Light-sensitive mixture

Details Light-sensitive mixture Light-sensitive mixture

G - Physics

03

C

96/160, 260/396.

G03C 1/10 (2006.01) G03F 7/022 (2006.01)

Patent

CA 1113108

Abstract of the Disclosure A positive-working light-sensitive mixture for the prepara- tion of printing plates, in particular planographic printing plates, and photoresists is described, which comprises an alkali-soluble binder, preferably a novolak, and an o-naphthoquinone diazide of the formula Image (I) in which R1, R1', R2 and R2' are identical or different and repre- sent hydrogen, chlorine or bromine atoms, alkyl, alkoxy or alkoxy- alkyl groups having 1 to 6 carbon atoms or alkenyl groups having 2 to 6 carbon atoms, R3 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, R4 represents a hydrogen atom, an optionally substituted alkyl group, the carbon chain of which can be interrupted by ether oxygen atoms, an optionally substitut- ed cycloalkyl group having 5 to 16 carbon atoms or an optionally substituted alkenyl group having 2 to 16 carbon atoms, n repre- sents zero or an integer from 1 to 4 and D represents a 1,2- naphthoquinone-2-diazide-sulfonyl group. The new naphthoquinone diazides are distinguished by a high solubility in organic solvents and by good reprographic properties.

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