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Preparation method of novel high-toughness epoxy resin grouting material

A technology of epoxy resin grouting and epoxy resin, which is applied in the direction of epoxy resin glue, adhesive type, adhesive, etc., and can solve the problems that the molecular structure technology of epoxy resin has not been reported.

Inactive Publication Date: 2019-05-03
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, this technology of directly modifying the molecular structure of epoxy resin during the synthesis process has not been reported.

Method used

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  • Preparation method of novel high-toughness epoxy resin grouting material
  • Preparation method of novel high-toughness epoxy resin grouting material
  • Preparation method of novel high-toughness epoxy resin grouting material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1) Under the protection of nitrogen, mix 22g of bisphenol A, 8g of polyisocyanate and 138g of epichlorohydrin, heat up to 50°C, and perform a block reaction for 2.0-2.5h to obtain a block material;

[0028] 2) The temperature of the block material was raised to 70°C, 1.5g of catalyst was added, and the reaction was continued for 3 hours to obtain an etherified material;

[0029] 3) Carrying out vacuum distillation on the etherified material above to remove excess solvent epichlorohydrin to obtain the decompressed material;

[0030] 4) Cool the above decompressed material to 50°C, add 135g NaOH solution (25% by mass) and react for 3 hours to obtain a polymer material;

[0031] 5) Let the polymer material stand for stratification, add 25g of toluene to dissolve the obtained polymer material, and then add 400g of deionized water to the obtained organic layer for neutralization and washing. The washing temperature is 40°C to ensure that the residual salt in the organic laye...

Embodiment 2

[0035] 1) Under the protection of nitrogen, mix 15g of bisphenol A, 5g of polyisocyanate and 100g of epichlorohydrin, raise the temperature to 60°C, and perform a block reaction for 2.0-2.5h to obtain a block material;

[0036] 2) The temperature of the block material was raised to 80°C, 1.1 g of catalyst was added, and the reaction was continued for 4 hours to obtain an etherified material;

[0037] 3) Carrying out vacuum distillation on the etherified material above to remove excess solvent epichlorohydrin to obtain the decompressed material;

[0038] 4) Cool the above decompressed material to 60°C, add 103g NaOH solution (mass fraction 28%) and react for 2 hours to obtain a polymer material;

[0039] 5) Let the polymer material stand for stratification, add 18g of toluene to dissolve the obtained polymer material, and then add 340g of deionized water to the obtained organic layer for neutralization and washing. The washing temperature is 40°C to ensure that the residual sal...

Embodiment 3

[0043] 1) Under the protection of nitrogen, mix 10g of bisphenol A, 3g of polyisocyanate and 55g of epichlorohydrin, raise the temperature to 40°C, and perform a block reaction for 2.0-2.5h to obtain a block material;

[0044] 2) The temperature of the block material is raised to 60°C, 0.6g of catalyst is added, and the reaction is continued for 2 hours to obtain an etherified material;

[0045] 3) Carrying out vacuum distillation on the etherified material above to remove excess solvent epichlorohydrin to obtain the decompressed material;

[0046] 4) Cool the above-mentioned decompression material to 50°C, add 35g NaOH solution (20% by mass) and react for 2.5 hours to obtain a polymer material;

[0047] 5) Let the polymer material stand for stratification, add 15g of toluene to dissolve the obtained polymer material, and then add 200g of deionized water to the obtained organic layer for neutralization and washing. The washing temperature is 40°C to ensure that the residual sa...

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Abstract

The invention relates to the field of high polymer synthesis and processing and especially provides a preparation method of a novel high-toughness epoxy resin grouting material. During preparation process of commercial epoxy resin, polyisocyanate containing a flexible chain segment is added to form a raw material; then the raw material is reacted with bisphenol A and epoxy chloropropane to generate modified epoxy resin simultaneously containing a flexible chain segment and a rigid chain segment; then a curing reaction is carried out with a curing agent to prepare a modified epoxy resin grouting material. The modified epoxy resin includes: 0 to 10 parts of the polyisocyanate, 1 to 10 parts of the bisphenol A, 10 to 30 parts of the epoxy chloropropane, 45 to 100 parts of the curing agent, 5to 30 parts of a diluent, and 0.1 to 1 part of an accelerator. The grouting material is significantly improved in flexibility. During the synthesis process, the high-toughness modified epoxy resin isdirectly produced. The method simplifies the subsequent technology and process of toughening modification on the commercial epoxy resin, so that the design of the high-toughness modified epoxy resin has excellent application prospect.

Description

technical field [0001] The invention relates to the field of polymer material synthesis and processing, in particular to a preparation method of a novel high-toughness epoxy resin grouting material. Background technique [0002] Epoxy resin is an important polymer material. Its molecules contain highly active epoxy groups and various polar groups. It has strong adhesion and good compatibility with various materials. Its curing It has low physical shrinkage, excellent mechanical properties, easy preparation, and wide application range. It is a widely used structural reinforcement grouting material. However, the cured epoxy resin is relatively brittle and has poor impact resistance, which limits the expansion of its application. Therefore, it is necessary to study the toughening modification of epoxy resin. At present, the method of modifying the toughness of epoxy resin is mainly to add a second phase into the epoxy resin matrix, such as rubber elastomer, thermoplastic resi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J163/00C08G59/06
Inventor 张雄飞卢小莲乔露
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY