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US 7,497,971 B2Granted
Mixtures of fluorescent whitening agents
AssigneeCiba Specialty Chemicals Corporation
InventorsJean-Jacques Donzé, Marie Meyberger, Michael Milde, Volker Papendick, Josef Zelger
Life of this patent
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Abstract
The present invention relates to a mixture of fluorescent whitening agents comprising 11 to 20% by weight of a compound of formula (1), and 80 to 89% by weight of a compound of formula (2), wherein R1 denotes hydrogen, C1-C6alkyl, C5-C14aryl or C6-C24aralkyl and X is a bivalent radical of formula (3), (4) or (5) compositions containing the mixture and the use of the compositions for whitening synthetic fibers, in particular, polyester.
Claims13
A mixture of fluorescent whitening agents comprising 13 to 17% by weight of a compound of formula
- and 83 to 87% by weight of one or more compounds of formula
- wherein R1 denotes hydrogen, C1-C6alkyl, C5-C14aryl or C6-C24aralkyl and X is a bivalent radical of formula (3), (4) or (5)
Dependencies are inferred from the claim text.