Colourtex Industries Limited

Pankaj Desai

Kiyoshi Himeno

Nikhil Desai

Jay Patel

The present invention is directed to a disperse dye of formula (1) Wherein, X, Y and Z are, independently, hydrogen, halogen, cyano, nitro or SOF; Wherein at least one of X, Y and Z is SOF. Ris hydrogen, methyl, hydroxyl or NHR; Ris hydrogen, chloro or methoxy; Ris hydrogen, (C-C)-alkyl or &#x2014;CH(CH)COOCHCN; Ris hydrogen, (C-C)-alkyl or &#x2014;CH(CH)COOCHCN; Ris &#x2014;COCH, &#x2014;CO CH, &#x2014;SOCHor SOCH; n and m are independently 0,1 or 2, with the proviso: &#x2014;When, Y and Z both are Cl, Ris other than methyl. When, Ris Hydrogen and R, Rboth are alkyl, Ris selected from NHSOCHor NHSOCH. Disperse dyes of Formula (I) have excellent washing fastness and light fastness on polyester fiber and polyester blends. 

Disperse dyes

Novel disperse azo dyes of formula (I), and processes for preparation thereof. These dyes possess superior washing fastness, sublimation fastness and light fastness. 

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Gujarat, India

Pankaj Desai