Thermochromic effect pigment and process for producing the same

PCT No. PCT/EP92/02799 Sec. 371 Date Jun. 7, 1994 Sec. 102(e) Date Jun. 7, 1994 PCT Filed Dec. 3, 1992 PCT Pub. No. WO93/12195 PCT Pub. Date Jun. 24, 1993A thermochromic effect pigment comprising a thermochromic liquid crystal material encapsulated with a polymer and coated with one or more inorgani...

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Hauptverfasser: HERBSKI, MAGARETE, SAGE, IAN CHARLES, OSTERRIED, KARL
Format: Patent
Sprache:eng
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Zusammenfassung:PCT No. PCT/EP92/02799 Sec. 371 Date Jun. 7, 1994 Sec. 102(e) Date Jun. 7, 1994 PCT Filed Dec. 3, 1992 PCT Pub. No. WO93/12195 PCT Pub. Date Jun. 24, 1993A thermochromic effect pigment comprising a thermochromic liquid crystal material encapsulated with a polymer and coated with one or more inorganic metal oxides or nearly insoluble metal salts selected from Al2O3, SnO2, ZrO2, TiO2, CaO, SiO2, ZnO, MgO or BaSO4. The pigment is stable in solvent-based formulations and can be used as a colorant in the form of an aqueous suspension or as a powder in lacquer compositions, plastic compositions, dyed filter compositions, dyed glass compositions, dyed cosmetic compositions, printing ink compositions, and in hair coloring agents.