Claims
- 1. Composite products made up of cement reinforced by the glass fibers comprising, in percentages by weight:
- SiO.sub.2 : 25 to 54%
- Al.sub.2 O.sub.3 : 20 to 40%
- MgO: 24 to 40%
- ZrO.sub.2 : 1 to 5%
- P.sub.2 O.sub.5 : 0 to 10%
- TiO.sub.2 : 0 to 10%
- B.sub.2 O.sub.3 : 0 to 10%
- F: 0 to 5%
- Cr.sub.2 O.sub.3 : 0 to 2%
- the sum of 2MgO+Al.sub.2 O.sub.3 comprising at least 70% of the total weight.
- 2. Products in accordance with claim 1 wherein said glass fibers comprise 35 to 54% SiO.sub.2.
- 3. Products in accordance with claim 1 wherein said glass fibers comprise:
- SiO.sub.2 : 40 to 51%
- Al.sub.2 O.sub.3 : 20 to 35%
- MgO: 25 to 35%
- ZrO.sub.2 : 1 to 5%
- the sum of 2MgO+Al.sub.2 O.sub.3 comprising at least 75%.
- 4. Products in accordance with claim 1 wherein said glass fibers comprise:
- SiO.sub.2 : 25 to 51%
- Al.sub.2 O.sub.3 : 20 to 35%
- MgO: 24 to 37%
- ZrO.sub.2 : 1 to 5%
- and further characterized in that it comprises at least one ingredient chosen from the following group: P.sub.2 O.sub.5, TiO.sub.2, B.sub.2 O.sub.3, F, Cr.sub.2 O.sub.3, the sum of the ingredients of said group being between 1% and 20% by weight.
- 5. Products in accordance with claim 1 wherein said glass fibers comprise:
- SiO.sub.2 : 28 to 48%
- Al.sub.2 O.sub.3 : 20 to 32%
- MgO: 25 to 35%
- ZrO.sub.2 : 1 to 5%
- and further characterized in that it comprises at least one ingredient chosen from the following group: P.sub.2 O.sub.5, TiO.sub.2, B.sub.2 O.sub.3, F, Cr.sub.2 O.sub.3, the sum of the ingredients of said group being between 3% and 15% by weight.
Priority Claims (1)
Number |
Date |
Country |
Kind |
79 02276 |
Jan 1979 |
FRX |
|
Parent Case Info
This application is a continuation of copending application Ser. No. 115,679, filed Jan. 28, 1980, now abandoned.
US Referenced Citations (6)
Foreign Referenced Citations (4)
Number |
Date |
Country |
1026928 |
Mar 1958 |
DEX |
1040444 |
Oct 1958 |
DEX |
1582381 |
Sep 1969 |
FRX |
52-04520 |
Jan 1977 |
JPX |
Continuations (1)
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Number |
Date |
Country |
Parent |
115679 |
Jan 1980 |
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