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:
Jan. 01, 1980
Filed:
Sep. 01, 1977
Joseph Koller, Reinach, CH;
Manfred Motter, Dornach, CH;
Peter Moser, Binnigen, CH;
Ulrich Horn, Basel, CH;
Pierre Galafassi, Rixheim, FR;
Ciba-Geigy Corporation, Ardsley, NY (US);
Abstract
Described is a process for the level dyeing of polyacrylonitrile materials, in which process there is used for dyeing polyacrylonitrile materials that have varying substantivity an aqueous dye liquor containing at least one migrating cationic dyestuff and electrolyte, as well as, optionally, at least one migrating cationic retarder and further additives. This process renders possible a level dyeing of all fibre types of polyacrylonitrile materials by one and the same dyeing method. Generally, no addition of a migrating cationic retarder is necessary. Only in the case of a light-colored dyeing is a very minor addition thereof required. Particularly suitable migrating cationic dyestuffs are those having a more or less delocalized positive charge, the cation weight of which dyestuffs is smaller than 310, the parachor smaller than 750 and the log P (relative lipophil property) smaller than 3.6.