Encapsulation by entrapment within polyhydroxy polymer borates

Details Encapsulation by entrapment within polyhydroxy polymer borates Encapsulation by entrapment within polyhydroxy polymer borates

B - Operations, Transporting

01

J

71/40, 6/63, 117

B01J 13/02 (2006.01) A01N 25/26 (2006.01) A01N 25/28 (2006.01) B01J 13/06 (2006.01)

Patent

CA 1185837

ABSTRACT OF THE DISCLOSURE: Chemical biological agents to be encapsulated are dissolved or dispersed in an aqueous paste of a gel-forming polyhydroxy polymer. Subsequent addi- tion of boric acid or a boric acid derivative at an alkaline pH converts the paste into a gel, thereby entrapping the agents in a protective matrix. En- capsulation of biologically active compositions pro- vides 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 de- composition from exposure to ultraviolet light.

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