초록 ▼

Chemical biological agents to be encapsulated are dissolved or dispersed in an aqueous solution of polyhydroxy polymer xanthate. Simultaneous addition of a strong acid and a coupling agent to the solution insolubilizes the polyhydroxy polymer without degrading the xanthate moiety, thereby entrapping

Chemical biological agents to be encapsulated are dissolved or dispersed in an aqueous solution of polyhydroxy polymer xanthate. Simultaneous addition of a strong acid and a coupling agent to the solution insolubilizes the polyhydroxy polymer without degrading the xanthate moiety, 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.

대표청구항 ▼

A method of encapsulating a chemical biological agent comprising the steps of: a. preparing a dispersion or solution of a suitable chemical biological agent in a matrix-forming material comprising an aqueous solution of a polyhydroxy polymer xanthate (PPX) having a xanthate degree of substitution (D

A method of encapsulating a chemical biological agent comprising the steps of: a. preparing a dispersion or solution of a suitable chemical biological agent in a matrix-forming material comprising an aqueous solution of a polyhydroxy polymer xanthate (PPX) having a xanthate degree of substitution (D.S.) of from about 0.1 to 3, wherein said solution has a concentration of PPX of from about 5-70%, and wherein the relative amount of said PPX with respect to said biological agent is sufficient to entrap said agent within a matrix of said PPX; b. simultaneously adding to said dispersion a strong acid and a coupling agent selected from the group consisting of hydrogen peroxide, ferric sulfate, and ferric chloride, whereby the dispersion is adjusted to a pH of from about 2 to about 7 and whereby said PPX and said coupling agent react from a single phase to form an insolubilized matrix, thereby entrapping said agent; and c. recovering said entrapped chemical biological agent.