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Patents

Clariant patents Pigment

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By: KERRY PIANOFORTE

Editor, Coatings World, Coatings World

Patent No. U.S. 7,147,703 B2
Clariant has obtained a patent for a process for aftertreating an organic pigment comprised of the steps of providing a mixture of an unground or ground organic crude pigment in a carrier and heating the mixture by microwave irradiation to achieve a mass temperature of the mixture, wherein the mass temperature of the mixture reaches 30 to 250°C, and wherein the carrier is water, an organic solvent or a mixture thereof, wherein the process results in a pigment having a defined morphology and crystal phase

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