Abstract: Benzene diazonium compounds of the general formula ##STR1## wherein R.sub.1 is alkylamino, dialkylamino, cycloalkylamino, dicycloalkylamino, cycloalkylalkylamino, aralkylamino, diaralkylamino, alkylaralkylamino, cycloalkylaralkylamino, arylamino, diarylamino, alkylarylamino, cycloalkylarylamino, acoylamino, acoylalkylamino, acoylcycloalkylamino, acoylaralkylamino, acoylarylamino, aroylamino, aroylalkylamino, aroylcycloalkylamino, aroylaralkylamino, aroylarylamino, morpholino, piperidino, triazinyl, alkylthio, hydroxyalkylthio, cycloalkylthio, aralkylthio, or arylthio; R.sub.2 is alkyl, aralkyl, aryl, or alkoxyalkyl; R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7 and R.sub.8 may be the same or different and are hydrogen, alkyl, cycloalkyl, aralkyl, aryl, or halogen, at least one of the substituents R.sub.3 to R.sub.8 not being hydrogen; and X is an anion.

Abstract: The invention relates to organic polymers which can be crosslinked under the action of light and which are suitable for carrying out photomechanical processes. These polymers are photochemically considerably more sensitive than known comparable polymers and their sensitivity can additionally also be further increased by means of a combination with sensitizers. The molecular weight is at least 1,000. The polymers contain, as light-sensitive groups, groups of the formula I ##STR1## wherein R and R.sub.1 independently of one another denote alkyl groups with at most 4 C atoms, or R and R.sub.1 conjointly denote the remaining part of a 5-membered to 6-membered carbocyclic ring.

Abstract: The invention relates to organic polymers which can be crosslinked under the action of light and which are suitable for carrying out photomechanical processes. These polymers are photochemically considerably more sensitive than known comparable polymers and their sensitivity can additionally also be further increased by means of a combination with sensitisers. The molecular weight is at least 1,000. The polymers contain, as light-sensitive groups, groups of the formula I ##STR1## wherein R and R.sub.1 independently of one another denote alkyl groups with at most 4 C atoms, or R and R.sub.1 conjointly denote the remaining part of a 5-membered to 6-membered carbocyclic ring.

Abstract: The invention relates to organic polymers which can be crosslinked under the action of light and which are suitable for carrying out photomechanical processes. These polymers are photochemically considerably more sensitive than known comparable polymers and their sensitivity can additionally also be further increased by means of a combination with sensitizers. The molecular weight is at least 1,000. The polymers contain, as light-sensitive groups, groups of the formula I ##STR1## wherein R and R.sub.1 independently of one another denote alkyl groups with at most 4 C atoms, or R and R.sub.1 conjointly denote the remaining part of a 5-membered to 6-membered carbocyclic ring.

Abstract: The invention relates to organic polymers which can be crosslinked under the action of light and which are suitable for carrying out photomechanical processes. These polymers are photochemically considerably more sensitive than known comparable polymers and their sensitivity can additionally also be further increased by means of a combination with sensitizers. The molecular weight is at least 1,000. The polymers contain, as light-sensitive groups, groups of the formula I ##STR1## wherein R and R.sub.1 independently of one another denote alkyl groups with at most 4 C atoms, or R and R.sub.1 conjointly denote the remaining part of a 5-membered to 6-membered carbocyclic ring.

Abstract: Photopolymerizable material for the preparation of stable polymeric images, is provided which is characterized in that it contains, on a carrier, at least one layer composed of1. ethylenically unsaturated monomers which are soluble in water or water-alcohol mixtures and which contain one or more terminal double bonds and at least one polar atom grouping with a lone electron pair,2. a photoinitiator which forms together with an electron donor a photo-redox pair, especially a diazine compound which forms a photo-redox pair with the ethylenically unsaturated monomer (1) or the binder (3a), or with both of them,3. as a matrix for the monomer (1), a swellable reaction product of at least oneA. macromolecular binder which is soluble in water or water-alcohol mixtures and which has at least one polar atom grouping containing a lone electron pair, withB. a hardener, the hardener being different from the monomers of the component (1), and optionally4.

Abstract: In photopolymerization, the polymerization process is activated or initiated by radiation, for example in the region of ultraviolet or visible waves. According to the present invention ethylenically unsaturated compounds can now be polymerized advantageously with the aid of a new catalyst system which consists of a diazine compound, preferably a quinoxaline and an electron donor, which together act as a photoredox pair.