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:
Apr. 17, 1979
Filed:
Feb. 03, 1978
Ludwig Schlafer, Fischbach, DE;
Konrad Opitz, Liederbach, DE;
Hoechst Aktiengesellschaft, Frankfurt am Main, DE;
Abstract
The present invention provides liquid, aqueous dyeing preparations of a reactive dyestuff which in form of the free acid corresponds to the formula ##STR1## each containing 5 to 35% by weight of one of the aforesaid dyestuffs and furthermore 1 to 5% by weight of buffer substances which are not capable of reacting chemically with the reactive group and thus reducing the dyestuff yield, and having a pH-value of from 3 to 7, said dyeing preparations being suitable for the dyeing and printing of fiber materials on the basis of wool, silk, polyamide and natural or regenerated cellulose, according to the process which is common for reactive dyestuffs.