公开(公告)号：DE4412390A1

公开(公告)日：1995-10-19

申请号：DE4412390

申请日：1994-04-11

Applicant: HOECHST AG

Inventor： JAEKEL FRANK DR ,  REINHARDT GERD DR ,  KLEBER ROLF DR ,  AHRENS HENDRIK ,  VOLKWEIN GUENTER

IPC: D06L3/02 ,  D06L4/12 ,  D06L4/70 ,  C07D223/10 ,  C07D227/087

Abstract: A process for bleaching raw textiles comprises treating the material with an aq. bleach bath contg. H2O2 and a N-acyl-lactam of formula (I) as bleach activator. In (I) n = 3-5; and R = 1-5C alkyl. Pref. the mole ratio of (H2O2):(I) in the bath is (1-5):1, pref. (1.1-1.5):1, w.r.t. active CO gps. in (I), and the bath liq. has a pH of 5-13, pref. 7-9. The process may be operated as a continuous process using an impregnation method, pref. comprising wetting and impregnating, laying down cold for 0.5-24 hrs. or heating to 95-120 degrees C. with steam, and then washing. Or a discontinuous extn. method may be used, in which the material is wetted and impregnated with the bleach in the cold or at 40-130 degrees C., the wt. of the bleach bath being 3-50 times that of the unbleached material.

公开(公告)号：CA2146713A1

公开(公告)日：1995-10-12

申请号：CA2146713

申请日：1995-04-10

Applicant: HOECHST AG

Inventor： JAEKEL FRANK ,  REINHARDT GERD ,  KLEBER ROLF ,  AHRENS HENDRIK ,  VOLKWEIN GUENTER

IPC: D06L3/02 ,  D06L4/12 ,  D06L4/70

Abstract: The present invention provides a process for bleaching textile raw material with the aid of hydrogen peroxide by treating the textile raw material with an aqueous bleaching liquor including hydrogen peroxide and a bleach activator, which comprises using as the bleach activator an N-acyllactam of the formula I (I) where n is from 3 to 5, and R1 is C1- C5 - alkyl