Fibrous basic magnesium sulfate powder and method for producing same
AssigneeUbe Material Industries, Ltd.
InventorsRyoichi Nomura, Tatsuki Okutsu
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Abstract
A fibrous basic magnesium sulfate powder which does not contain CO2 in an amount of more than 0.15% by mass, or a fibrous basic magnesium sulfate powder which has a ratio of the infrared absorption within the wave number range of 1,400-1,440 cm−1 relative to the infrared absorption within the wave number range of 3,180-3,530 cm−1 of 0.005 or less. The fibrous basic magnesium sulfate powders exhibit improved physical property-improving effect when dispersed in a resin material.
Claims15
A fibrous basic magnesium sulfate powder containing CO2 in an amount of not more than 0.15 wt. %.
A fibrous basic magnesium sulfate powder in which a ratio of an amount of infrared rays absorbed in the wave number region of 1,400 to 1,440 cm−to an amount of infrared rays absorbed in the wave number region of 3,180 to 3,530 cm−1 is not more than 0.005.
A method for preparing a fibrous basic magnesium sulfate powder which comprises drying water-containing fibrous basic magnesium sulfate particles in a drying oven adjusted to contain CO2 gas in an amount of not more than 360 μL per one liter of the volume of the drying oven.
A resin composition containing a fibrous basic magnesium sulfate powder dispersed therein in which the fibrous basic magnesium sulfate powder contains CO2 in an amount of not more than 0.15 wt. %.
A resin composition containing a fibrous basic magnesium sulfate powder dispersed therein in which the fibrous basic magnesium sulfate powder in which a ratio of an amount of infrared rays absorbed in the wave number region of 1,400 to 1,440 cm−to an amount of infrared rays absorbed in the wave number region of 3,180 to 3,530 cm−is not more than 0.005.
Dependencies are inferred from the claim text.