Abstract: Effect pigments having improved optical properties based on SiO2 flakes coated with one or more layers, where the SiO2 flakes have a thickness of from 50 nm to 150 nm; processes for the preparation thereof; and use of these pigments in cosmetics, paints, coatings, plastics, films, in security printing, in security features in documents and identity cards, for coloring seed, for coloring foods or in medicament coatings and for the preparation of pigment compositions and dry preparations; are disclosed.

Abstract: The invention relates to a pigment with a metallic luster, comprising a plate-like non-metallic substrate having a thickness lower an 200 nm, which is entirely coated with a metallic layer.

Abstract: The present invention relates to multilayered interference pigments comprising a platelet-shaped substrate which is coated with alternating layers of materials of high and low refractive index, where the total thickness of the interference pigments is not greater than 1 ?m. The present invention likewise relates to processes for the preparation of these pigments, in which a substrate is coated alternately with layers of materials of high and low refractive index, where the thicknesses of the layers of materials of high and low refractive index are selected in such a way that the total thickness of the interference pigments does not become greater than 1 ?m, and to the use of these pigments in cosmetics, paints, coatings, plastics, films, in security printing, in security features in documents and identity cards, for coloring seed, for coloring foods or in medicament coatings, and for the preparation of pigment compositions and dry preparations.

Abstract: Disclosed are transparent conductive pigments of flake-form substrates coated with a conductive layer, where the number-weighted mean particle area F50 of the transparent conductive pigments is greater than or equal to 150 ?m2, and processes for the production of the pigments, and the use thereof.

Abstract: A pigment with a metallic luster, comprising a wafer-like substrate made of aluminium dioxide having a thickness of more than 250 nm and less than 1 ?m, which is fully enveloped by a metal layer.

Abstract: A pigment with a metallic lustre, comprising a wafer-like substrate made of aluminium dioxide having a thickness of more than 250 nm and less than 1 &mgr;m, which is fully enveloped by a metal layer.

Abstract: The invention relates to a pigment with a metallic lustre, comprising a plate-like non-metallic substrate having a thickness lower an 200 nm, which is entirely coated with a metallic layer.

Abstract: Multilayered systems having optical properties based on metallic substrates comprise both a layer (A) of at least two dielectric materials of different refractive index, where the refractive index at the lower side and the refractive index at the upper side of layer (A) are different, and a selectively or non-selectively absorbent layer (B).

Abstract: The present invention relates to laser-markable pigments which are distinguished by the fact that an absorber is coated with a marker and optionally with a diffusion barrier, to a process for the preparation of the laser-markable pigments, and to the use thereof.

Abstract: The invention relates to a transparent medium comprising multilayer pigments having angle-selective reflection or transmission properties and/or absorption properties, and to their use, in particular in transparent thermal insulation systems (TTIs).

Abstract: The present invention relates to laser-markable plastics of which a feature is that they comprise as dopant at least one metal powder and/or semimetal powder selected from the group consisting of aluminum, boron, titanium, magnesium, copper, tin, silicon and zinc and one or more effect pigments based on phyllosilicates.

Abstract: The invention relates to multilayered interference pigments which comprise a platelet-shaped substrate of silicon dioxide which is coated alternately with layers of light-transparent materials having refractive indices of n>1.8 and layers of light-transparent materials having refractive indices of n≦1.8, where the optical thickness of the platelet-shaped substrate and the optical thickness of the individual layers of light-transparent materials having refractive indices of n≦1.8 are the same.

Abstract: Multilayer pearl lustre pigment on the basis of a platelet-shaped substrate comprising a material of low refractive index in the range from 1.35 to 1.8, which comprises at least (i) one first layer comprising a material having a refractive index of more than 1.8, (ii) optionally, a second layer comprising a material of low refractive index in the range from 1.35 to 1.8, (iii) a semitransparent metal layer which is applied to the substrate or to the layers (i) or (ii), and (iv) if desired, an aftercoating, the substrate being platelet-shaped silicon dioxide, aluminium oxide, boron oxide or magnesium fluoride.

Abstract: The invention relates to a transparent medium comprising pearl lustre pigments having angle-selective reflection and/or transmission properties and to the use thereof, especially in transparent thermal insulation systems (TIMs).

Abstract: The present invention relates to interference pigments on the basis of multiply coated, platelet-shaped substrates which comprise at least one layer sequence comprising (A) a coating having a refractive index n≧2.0, (B) a colorless coating having a refractive index n≦1.8, and (C) a nonabsorbing coating of high refractive index, and, if desired, (D) an external protective layer.

Abstract: The invention relates to a transparent medium comprising multilayer pigments having angle-selective reflection or transmission properties and/or absorption properties, and to their use, in particular in transparent thermal insulation systems (TTIs).

Abstract: Described are chiral liquid crystalline polymer materials and polymerizable compounds used for preparing them. The polymer materials can serve as a carrier material or are coated onto a carrier material. Also described are methods of making such materials and using them to make pigment flakes used in paints, printing inks, spray paints, cosmetic products, colored plastics, optical elements and security applications.

Abstract: The invention relates to multilayered interference pigments which comprise a platelet-shaped substrate of silicon dioxide which is coated alternately with layers of light-transparent materials having refractive indices of n>1.8 and layers of light-transparent materials having refractive indices of n≦1.8, where the optical thickness of the platelet-shaped substrate and the optical thickness of the individual layers of light-transparent materials having refractive indices of n≦1.8 are the same.

Abstract: The present invention relates to pigment mixtures comprising at least two components, component A being multilayer pigments based on mica, SiO2 flakes, glass flakes, Al2O3 flakes or polymer flakes and component B being platelet-shaped, acicular or spherical colorants and/or fillers, and to the use thereof expecially in varnishes, paints, printing inks, powder coatings, plastics, ceramic glazes, polymer films and cosmetic formulations.

Abstract: An optical multilayered system comprises metal layers and a plurality of layers, where these layers comprise at least one layer pack (A) comprising a colorless dielectric layer of a material having a refractive index n of ≦1.8 and a colorless dielectric layer of a material having a refractive index n of >1.8, and a selectively or non-selectively absorbent layer (B).