Gas Fading of Some Aminoanthraquinonoid Disperse Dyes

Abstract

The behavior of gas fading of some aminoanthraquinonoid disperse dyes on eellulose acetate and triacetate films has been examined in terms of the specific fading constant to gas. The effect of substituents on the fading to gas and light of aminoanthraquinones were discgssed.A concentration dependence on thegas fading of dyes, ie., resistance to gas fading of the dyes increases with their increasing conentration on the substrate is shown in this series. 5, 6-'and 6, 7-benzo derivatives of 1, 4-diamino(and dimethylamino)anthraquinones are more resistant to gas fading and photofading than the compounds of original strncture.1-Amino-2-methoxy-4-amino(and hydroxy)anthraquinones and 1-amino-2-alkylthio-4-anilino-anthraquinones fade to gas much less and fade te.light more than corresponding-2-unsubstituted' frivatives. Gas fading and photofading of 1-amino-2-carbamoyl-4-methylaminoanthraquinon is more sensitive than those of 1-amino-4-methylaminoanthraquinon.