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:
Jun. 17, 1980
Filed:
Jul. 07, 1978
Visvanathan Ramanathan, Basel, CH;
Ciba-Geigy Corporation, Ardsley, NY (US);
Abstract
Azo dyes which are free from acid water-solubilizing groups and correspond to the formula ##STR1## wherein two radicals Z represent groups of the formula --NR'R' and one of the radicals Z represent a group of the formulae --NR'R', OR'' or --S--R'', wherein R', R' and R''each represents hydrogen, aryl, alkyl, aralkyl, cycloalkyl, an aliphatic or a heterocyclic radical and R' and R' are able to form a ring which contains the amino nitrogen, and the radicals --NR'R' may be the same or different, R is alkyl, substituted alkyl, cycloalkyl or substituted cycloalkyl, n is 1 or 2, Y represents a radical of the formulae --CN or --CONH.sub.2, and D is the radical of an aromatic or heterocyclic diazo component; the nucleus A containing three double bonds if n is 1 and two double bonds if n is 2. The new dyestuffs dye polyester fibres in yellow and red shades.