FUNDAMENTAL STUDIES ON DYEING WITH DISPERSE DYES

Abstract

It was previously reported by us1)-4), that α-CH…X-Dye type hydrogen bonding plays an important role in the interaction between aminoanthraquinone type disperse dyes and ester type fibres.In order to obtain an answer to “What is X in this bonding?”, the interaction between dyes and esters, amines and phenols are discussed in this paper, from the view point of the influence of dye-structure on (-ΔF) value.1) In the interaction between dyes and esters, (-ΔF) values are not concerned with the number and the state of amino-group, and show constant values depending only on esters.It means that anthraquinone makes an important contribution to the interaction, that X is anthraquinone itself and that α-CH…X-Dye type hydrogen bonding can be written over again to α-CH…A. Q. -S type hydrogen bonding. (A. Q.; anthraquinone, S; substituent)2) In similar manner to esters, the interaction between dyes and amines can be interpreted only when X is anthraquinone itself.3) In the interaction between dyes and phenols, (-ΔF) values depend on the dye-structures, and the dependence suggests that an important contribution can be ascribed to α-CH…X-Dye type hydrogen bonding.In this case, a distinct answer on X can not be obtained, but it does not contradict α-CH…A. Q. -S tyde hydrogen bonding.4) (-F) values of the interaction between anthraquinone and ester and phenol are nearly equal to those of dyes, and it means that X is anthraquinone itself.5) From the results 1)_??_4), it is concluded that α-CH…A. Q. -S type hydrogen bonding makes a good part of contribution to disperse dyeing.