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Prestressed steel strand slow-binding agent with good heat resistance and 6-month curing time

A technology of prestressed steel strands and heat resistance, applied in the direction of adhesives, adhesive types, polymer adhesive additives, etc., can solve the problems of inability to accommodate fillers, shorten the pot life, and inconvenient operation, and achieve enhanced Toughness, reduced volatility, and increased curing reactivity

Inactive Publication Date: 2015-03-04
TIANJIN SHINKUNTAI ADVANCED PRESTRESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The curing agent used in this invention is polyamide resin. Polyamide is a traditional curing agent. It cures very slowly at a temperature of 15-25°C, and the amount of glue is also large, but when the temperature is higher than 35°C, the pot life is shortened rapidly. , it is inconvenient to operate, and the viscosity is too high to accommodate more fillers, which restricts its promotion in construction adhesives

Method used

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  • Prestressed steel strand slow-binding agent with good heat resistance and 6-month curing time

Examples

Experimental program
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Effect test

preparation example Construction

[0046] The preparation method of this slow binding agent is:

[0047]Put each component of the slow binder into the reaction kettle one by one, stir at 30-40°C for about 10-20 minutes, and mix evenly.

Embodiment 1

[0049] Bisphenol A epoxy resin (E51) 100KG, non-reactive diluent ethyl acetate 5KG, curing agent (modified DDM and phenalkamine mixed at a mass ratio of 2:3) 20KG, filler nano-calcium carbonate 50KG.

Embodiment 2

[0051] Bisphenol A epoxy resin (E51) 100KG, inactive diluent (butyl acetate and dibutyl phthalate mixed at a mass ratio of 1:2) 10KG, curing agent (modified DDS, phenalkamine and polyetheramine According to the mass ratio of 2:3:1 mixed) 20KG, the filler is nano-calcium carbonate 50KG.

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Abstract

The invention relates to a prestressed steel strand slow-binding agent with good heat resistance and 6-month curing time. The prestressed steel strand slow-binding agent is prepared from the following components in parts by weight: 100 of epoxy resin, 5-15 of a diluent, 20-25 of an amine curing agent and 50-80 of filler. According to the prestressed steel strand slow-binding agent disclosed by the invention, as modified aromatic amine with high curing temperature is used as one of the components of the curing agent, high heat resistance of the prestressed steel strand slow-binding agent is ensured; meanwhile, in order to overcome the disadvantages of low activity and toughness of the aromatic amine, phenol-aldehyde amine is added in the curing agent to improve the activity and the heat resistance, the polyether amine is added in the curing agent to improve the toughness, and the three types of the modified aromatic amine, the phenol-aldehyde amine and the polyether amine are uniformly mixed according to a certain ratio to prepare the curing agent with good heat resistance and high toughness.

Description

technical field [0001] The invention belongs to the field of prestressing, and relates to a slowing binder for prestressed steel strands, in particular to a slowing binder for prestressed steel strands with good heat resistance and a curing time of 6 months. Background technique [0002] Slow bonding prestressing technology is another major innovation of traditional prestressing technology, and it is an innovative product of continuous development and progress of prestressing technology. Slow bonded prestressing technology inherits the simple and cheap construction advantages of non-bonded prestressing technology, overcomes the disadvantages of bonded prestressing technology, such as complex construction technology and limited use conditions of nodes, with its simple construction technology and excellent mechanical indicators, The seismic performance of the structure is significantly improved. [0003] The research on slow bonding prestressing technology has lasted for abou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J163/00C09J11/06C09J11/08C09J11/04
Inventor 牛坡
Owner TIANJIN SHINKUNTAI ADVANCED PRESTRESSING TECH
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