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Multi-component sealant and preparation method thereof

A sealant and multi-component technology, applied in the field of building materials, can solve the problems of secondary cracking, waste, and many processing steps, and achieve the effects of simple preparation method and operation, high material utilization rate, and avoiding secondary cracking.

Inactive Publication Date: 2020-02-21
HUNAN KOSEN NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many processing steps in this method, and a large number of small polyurethane foamed iron cans and redundant foam fragments are produced on the construction site, which is a lot of waste and is not environmentally friendly. Moreover, the foam is flammable and there is a risk of being embedded in the gap.
Moreover, the strength of water-based putty is low, and it is easy to absorb moisture after drying and cause secondary cracking

Method used

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  • Multi-component sealant and preparation method thereof
  • Multi-component sealant and preparation method thereof

Examples

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Effect test

preparation example Construction

[0128] 1) Preparation of component A:

[0129] Mix the epoxy resin, reactive diluent and thixotropic agent uniformly under elevated temperature conditions (preferably mix at 50-95°C, more preferably 60-80°C, eg 70°C, preferably stir and mix). After a period of time, start high-speed stirring and vacuumize (for example, the vacuum is -0.01MPa to -0.09MPa), and the high-speed stirring time is 20-60min. Then add the inorganic filler and continue to stir (stir for 15-40min), cool down and stop stirring. After stopping stirring for 30 minutes, stop vacuuming to obtain component A.

[0130] 2) Preparation of polyetheramine modified curing agent:

[0131] Add E-51 epoxy resin dropwise in polyoxypropylene diamine and / or polyoxyethylene diamine and / or polyoxypropylene triamine (preferred drop time 1-3h, preferred reaction 0.1-2h, preferred reaction temperature is not over 75°C, preferably 40-70°C), to obtain polyetheramine modified curing agent I. Preferably, continue to add 0.5-10...

Embodiment 1

[0164] 1) Preparation of component A:

[0165] 51.0g of E-51 epoxy resin, 5.9g of benzyl glycidyl ether and 2.0g of hydrophobic fumed silica were stirred and mixed uniformly under the condition of raising the temperature to 70°C. After 20 minutes, turn on the high-speed stirring and evacuate to -0.09MPa, and the high-speed stirring time is 45 minutes. Then add 43.0g active calcium carbonate and continue to stir for 30min, cool down to room temperature and stop stirring. After stopping stirring for 30 minutes, stop vacuuming to obtain component A.

[0166] 2) Preparation of polyetheramine modified curing agent:

[0167] After stirring and mixing 12.6g polyoxypropylene diamine, 16.0g polyoxyethylene diamine, and 10.4g polyoxypropylene triamine to obtain a mixed solution, then add 25.0g E-51 epoxy resin dropwise to the mixed solution, and add dropwise The time is 2 hours, the dropwise reaction temperature is 70° C., and the polyetheramine modified curing agent I is obtained. ...

Embodiment 2

[0174] 1) Preparation of component A:

[0175] 44.0g of E-51 epoxy resin, 4.6g of benzyl glycidyl ether and 1.8g of hydrophobic fumed silica were stirred and mixed uniformly under the condition of raising the temperature to 70°C. After 20 minutes, turn on the high-speed stirring and evacuate to -0.09MPa, and the high-speed stirring time is 45 minutes. Then add 30.0g active calcium carbonate and continue to stir for 30min, cool down to room temperature and stop stirring. After stopping stirring for 30 minutes, stop vacuuming to obtain component A.

[0176] 2) Preparation of polyetheramine modified curing agent:

[0177] After stirring and mixing 12.6g polyoxypropylene diamine, 16.0g polyoxyethylene diamine, and 10.4g polyoxypropylene triamine to obtain a mixed solution, then add 25.0g E-51 epoxy resin dropwise to the mixed solution, and add dropwise The time is 2 hours, the dropwise reaction temperature is 70° C., and the polyetheramine modified curing agent I is obtained. ...

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Abstract

The invention discloses a multi-component sealant and a preparation method thereof. The sealant is a reactive adhesive. In the curing process, the amount of volatile matters is extremely low, the shrinkage rate is low, the formula selects a modified curing agent with excellent toughness, and the modified curing agent is a high-toughness low-shrinkage-rate curing agent prepared by modifying polyether amine through adopting epoxy resin to be mixed with an active diluent, has excellent adhesion, and also has a certain stress relaxation function. Meanwhile, the sealant also contains amino alkoxy silane modified polydimethylsiloxane, so that the wear resistance, the aging resistance, the stain resistance and the like of the sealant can be enhanced; the method and the operation are relatively simple and convenient, the material utilization rate is high, the concrete-colloid-concrete has relatively high strength after a gap is sealed, and later secondary cracking can be effectively avoided.

Description

technical field [0001] The invention relates to a sealant for construction, in particular to a multi-component sealant and a preparation method thereof, belonging to the technical field of construction materials. Background technique [0002] Prefabricated Concrete (PC structure for short) is a concrete structure made of prefabricated components as the main component, assembled, connected, and partially cast in place. Compared with the traditional process that is all completed on site, it has the advantages of high construction efficiency, less materials used on the construction site, low noise, saving templates, and saving water, electricity and energy consumption. [0003] Since the PC components are assembled, connected, and partly cast-in-place to form the overall building, there are a large number of gaps between the PC components, between the PC and the cast-in-place concrete, and between the PC and the doors and windows. According to the environment, it can be divide...

Claims

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Application Information

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IPC IPC(8): C09J163/00C09J11/08C09J11/04
CPCC08K2003/265C08K2201/005C08K2201/014C08L2205/025C08L2205/035C09J11/04C09J11/08C09J163/00C08L83/04C08K13/06C08K9/06C08K3/26C08K7/26
Inventor 郑保昌钟雪琴欧阳光华王军石亮
Owner HUNAN KOSEN NEW MATERIAL
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