Active-energy-ray-curable liquid composition, three-dimensional object forming material set, method for producing three-dimensional object, and three-dimensional object producing apparatus

An active-energy-ray-curable liquid composition comprising:

• a monofunctional monomer (A) having a hydrogen-bonding capacity;
• and
• a solvent (B) having a hydrogen-bonding capacity,
• wherein a cured product of the active-energy-ray-curable liquid composition has a water decaying property,
• wherein the solvent (B) comprises at least one selected from the group consisting of a diol that comprises 3 or more but 6 or less carbon atoms, a monoalcohol that comprises 6 or more carbon atoms, a cyclic alcohol that comprises 6 or more carbon atoms, a polypropylene glycol monoether that comprises 6 or more carbon atoms, a carboxylic acid compound, an amine compound, an ester compound, a ketone compound, and a urea compound, and
• wherein a cured product obtained by irradiating the active-energy-ray-curable liquid composition with 500 mJ/cm2 of an active energy ray is a solid having a compressive stress of 0.5 kPa or greater when compressed by 1% at 25 degrees C.

A three-dimensional object forming material set comprising:

• an active-energy-ray-curable liquid composition that comprises
• a monofunctional monomer (A) having a hydrogen-bonding capacity, and
• a solvent (B) having a hydrogen-bonding capacity and comprising at least one selected from the group consisting of a diol that comprises 3 or more but 6 or less carbon atoms, a monoalcohol that comprises 6 or more carbon atoms, a cyclic alcohol that comprises 6 or more carbon atoms, a polypropylene glycol monoether that comprises 6 or more carbon atoms, a carboxylic acid compound, an amine compound, an ester compound, a ketone compound, and a urea compound,
• wherein the active-energy-ray-curable liquid composition satisfies conditions below;
• and
• an active-energy-ray-curable liquid composition that does not have a water decaying property,
• <Conditions>
• a cured product obtained by irradiating the active-energy-ray-curable liquid composition with 500 mJ/cm2 of an active energy ray is a solid having a compressive stress of 2.0 kPa or greater when compressed by 1% at 25 degrees C., and the cured product has a water decaying property.

A method for producing a three-dimensional object, the method comprising

• forming a liquid film with a model material and an active-energy-ray-curable liquid composition that comprises a monofunctional monomer (A) having a hydrogen-bonding capacity and a solvent (B) having a hydrogen-bonding capacity and satisfies conditions below;
• and
• curing the liquid film,
• wherein the method repeats the forming and the curing to form a model part, which is a cured product of the model material, and a support part, which is a cured product of the active-energy-ray-curable liquid composition,
• wherein after forming the model part and the support part, the method removes the support part by water or water vapor, and
• wherein the solvent (B) comprises at least one selected from the group consisting of a diol that comprises 3 or more but 6 or less carbon atoms, a monoalcohol that comprises 6 or more carbon atoms, a cyclic alcohol that comprises 6 or more carbon atoms, a polypropylene glycol monoether that comprises 6 or more carbon atoms, a carboxylic acid compound, an amine compound, an ester compound, a ketone compound, and a urea compound,
• <Conditions>
• a cured product obtained by irradiating the active-energy-ray-curable liquid composition with 500 mJ/cm2 of an active energy ray is a solid having a compressive stress of 2.0 kPa or greater when compressed by 1% at 25 degrees C., and the cured product has a water decaying property.