| abstract |
Liquid radiation-curable formulation, in particular for stereolithography, based on at least one compound that contains radically polymerizable groups, and at least one photoinitiator suitable for the polymerization, which formulation additionally contains a polyoxyalkylene-polysiloxane block copolymer that is selected from copolymers of the chemical formulae <IMAGE> <IMAGE> and <IMAGE> wherein: R1 is a hydrogen atom or a C1-C8alkyl group; R2 is a methyl or phenyl group; [T] is a polysiloxane group [PS] terminated as described in the specification in more detail; [PS] is the group of formula <IMAGE> and [Alk] is an alkylene group of 3 to 10 carbon atoms, as well as novel block copolymers of formulae (I) and (II). The cured formulations have, inter alia, superior impact strength. |