A dispersant or dispersing agent (also known as plasticizer or supper
 plasticizer) is mostly surface active material or sometimes it can be a
 non-surface active polymer added to a suspension typically a colloid 
for enhance separation of particles and to prevent the process of 
thickening or clumping in the suspension. Dispersing agents include 
mixture of various chemicals such acrylic acid, polycarboxylate, 
lignosulfonates, and napthalene sulfonate. ... Read more