Patent ID: 6056787
Filing Date: 2000-05-02
Classification: D06L,D06M

Abstract:
A process for the pretreatment of crude cotton, jute, regenerated cellulose, silk or wool fibers, or mixtures of said fibers with synthetic fibers or of yarns, woven fabrics, knitted fabrics or nonwovens containing said crude fibers or mixtures by bleaching using a bleach and a bleaching regulator composition wherein said bleaching regulator composition comprises an iminodisuccinic acid, one of its salts or mixtures thereof with one another, of the formula ##STR3## in which R.sup.1, R.sup.2, R.sup.3 and R.sup.4 independently of one another denote H, Li, Na, K, NH.sub.4, H.sub.3 NCH.sub.2 CH.sub.2 OH, H.sub.2 N(CH.sub.2 CH.sub.2 OH).sub.2 or HN(CH.sub.2 CH.sub.2 OH).sub.3,R.sup.5 and R.sup.6 both represent hydrogenR.sup.7 represents H, CH.sub.2 CH.sub.2 OH, CH.sub.2 CH.sub.2 CH.sub.2 OH, CH.sub.2 CH(OH)CH.sub.3, CH.sub.2 COOR.sup.8 or CH.sub.2 CH.sub.2 COOR.sup.8, wherein R.sup.8 independently of R.sup.1 has the same meaning as R.sup.1.