Preparation and application method of polyurethane building material atomizing spraying paint

Abstract

The invention discloses a preparation and application method of a polyurethane building material atomizing spraying paint, and belongs to the technical field of building material spraying. The preparation method comprises the following steps: uniformly mixing polymer polyol and isocyanic acid according to required different weight parts, obtaining full prepolymer after the polymer polyol and isocyanic acid are sufficiently reacted, mixing a chain extender, a flame retardant, a catalyst, a foaming agent, a foam stabilizer and modified styrene acrylic emulsion, and uniformly mixing the full prepolymer and a chain extension mixture in a room according to weight part after the materials are sufficiently mixed. The method enhances the waterproof and thermal insulation properties of the paint, enhances the adhesion and fixing effect of the paint on a wall surface, and meanwhile is convenient for technical personnel to detect the paint, and further to maintain and repair a damaged paint wallbody part in advance.

Description

technical field [0001] The invention relates to the technical field of building material spraying, and more specifically relates to a method for preparing and using polyurethane building material atomized spray paint. Background technique [0002] Polyurethane is a polymer containing a carbamate group in the main chain of a macromolecule called polyurethane, referred to as polyurethane. Polyurethane is divided into two categories: polyester polyurethane and polyether polyurethane. Polyester type is based on Polyurethane prepared from diisocyanate and hydroxyl-terminated polyester. Polyether polyurethane is polyurethane prepared from diisocyanate and hydroxyl-terminated polyether. The main characteristics of polyurethane are: high mechanical strength and oxidation stability, and relatively High flexibility and resilience, excellent oil resistance, solvent resistance, water resistance and fire resistance. Because polyurethane has many excellent properties, it has a wide range ...

AI Technical Summary

Problems solved by technology

[0003] In the existing construction industry, most of the waterproof materials and thermal insulation materials have a single performance, which cannot take into account both waterproof and thermal insulation performances. Moreover, the building waterproofing project and the building energy-saving project are constructed separately. The construction procedures are cumbersome and the quality is unstable. To form a leveling layer, due to the uneven surface of the polyurethane insulation layer, the amount of plastering mortar is large and the thickness of the leveling layer itself is uneven, resulting in cracks on the wall. Due to the single color of polyurethane in the spraying process, some cracking marks are not easy to find , after part of the wall is cracked, the staff fails to observe it in time, which will cause the subsequent part of the wall to peel off, which not only affects the appearance of the wall surface sprayed with polyurethane, but also affects the thermal insulation and waterproof effect of polyurethane

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