Лако-красочные материалы — производство

Thermosetting acrylic resins contain reactive functional groups that can be used to obtain cross-linked films after application. These resins are prepared by a very similar process to that used for TPAs by using functional acrylic monomer as one of the co-monomers. Typical functional monomers used for such resins are 2-hydroxye- thyl acrylate for — OH groups, acrylic or methacrylic acid for — COOH groups, and glycidyl methacrylate for epoxy group functionaliza­tion. Since these resins are used in coatings in conjunction with cross-linker, their MW and degree of cross-linking increases during the curing process. Therefore, these functional acrylic resins do not necessarily have to be of high MW. Such resins are therefore prepared with a low MW (and hence lower viscosity) and a specific functional group content. High functional group content resins after cross-linking generally yield coatings that are harder, are more resistant to water and solvents, and have greater film strength. The product data sheets often list information about their functional group content, non-volatile content, and type of solvent used to help formulators in selection of such resins.