摘要:
Described herein are impregnated products comprising: a cellulosic substrate having internal voids; and a reaction product of a composition comprising: water; a hygroscopic polymer; and a solid component; wherein the cellulosic substrate is impregnated with said composition. Methods of making and using the products are also described.
摘要:
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.
摘要:
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.
摘要:
A method for preserving wood by contacting wood with a composition comprising an aqueous polymer dispersion, at least one surfactant, and a wood preservative.
摘要:
The present invention provides wood preservative compositions comprising micronized particles. In one embodiment, the composition comprises dispersions of micronized metal or metal compounds. In another embodiment, the wood preservative composition comprises an inorganic component comprising a metal or metal compound and organic biocide. When the composition comprises an inorganic component and an organic biocide, the inorganic component or the organic biocide or both are present as micronized particles. When compositions of the present invention are used for preservation of wood, there is minimal leaching of the metal and biocide from the wood.
摘要:
The present invention relates to a process for preparing aqueous active compound compositions of active compounds which are poorly soluble in water, in particular of active compounds for the protection of crops and materials. Moreover, the invention relates to the active compound compositions obtainable by the process and to their use for controlling harmful organisms in plants and in the protection of materials.The process comprises the following steps: a) provision of an aqueous suspension of solid active compound particles of at least one active compound having a solubility in water of not more than 5 g/l at 25° C./1013 mbar, comprising, for stabilizing the active compound particles, at least one surfactant, where the active compound particles in the suspension have a mean particle size, determined by dynamic light scattering, of not more than 1200 nm, b) emulsion polymerization of a first monomer composition M1 in the aqueous suspension of the active compound, where the monomer composition M1 comprises at least 95% by weight, based on its total weight, of at least one neutral, monoethylenically unsaturated monomer M1.1 having a solubility in water of not more than 30 g/l at 25° C./1013 mbar, giving an aqueous dispersion of polymer/active compound particles, and c) emulsion polymerization of a second monomer composition M2 in an aqueous dispersion of the polymer/active compound particles obtained in step b), where the monomer composition M2 comprises at least 60% by weight, based on its total weight, of at least one neutral, monoethylenically unsaturated monomer M2.1 having a solubility in water of not more than 30 g/l at 25° C./1013 mbar.
摘要:
A method for preserving wood by contacting wood with an aqueous composition comprising a paraffin wax, at least one nonionic surfactant, and at least one organic wood preservative.
摘要:
A synergistic aqueous wood preservative composition comprising a copper compound and penflufen. The copper compounds of the compositions of the invention may be soluble, partially solubilized or micronized particles. The penflufen of the compositions of the invention may be solubilized, emulsified or particulate. The wood preservative compositions of the present invention are surprisingly provided as stable dispersions and confer surprising and unexpected resistance to treated wood and wood products.
摘要:
Metal nanoparticles were incorporated into wood. Ionic liquids were used to expand the wood cell wall structure for nanoparticle incorporation into the cell wall structure. Nanoparticles of elemental gold or silver were found to be effective surface enhanced Raman spectroscopy (SERS) imaging contrast or sensing agents. Nanoparticles of elemental iron were found to be efficient microwave absorbers and caused localized heating for disrupting the integrity of the lignocellulosic matrix. Controls suggest that the localized heating around the iron nanoparticles reduces losses of cellulose in the form of water, volatiles and CO2. The ionic liquid is needed during the incorporation process at room temperature. The use of small amounts of ionic liquid combined with the absence of an ionic liquid purification step and a lower energy and water use are expected to reduce costs in an up-scaled pretreatment process.
摘要:
A wood preservative includes injectable particles comprising one or more sparingly soluble copper salts. The copper-based particles are sufficiently insoluble so as to not be easily removed by leaching but are sufficiently soluble to exhibit toxicity to primary organisms primarily responsible for the decay of the wood. Exemplary particles contain for example copper hydroxide, basic copper carbonate, copper carbonate, basic copper sulfates including particularly tribasic copper sulfate, basic copper nitrates, copper oxychlorides, copper borates, basic copper borates, and mixtures thereof. The particles typically have a size distribution in which at least 50% of particles have a diameter smaller than 0.25 μm, 0.2 μm, or 0.15 μm. At least about 20% and even more than 75% of the weight of the particles may be composed of the substantially crystalline copper salt. Wood or a wood product may be impregnated with copper based particles of the invention.