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Epoxy Adhesives for Concrete Wet Surfaces

A technology for epoxy resin glue and concrete, which is applied in the direction of epoxy resin glue, adhesive, adhesive additive, etc., can solve the problems of unimproved material brittleness, high price, and difficulty in mass production.

Active Publication Date: 2022-03-15
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the adhesive prepared by adding this nitrile rubber has improved the bonding performance, the brittleness of the material itself has not been improved, and the domestic production of this liquid nitrile rubber is relatively small, the price is relatively expensive, and it is not easy to produce in large quantities

Method used

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  • Epoxy Adhesives for Concrete Wet Surfaces
  • Epoxy Adhesives for Concrete Wet Surfaces

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A kind of epoxy resin adhesive for wet concrete surface and preparation method thereof, its preparation method is as follows:

[0019] 1) Take 5 parts of palygorskite that has been wet-milled, centrifuged, ultrasonically dispersed, and dried, 15 parts of glass powder that has been dry-milled and wet-milled, and 100 parts of bisphenol A epoxy resin (E-51 ) are mixed and then fully stirred to obtain component A.

[0020] 2) Mix 116 parts of 1,6-hexamethylenediamine and 298 parts of cardanol, stir and heat to 35°C for 0.5h in turn, then raise the temperature to 70°C and slowly add 60 parts of formaldehyde solution with a mass fraction of 37% to 40%. After the dropwise addition of the formaldehyde solution is completed, raise the temperature to 90°C for 2 hours to fully react, vacuum filter to obtain the phenalkamine mixture, weigh 45 parts of the phenalkamine mixture, mix 10 parts of n-propylamine, 4 parts of white carbon black and the phenalkamine mixture , and stir even...

Embodiment 2

[0023] A kind of epoxy resin adhesive for wet concrete surface and preparation method thereof, its preparation method is as follows:

[0024] 1) Take 6.5 parts of palygorskite that has been wet-milled, centrifuged, ultrasonically dispersed, and dried, 17 parts of glass powder that has been dry-milled and wet-milled, and 100 parts of bisphenol A epoxy resin (E-51 ) are mixed and then fully stirred to obtain component A.

[0025] 2) Mix 130 parts of 1,6-hexamethylenediamine and 330 parts of cardanol, stir and heat in turn to 37°C for 0.7h, then slowly add 70 parts of formaldehyde solution with a mass fraction of 37% to 40% after heating up to 75°C. After the dropwise addition of the formaldehyde solution was completed, the temperature was raised to 95°C for 3 hours to fully react, and vacuum filtration was performed to obtain a phenalkamine mixture. Weighed 47 parts of the phenalkamine mixture, mixed 16 parts of n-propylamine, 5 parts of white carbon black and the phenalkamine m...

Embodiment 3

[0028] A kind of epoxy resin adhesive for wet concrete surface and preparation method thereof, its preparation method is as follows:

[0029] 1) Take 8 parts of palygorskite that has been wet-milled, centrifuged, ultrasonically dispersed, and dried, 20 parts of glass powder that has been dry-milled and wet-milled, and 100 parts of bisphenol A epoxy resin (E-51 ) are mixed and then fully stirred to obtain component A.

[0030] 2) Mix 141 parts of 1,6-hexamethylenediamine and 360 parts of cardanol, stir and heat to 40°C for 1 hour, then slowly add 75 parts of formaldehyde solution with a mass fraction of 37% to 40% when the temperature is raised to 80°C. After the dropwise addition of the solution, raise the temperature to 100°C for 4 hours to fully react, vacuum filter to obtain a mixture of phenalkamines, weigh 50 parts of the mixture of phenalkamines, mix 20 parts of n-propylamine, 6 parts of white carbon black and the mixture of phenalkamines at room temperature Stir evenly...

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Abstract

The invention relates to an epoxy resin adhesive used for concrete wet surfaces, which solves the problems of high cost, high brittleness, low toughness and various performances of the existing epoxy resin adhesives. The present invention is prepared by mixing component A and component B at a ratio of 2 to 4:1, wherein the component A includes the following raw materials in parts by weight: 100 parts of bisphenol A epoxy resin, 5 to 10 parts of palygorskite powder 15-25 parts of waste glass powder; the composition and parts by weight of the B component are: 45-65 parts of modified amine curing agent, 10-20 parts of monoamine, and 4-6 parts of thixotropic agent. The invention has simple raw materials, low cost, good flexibility, excellent hydrophobicity, low permeability, low toxicity, self-drying property and excellent bonding performance, and is especially suitable for concrete wet surfaces.

Description

technical field [0001] The invention relates to the field of adhesive preparation, in particular to an epoxy resin adhesive for wet concrete surfaces. Background technique [0002] Epoxy resin is a general term for a polymer compound containing at least two epoxy groups. Due to the relatively active chemical activity of the epoxy group, it can react with various organic compounds and inorganic compounds. At the same time, epoxy resin is A common thermosetting polymer material, depending on the type of curing agent used, the mechanical properties, adhesiveness, and electrical conductivity of the cured product are different, so it can be widely used in adhesives, coatings, insulation materials, composite materials, etc. [0003] Common curing agents are divided into two categories: heating curing agents and room temperature curing agents. Heating-curing epoxy resins cure quickly, but because heating consumes a lot of resources in the actual application process, adhesives for ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J163/00C09J11/04C08G59/50C08G59/56C08G59/62
CPCC09J163/00C09J11/04C08G59/623C08G59/56C08G59/5006C08K7/10C08K3/40
Inventor 陈威郑襄南项志鼎贺行洋苏英秦义良甄博文张路川曾景义方娇林江波
Owner HUBEI UNIV OF TECH
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