Epoxy structural adhesive for assembling prefabricated segments

A technology of epoxy structural adhesives and segments, applied in the field of epoxy adhesives, can solve the problems of operating time, early strength and thixotropy that cannot meet the process requirements at the same time, and achieve mechanical performance requirements, improved stability, and good use Effect

Inactive Publication Date: 2019-11-22
南京海拓复合材料有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, most of such adhesives on the market are monopolized by foreign products. The epoxy resin building structural adhesives commonly used in China cannot meet the process requirements in terms of operating time, early strength, and thixotropy at the same time. There are few mature products. Therefore, domestic Manufacturers should absorb the advantages of foreign products, develop high-quality and economical adhesives, and enhance their competitiveness with foreign products

Method used

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  • Epoxy structural adhesive for assembling prefabricated segments
  • Epoxy structural adhesive for assembling prefabricated segments

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Epoxy structural adhesive for prefabricated segment assembly: including A component and B component;

[0034] The preparation of A component comprises the following steps:

[0035] S1: Add 40 parts of graphene-modified epoxy resin, 25 parts of bisphenol A epoxy resin, 15 parts of bisphenol F epoxy resin, 5 parts of diluent, and 3 parts of silane coupling agent A into the reactor, and then Stir, during the stirring process, heat the reaction kettle to 60-65°C, and stir at a constant temperature of 60-65°C for 50 minutes, and stir evenly;

[0036] S2: During the stirring process, slowly add 1 part of modified graphene and 1 part of thixotropic agent into the reaction kettle within 5 to 6 minutes, vacuumize the reaction kettle after adding, and stir slowly for 60 minutes;

[0037] S3: Continue to add 20 parts of filler while stirring, and then stir rapidly under vacuum for 60 minutes to obtain component A of Example 1.

[0038] The preparation of component B includes the...

Embodiment 2

[0042] Epoxy structural adhesive for prefabricated segment assembly: including A component and B component;

[0043] The preparation of A component comprises the following steps:

[0044] S1: Add 50 parts of graphene-modified epoxy resin, 30 parts of bisphenol A epoxy resin, 20 parts of bisphenol F epoxy resin, 10 parts of diluent, and 5 parts of silane coupling agent A into the reactor, and then Stir, during the stirring process, heat the reaction kettle to 60-65°C, and stir at a constant temperature of 60-65°C for 50 minutes, and stir evenly;

[0045] S2: During the stirring process, slowly add 2 parts of modified graphene and 2 parts of thixotropic agent into the reaction kettle within 5 to 6 minutes, vacuumize the reaction kettle after adding, and stir slowly for 60 minutes;

[0046] S3: Continue to add 30 parts of filler while stirring, and then stir rapidly under vacuum for 60 minutes to obtain component A of Example 2.

[0047] The preparation of component B includes ...

Embodiment 3

[0051] Epoxy structural adhesive for prefabricated segment assembly: including A component and B component;

[0052] The preparation of A component comprises the following steps:

[0053] S1: Add 45 parts of graphene-modified epoxy resin, 28 parts of bisphenol A epoxy resin, 18 parts of bisphenol F epoxy resin and 8 parts of butanediol diepoxy diluent in sequence. 1. Add 4 parts of epoxy coupling agent into the reaction kettle, and then stir. During the stirring process, the reaction kettle is heated to 60-65°C, and stirred at a constant temperature of 60-65°C for 50 minutes, and stirred evenly;

[0054]S2: During the stirring process, slowly add 1 part of modified graphene and 2 parts of thixotropic agent into the reactor within 5 to 6 minutes. After the addition, vacuumize the reactor and stir slowly for 60 minutes;

[0055] S3: Continue to add 25 parts of silicon dioxide powder while stirring, and then stir rapidly under vacuum for 60 minutes to obtain component A of Examp...

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Abstract

The invention belongs to the technical field of epoxy adhesives, and particularly relates to an epoxy structural adhesive for assembling prefabricated segments. The invention discloses an epoxy structural adhesive for assembling prefabricated segments, which comprises a component A and a component B in a mass ratio of 3:1, wherein the component A is prepared from 40 to 50 parts of self-made graphene modified epoxy resin, 25 to 30 parts of bisphenol A epoxy resin, 15 to 20 parts of bisphenol F epoxy resin, 5 to 10 parts of diluent, 3 to 5 parts of silane coupling agent A, 1 to 2 parts of modified graphene, 1 to 2 parts of thixotropic agent and 20 to 30 parts of filler; and the component B comprises 20-25 parts of cardanol modified amine, 10-15 parts of polyamide, 1-2 parts of an accelerant,0.5-1 part of a toughening agent, 16-20 parts of modified aliphatic amine and 1-2 parts of a silane coupling agent B.

Description

technical field [0001] The invention belongs to the technical field of epoxy glue, and in particular relates to epoxy structural glue for assembling prefabricated segments. Background technique [0002] As the current domestic bridge construction is developing in the direction of prefabrication, factoryization and large-scale. The construction of bridges using the prefabricated segment matching method is a construction method that is vigorously promoted in bridge construction at present. This construction method has the advantages of fast construction speed, small construction area, small shrinkage and creep of box girder concrete, and small change in beam body alignment after completion. advantage. [0003] When adjacent segments are matched for construction, it is necessary to apply epoxy resin structural glue on the surface of the box girder. The selection of binder should follow the principles of quality assurance, convenient operation and low cost. That is to say, un...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J163/00C09J11/04C09J11/08C09J11/06
CPCC08K2003/2241C08K2201/011C08L2205/025C08L2205/035C09J11/04C09J11/06C09J11/08C09J163/00C08L63/00C08L9/02C08L9/00C08K3/042C08K3/36C08K3/34C08K3/346C08K3/22C08K5/5435C08K5/544
Inventor 孙滨雷成云张莉莉
Owner 南京海拓复合材料有限责任公司
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