| 摘要 |
<p>Curing stoving lacquers using a quinolinium sulfonate as curing catalyst. Quinolinium sulfonates of the formula I (I), wherein R1 is C1-C8-alkyl, C1-C4-alkyl substituted by halogen, hydroxyl or C1-C4-alkoxy, or it is C2-C8-alkenyl, C7-C9-phenylalkyl or C5-C8-cycloalkyl, R2, R3, R4 and R5 independently of one another are each hydrogen, C1-C4-alkyl, halogen, -CN, -COO(C1-C4-alkyl), -CHO, hydroxyl, C1-C4-alkoxy, an acyloxy group R7COO-, a group R8-CH=CH-, C7-C9-phenylalkyl or phenyl, R6 is C1-C12-alkyl, C6-C10-aryl which is unsubstituted or mono- or polysubstituted by C1-C12-alkyl, C1-C4-alkoxy, halogen or a group R7CONH-, or it is fluorine, NH2 or CF3, and R7 and R8 independently of one another are each C1-C4-alkyl or phenyl, are suitable as latent curing catalysts for acid-curable stoving lacquers. There is formed by irradiation with W light the actual acid catalyst, which renders possible curing at relatively low stoving temperatures.</p> |
