Basf Aktiengesellschaft

Gunther Schulz

Herbert Naarmann

Eberhard Schupp

Gunnar Schornick

Harm Wiese

John Lynch

Bernhard Schlarb

Rudolf Vyvial

Maria G Rau

Gunter Wallbillich

Walter Mann

Manfred Zurger

An aqueous polymer emulsion obtainable by free radical polymerization of monomers in aqueous emulsion in the presence of a polymeric protective colloid contains, as components,

Preparation of emulsifier-free aqueous polymer emulsions

Carboxylates of hydroxyl-containing polymers are prepared by reacting a finely dispersed hydroxyl-containing polymer with a carboxylic anhydride in the heterogeneous phase in the presence of a tertiary amine as a catalyst by a method in which an N-alkylimidazole, where alkyl is of 1 to 10 carbon atoms, is used as the catalyst.

Preparation of carboxylates of hydroxyl-containing polymers

Photosensitive recording materials which are suitable for the production of printing plates and relief plates and possess a photopolymerizable relief-forming layer which can be developed with water and is based on a polyvinylalcohol/monomer mixture contain, as a binder in the said layer, a polyvinylalcohol derivative which is obtained by reacting polyvinylalcohol with an acylating agent which has groups which are polymerizable by free radicals, the reaction being carried out in the heterogeneous phase, in an aprotic dispersant, using the acylating agent in an amount which corresponds to not less than twice the molar amount required to achieve the desired degree of acylation.

Photosensitive recording material suitable for the production of

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Ludwigshafen, Germany

Gunther Schulz