E.i. Dupont De Nemours and Company

Basf Aktiengesellschaft

Michael Buback

Eckhard Weidner

Peter Klostermann

Christian Schwede

Michael Juergens

Marcus Petermann

Sabine Beuermann

Stefan Rohde

The invention relates to a method of preparation for polymers, particularly binders for powder coatings and powder coatings which are prepared as a solution in a supercritical fluid phase. Binders for powder coatings are prepared from at least two ethylenically unsaturated monomers capable of free-radical or ionic copolymerization, and conventional initiators and regulators in supercritical fluids, whereby polymerization is carried out in the homogeneous phase, and, after the reaction has ended, either the composition or the phase parameters of the mixture are altered so that at least two phases with supercritical fluid are obtained, and the phase containing predominantly polymer is separated and the polymer is separated as a powder from the sc fluid by depressurization or the polymer phase is further processed under supercritical phase conditions to the powder coating.

Process for the preparation of powder coating compositions

A product which is suitable for producing films and moldings and for use as a coating agent comprises a cyano-containing copolymer A based on ethylene composed of

Preparation of cyano-containing copolymers based on ethylene

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Bovenden, Germany

Michael Buback