Nippon Kayaku Kabushiki Kaisha

Junji Odani

Yasuo Shirasaki

Shigeyuki Watanabe

Eiichi Ogawa

The present invention provides a disazo compound which in a free acid form is represented by the formula (1) and which has high ability to dye cellulosic fibers and attains efficient dyeing with satisfactory reproducibility; and a method of dyeing cellulosic fibers with the compound. Also provided are: a reactive dye composition comprising a compound represented by the formula (1) and a specific red reactive dye and/or a specific blue reactive dye; and a method of dyeing cellulosic fibers with the composition.In the formula, Rand Reach represents hydrogen atom or methoxy group; Rand Reach represents hydrogen atom, methyl group, acetylamino group, ureido group, etc.; and m is 2 or 3.

Disazo compound, reactive dye composition, and method of dyeing cellulose or cellulose-containing fibers

Water-soluble azo compounds which, in the free acid form, are represented by the formula: ##STR1## wherein one of X and Y is hydrogen and the other is --SO.sub.3 H; one of A and B is hydrogen and the other is --SO.sub.3 H; each of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 is independently hydrogen, methyl group, ethyl group, methoxy group, ethoxy group, acylamino group or ureido group; and each of R.sub.5 and R.sub.6 is independently hydrogen, methyl group, ethyl group, methoxy group, ethoxy group, acylamino group, chlorine, hydroxyl group or carboxyl group, and a method for dyeing cellulose fibers, blended yarn fabrics of cellulose fibers with other kinds of fibers, particularly with polyester fibers, using the said compounds.

Growing community of inventors

Kounosu, Japan

Junji Odani