阅读说明：本技术 采用封闭型多异氰酸酯的三维打印 (Three-dimensional printing with blocked polyisocyanates ) 是由 T·陈 于 2019-03-22 设计创作，主要内容包括：本公开描述了三维打印套装、用于三维打印的系统和三维打印的方法。在一个实例中,三维打印套装可以包括颗粒状构建材料和粘结剂。颗粒状构建材料可以包括金属粒子。粘结剂可以包括多羟基多元醇和具有多个封闭的异氰酸酯基团的水分散性封闭型多异氰酸酯。封闭的异氰酸酯基团可以包括经由可通过加热至解封温度而断裂的不稳定键键合到封闭的异氰酸酯基团的碳原子上的封闭基团。不稳定键断裂可以产生与氢和异氰酸酯基团反应的释放的封闭基团。(The present disclosure describes a three-dimensional printing suite, a system for three-dimensional printing, and a method of three-dimensional printing. In one example, a three-dimensional printing set may include a granular build material and a binder. The granular build material may include metal particles. The binder may include a polyol and a water dispersible blocked polyisocyanate having a plurality of blocked isocyanate groups. The blocked isocyanate group may include a blocking group bonded to a carbon atom of the blocked isocyanate group via a labile bond that is cleavable by heating to a deblocking temperature. Labile bond cleavage can produce a liberated blocking group that reacts with hydrogen and isocyanate groups.)