PROCESS FOR IMPROVING THE FASTNESS OF DYEINGS WITH BASIC DYES ON CELLULOSE SUBSTRATES

摘要

IMPROVEMENTS IN OR RELATING TO ORGANIC COMPOUNDS The fastness properties of basic dyeings on cellulosic substrates are improved by treating the substrate with a fixing agent comprising a precondensate or mixture of A) the reaction product of an amine with cyanamide, di cyandiamide, guanidine or biguanidine or B) a quaternary polyalkylene polyamine with C) formaldehyde and/or D) an N-methylol compound optionally together with E) a catalyst, e.g. MgCl2. The fixing agents are normally applied as an aftertreatment, with a subsequent heat-curing step.