Abstract: A method of reacting phosgene with a second compound containing one or more of hydroxyl, thil, amino and/or formamide groups, wherein phosgene has a GHS hazard identification of GHS06 and is obtainable from the reaction of carbon monoxide and chlorine and wherein the second compound is capable of a chemical reaction with phosgene is provided.

Abstract: A method of reacting a first compound with a second compound, wherein the first compound has a GHS hazard identification of GHS06 and is obtainable from the reaction of at least one first fluid precursor compound and one second fluid precursor compound and wherein the second compound is capable of a chemical reaction with the first compound is provided

Abstract: In a process for producing a spinnable silica sol material, a viscosity value VS is stipulated which the spinnable silica sol material should have after ripening. A viscosity value VR corresponding to VS which the silica sol material has before ripening is ascertained. An aqueous acid solution and a hydrolysable silicon compound are combined. The combined mixture is evaporated to give a single-phase solution while measuring the viscosity of the mixture and the evaporation process is terminated upon reaching the viscosity value VR. The single-phase solution thus obtained is then ripened to give a silica sol material with the viscosity value VS. The process exhibits reduced waste and more exact reproducibility of the spinning sol properties during the synthesis and an increased space-time yield in the production of biologically degradable and/or resorbable fibers and nonwoven fabrics.

Abstract: The present invention relates to an improved process for producing a biodegradable and/or absorbable silica sol material which is advantageous especially with regard to the reproducibility of the material, the rapidity of the synthesis and the possibility of being able to produce the silica sol material on an industrial scale. A further subject matter of the invention relates to a biodegradable and/or absorbable silica sol material which can be produced by the synthesis process according to the invention.

Abstract: In a process for producing a spinnable silica sol material, a viscosity value VS is stipulated which the spinnable silica sol material should have after ripening. A viscosity value VR corresponding to VS which the silica sol material has before ripening is ascertained. An aqueous acid solution and a hydrolysable silicon compound are combined. The combined mixture is evaporated to give a single-phase solution while measuring the viscosity of the mixture and the evaporation process is terminated upon reaching the viscosity value VR. The single-phase solution thus obtained is then ripened to give a silica sol material with the viscosity value VS. The process exhibits reduced waste and more exact reproducibility of the spinning sol properties during the synthesis and an increased space-time yield in the production of biologically degradable and/or resorbable fibres and nonwoven fabrics.

Abstract: The present invention relates to an improved process for producing a biodegradable and/or absorbable silica sol material which is advantageous especially with regard to the reproducibility of the material, the rapidity of the synthesis and the possibility of being able to produce the silica sol material on an industrial scale. A further subject matter of the invention relates to a biodegradable and/or absorbable silica sol material which can be produced by the synthesis process according to the invention.