Light-sensitive compounds, light-sensitive mixture, and...

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G - Physics

03

C

96/165, 260/396.

G03C 1/56 (2006.01) G03F 7/022 (2006.01)

Patent

CA 1193275

Abstract of the Disclosure A light-sensitive mixture is described which contains a water-insoluble resinous binder, which is soluble or swell- able in aqueous-alkaline solutions, and a novel 1,2-naphtho- quinone-2-diazide-sulfonic acid ester of a dihydroxyacylo- phenone or of a dihydroxybenzoic acid ester of the formula I Image in which R1 is an alkyl or alkoxy radical, the carbon chain of which can be interrupted by ether oxygen atoms, R2 is a hydro- gen atom, an alkyl radical having 1 - 3 carbon atoms, or a chlorine or bromine atom and D is a 1,2-naphthoquinone-2- diazide-sulfonyl radical. The copying materials prepared from this mixture are particularly suitable for the preparation of printing plates which give long print runs and have a high light sensitivity. The compounds of the formula I are dis- tinguished by good solubility in customary coating solvents.

387961

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