Roehm Gmbh & Co Kg

Roehm Gmbh Chemische Fabrik

Sabine Servaty

Guenther Ittmann

Werner Geyer

Manfred Krieg

Rolf Neeb

Hermann Seibert

Norbert Rau

The invention describes a polymer with high transmission for UV rays, this transmission being preserved even after prolonged exposure to UV light (tanning lamps). The polymer is further characterized by a low residual monomer content (determined as methyl methacrylate).

Material for solar benches

The invention relates to a method for producing block-shaped and plate-shaped polymethacrylimide foamed materials by copolymerizing methylacrylic acid and methylacryl nitrile, by subjecting the copolymerizate to a post-polymerization and cyclization in order to form polyimide, and by converting the same into a foamed material. The invention is characterized in that the copolymerization is carried out in the presence of a mixture containing at least three initiators with graduated half-life periods. The polymerization can be controlled especially well and yields polymerizate plates with thicknesses of up to 80 mm which can be easily foamed. The invention makes it possible to produce filling materials, especially plates and blocks containing electrically conductive particles.

Method for producing block-shaped polymethacrylimide foamed materials

By copolymerisation of compounds which are acid or have a hydroxy or epoxy function in a casting resin with a filler contents of between 10 and 80%, moulded parts on a polymethylmethacrylate basis are obtained which pass the B1-test even without addition of fire-retardant agents and in addition present improved mechanical properties.

Molded plastic parts made of casting resins and inorganic fillers, presenting improved mechanical and thermal properties and improved flame-resistance

Polymethacrylimide foams are prepared by a method, comprising: preparing a mixture consisting of

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Grosslittgen, Germany

Sabine Servaty