Ciba Specialty Chemicals Corporation

Volker Papendick

Michael Milde

Jean-Jacques Donzé

Georges Metzger

Ted Deisenroth

Rainer Hans Traber

Josef Zelger

Hauke Rohwer

Hans Kramer

Ullrich Menge

Serge Hauger

Marie Meyberger

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 Rdenotes hydrogen, C-Calkyl, C-Caryl or C-Caralkyl 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. 

Mixtures of fluorescent whitening agents

A process for improving the sun protection factor (SPF) of cellulosic fibre materials and blends thereof, which comprises contacting said materials with at least one compound of the formula (1) in which M is hydrogen, an alkali metal atom, ammonium or a cation formed from an amine; Rand R' independently of each other are hydrogen, hydroxy, optionally substituted alkyl, 4-morpholinyl, &#x2014;NH&#x2014;R, &#x2014;N(R)or &#x2014;O&#x2014;Rwherein Ris optionally substituted alkyl or optionally substituted aryl, Ris a group of formula (2) wherein X is &#x2014;O&#x2014; or &#x2014;NH&#x2014; and Ris C-C-alkyl which carries at least one hydrophilic substituent and R&#x2032; has the meaning of Ror R.

Process for improving the sun protection factor of cellulosic fibre material

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Steinen, Germany

Volker Papendick