For relatively simple polyurethane coatings, polyurethane catalysts still have certain limitations in their shape, gloss, water resistance and hardness during industrial production and application. Therefore, it is possible to try to develop modified polyurethane coatings to improve their performance. performance level. At the current level of technology, there are two types of modification methods that can be applied to polyurethane catalyst materials: one is through chemical intervention, so that polyurethane coatings can have two or more properties; the second is through physical modification. In the way of method intervention, two or more resin materials with complementary characteristics are mixed, so that polyurethane coatings can have diversified properties.
Among them, for silicone materials, the material has a series of characteristics and advantages such as non-corrosion, non-toxicity, flame resistance, ozone resistance, weathering resistance, electrical insulation, etc., and has a very good application value in the modification and processing of polyurethane coatings.
A blocked isocyanate cross-linking system has been developed, and the IPDI curing system blocked by caprolactam is commonly used, and its curing temperature is above 170 °C. This high-temperature curing is conducive to the high leveling of the coating film, and it is a variety that does not emit volatile by-products. Previous reports also pointed out that trying to combine silicone materials with polyurethane coatings and applying appropriate methods for modification processing can obviously overcome the performance defects of polyurethane materials, which is of very definite value for expanding the application field of polyurethane materials. At the same time, the chemical structure of polysiloxane is relatively special, showing excellent stability, biocompatibility, electrical insulation and high and low temperature resistance. Since the 1940s, it has been widely used in industrial production practice. During the research and development of modified polyurethane catalyst materials, it is possible to use polysiloxane as a soft segment to synthesize polysiloxane-polyurethane block copolymers to highlight the advantages of both polyurethane and polysiloxane demonstrate the outstanding advantages of the modified polyurethane coating in terms of surface enrichment, dielectric properties and biocompatibility, and have a very large application space and development potential.
At present, polyurethane catalyst is a new type of green energy, and wind power generation is undoubtedly a hot spot in the global energy market in recent years. Wind power is developing rapidly in the country, and the related industries are also rapidly heating up. Multinational coating suppliers still occupy a dominant position in the wind power blade coating market, and coating companies have also carried out R&D work and made significant progress, and some companies have already occupied a place in the market.