Curable resin composition, cured object, and three-dimensional object

The patent uses a composite resin system combining radically polymerizable compounds (acrylates, vinyl ethers) with oxazoline compounds. This composite approach allows the radical polymerization to provide fast curing while the oxazoline segments contribute to enhanced mechanical properties including elastic modulus, elongation, and impact resistance through their unique molecular structure and intermolecular interactions.

The patent modifies the chemical structure parameters of the polymerizable monomers by incorporating specific functional groups (oxazoline rings, hydroxyl groups, ether linkages) into the monomer molecules. These structural parameter changes enable the cured resin to achieve both high curability and superior mechanical properties by balancing crosslinking density with molecular flexibility.

The patent carefully selects monomers with specific molecular weight ranges and functional group configurations to maintain low viscosity. By using monomers with appropriate chain lengths and incorporating flexible linkages (ether groups, hydroxyl groups), the composition achieves low viscosity for easy handling while the crosslinking structure formed during curing provides high elastic modulus and impact resistance.

The patent employs specific photopolymerization initiators and catalysts as intermediaries that enable efficient polymerization at low monomer concentrations. These intermediaries facilitate the formation of a highly crosslinked network structure without requiring high monomer concentrations, thereby maintaining low viscosity in the uncured state while achieving excellent mechanical properties in the cured state.