12-08-2021 дата публикации
Номер: US20210245428A1
Принадлежит:
Provided herein is a resin product useful for the production of three-dimensional objects by additive manufacturing, and methods using the same. The resin may include a reactive blocked prepolymer comprising a prepolymer blocked with reactive blocking groups; a polyol; a photoinitiator; and at least one organometallic catalyst. A packaged product useful for the production of three-dimensional objects by additive manufacturing, the product comprising a single container having a single chamber and a resin in the chamber with all components mixed together, is also provided. 1. A resin product useful for the production of three-dimensional objects by additive manufacturing , comprising:(a) a reactive blocked prepolymer comprising a prepolymer blocked with reactive blocking groups (e.g., in an amount of from 5 to 90 percent by weight);(b) a polyol (e.g., a diol or triol) (e.g., in an amount of from 5 to 30 or 40 percent by weight);(c) a photoinitiator (e.g., a free radical photoinitiator) (e.g., in an amount of from 0.1 to 4 percent by weight);(d) at least one non-tin organometallic catalyst (e.g., in a total amount of from 0.01, 0.05, 0.1, 0.2, or 0.3 percent by weight to 1, 2 or 3 percent by weight), said at least one non-tin organometallic catalyst comprising a metal carboxylate;(e) optionally, but in some embodiments preferably, a reactive diluent (e.g., in an amount of from 1 or 5 percent by weight to 40 or 50 percent by weight);(f) optionally, but in some embodiments preferably, a filler (e.g., in an amount of from 1, 2, 5 or 10 percent by weight to 50 percent by weight); and(g) optionally, but in some embodiments preferably, a pigment or dye (e.g., in an amount of from 0.05, 0.1 or 0.5 percent by weight to 2, 4 or 6 percent by weight).2. The resin of claim 1 , wherein said prepolymer comprises a polyurethane prepolymer claim 1 , a polyurea prepolymer claim 1 , a polyurethane-polyurea copolymer claim 1 , or a combination thereof.3. The resin of claim 1 , said ...
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