Single-component second-order reaction waterborne epoxy sealing emulsion for bridge deck concrete

Abstract

The invention discloses a single-component second-order reaction waterborne epoxy sealing emulsion for bridge deck concrete. The single-component second-order reaction waterborne epoxy sealing emulsion comprises the following components in percentage by weight: 2-8 parts of water-based amino mixed ether resin, 15-30 parts of E20 epoxy resin, 2-8 parts of E44 epoxy resin, 5-20 parts of polysiloxane modified epoxy resin, 1-8 parts of a buffer solution, 10-15 parts of a resin emulsifying agent , 2-8 parts of a curing agent, 1-3 parts of a rheological agent, 5-10 parts of a flexibilizer, 1-2 parts of a coupling agent, 0.5-1 part of a catalyst, 0.3-0.5 part of a coalescing agent, 0.2-0.3 part of a flatting agent, 0.2-0.4 part of a wetting agent, 0.1-0.5 part of a defoaming agent and 13-27 parts of water. The single-component second-order reaction waterborne epoxy sealing emulsion is high in waterproof performance, good in storage stability after being prepared, not prone to precipitation, capable of being used for a long time, good in constructability and suitable for various construction methods. The comprehensive performance is far better than that of the domestic commercially available waterproof paint at present. The single-component second-order reaction waterborne epoxy sealing emulsion isenvironmental and non-poisonous . And the single-component second-order reaction waterborne epoxy sealing emulsion adopts a special formula, is harmless to human and environment, and better meets the requirement of environmental protection. The single-component second-order reaction waterborne epoxy sealing emulsion has the advantages of low raw material cost, obvious cost advantage and stronger application prospect.

Description

technical field [0001] The invention relates to the field of coatings, in particular to a single-component second-stage reaction water-based epoxy sealing emulsion for bridge deck concrete. Background technique [0002] Waterproof coatings such as polyurea and polyurethane and polymer modified asphalt waterproofing membranes are mainly used for the waterproofing of existing expressway or intercity traffic bridge decks. Due to the influence of base surface treatment, ambient temperature, construction quality and other factors, waterproof coatings such as polyurea polyurethane have poor aging resistance of the waterproof membrane and low adhesion to the concrete base. The mechanical strength will decrease obviously, and it will peel off from the base layer, which will affect driving safety in severe cases. The waterproof membrane cannot be used alone, and the concrete protective layer needs to be added. On the one hand, the cost of the waterproof layer is increased. On the ot...

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Problems solved by technology

[0004] At present, there are many studies on concrete structure waterproof coatings on the market, mainly divided into two categories, one is polyurethane waterproof coating, this type of waterproof coating is usually applied with organic materials such as toluene and xylene. The other type is emulsion, for example, a silane-modified acrylic emulsion with room temperature crosslinking characteristics obtained by a soap-free emulsion polymerization disclosed in Patent No. 201210480382.3. The cost of application is high, and the main components of the chemical external admixtures of these two types of waterproof coatings are organic polymer paint films. The film-forming substances have a long solidification time and poor weather resistance. Compatible disadvantages, generally within 2 to 3 years, as the temperature changes with thermal expansion and contraction, it will crack and peel off

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