Th. Goldschmidt Ag

Huels Aktiengesellschaft

Goldschmidt Ag

Goldschmidt Gmbh

Manfred Scheiba

Werner Schafer

Markus Weimann

Stefan Stadtm&uuml;ller

Stefan Stadtmüller

Heribert Seyffert

Karlheinz R&uuml;mpler

Fritz Berke

Nina Bechthold

Ulrich Walter

Guenter Hahn

Werner Schaefer

Volker Schrenk

Werner Sch&auml;fer

The invention provides for the use of organomodified polysiloxanes of the general formula (I) in which

Use of organomodified siloxanes for surface modification of polyolefins

The invention relates to a process for preparing nondusting free-flowing pigment concentrates with removal of the water from pigment suspensions comprising polymers and dispersants in a fluidized bed drier. The resulting bead-form pigment concentrates are nondusting and readily free-flowing. The invention further embraces the use of pigment concentrates prepared in this way for coloring plastics and polymers.

Preparation of nondusting free-flowing pigment concentrates

The preparation of pigment concentrates for the coloring of resin molding compositions in which the pigment is very finely dispersed is carried out successfully using, for the preparation of the pigment concentrates, a dispersant which contains the following components:

Dispersants for pigment concentrates

Polymers, which have polyurethane and/or polyurea groups and contain finely divided fillers, are synthesized by reacting compounds, which contain at least two hydroxyl and/or amino groups, with at least difunctional isocyanates, optionally in the presence of catalysts, and mixing with suitable fillers. The compounds, containing hydroxyl and/or amino groups, and the isocyanates, are separately mixed intimately with finely divided solids so that flowable powders are obtained. The powders obtained are mixed in a stoichiometrically required amount, and the powder mixture is subjected to the action of shear forces at, if necessary, a higher temperature. The mixture of solids obtained has a shelf life of several days or weeks without reaction between the reactive compounds contained therein.

Method for the synthesis of polymers, which have polyurethane and/or

A method for the decorative coating of sheet-like materials, particularly laminated plastics and wood-derived panels is disclosed to achieve a marbled decor effect by pressing a support sheet, impregnated with a curable aminoplast resin and coateed with a thermoplastic or duroplastic synthetic resin, on the substrate to be coated at the melting or curing temperatures of the resins, in which

Method for obtaining marbleized coatings on sheet-like materials and

A method is disclsed for surface improving sheet-like substrates to impart them with a marbleized effect. A transfer sheet is pressed on the substrate at elevated temperatures. The transfer sheet is comprised of superimposed layers of synthetic resin. The resin layer closest to the backing of the transfer sheet is devoid of pigments, while the resin layer adjacent the pigment free layer comprises 2 to 40% by weight, calculated on the amount of resin, of a flake-like pigment. The pressing of the transfer sheet against the substrate is carried out with a press tool devoid of surface pattern and having a generally flat press surface.

Method for the decorative surface coating of flat substrates

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Essen, Germany

Manfred Scheiba