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Flame-retardant benzoxazine resin and preparation method thereof

A benzoxazine and flame-retardant technology, which is applied in the field of flame-retardant benzoxazine resin and its preparation, can solve complex problems and achieve the effects of easy operation, heat resistance maintenance, and good compatibility

Inactive Publication Date: 2014-06-04
XIAMEN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of reactive flame retardant method makes the molecular chain contain flame retardant elements or groups, which can avoid the precipitation of the flame re...

Method used

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  • Flame-retardant benzoxazine resin and preparation method thereof
  • Flame-retardant benzoxazine resin and preparation method thereof
  • Flame-retardant benzoxazine resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Take 100 parts of benzoxazine matrix resin, add 1 part of ammonium polyphosphate and stir evenly, then raise the temperature to 110°C and stir for 120 minutes to fully mix the molten resin and ammonium polyphosphate, cool to room temperature, and obtain dry flame-retardant benzoxazine Oxazine resins.

[0035] The above-mentioned dry-process flame-retardant benzoxazine resin is degassed in vacuum at 125°C, and the temperature is 150±5°C / 1h+160±5°C / 1h+170±5°C / 1h+180±5°C / 2h+200± The cast body was prepared by 5°C / 2h curing process, and its oxygen index was measured to be 32.5.

Embodiment 2

[0037] Take 100 parts of benzoxazine matrix resin, add 10 parts of ammonium polyphosphate and stir evenly, then raise the temperature to 135°C and stir for 3 minutes to fully mix the molten resin and ammonium polyphosphate, cool to room temperature, and obtain dry flame-retardant benzoxazine Oxazine resins. The above-mentioned dry-process flame-retardant benzoxazine resin is degassed in vacuum at 125°C, and the temperature is 150±5°C / 1h+160±5°C / 1h+170±5°C / 1h+180±5°C / 2h+200± The cast body was prepared by 5℃ / 2h curing process, and its oxygen index was measured to be 36.5.

Embodiment 3

[0039] Take 100 parts of benzoxazine matrix resin, add 20 parts of ammonium polyphosphate and stir evenly, then raise the temperature to 120°C and stir for 40 minutes to fully mix the molten resin and ammonium polyphosphate, cool to room temperature, and obtain dry flame-retardant benzoxazine Oxazine resins. The above-mentioned dry-process flame-retardant benzoxazine resin is degassed in vacuum at 125°C, and the temperature is 150±5°C / 1h+160±5°C / 1h+170±5°C / 1h+180±5°C / 2h+200± The cast body was prepared by 5℃ / 2h curing process, and its oxygen index was measured to be 40.3.

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Abstract

The invention relates to thermosetting resin and provides flame-retardant benzoxazine resin which is good in flame retardancy, high in heat resistance and high in compatibility of a flame-retardant modifier and a resin matrix, and a preparation method thereof. The flame-retardant benzoxazine resin consists of the following components by mass: 100 parts of benzoxazine matrix resin, 1-40 parts of ammonium polyphosphate and 0-150 parts of a solvent. The dry preparation method comprises the steps of adding the ammonium polyphosphate into the benzoxazine matrix resin, uniformly stirring, performing pre-polymerization, and cooling to room temperature to obtain the flame-retardant benzoxazine resin. The flame-retardant benzoxazine resin prepared by the dry method can be used for an adhesive, composite material matrix resin and the like. The wet preparation method comprises the steps of adding the solvent into the benzoxazine matrix resin, uniformly stirring, adding the ammonium polyphosphate, and uniformly stirring again to obtain the flame-retardant benzoxazine resin. The flame-retardant benzoxazine resin prepared by the wet method can be used for wet-preparation of fiber prepregs and the like.

Description

technical field [0001] The invention relates to a thermosetting resin, in particular to a flame-retardant benzoxazine resin and a preparation method thereof. Background technique [0002] Thermosetting resins and their composite materials are widely used in aerospace, automobiles, electronic appliances, construction and other industrial fields due to their excellent dimensional stability, rigidity and heat resistance. Therefore, the flame retardant modification of resins has been extensively studied in recent years. [0003] Epoxy resin and bismaleimide resin are commonly used high-performance thermosetting resin matrices. Epoxy resin has good thermal stability and dielectric properties, and bismaleimide resin has high temperature resistance and chemical resistance. , radiation resistance and excellent mechanical properties, but epoxy resin is flammable, and the oxygen index usually does not exceed 25 (Levchik, S.V.; Weil, E.D., Thermal decomposition, combustion and flame‐r...

Claims

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Application Information

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IPC IPC(8): C08L79/04C08K3/32
CPCC08K3/32C08K2003/323C08L2201/02C08L79/04
Inventor 胡晓兰兰茜刘刚李伟东
Owner XIAMEN UNIV
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