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Novel flame retardant for polyolefin and preparation method of flame retardant

A flame retardant and polyolefin technology, which is applied in the field of flame retardants and can solve the problems of large amount of addition, low carbon formation, and low thermal stability.

Active Publication Date: 2021-03-05
JIANGSU JICUI ADVANCED POLYMER MATERIAL RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the phosphorus and nitrogen-based flame retardants sold in the market are added in large amounts in polyolefins, have low thermal stability, are prone to yellowing, and have low carbon-forming properties. Good flame retardant effect

Method used

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  • Novel flame retardant for polyolefin and preparation method of flame retardant
  • Novel flame retardant for polyolefin and preparation method of flame retardant
  • Novel flame retardant for polyolefin and preparation method of flame retardant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] This example provides a new type of flame retardant for polyolefin, and the structural formula of the flame retardant is:

[0027]

[0028] where m is a positive integer from 1 to 100.

Embodiment 2

[0030] A preparation method of a novel flame retardant for polyolefins of the present invention comprises the following steps: a. In mole parts, add 2 parts of phytic acid to 5 parts of water, and stir to fully dissolve;

[0031] b. 7.6 parts of diphenylmethylpiperazine are heated to melt at 90°C, and 0.8 parts of 2,6-diaminopyridine are heated to melt at 120°C;

[0032] c, in the mixture obtained in step a, dropwise step b material respectively, and stir;

[0033] d. Adjust the solution system obtained in step c with ammonia water to a pH of 6. After the dropwise addition is completed, the temperature is raised to 80 ° C and the reaction is continued for 2 h. After cooling to room temperature, the white precipitated intermediate is obtained by filtration;

[0034] e. The intermediate obtained in step d is heated to 250°C under an inert gas condition, and the reaction product is obtained after dehydration and condensation reaction for 1 h;

[0035] f. The obtained reaction pr...

Embodiment 3

[0037] A preparation method of a novel flame retardant for polyolefin of the present invention comprises the following steps:

[0038] a, in mole parts, to 10 parts of water, add 2 parts of phytic acid, stir to make it fully dissolved;

[0039] b. 8 parts of diphenylmethylpiperazine are heated to melt at 95°C, and 1 part of 2,6-diaminopyridine is heated to melt at 125°C;

[0040] c, in the mixture obtained in step a, dropwise step b material respectively, and stir;

[0041] d. Adjust the solution system obtained in step c with ammonia water to a pH of 8. After the dropwise addition is completed, the temperature is raised to 90° C. to continue the reaction for 2 h, and after cooling to room temperature, a white precipitated intermediate is obtained by filtration;

[0042] e. The intermediate obtained in step d is heated to 260° C. under an inert gas condition, and the reaction product is obtained after dehydration and condensation reaction for 1 h;

[0043] f. The obtained re...

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PUM

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Abstract

The invention discloses a novel flame retardant for polyolefin and a preparation method, and belongs to the field of flame retardants. The preparation method of the flame retardant comprises the following steps: 1, adding phytic acid and water into a reactor, conducting stirring, respectively heating and melting diphenylmethylpiperazine and 2,6-diaminopyridine, simultaneously dropwise adding the diphenylmethylpiperazine and 2,6-diaminopyridine into the reactor for reaction, separating out reactants, conducting filtering to obtain a crude product, and conducting drying to obtain an intermediate; and 2, carrying out dehydration condensation reaction on the intermediate under an inert gas condition to obtain a final product. The synthesized novel flame retardant has good stability and hydrolysis resistance, and can be used for improving the flame retardant property of polyolefin resin.

Description

technical field [0001] The invention belongs to the technical field of flame retardants, and in particular relates to a novel flame retardant for polyolefin and a preparation method thereof. Background technique [0002] Because of its abundant raw materials, low price, easy processing and excellent comprehensive properties, polyolefin is the polymer material with the largest output and the most extensive application. Among them, polyethylene and polypropylene are the most important. However, polyolefin has a carbon chain skeleton structure. After being ignited, it reacts with oxygen in the air, and the carbon chain skeleton will collapse rapidly, the chain segment structure will decompose, forming a large amount of toxic fumes and releasing heat, causing damage to people's lives and property. huge threat. In order to solve the above problems and improve the flame resistance of polyolefin materials, after more than half a century of development of flame retardant technolog...

Claims

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Application Information

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IPC IPC(8): C08G79/04C08L85/02C08L23/00
CPCC08G79/04C08L85/02C08L23/00C08L2201/02C08L2201/08
Inventor 陈荣闻辉
Owner JIANGSU JICUI ADVANCED POLYMER MATERIAL RES INST CO LTD
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