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. 03, 1986
Filed:
May. 01, 1985
Rolf Fikentscher, Ludwigshafen, DE;
Heinrich Mertens, Frankenthal, DE;
Klaus Reincke, Wachenheim, DE;
Michele Vescia, Limburgerhof, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
Textile materials of natural polyamides or nylons, dyed with a dye containing acid groups, are after-treated with a dilute aqueous solution of a cationic condensate which is obtained by reaction of (a) piperazine or a derivative of piperazine with (b) a bifunctional crosslinking agent, such as an epihalohydrin, in a molar ratio of from 1:0.5 to 1:1.1, and quaternization of the condensate with benzyl chloride, from 0.15 to 1.0 mole of benzyl chloride being employed per equivalent of nitrogen in the component (a) during the quaternization. This after-treatment improves the wetfastness of the dye.