Compositions – Preservative agents – Anti-corrosion
Patent
1980-05-16
1982-08-17
Lovering, Richard D.
Compositions
Preservative agents
Anti-corrosion
71 3, 71 66, 71100, 71117, 71 6411, 424 19, 424 22, 424 35, 424213, 424214, 424354, B01J 1302, A01N 2526
Patent
active
043448577
ABSTRACT:
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.
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Iwasaki et al: "The Decomposition of Xanthate in Acid Solution", J. Am. Chem. Soc. 80: 285-288 (1958).
Kirk-Othmer, Encyclopedia of Chemical Technology, 2nd Ed., vol. 17, pp. 178-180 (1963).
S. Ramachandra Rao, Xanthates and Related Compounds, Marcel Dekker, Inc., N.Y., pp. 63-77 (1971).
Doane William M.
Russell, deceased Charles R.
Shasha Baruch S.
Lovering Richard D.
McConnell David G.
Ribando Curtis P.
Silverstein M. Howard
The United States of America as represented by the Secretary of
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