Fluorescent pigments
AssigneeCiba Specialty Chemicals Corporation
InventorsIain Frank Fraser, Ian Alexander Macpherson, David Macdonald Smith, Simon Martyr, Greig Chisholm, Stephen John Coughlin
Life of this patent
Estimating the term…
Abstract
Azo compounds of formula (I), wherein X stands for halogen, in particular for chlorine, or C1-C4alkoxy, in particular for methoxy, Y stands for —CH2— or —O—, R1 and R2, independently from each other, stand for hydrogen, C1-C8alkyl, or C6-C14aryl, which may be substituted up to three times with C1-C8alkyl, C1-C4alkoxy or halogen, a process for their preparation and their use as fluorescent compounds, in particular as solid fluorescent compounds, such as for special effect printing, sectrity printing or in the opto-electronic field.
Claims5
A fluorescent azo pigment formula I
- wherein X stands for halogen or C1-C4alkoxy, Y stands for —CH2— or —O—, R1 and R2, independently from each other, stand for hydrogen, C1-C8alkyl, or C6-C14aryl, which may be substituted up to three times with C1-C8alkyl, C1-C4alkoxy or halogen, with the proviso that X is not methoxy if both R1 and R2 are methyl and V is —O—.
Method of pigmenting a substrate, which comprises applying to or incorporating into said substrate an azo pigment formula (I)
- wherein X stands for halogen or C1—C4alkoxy, Y stands for —CH2— or —O—, and R1 and R2, independently from each other, stand for hydrogen, C1-C8alkyl, or C6-C14aryl, which may be substituted up to three times with C1-C8alkyl, C1-C4alkoxy or halogen as fluorescent compounds.
Dependencies are inferred from the claim text.