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US 2023/0265299 A1Published application
Radar-enabled coating containing metal effect pigments on a substrate
AssigneeMerck Patent GmbH
InventorsGianfranco PIRONTI, Christoph LANDMANN
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Abstract
The present invention relates to a radar-compatible coating comprising metal-effect pigments on a substrate, to a process for the production of such a coating, and to the use of a substrate coated in this manner, in particular in vehicle construction.
Claims18
Radar-compatible coating comprising metal-effect pigments on a substrate, characterised in that the coating has at least one layer package consisting of:
- a layer (A) which comprises at least one pigment having absorbent properties and is free from metal-effect pigments, and
- a layer (B) which comprises flake-form effect pigments, where the flake-form effect pigments are exclusively metal-effect pigments, and where layer (B) has a layer thickness in the range from 2 to ≤10 μm.
Process for the production of a radar-compatible coating comprising metal-effect pigments on a substrate, characterised in that
- a layer (A) which comprises at least one pigment having absorbent properties and is free from metal-effect pigments is applied to an optionally pre-coated substrate comprising a plastic plate or plastic film, and subsequently
- a layer (B) which comprises flake-form effect pigments, where the flake-form effect pigments are exclusively metal-effect pigments, and where layer (B) has a dry layer thickness in the range from 2 to ≤10 μm, is applied to layer (A),
- or
- a layer (B) which comprises flake-form effect pigments, where the flake-form effect pigments are exclusively metal-effect pigments, and where layer (B) has a dry layer thickness in the range from 2 to ≤10 μm, is applied to an optionally pre-coated substrate comprising a plastic plate or plastic film, and subsequently
- a layer (A) which comprises at least one pigment having absorbent properties and is free from metal-effect pigments is applied to layer (B).
2 more elements
Dependencies are inferred from the claim text.