Glass Filler Material and Method of Production
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United States of America Patent
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Issued Date -
Oct 16, 2008
app pub date -
Dec 22, 2004
filing date -
Dec 22, 2003
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Abandoned
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Abstract
The present invention relates to a glass filler material with an average particle size of 0.1-20 .mu.m. It further relates to a method for producing a glass filler material. The glass filler material comprises 65-99.95 mol % silicon dioxide (SiO.sub.2), 0-15 mol % aluminum and/or boron oxide (Al.sub.2O.sub.3, B.sub.2O.sub.3), 0-30 mol % zirconium and/or titanium and/or hafnium oxide (ZrO.sub.2, TIO.sub.2, HfO.sub.2), Y.sub.2O.sub.3 and/or Sc.sub.2O.sub.3 and/or La.sub.2O.sub.3 and/or CeO.sub.2 and/or other lanthanide oxides, 0.05-4 mol % alkali metal oxides (Na.sub.2O, Li.sub.2O, K.sub.2O, Rb.sub.2O, Cs.sub.2O), 0-25 mol % earth alkali metal oxides (MgO, CaO, SrO, BaO). The glass filler material shows a low concentration of alkali ions and is used for composites with cationically curing properties and for dental composites and dental restoration materials.
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