Patents

cured coating films free

November 19, 2007

Patent No. U.S. 7,205,029 B2
BASF Corp. has obtained a patent for a method of making a cured coating film having an average film build of at least 2.0 mils/50.8 microns, which is substantially free of popping defects, comprised of applying a curable coating composition to a substrate to form a coated uncured substrate having an average film build of at least 2.0 mils/50.8 microns. The curable coating composition is comprised of an anti-popping component, a film-forming component, and a crosslinking component, wherein anti-popping component has from 12-72 carbon atoms, is substantially free of any heteroatoms, is not a crystalline solid at room temperature and comprises a mixture of two or more structures selected from the group consisting of aliphatic structures for anti-popping component, aromatic-containing structures for anti-popping component, cycloaliphatic-containing structures for anti-popping component, and mixtures thereof, wherein at least one of the two or more structures is either a cycloaliphatic-containing structure or an aromatic-containing structure, subjecting the coated uncured substrate to conditions sufficient to form a continuous cured coating film having an average film build of at least 2.0 mils/50.8 microns and which is substantially free of popping defects, wherein the anti-popping component comprises a least two functional groups reactive with one or both of film-forming component and crosslinking component.