Process for the production of microcapsules containing an oily liquid

Abstract

Abstract A PROCESS FOR PRODUCING MICROCAPSULES CONTAINING AN OILY LIQUID WHICH COMPRISES DISSOLVING AT LEAST ONE FILMFORMING MATERIAL WHICH FORMS AN OIL AND WATER INSOLUBLE HIGH MOLECULAR WEIGHT MATERIAL BY REACTING WITH ITSELF OR WITH ANOTHER FILM-FORMING MATERIAL IN AN OILY LIQUID IN THEPRESENCE OF A LOW BOILING SOLVENT OR A POLAR SOLVENT HAVING MISCIBILITY WITH A POLAR LIQUID FORMING THE CONTINUOUS PHASE OF THE SYSTEM, DISPRSING BY EMULSIFICATION THE RESULTING SOLUTION IN SAID POLAR LIQUID FORMING THE CONTINUOUS PHASE, AND INCREASING THE TEMPERATURE OF THE SYSTEM, WHEREBY SAID FILM-FORMING MATERIALS IN THE DISPERSION ARE TRANSFERRED TO THE SURFACES OF THE OIL ROPS AND SAID REACTION OCCURS TO THEREBY FORM THE HIGH MOLECULAR WEIGHT MATERIAL AT THE SURFACES OF THE OIL DROPS TO FORM MICROCAPSULE WALLS. THE FILM-FORMING MATERIAL IS SELECTED FROM THE GROUP CONSISTING OF POLYISOCYANATES, POLYISOTHIOCYANATES, POLYAMINES, POLYCARBOXYLIC ACIDS, POLYBASIC CHLORIDES, ACID ANHYDRIDES, EPOXY COMPOUNDS, POLYOLS, ACRYLATE COMPOUNDS, POLYSULFIDES, LACTONES, LACTAMS AND PREPOLYMERS THEREOF.

Inventors

• 👤 H Matsukawa
• 👤 M Kiritani

Bibliographic Details