A polymerizable nanogel was synthesized with methacrylate-modified polysiloxane, urethane dimethacrylate (UDMA) and isobornyl methacrylate (IBMA) as main raw materials in the presence of a thiol chain transfer agent. The kinetics of photopolymerization, shrinkage stress, mechanical properties and thermostability of UV-cured materials with different contents of nanogel were investigated. The results indicated that the addition of nanogel could delay the onset of stress and further reduce the overall photopolymerization stress without compromising the mechanical properties of the resulting polymers, when the added mass fraction was within 20%. Moreover, with the addition of nanogel, the thermostability of the resulting polymer was strengthened.Cited