Encapsulation by entrapment within starch adduct matrix

Details Encapsulation by entrapment within starch adduct matrix Encapsulation by entrapment within starch adduct matrix

1980-10-30

1983-05-10

Lovering, Richard D.

Chemistry: fertilizers

Processes and products

Forms or conditioning

71 6411, 71100, 71105, 71117, 71118, 71121, 71122, 71DIG1, 424 22, 424 35, 264 43, 42721332, A01N 4300, A01N 2528, A61K 926, B01J 1302

Patent

active

043828132

ABSTRACT:
Water-insoluble chemical biological agents to be encapsulated are dispersed in an aqueous paste of a starch-containing material alkoxide. Subsequent addition of selected water-soluble alkali earth metal cations insolubilize the paste, thereby entrapping the agents in a protective matrix. Encapsulation of biologically active compositions provides a shield against hostile environments, improves safety in handling, and slows the release of such compounds to the surrounding medium. Highly volatile liquids are protected against losses by evaporation. Encapsulation also provides protection against decomposition from exposure to ultraviolet light.

REFERENCES:
patent: 2588463 (1952-03-01), Balassa
patent: 3786123 (1974-01-01), Katzen
patent: 4277364 (1981-07-01), Shasha et al.
W. J. Connick, Jr., "Encapsulation of Herbicides in Alginate Gels for Aquatic Weed Control," Proceedings of 6th International Symposium on Controlled Release of Bioactive Materials, New Orleans, LA, Aug. 6-8, 1979.

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