Aniline azo dyes from 1,2,3,4-tetrahydroquinoline and 2,3-dihydro-1,4-benzoxazine couplers containing sulfate alkyl groups
AssigneeEastman Kodak Company
InventorsMax A. Weaver, Ralph R. Giles
Life of this patent
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AssigneeEastman Kodak Company
InventorsMax A. Weaver, Ralph R. Giles
Estimating the term…
Disclosed are novel dyes which comprise aniline diazo moieties and certain aromatic amine couplers having sulfate groups. These dyes are substantially water soluble and are particularly useful for dyeing polyamide, wool and the like and exhibit, for example, excellent dyeability properties and fastness to light and gas. The dyes correspond to the general formula: ##STR1## wherein ring A may be unsubstituted or substituted with 1-3 of a variety of groups which themselves may be substituted such as alkyl, alkoxy, chloro, bromo, iodo, trifluoromethyl, thiocyano, cyano, phenylazo, acyl, and the like; R.sub.1 is a group such as alkyl, alkoxy, halogen, acylamido, alkylthio, and aryloxy; m is 0, 1, or 2; R.sub.2 represents the linking groups necessary to form a 1,2,3,4-tetrahydroquinoline or a 2,3-dihydro-1,4-benzoxazine structure, which may be substituted, in combination with the phenylene ring; Z is a linking group such as alkylene; and M is H.sup.+, Na.sup.+, K.sup.+, or NH.sub.4.sup.+.
The dye of the formula:
Dependencies are inferred from the claim text.