Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
March 3, 2009
Patent Application Number
10537062
Date Filed
December 1, 2003
Patent Primary Examiner
Patent 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.
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