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Preparation method of low-density high-foaming-rate epoxy resin microporous material

A technology of epoxy resin and microporous materials, which is applied in the field of preparation of low-density and high-magnification epoxy resin microporous materials, can solve the problems of low expansion ratio of foaming materials and high foam density, and achieve good compatibility and nucleation The effect of large number of points and good chain movement

Active Publication Date: 2019-07-19
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Most of the above-mentioned methods for preparing epoxy resin foam materials adopt the chemical foaming method, which reduces the density of epoxy materials to a certain extent, but the cell size of the prepared epoxy resin foam material is greater than 100 μm, and the number of cells is less than 10 μm. 6 piece / cm 3 , foam density greater than 0.2g / cm 3 ; Although the cell size and cell density of the epoxy microcellular material prepared by the physical foaming agent meet the requirements of the microcellular material, the expansion ratio of the foam material is low and the foam density is high

Method used

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  • Preparation method of low-density high-foaming-rate epoxy resin microporous material
  • Preparation method of low-density high-foaming-rate epoxy resin microporous material
  • Preparation method of low-density high-foaming-rate epoxy resin microporous material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Step 1. Add M-2070 polyetheramine and 3-glycidyloxypropyl trimethylsiloxane to 340g of absolute ethanol at a mass ratio of 10:1, and react under magnetic stirring conditions at 46°C After 10 hours, the reactant solution was dried to obtain a yellow waxy viscous fluid, and the sample was marked as A;

[0027]Step 2, add bisphenol A epoxy resin, hyperbranched epoxy resin and 2-ethyl-4-methylimidazole into dichloromethane according to the mass ratio of 90:10:4.54, and turn on the magnetic stirrer at 500 rpm / min was stirred for 6 hours to obtain a mixed solution, and the resulting sample was marked as B;

[0028] Step 3. The two samples of A and B are added to the mixed solution in step 2 according to the mass ratio of 1:100, stirred magnetically for 5 hours, and dried in a vacuum oven at 35°C to obtain epoxy resin powder. The obtained sample is marked as C;

[0029] Step 4. Place sample C in a hot press, heat press at 125°C, 10MPa pressure and 8 hours, and then naturall...

Embodiment 2

[0034] Step 1. Add M-2070 polyetheramine and 3-glycidyloxypropyl trimethylsiloxane into 300g of absolute ethanol at a mass ratio of 9:1, and react under magnetic stirring conditions at 45°C After 15 hours, the reactant solution was dried to obtain a yellow waxy viscous fluid, and the sample was marked as A;

[0035] Step 2. Add bisphenol A epoxy resin, hyperbranched epoxy resin and 2-ethyl-4-methylimidazole into dichloromethane according to the mass ratio of 90:10:4.54, and turn on the magnetic stirrer at 600 rpm / min was stirred for 5 hours to obtain a mixed solution, and the resulting sample was marked as B;

[0036] Step 3. Add A and A samples into the mixed solution in step 2 according to the mass ratio of 3:100, stir magnetically for 4 hours, and dry the mixed solution in a vacuum oven at 31°C to obtain epoxy resin powder , the obtained sample is marked as C;

[0037] Step 4. Place sample C in a hot press, heat press under the conditions of 100°C temperature, 20MPa pres...

Embodiment 3

[0042] Step 1. Add M-2070 polyetheramine and 3-glycidyloxypropyl trimethylsiloxane into 350g of absolute ethanol at a mass ratio of 8:1, and react under magnetic stirring conditions at 50°C After 14 hours, the reactant solution was dried to obtain a yellow waxy viscous fluid, and the sample was marked as A;

[0043] Step 2. Add bisphenol A epoxy resin, hyperbranched epoxy resin and 2-ethyl-4-methylimidazole into dichloromethane according to the mass ratio of 90:10:4.54, and turn on the magnetic stirrer at 700 rpm The rotating speed of / min was stirred for 4 hours to obtain the mixed solution, and the obtained sample was marked as B;

[0044] Step 3: Add A and B samples into the mixed solution in step 2 according to the mass ratio of 5:100, add A sample to the mixed solution in step 2, stir the mixed solution for 3 hours, and dry the mixed solution in a vacuum oven at 33°C to obtain epoxy resin powder , the obtained sample is marked as C;

[0045] Step 4. Put the sample C und...

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Abstract

The invention discloses a preparation method of a low-density high-foaming-rate epoxy resin microporous material, and the method is used for solving the technical problems of low expansion magnification and high foam density of an epoxy resin microporous material prepared by an existing preparation method of an epoxy resin microporous material. According to the technical scheme, bisphenol A epoxyresin and hyperbranched epoxy resin are used as basic materials, polyether amine and 3-glycidyl oxypropyl trimethyl siloxane reactants are used as modifiers, and 2-ethyl-4-methylimidazole is taken asa curing agent, so that the low-density high-foaming-ratio epoxy resin microporous material with a uniform structure and a microporous structure is prepared by mixing the raw materials through a solvent method, carrying out hot-pressing curing molding, carrying out supercritical CO2 gas saturation in a high-pressure kettle, and carrying out subsequent heating and foaming.

Description

technical field [0001] The invention relates to a method for preparing an epoxy resin microporous material, in particular to a method for preparing a low-density and high-magnification epoxy resin microporous material. Background technique [0002] Microporous polymer refers to cell size 0.1 ~ 10μm, cell density 10 9 ~10 14 piece / cm 3 foamed polymer material. Microporous polymers have the characteristics of light weight, impact resistance, fatigue resistance, heat insulation, noise reduction, and environmental protection, and are the main direction for the development of polymer foam materials in the future. Epoxy resins have excellent mechanical properties, heat resistance and process properties, and are widely used as adhesives, composite material substrates, potting materials, coatings, etc. [0003] At present, the preparation methods of epoxy resin foam materials are mainly concentrated on the chemical foaming method. The epoxy resin foam materials prepared by this ...

Claims

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Application Information

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IPC IPC(8): C08L63/00C08L71/00C08J9/12C08G59/50
CPCC08G59/5073C08J9/0061C08J9/122C08J2203/06C08J2203/08C08J2363/00C08J2400/202C08J2463/00C08J2471/00
Inventor 张广成樊勋史学涛高强秦建彬冯云杰
Owner NORTHWESTERN POLYTECHNICAL UNIV
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