Filler based on silicon dioxide, method for its preparation, and its use
AssigneeHeraeus Kulzer GmbH
InventorsDetlef Heindl, Albert Erdrich
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Abstract
Porous silicon dioxide glass is proposed as an inorganic filler for polymerizable materials, which has a particle size of 0.5-50 micrometers, a pore size of 20-120 nanometers, a pore volume of 200-1000 mm.sup.3 /g and a BET surface area of 10-100 m.sup.2 /g. The polymer products containing the filler are characterized by a very good resistance to abrasion.
Claims19
Finely divided filler on a silicon dioxide basis comprising porous silicon dioxide glass having a particle size of 0.5-50 micrometers, a pore size of 20-120 nanometers, a pore volume of 200-1000 mm.sup.3 /g and a BET surface area of 10-100 m.sup.2 /g wherein the porous silicon dioxide glass is provided with an impregnant containing monomeric (meth)acrylic acid esters.
Method of preparing polymerizable materials comprising using as a filler therein, a finely divided filler on a silicon dioxide basis comprising porous silicon dioxide glass having a particle size of 0.5-50 micrometers, a pore size of 20-120 nanometers, a pore volume of 200-1000 mm.sup.3 /g and a BET surface area of 10-100 m.sup.2 /g.
A polymerizable material comprising as a filler therein a finely divided filler on a silicon dioxide basis comprising porous silicon dioxide glass having a particle size of 0.5-50 micrometers, a pore size of 20-120 nanometers, a pore volume of 200-1000 mm.sup.3 /g and a BET surface area of 10-100 m.sup.2 /g.
Dependencies are inferred from the claim text.