This disclosure relates to fiberizable glass compositions, fibers and the method of making textile glass fibers which are boron and fluorine free. Boron and fluorine have now been recognized as potential pollutants in the manufacture of fiberizable glasses and glass fibers and the following disclosu
This disclosure relates to fiberizable glass compositions, fibers and the method of making textile glass fibers which are boron and fluorine free. Boron and fluorine have now been recognized as potential pollutants in the manufacture of fiberizable glasses and glass fibers and the following disclosure eliminates these pollutants by substituting TiO2, MgO and ZnO in the basic three component glass composition of SiO2, Al2O3 and CaO. The preferred glass composition consists essentially of, by weight, 54.5 to 60% SiO2, 9 to 14.5% Al2O3, 17 to 24% CaO, 2 to 4% TiO2, 1.5 to 4% MgO and 1 to 6% RO, wherein RO is an oxide selected from the group consisting of ZnO, SrO and BaO, calculated as ZnO. The preferred composition may also include alkali metal oxides selected from the group consisting of Na2O, K2O and Li2O.
대표청구항▼
A boron and fluorine free fiberizable glass composition having a liquidus temperature of about 2250°F., or less and having a viscosity of log 2.5 poises at about 2450°F., or less, consisting essentially by weight of 54.5 to 60% SiO2, 9 to 14.5% Al2O3, 17 to 24% CaO, 2 to 4% TiO2, 1.5 to 4% MgO, 1 to
A boron and fluorine free fiberizable glass composition having a liquidus temperature of about 2250°F., or less and having a viscosity of log 2.5 poises at about 2450°F., or less, consisting essentially by weight of 54.5 to 60% SiO2, 9 to 14.5% Al2O3, 17 to 24% CaO, 2 to 4% TiO2, 1.5 to 4% MgO, 1 to 6% RO, wherein R is selected from the group consisting of Zn, Sr and Ba and RO is calculated as the equivalent molecular weight percent of ZnO and an alkali metal oxide selected from the group consisting of Na2O, K2O and Li2O, comprising between 1% and 3% Na2O and K2O, the K2O calculated as Na2O in equivalent weight percent and between 1% and 2% by weight Li2O, and combinations of such alkali metal oxides in equivalent total weight percent, the total Na2O, K2O, and Li2O not exceeding 3% by weight.
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이 특허를 인용한 특허 (30)
Han, Lixiong; Du, Xun; Yao, Yuan; Chen, Dequan, Boron and fluorine-free glass fiber composites.
Bürger, Gerhard, Highly temperature-resistant and chemically resistant glass and glass fiber having improved UV light transmission and the use thereof.
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