Polyurethane ureas, polyurethane urea fibres and method for the production thereof

摘要

The invention relates to the production of polyurethane ureas, to novel polyurethane ureas, to a method for the production of elastane fibres and to elastane fibres that are obtained according to said method. The polyurethane ureas are made of an aliphatic or cycloaliphatic diisocyanate, a polymer diol, an aliphatic or cycloaliphatic diamine and optionally a secondary aliphatic amine. The elastane fibres combine excellent mechanical properties with good lightfastness.