Flame retardant with nitrogen-containing phosphonate and synthesis method of flame retardant

A technology of nitrogen phosphonate and synthesis method, applied in the field of flame retardant and its synthesis, can solve the problems of low flame retardant efficiency, large addition amount, poor durability, etc. Flammability, transfer inhibition effect

Active Publication Date: 2019-06-28
HEILONGJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the problems of large addition amount, darker color, poor durability and low flame retardant efficiency, and provides a nitrogen-containing phosphonate flame retardant and its synthesis method

Method used

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  • Flame retardant with nitrogen-containing phosphonate and synthesis method of flame retardant
  • Flame retardant with nitrogen-containing phosphonate and synthesis method of flame retardant

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specific Embodiment approach 1

[0013] Specific embodiment 1: The chemical name of a nitrogen-containing phosphonate flame retardant in this embodiment is polymethylpiperazine phosphonate, and its structural formula is:

[0014] Where n is 10-100.

specific Embodiment approach 2

[0015] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the synthesis method of the nitrogen-containing phosphonate flame retardant is specifically carried out in the following steps:

[0016] 1. After mixing and stirring dimethyl methyl phosphate, piperazine and catalyst, carry out distillation reaction, and collect fractions;

[0017] 2. Cool down after the reaction, add ethanol and stir thoroughly, separate solid and liquid, and distill the liquid phase to remove ethanol to obtain a light yellow viscous liquid product.

[0018] In this embodiment, the purpose of adding ethanol to fully stir the solid-liquid separation is to remove unreacted piperazine and catalyst.

[0019] The synthesis method of the nitrogen-containing phosphonate flame retardant described in this embodiment is realized through the following reaction process:

[0020]

specific Embodiment approach 3

[0021] Embodiment 3: The difference between this embodiment and Embodiment 2 is that the catalyst described in step 1 is sodium bisulfate. Others are the same as in the second embodiment.

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Abstract

The invention discloses a flame retardant with nitrogen-containing phosphonate and a synthesis method of the flame retardant, belongs to the field of flame retardant synthesis and particularly relatesto a flame retardant and a synthesis method thereof. The problems of large addition amount, deep color, poor durability and low flame-retarded efficiency are solved. The chemical name of the flame retardant with the nitrogen-containing phosphonate is polymethyl phosphonic acid piperazine ester; the preparation method comprises the steps that dimethyl methylphosphate is taken in a reaction container, piperazine and a catalyst are added, sufficient stirring is conducted until the mixture is dissolved, and after heating and a reaction for several hours, fraction methyl alcohol is collected; after the reaction is ended, cooling is conducted, and the product polymethyl phosphonic acid piperazine ester can be obtained. A synergistic effect exists between a nitrogen element and a phosphorus element in the flame retardant, the two ends of each flame retardant molecule contain amidogen, in the curing process, the amidogen can react with epoxy groups of epoxy resin, so that the epoxy resin obtain permanent flame retardance, and the char yield of the epoxy resin is obviously increased. The flame retardant is applied to preparation of the flame retardant with the nitrogen-containing phosphonate.

Description

technical field [0001] The invention belongs to the field of flame retardant synthesis, in particular to a flame retardant and a synthesis method thereof. Background technique [0002] Among the permanent flame retardants used in epoxy resins, although halogen-containing flame retardants have better flame retardant effects, they are gradually replaced by halogen-free flame retardants due to the generation of toxic and corrosive gases during combustion. At present, halogen-free flame retardants mainly include metal hydroxides, inorganic phosphorus-based flame retardants, organic phosphorus-based flame retardants, and nitrogen-based flame retardants. Large size, darker color, poor durability and low flame retardant efficiency, etc., the above flame retardants seriously restrict the scope of application of epoxy resins. Due to the obvious synergistic effect between phosphonate flame retardants and nitrogen, the preparation of a nitrogen-containing phosphonate flame retardant c...

Claims

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Application Information

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IPC IPC(8): C08G79/02C08L63/00C08L85/02
Inventor 展召顺王劲草张月张耀隆成晋宏魏立国吴捷刘丽来
Owner HEILONGJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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