Effect pigments with high chroma and high brilliancy, method for the production and use thereof
AssigneeEckart GmbH
InventorsMichael Grüner, Günter Kaupp, Ralph Schneider
Life of this patent
Estimating the term…
Abstract
The invention relates to an absorbent effect pigment including a nonmetallic substrate in platelet form and a coating applied thereto, wherein the coating includes at least one spacer layer. The invention further relates to a process for production of and to the use of the absorbent effect pigment.
Claims44
An absorbent effect pigment comprising a nonmetallic substrate in platelet form and a coating applied to the substrate, wherein the coating includes
- a) optionally a layer 1 comprising or consisting of at least one of tin oxide, tin hydroxide or tin oxide hydrate,
- b) a layer 2 comprising at least one of metal oxide, metal hydroxide or metal oxide hydrate,
- c) a layer 3 comprising at least one of metal oxide, metal hydroxide or metal oxide hydrate,
- at least one of layers 2 and 3 comprises at least two different metal ions and layers 2 and 3 are interrupted by a spacer layer, wherein the at least one spacer layer includes connections and cavities and wherein the at least one spacer layer has a network density of <85%.
An absorbent effect pigment comprising a nonmetallic substrate in platelet form and a coating applied to the substrate, wherein the coating comprises:
- a) optionally a layer 1 comprising or consisting of at least one of tin oxide, tin hydroxide or tin oxide hydrate,
- b) a layer 2 comprising at least one of metal oxide, metal hydroxide or metal oxide hydrate, and
- c) a layer 3 comprising at least one of metal oxide, metal hydroxide or metal oxide hydrate, at least one of layers 2 and 3 comprises at least two different metal ions and layers 2 and 3 are interrupted by a spacer layer,
- wherein the at least one spacer layer includes connections and cavities and wherein the effect pigment, within the spacer layer, has a number of connections or spacers per micrometer in a range from 0 to 11.
An absorbent effect pigment comprising a nonmetallic substrate in platelet form and a coating applied to the substrate, wherein the coating comprises:
- a) optionally a layer 1 comprising or consisting of at least one of tin oxide, tin hydroxide or tin oxide hydrate, b) a layer 2 comprising at least one of metal oxide, metal hydroxide or metal oxide hydrate, and c) a layer 3 comprising at least one of metal oxide, metal hydroxide or metal oxide hydrate, at least one of layers 2 and 3 comprises at least two different metal ions and layers 2 and 3 are interrupted by a spacer layer,
- wherein the at least one spacer layer includes connections and cavities and wherein the at least one spacer layer has a mean height ha ranging from 5 nm to 120 nm.
Dependencies are inferred from the claim text.