Boron-free glass fiber composition, glass fiber prepared from the same, and composite material comprising the glass fiber
US10287206B2 · kind B2 · utility
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Key dates
| Filing date | Dec 22, 2017 |
| Grant date | May 14, 2019 |
| Priority date | — |
| Expiry date | Dec 22, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C3/087
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A composition of matter, including the following components expressed as percentage by weight: SiO2, 58-60.4%; Al2O3, 14-16.5%; CaO, 14.1-16.5%; MgO, 6-8.2%; Li2O, 0.01-0.4%; Na2O+K2O, less than 1.15%; K2O, greater than 0.5%; TiO2, less than 1.5%; and Fe2O3, less than 1%. The range of the weight percentage ratio CaO/MgO is greater than 2 and less than or equal to 2.4. A glass fiber prepared from the composition is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.