G - Physics – 03 – F
Patent
G - Physics
03
F
96/58
G03F 7/32 (2006.01)
Patent
CA 1168500
Hoe 80/K 021 Abstract of the Disclosure This invention relates to a developer solution for the de- velopment of exposed light-sensitive reproduction layers compris- ing a water-insoluble binder and a water-insoluble diazonium salt polycondensation product. As the essential constituents, this developer solution contains glycol ethers, glycol esters and water, in detail - about 30 to 80% of a compound of the formula Image wherein n = 1 to 4 and m = 1 to 5; about 3 to 30% of a com- pound of the formula Image wherein R1 and R2 are acyl groups containing 1 to 4 carbon atoms, or one of the two groups is a hydrogen atom and R3 is a hydro- gen atom or a methyl group; about 0 to 15% of 1,3-dioxolane-2- one or 4-methyl-1 ,3-dioxolane-2-one; about 0 to 20% of a poly- hydric alcohol; about 0 to 10% of an organic or inorganic salt which is soluble in the solvent mixture; and about 5 to 45% of water. The invention relates further to a process for the devel- opment of negative-working reproduction layers based on (a) water-insoluble diazonium salt polycondensation products and (b) binders which are insoluble in water and in dilute aqueous alka- line solutions. In the process, the exposed reproduction layer is treated with the above-specified developer solution in order to dissolve the unexposed layer areas.
373302
Fetherstonhaugh & Co.
Hoechst Aktiengesellschaft
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