Hoechst Aktiengesellschaft

Helmut Mengler

Gunter Rosch

Erich Schinzel

Thomas Martini

Otto Smerz

Gunter Hohlfeld

Brighteners for detergents consisting of a mixture of 4,4'-bis-(2-morpholino-4-anilino-1,3,5-triazinylamino)-stilbene-2,2'-disul fonic acid-di-Na salt and from 5 to 50% by weight, calculated on said brightener, of another brightener of the formula ##STR1## in the above formula, M is an alkali metal cation, preferably sodium, X is a group of the formula --COR.sub.2 or --SO.sub.2 R.sub.3, R.sub.2 being C.sub.1 -C.sub.8 -alkyl and R.sub.3 being C.sub.1 -C.sub.5 -alkyl, C.sub.4 -C.sub.8 -cycloalkyl, phenyl or toluyl, Y is hydrogen or C.sub.1 -C.sub.5 -alkyl, A is C.sub.3 -C.sub.6 -alkylene, R.sub.1 is hydrogen, C.sub.1 -C.sub.5 -alkyl, C.sub.4 -C.sub.8 -cycloalkyl, or a group of the formula ##STR2## and Z is an anilino group, a chloroanilino group or a morpholino group. Said brightener mixtures are color-stable and do not show any green discoloration even after a prolonged storage in a moist atmosphere.

Color-stable brighteners for detergents

Novel pyrazolines are obtained by condensation of substituted propionphenones or vinyl-phenyl-ketones with substituted phenyl hydrazines. The products are useful as optical brighteners of a great variety of the shade of their fluorescence and of an improved fastness to light.

3-[3',4'-Dichloro-6'-alkyl-phenyl]-.DELTA. 2-pyrazoline derivatives and

1,5-Diaryl-3-styryl pyrazolines, which are obtained by condensation of a distyryl ketone and an aliphatic 4-hydrazino-phenyl sulfone, are useful as optical brighteners, especially in admixture with known 1,3-diaryl pyrazoline brighteners.

Styryl-pyrazoline compounds

Novel pyrazolines are obtained by condensation of substituted propiophenones or vinyl-phenyl-ketones with substituted phenyl hydrazines. The products are useful as optical brighteners of a great variety of the shade of their fluorescence and of an improved fastness to light.

3-[3',4'-Dichloro-6'-alkyl-phenyl]-.DELTA..sup.2 -pyrazoline derivatives

Condensation compounds of 2 mols of cyanuric acid with 1 mol of 4,4'-diaminostilbene-2,2'-disulfonic acid, at least two mols of a lower alkylene diamine which is acylated at one nitrogen atom and, optionally, another two mols of another amine or an alcohol or a phenol are useful as optical brighteners, especially for cellulosic and polyamide materials.

Growing community of inventors

Frankfurt-am-Main, Germany

Helmut Mengler