Glass fibers decomposable in a physiological medium

US5108957A · kind A · utility

Assignee

• Isover Saint-Gobain · FR

Inventors

• Isabelle Cohen · Chambéry, FR
• Sylvie Thelohan · Paris, FR
• Hans Furtak · Frankenthal (Pfalz), DE
• Hartmut Tiesler · Frankfurt am Main, DE

Key dates

• Filing date: Aug 9, 1990
• Grant date: Apr 28, 1992
• Expiry date: Aug 9, 2010

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C03C2213/02
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Glass compositions useful for forming fibers which are readily able to be degraded in a physiological medium such as that found in a human body. Advantageous compositions formed according to the present invention comprise the following components, set forth in percent by weight: PA1 SiO.sub.2 : 57 to 70% PA1 Al.sub.2 O.sub.3 : 0 to 5% PA1 CaO: 5 to 10% PA1 MgO: 0 to 5% PA1 Na.sub.2 O+K.sub.2 O: 13 to 18% PA1 B.sub.2 O.sub.3 : 2 to 12% PA1 F: 0 to 1.5% PA1 P.sub.2 O.sub.5 : 0 to 4% PA1 Impurities: less than 2%