SETT ATT FRAMSTELLA VESIKULER POLYMER

摘要

A process of preparing vesiculated polymer by converting to solid polymer a liquid medium in which is dispersed particles of a second polymer swollen by a liquid swellant, the swellant then being removed to provide vesicles in the solid polymer. Granular vesiculated polymer may be prepared by carrying out the process on a liquid medium which is itself pre-dispersed in a suspending liquid in which it is insoluble.