Phosphorus-containing coated magnesium oxide powder, method for producing same, and resin composition containing such powder
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United States of America Patent
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Jul 1, 2008
Grant Date -
Aug 9, 2007
app pub date -
Dec 1, 2005
filing date -
Dec 1, 2004
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Abstract
A phosphorus-containing coated magnesium oxide powdered material comprising a coated magnesium oxide powdered material having a surface coating layer comprised of a double oxide, wherein the phosphorus-containing coated magnesium oxide powdered material has a coating layer comprised of a magnesium phosphate compound in at least part of a surface of the coated magnesium oxide powdered material, wherein the content of the magnesium phosphate compound in the coated magnesium oxide powdered material is 0.1 to 10% by mass, in terms of phosphorus; a method for producing a phosphorus-containing coated magnesium oxide powdered material, wherein the method comprises treating a coated magnesium oxide powdered material having a surface coating layer comprised of a double oxide with a phosphorus compound, and then calcining the resultant powdered material at 300.degree. C. or higher to form a magnesium phosphate compound in at least a part of a surface of the coated magnesium oxide powdered material; and a resin composition comprising the powder.
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