Carbon black granulate, method for producing carbon black...

Details Carbon black granulate, method for producing carbon black... Carbon black granulate, method for producing carbon black...

C - Chemistry, Metallurgy

09

C

C09C 1/58 (2006.01)

Patent

CA 2743421

The invention relates to carbon black granulates having an APC value, measured at a conveying speed of 8 m/s and a solid load of 27 g/kg, less than or equal to 20 and a 25 µm pressure filter value of less than 5 bar cm2/ g. The carbon black granulate is produced by carbon black powder being pre-granulated in a first mixing granulator with addition of a granulation liquid with or without binders and being granulated to a finished state in a second mixing granulator without further addition of granulation liquid. The carbon black granulate can be used as a filler, reinforcing filler, UV stabilizer, conductive carbon black, pigment, or reducing agent.

L'invention concerne un granulat de noir de carbone avec un indice APC, mesuré pour une vitesse de transport de 8 m/s et une charge en matière solide de 27 g/kg, inférieure ou égale à 20 et une valeur de pression du filtre à 25 µm inférieure à 5 bars cm2/g. Le granulat de noir de carbone est obtenu par les opérations consistant à prégranuler de la poudre de noir de carbone dans un premier granulateur de mélange avec addition d'un liquide de granulation avec ou sans liant et à la granuler de façon finie dans un second granulateur de mélange sans autre addition de liquide de granulation. Le granulat de noir de carbone peut être utilisé comme charge, charge de renforcement, stabilisant UV, noir de carbone conducteur, pigment ou agent réducteur.

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