Expandable novel epoxy resin composite flame-retardant material and preparation method thereof

An epoxy resin and composite flame retardant technology, applied in the field of flame retardants, can solve problems such as complex synthetic routes, and achieve the effects of wide source of raw materials, high limiting oxygen index and thermal stability, and low cost

Active Publication Date: 2020-04-14
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent CN109880170A also discloses a new epoxy resin flame retardant material, but its flame retardant is synthesized by co-precipitation method and doping element method, and the synthesis route is relatively complicated

Method used

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  • Expandable novel epoxy resin composite flame-retardant material and preparation method thereof
  • Expandable novel epoxy resin composite flame-retardant material and preparation method thereof
  • Expandable novel epoxy resin composite flame-retardant material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The preparation of pure epoxy resin specifically comprises the steps:

[0038] Add 22.5 parts of polyetheramine to 67.5 parts of epoxy resin, stir at room temperature at a speed of 500 rpm for ten minutes, pour into a mold and pre-cure overnight at room temperature, and then cure at a constant temperature of 120 °C in a drying oven for 4 hours, remove from the mold.

[0039] Referring to Table 1, it can be seen that the oxygen index of Example 1 is only 20.4%, and there is no vertical combustion level.

[0040] See attached figure 1 with attached figure 2 , which are the thermogravimetric (left) and thermogravimetric rate (right) curves of the example in a nitrogen atmosphere. It can be seen from the thermogravimetric diagram that the thermogravimetric loss can be divided into three stages. The first stage is the evaporation of the solvent at 0°C~300°C, the second stage is the thermal decomposition of the material at 300°C~450°C, and the third stage is at 450°C~ 80...

Embodiment 2

[0042] Add the preparation of the epoxy resin composite fire-retardant material of aluminum hypophosphite separately, specifically comprise the steps:

[0043] Add 10 parts of aluminum hypophosphite to 67.5 parts of epoxy resin, stir at 500 rpm for ten minutes in a water bath at 60°C, then add 22.5 parts of polyetheramine, and stir at 500 rpm at room temperature After stirring for ten minutes, pour into the mold and pre-cure overnight at room temperature, then cure in a drying oven at a constant temperature of 120°C for 4 hours, and take it out for demoulding.

[0044] Referring to Table 1, it can be seen that the oxygen index of Example 2 is 22.6%, which is 2.4% higher than the 20.4% of Example 1, and the vertical combustion is still no grade.

[0045] See attached figure 1 , which is the thermogravimetric (left) and thermogravimetric rate (right) curves of Example 2 under a nitrogen atmosphere. It can be seen that the temperature (T 5% ) is 313 ℃, the temperature of the p...

Embodiment 3

[0047] Add the preparation of the epoxy resin composite fire-retardant material of expandable graphite separately, specifically comprise the steps:

[0048] Add 10 parts of expandable graphite to 67.5 parts of epoxy resin, stir at 500 rpm for ten minutes in a water bath at 60°C, then add 22.5 parts of polyetheramine, and stir at 500 rpm at room temperature After stirring for ten minutes, pour into the mold and pre-cure overnight at room temperature, then cure in a drying oven at a constant temperature of 120°C for 4 hours, and take it out for demoulding.

[0049] Referring to Table 1, it can be seen that the vertical combustion of Example 3 is still gradeless, and the oxygen index is 25.2%, which is 4.8% higher than the 20.4% of Example 1, and 2.6% higher than the 22.6% of Example 2. It can be seen from this Adding expandable graphite alone has a better flame retardant effect than aluminum hypophosphite.

[0050] See attached figure 1 , which is the thermogravimetric (left) ...

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Abstract

The invention discloses an expandable novel epoxy resin composite flame-retardant material and a preparation method thereof, belongs to the technical field of flame retardants, and particularly relates to an expandable novel epoxy resin composite flame-retardant material with good flame retardance, wherein the raw materials comprise, by weight, 67.5 parts of an epoxy resin, 22.5 parts of a curingagent, and 10 parts of a flame retardant, wherein the flame retardant is prepared from 0-10 parts of expandable graphite and 0-10 parts of aluminum hypophosphite. According to the invention, the preparation method is simple, easy to operate, wide in raw material source, low in cost, environmentally friendly, free of special equipment in the whole reaction process and the like, and is suitable forindustrial production; and compared with the pure epoxy resin material, the expandable novel epoxy resin composite flame-retardant material provided by the invention has high thermal stability and high oxygen index, and has wide commercial application prospect.

Description

technical field [0001] The invention relates to a novel expandable epoxy resin composite flame retardant material and a preparation method thereof, which belong to the technical field of flame retardants, and specifically relate to an expandable novel epoxy resin composite flame retardant material with good flame retardant performance. Background technique [0002] Epoxy resin has good electrical properties, mechanical properties, chemical corrosion resistance, etc., and is widely used in the fields of machinery manufacturing, electronics, aerospace, and wind power generation. However, epoxy resin is extremely flammable, with fast flame propagation speed, a lot of smoke, and fast heat release rate. This poses a potential threat to the expansion of the fire and people's escape. Therefore, it is particularly important to improve the thermal stability of epoxy resin materials, reduce the heat release rate during combustion, and improve its low resistance and smoke suppression ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08K3/32C08K9/00C08K3/04
CPCC08K3/32C08K9/00C08K3/04C08L2201/02C08L2201/08C08L63/00
Inventor 王志荣朱羽陈婷婷俞源
Owner NANJING UNIV OF TECH
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