Full Title

Polymeric products of isocyanates or isothiocyanates > with compounds having active hydrogen > characterised by the isocyanates or isothiocyanates used > Polyisocyanates or polyisothiocyanates > having heteroatoms in addition to the isocyanate or isothiocyanate nitrogen and oxygen or sulfur > Nitrogen > characterised by the polyisocyanates used, these having groups formed by oligomerisation of isocyanates or isothiocyanates