Glass fiber composition

C - Chemistry – Metallurgy – 03 – C

Patent

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C03C 13/00 (2006.01)

Patent

CA 2375719

The present invention provides a glass fiber composition comprising: 52 to 62 percent by weight SiO2, 0 to 2 percent by weight Na2O, 16 to 25 percent by weight CaO, 8 to 16 percent by weight Al2O3, 0.05 to 0.80 percent by weight Fe2O3, 0 to 2 percent by weight K2O, 1.7 to 2.6 percent by weight MgO, 0 to 10 percent by weight B2O3, 0 to 2 percent by weight TiO2, 0 to 2 percent by weight BaO, 0 to 2 percent by weight ZrO2, and 0 to 2 percent by weight SrO, and further including at least one material selected from the group consisting of: 0.05 to 1.5 percent by weight Li2O, 0.05 to 1.5 percent by weight ZnO, 0.05 to 3 percent by wight MnO, and 0.05 to 3 percent by weigt MnO2, wherein the glass composition has a forming temperature of no greater than 2280 °F based on an NIST714 reference standard and a liquidus temperature of no greater than 2155 °F. In one nonlimiting embodiment of the invention, the SiO2 content is 57 to 59 percent by weight, the Na2O content is up to 1 percent by weight, the CaO content is 22 to 24 percent by weight, the Al2O3 content is 12 to 14 percent by weight, the Fe2O3 content is up to 0.4 percent by weight, and the K2O content is up to 0.1 percent by weight, and the composition includes at least one material selected from the group consisting of: 0.2 to 1 percent by weight Li2O, 0.2 to 1 percent by weight ZnO, up to 1 percent by weight MnO, and up to 1 percent by weight MnO2.

La présente invention concerne une composition de fibre de verre comprenant 52 à 62 % en masse de SiO2 0 à 2 % en masse de Na2O, 16 à 25 % en masse de CaO, 8 à 16 % en masse de Al2O3, 0,05 à 0,80 % en masse de Fe2O3, 0 à 2 % en masse de K2O, 1,7 à 2,6 % en masse de MgO, 0 à 10 % en masse de B2O3, 0 à 2 % en masse de ZrO2, et jusqu'à 2 % en masse de SrO. La composition comprend en outre au moins un matériau contenant de 0,05 à 1.5 % en masse de Li2O, de 0,05 à 1.5 % en masse de ZnO, 0,05 à 3 % en masse de MnO, et de 0,05 à 3 % en masse de MnO2 auquel cas la composition du verre présente une température de formation n'excédant pas 2280 DEG F selon NIST714 pour une température dite "Liquidus" n'excédant pas 2155 DEG F. Selon une réalisation non limitative, la teneur en SiO2 est de 57 à 59 % en masse, celle du Na2O peut atteindre 1 % en masse, celle du CaO est de 22 à 24 % en masse, celle de Al2O3 est de 12 à 14 % en masse, celle du Fe2O3 peut atteindre 0,4 % en masse, la teneur en K2O pouvant atteindre 0,1 % en masse. Enfin, la composition comporte au moins un matériau choisi dans le groupe constitué de 0,2 à 1 % en masse de Li2O, de 0,2 à 1 % en masse de ZnO, d'un maximum de 1 % en masse de MnO, et d'un maximum de 1 % en masse de MnO2.

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