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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 10501635 B1

PDFFull Text
Date of Patent:
Dec. 10, 2019

Filed:

Mar. 02, 2016

Magnesium oxide powder, resin composition including same, and method for producing magnesium oxide powder

Applicant:

Ube Material Industries, Ltd., Ube-shi, Yamaguchi, JP;

Inventors:

Naoto Nishida, Ube, JP;

Tatsuki Okutsu, Ube, JP;

Naoki Funabashi, Ube, JP;

Akira Yoshida, Ube, JP;

Assignee:

UBE MATERIAL INDUSTRIES, LTD., Ube-shi, Yamaguchi, JP;

Attorney:

Westerman, Hattori, Daniels & Adrian, LLP

Primary Examiner:

Robert T Butcher

Int. Cl.
CPC ...
C09C 1/02 (2006.01); C01F 5/08 (2006.01); C08K 3/22 (2006.01); C08K 3/26 (2006.01); C08K 9/02 (2006.01); C09C 3/06 (2006.01); C01F 5/02 (2006.01); C01F 5/14 (2006.01); C01F 5/24 (2006.01);
U.S. Cl.
CPC ...
C09C 1/028 (2013.01); C01F 5/02 (2013.01); C01F 5/08 (2013.01); C01F 5/14 (2013.01); C01F 5/24 (2013.01); C08K 3/22 (2013.01); C08K 3/26 (2013.01); C08K 9/02 (2013.01); C09C 3/063 (2013.01); C01P 2002/70 (2013.01); C01P 2004/04 (2013.01); C01P 2004/61 (2013.01); C01P 2004/62 (2013.01); C01P 2004/80 (2013.01); C01P 2004/84 (2013.01); C01P 2006/10 (2013.01); C01P 2006/62 (2013.01); C01P 2006/63 (2013.01); C01P 2006/64 (2013.01); C08K 2003/222 (2013.01); C08K 2003/267 (2013.01); C08K 2201/005 (2013.01);
Abstract

To provide magnesium oxide which is excellent in hydration resistance and hardly causes volume expansion due to hydration and the like, a resin composition containing the same, and a method for producing the magnesium oxide powder. Magnesium oxide powder having a coating layer mainly comprising basic magnesium carbonate in the surface layer, when the amounts of substances of water vapor and carbon dioxide among the gas generated by thermal decomposition at 50 to 500° C. are respectively designated as m-HO and m-CO, in a heating evolved gas analysis (EGA-MS) method, the molar fraction represented by m-CO/(m-HO+m-CO) being within the range of 0.3 to 0.6.

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