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Epoxy resin flame retardant containing phosphorous and nitrogen and preparation method thereof

A technology of nitrogen epoxy resin and flame retardant, which is applied in the field of flame retardant and its preparation, can solve the problems of poor matrix compatibility, influence of matrix mechanical properties, easy migration, etc., and achieve convenient post-processing, good mechanical properties, and high purity high effect

Inactive Publication Date: 2017-12-22
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the poor compatibility with the matrix, the traditional additive flame retardants are easy to migrate, and will have a serious impact on the mechanical properties of the matrix

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Add 19.498g (0.1mol) of DCPPO and 100ml of chloroform into a 250ml three-necked flask equipped with a condenser tube, a nitrogen conduit, a thermometer and a magnetic stirrer, and accurately measure 22.709g (0.21mol) of o-phenylenediamine and add it to the constant pressure drop In the funnel, the dropping rate was controlled, and the dropping was completed within 4 hours, and the reaction was completed under nitrogen protection at 45°C for 6 hours. The product was filtered, washed, and then dried in a vacuum oven at 60°C for 12 hours to obtain a white solid powder.

Embodiment 2

[0027] Add 19.498g (0.1mol) of DCPPO and 100ml of chloroform as a solvent in a 250ml three-necked flask equipped with a condenser tube, a nitrogen conduit, a thermometer and a magnetic stirrer, and accurately measure 27.035 (0.25mol) of o-phenylenediamine to control the rate of addition. The dropwise addition was completed within 4 hours, and the reaction was completed under nitrogen protection at 50°C for 6 hours. The product was filtered, washed, and then dried in a vacuum oven at 60°C for 12 hours to obtain a white solid powder.

Embodiment 3

[0029] Add DCPPO 19.498g (0.1mol) in a 250ml three-necked flask equipped with a condenser, a nitrogen conduit, a thermometer and a magnetic stirrer, and 110ml of ether as a solvent, accurately measure 22.709 (0.21mol) of o-phenylenediamine, and control the rate of addition. The dropwise addition was completed within 4 hours, and the reaction was completed under nitrogen protection at 50°C for 6 hours. The product was filtered, washed, and then dried in a vacuum oven at 60°C for 12 hours to obtain a white solid powder.

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Abstract

Relating to a flame retardant and a preparation method thereof, the invention provides an epoxy resin flame retardant containing phosphorous and nitrogen and a preparation method thereof. The preparation raw materials include: phenylphosphonic dichloride and o-phenylenediamine. The preparation method of the flame retardant includes: under the introduction of an inert gas, carrying out stirring reaction on phenylphosphonic dichloride (DCPPO) and o-phenylenediamine for a period of time, and conducting filtering, washing, drying and other treatment on the product to obtain a white solid. The compound has good compatibility with epoxy resin, can be cured together with epoxy resin into a whole, has little influence on the mechanical properties of the cured product, can be used as a curing agent of epoxy resin, and also can effectively improve the flame retardance of epoxy resin. The process provided by the invention has the advantages of simple production condition, high product purity and yield, and simple post-treatment process.

Description

technical field [0001] The invention relates to a flame retardant and a preparation method thereof, in particular to a phosphorus and nitrogen-containing epoxy resin flame retardant and a preparation method thereof. Background technique [0002] Epoxy resin itself has a thermoplastic linear structure and cannot be used directly. It must be added with a curing agent to form a three-dimensional network structure before it can be used. Different types of curing agents have different uses. Epoxy resin is widely used in various fields due to its excellent bonding, anti-corrosion, molding and thermal stability. It has a big disadvantage that it is flammable. Therefore, the research on flame-retardant epoxy resin curing agent is very important. necessary. [0003] At present, the most effective epoxy resin flame retardants currently recognized on the market are halogenated flame retardants, but with the deepening of research, it is found that halogenated flame retardants will rele...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K5/5399C08L63/00C08G59/40C07F9/44
CPCC08K5/5399C07F9/4419C07F9/4476C08G59/4071C08L2201/02C08L63/00
Inventor 梁兵刘晓丽
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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