Konoshima Chemical Co.

Ōsaka, Japan

Konoshima Chemical Co.

Ōsaka, Japan
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An object of the present invention is to provide magnesium oxide that can be preferably used for pharmaceutical applications or as a food additive. In particular, the object is to provide magnesium oxide granules with which tableting problems and quality defects can be reduced, and in more particular, to provide magnesium oxide granules with which tableting problems and quality defects can be reduced and which has less heavy metal incorporation and high purity of magnesium oxide. Provided are magnesium oxide granules for pharmaceutical applications or for addition to food having a BET specific surface area of 7 to 50 m^(2)/g and CAA80/CAA40 of 2 to 7.


An object of the present invention is to provide magnesium oxide that can be preferably used for pharmaceutical applications or as a food additive. In particular, the object is to provide magnesium oxide granules with which tableting problems and quality defects can be reduced, and in more particular, to provide magnesium oxide granules with which tableting problems and quality defects can be reduced and which has less heavy metal incorporation and high purity of magnesium oxide. Provided are magnesium oxide granules for pharmaceutical applications or for addition to food having a BET specific surface area of 7 to 50 m^(2)/g and CAA80/CAA40 of 2 to 7.


Trademark
Konoshima Chemical Co. | Date: 2016-07-19

Industrial chemicals, namely magnesium oxide, none of the foregoing used in the manufacture of magnets, magnetic coated paper and magnetic packaging closures.


There is provided a rare-earth gallium garnet ceramic having a high extinction ratio and a high light transmittance. The rare-earth gallium garnet ceramic contains, as a sintering aid, 5 mass ppm or more and 500 mass ppm or less of Ge calculated as metal, and 20 mass ppm or more and 250 mass ppm or less of Al calculated as metal.


There is provided a rare-earth gallium garnet ceramic having a high extinction ratio and a high light transmittance. The rare-earth gallium garnet ceramic contains, as a sintering aid, 5 mass ppm or more and 500 mass ppm or less of Ge calculated as metal, and 20 mass ppm or more and 250 mass ppm or less of Al calculated as metal.


Patent
Konoshima Chemical Co. | Date: 2015-12-30

Provided are a flame retardant which is good in dispersibility in an organic polymeric material, and does not lower, even after mixed with an organic polymeric material, material properties thereof; a flame retardant composition; and a shaped body. The flame retardant of the present invention includes magnesium hydroxide particles subjected to a surface treatment, the particles satisfying the following (A) to (D): (A) an average particle size is 2 m or less according to a laser diffraction method; (B) a BET specific surface area is 3 to 15 m^(2)/g; (C) a degree of mono-dispersion is 50% or more, the degree of mono-dispersion being represented by the following equation: Degree of mono-dispersion (%) = (average primary particle size [m] of particles according to SEM observation/average particle size [m] of particles according to laser diffraction method) x 100; and, (D) just after 1 mL of a 0.1 M solution of nitric acid is dropwise added at a dropping rate of 0.1 mL/minute to a suspension obtained by adding 1.0 g of the flame retardant to 100 mL of an aqueous mixed solution containing 0.1% by weight of each of a wetting agent and an electrolyte, pH of the suspension is 9.0 or less according to a potentiometric titration.


Provided are magnesium oxide particles which are good in dispersibility in a resin or rubber, can function sufficiently as an acid acceptor or scorch retarder, and do not lower, even after combined with a resin or rubber, material properties thereof; a resin composition; a rubber composition; and a shaped body. The magnesium oxide particles satisfying the following (A) to (C): (A) an average particle size is 5 m or less; (B) a BET specific surface area is 20 m^(2)/g or more and 200 m^(2)/g or less; and (C) a screen residue by a sieve opening of 45 m is 0.1% by weight or less.


Patent
Konoshima Chemical Co. | Date: 2013-08-12

Provided are a flame retardant which is good in dispersibility in an organic polymeric material, and does not lower, even after mixed with an organic polymeric material, material properties thereof; a flame retardant composition; and a shaped body. The flame retardant of the present invention includes magnesium hydroxide particles subjected to a surface treatment, the particles satisfying the following (A) to (D): (A) an average particle size is 2 m or less according to a laser diffraction method; (B) a BET specific surface area is 3 to 15 m^(2)/g; (C) a degree of mono-dispersion is 50% or more, the degree of mono-dispersion being represented by the following equation: Degree of mono-dispersion (%)=(average primary particle size [m] of particles according to SEM observation/average particle size [m] of particles according to laser diffraction method)100; and, (D) just after 1 mL of a 0.1 M solution of nitric acid is dropwise added at a dropping rate of 0.1 mL/minute to a suspension obtained by adding 1.0 g of the flame retardant to 100 mL of an aqueous mixed solution containing 0.1% by weight of each of a wetting agent and an electrolyte, pH of the suspension is 9.0 or less according to a potentiometric titration.


Provided are magnesium oxide particles which are good in dispersibility in a resin or rubber, can function sufficiently as an acid acceptor or scorch retarder, and do not lower, even after combined with a resin or rubber, material properties thereof; a resin composition; a rubber composition; and a shaped body. The magnesium oxide particles satisfying the following (A) to (C): (A) an average particle size is 5 m or less; (B) a BET specific surface area is 20 m^(2)/g or more and 200 m^(2)/g or less; and (C) a screen residue by a sieve opening of 45 m is 0.1% by weight or less.


Trademark
Konoshima Chemical Co. | Date: 2016-03-24

Industrial chemicals; magnesium oxide; magnesium hydroxide; magnesium carbonate; calcium carbonate.

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