Patent ID: 6833394
Filing Date: 2004-12-21
Classification: A61K,C07F

Abstract:
A dental material comprising a polymerizable binder and at least one chromophoric xerogel of the formula (I):(SiO2)a(SiO1.5-Sp-X-CG)(MenOm)bâ€ƒâ€ƒ(I) in whichMe represents a main-group metal of the 2nd to 3rd main groups or a transition metal of the 4th sub-group of the periodic table of the elements; n is 1 or 2, m being equal to 1 or 2 if n is equal to 1 and m being equal to 3 if n is equal to 2; Sp is a C1 to C10 alkylene radical or C2 to C10 oxyalkylene radical with 1 to 4 oxygen atoms or is absent; X is a compound group COâ€”O, Oâ€”CO, COâ€”NH, NHâ€”CO, Oâ€”COâ€”NH, NHâ€”COâ€”O, NR, O or S or is absent, R being hydrogen or a C1 to C6 alkyl radical; CG is a chromophore; a is an integer from 0 to 20 and b is an integer from 0 to 5.