Aqueous biocidal cationic dispersions of polymers and their use as fungicidal, bactericidal and algicidal treatment agents

US5049383A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Hans-Ullrich Huth · Egelsbach, DE
• Helmut Braun · Hofheim, DE
• Franz Konig · Frankfurt am Main, DE

Key dates

• Filing date: Dec 29, 1989
• Grant date: Sep 17, 1991
• Expiry date: Dec 29, 2009

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L33/04
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Use of fine-particled biocidal aqueous cationic dispersions of polymers as biocidal treatment agents for substrates at risk from microbes, preferably for fungicidal, bactericidal and/or algicidal treatments. The dispersions of polymers used are biocidal cationic dispersions of polymers which can be obtained from suitable monomers by emulsion polymerization and which contain biocidal cationically surfactant quaternary organic ammonium compounds, preferably tetra-substituted ammonium compounds of the formula (I) and/or alkyl- or alkenylpyridinium compounds of the formula (II), in particular in an amount of 0.1 to 20% by weight, based on the disperse polymer. The average particle diameter of the polymer particles in the biocidal cationic dispersions of polymers is preferably 0.02 to 0.5 .mu.m at a cationic activity of 1.5 to 600 .mu.mol per g of solid, measured at pH 7, and the solids content of the dispersions is preferably 3 to 40% by weight. The biocidal cationic dispersions are preferably used as treatment agents for the preservation of wood, for emulsion paint films and for polymer plasters or synthetic resin plasters, it being possible for the biocidal treatments which can be ac…