Self-emulsifying type water curing environment-friendly polyurethane waterproof paint

Abstract

The invention relates to self-emulsifying type water curing environment-friendly polyurethane waterproof paint, which is prepared by uniformly mixing an ingredient A and an ingredient B according to a certain proportion and then adding water for emulsification, wherein the ingredient A comprises the following ingredients in proportion by weight: 50 percent to 70 percent of mixed polyether polyol, 20 percent to 30 percent of methyl diphenylene diisocyanate and 1 percent to 30 percent of plasticizers; the ingredient B comprises the following ingredients in percent by weight: 25 percent to 55 percent of liquid fillers, 40 percent to 60 percent of inorganic powder, 1 percent to 10 percent of chemical additives and 0.1 percent to 5 percent of hydrophilic chain-extending agents. The self-emulsifying type water curing environment-friendly polyurethane waterproof paint has the advantages of environment protection, low cost, long operation time and high mechanical strength, is applicable to the building waterproof field, and is particularly suitable for construction in humid base layers, humid environment and sealed spaces.

Description

technical field [0001] The invention relates to a polyurethane waterproof coating, in particular to a self-emulsifying environmentally friendly water-curing environmentally friendly polyurethane waterproof coating. Background technique [0002] Polyurethane waterproof coating is considered to be the most excellent waterproof coating in the waterproof industry because of its water resistance, oil resistance, chemical medium corrosion resistance, high and low temperature resistance, high tensile strength, high elongation, high bonding strength, and simple construction. Has a very wide range of applications. Existing polyurethane waterproof coatings are divided into two types: one-component and two-component. Among them, one-component polyurethane coatings are cured by absorbing moisture in the air, so the curing speed is extremely slow in dry and low-temperature environments, which will greatly affect the construction period. ; In addition, the one-component polyurethane wate...

AI Technical Summary

Problems solved by technology

The raw material MOCA in component B has a pungent smell, which is a health hazard to production personnel and paint applicators, and is a carcinogenic chemical. A large amount of liquid raw materials such as solvent oil, aromatic oil, coumarone resin, etc., make polyurethane coatings have a pungent smell, especially in closed and unventilated spaces such as indoors and basements, which will pose a huge threat to the health of construction workers

[0003] At present, in order to solve the above problems, a variety of water-curable polyurethane waterproof coatings have been developed, such as the prior art CN200810018540.7, CN201310462014.0, but in these two inventions, most of the water-curable polyurethane waterproof coatings are single-component or two-component Increase the strength by increasing the resin content, increase the elongation and tear strength, so that the production cost is greatly increased; at the same time, because the polyurethane system is an oily system, although it contains an emulsifier, the emulsification effect of oily polyurethane and water is poor, and water is in the polyurethane system. Inhomogeneous dispersion in medium, resulting in too fast partial reaction between polyurethane and water, hard and brittle coating film, and affected performance; in addition, the operating time is short, and further adding coumarone resin and petroleum resin to reduce viscosity and prolong operating time, for example, with It brings about a series of problems such as non-environmental protection raw materials, and the price is much higher than that of ordinary polyurethane coatings, which restricts the wide-scale promotion of water-curing polyurethane coatings.