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US 4,543,103 AGranted
Method of dyeing a glass substrate with a polycationic dyestuff
AssigneeSandoz Ltd.
InventorJurg Troesch
Life of this patent
Estimating the term…
Abstract
A glass substrate is dyed or printed with a water-soluble polycationic dyestuff in the absence of a size or binding agent. The resulting dyeings have good rubbing fastnesses.
Claims24
A process for dyeing or printing a glass substrate which comprises treating the substrate with a dyeing liquor or printing paste containing a water-soluble polycationic dyestuff having, per dyestuff molecule, at least 1.3 cationic groups selected from quaternary nitrogen atoms and protonated nitrogen atoms, said number of cationic groups being at least one greater than the number of anionic groups per molecule.
Dependencies are inferred from the claim text.