Glass compositions for manufacturing glazing

Details Glass compositions for manufacturing glazing Glass compositions for manufacturing glazing

C - Chemistry, Metallurgy

03

C

C03C 3/087 (2006.01) C03C 3/095 (2006.01) C03C 4/08 (2006.01)

Patent

CA 2130447

Glass compositions for producing architectural or motor vehicle glazing, including the following components (in wt %): 69-75 % SiO2, 0-3 % Al2O3, 2-10 % CaO, 0-2 % MgO, 9-17 % Na2O, 0-8 % K2O, and 0.2-1.5 % Fe2O3 (total iron). Said compositions may also contain fluorine, as well as zinc, zirconium, cerium and titanium oxides, and less than 4 % barium oxide, the sum of the percentages of alkaline-earth oxides being at most 10 %.

La présente invention concerne des compositions de verre aptes à la réalisation de vitrages susceptibles d'être utilisés dans le domaine architectural ou montés sur des véhicules automobiles. Ces compositions comprennent les constituants ci-après selon des teneurs, exprimées en pourcentages pondéraux, définies par les limites suivantes: SiO2 69 à 75 %, Al2O3 0 à 3 %, CaO 2 à 10%, MgO 0 à 2 %, Na2O 9 à 17 %, K2O 0 à 8 %, Fe2O3 (fer total) 0,2 à 1,5 %. Ces compositions étant susceptibles de contenir également du fluor, des oxydes de zinc, de zirconium, de cérium, de titane et moins de 4 % d'oxyde de baryum, la somme des pourcentages des oxydes alcalino-terreux demeurant égale ou inférieure à 10 %.

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