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Microencapsulation by interfacial polycondensation
Author(s) -
Mackinney Herbert W.
Publication year - 1963
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760030115
Subject(s) - dissolution , aqueous solution , materials science , polymer , condensation polymer , chemical engineering , copolymer , drop (telecommunication) , chloride , diamine , phase (matter) , polymer chemistry , organic chemistry , composite material , chemistry , telecommunications , computer science , engineering , metallurgy
A water immiscible liquid is encapsulated in a thin skin of an insoluble copolymer by dissolving a difunctional acid chloride in said liquid and spraying the solution in fine droplets into a dilute aqueous solution of excess glycol or diamine. The polymer, which is not hygroscopic, forms as an insoluble film on the periphery of each drop. The microcapsules may be separated from the aqueous phase and dried without coalescing. Dyes, pigments, stabilizers, and other materials may be incorporated within the capsules.