Porose, pulverformige polymerteilchen
AssigneeAkzo N.V.
InventorWolfgang Lange
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Abstract
The invention relates to a process producing porous powdery polymer particles. A homogeneous mixture having two components minimum, one a meltable polymer, the other fluid inert to the polymer, both forming a system having a range of complete miscibility and a miscibility gap are introduced to a bed of solid-substance particles, then cooling the mixture to below solidification of the polymer and comminuting the obtained cake-like mass. The polymer is separated then from the inert fluid and solid-like substance particles.
Claims14
Process for the production of powdery, porous polymer particles, characterized by the introduction into a bed of solid-substance particles at a temperature above the segregating temperature, of a homogenous mixture having a minimum of two components, one component therein being a meltable polymer and the other component a fluid inert to the polymer, both components forming a binary system which has in its liquid phase a range of complete miscibility and also a range with a miscibility gap, by subsequent cooling said mixture to a temperature below the solidification temperature of the polymer in the mixture, by comminution of the cake-like mass as obtained and by separation of the polymer substance from the inert fluid and solid-substance particles.
Dependencies are inferred from the claim text.