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

• US 5,049,383 A
• Filed: 12/29/1989
• Issued: 09/17/1991
• Est. Priority Date: 04/07/1987
• Status: Expired due to Fees

• Current Assignee: Hoechst Aktiengesellschaft (Sanofi )
• Original Assignee: Hoechst Aktiengesellschaft (Sanofi )
• Inventors: Huth, Hans-Ullrich, Konig, Franz, Braun, Helmut
• Primary Examiner(s): Page, Thurman K.
• Assistant Examiner(s): AZPURU, CARLOS A
• Application Number:
  US07/458,966
• Time in Patent Office: 627 Days
• Field of Search: 424/78, 424/405, 514/642, 514/643, 514/937, 260/501.13, 427/393, 427/393.6
• US Class Current: 424/405
• CPC Class Codes: A01N 25/04 Dispersions, emulsions, suspoemulsions, suspension concentrates or gels foams A01N25/16
• CPC Class Codes: A01N 25/10 Macromolecular compounds
• CPC Class Codes: A01N 33/12 Quaternary ammonium compounds
• CPC Class Codes: A01N 43/40 six-membered rings
• CPC Class Codes: B27K 3/005 employing compositions comprising microparticles
• CPC Class Codes: B27K 3/15 Impregnating involving polymerisation including use of polymer-containing impregnating agents macromolecular compounds derived from lignocellulosic materials C08H; compositions of lignin-containing materials C08L97/02
• CPC Class Codes: C08K 5/16 Nitrogen-containing compounds C08K5/0091 takes precedence
• CPC Class Codes: C08K 5/23 Azo-compounds
• CPC Class Codes: C08L 1/28 Alkyl ethers
• CPC Class Codes: C08L 33/04 Homopolymers or copolymers of esters C08L43/04 takes precedence
• CPC Class Codes: C08L 33/062 Copolymers with monomers not covered by C08L33/06
• CPC Class Codes: C08L 97/02 Lignocellulosic material, e.g. wood, straw or bagasse manufacture of articles made from lignocellulosic material by dry processes B27N
• CPC Class Codes: C09D 131/04 Homopolymers or copolymers of vinyl acetate
• CPC Class Codes: C09D 133/066 containing -OH groups
• CPC Class Codes: C09D 5/025 Preservatives, e.g. antimicrobial agents
• CPC Class Codes: C09D 5/14 Paints containing biocides, e.g. fungicides, insecticides or pesticides C09D5/16 takes precedence

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 μm at a cationic activity of 1.5 to 600 μmol 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 achieved to display surprising long-term biological actions.

Claims

1. An antimicrobial composition comprising an antimicrobically effective amount of a fine particle dispersion containing a biocidally, cationcally active surfactant quaternary ammonium compound in an aqueous media, wherein the dispersion of a cationic polymer contains biocidal cationically surfactant quaternary organic ammonium compounds of the formula I and/or II ##STR2## in which R₁ =(C₈ -C₁₈)-alkyl or -alkenyl,

R₂ =(C₈ -C₁₈)-alkyl or -alkenyl, aryl or (C₇ -C₁₈)-aralkyl, in which the aromatic rings are unsubstituted or substituted with at least one member of the group consisting of chlorine and bromine

R₃ =(C₁ -C₄)-alkyl or the radical --(CH₂ --CHR⁴ O)_n --R⁵, in which n denotes a number from 1 to 20 and R⁴ and R⁵, which can be identical or different, denote H and/or (C₁ -C₄)-alkyl, and

A=an anion of an organic or inorganic acid.

2. A composition of claim 1 wherein R₃ is methyl.

3. A composition as claimed in claim 1, wherein the biocidal cationic dispersion of a polymer contains 0.1 to 20% by weight, based on the disperse polymer, of at least biocidal cationically surfactant quaternary organic ammonium compounds.

4. A composition as claimed in claim 1, wherein the average particle diameter of the disperse polymer in the dispersion is 0.02 to 0.5 μ

m.

5. A composition as claimed in claim 1, wherein the solids content of the biocidal cationic dispersion of a polymer is 3 to 40% by weight, based on the dispersion.

6. A composition as claimed in claim 1, wherein the biocidal cationic dispersion of a polymer has a cationic activity of 1.5 to 600 μ

mol/g of solid, measured at pH 7.

7. A composition as claimed in claim 1, wherein 5 to 95% of the total cationic activity accounts for a biocidal cationically surfactant quaternary organic ammonium compound.

8. A composition as claimed in claim 1 wherein the biocidal cationic dispersion of a polymer contains disperse polymers, the macromolecules of which contain copolymerized monomer units (calculated in % by weight, based on the polymer) of the following groups of monomers:

a) 80-99% by weight of ethylenically unsaturated monomers from the group comprising vinyl esters, (meth)acrylic esters, vinylaromatics, vinyl chloride, ethylene, (meth)acrylonitrile and diesters of maleic acid and/or fumaric acid, and

b) 1-20% by weight of ethylenically unsaturated hydrophilic monomers with one or more functional groups.

9. A composition of claim 8 wherein the functional groups of the b) component are selected from the group consisting of --OH, --COOH and ##STR3## R₁ and R₂ are individually hydrogen or --CH₂ OR and R is hydrogen or alkyl of 1 to 8 carbon atoms.

10. A process for biocidal treatment of a substrate susceptible to attack from microbes from microbes wherein the substrate is treated fungicidally, bactericidally and/or algicidally with a composition of claim 1.