Microencapsulation of biologically active material

Details Microencapsulation of biologically active material Microencapsulation of biologically active material

1990-02-21

1992-03-31

Page, T. K.

Drug, bio-affecting and body treating compositions

Preparations characterized by special physical form

Capsules

424 78, 424 79, 424456, A61K 948, A61K 3174

Patent

active

051006731

ABSTRACT:
Polyelectrolyte membrane capsules are composed of a semi-permeable membrane and an active material enclosed by it, the membrane being formed of a biocompatible, non-toxic polyacid and a polybase; the polybase is composed of repeating monomer units of the formula (I) ##STR1## in which R.sup.1 and R.sup.2 have the indicated meanings.

REFERENCES:
patent: 3069370 (1962-12-01), Jensen et al.
patent: 3594327 (1971-07-01), Becsey
patent: 4449983 (1984-05-01), Cortese et al.
patent: 4585652 (1986-04-01), Miller
patent: 4663149 (1987-05-01), Eckenhoff et al.
patent: 4789516 (1988-12-01), Lim
patent: 4795642 (1989-01-01), Cohen et al.
Chang, Artificial Cells (1972), American Lecture Series Publication No. 828.

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