The molecular structure of conventional polyurethane resin contains -nh-co-, which makes the resin have poor temperature resistance, poor waterproofness, poor wear resistance and other shortcomings, and the silicone resin has a special structure and high silicon oxidation bond energy, and the polyurethane is prepared into silicone polyurethane by special process, which greatly improves its performance;
Silicone modified polyurethane has good weather resistance, wear resistance, corrosion resistance, waterproof, electrical insulation, high temperature resistance, low temperature curing fast, curing after curing and other characteristics. The resin has low viscosity, high functionality and high hardness, and is used in polyurethane lagging with high temperature resistance requirements, such as high-temperature printing rubber rollers (hot stamping cylinders).
Rubber roller is a common equipment component used in packaging, printing, coating, laminating and other processes. Different materials have different characteristics and applications, so choosing the right material is essential to improve production efficiency and product quality. At present, high-temperature printing rubber rollers are used in the market, and silicone modified polyurethane resin has excellent wear resistance, oil resistance and elasticity, which can withstand high load working pressure and long-lasting wear resistance. In the high-speed operation of packaging and coating equipment, it shows excellent weather resistance, wear resistance, corrosion resistance, waterproofing, electrical insulation, high temperature resistance, low temperature curing fast, curing after curing and other characteristics.
Silicone polyurethane resins offer a high degree of practicality, and the solvent resistance and temperature resistance of polyurethane rollers make them ideal for complex process applications. In particular, the extreme temperature environment is very stable when combined with the use of various solvents. Compared with other printing roller coatings, such as rubber materials, they are more sensitive to chemicals and greases; Silicone polyurethane has better application performance. In addition, silicone polyurethane resins can also be used to formulate coatings with high temperature resistance, mainly in the automotive, construction, electronics, aerospace and other fields.