초록

the composition having a liquidus temperature of 1225.degree. C. or less, and a viscosity at least 1000 poise at the liquidus temperature.

대표청구항 ▼

[ We claim:] [1.] An insulation wool formulated from naturally-occurring rock minerals selected from the group consisting of basalts, granites, limestone, dolomite and sandstone, optionally including high alumina materials or boron containing minerals, or combinations thereof, having a composition c

[ We claim:] [1.] An insulation wool formulated from naturally-occurring rock minerals selected from the group consisting of basalts, granites, limestone, dolomite and sandstone, optionally including high alumina materials or boron containing minerals, or combinations thereof, having a composition consisting essentially of the following components, given in wt %, based on the total weight of the composition:______________________________________ SiO.sub.2 51-68 wt % Al.sub.2 O.sub.3 13-16 wt % ______________________________________ h the total amount of SiO.sub.2 +Al.sub.2 O.sub.3 being from 66 to 75 wt %,______________________________________ Na.sub.2 O 0-6 wt % K.sub.2 O 0-5 wt % ______________________________________ h the total amount of Na.sub.2 O+K.sub.2 O being from 0 to 7.5 wt %,______________________________________ MgO 1-9 wt % CaO 8-20 wt % ______________________________________ h the total amount of MgO+CaO being from 12 to 27 wt %,______________________________________ Fe.sub.2 O.sub.3 2-10 wt % TiO.sub.2 0-3 wt % P.sub.2 O.sub.5 less than 1 wt %, B.sub.2 O.sub.3 0-3 wt % ______________________________________ composition having a liquidus temperature of 1225.degree. C. or less, and a viscosity at least 1000 poise at the liquidus temperature.