Ciba Specialty Chemicals Corporation

Ciba-geigy Corporation

Basf Se Corporation

Werner Schreiber

Dieter Reinehr

Peter Rohringer

Josef Zelger

Andreas Burkhard

Erwin Marti

Hans Kramer

Hanspeter Sauter

Rolf Kuratli

Frank Bachmann

Claude Eckhardt

Albert Stehlin

Rainer Hans Traber

Vladimir Arnold

Michael Marky

Andr&eacute; Geoffroy

Andre Geoffroy

André Geoffroy

The present invention relates to a mixture of fluorescent whitening agents comprising 20 to 70% by weight of a compound of formula (1), 30 to 80% of a compound of formula (2) and 0.1 to 10% of a compound of formula (3), compositions containing the mixture and the user of the compositions for whitening synthetic fibers, in particular, polyester.

Mixtures of fluorescent whitening agents

The present invention relates to a mixture of fluorescent whitening agents comprising 20 to 70% by weight of a compound of formula (1), 30 to 80% of a compound of formula (2) and 0.5 to 5% of a compound of formula (3), compositions containing the mixture and the use of the compositions for whitening synthetic fibers, in particular polyester.

The present invention provides a hydrate of the 4,4&prime;-di-triazinylamino-2,2&prime;-di-sulfostilbene compound having the formula:

Triazinylaminostilbene compounds

Multifunctional textile auxiliary formulations

The present invention provides a hydrate of the 4,4'-di-triazinylamino-2,2'-di-sulfostilbene compound having the formula: ##STR1## in which M and M.sub.1 independently represent hydrogen, an alkaline-, an alkaline earth metal or ammonium, x is a number within the range of from 1 to 30, and the crystal form of the hydrate (I) being characterized by an X-ray diffraction pattern which is essentially as set out in the accompanying FIGS. 1 to 11; or a mixture containing one or more of the hydrates of the 4,4'-di-triazinylamino-2,2'-di-sulfostilbene compound having the formula (I); processes for the preparation of the new hydrates; and the use of the new hydrates for the preparation of concentrated aqueous formulations of fluorescent whitening agents.

A detergent base which is obtainable from the reaction of an ethylenically unsaturated sulfonic acid or carboxylic acid or anhydride thereof with a nonionic surfactant of the formula

Multifunctional detergent base

A very pure, dust-free commercial form of 4,2',4'-trichloro-2-hydroxydiphenyl ether with little odor is prepared by diazotizing 4,2'4'-trichloro-2-aminodiphenyl ether, boiling the diazonium salt and purifying the reaction product. The pure, dust-free and odor-free commercial form is obtained by separating off the acid aqueous phase of the reaction mixture, rendering the mixture containing 4,2'4'-trichloro-2-hydroxydiphenyl ether and 2,4,8-trichlorodibenzofuran alkaline, extracting it several times with an inert water-immiscible solvent, either after removal of the organic solvent by steam distillation and precipitation of the by-product 2,4,8-trichlorodibenzofuran or directly, and then adjusting the pH to 3 to 10; subsequently, the highly volatile constituents are removed from the 4,2',4'-trichloro-2-hydroxydiphenyl ether melt which has separated out, the melt is subjected to molecular distillation and the distilled melt is introduced into an aqueous dispersion of crystalline 4,2',4'-trichloro-2-hydroxydiphenyl ether, this dispersion simultaneously being subjected to wet grinding. Filtration and drying gives a granular-like ready-to-use commercial form.

Process for the preparation of a very pure commercial form of

Benzazolyl compounds of the formula ##STR1## wherein R.sub.1 and R.sub.2 are specific substituents, X is oxygen or R.sub.3 N--, Q is a radical of the formula ##STR2## wherein R.sub.4 denotes specific substituents, and A is 2,5-furylene, 2,5-thenylene or a bridge member which contains at least one double bond between 2 carbon atoms or is the direct bond. These compounds are obtained by condensation of organic carboxylic acids with aminobenzenes in diphenyl ether or a mixture of diphenyl ether and diphenyl.

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Basel, Switzerland

Werner Schreiber