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. 27, 1990
Filed:
Dec. 16, 1986
Applicant:
Inventors:
Hans-Ulrich von der Eltz, Frankfurt am Main, DE;
Karl-Heinz Rostermundt, Eschborn, DE;
Klaus Turschmann, Hofheim am Taunus, DE;
Assignee:
Hoechst Aktiengesellschaft, Frankfurt, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09B / ;
U.S. Cl.
CPC ...
8549 ; 8638 ; 8917 ; 8DIG / ;
Abstract
Trichromatic dyeings with acid dyes which exhaust from strongly acidic liquors have weaknesses with respect to wet fastness, which are due to insufficiently fast components (blue, red). It has been found, according to the invention, that by replacing the insufficiently fast acid dyes by reactive dyes of the vinylsulfonyl type and retaining the method of dyeing under strongly acidic conditions the wet fastness level of the exhaust dyeings can be improved while the levelness obtained remains as good.