Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for modifying toughness of epoxy resin through toughening agent

A technology of epoxy resin and toughening agent, which is applied in the field of toughening agent modified epoxy resin toughness, can solve the problems of brittleness of cured material, poor impact resistance, and restricted application, so as to increase bonding performance, meet process requirements, The effect of good compatibility

Inactive Publication Date: 2019-08-09
WUHAN UNIV OF TECH
View PDF3 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Pure epoxy resin has a highly cross-linked three-dimensional network structure after curing, and its cured product has disadvantages such as brittleness, poor toughness, poor heat resistance and poor impact resistance.
These shortcomings restrict its application in some special fields such as aerospace, therefore, epoxy resin needs to be toughened and modified

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for modifying toughness of epoxy resin through toughening agent
  • Method for modifying toughness of epoxy resin through toughening agent
  • Method for modifying toughness of epoxy resin through toughening agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] Polycaprolactone diol modified high temperature curing system:

[0080] Put epoxy resin E51, polycaprolactone diol, modified methyltetrahydrophthalic anhydride and other raw materials with 2-methylimidazole additives in proportion in an oven at 50°C for 60 minutes, and according to the toughening agent polycaprolactone di The mass ratio of alcohol / epoxy resin E51 is 0 / 100, 10 / 100, 20 / 100, 30 / 100, 40 / 100, 50 / 100, 60 / 100, 70 / 100, 80 / 100, 90 / 100, Mix them in a ratio of 100 / 100, mark them as groups 2 to 11, stir well and place them in an oven at 50°C for 10 minutes to keep warm. Then 88 parts of modified methyltetrahydrophthalic anhydride were added to each component and mixed. At the same time, a group of control groups without toughening agent was set according to the original ratio as the first group. They were fully stirred evenly and placed in a defoamer Foaming, pour the mixed resin into the mold that meets the requirements of the GB / T2567-2008 resin casting body tes...

Embodiment 2

[0082] Polycaprolactone diol modified low temperature curing system:

[0083] Put epoxy resin E51, polycaprolactone diol and other raw materials in an oven at 50°C for 60 minutes, according to polycaprolactone diol / epoxy resin E51=10 / 100, 20 / 100, 30 / 100, 40 / 100 , mixed in a 50 / 100 ratio, marked as 2-6 groups, stirred well, placed in a 50°C oven for 10 minutes, then took out the mixed samples of each group, measured the temperature with a thermometer and added 30 parts to each group Modified polyamine curing agent. At the same time, set a group of control group without adding toughening agent according to the original ratio as the first group. After fully stirring, put it into the defoaming machine for defoaming treatment. Then pour the mixed resin into a mold that meets the requirements of the GB / T 2567-2008 resin casting body test standard, and cure completely according to the curing system at 40°C for 600min—80°C for 120min. The impact toughness of each cured resin cast bod...

Embodiment 3

[0085] Determination of curing system and curing degree of polycaprolactone diol modified high temperature curing system:

[0086] Put epoxy resin E51, polycaprolactone diol, modified high-temperature curing agent methyltetrahydrophthalic anhydride and other raw materials added in proportion to 2-methylimidazole additives in an oven at 50°C for 60 minutes, and take 90 parts of toughening agent Add polycaprolactone diol to 100 parts of epoxy resin E51, stir well and put it in an oven for 10 minutes, then take two parts of 88 parts of modified methyltetrahydrophthalic anhydride and add them to the mixed resin solution and 100 parts of epoxy resin respectively Stir evenly in E51, put it into a defoaming machine for defoaming treatment, place it at room temperature for a period of time, mark the formula without adding toughening agent as group B, and the formula with adding toughening agent as group A, wait until the temperature After reaching room temperature, DSC analysis was ca...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for modifying the toughness of an epoxy resin through a toughening agent. The method comprises: (I) modifying with a high temperature curing agent, (ii) constant temperature treatment of raw material, and (iii) curing blending, wherein the curing blending comprises low temperature blending and high temperature blending. According to the present invention, the polyurethane prepolymer soft section synthesis raw material polycaprolactone diol is used as the toughening agent, and has excellent compatibility with the epoxy resin, such that the obtained epoxy toughened product has substantially improved impact toughness and substantially improved elongation at break, and the bonding strength of the resin is increased to a certain extent.

Description

technical field [0001] The invention belongs to the technical field of epoxy resin modification and toughening, and in particular relates to a method for modifying the toughness of epoxy resin with a toughening agent. Background technique [0002] Epoxy resin (EP) refers to the general term for a class of polymers containing more than two epoxy groups in the molecule. It is the polycondensation product of epichlorohydrin and bisphenol A or polyol. Due to the chemical activity of the epoxy group, a variety of compounds containing active hydrogen can be used to open the ring, cured and cross-linked to form a network structure. Generally, after curing with curing agents such as amines, imidazoles, and acid anhydrides, it has good adhesion. Strength, dielectric properties, corrosion resistance, mechanical properties and low curing shrinkage, as excellent matrix materials are widely used in various fields of national defense, military industry, aerospace and national economy. P...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C08L63/00C08L67/04C08K5/3445C08G59/42C08G59/58
CPCC08G59/4223C08G59/58C08L63/00C08L67/04C08K5/3445
Inventor 张帆吴雨豪舒在勤张金咏王为民傅正义
Owner WUHAN UNIV OF TECH
Features
  • Generate Ideas
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com