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:
Mar. 25, 1980
Filed:
May. 04, 1978
Walter Birke, Frankfurt am Main, DE;
Hans-Ulrich von der Eltz, Frankfurt am Main, DE;
Franz Schon, Frankfurt am Main, DE;
Hoechst Aktiengesellschaft, Frankfurt am Main, DE;
Abstract
In the process for the pad-dyeing or printing of materials consisting of, or containing, polyester or polyamide fibers or filaments, in which process the materials are padded or printed in common manner with aqueous baths or printing pastes of disperse dyestuffs, and the dyestuffs are subsequently fixed by the action of liquid or gaseous methylene chloride or both of the said phases of methylene chloride, the improvement that use is made of a dyestuff of the formula ##STR1## in which R.sub.1 stands for hydrogen, hydroxy, nitro or ##STR2## R.sub.2 and R.sub.3 each stand for hydrogen, chlorine or alkyl from 1 to 3 carbon atoms or an alkoxy group of from 1 to 3 carbon atoms, R.sub.4 represents hydrogen, chlorine, alkyl from 1 to 3 carbon atoms, an alkoxy group from 1 to 3 carbon atoms or --CH.dbd.CH--CH.dbd.CH-- forming the naphthalene ring, and R.sub.5 stands for hydrogen, alkyl from 1 to 3 carbon atoms or alkoxy from 1 to 3 carbon atoms, which dyestuffs have a solubility in methylene chloride of at least 2 g/l.