Glass flake
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United States of America Patent
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Oct 23, 2007
Grant Date -
Mar 3, 2005
app pub date -
Apr 30, 2004
filing date -
Aug 29, 2003
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The present invention provides a glass flake that is substantially free of boron trioxide (B.sub.2O.sub.3), barium oxide (BaO), zinc oxide (ZnO), and fluorine (F) and has sufficient heat resistance and good formability for glass flake. The glass flake of the present invention includes a glass composition that contains the following components, expressed in mol %; 50.ltoreq.SiO.sub.2.ltoreq.65; 4.ltoreq.Al.sub.2O.sub.3<12; 5.ltoreq.SrO.ltoreq.25; 10<(MgO+SrO).ltoreq.30; 20.ltoreq.(MgO+CaO+SrO).ltoreq.45; and 0<(Li.sub.2O+Na.sub.2O+K.sub.2O)<2; wherein the glass composition is substantially free of B.sub.2O.sub.3, BaO, ZnO, and F. This glass flake is useful for resin compositions, paints, cosmetics, ink compositions, and the like.
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