US 11,724,956 B2
Glass composition and glass powder, in particular for the use in the dental field
Sabine Pichler-Wilhelm, Landshut (DE); Jens Suffner, Landshut (DE); and Simone Monika Ritter, Mainz (DE)
Assigned to SCHOT T AG, Mainz (DE)
Filed by SCHOTT AG, Mainz (DE)
Filed on Jul. 28, 2020, as Appl. No. 16/941,238.
Claims priority of application No. 10 2019 120 434.8 (DE), filed on Jul. 29, 2019.
Prior Publication US 2021/0032154 A1, Feb. 4, 2021
Int. Cl. C03C 3/062 (2006.01); A61L 24/12 (2006.01); A61K 6/836 (2020.01); A61K 6/824 (2020.01)
CPC C03C 3/062 (2013.01) [A61K 6/824 (2020.01); A61K 6/836 (2020.01); A61L 24/12 (2013.01); C03C 2201/12 (2013.01)] 20 Claims
 
1. A glass comprising the following components in % by weight:
 
 
 
 Component Proportion (% by weight)
 
 
 
 component 1 22 to 42
 
 component 2 28 to 53
 
 component 3 5 to 35
 
 component 4 7 to 20
 
 
wherein the proportion (% by weight) component 1 comprises a sum proportion of SiO2 and P2O5,
wherein the proportion (% by weight) component 2 comprises a sum proportion MgO, CaO, SrO, BaO, ZnO, Al2O3, Sc2O3, Y2O3, La2O3 and Yb2O3,
wherein the proportion (% by weight) of component 3 comprises a sum proportion of Li2O, Na2O, K2O and Cs2O,
wherein the component 4 is F,
wherein the glass contains at least one X-ray absorbing component selected from the group consisting of: Y2O3, Yb2O3, La2O3, SrO, BaO, and Cs2O,
wherein the total content of B2O3, ZnO, ZrO2 and La2O3 is less than 20% by weight, and
wherein the glass contains less than 5% by weight of B2O3.