Daimler Chrysler Ag

Daimler-benz Ag

Katja Strelzyk

Andreas Stohr

Fritz Dannenhauer

Michael Gailberger

Peter Strohriegl

Karl Holdik

Anne Barth

Petra Grundig

Erik Grosse

Kathrin Kuerschner

Compounds and their application as well as a method of producing liquid crystalline polymers therefrom

A compound for use as a nematic phase in cholesteric liquid polymers of the general formula C&mdash;A,, and a production process.

Compounds, process for their manufacture, as well as a process for manufacturing liquid-crystalline polymers using these compounds

The invention relates to platelet-shaped interference pigments for effect paints for painting objects of daily use, especially vehicle bodies, with the interference pigments including liquid crystal polymers (LCP) with main and/or side groups&mdash;mesogens&mdash;which are arranged at least approximately chirally-nematically or the like. In order to be able to paint different colored backgrounds in a covering fashion using the transparent interference pigments, the interference pigments are built up in several layers and also have at least one and preferably two interfering layer(s) of liquid crystal polymers and even of a single, preferably centrally located, light-absorbent layer, with the light-absorbent layer absorbing at least a portion of the visible light spectrum. Advantageously the light-absorbent layer can absorb light in the entire visible light spectrum, in other words appear black. It is also possible for it to be made light-absorbent within those partial areas of the visible light spectrum that lie outside one of the colors of the interference pigments. A method is also disclosed for manufacturing the multilayer interference pigments.

Method for producing platelet-shaped interference pigments

The invention relates to compounds with the general formula Y.sup.1 --A.sup.1 --M.sup.1 --A.sup.2 --Y.sup.2 wherein

Compounds and their application as well as a method of producing liquid

The invention relates to platelet-shaped interference pigments for effect paints for painting objects of daily use, especially vehicle bodies, with the interference pigments including liquid crystal polymers (LCP) with main and/or side groups--mesogens--which are arranged at least approximately chirally-nematically or the like. In order to be able to paint different colored backgrounds in a covering fashion using the transparent interference pigments, the interference pigments are built up in several layers and also have at least one and preferably two interfering layer(s) of liquid crystal polymers and even of a single, preferably centrally located, light-absorbent layer, with the light-absorbent layer absorbing at least a portion of the visible light spectrum. Advantageously the light-absorbent layer can absorb light in the entire visible light spectrum, in other words appear black. It is also possible for it to be made light-absorbent within those partial areas of the visible light spectrum that lie outside one of the colors of the interference pigments. A method is also disclosed for manufacturing the multilayer interference pigments.

Interference pigments for effect paint, paint manufactured therefrom,

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Ulm, Germany

Katja Strelzyk