Invention Grant
- Patent Title: Process for the preparation of metallic nano-particle layers and their use for decorative or security elements
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Application No.: US16630146Application Date: 2018-07-25
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Publication No.: US11643561B2Publication Date: 2023-05-09
- Inventor: Nikolay A. Grigorenko , Michelle Richert
- Applicant: BASF SE
- Applicant Address: DE Ludwigshafen am Rhein
- Assignee: BASF SE
- Current Assignee: BASF SE
- Current Assignee Address: DE Ludwigshafen am Rhein
- Agency: Faegre Drinker Biddle & Reath LLP
- Priority: EP 183732 2017.07.28
- International Application: PCT/EP2018/070146 2018.07.25
- International Announcement: WO2019/020682A 2019.01.31
- Date entered country: 2020-01-10
- Main IPC: C09D11/101
- IPC: C09D11/101 ; C23C18/14 ; C09D11/033 ; C09D7/61 ; C09D7/63 ; B42D25/373 ; C09D7/40 ; B05D3/00 ; B05D5/06 ; B42D25/378

Abstract:
The present invention relates to a process for the preparation of thin silver nano-particles containing layers, which are produced directly on a substrate as part of a coating or printing process. The layers can show different colours in transmittance and reflectance. The invention further relates to decorative and security elements. When the layers are applied over a security element, such as a hologram, the obtained products may show different colours in reflection and transmission, an extremely bright optically variable image (OVD image). Depending on the thickness of the layer a more or less intensive metallic aspect appears.
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Information query
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