Waterproof solvent-free epoxy resin coating and its construction method in drinking water projects

Abstract

The invention provides a waterproof solvent-free epoxy resin coating in drinking water project. The waterproof solvent-free epoxy resin coating comprises a component A and a component B, wherein the component A comprises epoxy resin, an epoxy active diluent, an additive, a filler and a pigment; the component B comprises modified polyamine; the solvent-free epoxy resin coating comprises the following materials in parts by weight: 80-100 parts of epoxy resin, 10-20 parts of an epoxy active diluent, 3-10 parts of an additive, 55-155 parts of a filler, 0.5-3 parts of a pigment and 80-120 parts of modified polyamine. The epoxy active diluent is selected from at least one of dodecyl glycidyl ether, 1,4-butanediol diglycidyl ether and ethylene glycol diglycidyl ether; the additive comprise at least one of a leveling agent, a rheological additive, a dispersing agent, a substrate wetting agent, a defoaming agent and an ultraviolet ray absorbent; the filler comprises titanium dioxide, talcum powder, wet sericite powder, wollastonite powder and ceramic powder.

Description

technical field [0001] The invention relates to the field of material technology, in particular to a waterproof solvent-free epoxy resin coating for drinking water items and a construction method for the waterproof solvent-free epoxy resin coating for drinking water items. Background technique [0002] At present, the waterproof construction methods of drinking water pools are as follows: one is the combination of SBS coiled material and protective layer, the SBS coiled material is firstly constructed, and the protective layer is further constructed on the coiled material; the other is polymer cement mortar and polyurethane Waterproof materials combined with coating film and protective layer, cement-based permeable crystallized waterproof materials, and waterproof materials combined with EPDM and non-woven fabrics. [0003] At present, the problems often encountered by the above-mentioned waterproof materials are: [0004] 1. During the construction of SBS coiled material, ...

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Problems solved by technology

[0004] 1. During the construction of SBS coiled material, it cannot be closely adhered to the base surface concrete, and the joint room between the coiled materials is a weak link, and a little carelessness will cause the failure of the entire waterproof system; secondly, once the water penetrates and breaks through the cement mortar protective layer , after long-term contact with the sbs membrane as a rubber asphalt waterproof membrane, it may cause pollution to the quality of drinking water, so a thick cement mortar protective layer is required, and the protective layer needs to be maintained for about 2 weeks

Not only increases the construction cost, but also delays the construction period

[0005] 2. Many polyurethane coatings contain organic solvents, which may affect water quality if soaked in water for a long time

[0006] 3. Cement-based osmotic crystallization, long maintenance time, delaying the construction period

[0007] 4. EPDM has good performance, but it is uneconomical and the construction cost is high

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