| abstract |
Invention Patent: <B> "CURABLE COMPOSITION BASED ON POLYMERS CONTAINING FREE CARBOXYL GROUPS" <D>. Curable compositions, which comprise the following components: (A) a polymer component consisting of one or more of the following components: polymers based on acrylate monomers and / or methacrylate monomers containing free carboxyl groups, and polyesters terminated in carboxyl; (B) a crosslinker for component (A) selected from the group consisting of: (B1) one or more than one compound having a molecular weight of less than 800 and containing at least two groups (2- oxo -1, 3 -dioxolan- 4-yl) methyl per molecule, and (B2) a mixture consisting of one or more than one compound having a molecular weight of less than 800 and containing at least two groups (2- oxo -1, 3- dioxolan-4-yl) methyl per molecule and one or more than one epoxy resin, in at least 60 percent of the total number of groups (2-oxo -1,3-dioxolan-4-yl) methyl and groups epoxy of the mixture being (2-oxo-1,3-dioxolan-4-yl) methyl groups; (C) a catalyst to accelerate the cross-linking reaction between components (A) and (B), and (D) a solvent for components (A), (B) and (C); the molar ratio of free carboxyl groups to the total number of methyl groups (2-oxo -1, 3-dioxolan-4-yl) and epoxy groups in the composition being 0.3 to 3, have particularly good storage stability and are therefore, suitable for use in the form of a component, for example, as coating agents. |