Laser-markable polymers and coatings
AssigneeMerck Patent GmbH
InventorsHelge Bettina KNIESS, Ulrich QUITTMANN, Silvia ROSENBERGER
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Abstract
The present invention relates to laser-markable polymers and coatings which are distinguished by the fact that they comprise tin/antimony oxide-coated spherical TiO2 particles of defined particle size as laser additive.
Claims11
Laser-markable polymers and polymeric coatings, characterised in that they comprise a polymer and spherical TiO2 particles as laser additive, where the TiO2 particles are coated on the surface with an antimony-doped tin dioxide layer (Sn,Sb)O2 and the TiO2 particles have a number-weighted particle size of <15 μm, measured at the D95 by means of laser diffraction.
Spherical TiO2 particles coated with an antimony-doped tin dioxide layer (Sn,Sb)O2, characterised in that the TiO2 particles are coated on the surface with an antimony-doped tin dioxide layer (Sn,Sb)O2 and the TiO2 particles have a number-weighted particle size of <15 μm, measured at the D95 by means of laser diffraction, and the content of antimony in the tin dioxide layer is 2-15 mol %, based on the tin dioxide.
Dependencies are inferred from the claim text.