Heat resistant glass fiber composition
US4461840A · kind A · utility
Inventors
Key dates
| Filing date | Jul 19, 1982 |
| Grant date | Jul 24, 1984 |
| Priority date | — |
| Expiry date | Jul 19, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C13/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention concerns glass compositions capable of being attenuated in the form of fibers. These glass fibers comprise the following oxides in the percentages by weight: SiO.sub.2 :37 to 48%; Al.sub.2 O.sub.3 :17 to 25%; CaO:23 to 33%; MgO:0.1 to 7%; Fe.sub.2 O.sub.3 :0.1 to 3%; Na.sub.2 O:2 to 8%; K.sub.2 O:0.1 to 7%, the sum of the percentages of earthalkaline oxides (CaO and MgO) being less than or equal to 34%, and the sum of the alkaline oxides (Na.sub.2 O and K.sub.2 O) being greater than 5%. The invention is applicable to the manufacture of products subjected to elevated temperatures, for instance, products used for insulation purposes, even when such products may be subjected to a temperature as high as 700.degree. C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.