Thiol urethane group-containing polymerizable composition

A polymerizable composition comprising

• (i) 0.01 to 90 wt.-% of at least one inorganic filler component,
• (ii) 5 to 99.97 wt.-% comprising at least two urethane acrylates, wherein one urethane acrylate is at least one urethane acrylate of formula I having a divalent hydrocarbon group
• with A=O, if B═NH or A=NH, if B═O,
• R1═H or CH3, R2═H or CH3,
• R5 and R6 are each independently selected from linear C2 to C6 alkylene groups or linear C2 to C6 oxyalkylene groups, wherein R5 and R6 are optionally each independently have a C1-C3 alkyl group or (meth)acryloxymethylene group, and
• R8 is a divalent hydrocarbon group having 6 to 12 carbon atoms, and the second urethane acrylate comprises at least one bifunctional thiolurethane group and at least one olefinic group, wherein
• the second urethane acrylate having a structure of the general formula V,
• R14(—S—(C═O)—NH—R13)w, with w=1 to 10
• V
• wherein residue R13 is a residue each independently selected from residues having at least one olefinic group, and R14 having one of the following structures of the formulas VIa to VIg
• with R7 in formula VIa to VIg each independently selected from
• with R8 each independently being a divalent hydrocarbon group having 6 to 12 C-atoms, with R10 each independently selected from linear C2 to C6 alkylene groups or linear C2 to C6 oxyalkylene groups, wherein R10 optionally each independently having a C1-C3 alkyl group or (meth)acryloxymethylene group and with R15 each independently having H or C1 to C4 alkyl, and/or mixtures of urethane acrylates comprising these,
• (iii) 0.01 to 25 wt.-% comprising at least one di-, tri-, tetra- or multi-functional monomer having at least one ether group, thioether group, an at least at least tri-functional triester and/or a di-functional diester, wherein the diester is selected from tricyclodecane dimethanol dimethacrylate and tricyclodecane dimethanol diacrylate, or mixtures comprising at least two of these di-, tri-, tetra- or multi-functional monomers,
• (iv) 0.01 to 10 wt.-% of at least one initiator, an initiator system, optionally at least one stabilizer and optionally at least one pigment and optionally further additives, wherein the total composition of the polymerizable composition amounts up to 100 wt.-%.