Method for degrading and recycling thermosetting epoxy resin material

A technology of epoxy resin and heat recovery, applied in plastic recycling, recycling technology, etc., can solve problems such as poor wettability, weakening chemical bonds, limiting catalyst diffusion and resin degradation, achieving less by-products, high degradation efficiency, and reduced degradation and recycling cost effect

Inactive Publication Date: 2015-06-03
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the poor wettability of water and alcohol solvents to thermosetting epoxy resin, higher temperature is required to make the resin swell, which limits the diffusion of the catalyst and the degradation of the resin. , thereby weakening the chemical bonds in the resin, this technique must use a high concentration of salt solution

Method used

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  • Method for degrading and recycling thermosetting epoxy resin material
  • Method for degrading and recycling thermosetting epoxy resin material
  • Method for degrading and recycling thermosetting epoxy resin material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Mix zinc chloride with an aqueous acetic acid solution with a mass concentration of 90% acetic acid to prepare a 50ml reaction solution with a catalyst mass percentage of 40%;

[0032] (2) Add 0.5 g of the epoxy resin material synthesized in formula (1) to the reaction solution, and the epoxy resin material is immersed under the liquid surface of the reaction liquid and degraded at 100°C for 72 hours;

[0033] (3) After the reaction and cooling, add 1000ml of acetone to the degradation material and filter. The filtered solids are reinforcing fibers and catalysts, which are dried and sieved and recovered; the filtrate is evaporated to dryness to obtain resin degradation products, which are degraded by analysis The structural formula of the product is:

[0034]

Embodiment 2

[0036] (1) Mix zinc bromide and an aqueous solution of acetic acid with a mass concentration of 95% acetic acid to form a 50ml reaction solution with a catalyst mass percentage of 30%;

[0037] (2) Add 1.0g of the epoxy resin material synthesized in formula (2) to the reaction solution, the epoxy resin material is immersed under the liquid surface of the reaction liquid and degraded at 120°C for 48 hours;

[0038] (3) After the reaction and cooling, add 5000ml of tetrahydrofuran to the degraded material and filter. The filtered solids are reinforcing fibers and catalysts, which are recovered after drying and screening; the filtrate is evaporated to dryness to obtain resin degradation products, which are degraded by analysis The structural formula of the product is:

[0039]

[0040] Among them: m=1-5, n=2-4

Embodiment 3

[0042] (1) Mix aluminum chloride with an acetic acid aqueous solution with a mass concentration of 99% acetic acid to prepare a 50ml reaction solution with a catalyst mass percentage of 10%;

[0043] (2) Add 1.5g of the epoxy resin material synthesized in formula (3) to the reaction solution, the epoxy resin material is immersed under the liquid surface of the reaction liquid and degraded at 140°C for 36 hours;

[0044] (3) After the reaction and cooling, add 500ml of chloroform to the degradation material and filter. The filtered solids are reinforcing fibers and catalysts, which are dried and sieved and recovered; the filtrate is evaporated to dryness to obtain resin degradation products, which are degraded by analysis The structural formula of the product is:

[0045]

[0046] Among them: m=1-5, n=2-4

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PUM

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Abstract

The invention discloses a method for degrading and recycling a thermosetting epoxy resin material. The method comprises the following steps: adding a catalyst into a solvent to prepare a reaction solution, wherein the solvent is a low-carbon organic acid or a mixed solution of a low-carbon organic acid and water; dipping epoxy resin material in the reaction solution, and degrading at 100-280 DEG C for 10min-72min; adding a separating agent to the reaction solution obtained after degradation so as to separate inorganic packing out of the catalyst and the resin, filtering, and drying and recycling the solid; and drying filtrate by distillation to obtain a resin degradation product. The method has the advantages of high efficiency and high selectivity.

Description

Technical field [0001] The invention relates to a method for degrading and recycling thermosetting epoxy resin materials. technical background [0002] Epoxy resin materials are widely used in many fields such as aerospace, electronics and electricity, transportation and daily life due to their excellent properties such as stable physical and chemical properties, light weight, and electrical and thermal insulation. Their demand is rising rapidly, especially those made with carbon fiber Composite materials, excellent performance, application areas covering military and civilian use. However, with the continuous production and application of epoxy resin materials, waste materials are also increasing day by day, bringing heavy environmental pressure. Degrading epoxy resin materials under relatively mild conditions can not only relieve environmental pressure and reduce industry pollution, but also recycle carbon fiber and reduce product costs, which has important economic significan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J11/26
CPCY02W30/62
Inventor 邓天昇王玉琪侯相林
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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