The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 03, 1978
Filed:
Jan. 09, 1976
Henri Riat, Arlesheim, CH;
Gert Hegar, Schonenbuch, CH;
Ciba-Geigy Corporation, Ardsley, NY (US);
Abstract
Tetrareactive disazo dyestuffs of the formula ##STR1## wherein D represents a benzene radical containing at least one sulpho group; K represents a radical of 1-amino(or aminobenzoylamino)-8-naphthol-3,6-disulphonic acid, of 1-amino(or aminobenzoylamino)-8-naphthol-4,6-disulphonic acid, of 2-amino(or aminobenzoylamino)-5-naphthol-7-sulphonic acid, of 2-amino(or aminobenzoylamino)-8-naphthol-6-sulphonic acid, of 2-amino(or aminobenzoylamino)-5-naphthol-1,7-disulphonic acid, or of 2-amino(or aminobenzoylamino)-8-naphthol-3,6-disulphonic acid; B represents an aliphatic or aromatic radical; R.sub.1, R.sub.2 and R.sub.3 each independently represent hydrogen or alkyl having 1 to 6 carbon atoms; X represents chlorine, bromine or fluorine; and Y represents hydrogen, low-molecular alkyl or alkoxy, acetylamino, halogen, carboxy or sulpho; said dyestuffs being useful in dyeing materials such as silk, leather, wool, superpolyamide fibers, superpolyurethanes and fibrous cellulose containing materials, the dyeings being characterized by high depth of color and good fastness to light and wet processing, such as washing.