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Fluorine-containing epoxy resin curing agent and preparation method thereof

A technology of epoxy resin curing and end-capping agent, which is applied in the field of curing agent and can solve problems such as poor thermal stability, poor water resistance, and poor flexibility

Pending Publication Date: 2021-07-23
朱生寿
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the technical problems of poor water resistance, poor thermal stability, poor flexibility, low amine content and unsuitable curing speed of existing epoxy amine curing agents, the present invention provides a high water resistance, high temperature resistance, high flexibility, amine Epoxy resin curing agent with high content and suitable speed for curing epoxy resin, and epoxy materials prepared using this epoxy resin curing agent

Method used

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  • Fluorine-containing epoxy resin curing agent and preparation method thereof
  • Fluorine-containing epoxy resin curing agent and preparation method thereof

Examples

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Embodiment 1

[0025] A method for preparing a fluorine-containing epoxy resin curing agent, comprising the following steps: adding a modifier and an amine compound to dimethyl sulfoxide, under nitrogen protection, and reacting in the dark at 40°C for 20 hours , Distilled under reduced pressure, then added to ethanol solution, at 50°C, slowly added end-capping agent, reacted for 4h, distilled under normal pressure to obtain fluorine-containing epoxy resin curing agent.

[0026]Furthermore, the modifying agent is 2,2,3,3,4,4-hexafluoro-1,5-dimethacrylate pentyl ester.

[0027] Further, the amine compounds include 1,3-bis(3-aminopropyl)-1,1,3,3-tetramethyldisiloxane, octaaminopropyl clathrate polysilsesquioxane Alkane and 2-(tetrazol-5-yl)phenylboronic acid modified 3-aminopropyldimethylmethoxysilane are compounded according to the mass ratio of 65:5:30.

[0028] Further, the preparation method of the 2-(tetrazol-5-yl) phenylboronic acid modified 3-aminopropyl dimethyl methoxysilane comprises...

Embodiment 2

[0036] A method for preparing a fluorine-containing epoxy resin curing agent, characterized in that it comprises the following steps: adding a modifier and an amine compound to dimethyl sulfoxide, under nitrogen protection, and reacting in the dark at 45°C for 22 hours , Distilled under reduced pressure, and then added to ethanol solution, under the condition of 55°C, slowly added end-capping agent, reacted for 4.5h, and distilled under normal pressure to obtain a fluorine-containing epoxy resin curing agent.

[0037] Furthermore, the modifying agent is 2,2,3,3,4,4-hexafluoro-1,5-diacrylate pentyl ester.

[0038] Further, the amine compounds include 1,3-bis(3-aminopropyl)-1,1,3,3-tetramethyldisiloxane, octaaminopropyl clathrate polysilsesquioxane Alkane and 2-(tetrazol-5-yl)phenylboronic acid modified 3-aminopropyldimethylmethoxysilane are compounded according to the mass ratio of 68:4.5:27.5.

[0039] Further, the preparation method of the 2-(tetrazol-5-yl) phenylboronic aci...

Embodiment 3

[0047] A method for preparing a fluorine-containing epoxy resin curing agent, comprising the following steps: adding a modifier and an amine compound to dimethyl sulfoxide, under nitrogen protection, and reacting in the dark at 50°C for 24 hours , Distilled under reduced pressure, then added to ethanol solution, at 60°C, slowly added end-capping agent, reacted for 5 hours, and distilled under normal pressure to obtain a fluorine-containing epoxy resin curing agent.

[0048] Furthermore, the modifying agent is 2,2,3,3,4,4,5,5-octafluoro-1,6-dimethacrylate hexyl ester.

[0049] Further, the amine compounds include 1,3-bis(3-aminopropyl)-1,1,3,3-tetramethyldisiloxane, octaaminopropyl clathrate polysilsesquioxane Alkane and 2-(tetrazol-5-yl)phenylboronic acid modified 3-aminopropyldimethylmethoxysilane are compounded according to the mass ratio of 70:4:26.

[0050] Further, the preparation method of the 2-(tetrazol-5-yl) phenylboronic acid modified 3-aminopropyl dimethyl methoxys...

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Abstract

The invention belongs to the technical field of curing agents, and particularly relates to a preparation method of a fluorine-containing epoxy resin curing agent, the preparation method is characterized by comprising the following steps: adding a modifier and an amine compound into dimethyl sulfoxide, reacting for 20-28 hours in a dark place at 40-60 DEG C under the protection of nitrogen, performing reduced pressure distillation, adding into an ethanol solution, at 50-70 DEG C, slowly adding an end-capping reagent, reacting for 4-6 hours, and distilling at normal pressure to obtain the fluorine-containing epoxy resin curing agent. The fluorine-containing epoxy resin curing agent has the characteristics of high water resistance, high temperature resistance, high flexibility and high amine content, and has a proper epoxy resin curing speed.

Description

technical field [0001] The invention belongs to the technical field of curing agents, in particular to a fluorine-containing epoxy resin curing agent and a preparation method thereof. Background technique [0002] Epoxy resin, as one of the most widely used thermosetting resins, has been widely used in various fields. The uncrosslinked epoxy resin itself has a linear structure and is generally a liquid with a low viscosity after being heated. use value. Therefore, in the use of epoxy resin, it is necessary to add a curing agent to the epoxy resin matrix. The curing agent chemically reacts with the epoxy group at a certain temperature, making the epoxy resin matrix cross-linked to form a three-dimensional network structure. This cross-linked structure endows the epoxy resin with many excellent properties. Choosing different types of curing agents will make the cured epoxy resin show different properties and meet different use needs. Currently commonly used epoxy curing age...

Claims

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Application Information

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IPC IPC(8): C08G59/50C08L63/00
CPCC08G59/504C08G59/5053C08L63/00
Inventor 朱生寿
Owner 朱生寿
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