Chemically resistant glass composition for the manufacture of glass reinforcing strands

US8535438B2 · kind B2 · utility

Assignee

• OCV Intellectual Capital, LLC · US

Inventors

• Anne Berthereau · Chambéry, FR
• Jerome Lalande · Saint-Maur-des-Fossés, FR

Key dates

• Filing date: Oct 25, 2007
• Grant date: Sep 17, 2013
• Expiry date: Feb 25, 2030

Classification

• Technology area (CPC —): General

Abstract

The present invention relates to a chemically resistant glass composition for the production of reinforcing strands which comprises the following constituents within the limits defined below, expressed in mol %: SiO2 67-72%; ZrO2 5-9.5%, preferably ≧7.5%; R2O (R=Na, K and Li) 11-17%; Li2O 0-5.5%; K2O 0-5.5%; Na2O<10%; and CaO 3-9%, the composition furthermore containing less 1% of impurities (Al2O3, Fe2O3, Cr2O3, TiO2, MgO, SrO, BaO and P2O5) and being free of F. It also relates to the glass strands obtained from this composition and to the composites based on an organic or inorganic material containing such strands.