C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
C07D 335/04 (2006.01) C09B 57/14 (2006.01) G03C 1/73 (2006.01) G03F 7/09 (2006.01) G03F 7/095 (2006.01) G11B 7/244 (2006.01)
Patent
CA 2058393
FL/6-18487/A Photochromic benzothioxanthone oxides, process for their preparation and the use thereof Abstract of the Disclosure Compounds of formula I or III or mixtures thereof Image (I), wherein R is unsubstituted C6-C14aryl or C6-C14aryl which is substituted by C1-C12alkyl,C1-C12alkoxy, C1-C12alkylthio, phenyl, benzyl, -CN, -CF3, halogen or -COOR3, x is 1 or 2, and R1 is H, linear or branched C1-C12alkyl, C2-C12alkenyl or C2-C12alkynyl, C7-C16aralkyl, C8-C16alkaralkyl, -CH2COOR3 or C1-C12acyl, wherein R3 is H, C1-C18alkyl, cyclohexyl, cyclopentyl, phenyl, C1-C12alkylphenyl, benzyl or C1-C12al- kylbenzyl, are reversible photochromic systems which can be used for contrast formation, light absorption or for the reversible optical storage of information.
Finter Jurgen
Fischer Walter
Spahni Heinz
Ag Ciba-Geigy
Fetherstonhaugh & Co.
Finter Jurgen
Fischer Walter
Spahni Heinz
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