Pre-stressed steel strand slow-binding agent with good heat resistance and 18-month curing time
A prestressed steel strand, heat-resistant performance technology, applied in the field of slow binder, prestressed steel strand slow binder, can solve the problems of inability to accommodate fillers, shortened pot life, inconvenient operation, etc., to achieve enhanced Toughness, reduced volatility, and increased curing reactivity
Inactive Publication Date: 2015-03-04
TIANJIN SHINKUNTAI ADVANCED PRESTRESSING TECH
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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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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) 7KG, 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) 8KG, the filler is nano-calcium carbonate 50KG.
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The invention relates to a pre-stressed steel strand slow-binding agent with good heat resistance and 18-month curing time. The pre-stressed steel strand slow-binding agent comprises the following components in parts by weight: 100 parts of epoxy resin, 5-15 parts of a diluent, 7-8 parts of an amine curing agent and 50-80 parts of filler. In the slow-binding agent disclosed by the invention, modified aromatic amine with higher curing temperature is used as one component of the curing agent, so that the high heat resistance of the slow-binding agent is ensured, meanwhile, in order to overcome the defects of low activity and low toughness of aromatic amine, phenol aldehyde amine is added in the curing agent to improve the activity and heat resistance, and polyetheramine is added to improve the toughness, and the three types of amines are uniformly mixed according to a certain ratio to produce 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 18 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 abo...
Claims
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IPC IPC(8): C09J163/00C09J11/04C09J11/08
Inventor 牛坡
Owner TIANJIN SHINKUNTAI ADVANCED PRESTRESSING TECH
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