Method or dyeing using phase change dyestuffs

Abstract

Method is set forth of dyeing a material comprising forming a solution having a basic salt of a water soluble dye of the formula: ##STR1## wherein n is 0 or 1; m is 0 or 1; m=1 when n=0; p=0 when m=1; p=1 when m=0; the subscripts 1 and 0 indicating, respectively, the presence and absence of the substituent subscripted; Y is CR.sub.2 COO, CR.sub.2 CR.sub.2 COO or CR.sub.2 CR.sub.2 CR.sub.2 COO; each R is independently hydrogen, methyl, ethyl, phenyl or phenyl substituted with methyl, ethyl, halo, cyano, ethynyl or nitro; G is CR, CR.sub.2 CR, CRCR.sub.2, CR.sub.2 CR.sub.2 CR, CR.sub.2 CRCR.sub.2 or CRCR.sub.2 CR.sub.2 ; E is OH, SH or NH.sub.2 ; when G of GE includes more than one carbon atom the substituent E is attached to a carbon atom selected such that the two end carbon atoms of G are attached, one to the Dye and the other to the nitrogen; and Dye indicates a color imparting moiety; positioning the aqueous solution adjacent to a material; and applying sufficient dry heat to the material to convert the dye to a hydrophobic form thereof having the formula: ##STR2## Also set forth are certain novel dyestuffs of the formulas (II), (III), (IV) and (V) including, in particualr, dyestuffs of the formula: ##STR3## wherein X is O, S or NH along with a method of synthesizing dyestuffs of the formula (VI).

Dependencies are inferred from the claim text.