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AssigneeBASF Coatings GmbH
InventorsHubert Baumgart, Ulrike Röckrath, Astrid Poth, Günther Ott, Christin Sobbe, Uwe Meisenburg
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The invention relates to an intrinsically viscous powder-slurry that can hardened by actinic radiation or optionally by thermal means, which contains solid spherical particles with an average particle size of 0.8 to 20 μm and a maximum particle size of 30 μm. The clear powder coating slurry contains 0.05 to 1 meq/g of ion-forming groups and 0.05 to 1 meq/g of neutralizing agents and has a viscosity of (i) 50 to 1000 mPas at a shear rate of 1000 s−1, (ii) 150 to 8000 mPas at a shear rate of 10 s−1, and (iii) from 180 to 12000 mPas at a shear rate of 1 s−1.
A pseudoplastic powder slurry comprising solid spherical particles with an average size of from 0.8 to 20 μm and a maximum size of 30 μm, and having an ion-forming group content of from 0.05 to 1 meq/g, a neutralizing agent content of from 0.05 to 1 meq/g, and a viscosity of (i) from 50 to 1000 mPas at a shear rate of 1000 s−1, (ii) from 150 to 8000 mPas at a shear rate of 10 s−1, and (iii) from 180 to 12000 mPas at a shear rate of 1 s−1, wherein the pseudoplastic powder slurry is curable with actinic radiation, and, optionally, also curable thermally.
A process for preparing a pseudoplastic powder slurry curable with actinic radiation comprising:
Dependencies are inferred from the claim text.