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BASF Patents PVC Plastisols for Use in Coil Coatings

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By: KERRY PIANOFORTE

Editor, Coatings World, Coatings World

Patent No. U.S. 7,741,403 B2
 BASF Corporation has been awarded a patent for an effect pigment PVC plastisol comprised of at least one finely divided PVC homopolymer, prepared by emulsion polymerization or microemulsion polymerization, having particle sizes of from 0.04-40 μm, and which as a dispersion in a plasticizer exhibits dilatancy; at least one finely divided PVC homopolymer, prepared by emulsion polymerization, having particle sizes of from 1-400 μm, and which as a dispersion in a plasticizer exhibits pseudoplasticity; at least one plasticizer; at least one effect pigment and at least one additive, wherein the additive is comprised of an organic solvent, and the weight ratio is chosen so that the PVC plastisol exhibits pseudoplasticity.

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