JP2016003174A5 - - Google Patents

Claims (10)

Magnesium oxide particles having a BET specific surface area of 80 m ² / g or more and 300 m ² / g or less and CAA 40% of 30 seconds or less, or a magnesium oxide-based additive containing a surface treatment product thereof.   2. The magnesium oxide-based additive according to claim 1, wherein the magnesium oxide particles have an average particle size of 5 μm to 10 μm in a dry particle size distribution. ^{3. The} magnesium oxide-based additive according to claim 1, wherein the magnesium oxide particles have a log differential pore volume peak at a pore radius of 3 nm or more and 4 nm or less of 300 mm ³ / g or more and 500 mm ³ / g or less.   At least one selected from the group consisting of higher fatty acids, higher fatty acid alkaline earth metal salts, coupling agents, esters of fatty acids and polyhydric alcohols, and phosphate esters of phosphoric acid and higher alcohols The magnesium oxide additive according to any one of claims 1 to 3, which is surface-treated with a surface treatment agent.   The composition containing the magnesium oxide type additive of any one of Claims 1-4, and rubber | gum, resin, or an adhesive agent.   6. The resin according to claim 5, comprising at least one resin selected from the group consisting of an ABS resin, a polypropylene resin, a polystyrene resin, a polycarbonate resin, a polyphenylene resin, a polyester resin, and a polyamide resin. Composition.   As rubber, the group consisting of chloroprene rubber, acrylic rubber, nitrile rubber, isoprene rubber, urethane rubber, ethylene propylene rubber, chlorosulfonated polyethylene, epichlorohydrin rubber, silicone rubber, styrene-butadiene rubber, butadiene rubber, fluorine rubber and polyisobutylene rubber 6. A composition according to claim 5, comprising at least one rubber selected from the group consisting of   The molded object obtained from the composition of any one of Claims 5-7. A step of preparing a magnesium hydroxide slurry as a raw material for firing;
The manufacturing method of magnesium oxide including the process of wet-grinding the said magnesium hydroxide slurry, and baking the magnesium hydroxide obtained through the said wet grinding at 350-900 degreeC. The method for producing magnesium oxide according to claim 11, wherein the magnesium hydroxide has a BET specific surface area of 30 m ² / g or more and 70 m ² / g or less and a sedimentation volume of 35 mL or more and 95 mL or less.