Curing stoving lacquers using a quinolinium sulfonate as...

C - Chemistry – Metallurgy – 08 – J

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402/1, 400/5150,

C08J 7/18 (2006.01) C09D 3/48 (1985.01)

Patent

CA 1204545

Curing stoving lacquers using a quinolinium sulfonate as curing catalyst. Abstract Quinolinium sulfonates of the formula I Image (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.

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