Process for the manufacture of dustless, readily dispersible...

Details Process for the manufacture of dustless, readily dispersible... Process for the manufacture of dustless, readily dispersible...

C - Chemistry, Metallurgy

08

J

6/217, 400/7004

C08J 3/20 (2006.01) C08J 3/12 (2006.01) C09B 67/00 (2006.01) C09B 67/20 (2006.01)

Patent

CA 1069637

Abstract of the Disclosure A process for the manufacture of an easily isola- table, dustless, readily dispersible pigment granulate which comprises subjecting a suspension of a finely dispersed or- ganic pigment or pigment preparation, in the presence of water-insoluble granulating assistants belonging to the class of natural, synthetic or semi-synthetic resins, esters of dicarboxylic acids, of arylcarboxylic acids, of arylsul- phonic acids, of phosphoric and phosphorous acid, phenyl- sulphonamides or the alkaline salts of fatty acids con- taining 12 to 14 carbon atoms, but in the absence of wet- ting agents, in a two-phase system consisting of an aqueous phase and a second liquid phase which consists substantially of an organic solvent that is virtually insoluble in water and in which the granulating assistant is at least partially soluble, to a turbulent mixing until a granulate has formed, then isolating said granulate, which consists substantally of pigment or pigment preparation, granulating assistant and organic solvent, and removing the solvent therefrom.

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