Negatively working photocrosslinkable layers developable with aqueous alkaline solutions.

摘要

1. Photo-sensitive layer comprising a film-forming polymer which is crosslinkable under the effect of light, can be developed in an aqueous alkaline solution, and contains cinnamoyl groups, characterized in that the polymer corresponds to the general formula -(CH2 -CH2 )u -(A)v - in which u denotes 0 to 70 mol% v denotes 30 to 100 mol%and A denotes see diagramm : EP0010225,P14,F1 and wherein R1 denotes hydroxyl, alkyl with 1 to 4 carbon atoms, aryl or alkoxy with 1 to 4 carbon atoms, and the groups representing R1 contained in the polymer can be identical or different and the content of hydroxyl groups amounts to at least 30 mol%, R2 denotes a hydrogen atom or alkyl with 1 to 4 carbon atoms, and the radicals representing R2 contained in the polymer can be identical or different and the amount of hydrogen atoms amounts to at least 30 mol %, R3 denotes a halogen atom, and NO2 group, a CF3 group, alkyl with 1 to 4 carbon atoms or alkoxy with 1 to 4 carbon atoms, R4 denotes alkylene with 1 to 6 carbon atoms or arylene, R5 denotes a hydrogen atom when u>0 and a hydrogen atom, a CH3 CO group or a C6 H5 CO group when u=0, m denotes 0 to 3 n denotes 1 to 3 a denotes 20 to 100 mol% b denotes 0 to 50 mol% c denotes 0 to 30 mol%.