| 摘要 |
<p>Fine polymer particles and polymer-encapsulated particles are formed by dissolving a polymer in a selective solvent, either lowering the temperature of the solution and/or adding thereto, a non-solvent for the polymer precipitating the polymer from the solution. Particulate material may be included when the solution is formed so that when the polymer precipitates out of the solution, the polymer encapsulates the particulate material. Two homopolymers are placed in solution with the selective solvent so that one polymer precipitates first out of the solution and is suspended therein, the other polymer is precipitated later out of the remaining solution, encapsulating the one polymer particles, forming core/shell polymer particles. Pigments, liposomes and other particulate material can be polymer encapsulated, the polymer and polymer-encapsulated particles being uniform in size and morphology.</p> |
