Patent ID: 6508957
Filing Date: 2003-01-21
Classification: C09K

Abstract:
A method of inspecting the surface of a body comprising the steps of:(a) covering a surface with a composition comprising a compound exhibiting edge fluorescence, (b) inspecting the thus covered surface with ultraviolet light for visible light, such being indicative of faults in the surface, wherein the compound exhibiting edge fluorescence is a maleimide of formula (I) whereinR1 and R2 independently from each other stand for wherein Q1 stands for hydrogen, halogen, phenyl, â€”Eâ€”C1-C8alkyl, â€”E-phenyl, wherein phenyl can be substituted up to three times with C1-C8alkyl, halogen, C1-C8alkoxy, diphenylamino, â€”CH&boxH;CHâ€”Q2, wherein Q2 stands for phenyl, pyridyl, or thiophenyl, which can be substituted up to three times with C1-C8alkyl, halogen, C1-C8alkoxy, â€”CN, wherein E stands for oxygen or sulfur, and wherein R21 stands for C1-C8alkyl, phenyl, which can be substituted up to three times with C1-C4alkyl, C1-C4alkoxy, or dimethylamino, and R22 and R23 independently from each other stand for hydrogen, R21, C1-C8alkoxy, or dimethylamino, or â€”NR4R5, wherein R4 and R5, independently from each other stand for hydrogen, phenyl, or C1-C8alkyl-carbonyl, or â€”NR4R5 stands for a five- or six-membered ring system,and R3 stands for allyl, wherein Q3 stands for hydrogen, halogen, C1-C8alkoxy, or C1-C8alkyl-amido, unsubstituted or substituted C1-C8alkyl, unsubstituted or up to three times with halogen, â€”NH2, â€”OH, or C1-C8alkyl substituted phenyl,and Z stands for a di- or trivalent radical selected from the group consisting of substituted or unsubstituted cyclohexylene, triazin-2,4,6-triyl, C1-C6alkylene, 1,5-naphthylene, whereinZ1, Z2 and Z3, independently from each other stand for cyclohexylene or up to three times with C1-C4alkyl substituted or unsubstituted phenylene,and wherein R6 and R7, independently from each other, stand for n stands for 1, 2 or 3, and m stands for 1 or 2.