Glass fibers and a composition for manufacturing the same
US4615988A · kind A · utility
44Cited by
9References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 19, 1984 |
| Grant date | Oct 7, 1986 |
| Priority date | — |
| Expiry date | Sep 19, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C13/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Glass fibers having the following constituents in the ranges of proportions indicated: SiO.sub.2, 57-70 wt. %; Al.sub.2 O.sub.3, 2-7 wt. %; CaO, 5-10 wt. %; MgO, 0-4 wt. %; B.sub.2 O.sub.3, 0-4.5 wt. %; and F, 0.5-4 wt. %; and wherein B.sub.2 O.sub.3 and F are present in amounts according to the relationship: EQU 3.ltoreq.B.sub.2 O.sub.3 +1.5 F.ltoreq.6.5 and wherein the fibers also contain the alkali oxides Na.sub.2 O and K.sub.2 O, in amounts according to the relationship: EQU 16 wt. %<Na.sub.2 O+K.sub.2 O<20 wt. %. The glass fibers are used advantageously in thermal and/or acoustic insulation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.