Dyeing and printing of water-swellable cellulose material and blends thereof with synthetic fibres, by means of disazo dyes derived from amino-pyrazole

Abstract

This invention relates to a class of disazo dyes that are useful to dye and print water-swellable cellulose material and blends thereof with synthetic materials, and, in particular, to dye and print polyester-cotton blends. More particularly, the process of this invention relates to a process or method for dyeing and printing fabrics of water-swellable cellulose material and blends thereof with synthetic materials, in particular polyester-cotton mixed fibres, such process comprising the dyeing and printing of the material in the presence of water and of a high-boiling solvent, capable of maintaining cellulose in the swollen state at the application temperature, with disazo dyes having general formula (I): ##STR1## wherein: X.sub.1 =a hydrogen, alkyl or alkoxyl having 1 to 4 atoms of carbon, chlorine, bromine, --CN, --NHCOR.sub.1, --NHCO--Ar, --COOR, --CON(R.sub.1).sub.2, --NO.sub.2 ; X.sub.2 =a hydrogen, alkyl or alkoxyl having 1 to 4 atoms of carbon, chlorine, bromine, --NHCOR.sub.1, --NHCO--Ar; X.sub.3 =an alkyl or alkoxyl having 1 to 4 carbon atoms, or --NHCOR.sub.1 or --NHCO--Ar; Y=H, an alkyl or alkoxyl having 1 to 4 atoms of carbon, chlorine, bromine; W=a hydrogen or alkyl C.sub.1-4 ; R=an alkyl C.sub.1 -C.sub.4 ; R.sub.1 =a hydrogen or alkyl C.sub.1-4 ; Ar=a phenyl optionally substituted; m and m are integers from 1 to 3.

Dependencies are inferred from the claim text.