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:
Sep. 23, 1986
Filed:
May. 13, 1985
Hans-Ulrich Berendt, Allschwil, CH;
Paul Schafer, Riehen, CH;
Ciba-Geigy Corporation, Ardsley, NY (US);
Abstract
Textile cellulose material is dyed or in particular printed with vat dyes by applying to the cellulose material in the absence of air a foamed aqueous preparation which, in addition to the dye, alkalis, reducing agent, foam-forming agent, preferably also contains a homopolymer or copolymer of acrylamide or methacrylamide or in particular a graft polymer which is obtained from an adduct of an alkylene oxide, preferably propylene oxide, on an at least trihydric aliphatic alcohol, for example glycerol, and acrylamide or methacrylamide. The dyed or printed cellulose material is if desired subjected to a heat treatment, for example steaming, and is then oxidized to develop the color. The use of the foamed preparations makes it possible to obtain deep level dyeings and crisp prints without the use of thickeners; at the same time the textile materials thus obtained have excellent handle.