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US 6,936,078 B2Granted
Fluorescent brightener pigment compositions
AssigneesCiba Specialty Chemicals Corporation, Albemarle Corporation
InventorsPeter Bischof, Christiane Hutter, Claudio Puebla
Life of this patent
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Abstract
The invention relates to a fluorescent brightener pigment and the use of said pigment, which is derived from formaldehyde, for improving the whiteness of paper or textiles, or for incorporation in detergent compositions.
Claims13
A fluorescent brightener pigment obtainable by addition of a fluorescent building-block prior to or during preparation of the pigment, said pigment being derived from formaldehyde, wherein the fluorescent building-block is of formula
- wherein R1 and R2, independently, represent —NH2 or —NHC1-C4alkyl and M is hydrogen, an alkaline or alkaline earth metal, ammonium, mono-, di-, tri- or tetraC1-C4alkylammomium, mono-, di-, tri- or tetraC2-C4hydroxyalkylammonium or mixtures thereof.
Dependencies are inferred from the claim text.