Nicca Chemical Co., Ltd.

Nicca Usa, Inc.

Kouji Midori

Yasuharu Mori

Nobuhiko Ueno

Juji Uchida

Masayuki Maeno

Shinichi Morinaga

A method of fixing cellulose fibers dyed with a reactive dye, which comprises a homopolymer containing a vinylamine structural unit, a copolymer containing from 5 to 90% by weight of a vinylamine structural unit and from 5 to 90% by weight of a diallylamine structural unit, a copolymer containing from 5 to 90% by weight of a vinylamine structural unit, from 5 to 90% by weight of structural unit of a vinyl compound copolymerizable with the vinylamine, or copolymer containing from 5 to 90% by weight of a vinylamine structural unit, from 5 to 90% weight of a diallylamine structural unit and from 5 to 90% by weight of a structural unit of a vinyl compound copolymerizable with vinylamine and diallylamine, and/or a salt of the homopolymer or copolymers.

Method of fixing cellulose fibers dyed with a reactive dye

The present invention provides a cationic polycondensate dye fixing agent prepared by reacting (a) a mono- or polyfunctional amine having at least one reactive --NH or --NH.sub.2 group, or a salt thereof, with (b) a polycondensate-forming cyano compound at a temperature of at least about 260.degree. C. The present invention also provides a process of improving the fastness of dyed materials using the cationic polycondensate dye fixing agent of the present invention.

Cationic polycondensate dye fixing agent and process of preparing the

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Fukui, Japan

Kouji Midori