Magnesium hydroxide particles, and resin composition containing same
A resin composition, magnesium hydroxide technology, applied in the direction of magnesium hydroxide, magnesium compounds, inorganic chemistry, etc., can solve the problems of flame retardants that cannot be used in flame retardants, misuse, high alpha ray release, etc., to achieve less flow Sexual and dispersive effects
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Embodiment 1
[0106]
[0107] In container, add magnesium hydroxide (purity is more than 95 mass %, and alpha ray emission is 0.028c / cm 2 / h, and the median particle size is 4.9 μm), and iron oxide (purity of 98.4% by mass or more, α-ray emission of 0.001c / cm 2 / h, and the median particle size is 0.53 μm), the calcium oxide (purity is more than 99.5% by mass, and the amount of α-ray emission is 0.002c / cm 2 / h, and the median particle size is 1.04 μm), and the concentration of magnesium hydroxide is 30% by weight of ion-exchanged water and stirred. Then, the obtained white precipitate was filtered, washed with water, and dried. The dried product was pulverized with a ball mill, and baked at 1400° C. for 2 hours in an electric furnace. The calcined product was pulverized by a ball mill for 4 hours, and then classified to obtain magnesium oxide powder. The median particle size of the obtained magnesium oxide powder was 9.6 μm, and the crystallite diameter was 29.9×10 -9 m.
[0108] The ...
Embodiment 2
[0120] In container, add magnesium hydroxide (purity is more than 95 mass %, and alpha ray emission is 0.049c / cm 2 / h, and the median diameter is 5.0 μm), and relative to magnesium hydroxide, the addition of Fe is 450 ppm of iron oxide, the addition of Ca is 700 ppm of calcium oxide, and the concentration of magnesium hydroxide is 30% by weight of ion-exchanged water and stirred. In addition, iron oxide and calcium oxide are the same as those used in Example 1. Then, the obtained white precipitate was filtered, washed with water, and dried. The dried product was pulverized with a ball mill, and baked at 1400° C. for 2 hours in an electric furnace. The calcined product was pulverized by a ball mill for 8 hours, and then classified to obtain magnesium oxide powder. The median particle size of the obtained magnesium oxide powder was 6.8 μm, and the crystallite diameter was 27.6×10 -9 m.
[0121] The obtained magnesium oxide powder was added to a container with an inner volum...
Embodiment 3
[0124] Magnesium hydroxide (purity is more than 95% by mass, α ray emission is 0.049c / cm2) used in the container is added in Example 2 2 / h, and the median diameter is 5.0 μm), and relative to magnesium hydroxide, the addition of Fe is 50 ppm of iron oxide, the addition of Ca is 200 ppm of calcium oxide, and the concentration of magnesium hydroxide is 30% by weight of ion-exchanged water and stirred. In addition, iron oxide and calcium oxide are the same as those used in Example 1. Then, the obtained white precipitate was filtered, washed with water, and dried. The dried product was pulverized with a ball mill, and baked at 1400° C. for 2 hours in an electric furnace. The calcined product was pulverized by a ball mill for 8 hours, and then classified to obtain magnesium oxide powder. The median particle size of the obtained magnesium oxide powder was 5.8 μm, and the crystallite diameter was 26.6×10 -9 m.
[0125] The obtained magnesium oxide powder was added to a containe...
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