Glass compositions and fibers made therefrom
USRE29388E · kind E · reissue
Assignee
Inventor
Key dates
| Filing date | Jan 13, 1977 |
| Grant date | Sep 6, 1977 |
| Priority date | — |
| Expiry date | Jan 13, 1997 |
Classification
- Technology area (CPC —)General
Abstract
Glass compositions, having improved chemical resistance and useful in the form of fibers for reinforcing cementitious materials, consisting essentially of: PA1 From 50 to 75 percent by weight Silica PA1 From 10 to 25 percent by weight R.sub.2 O PA1 from .[.1.]. .Iadd.7 .Iaddend.to 15 percent Titania PA1 From 1 to 20 percent by weight Zirconia PA1 From 0.8 to 20 percent by weight Rare Earth Oxide PA1 From 0 to 20 percent by weight Boric Oxide PA1 From 0 to 10 percent by weight R.sup.1 O PA1 from 0 to 1 percent by weight Fluorine as (fluoride) PA1 From 0 to 2 percent by weight Al.sub.2 O.sub.3 PA1 from 0 to 1 percent by weight P.sub.2 O.sub.5 PA1 from 0 to 1 percent by weight Chlorine (as chloride) Where R.sub.2 O is sodium oxide, potassium oxide or a mixture of both, optionally including up to 5% by weight of lithium oxide (based on the total composition) and R.sup.1 O is MgO, CaO, BaO, or SrO, or a mixture of two or more thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.