POST-MODIFIED POLYCARBODIIMIDES

摘要

A process of preparing a post-modified polycarbodiimide, the process includes combining a diisocyanate, a moisture scavenger, a monoisocyanate, and a catalyst in a reaction vessel; and heating the reaction vessel to a temperature and a time sufficient to form a capped polycarbodiimide wherein the capped polycarbodiimide has 0.25 wt % or less of free isocyanate groups; and the combining and heating are conducted in the absence of a solvent.

主权项

1. A process of preparing a capped polycarbodiimide, the process comprising:
combining in a reaction vessel a diisocyanate, a moisture scavenger, a monoisocyanate, and a catalyst to form a reaction mixture; and heating the reaction mixture to a temperature and for a time sufficient to form a capped polycarbodiimide; wherein:
the capped polycarbodiimide has 0.25 wt % or less of free isocyanate groups;the capped polycarbodiimide is a liquid at 25° C.; andthe combining and heating are conducted in the absence of a solvent.