Polyurethane coating for indoor waterproofing and its preparation and construction technology

Abstract

The invention provides a polyurethane coating for indoor waterproofing. Its appearance is white and light gray, and it can be visually judged from the color that no dark toxic and harmful substances such as black coal tar, brown liquid coumarone, etc. are added; and it is suitable for use The spraying construction technology solves the problems of difficult scraping and quality control of polyurethane coatings. The invention also provides the preparation process and construction process of the polyurethane coating. The invention specially prepares a two-component water-based epoxy coating to be rolled on the base surface, which can wrap and consolidate the dust on the base surface, improve the bonding strength of the base surface, and at the same time act as an interface agent to seal the base surface to meet the requirements of polyurethane waterproof coatings. Construction requirements on wet substrates. The invention solves the problem of subsequent plastering and tiling of the polyurethane coating wall surface by patting and coating a special sand layer on the surface of the polyurethane waterproof coating; at the same time, the construction of this layer plays a very good role in protecting the polyurethane coating layer and avoids the exposure of the coating Damaged by UV rays.

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.