Ciba-geigy Corporation

Hanspeter Baumann

Walter Kunz

Karl Gatzi

Bernhard Gloor

Urs Buchel

Helmut Hohenegger

Novel 2-amino-thiadiazole derivatives of the formula ##STR1## are described. In the formula, R.sub.1 is hydrogen or C.sub.1 -C.sub.4 alkyl; R.sub.2 is C.sub.1 -C.sub.4 alkyl; R.sub.3 is hydrogen or the group --CO--R.sub.4, in which R.sub.4 is alkoxyalkyl, C.sub.3 -C.sub.6 cycloalkyl, or is C.sub.2 -C.sub.4 alkenyl each of which is unsubstituted or mono- or polysubstituted by halogen, or is furyl, thienyl, pyridyl or phenyl, each of which is unsubstituted or mono- to tetrasubstituted by C.sub.1 -C.sub.4 alkyl, halogen, cyano, nitro, alkoxy, alkylthio, alkylsulfonyl or amino. These compounds possess useful bactericidal properties and can be used in particular for controlling phytopathogenic bacteria without damaging the treated cultivated plants. In comparison to aminothiadiazoles of the prior art, the compounds of this invention cause no tetratogenic side-effects.

3-(N-1,3,4-Thiadiazolyl-2)-aminoalkyl-alkyl-acrylates and use thereof as

Described is a process for the production of solid dustfree preparations of water-soluble dyes and optical brighteners, which process comprises subjecting the pulverulent dyes or optical brighteners, together with a melt or a solution of ethylene carbonate or propylene carbonate, to a dynamic treatment. The preparations obtained have in particular the advantage that the dust-binding effect is retained undiminished over a long period of time, and that they are completely soluble when used in aqueous baths of dyes or optical brighteners.

Growing community of inventors

Lausen, Switzerland

Hanspeter Baumann