Synthesis technique of dual-component wet and heat ageing resistant epoxy building structure strengthening adhesive

Abstract

The invention provides a double-component, heat and humidity resistance epoxy architecture reinforcement glue, comprising first and second components. The preparation method of the glue comprises: 1) adding reactive toughening agent thiocol, fluid epoxy resin, reactive diluent C12-14 tertiary carbonic acid ethylene oxidic ester, reactive diluent phenyl glycidyl ether and antifoaming agent by weight portion, silane coupler, discharged gas phase white carbon black and uniformly stirring, standing and defoaming to obtain first compnent: 2) uniformly stirring the isophorone diamine, metaxylene diamine, aromatic alcohol, salicylic acid and epoxy resin E44 to obtain second component curing agent by weight portion; mixing the promoter and curing agent in proportion to obtain second component. The architecture reinforcement glue without solvent can be cured at room temperature and conveniently constructed, with fine viscosity, good thixotropy, excellent resistance to heat and humidity, mechanical property and adhesive property, without toxin and pollution.

Description

technical field [0001] The invention relates to a structural reinforcement adhesive used in the construction industry, in particular to an epoxy structural reinforcement adhesive resistant to humidity and heat aging. Background technique [0002] The national standard "Code for Design of Concrete Structure Reinforcement" (GB50367-2006) stipulates that the adhesive used for the reinforcement of reinforced concrete load-bearing structures, the shear performance of steel-steel bonding must pass the damp heat aging test, and meet the requirements of environmental protection construction colloid performance and other aspects , but the existing building structure reinforcement glue has the following deficiencies in the use process and its own performance: [0003] Imported structural reinforcement glue has a slow curing and cross-linking reaction, and the construction period is too long; low temperature does not cure, and additional insulation and heating measures must be taken wh...

AI Technical Summary

Problems solved by technology

[0003] Imported structural reinforcement glue has a slow curing and cross-linking reaction, and the construction period is too long; low temperature does not cure, and additional insulation and heating measures must be taken when the weather becomes cold during the construction process; the initial bonding strength is low, which affects the bonding effect and on-site construction operations, and The price is expensive, and the cost of building reinforcement is high, which is unbearable for users

[0004] The domestic structural reinforcement adhesive has poor moisture and heat aging resistance, high brittleness, poor toughness, and its mechanical properties cannot meet the latest national A-level standard for building structural adhesives, and cannot meet the construction requirements of national key projects; the application period cannot be adjusted during use, and the summer The structural adhesive will gel in a short period of time, which is not conducive to large-scale reinforcement; when the temperature is lower than 10°C, the construction period will be too long, and it will not even gel below 0°C, which will affect the construction

[0005] Moreover, most of the structural reinforcement adhesives contain solvents that pollute the environment and curing agents that are harmful to the human body, which is not conducive to environmental protection and the health of construction workers.