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Preparation method of modified epoxy resin emulsion

An epoxy resin emulsion, epoxy resin technology, applied in textile and papermaking, fiber processing, carbon fiber and other directions, can solve the problem of carbon fiber composite material thermodynamic properties not meeting the requirements and other problems, achieve easy operation, simple preparation process, use amount less effect

Inactive Publication Date: 2016-08-17
ZHONGJIAN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the inverse emulsification method, the selection of emulsifier is very important, otherwise the amount of emulsifier is too large, resulting in the thermodynamic properties of carbon fiber composite materials not meeting the requirements

Method used

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  • Preparation method of modified epoxy resin emulsion

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Comparison scheme
Effect test

Embodiment 1

[0021] A preparation method for modified epoxy resin emulsion, comprising the following steps:

[0022] 1) Introducing hydrophilic groups into epoxy resin

[0023] First put epoxy resin E12 and epoxy resin E51 into the reaction kettle with a molar ratio of 1:2, add acetone solvent, heat to 75°C, and slowly drop diethanolamine into the reaction kettle, diethanolamine and epoxy resin E12+ ring The molar ratio of the sum of the oxygen resins E51 is 0.5-1. Keep this temperature 90min, after reaction finishes, remove acetone solvent and obtain modified hydrophilic epoxy resin;

[0024] 2) Preparation of modified epoxy resin emulsion by inverse emulsification

[0025] To the modified hydrophilic epoxy resin obtained in step 1), add a compound emulsifier, the compound emulsifier is an anionic surfactant and a nonionic surfactant compounded according to a mass ratio of 0.5:1, the amount of emulsifier It accounts for 5% of the mass of the modified hydrophilic epoxy resin. After sti...

Embodiment 2

[0031] A preparation method for modified epoxy resin emulsion, comprising the following steps:

[0032] 1) Introducing hydrophilic groups into epoxy resin

[0033] First put epoxy resin E12 and epoxy resin E51 in a molar ratio of 1:1, put them into the reactor, add acetone solvent, heat to 95°C, slowly drop diethanolamine, diethanolamine and epoxy resin E12+ into the reactor The molar ratio of the sum of epoxy resin E51 is 0.8:1, keep the temperature for 150min, after the reaction, remove the acetone solvent to obtain a modified hydrophilic epoxy resin;

[0034] 2) Preparation of modified epoxy resin emulsion by inverse emulsification

[0035] In the modified hydrophilic epoxy resin obtained in step 1), add a compound emulsifier, the compound emulsifier is an anionic surfactant and a nonionic surfactant according to a mass ratio of 0.9:1 compounded, the amount of emulsifier Accounting for 10% of the mass of the modified hydrophilic epoxy resin, after stirring evenly, add dei...

Embodiment 3

[0041] A preparation method for modified epoxy resin emulsion, comprising the following steps:

[0042] 1) Introducing hydrophilic groups into epoxy resin

[0043] First put epoxy resin E12 and epoxy resin E51 into the reaction kettle with a molar ratio of 2:1, add acetone solvent, heat to 80°C, slowly drop diethanolamine into the reaction kettle, diethanolamine and epoxy resin E12+ ring The molar ratio of the sum of epoxy resin E51 is 1.1:1, keep the temperature for 120min, after the reaction, remove the acetone solvent to obtain the modified hydrophilic epoxy resin;

[0044] 2) Preparation of modified epoxy resin emulsion by inverse emulsification

[0045] To the modified hydrophilic epoxy resin obtained in step 1), add a compound emulsifier, the compound emulsifier is an anionic surfactant and a nonionic surfactant compounded according to a mass ratio of 0.8:1, the amount of emulsifier Accounting for 7% of the mass of the modified hydrophilic epoxy resin, after stirring e...

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Abstract

The invention relates to a preparation method of a modified epoxy resin emulsion used as a main material of a carbon fiber sizing agent. The preparation method comprises the steps that 1, a hydrophilic group is introduced into epoxy resin; 2, reversed phase emulsification is carried out to prepare the modified epoxy resin emulsion. The modified unsaturated polyester emulsion prepared through the method is used as the main material of the carbon fiber sizing agent, and has the advantages that an obtained carbon fiber bundle is excellent in performance, good in wear resistance and good in flexibility, and compatibility of the sizing agent and carbon fiber is good. The method is simple in preparation process and easy to operate, and the production cost of the sizing agent is reduced.

Description

technical field [0001] The invention relates to the field of preparation methods of main materials of sizing agents, in particular to a preparation method of modified epoxy resin emulsion. Background technique [0002] Carbon fiber has a series of excellent properties such as heat resistance, heat conduction, high specific strength, high specific modulus, light weight, etc., so it is widely used in aerospace, sports and leisure products, civil engineering and other fields. Since carbon fiber is a brittle material, in the process of manufacturing composite materials, there is mechanical friction that causes wool and monofilament to break, thus affecting the mechanical properties of composite materials. Studies have shown that sizing agents can form a protective film on the surface of carbon fibers, reduce the incidence of hair and broken filaments, and protect carbon fibers. At present, the research is mainly on epoxy resin sizing agent, and the methods of making epoxy resin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/55C08L63/00C08J3/03C08G59/14D06M101/40
CPCD06M15/55C08G59/1477C08J3/03C08J2363/00C08J2463/00C08L63/00C08L2205/025D06M2101/40
Inventor 杨永岗胡培贤
Owner ZHONGJIAN TECH CO LTD