This invention relates to storage-stable, liquid, partially trimerized
polyisocyanates having an NCO group content of 24 to 40% by weight, and
comprising 20 to 88% by weight of toluene diisocyanate and 12 to 80% by
weight of a polyisocyanate of the diphenylmethane series. The present
invention also relates to a process for the preparation of the
storage-stable, liquid, partially trimerized polyisocyanates; to
storage-stable, liquid urethane prepolymers of these partially trimerized
polyisocyanates; and to a process for the production of these
storage-stable, liquid, urethane prepolymers.