Glass composition

C - Chemistry – Metallurgy – 03 – C

Patent

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C03C 4/02 (2006.01) C03C 3/087 (2006.01) C03C 4/08 (2006.01)

Patent

CA 2179146

A neutral grey, heat absorbing soda-lime-silica glass having at 4 mm. control thickness a light transmittance using illuminant A of 10.0 % to 55.0 %, ultra violet transmittance less than 25.0 %, and infrared transmittance is less than about 50.0 % produced with colourants consisting of 0.90 to 1.90 percent by weight total iron oxide as Fe2O3, 0.002 to 0.025 percent Co, 0.0010 to 0.0060 percent Se, 0.10 to 1.0 percent MnO2, and 0 to 1.0 percent TiO2. The flat glass products having such a composition is particularly suitable for use as a privacy glass or sun roof product in trucks and automobiles.

Verre silico-calco-sodique gris neutre, absorbant la chaleur, possédant, pour une épaisseur mesurée de 4 mm, une transmission lumineuse de 10 à 55 % sous illuminant A, une transmission des ultraviolets inférieure à 25 % ainsi qu'une transmission des infrarouges inférieure à environ 50 %, ce verre étant produit à l'aide de colorants composés de: 0,90 à 1,90 % en poids d'oxyde de fer total sous la forme Fe¿2?O¿3?, 0,002 à 0,025 % de Co, 0,0010 à 0,0060 % de Se, 0,10 à 1 % de MnO¿2? et 0 à 1 % de TiO¿2?. Les verres plats possédant une telle composition sont particulièrement conçus pour être utilisés en tant que vitres opaques ou toits ouvrants pour camions et automobiles.

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