Process for producing capsules having a permeability-controllabl

Details Process for producing capsules having a permeability-controllabl Process for producing capsules having a permeability-controllabl

1989-03-29

1992-02-18

Griffin, Ronald W.

Drug, bio-affecting and body treating compositions

Preparations characterized by special physical form

Particulate form

424494, 514777, 514779, 514781, 514963, A61K 962, A61K 3700

Patent

active

050892720

ABSTRACT:
The present invention relates to a process for producing a microcapsule comprising a permeability-controllable membrane. This process comprises adjusting the ionic strength of a solution of a soluble chitin derivative, and then bringing this solution into contact with a solution of a polyanionic polysaccharide, its salt or a mixture thereof.

REFERENCES:
patent: 3567650 (1971-03-01), Bakan
patent: 3594326 (1971-07-01), Himmel
patent: 4016098 (1977-04-01), Saeki et al.
patent: 4744933 (1988-05-01), Rha et al.
patent: 4808707 (1989-02-01), Daly et al.

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