Substituted heterocyclic methine dyes

Abstract

Abstract Disclosed are disperse dyes for the dyeing of synthetic fibers such as cellulose acetate, triacetate, polyamide and especially polyester and its blends, which have the general formula ##STR1## in which R 1 and R 2 may be the same or different and are selected, for example, from hydrogen, aryl, benzyl, cyclohexyl, and C 1 -C 6 alkyl optionally substituted by Cl, CN, OC 2 H 4 OC 2 H 5 , C 1 -C 4 alkoxy, aryl, ##STR2## NHCONHPh, OCONHPh, phthalimido, succinimido or mercaptobenzthiazolyl, and R 1 and R 2 may form a 5- or 6-membered ring with the ##STR3## which ring may or may not contain a S, N, or O atom; R 3 is H, Cl, Br, C 1 -C 4 alkyl or C 1 -C 4 alkoxy; R 2 and R 3 may form a 5 or 6 membered ring preferably substituted by 1-3 methyl groups; R 4 is H, Cl, Br, C 1 -C 4 alkyl or C 1 -C 4 alkoxy; and R 5 is selected from 3-pyridyl, 3-benzisothiazolyl, 2-benzothiazolyl, 2-benzoxazolyl, 2-quinoxalyl, 2-quinazolinonyl, 2-1,3,4-oxadiazolyl, 2-1,3,4-thiadiazolyl and 2-thienyl, which R 5 heterocycles may be substituted by Cl, Br, NO 2 , CN, aryl, aryl substituted by Cl, Br, NO 2 or CN, C 1 -C 4 alkyl or COOR 6 wherein R 6 is C 1 -C 4 alkyl or aryl.

Inventors

• 👤 Keith Hunt

Bibliographic Details