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Redispersibility of disperse dyes containing polymeric dispersants
Author(s) -
Schejbalová Hana,
Odvárka Jaroslav,
Záda Václav
Publication year - 1998
Publication title -
journal of the society of dyers and colourists
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.297
H-Index - 49
eISSN - 1478-4408
pISSN - 0037-9859
DOI - 10.1111/j.1478-4408.1998.tb01921.x
Subject(s) - dispersant , dyeing , chemical engineering , disperse dye , materials science , chemistry , organic chemistry , chromatography , dispersion (optics) , physics , optics , engineering
Dispersing agents are used during the manufacture of disperse dyes to ensure standard dyeing properties. Polymeric dispersing agents have advantages over classical dispersants in that they are are colourless and easily degraded and do not have to be present in such large quantities. Redispersibility is a potential problem and we have therefore investigated the redispersibility of CI Disperse Red 60 (pure colorant) achieved with classical and polymeric dispersants. We have developed a calculation procedure that will provide some basis characteristics of the studied system and make it possible to choose the composition of mixture of components used for preparation of disperse dye at which the relative coefficient of redispersibility ( K r ) is optimised. We found that the K r of dye prepared with classical dispersants was 10–40 while that of dye prepared with polymeric dispersant was 0.05–7.0.