| abstract |
Described are a process for preparing polyurethaneureas, novel polyethaneureas, a process for preparing elastane fibre composed of polyurethaneureas and the elastane fibre obtainable by the process. The polyurethaneureas are based on an aliphatic or cycloaliphatic diisocyanate, a polymeric dio1, an aliphatic or cycloaliphatic diamine and optionally a secondary aliphatic amine. The elastane fibre combines excellent mechanical properties with good light fastness. |