True spherical polymer particles and method for their production.

摘要

True spherical fine particles of a water soluble polymer or a crosslinked product thereof, and a method for their production are disclosed. The method comprises spray drying an aqueous solution of a mixture of a water-soluble polymer and an additive such as a polyhydric alcohol or an oligosaccharide. The removal of the additive may be effected by crosslinking or washing the particles. <IMAGE>