Basf Aktiengesellschaft

Emtec Magnetics Gmbh

Volker Richter

Norbert Schneider

Peter Schuhmacher

Frank Meyer

Peter Blaschka

Wolfgang Best

Harald Keller

Frank Prechtl

Peter Heilmann

Robert Parker

G&uuml;nter Bettinger

Dieter Scheffel

Erich Beck

Karl Siemensmeyer

Sylke Haremza

Werner Lenz

Albert Kohl

Werner Balz

Helmut Steininger

Roland Falk

Volker Koch

Claudia Sierakowski

Peter Nagel

Josef Woellhaf

Hans-Gunter Wagner

Paul Willmann

Tilmann Hezel

Norbert Gilbert

The invention relates to a cholesteric layered material with improved color shift stability.

Cholesteric layered material having improved color stability, and the production thereof

The present invention relates to novel cholesteric layered materials having the layer sequence A /B/A , where A and A are identical or different and each comprise at least one cholesteric layer, and B is at least one interlayer separating the layers A and A from one another, wherein layer B is an adhesive layer; cholesteric multilayered pigments which can be produced therefrom; a process for their production, and their use.

Cholesteric layered material, and the production thereof

The invention relates to cholesteric layered material having an improved color impression, to pigments prepared therefrom, and to a process for the production and use thereof.

Cholesteric layered material having an improved color impression, and the production thereof

Multilayer cholesteric pigments

Improved cholesteric special-effect layers are obtainable by comminuting cholesteric layers. These cholesteric layers are produced by applying at least one layer of a reactive, pourable cholesteric mixture to a moving substrate, by casting, and forming a solid cholesteric layer.

Coatings with a cholesteric effect and method for the production thereof

A knife coater for the application of one or more magnetizable dispersions located one on top of the other to a moving flexible substrate by means of a plurality of coater slots which are arranged essentially horizontally and parallel to one another in a multipart block and are fed from reservoirs is described, the outlet orifices of the coater slots being essentially opposite the summit of a concave support surface for the substrate, the substrate transporting the applied layers, the outlet surfaces of the coater block which are opposite the support surface being adapted to the radius of the roll and the inflow gap being larger than the outflow gap.

Apparatus for the production of a magnetic recording medium

Apparatus for the manufacture of the magnetic coatings of magnetic disks consisting essentially of a clamp/drive unit for the base plate to be coated, a unit for applying the magnetic dispersion, and flat covering elements which rotate during centrifuging of the coated base plate in the same direction as said base plate and at a short distance from the surfaces thereof.

Apparatus for the manufacture of the magnetic coatings of magnetic disks

A disk to be coated on both sides in rotatively supported within an annular housing of a larger internal diameter. Means traverse and coat each side of the rotating disk. The inner housing wall is disposed transversely to the disk and has an annular slot operatively associated with the disk whereby excess coating material is spun off the disk and into the housing. The housing is radially of a triangular cross-section, the apex offset from said disk whereby said spun off material strikes an inclined internal wall surface of the housing. Means orbit a plurality of such disks about a central axis and through a plurality of movable treating stations.

Apparatus for coating magnetic disks

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Heidelberg, Germany

Volker Richter