| abstract |
Method of making a polymer in solid particulate form by finely distributing a solution of the polymer, in a volatile polar solvent therefor, in a non-polar organic liquid suspending medium substantially immiscible with said polar solvent and not a solvent for said polymer, and then removing the volatile solvent while inhibiting aggregation of the resultant polymer solids by the presence of a surface-active agent, preferably a block copolymer or graft copolymer having a polar and a non-polar portion. |