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Abstract

Sulfide derivatives of catechins derived from condensed tannins have broad spectrum biocidal characteristics. Epicatechin-4-alkylsulfides and cupric complexes thereof containing up to 20, preferably 5 to 15, carbon atoms are particularly effective biocides against wood rotting fungi and gram-positive bacteria. Such sulfides are prepared by reacting condensed tannin, either in the form of a purified tannin extract or comminuted plant tissue, with an appropriate thiol under mild acidic conditions.

Patent Number

4,906,656

Assignee

Board of Control of Michigan Technological University, Houghton, Mich.

Application Number

155,299

Date Filed

2-12-1988

Certificate of Correction

No

Issue Date

3-6-1990

Disciplines

Biomedical Engineering and Bioengineering | Engineering

Biocidal treatment of materials with catechins

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