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US 6,291,551 B1Granted
Laser-markable plastics
AssigneeMerck Patent GmbH
InventorsHelge Kniess, Dieter Heinz, Reiner Delp, Gerhard Pfaff, Matthias Kuntz
Life of this patent
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Abstract
The present invention relates to laser-markable plastics of which a feature is that they comprise as dopant anthracene- or pentaerythritol-coated effect pigments or a mixture comprising one or more effect pigments and anthracene and/or pentaerythritol.
Claims10
A laser-markable plastic, comprising a thermoplastic and a dopant, which dopant is
- an anthracene- and/or pentaerythritol-coated effect pigment
- or
- a mixture comprising at least one effect pigment and anthracene and/or pentaerythritol.
Dependencies are inferred from the claim text.