Encapsulating substantially soluble portion of core material in substantially soluble shell material of different solubility

Abstract

Abstract ENCAPSULATION OF LIQUID, SEMISOLID, OR SOLID CORE MATERIALS IN SHELL MATERIAL BY ATOMIZING AND DRYING A SINGLE PHASE SOLUTION OF CORE AND SHELL MATERIALS. IN ONE SYSTEM MENT USING A MUTUAL SOLVENT-PREFERENTIAL SOLVENT SYSTEM OF CHLOROMERIC AND ISOPROPANOL, THE CORE MATERIAL IS THE POLYMERIC REACTION PRODUCT OF ISOPROPYLIDENEDIPHENOXYPROPANOL AND ADIPIC ACID, AND THE WALL MATERIAL IS THE REACTION PRODUCT OF A DIMER ACID WITH A LINEAR DIAMINE. IN OTHER EMBODIMENT USING A MUTUAL SOLVENT-MUTUAL NONSOLVENT SYSTEM OF CHLOROFORM AND HEPTANE, THE CORE MATERIAL IS THE POLYMERIC REACTION PRODUCT OF ISOPROPYLIDENEDIHENOXYPROPANOL AND ADIPIC ACID, AND THE WALL MATERIAL IS POLYSTYRENE. THE CORE OR SHELL, OR BOTH, MAY BE PIGMENTED OR DYED. THE CAPSULES PRODUCED HAVE NUMEROUS USES INCLUDING THEIR USE AS AN ELECTROSTATOGRAPHIC TONER.

Inventors

• 👤 R Wellman

Bibliographic Details