Build materials for printing 3D articles

A polymerizable liquid comprising:

• an acrylate component;
• a composite resin comprising a curable carrier and polymeric particles dispersed in the curable carrier;
• and
• a photoinitiator component,
• wherein the acrylate component is present in an amount of 30-70 wt. % based on a total weight of the polymerizable liquid;
• wherein the polymeric particles exhibit a core-shell architecture;
• wherein the polymeric particles comprise an elastomeric core;
• and
• wherein the polymeric particles comprise a thermoset shell.

A method of printing a three-dimensional article comprising:

• providing a polymerizable liquid comprising an acrylate component, a composite resin comprising a curable carrier and polymeric particles dispersed in the curable carrier, and a photoinitiator component, wherein the acrylate component is present in an amount of 30-70 wt. % based on a total weight of the polymerizable liquid, and
• irradiating the polymerizable liquid with light to form the article, the article comprising a polymeric composite material including a polymeric matrix comprising an acrylate phase and a cured carrier phase, wherein the polymeric particles are disposed in the polymeric matrix;
• wherein:
• the polymerizable liquid is provided in a layer-by-layer process;
• the composite resin is present in the polymerizable liquid in an amount of 20-70 wt. % based on total weight of the polymerizable liquid;
• the polymeric particles of the composite resin comprise an elastomer;
• the polymeric particles are present in the composite resin in an amount of 20-60 wt. % based on total weight of the composite resin;
• the polymeric particles have an average size less than 1 μm;
• and
• the curable carrier comprises unsaturated polyester, vinyl ester, or mixtures thereof.