AQUEOUS FUNGICIDAL COMPOSITION AND USE THEREOF FOR COMBATING HARMFUL MICROORGANISMS
First Claim
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1. A process for the protection of cellulose-comprising materials from infection by microorganisms comprising the treatment of the cellulose-comprising material with an aqueous active substance composition,said composition comprising (a) at least one fungicidal organic active substance with a solubility in water of less than 1 g/l at 25°
- C./1013 mbar, and (b) a finely-divided polymer with an average particle size, determined by dynamic light scattering, of 10 to 250 nm, in which the polymer particles comprise the active substance, the polymer having a glass transition temperature of at least 10°
C. and being formed from ethylenically unsaturated monomers M consisting of;
from 70 to 99.5% by weight, based on the total amount of the monomers M, of at least one neutral monoethylenically unsaturated monomer M1 with a solubility in water of not more than 30 g/l at 25°
C., which is selected from styrene and esters of monoethylenically unsaturated mono- or dicarboxylic acids with C1-C10-alkanols or C5-C8-cycloalkanols, andfrom 0.50 to 30% by weight, based on the total amount of the monomers M, of at least one ethylenically unsaturated monomers M2, which is selected from;
monoethylenically unsaturated monomers M2a exhibiting at least one acid group or at least one anionic group, the amount of monomers M2a being not more than 20% by weight, based on the total amount of the monomers M;
monoethylenically unsaturated neutral monomers M2b exhibiting a solubility in water of at least 50 g/l at 25°
C., the amount of monomers M2b being not more than 10% by weight, based on the total amount of the monomers M andnot more than 2% by weight, based on the total amount of the monomers M, of monomers having two or more nonconjugated ethylenically unsaturated double bonds,wherein the aqueous active substance composition is obtained by a process comprising radical aqueous emulsion polymerization of an oil-in-water emulsion of the monomers M, the monomer droplets of the oil-in-water emulsion to be polymerized comprising the fungicidal active substance in dissolved form.
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Abstract
The invention relates to aqueous fungicidal active substance compositions and to their use in the control of harmful microorganisms and in particular in the protection of cellulose-comprising materials, particularly wood, from infection by microorganisms, in particular those harmful fungi which can damage wood or cellulose.
The active substance composition according to the invention comprises:
- a) at least one fungicidal organic active substance with a solubility in water of not more than 5 g/l at 25° C./1013 mbar, and
- b) a finely-divided polymer with an average particle size, determined by dynamic light scattering, of not more than 300 nm, in which the polymer particles comprise the active substance, the polymer being formed from ethylenically unsaturated monomers M comprising:
- at least 60% by weight, based on the total amount of the monomers M, of at least one neutral monoethylenically unsaturated monomer M1 with a solubility in water of not more than 30 g/l at 25° C., and
- up to 40% by weight, based on the total amount of the monomers M, of one or more ethylenically unsaturated monomers M2 other than the monomers M1.
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11 Claims
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1. A process for the protection of cellulose-comprising materials from infection by microorganisms comprising the treatment of the cellulose-comprising material with an aqueous active substance composition,
said composition comprising (a) at least one fungicidal organic active substance with a solubility in water of less than 1 g/l at 25° - C./1013 mbar, and (b) a finely-divided polymer with an average particle size, determined by dynamic light scattering, of 10 to 250 nm, in which the polymer particles comprise the active substance, the polymer having a glass transition temperature of at least 10°
C. and being formed from ethylenically unsaturated monomers M consisting of;from 70 to 99.5% by weight, based on the total amount of the monomers M, of at least one neutral monoethylenically unsaturated monomer M1 with a solubility in water of not more than 30 g/l at 25°
C., which is selected from styrene and esters of monoethylenically unsaturated mono- or dicarboxylic acids with C1-C10-alkanols or C5-C8-cycloalkanols, andfrom 0.50 to 30% by weight, based on the total amount of the monomers M, of at least one ethylenically unsaturated monomers M2, which is selected from; monoethylenically unsaturated monomers M2a exhibiting at least one acid group or at least one anionic group, the amount of monomers M2a being not more than 20% by weight, based on the total amount of the monomers M; monoethylenically unsaturated neutral monomers M2b exhibiting a solubility in water of at least 50 g/l at 25°
C., the amount of monomers M2b being not more than 10% by weight, based on the total amount of the monomers M andnot more than 2% by weight, based on the total amount of the monomers M, of monomers having two or more nonconjugated ethylenically unsaturated double bonds, wherein the aqueous active substance composition is obtained by a process comprising radical aqueous emulsion polymerization of an oil-in-water emulsion of the monomers M, the monomer droplets of the oil-in-water emulsion to be polymerized comprising the fungicidal active substance in dissolved form. - View Dependent Claims (2, 3, 5, 6, 7, 8, 9, 10, 11)
- C./1013 mbar, and (b) a finely-divided polymer with an average particle size, determined by dynamic light scattering, of 10 to 250 nm, in which the polymer particles comprise the active substance, the polymer having a glass transition temperature of at least 10°
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4. The process according to claim wherein the polymer exhibits a glass transition temperature TG of at least 30°
- C.
Specification