Coating agent system based on Bi catalyst and aromatic carboxylic acid

摘要

The present invention relates to the coating systems comprising component (A)-(D) and optionally other components, in first choice, all components (A)-(D) and if present, other optional components exist apart from each other, in other words, each component does not mix with each other. In the second selection of coating system of the present invention, on the contrary, said components can also be completely or at least partially mutually mixed. As fruit component is at least partly mutually mixed, then this means that for example component (C) is mixed with component (A), while this mixture of component (B) and (D) and (A) and (C) dividually exist. However, optionally, component (B) or (D) can also be mixed with a part of component (C). In addition, the mixture of the mixture and (B) of (A) and (C) or (D) and (C) also may include at least one optional components, such as solvent. Component (A) includes at least one containing polyol, has not more than 9mg KOH/g accordingly containing the acid value of polyol, and component (B) includes at least one containing polyisocyanate compound. On the contrary, component (C) is the catalyst comprising bismuth as metal component, wherein catalyst exists as the salt of at least one organic acid, and component (D) is aromatic carboxylic acid. The aromatic carboxylic acid of component (D) and the organic acid of component (C) are different from each other. The other components that may be present in coating system of the present invention include such as coating additive (F), hydroxy-containing compounds (G), pigment (H) and/or solvent (J).