Wool glass composition
AssigneeOwens-Corning Fiberglas Corporation
InventorCharles F. Rapp
Life of this patent
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Abstract
Fiberizable glass compositions are disclosed. The glass compositions are boron-free wool glasses which are useful as insulation. The glass batch used to prepare these glass compositions contains high amounts of iron oxide.
Claims9
Boron-free glass fibers consisting essentially of, by weight:
- ______________________________________ Ingredients Weight Percent ______________________________________ SiO.sub.2 56.0-64.0 Al.sub.2 O.sub.3 3.0-6.0 Na.sub.2 O 16.0-22.0 K.sub.2 O 0.0-2.0 CaO 3.0-14.0 MgO 1.0-7.0 FeO + Fe.sub.2 O.sub.3 4.1-10.0 ______________________________________
- and up to several percent of each of other substituents including TiO.sub.2, ZnO, SO.sub.3, Li.sub.2 O, MnO, SrO and BaO having a viscosity of log n=2.5 at a temperature of about 1232.degree. C. or less and a liquidus temperature of about 1094.degree. C. or less.
Boron-free glass fibers consisting essentially of, by weight:
- ______________________________________ Ingredients Weight Percent ______________________________________ SiO.sub.2 57.0-64.0 Al.sub.2 O.sub.3 3.0-5.0 Na.sub.2 O 16.0-20.0 K.sub.2 O 0.0-1.5 CaO 4.0-10.0 MgO 1.5-6.5 FeO + Fe.sub.2 O.sub.3 4.1-8.0 ______________________________________
- and up to several percent each of other substituents including TiO.sub.2, ZnO, So.sub.3, Li.sub.2 O, MnO, SrO and BaO having a viscosity of log n=2.5 at a temperature of about 1232.degree. C. or less and a liquidus temperature of about 1094.degree. C. or less.
Boron-free glass fibers consisting of, by weight:
- ______________________________________ Ingredients Weight Percent ______________________________________ SiO.sub.2 61.0 Al.sub.2 O.sub.3 4.5 Na.sub.2 O 19.7 K.sub.2 O 0.3 CaO 7.6 MgO 1.6 FeO + Fe.sub.2 O.sub.3 4.2 ______________________________________
Boron-free glass fibers consisting essentially of, by weight:
- ______________________________________ Ingredients Weight Percent ______________________________________ SiO.sub.2 61.1 Al.sub.2 O.sub.3 4.4 Na.sub.2 O 17.7 K.sub.2 O 0.3 CaO 7.2 MgO 4.5 FeO + Fe.sub.2 O.sub.3 4.1 ______________________________________
Boron-free glass fibers consisting essentially of, by weight:
- ______________________________________ Ingredients Weight Percent ______________________________________ SiO.sub.2 61.0 Al.sub.2 O.sub.3 4.4 Na.sub.2 O 19.7 K.sub.2 O 0.3 CaO 5.9 MgO 3.7 FeO + Fe.sub.2 O.sub.3 4.1 ______________________________________
Boron-free glass fibers consisting essentially of, by weight:
- ______________________________________ Ingredients Weight Percent ______________________________________ SiO.sub.2 61.1 Al.sub.2 O.sub.3 4.4 Na.sub.2 O 21.7 K.sub.2 O 0.3 CaO 4.7 MgO 2.9 FeO + Fe.sub.2 O.sub.3 4.1 ______________________________________
Boron-free glass fibers consisting essentially of, by weight:
- ______________________________________ Ingredients Weight Percent ______________________________________ SiO.sub.2 59.4 Al.sub.2 O.sub.3 4.4 Na.sub.2 O 17.7 K.sub.2 O 0.3 CaO 8.1 MgO 5.1 FeO + Fe.sub.2 O.sub.3 4.1 ______________________________________
Boron-free glass fibers consisting essentially of, by weight:
- ______________________________________ Ingredients Weight Percent ______________________________________ SiO.sub.2 59.4 Al.sub.2 O.sub.3 4.4 Na.sub.2 O 19.7 K.sub.2 O 0.3 CaO 6.9 MgO 4.3 FeO + Fe.sub.2 O.sub.3 4.1 ______________________________________
Boron-free glass fibers consisting essentially of, by weight:
- ______________________________________ Ingredients Weight Percent ______________________________________ SiO.sub.2 59.4 Al.sub.2 O.sub.3 4.4 Na.sub.2 O 21.7 K.sub.2 O 0.3 CaO 5.7 MgO 3.5 FeO + Fe.sub.2 O.sub.3 4.1 ______________________________________
Dependencies are inferred from the claim text.