Лако-красочные материалы — производство

The performance properties of thermosetting coatings, which rely on a chemical reaction between different functional groups to give a cross-linked polymer network, are dependent on the extent of the cross-linking reaction and hence the cross-link density. Similarly to other organic chemistry reactions, cross-linking reactions may be significantly accelerated at higher temperatures or by the use of a catalyst. Apart from decreasing the reaction time and temperature of curing, some catalysts may also be helpful in selectively cataly­zing required chemical cross-linking reactions and minimizing undesirable competing side reactions. Catalysts for a wide range of thermosetting resin systems are commercially available, but this chapter will cover examples of catalysts important for some com­monly used cross-linking systems.