Polyurethane coating for indoor waterproofing, and preparation and construction technology thereof

Abstract

The invention provides a polyurethane coating for indoor waterproofing. The appearance of the polyurethane coating is white and light gray, and from the color, the polyurethane coating can be directlydetermined no dark toxic and harmful substances such as black coal tar and coffee liquid cumarone are added; moreover, the polyurethane coating is suitable for the applying spraying construction technology to solve the problems such as the great difficulty in polyurethane coating scraping construction and the difficulty in quality control. The invention also provides the preparation and construction technology of the polyurethane coating. The preparation technology specially prepares a two-component water-based epoxy coating to be rolled and coated onto a base surface, and so that dust of thebase surface is wrapped and consolidated, the bonding strength of the base surface is improved, and as an interface agent at the same time, and the two-component water-based epoxy coating seals the base surface to meet construction requirements of the polyurethane waterproof coating on a wet base surface. By beating and covering the surface of the polyurethane waterproof coating with special sandlayer, the problem of subsequent plastering and tiling on the wall faces of the polyurethane coating is solved. At the same time, the construction of the layer has a very good protective effect on apolyurethane coating layer, and coating exposure to ultraviolet damage is avoided.

Description

technical field [0001] The invention relates to a polyurethane coating for indoor waterproofing and its preparation process and construction process. Background technique [0002] Leakage in the kitchen, bathroom and balcony is one of the parts with the highest rate of complaints about the building quality of residents. Due to the narrow space of indoor waterproof parts (kitchen and bathroom, pantry, terrace, etc.), and there are many pipelines and other equipment, in terms of construction operations, the current waterproof materials are mainly JS polymer cement waterproof coating and polyurethane waterproof Coatings and other coatings are mainly waterproof materials. [0003] JS polymer cement waterproof coating is easy to construct, has good environmental performance, and low cost. It currently occupies most of the market. However, due to the problems of poor deformation resistance, high water absorption rate, and water immersion resistance of the material itself, it is p...

AI Technical Summary

Problems solved by technology

[0003] JS polymer cement waterproof coating is easy to construct, has good environmental performance, and low cost. It currently occupies most of the market. However, due to the problems of poor deformation resistance, high water absorption rate, and water immersion resistance of the material itself, it is prone to leakage. It is difficult to meet the indoor waterproof requirements due to problems such as moisture and mold on the wall

[0004] The traditional polyurethane waterproof coating has a high elongation rate, high bond strength with concrete, and extremely low water absorption, which has a very good waterproof effect. However, due to its high requirements for the construction base, slow construction, high cost, and strong odor, it is not environmentally friendly. In addition, the façade tiles are easy to fall off after construction, which greatly limits its application in indoor waterproofing projects.