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AssigneeOCV Intellectual Capital, LLC
InventorsEmmanuel Lecomte, Eric Dallies, Anne Berthereau
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The present invention relates to a glass composition which is resistant to alkalis and to acids, in particular for the preparation of reinforcing glass strands, which comprises the following constituents within the limits defined below, as percentages by weight: SiO2 ≧58%, preferably ≦65% ZrO2 15-20% R2O (R = Na, K or Li) ≧14% K2O ≦0.1%, preferably ≦0.05%, RO (R = Mg, Ca or Sr) 2.5-6% MgO ≦4% TiO2 >1 and ≦4% the composition additionally being devoid of F, comprising less than 1% of impurities (Al2O3, Fe2O3 and Cr2O3) and satisfying the following relationships: ZrO2+TiO2≧17% ZrO2/TiO2≧6 It also relates to the use of the glass strands obtained in the reinforcing of inorganic materials, for example cementitious materials, or organic materials, for example plastics, and to the composites including such strands.
An alkali and acid resistant glass composition, the glass composition consisting essentially of, as percentages by weight of the glass composition:
A glass strand formed from an alkali and acid resistant glass composition, the glass composition consisting essentially of, as percentages by weight of the glass composition:
A composite comprising:
Dependencies are inferred from the claim text.