A kind of epoxy resin adhesive film and preparation method thereof

An epoxy resin glue, epoxy resin technology, applied in the field of composite materials, can solve the problems of poor mechanical properties such as toughness and strength, unable to meet actual needs, unfavorable for large-scale production, etc., to achieve superior performance, strong toughness and enhancement , the effect of improving toughness and strength

Active Publication Date: 2021-04-06
LUOYANG INST OF CUTTING EDGE TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Hyperbranched polyether epoxy polymer can be used as an additive to toughen bisphenol A epoxy resin, but when forming hyperbranched polyether epoxy polymer, nitrogen protection is required, which is not conducive to large Large-scale production, and when hyperbranched polyether epoxy polymers are used as additives, accelerators, etc. need to be used, the steps are relatively cumbersome, and the final product has poor mechanical properties such as toughness and strength, which cannot meet actual needs

Method used

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  • A kind of epoxy resin adhesive film and preparation method thereof

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[0022] In the preparation method of a high-performance adhesive film provided by the invention, the hyperbranched epoxy resin is used as an additive, which effectively improves the mechanical strength of the epoxy resin. The present invention uses dihydroxypropionic acid as a monomer, pentaerythritol as a nucleus, and toluene as a solvent, adds catalyst A, reacts, and removes the solvent to obtain a hydroxyl-terminated hyperbranched polymer; wherein, the content of the dihydroxypropionic acid and the pentaerythritol The molar ratio is 4-60:1; the catalyst A is p-toluenesulfonic acid with a mass fraction of 2%; the reaction time is 10-14 hours, and the reaction temperature is 110-130°C.

[0023] Add a hydroxyl-terminated hyperbranched polymer and epichlorohydrin into a reaction vessel for a ring-opening reaction, add catalyst B, and perform a ring-closing reaction to obtain a hyperbranched epoxy resin; wherein the reaction vessel is a three-necked flask; the terminal hydroxyl T...

Embodiment 1

[0026] Using dihydroxypropionic acid with a substance ratio of 4:1 as a monomer, pentaerythritol as a nucleus, and toluene as a solvent, add 2% p-toluenesulfonic acid, react at 110°C for 10 hours, remove the solvent to obtain hyperbranched polymerization of terminal hydroxyl groups thing;

[0027] Add a hydroxyl-terminated hyperbranched polymer and epichlorohydrin with a functional group ratio of 1:5 in a three-necked flask, and perform a ring-opening reaction at 130°C for 10 hours, add 10% sodium hydroxide solution, and perform a ring-closing reaction at 0°C for 5 hours to obtain hyperbranched epoxy resin;

[0028] Mix 128 epoxy resin, hyperbranched epoxy resin and diaminodiphenyl sulfone with a mass ratio of 100:9:70, and prepare an epoxy resin adhesive film by melting method;

[0029] The adhesive film was simply laminated, cured at 80°C for 2 hours, and the mechanical properties were measured.

Embodiment 2

[0031] Using dihydroxypropionic acid with a substance ratio of 12:1 as the monomer, pentaerythritol as the core, and toluene as the solvent, add 2% n-butyl titanate, react at 120°C for 12 hours, remove the solvent to obtain terminal hydroxyl hyperbranching polymer;

[0032] Add a hydroxyl-terminated hyperbranched polymer and epichlorohydrin with a functional group ratio of 1:6 in a three-necked flask, and perform a ring-opening reaction at 130°C for 6h, add 15% sodium hydroxide solution, and perform a ring-closing reaction at 5°C for 7h to obtain hyperbranched epoxy resin;

[0033] Mix 128 epoxy resin, hyperbranched epoxy resin and diaminodiphenyl sulfone with a mass ratio of 100:9:90, and prepare an epoxy resin adhesive film by melting method;

[0034] The adhesive film was simply laminated, cured at 100°C for 3 hours, and the mechanical properties were measured.

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Abstract

The invention provides an epoxy resin film and a preparation method thereof. The method comprises: taking dihydroxypropionic acid as a monomer, pentaerythritol as a nucleus, and toluene as a solvent, adding catalyst A for dehydration, and removing the solvent to obtain terminal hydroxyl hyperbranched polymerization Adding hydroxyl-terminated hyperbranched polymer and epichlorohydrin in the reaction vessel, ring-opening reaction occurs, adding catalyst B, ring-closing reaction occurs, and obtains hyperbranched epoxy resin; epoxy resin and hyperbranched epoxy resin mixing, adding a curing agent, and preparing an epoxy resin adhesive film by a hot melt method.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to an epoxy resin adhesive film and a preparation method thereof. Background technique [0002] With the increasing requirements for functionalization and integration in the fields of aircraft and wind power generation, the mechanical properties of the corresponding packaging materials have also put forward higher requirements. [0003] Due to the excellent mechanical properties of epoxy resin, such as strong corrosion resistance, high fatigue strength, and good electrical insulation, more and more composite materials use epoxy resin as a matrix, but its mechanical properties such as impact strength and bending strength are still to be determined. improve. Usually need to add toughening agent to improve its toughness and strength. [0004] Hyperbranched polyether epoxy polymer can be used as an additive to toughen bisphenol A epoxy resin, but when forming hyperbranched polyether...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L63/00C08L87/00C08G83/00
CPCC08G83/005C08J5/18C08J2363/00C08J2487/00C08L63/00C08L2203/16C08L87/00
Inventor 不公告发明人
Owner LUOYANG INST OF CUTTING EDGE TECH
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