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Epoxy resin system and preparation method thereof

An epoxy resin system and epoxy resin technology, applied in the fields of chemical industry and materials, can solve the problems of difficulty in balancing mechanical properties, process operability, hardening process conditions, and poor carbon fiber infiltration effect, etc., to achieve good infiltration effect and low The effect of exothermic peak temperature and low viscosity of the system

Active Publication Date: 2018-02-27
GUANGZHOU POCHELY NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, most of the epoxy resin systems currently used in the production of drones have certain defects, such as poor infiltration effect on carbon fibers; it is difficult to balance high heat resistance and easy curing process conditions; excellent mechanical properties and excellent It is difficult to balance the operability of the process, etc. In addition, the cured product of the existing epoxy resin system is easy to yellow and powder after high temperature or direct sunlight

Method used

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  • Epoxy resin system and preparation method thereof
  • Epoxy resin system and preparation method thereof

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Embodiment 1

[0042] The preparation method of epoxy resin described in embodiment 1 may further comprise the steps:

[0043] (1) After mixing the epoxy resin and diluent, heat it to 45°C in a vacuum reactor, spray the functional additive at a spray speed of 20 g / min, and stir and react at a stirring speed of 200 r / min for 3 hours at the same time, Component A was prepared, the viscosity (25°C) was 870mpa.s, the epoxy value was 0.74, and it was a colorless and transparent liquid;

[0044](2) First, add hydrogenated m-phenylenediamine and methylcyclohexanediamine into the reactor and raise the temperature to 35°C, stir at 350r / min, then add the toughening modifier at a constant rate of 1.5kg / h In the reaction kettle, and control the maximum temperature not to exceed 75°C; then raise the temperature to 60-80°C after no obvious temperature rise, and react for 2 hours; then add the remaining alicyclic amine, and finally add polyetheramine, and keep it warm for 4 hours, Add anti-aging agent and...

Embodiment 2

[0047] The preparation method of epoxy resin described in embodiment 2, comprises the steps:

[0048] (1) After mixing the epoxy resin and diluent, heat it to 50°C in a vacuum reactor, spray the functional additive at a spray speed of 15 g / min, and stir and react at a stirring speed of 300 r / min for 3 hours, Component A was prepared, the viscosity (25°C) was 830mpa.s, the epoxy value was 0.76, and it was a colorless and transparent liquid;

[0049] (2) First, add hydrogenated m-phenylenediamine and hydrogenated 2,2-amino-4,4-diphenylmethane into the reactor and raise the temperature to 40°C, stir at 350r / min, and then add the toughening modifier with Add the constant rate of 1.5kg / h into the reaction kettle, and control the maximum temperature not to exceed 75°C; then raise the temperature to 60-80°C until there is no obvious temperature rise, and react for 2 hours; then add the remaining alicyclic amine, and finally add Polyether amine, after heat preservation reaction for 4...

Embodiment 3

[0052] The preparation method of epoxy resin described in embodiment 3, comprises the steps:

[0053] (1) After mixing the epoxy resin and diluent, heat it to 40°C in a vacuum reactor, spray the functional additive at a spray speed of 10 g / min, and stir and react at a stirring speed of 150 r / min for 2 hours, Component A was prepared, the viscosity (25°C) was 700mpa.s, the epoxy value was 0.78, and it was a colorless and transparent liquid;

[0054] (2) First, cyclohexylamine: 10% (accounting for component B by weight) and cyclohexanediamine: 7% (accounting for component B by weight) are added to the reactor and heated to 45°C, at 150r / min Stir, then add the toughening modifier into the reactor at a constant rate of 0.5kg / h, and control the maximum temperature not to exceed 75°C; then raise the temperature to 60-80°C until there is no obvious temperature rise, and react for 1h; Then add the remaining alicyclic amine, and finally add polyetheramine, after heat preservation for ...

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Abstract

The invention relates to an epoxy resin system and a preparation method thereof. The epoxy resin system comprises a component A and a component B, and the component A comprises 80-85% of epoxy resin, 14-19% of a diluent and 0.1-3% of a functional assistant; and the component B comprises 40-60% of alicyclic amine, 20-45% of polyetheramine and 10-30% of a toughening modifier, wherein the epoxy resin is one or more of bisphenol AD epoxy resin, hydrogenated bisphenol AD epoxy resin, hydrogenated bisphenol A epoxy resin and hydrogenated bisphenol F epoxy resin The epoxy resin system has a fast wetting speed and a good infiltrating effect on carbon fibers, can realize rapid solidification and good heat resistance, and has excellent technological operationality and excellent mechanical properties; and a solidified material can be baked at a high temperature or used outdoor without efflorescence or yellowing phenomena, can be used to make unmanned planes, and meets unmanned planes' performance requirements of composite materials.

Description

technical field [0001] The invention relates to the technical fields of chemical engineering and materials, in particular to an epoxy resin system and a preparation method thereof. Background technique [0002] After a long development process in the 20th century, UAVs have finally ushered in a period of rapid growth in its industrial development along with the rapid development of the electronics industry, material science, control, and communication technologies. After entering the 21st century, the research and development investment and procurement demand of drones have shown explosive growth. For example, in the 1990s in the 20th century, the total investment in the field of drones in the United States was only 3.4 billion U.S. dollars, but in 2010, this figure had reached 4.4 billion U.S. dollars, and the average annual growth rate in the past 10 years was as high as 44%. Teal Group, which specializes in market research in the aviation industry, recently predicted tha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L63/00C08L71/02C08K5/5435C08K5/5425C08K5/1515C08K5/13C08K7/14C08G59/50
Inventor 覃遵胜
Owner GUANGZHOU POCHELY NEW MATERIAL TECH CO LTD
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