Stabilized perfume-containing microcapsules and method of prepar

Details Stabilized perfume-containing microcapsules and method of prepar Stabilized perfume-containing microcapsules and method of prepar

1988-12-30

1991-09-24

Lovering, Richard D.

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Particulate matter

264 41, 264 43, 512 2, 512 4, 4283215, 42840224, 424490, 424495, B01J 1308, B01J 1320, A61K 746

Patent

active

050513052

ABSTRACT:
Rupturable microcapsules made up of very small droplets or globules of perfume oil encapsulated with an inert polymeric wall are stabilized by providing ethyl cellulose in the perfume oil. This measure prevents escape of higher volatility components of the oil, which would otherwise occur during the preparation process. The stabilized microcapsules may be prepared by a liquid bath encapsulation method wherein ethyl cellulose is first dissolved in the starting oil, and the resulting solution is emulsified by mixing with a gelatin solution in water. The emulsion is then combined with a coacervant and cross-linking agent. Upon cooling the system, a gelatin-based wall coating is deposited around the emulsified particles. Fragrance characteristics of the starting perfume are preserved by this means.

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