Patent ID: 8609887
Filing Date: 2013-12-17
Classification: C07C,C08G,C09D

Abstract:
1. A process for preparing polyisocyanates comprising biuret groups from a) at least one (cyclo)aliphatic diisocyanate and/or polyisocyanate, b) at least one (cyclo)aliphatic diamine having two primary and/or secondary amino groups, c) optionally at least one acid, and d) optionally at least one solvent, e) optionally in the presence of water or at least one water-releasing compound, the process comprises: i) mixing the components a), b) and optionally c) and also optionally d) and/or e) in a mixing device, thereby forming a reaction mixture, and ii) feeding the reaction mixture obtained in i) into at least one reaction apparatus in which the reaction mixture is treated thermally,