USE OF ISOCYANATE OR ISOTHIOCYANATE POLYMERS FOR MAKING MICROCAPSULES

摘要

1. The use of polyiso(thio)cyanurates containing free isocyanate or isothiocyanate groups, which have been prepared by true polymerization of at least one compound having at least two isocyanate or isothiocyanate groups in the presence of a basic catalyst, and which satisfy at least one of the two features below : a) the molecular weight is at least 3 000 ; b) the polyiso(thio)cyanurate is solid at room temperature ; for the production of microcapsules for chemical reaction copy papers.