Mineral fibres which can dissolve in a physiological medium

US6037284A · kind A · utility

Assignee

• Isover Saint-Gobain · FR

Inventors

• Wolfgang Holstein · Homberg (Efze), DE
• Peter Lohe · Mutterstadt, DE
• Wolfgang Schwab · Kelsterbach, DE
• Alain DeMeringo · Paris, FR
• Sylvie Thelohan · Paris, FR

Key dates

• Filing date: Jun 22, 1994
• Grant date: Mar 14, 2000
• Expiry date: Jun 22, 2014

Classification

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

Abstract

The present invention relates to mineral fiber composition which can dissolve in contact with a physiological medium. The composition of these fibers includes the following components, in accordance with the following proportions by weight: ______________________________________ SiO.sub.2 48 to 67% Al.sub.2 O.sub.3 0 to 8% Fe.sub.2 O.sub.3 0 to 12% ______________________________________ (total iron expressed in this form) ______________________________________ CaO 16 to 35% MgO 1 to 16% Na.sub.2 O + K.sub.2 O 0 to 6.5% P.sub.2 O.sub.5 0 to 5% ______________________________________ taking into consideration that these compositions are also defined by the fact that the contents of these components comply with the following ratios: EQU Na.sub.2 O+P.sub.2 O.sub.5 .gtoreq.2% EQU Fe.sub.2 O.sub.3 +Al.sub.2 O.sub.3 .ltoreq.12% EQU CaO+MgO+Fe.sub.2 O.sub.3 .gtoreq.23%.