E.i. Dupont De Nemours and Company

Reimund Simon

Dietmar Dudek

Ursula Annerose Kraska

Udo Weikart

Ly Phuoc Do

Johannes Bohn

Johann Pistor

Harald K Herget

Traugott Sschmutz

Karl-Heinz Wiedemann

Kurt Lehnunh

A photopolymerizable composition for the preparation of flexographic printing forms for corrugated board direct printing comprising a radial (polystyrene-polybutadiene) X block copolymer, with X&equals;Sn or Si and n&equals;2 or 4, with an average molecular weight (M ) of 80,000-300,000, a molecular weight distribution (M /M ) of 1.00-1.40, a content of di- block copolymers of less than 15% by weight, which is extended with up to 50% by weight of a paraffinic oil.

Photopolymerizable composition for the production of flexographic printing forms for corrugated board printing

A process for recycling exposed and/or unexposed photopolymer flexographic printing plate containing a photopolymerizable recording layer and a support, said process comprising (a) separating the recording layer from the support and comminuting the material and (b) adding the material to a photopolymer mixture is described. The process reduces waste problems, is more environmentally friendly and is used to prepare photopolymerizable flexographic printing plates containing less raw materials.

Recycling the recording layer of flexographic printing plates

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Birstein, Germany

Reimund Simon