Abstract: The additive of the present invention is intended for transferring, to a final coating, biocidal, UV protection, and flame retardant properties and in general the selected properties intrinsic to the metals and compounds of Ag, Au, Cu, Mg, Zn, Bi, Sb, said additive includes the use of solvents, surfactants, dispersants and resins that make it compatible with the final coating. Said coating treated with additive ensures perfect distribution and dispersion of the nanoparticles throughout it, without the need to be subjected to an inorganic substrate.

Abstract: The present invention refers to a process for the preparation of an additive with a metallic hydroxide base, and especially of magnesium hydroxide, to be integrated in coatings with the purpose to give them higher flame retarding properties. The hydroxide has an average particle size that is selected from between 1 nanometer and 10 microns preferable with a wide variety, the magnesium hydroxide is submitted to a treatment of washing and dispersion, mainly so that they efficiently are dispersed in, and do not interfere with, the desired properties of the coating. The nature of the coating function is selected from the materials and the conditions of the treatment, as well as the size of the particle. The objective coating can have a base of water, solvents, oil, and alcohol. Compared with coatings formed with other flame retarding compositions, the additive of the invention presents less loss of weight by means of burning through ASTM D1360 standards.

Abstract: The additive of the present invention is intended for transferring, to a final coating, biocidal, UV protection, and flame retardant properties and in general the selected properties intrinsic to the metals and compounds of Ag, Au, Cu, Mg, Zn, Bi, Sb, said additive includes the use of solvents, surfactants, dispersants and resins that make it compatible with the final coating. Said coating treated with additive ensures perfect distribution and dispersion of the nanoparticles throughout it, without the need to be subjected to an inorganic substrate.

Abstract: The present invention relates to a procedure for preparation by wet reduction method of nanometric particles of metallic silver, with diameter in the range of 1 to 100 nm and an average diameter of 20 to 40 nm, with monodispersion characteristics, stability greater than 12 months and in a wide range of concentrations. The process comprises 4 steps: a) preparation of the reducing agent solution, taken from the group of tannins and preferably being tannic acid; b) preparation of a solution of a soluble silver salt; c) reaction and, d) solid-liquid separation; the particle size is determined by the nature of the reducing agent and by the pH control of the currents. The final step is designed for separating and concentrating the material after which the user can prepare the product for integration thereof in the desired medium.

Abstract: The additive of the present invention is intended for transferring, to a final coating, biocidal, UV protection, and flame retardant properties and in general the selected properties intrinsic to the metals and compounds of Ag, Au, Cu, Mg, Zn, Bi, Sb, said additive includes the use of solvents, surfactants, dispersants and resins that make it compatible with the final coating. Said coating treated with additive ensures perfect distribution and dispersion of the nanoparticles throughout it, without the need to be subjected to an inorganic substrate.

Abstract: This invention refers to a novel process for obtaining high purity magnesium hydroxide from a solid starting material containing magnesium in the form of, and/or combined with, carbonates, oxides and/or hydroxides, either natural or synthetic. The process comprises leaching the starting material to dissolve the magnesium; the solution is treated with alkali to precipitate the high purity magnesium hydroxide, and the remaining mother liquor is fed to a regeneration step of both the alkali used in the precipitation of high purity magnesium hydroxide, and the acid for leaching. The process of the invention is characterized by recycling reactants (acid and alkali) regenerated in the same process.

Abstract: The present invention relates to a method of obtaining an additive for coatings that contains nanoparticles of one or more compounds, preferably metallic, selected in relation to the property that is desired to be transferred to the coating, which comprises a first pretreatment phase in which the water content of the active agent is reduced, replacing it with a vehicle compatible with the coating, and a second phase in which it is mixed with a resin compatible with the coating, a dispersant and a solvent, which are also compatible with it. The additive produced by this method contains nanoparticles of one or more compounds, preferably metallic, which become dispersed homogeneously in the coating once incorporated therein.

Abstract: This invention refers to a novel process to obtain magnesium hydroxide and sodium sulfate from a solid raw material, which contains sodium and magnesium soluble salts, preferably in the form of sulfates, coming from a natural source or as a byproduct of an industrial process. The process consisting in the conditioning of the raw material to guarantee the correct concentrations of sodium and magnesium sulfates that is subjected to a salting-out crystallization when mixed with sodium sulfate obtaining sodium sulfate; the resulting solution is subjected to an alkali treatment to precipitate the magnesium hydroxide and the mother liquor is fed to a regeneration stage of the alkali used in the precipitation of the magnesium hydroxide as well in the sodium sulfate solution for the crystallization. The crystallization can be performed as a multistage process countercurrent to increase the purity of sodium sulfate.

Abstract: The present invention refers to a process for the preparation of an additive with a metallic hydroxide base, and especially of magnesium hydroxide, to be integrated in coatings with the purpose to give them higher flame retarding properties. The hydroxide has an average particle size that is selected from between 1 nanometer and 10 microns preferable with a wide variety, the magnesium hydroxide is submitted to a treatment of washing and diffusion, mainly so that they efficiently are dispersed in, and do not interfere with, the desired properties of the coating. The nature of the coating function is selected from the materials and the conditions of the treatment, as well as the size of the particle. The objective coating can have a base of water, solvents, oil, and alcohol. Compared with coatings formed with other flame retarding compositions, the additive of the invention presents less loss of weight by means of burning through ASTM D1360 standards.

Abstract: This invention refers to a novel process for obtaining high purity magnesium hydroxide from a solid starting material containing magnesium in the form of, and/or combined with, carbonates, oxides and/or hydroxides, either natural or synthetic. The process comprises leaching the starting material to dissolve the magnesium; the solution is treated with alkali to precipitate the high purity magnesium hydroxide, and the remaining mother liquor is fed to a regeneration step of both the alkali used in the precipitation of high purity magnesium hydroxide, and the acid for leaching. The process of the invention is characterized by recycling reactants (acid and alkali) regenerated in the same process.

Abstract: The present invention refers to a method to prepare nanometric magnesium hydroxide particles. These particles have an average diameter that ranges from 90 to 110 nm, and that could range from 20 to 160 nm, with monodisperse and stable characteristics for greater than 12 month in a wide range of concentrations. This process includes 3 stages: one reaction stage performed in two steps, one of maturation and one of purification. The first step of the reaction is developed in micro blending zone, and the second one is the stabilization of suspension. During the second stage, the particles maturation is developed through a chemical-mechanic treatment. The last stage is designed to purify and concentrate the material, as well as its preparation to integrate it to the desired form.

Abstract: The present invention relates to a method of obtaining an additive for coatings that contains nanoparticles of one or more compounds, preferably metallic, selected in relation to the property that is desired to be transferred to the coating, which comprises a first pretreatment phase in which the water content of the active agent is reduced, replacing it with a vehicle compatible with the coating, and a second phase in which it is mixed with a resin compatible with the coating, a dispersant and a solvent, which are also compatible with it. The additive produced by this method contains nanoparticles of one or more compounds, preferably metallic, which become dispersed homogeneously in the coating once incorporated therein.

Abstract: This invention refers to a novel process to obtain magnesium hydroxide and sodium sulfate from a solid raw material, which contains sodium and magnesium soluble salts, preferably in the form of sulfates, coming from a natural source or as a byproduct of an industrial process. The process consisting in the conditioning of the raw material to guarantee the correct concentrations of sodium and magnesium sulfates that is subjected to a salting-out crystallization when mixed with sodium sulfate obtaining sodium sulfate; the resulting solution is subjected to an alkali treatment to precipitate the magnesium hydroxide and the mother liquor is fed to a regeneration stage of the alkali used in the precipitation of the magnesium hydroxide as well in the sodium sulfate solution for the crystallization. The crystallization can be performed as a multistage process countercurrent to increase the purity of sodium sulfate.

Abstract: The present invention relates to a procedure for preparation by a wet reduction method of nanometric particles of metallic silver, with diameter ranging from 1 to 100 nm and an average diameter of 20 to 40 nm, with monodispersion characteristics, stabilities exceeding 12 months and in a wide range of concentrations. The process comprises 4 stages: a) preparation of the reducing agent solution, taken from the tannins group and preferably tannic acid; b) preparation of a solution of soluble silver salts; c) reaction and, d) liquid-solid separation; the particle size is determined by the nature of the reducing agent and by the pH control of the currents. The final stage is designed for separating and concentrating the material after which the user can prepare the product for integration thereof in the desired medium.