Patent ID: 11884000
Assignee: CARBON, INC.
Field: Other special machines (Mechanical engineering)
Classification: CPC B  C | IPC B  C

Claim 0:
1. An additive manufacturing method of making a three-dimensional object comprising polyurea, comprising:
(a) dispensing a one part (1K) dual cure resin into a stereolithography apparatus, the resin comprising:
(i) a photoinitiator,
(ii)) a reactive blocked polyisocyanate, the reactive blocked polyisocyanate comprising the reaction product of a polyisocyanate and an amine or hydroxyl (meth)acrylate or (meth)acrylamide monomer blocking agent,
(iii) a catalyst for the reaction of an isocyanate with water, and
(iv) optionally a polyepoxide;

(b) additively manufacturing from said resin an intermediate object comprising the light polymerization product of said reactive blocked polyisocyanate;
(c) optionally cleaning said intermediate object; and
(d) reacting said polymerization product in said intermediate with water to generate polyamine in situ that sequentially reacts with the remainder of the polymerization product to form urea linkages and thereby produce a three-dimensional object comprising polyurea.