Back to results
US 4,364,845 AGranted
Concentrated aqueous solutions of sulfo group-containing fluorescent brighteners which are stable on storage
AssigneeCiba-Geigy Corporation
InventorWerner Fringeli
Life of this patent
Estimating the term…
Abstract
Concentrated aqueous solutions of sulfo group-containing fluorescent brighteners, which are stable on storage, containing a stilbene fluorescent brightener substituted by sulfo groups and a lactam of the formula ##STR1## in which m is 0 or an integer between 1 and 9, and their use for the fluorescent brightening of high molecular weight organic material.
Claims9
A concentrated aqueous solution, which is stable on storage, of a sulfo group-containing fluorescent brightener, which contains a stilbene fluorescent brightener substituted by sulfo groups and a lactam of the formula ##STR30## in which m is 0 or an integer between 1 and 9.
Dependencies are inferred from the claim text.