Лако-красочные материалы — производство

In general, high-solid resins are resin solutions in organic solvents that are required to be supplied at >70 % solid content at mana­geable viscosities. Since viscosity of resin solutions is very depen­dent on their MW, high-solid resins are designed with low MW. In order to obtain the desirable properties of coatings with these low MW resins, high functionality is required for cross-linking. Thus, typical high-solid resins have low MW and high functionality per unit weight. High-solid acrylic resins are prepared by using higher amounts of functional monomers (compared to conventional ther­mosetting acrylic resins), and MW is reduced by using a higher initiator concentration during solution polymerization. Thus, by controlling composition and MW, a wide range of high-solid acrylics is possible. High-solid hydroxyl functional acrylics are very widely used in high-solid two-component polyurethane coating formulati­ons for applications such as automotive clear coats.