PU self-drying paint having strong adhesive force for metal glass surface

Abstract

The invention provides PU air-dried paint which needs only one-time construction and has strong adhesive force to a metal or glass surface. The PU air-dried paint contains component A, component B and component C, wherein the component A is main paint, the component B is solidifying agent and the component C is solvent containing active monomer respectively, and the component A, the component B and the component C are mixed together according to the weight percent of 2:1-1.5:2-3. The main paint takes epoxy acrylic resin as film forming matter, the solidifying agent is HDI-TDI composite solidifying agent with a solid content of 50 percent, and the active monomer is acrylate phosphate ester. The PU air-dried paint has high paint film gloss and good paint film fullness, can be strongly adhered to the stainless steel or glass surface, has good water resistance, acid and alkali resistance, wear resistance and the like, can be rapidly dried at a low temperature of 50-80 DEG C and can also be dried by air at normal temperature, is especially suitable for being painted on the surfaces of daily necessities and craftworks which take stainless steel or glass as substrates.

Description

technical field [0001] The present invention relates to a kind of paint, especially to a kind of polyurethane paint (PU self-drying paint) that can be dried by itself at normal temperature, more specifically to a kind of metal substrate such as stainless steel or smooth glass substrate surface with strong adhesion PU self-drying paint. Background technique [0002] Due to the corrosion-resistant and anti-oxidation properties of stainless steel, glass and other materials, there are more and more products based on stainless steel and glass in the daily necessities and handicraft markets. In order to decorate the surface of these products or make the product have better wear resistance and weather resistance, it is usually necessary to paint the surface of the formed product. The surface of stainless steel and glass is inert, and the adhesion of general paint to its surface is not ideal. At present, there are two solutions, one is to use baking paint, and the other is to pre-t...

AI Technical Summary

Problems solved by technology

The application utilizes that acrylate phosphate is a highly active photopolymerizable monomer, and monomer polymerization occurs under ultraviolet irradiation to form a polymer with high adhesion to metals. However, the application formula is general, and the coating film obtained by using this formula The combination with the substrate is not ideal, and UV coatings can form a good paint surface for plate-shaped profiles, but for irregular-shaped daily necessities or handicrafts, because ultraviolet rays cannot be fully and uniformly irradiated to all sides of the product, the formed The adhesion of the coating film to the surface of the product is not uniform, which will cause some paint layers to be firmly bonded to the product, and some paint layers are easy to fall off.