Patent ID: 9567446
Date: 2017-02-14
CPC Classifications: C08J,C09K,C11D,H01F

Claim:
1. A method of forming a polymeric structure of cells inside micro-sized particles, comprising the steps of: a. forming a homogenous solution by heating a mixture of a high molecular weight polymer having a Mn of at least 20,000 and a low molecular weight material having a Mn of less than 20,000, wherein said low molecular weight material makes up at least about 50% by weight of the homogenous solution, b. forming a dispersed solution by dispersing the homogenous solution formed in step (a) into an inert material, wherein the homogenous solution formed in step (a) is phase separated from the inert material, c. cooling the dispersed solution formed in step (b) to cause the high molecular weight polymer to phase separate from the low molecular weight material, d. forming solid particles comprised of said low molecular weight material trapped inside a structure of cells of said high molecular weight polymer, and e. removing the solid particles formed in step (d) from the dispersed solution.