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PROCESS FOR MAKING A COLLESTERIC LIQUID CRYSTAL POLYMER MULTI-LAYER, MULTI-LAYER POLYMER, USE OF THE MULTI-LAYER POLYMER, PIPING IN FLAKES, USE OF THE SAME, OBJECT OR PRINT INK OR COMPOSITION OF THE INKING OR PRINTING COATING
PROCESS FOR MAKING A COLLESTERIC LIQUID CRYSTAL POLYMER MULTI-LAYER, MULTI-LAYER POLYMER, USE OF THE MULTI-LAYER POLYMER, PIPING IN FLAKES, USE OF THE SAME, OBJECT OR PRINT INK OR COMPOSITION OF THE INKING OR PRINTING COATING
cholesteric multilayer. The invention provides a multi-layer cholesteric liquid crystal polymer (CLCP), wherein at least two layers of CLCP differing in at least one optical property are arranged on top of each other, characterized in that said at least two layers are chemically crosslinked. interlayered through the polymer network to form a mechanically unique solid body that can be fragmented to give a pigment without deterioration of its internal structure, and which has an abrupt pitch variation of the cholesteric liquid crystal at the interface between said at least two layers of cholesteric liquid crystal polymer. corresponding pigments, coating compositions and their use in security and decorative printing and coating applications are also presented.
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