Patent ID: 8669302

Claim:
A composite material comprising: (a) as the filler component a total quantity of fillers in the range 0.5 through 60 wt. %, in relation to the total weight of the composite material wherein the total quantity of fillers is a mixture of fillers comprising (a1) a total quantity in the range 0.5 through 60 wt. % of non-agglomerated, organically surface-modified nanoparticles with an average particle size of less than 200 nm and (a2) a total quantity in the range 0 through 55 wt. % of microparticles with an average particle size in the range 0.4 μm through 10 μm, and (a3) optionally additional fillers, wherein the weight percentages given for components (a1) and (a2) in each case relate to the total weight of the composite material, (b) as the monomer component a total quantity of polymerizable monomers in the range 24 through 98.5 wt. %, in relation to the total weight of the composite material, wherein the total quantity of polymerizable monomers comprises (b1) one, two or a plurality of monomers selected from the group consisting of monomers with the structure Q(Y x Z e ) b , wherein the following applies: Q represents a saturated or olefinically unsaturated polyalicyclic structure element selected from the group consisting of bicyclic, tricyclic, tetracyclic, pentacyclic and hexacyclic hydrocarbon radicals, wherein optionally one, two or a plurality of the hydrogen atoms of this polyalicyclic structure element Q not substituted by substituents Y x Z e is or are substituted by alkyl groups, alkoxy groups, halogen atoms or trifluormethyl groups; b is an integer selected from the group of integers 1, 2, 3 and 4, each Z represents a structure element, which independently of any other structure elements Z is selected from the group consisting of —O—(C═O)—CH═CH 2 , —O—(C═O)—C(CH 3 )═CH 2 , —(C═O)—CH═CH 2 , —(C═O)—C(CH 3 )═CH 2 —CH═CH 2 , —C(CH 3 )═CH 2 and —O—CH═CH 2 , each index e is an integer, which independently of any other indices e is selected from the group of integers 1, 2, 3 and 4, each index x independently of any other indices x represents 0 or 1, each Y in the structure Q(Y x Z e ) b where x=1 represents a structure element, which binds the polyalicyclic structure element Q with e structure elements Z, wherein each Y is selected independently of any other structure elements Y, (b2) optionally one, two or a plurality of additional radically polymerizable monomers from the group consisting of acrylates and methacrylates, wherein the further radically polymerizable monomer(s) are not compounds (monomers) of the structure Q(Y x Z e ) b defined above, (c) one or a plurality of initiators and/or catalysts, and (d) additionally optionally one or a plurality of other additives.