Method for making capsules by interfacial polymerization

Claim 1

METHOD FOR ENCAPSULATING A LIWUID BIFUNCTIONAL REACTANT CAPABLE OF REACTING WITH A SECOND BIFUNCTIONAL REACTANT TO FORM A POLYMER WHICH METHOD COMPRISES (1) DISCHARGING DROPS OF SAID LIQUID BIFUNCTIONAL REACTANT INTO A MULTI-LAYER BATH WITH WHICH SAID LIQUID BIFUNCTIONAL REACTANT IS IMMISCIBLE, AND BATH COMPRISING SOLUTIONS OF SAID SECOND BIFUNCTIONAL REACTANT INCLUDING A FIRST LAYER HAVING A FIRST SPECIFIC GRAVITY AND A SECOND LAYER HAVING A SECOND SPECIFIC GRAVITY GREATER THAN SAID FIRST SPECIFIC GRAVITY, SAID LIQUID BIFUNCTIONAL REACTANT HAVING A SPECIFIC GRAVITY GREATER THAN SAID FIRST SPECIFIC GRAVITY AND EQUAL TO OR LESS THAN SAID SECOND SPECIFIC GRAVITY, AND (2) CAUSING SAID DROPS TO PASS THROUGH SAID FIRST LAYER AND COME TO REST IN A BOUNDARY LAYER BETWEEN SAID FIRST AND SECOND LAYERS, WHEREBY THE EXTERNAL SURFACE OF SAID DROPS IS CONVERTED TO A POLYMERIZED PROTECTIVE SHELL.