add 2g of tetraethylammonium bromide, 5g of cuprous chloride, and 2g of azobisisobutyronitrile, and carry out polymerization at 60°C for 5h, After the reaction was finished, the layers were le...

Embodiment 3

[0042] a. Melting 94 parts of phenol at a temperature of 50° C. to obtain molten phenol;

[0043] b. Add 1110g of tetraethylammonium bromide and 800g of dichloroethane into the container, heat up and stir to obtain a homogeneous solution, then add molten phenol into the homogeneous solution at a temperature of 55°C, and keep the temperature constant Treat for 5 hours, the constant temperature is 70°C, and react to obtain a tribromophenol solution;

[0044]c. Stir the tribromophenol solution, and slowly add sodium methoxide solution into the tribromophenol solution, then add 600g of water to dilute, adjust the pH to 9, and react for 1h at a temperature of 70°C to obtain sodium tribromophenolate solution;

[0045] d. Lower the temperature of the sodium tribromophenolate solution in step c to 65°C, then add 2g of tetraethylammonium bromide, 5g of cuprous chloride, and 2g of azobisisobutyronitrile, and carry out polymerization reaction at 60°C for 5h, After the reaction was fini...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention belongs to the technical field of organic synthesis, and relates to a one-pot preparation technology of performing benzene ring brominating, polymerization and secondary brominating by taking phenol as a raw material, in particular to a preparation method for brominated polyphenyl ether. The preparation method comprises the following steps: melting the phenol at 45 to 60 DEG C, adding the molten phenol into an organic solvent containing a brominating agent to prepare tribromo phenol, adding alkali liquor into an organic phase, adding a catalyst and an initiator for polymerization reaction, performing demixing, drying an organic layer, adding a catalyst, and adding dropwise the brominating agent to prepare a brominated polyphenyl ether product. According to the preparation method, the brominated polyphenyl ether is prepared from the phenol serving as a starting raw material by continuous reaction in the same reaction system, and is high in conversion rate and product quality, low in cost and environment-friendly.

Description

technical field [0001] The invention belongs to the technical field of organic synthesis, and relates to a one-pot preparation technology of benzene ring bromination, polymerization, and secondary bromination using phenol as a raw material, in particular to a preparation method of brominated polyphenylene ether. Background technique [0002] Brominated polyphenylene ether is a new, broad-spectrum, efficient and environmentally friendly additive flame retardant, which does not produce toxic polybrominated dibenzodioxanes (PBDO) and polybrominated di Benzofuran (PBDF), the flame-retardant material it uses fully meets the requirements of the European regulations on dioxins, and does not cause harm to the environment. It has high bromine content, good thermal stability, good anti-ultraviolet performance, and lower exudation than other brominated flame retardants; it is especially suitable for flame retardant of high-end materials such as computers, fax machines, telephones, copi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/48C08G65/38
CPCC08G65/38C08G65/485
Inventor 吴多坤张国强秦善宝
Owner WEIFANG YUCHENG CHEM