Abstract:
The invention relates to a method for impregnating a support matrix with solid and/or liquid compounds using a compressed gas or a compressed mixture of gases at gas densities ranging from 0.15 to 1.3 kg/l and at least two unsymmetrical pressure changes (pulsations). The method is further characterized in that both a multitude of impregnating substances such as biologically active compounds, technical materials or metal-organic compounds, as well as support matrices of biological origin and organic or inorganic substances can be used that have large inner surfaces and/or inner surfaces that are difficult to access.
Abstract:
Procedimiento para la impregnación de una matriz de soporte con compuestos sólidos y/o líquidos con ayuda de gases (mezclas de gases) comprimidos(as), mediante pulsaciones, caracterizado porque el (los) compuesto(s) sólido(s) y/o líquido(s) (sustancia de impregnación) y la matriz de soporte insoluble se ponen en contacto con un gas (una mezcla de gases) comprimido(a) con unas densidades del gas (de la mezcla de gases) de 0,15 a 1,3 kg/l mediando por lo menos dos secuencias de cambio de presiones que transcurren asimétricamente (pulsaciones), de tal manera que por cada pulsación individual con una duración de 5 s a 60 min el respectivo intervalo de tiempo hasta conseguir el máximo de la presión es mayor que el intervalo de tiempo de la disminución de la presión hasta conseguir el mínimo, y efectuándose la impregnación en el estado supercrítico.
Abstract:
The invention relates to a method for impregnating a support matrix with solid and/or liquid compounds using a compressed gas or a compressed mixture of gases at densities ranging from 0.15 to 1.3 kg/l and at least two unsymmetrical pressure changes (pulsations). The method is further characterized in that both a multitude of impregnating substances such as biologically active compounds, technical materials or metal-organic compounds, as well as support matrices of biological origin and organic or inorganic substances can be used that have large inner surfaces and/or inner surfaces that are difficult to access.
Abstract:
Silane-modified oxide or silicate fillers have: (1) a fraction of pearls below 75 microns of below 15 wt.% as determined by sieve analysis; and (2) a median particle size of 130-500 microns, determined by laser diffraction without ultrasonic treatment. An Independent claim is also included for production of the silane-modified fillers by reacting the micro-pearled or microgranulated filler with a silane in a pressure- or temperature-compressed gas.
Abstract:
Silane-modified oxidic or siliceous filler with a bead fraction below 75 .mu.m of less than 15 wt.% and a median particle size distribution between 150 and 500 .mu.m which is produced by the reaction of at least one microbeaded or microgranular, oxidic or siliceous filler in a compressed gas with at least one silane. The silane-modified oxidic or siliceous fillers are used in rubber compounds.
Abstract:
Silane-modified oxide or silicate fillers have: (1) a fraction of pearls below 75 microns of below 15 wt.% as determined by sieve analysis; and (2) a median particle size of 130-500 microns, determined by laser diffraction without ultrasonic treatment. An Independent claim is also included for production of the silane-modified fillers by reacting the micro-pearled or microgranulated filler with a silane in a pressure- or temperature-compressed gas.
Abstract:
The invention relates to a method for impregnating a support matrix with solid and/or liquid compounds using a compressed gas or a compressed mixture of gases at densities ranging from 0.15 to 1.3 kg/l and at least two unsymmetrical pressure changes (pulsations). The method is further characterized in that both a multitude of impregnating substances such as biologically active compounds, technical materials or metal-organic compounds, as well as support matrices of biological origin and organic or inorganic substances can be used that have large inner surfaces and/or inner surfaces that are difficult to access.
Abstract:
The invention relates to a method for impregnating a support matrix with solid and/or liquid compounds using a compressed gas or a compressed mixture of gases at densities ranging from 0.15 to 1.3 kg/l and at least two unsymmetrical pressure changes (pulsations). The method is further characterized in that both a multitude of impregnating substances such as biologically active compounds, technical materials or metal-organic compounds, as well as support matrices of biological origin and organic or inorganic substances can be used that have large inner surfaces and/or inner surfaces that are difficult to access.