Positive-working photosensitive mixture and photolithographic copying material produced therefrom with o-quinone dialide sulfonyl ester and azo coupler

Claim 1

A positive-working photosensitive, mixture consisting essentially of: about 10% to 30% by weight, based on the nonvolatile constituents of a photosensitive sulfonic acid ester of o-quinine diazide with an aromatic hydroxyl compound having a molecular weight of about 800 to 8,000 daltons, a polymeric water-insoluble binder which is soluble or at least swellable in aqueous-alkaline solutions in an amount sufficient to produce a uniform film, and a coupler compound which can form an azo coupling with the o-quinine diazide, wherein the coupler is a compound of the formula I ##STR5## R 1 , R 2 are identical or different and denote alkyl, cycloalkyl, alkoxy, alkyl-, aryl- or acylamino, alkoxycarbonylamido, heteroaryl or a heteroarylimino of the formula III ##STR6## wherein U,V,W are identical or different, and denote in each case one of the following groups: methylene, which may be unsubstituted or substituted by alkyl, aryl, phenyl, carboxyl, or carboxylamide; carbonyl, carbonylimino, sulfur, selenium, oxygen, amino, imino, which may be unsubstituted or substituted by alkyl or aryl; and R 8 and R 9 are identical or different and denote hydrogen or alkyl wherein the equivalent ratio of coupler to o-quinine diazide compound is about 0.5 to 3.