Method of making positively charged microcapsules of emulsions o

Details Method of making positively charged microcapsules of emulsions o Method of making positively charged microcapsules of emulsions o

1995-12-26

1998-05-19

Spear, James M.

Drug, bio-affecting and body treating compositions

Preparations characterized by special physical form

Capsules

4241951, 424455, 424457, 424489, 424 59, 514938, 514963, 514975, A61K 742, A61K 950, A61K 952, A61K 3578

Patent

active

057532648

ABSTRACT:
The invention relates to a process for preparing a chitosan-containing microcapsules and emulsions of an oil including the steps of (a) forming an oil-in-water emulsion by homogenizing said oil into an aqueous solution containing an anionic emulsifier; and (b) adding to the emulsion obtained in (a) an aqueous chitosan solution while continuously homogenizing the mixture to give a stable emulsion, which is converted into microcapsules by using the proper electrolyte and pH changes. Also encompassed are preparations including as active ingredient a lice repelling agent, vitamin E or a UV radiation photoprotectant. The preparations may be sustained-release or long acting preparations.

REFERENCES:
patent: 4923977 (1990-05-01), Lang et al.

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