Cellulosic materials are dyed with reactive dye by pretreating the fabric with a polycationic polymeric agent which is desirably also polynucleophilic. The agent can be a polyquaternary amine material especially a poly(DADMAC) or polyvinylpyridine, particularly one including nucleophilic sites such as primary amino groups, e.g. polyallylamine/DADMAC copolymers and polyvinylpyridines quaternsied with omega -aminoalkyl groups. The dyes can react with the nucleophilic centres so dyebath exhaustion can be driven by dye fixation rather than substantivity to the substrate. The need to use of salts to drive substantivity can be obviated and post dyeing washing to remove unreacted/hydrolysed dye is much simplified. Material dyed by the method has the good wash fastness properties of materials dyed using reactive dyes. A wide variety of cellulosic substrates can be dyed including lyocell fibre materials and blend/union materials with polyamides.
申请公布号
WO9837270(A1)
申请公布日期
1998.08.27
申请号
WO1998GB00499
申请日期
1998.02.18
申请人
IMPERIAL CHEMICAL INDUSTRIES PLC;COLLINS, GEOFFREY, WILLIAM;BURKINSHAW, STEPHEN, MARTIN;GORDON, ROY
发明人
COLLINS, GEOFFREY, WILLIAM;BURKINSHAW, STEPHEN, MARTIN;GORDON, ROY