E.i. Dupont De Nemours and Company

Hans L Schroder

Manfred Schober

Photosensitive composition comprising, inter alia, thermoplastic-elastomer block copolymer binders and addition-polymerizable monomer having terminal ethylenically unsaturated end groups wherein at least one monomer has one acrylate or methacrylate group, said monomer forms a homopolymer having a solubility parameter in the range between 7.6 and 9.6 and a glass transition temperature below 0.degree. C. and, further wherein, at least one monomer has more than one acrylate or methacrylate groups, said monomer forms a homopolymer having a solubility parameter in the range between 9.6 and 12.

Flexographic printing reliefs having increased flexibility

A process is described for cementing together the edges of photopolymerizable flexographic printing elements for printing plates that contain as an elastomeric binder a block copolymer whose polymer blocks are polystyrene and polyisoprene and/or polybutadiene or their copolymers.

Process for the cementing of photopolymerizable flexographic printing

A process for the ozone protection of photopolymer flexographic printing plates using alcohol soluble polyamides, which are applied onto the exposed and developed surface of the flexographic printing plate in a mixed solution comprising n-propanol and n-butanol, e.g., 10 to 90% and 90 to 10% by weight, respectively.

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Reinheim, Germany

Hans L Schroder