Glass composition having improved hydraulic resistance for the manufacture of glass reinforcing strands
US9932263B2 · kind B2 · utility
2Cited by
20References
14Claims
0Family size
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Key dates
| Filing date | Aug 22, 2013 |
| Grant date | Apr 3, 2018 |
| Priority date | — |
| Expiry date | Aug 19, 2035 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K7/14
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention relates to a chemically resistant glass composition for the production of reinforcing strands which comprises the following constituents within the limits defined below, expressed in mol %: SiO2 67-72%; ZrO2 5-9.5%, preferably ≥7.5%; R2O (R═Na, K and Li) 11-17%; Li2O 0-5.5%; K2O 0-5.5%; Na2O<10%; and CaO 3-9%, the composition furthermore containing less 1% of impurities (Al2O3, Fe2O3, Cr2O3, TiO2, MgO, SrO, BaO and P2O5) and being free of F. It also relates to the glass strands obtained from this composition and to the composites based on an organic or inorganic material containing such strands.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.