Compositions of water soluble glass

C - Chemistry – Metallurgy – 03 – C

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C03C 3/16 (2006.01) C03C 4/00 (2006.01) C03C 13/00 (2006.01) C03C 13/06 (2006.01)

Patent

CA 2333662

A composition for a water soluble glass is described. The composition is unusual in that it contains no or very small quantities (up to 5 mole %) of alkali metal compounds. The composition typically comprises: P2O5: 30 to 60 mole %; CaO: 20 to 35 mole %; MgO: 15 to 25 mole %; ZnO: 0 to 10 mole %; and optionally may contain: Ag2O or Ag2O3: 0 to 5 mole %; and/or total alkali metal compounds (e.g. Na2O and/or K2O): 0 to 5 mole %. The composition is especially suitable for processing into water soluble glass fibres or wool.

L'invention concerne des compositions utilisées pour la formation de verre hydrosoluble, inédites en ce qu'elles sont dépourvues de composés de métaux alcalins ou renferment des quantités très faibles de ces composés (jusqu'à 5 %, en moles). En règle générale, les compositions comprennent, en moles, de 30 à 60 % de P¿2?O¿5?, de 20 à 35 % de CaO, de 15 à 25 % de MgO, et de 0 à 10 % de ZnO. Elles renferment éventuellement, en moles, de 0 à 5 % d'Ag¿2?O ou d'Ag¿2?O¿3? et/ou une quantité totale de composés de métaux alcalins (par exemple, Na¿2?O et/ou K¿2?O) comprise entre 0 et 5 %. Ce type de composition est particulièrement apte au traitement visant à obtenir de la fibre ou de la laine de verre hydrosoluble.

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