Studiengesellschaft Kohle Mbh

Other

Rainer Brinkmann

Werner Brijoux

Helmut Bonnemann

Helmut B&ouml;nnemann

Michael Wagener

Joachim Richter

Eckhard Dinjus

Barbara Korall

Rainer Fretzen

The present invention relates to a process for modifying the dispersing properties of organometallic-prestabilized or organometallic-pretreated nanometal colloids by reacting reactive metal-carbon bonds in the protective shell to prepare nanometal colloids having a wide range of solubilities in hydrophilic and hydrophobic media including water, to the colloids thus prepared and their use.

Method for modifying the dispersion characteristics of metal organic-prestabilized or pre-treated nanometal colloids

The invention relates to new single- or multi-metallic magnetic colloid particles (for example, Fe, Co, Ni, Fe/Co) having a size of up to 20 nm, the surface of which is protected against corrosion by precious metals, such as Pd, Ag, Pt or Au. The invention also relates to a method for producing such materials. In isolated form or in solution said materials are used among other things as sealing media against dust and gas in magnetic fluid seals (liquid O ring), for lubricating and mounting rotating shafts (magnetic levitation bearing), for the magnetooptic storage of information as well as for the magnetic marking of cells and their separation in biological samples or for the local administration of medicines.

Anticorrosive magnetic nanocolloids protected by precious metals

Process for producing tenside-stabilized colloids of mono- and bimetals

Process for the preparation of highly active doped metal supported

Disclosed is a process for preparing acicular non-sintered iron metal pigments for magnetic signal recording, having a high storage density, high saturation magnetization and remanence, the coercive field strength of which at a given crystallite size of the starting material is low and is increased as desired by subsequent annealing. The preparation of said iron metal pigments is effected by reduction of iron oxide compounds with metal hydrides of metals of the Groups I or II of the Periodic Table of Elements in organic solvents, with the metal hydrides being solvatized with a carrier in the form of a carrier complex.

Acicular iron-magnet pigments having an adjustable coercive field

Growing community of inventors

Mülheim an der Ruhr, Germany

Rainer Brinkmann