Polyurethane waterproof coating is formed by addition polymerization of isocyanate, polyether prepolymer containing isocyanate groups, together with the catalyst, anhydrous chemicals, anhydrous fillers, solvents, etc., made by mixing and other processes processing single-component polyurethane waterproof coating. 


 At present, the variety of waterproof material on the market, domestic, import, joint venture; high-end, mid-range, low-grade. 

 Home improvement commonly used waterproof material is a polyurethane waterproof coating of petroleum asphalt, environmentally friendly polyurethane waterproof coating and polymer cement waterproof coating. 

 Polyurethane waterproof coating because of its excellent physical and chemical properties, is now widely used in water engineering. Which is the most widely used tar polyurethane applications. However, with the 

 Social development and people's living standards improved, people began to pay more attention to environmental protection and health. Coal tar contains a large number of aliphatic and aromatic compounds, with a strong pungent odor, which anthracene, naphthalene, and other ingredients harmful to human health. Tar type polyurethane pollution of the environment has drawn increasing attention. I hope the manufacturers to develop environmentally friendly polyurethane waterproof coating; the end of 1998, released on the limit and eliminate the tar polyurethane waterproof coating. Construction Committee also encourages the development, recommend the use of six kinds of environmentally friendly polyurethane waterproof coating; 

 (1) single-component polyurethane waterproof coating; 

 (2) colored polyurethane waterproof coating; 

 (3) inorganic filler polyurethane waterproof coating; 

 (4) water-curable polyurethane waterproof coating; 

 (5) petroleum asphalt base polyurethane waterproof coating; 

 (6) petroleum resin, polyurethane waterproof coating; 

 The first four because of its high cost and a small proportion in the market, the latter two has become the direction of the enterprise development, and applications on the market. Now advocate the promotion of non-tar polyurethane waterproof coating is mainly based on the requirements of environmental protection, 

 Tar-and the distinction of non-tar polyurethane waterproof coating 

 An odor 

 Tar type: pungent odor, smell coating; 

 Non-tar type: only a slight odor or odorless coating no obvious odor. 

 2 coating the combustion method 

 Tar type: a pungent odor and thick black smoke and there are black floc generation, and rapid combustion; 

 Non-tar type: pine scent or a slight odor, resulting in a small amount of black smoke, slow burning, leaving non-combustible fire source. 

 3 mixed method 

 Tar type: mixed initial viscosity, ie, mixing, thickening phenomenon; 

 Non-tar type: Mixed viscosity is essentially the same, non-thickening phenomenon. 

 Above three methods, the basic qualitative judgments tar non-tar polyurethane waterproof coating, which can stop the tar polyurethane coating of fake and non-tar type to enter the market. 

 Polymer cement waterproof coating (JS paint) acrylic polymer emulsion and cement as the main raw material, add other admixtures in the system of two-component waterborne architectural waterproof coating, with the characteristics of hardness and softness, both polymers extension of the coating, waterproof, high strength cement matrix, and the ease of the advantages of wet grass-roots bond. Of the coating with water as a dispersing agent to solve the environmental pollution and human health hazards caused by tar, asphalt and other solvent-based waterproof coating 
 .