A method of producing composite metal hydroxide

• Main Authors: KODANI TOSHIKAZU, KURISU HIROFUMI, KAWASE ATSUYA, OKI TAKASHI
• Format: Patent
• Language: English
• Published: 01.03.2003
• Edition: 7
• Subjects: ADHESIVES; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F; COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS; DYES; INORGANIC CHEMISTRY; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS

A composite metal hydroxide is produced by reacting magnesium-containing aqueous solution (X) including water soluble zinc compound,wherein magnesium ion concentration is 0.01 to 1 mol/liter, with alkaline material (Y) at a specific reaction equivalent ratio. Further, a composite metal hydroxide represented by the following general formula (1) is produced by hydrothermally treating thus obtained composite metal hydroxide within a temperature range of 100 to 200 DEG C for aging in chlorine-containing aqueous solution having a specific chlorine ion concentration. Mg1-xZnx(OH)2 (1) wherein x indicates a positive number within a range of 0.003</=x</=0.1. A uniform metallic solid solution can be obtained as a composite metal hydroxide by the above series of processes. Further, its crystal shape can be controlled thereby so as to restrain occurrence of secondary aggregation. Still further, a flame retardant high-molecular composition, obtained by including thus obtained composite metal hydroxide into a high-molecular composition, exerts high flame retardancy and shows superiority in mechanical strength.