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Flame-retardant curing agent containing phosphorus and P-C key structure, preparation method of flame-retardant curing agent and flame-retardant epoxy resin with flame-retardant curing agent as raw materials

A technology of epoxy resin and curing agent, which is applied in the field of flame retardant epoxy resin, can solve the problems of easy hydrolysis, poor compatibility with epoxy resin matrix, poor thermal stability, etc., and achieve good compatibility and guarantee no Migration, durability, and high flame retardant efficiency

Inactive Publication Date: 2016-01-06
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problems of poor thermal stability, easy hydrolysis, and poor compatibility with epoxy resin matrix in existing phosphorus-containing flame retardants, and provides a flame-retardant curing agent containing phosphorus and a P-C bond structure, and its preparation Method and its flame-retardant epoxy resin as raw material

Method used

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  • Flame-retardant curing agent containing phosphorus and P-C key structure, preparation method of flame-retardant curing agent and flame-retardant epoxy resin with flame-retardant curing agent as raw materials
  • Flame-retardant curing agent containing phosphorus and P-C key structure, preparation method of flame-retardant curing agent and flame-retardant epoxy resin with flame-retardant curing agent as raw materials
  • Flame-retardant curing agent containing phosphorus and P-C key structure, preparation method of flame-retardant curing agent and flame-retardant epoxy resin with flame-retardant curing agent as raw materials

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specific Embodiment approach 1

[0028] Specific implementation mode 1: The structural formula of the flame retardant curing agent containing phosphorus and P-C bond structure in this embodiment is:

[0029] where R is

specific Embodiment approach 2

[0030] Specific embodiment two: the preparation method of the flame retardant solidifying agent containing phosphorus and P-C bond structure of this embodiment, carries out according to the following steps:

[0031] 1. Add diphenylphosphine and raw material A into a four-neck round bottom flask equipped with a spherical condenser, thermometer, mechanical stirring device, constant pressure dropping funnel and gas protection device, and heat it into the flask under nitrogen protection The substance melts completely;

[0032] 2. Then add the solvent dropwise. Under the conditions of nitrogen flow and stirring, the reactant reacts in the reflux state for 2 to 3 hours, then cools to room temperature, and removes the solvent by rotary evaporation. The obtained precipitate is washed and dried to obtain a crude product. After the product is recrystallized, a white powdery product is finally obtained.

specific Embodiment approach 3

[0033] Embodiment 3: The difference between this embodiment and Embodiment 2 is that the raw material A in step 1 is p-quinone, maleic acid or itaconic acid. Others are the same as in the second embodiment.

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Abstract

The invention relates to a flame-retardant curing agent containing phosphorus and a P-C key structure, a preparation method of the flame-retardant curing agent and flame-retardant epoxy resin with the flame-retardant curing agent as raw materials and aims at solving the problems that existing flame retardants containing phosphorus are poor in heat stability, prone to hydrolysis and bad in compatibility with epoxy resin matrixes. The flame-retardant curing agent is a flame-retardant curing agent containing phosphorus and the P-C key structure. The method includes the steps that firstly, diphenylphosphine oxide and raw materials A are added into a four-port round-bottom flask, and substances in the flask are heated to be totally fused under nitrogen protection; secondly, solvents are added, react in a backflow state and are cooled to room temperature, the solvents are removed, obtained precipitate is dried after being washed, coarse products are obtained and recrystallized, and finally white powdery products are obtained. The flame-retardant curing agent is good in heat stability, not prone to hydrolysis and good in compatibility with epoxy resin matrixes. The flame-retardant curing agent is applied to the field of flame-retardant curing agents containing phosphorus.

Description

technical field [0001] The invention relates to a flame retardant curing agent, a preparation method thereof and a flame retardant epoxy resin using the same as a raw material. Background technique [0002] Epoxy resin has excellent mechanical properties and chemical stability such as acid and alkali corrosion resistance, so it is widely used in coatings, casting, adhesives, composite materials, semiconductor sealing materials, insulating materials for electrical equipment and other fields. However, traditional Epoxy resins are very flammable, and they cannot meet some application fields that require a higher level of flame retardancy. Therefore, improving the flame retardancy of epoxy resins has been called an urgent issue and has attracted more and more attention. The traditional flame retardant method of epoxy resin is to use halogen-containing flame retardants to flame-retardant materials. Although halogen-containing flame retardants play an excellent role in flame retar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/62C08G59/42C07F9/53
Inventor 李斌许苗军张宏坤
Owner NORTHEAST FORESTRY UNIVERSITY
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