Epoxy resin flame-retardation composition and preparation method thereof

A technology of flame retardant composition and epoxy resin, which is applied in the field of flame retardants, can solve the problems of low thermal stability, difficult processing, easy hydrolysis, etc., and achieve the effects of high thermal stability, difficult migration, and easy operation

Inactive Publication Date: 2016-12-21
GUIZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention provides a novel intumescent epoxy resin flame retardant composition and its preparation method, which solves the problems of low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Heat 92g of bisphenol A epoxy resin to melt it, remove the bubbles by vacuuming at 90°C, then add 8g of m-phenylenediamine curing agent, stir quickly and evenly.

[0024] After the resin becomes transparent, pour it into a self-made polytetrafluoroethylene mold of a specific size, cure it at room temperature for 1 hour, then place it in an oven to cure it at 80°C for 3 hours, then raise the temperature to 100°C and cure it for 2 hours, and finally cure it at 120°C After 3 hours, the obtained flame-retardant composite material was trimmed into required specimens for performance testing after being completely cured.

[0025] Composition 1 has an oxygen index of 19.8%, a UL-94 vertical combustion N.R grade, an initial decomposition temperature of 357.79°C, a maximum decomposition temperature of 398.61°C, a carbon residue of only 15.02% at 700°C, and a peak heat release rate of 813.74 kW / m 2 , with a total heat release rate of 54.0 MJ m -2 , the effective heat of combusti...

Embodiment 2

[0027] Mix 1.67g of PBPP and 3.33g of APP evenly, heat 87g of bisphenol A epoxy resin to melt it, then add the evenly mixed compound intumescent flame retardant, after stirring evenly, remove the bubbles by vacuuming at 90°C, Then add 8g of m-phenylenediamine curing agent, stir quickly and evenly, and the preparation of composition 2 is completed.

[0028] After the composition 2 becomes transparent, pour it into a self-made polytetrafluoroethylene mold of a specific size, cure it at room temperature for 1 hour, then place it in an oven to cure it at 80°C for 3 hours, then raise the temperature to 100°C and cure it for 2 hours, and finally cure it at 120°C After curing for 3 hours, after complete curing, the obtained flame-retardant composite material was trimmed into required specimens for performance testing.

[0029] Compared with composition 1, the flame retardancy and thermal performance of the composite material are improved. The oxygen index of composition 2 is 28.8%, t...

Embodiment 3

[0031] Mix 3.33g of PBPP and 6.67g of APP evenly, heat 82g of bisphenol A epoxy resin to melt it, then add the evenly mixed compound intumescent flame retardant, after stirring evenly, remove the bubbles by vacuuming at 90°C, Then add 8g of m-phenylenediamine curing agent, stir quickly and evenly, and the preparation of composition 3 is completed.

[0032] After the composition 3 becomes transparent, pour it into a self-made polytetrafluoroethylene mold of a specific size, cure it at room temperature for 1 hour, then place it in an oven to cure it at 80°C for 3 hours, then raise the temperature to 100°C and cure it for 2 hours, and finally cure it at 120°C After curing for 3 hours, after complete curing, the obtained flame-retardant composite material was trimmed into required specimens for performance testing.

[0033]Compared with composition 1, the flame retardancy and thermal performance of the composite material have been improved. The oxygen index of composition 3 is 29....

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Abstract

The invention discloses an epoxy resin flame-retardation composition and a preparation method thereof, belonging to the field of flame-retardation substances. The composition comprises, by mass, 75 to 90 parts of epoxy resin, 5 to 15 parts of a curing agent and 5 to 10 parts of a fire retardant, summing to 100 parts, wherein the fire retardant is a rational compound of poly(bisphenoxy)biphenol phosphorate (PBPP) and ammonium polyphosphate (APP). The fire retardant in the composition is high-efficiency halogen-free compound intumescent flame retardant, and overcomes the disadvantages of generation of heavy smoke and a great number of droplets in combustion of halogen fire retardants and the problem that a great addition amount of an inorganic fire retardant leads to changing of the mechanical properties of a material; the epoxy resin flame-retardation composition overcomes the problems of low heat stability, proneness to hydrolysis, difficulty in processing and proneness to migration in a matrix of conventional phosphorus-containing fire retardants, realizes synergistic flame retardation of multiple elements such as elemental nitrogen and elemental phosphorus, and has high flame retardation efficiency; and the preparation method for the epoxy resin flame-retardation composition is simple.

Description

technical field [0001] The invention relates to the field of flame retardants, in particular to an epoxy resin flame retardant composition and a preparation method thereof. The halogen-free intumescent flame retardant is a reasonable compound of a new type of organophosphorus flame retardant PBPP and APP. Background technique [0002] Polymer materials have excellent comprehensive properties and are widely used in aerospace, electronic appliances, automobile industry and other fields, but the flammability of polymer materials and the release of toxic gases and other hazards hinder their wider application. Flame retardants are a class of functional additives that can impart flame retardancy to polymer materials. Halogenated flame retardants, especially bromine-containing flame retardants, have been widely used due to their high flame retardant efficiency and low price. However, when halogenated flame retardants are thermally cracked or burned, a large amount of dense smoke a...

Claims

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Application Information

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IPC IPC(8): C08L63/00C08L63/04C08L85/02C08K3/32C08G79/04C08G59/50
CPCC08L63/00C08G59/5033C08G59/504C08G79/04C08L63/04C08L2201/02C08L2201/08C08L2201/22
Inventor 班大明来方张永航赵欧龚维尹晓刚付海
Owner GUIZHOU NORMAL UNIVERSITY
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