Glass compositions
US5100842A · kind A · utility
3Cited by
7References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 16, 1990 |
| Grant date | Mar 31, 1992 |
| Priority date | — |
| Expiry date | Jul 16, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C11/002
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Glass compositions for use in the preparation of glass microspheres and having reduced 2 Pas (20 poise) temperatures comprise 38 to 44% SiO.sub.2, 14 to 22% B.sub.2 O.sub.3, 9 to 16% Al.sub.2 O.sub.3, 22 to 26% CaO and optionally MgO, 0 to 8% Na.sub.2 O, 0 to 2% Li.sub.2 O, 0 to 2% K.sub.2 O and 0 to 1% Fe.sub.2 O.sub.3, the sum of B.sub.2 O.sub.3 and Na.sub.2 O being at least 19%, said percentage by weight.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.