Method of making microscopic capsules

Abstract

Abstract THIS PROCESS OF FORMING MINUTE CAPSULES EN MASSE WHICH COMPRISES (A) ESTABLISHING AN AGITATED SYSTEM CONSISTING OF A LIQUID VEHICLE CONSTITUTING A CONTINUOUS FIRST PHASE, A SECOND PHASE DISPERSED THEREIN CONSISITING OF MINUTE MOBILE ENTITIES OF CORE MATERIAL, AND A THIRD PHASE DISPERSED THEREIN CONSISTING OF MINUTE, MOBILE LIQUID ENTITIES OF A WALL-FORMING SOLUTIONOF A POLYMERIC MATERIAL, THE SAID CORE MATERIAL BEING WETTABLE BY SAID WALLFORMING SOLUTION,THE SAID THREE PHASES BEING MUTUALLY INCOMPATIBLE, THE THIRD PHASE CONSTITUTING SUCH A PART OF THE TOTAL THREE-PHASE SYSTEM, BY VOLUME, THAT IT CAN EXIST AS A DISPERSED PHASE OF MINUTE MOBILE ENTITIES CAPABLE OF AND SUFFICIENT IN AMOUNT TO DEPOSIT AROUND THE CORE ENTITIES, AND WHEREIN THE WALL-FORMING POLYMERIC MATERIAL HAS A DECREASING SOLUBILITY WITH INCREASING TEMPERATURE IN THE VEHICLE, (B) HARDENING THE WALLS SO FORMED BY ELEVATING THE TEMPERATURE OF THE SYSTEM TO A TEMPERATURE ABOVE THE GEL POINT OF THE WALL-FORMING POLYER, AND (C) SEPARATING THE HARDENED CAPSULES FROM THE REST OF THE SYSTEM AT A TEMPERATURE ABOVE THAT AT WHICH RESOLUTION OF THE CAPSULE WALLS TAKES PLACE TO ANY SUBSTANTIAL DEGREE.

Inventors

• 👤 Joseph Anthony Bakan

Bibliographic Details