Ciba Specialty Chemicals Corporation

Bernd Wockenfuss

Dieter Reinehr

Georges Metzger

Hans Kramer

Fabienne Cuesta

A method for the fluorescent whitening of cotton in a discontinuous process comprising contacting the cotton, I an aqueous bath having a pH value of 6 or less, with one or more compounds of the Formula (I) wherein Rrepresents an &#x2014;SOR, &#x2014;SOR, COM, &#x2014;COR, &#x2014;CONRR, &#x2014;CN or &#x2014;NOsubstituent, Ris &#x2014;NH, &#x2014;NH(C-Calkyl), &#x2014;N(C-Calkyl), &#x2014;NH(C-Chydroxyalkyl), &#x2014;N(C-Chydroxyalkyl), &#x2014;NH(C-Calkoxy)(C-Calkyl), &#x2014;N[(C-Calkoxy)(C-Calkyl)], NHC&#x2014;Calkylsulphonic acid, morpholineo, piperidino pyrrolidino, an amino acid or amino acid amide residue from which a hydrogen atom on the amino group has been removed, &#x2014;OC-Calkyl or &#x2014;OC-Chydroxyalkyl, Rand Reach, independently, represent hydrogen, C-Calkyl, C-Chydroxyalkyl or C-CalkoxyC-Calkyl and M is H, Na, Li, K, Ca, Mg, ammonium, or ammonium that is mono-, di-, tri- or tetrasubsituted by C-Calkyl, C-Chydroxyalkyl or a mixture thereof, some of which are new

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Lörrach, Germany

Bernd Wockenfuss