Magnesium oxide powder, resin composition including same, and method for producing magnesium oxide powder
US10501635B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 2, 2016 |
| Grant date | Dec 10, 2019 |
| Priority date | — |
| Expiry date | Mar 27, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K2201/005
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
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-H2O and m-CO2, in a heating evolved gas analysis (EGA-MS) method, the molar fraction represented by m-CO2/(m-H2O+m-CO2) being within the range of 0.3 to 0.6.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.