α-alumina flakes
AssigneeMerck Patent GmbH
InventorsRyuta Suzuki, Gerhard Pfaff, Sabine Schoen, Noriyuki Matsuda, Katsuhisa Nitta
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Abstract
Alpha-Alumina flakes having a particle thickness of 130-400 nm, a D50-value of 15-30 μm, a D90-value of 30-45 μm and a D10-value of <9.5 μm. Use of the alumina flakes in varnishes, paints, automotive coatings printing inks, masterbatches, plastics and cosmetic formulations. Also, use of the alumina flakes as a substrate for effect pigments and in organic dyes.
Claims22
Al2O3 flakes having a particle thickness of 130-400 nm, a D50-value of 15-30 μm, a D90-value of 30-45 μm, a D10-value of <9.5 μm and wherein the flakes are α-alumina flakes.
Al2O3 flakes having a particle thickness of 130-400 nm, a D50-value of 15-30 μm, a D90-value of 30-45 μm, a D10-value of <9.5 μm, which are doped with TiO2, ZrO2, SiO2, SnO2, In2O3, or ZnO or a combination thereof and wherein the flakes are α-alumina flakes.
An assortment of Al2O3 flakes having a particle thickness of 130-400 nm, a D50-value of 15-30 μm, a D90-value of 30-45 μm and a D10-value of 8.8 to <9.5 μm and wherein the Al2O3 flakes are α-alumina flakes.
Dependencies are inferred from the claim text.