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:
Sep. 06, 1977
Filed:
Sep. 30, 1975
Joachim Otten, Offenbach am Main, DT;
Helmut Troster, Konigstein, Taunus, DT;
Hoechst Aktiengesellschaft, Frankfurt am Main, DT;
Abstract
It has been found that dyestuffs of the formula ##STR1## in which p stands for an integer of from 1 to 6, and W represents, as a water-solubilizing group, the sulfo group, the sulfato group (--OSO.sub.3 H), the thiosulfato group (--S--SO.sub.3 H), the carboxyl group, the phosphato group (--OPO.sub.3 H.sub.2), the phosphonic acid group (--PO(OH).sub.2) or the phosphonic acid-semi-ester group of the formula --PO(OR)OH, wherein R represents an alkyl radical of from 1 to 5 carbon atoms, preferably the methyl or ethyl radical, are very suitable in dyeing and printing processes of synthetic polyamide fiber materials and yield brilliant and very fast dyeings and prints on these materials, especially even dyeings of textured polyamide fibers which have differences in stretching.