D - Textiles – Paper – 21 – H
Patent
D - Textiles, Paper
21
H
D21H 17/07 (2006.01) D21H 17/14 (2006.01) D21H 21/30 (2006.01)
Patent
CA 2713268
The present invention relates to a method for the production of paper from a suspension containing cellulosic fibers comprising adding to the suspension and/or to a formed paper prepared from the cellulosic suspension i) a nitrogen-containing organic compound separately and/or in conjunction with, ii) an aqueous dispersion of an acid anhydride and iii) at least one shading dye, draining the suspension on a wire to form a paper.
La présente invention concerne un procédé de production de papier basé sur une suspension contenant des fibres cellulosiques. Ce procédé consiste : à ajouter à la suspension et/ou à un papier formé préparé à partir de la suspension cellulosique i) un composé organique contenant de l'azote, seul et/ou conjointement avec ii) une dispersion aqueuse d'un anhydride acide et iii) un ou plusieurs colorants de nuançage; et à égoutter la suspension sur une toile afin d'obtenir un papier.
Igel Hubert
Liesen Jonas
Turunen Marie
Akzo Nobel N.v.
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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