Pvd metal effect pigment powder
AssigneeSchlenk Metallic Pigments GmbH
InventorsChristian LANG, Nina LANG, Fabian PIECH, Frank J. MAILE, Thomas MÜLLER
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Abstract
The invention relates to powder made of coated PVD metal effect pigment, highly concentrated suspensions of coated PVD metal effect pigment as well as the use thereof in powder lacquers and masterbatches. The powder according to the invention made of coated PVD metal effect pigments is characterized by a very good redispersibility and is outstandingly suitable in particular for the preparation of highly concentrated suspensions. Furthermore, it is very free flowing, substantially agglomerate-free and results in coatings with excellent metallic gloss.
Claims17
1-20. (canceled)
A powder made of a coated PVD metal effect pigment, wherein the coated PVD metal effect pigment comprises a PVD metal effect pigment and a metal oxide layer, wherein the metal oxide layer amounts to 5 to 45 wt.-%, based on the total weight of the coated PVD metal effect pigment.
A suspension comprising a coated PVD metal effect pigment suspended in a solvent, wherein the coated PVD metal effect pigment comprises a PVD metal effect pigment and a metal oxide layer, wherein the metal oxide layer amounts to 5 to 45 wt.-%, based on the total weight of the coated PVD metal effect pigment, characterized in that the suspension comprises 70 wt.-% or more of the coated PVD metal effect pigment.
A masterbatch comprising solid granules formed from a composition comprising:
- a PVD metal effect pigment, a coating of a metal oxide layer provided to the PVD metal effect pigment, wherein the metal oxide layer amounts to 5 to 45 wt.-%, based on a total weight of the coated PVD metal effect pigment, and a plastic.
A process for producing a PVD metal effect pigment powder, comprising the steps of:
- a) coating metal effect pigments produced by PVD processes with metal oxide in a sol-gel process, wherein the metal oxide layer amounts to 5 to 45 wt.-%, based on the total weight of the coated PVD metal effect pigments,
- b) solid-liquid separation of the coated metal effect pigments from the reaction mixture,
- c) drying the coated metal effect pigments obtained at 100° C. to 140° C., wherein a powder is obtained.
Dependencies are inferred from the claim text.