DISPERSANT FOR AQUEOUS SLURRY OF CARBONACEOUS FINE POWDER

摘要

PURPOSE:To provide a dispersant containing an aromatic hydrocarbon polymer having sulfonic acid group and a polymer of a polymerizable aliphatic monomer having amide group, and effective to decrease the viscosity of a concentrated aqueous slurry of carbonaceous fine powder and improve its fluidity. CONSTITUTION:The objective dispersant contains (A) (i) a polymer obtained by the polymerization of a polymerizable aromatic sulfonic acid monomer (and a polymerizable hydrocarbon monomer) as essential component and/or (ii) a polymer obtained by polymerizing polymerizable hydrocarbon monomers containing a polymerizable aromatic monomer as an essential component and sulfonating the obtained polymer, and (B) a polymer of a polymerizable aliphatic monomer containing amide group or a polymerizable monomer containing cyclic amide group. EFFECT:High dispersion stability attainable in the state left at rest for a long period.