Importance

Loading Importance Indicators...

Abstract

The present invention provides unique material systems and methods for 3D printing of articles having enhanced strength and durability. The powder systems comprise a water-soluble crosslinkable agent, and alternatively or additionally, a strengthening component. Preferably, the crosslinkable agent is selected from the group consisting of amino resins, phenol resins, and mixed amino/phenol resins. The strengthening component melts and flows when heated, and resolidifies or cures. Preferably, the strengthening component melts, flows and cures with heat. In another aspect, the invention provides a powder/binder system comprising an oxidant and a reductant (a redox couple). When the binder is applied to the powder, the oxidant and reductant react to generate an acid that catalyzes crosslinking. As a result, the strength of the 3D article builds up at an enhanced rate. The oxidant may be in the powder, and the reductant in the binder; or the reductant may be in the powder, and the oxidant in the binder. Alternatively, both the oxidant and the reductant may be in the powder.

Loading the Abstract Image...

First Claim