摘要:
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.
摘要:
Polymerizable materials that contain "oxetanes" (trimethylene oxides) shrink only slightly when polymerized in the presence of a cationic polymerization catalyst. The materials are particular appropriate for coatings and for medical and dental purposes.
摘要:
Radiopaque, abrasion-resistant tooth fillings and inlays that can be polished to a high gloss can be made from a dental material that, in addition to monomeric dimethacrylates, contains a filler mixture of 80 to 90 weight % barium aluminum silicate glass, having a mean particle size of 0.5 to 1.5 .mu.m, and 10 to 20 % weight silicon dioxide, having a mean particle size of 0.04 to 0.06 .mu.m. The dental material is also suitable for anchoring dental prostheses.