Alumina powder

An alumina powder containing a hydroxycarboxylic acid and an alkaline component contains amorphous alumina, pseudoboehmite, or boehmite, and satisfies all of (1) to (4). (1) A colloidal dispersion A with 2.5% by mass of Al2O3 consisting of the alumina powder and distilled water is free from precipit...

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Bibliographic Details
Main Authors Kuroda, Taketoshi, Terao, Masaki, Tsuneishi, Taku
Format Patent
LanguageEnglish
Published 05.05.2020
Subjects
ADHESIVES
CHEMISTRY
COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS
DYES
INORGANIC CHEMISTRY
METALLURGY
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
MIXING, e.g. DISSOLVING, EMULSIFYING, DISPERSING
NATURAL RESINS
PAINTS
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
POLISHES
PREPARATION OF CARBON BLACK
TRANSPORTING
TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS,TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES
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Summary:An alumina powder containing a hydroxycarboxylic acid and an alkaline component contains amorphous alumina, pseudoboehmite, or boehmite, and satisfies all of (1) to (4). (1) A colloidal dispersion A with 2.5% by mass of Al2O3 consisting of the alumina powder and distilled water is free from precipitate, and has a light transmittance of at least 80% measured at a wavelength of 500 nm and an optical path length of 10 mm. (2) A colloidal dispersion B with 15% by mass of Al2O3 consisting of the alumina powder and distilled water is free from precipitate. (3) The dispersions A and B have a pH in a range of 5 to 8. (4) A colloidal dispersion C with 2.5% by mass of Al2O3 consisting of the alumina powder and methanol is free from precipitate, and has a light transmittance of at least 80% measured under the above condition.
Bibliography:Application Number: US201716462253