| 摘要 |
<p>1. Polyurethane ureas containing aromatic, sulphur-containing urea groups, characterised in that the urea groups have the structural formula see diagramm : EP0017905,P14,F3 in which X represents -S-, see diagramm : EP0017905,P14,F4 or see diagramm : EP0017905,P14,F5 R1 and R2 are identical or different and represent hydrogen, an alkyl radical, an alkoxy or an alkylmercapto group containing 1 to 4 C atoms and R3 denotes hydrogen, halogen, an alkoxy or an alkylmercapto group containing 1 to 4 C atoms, -COR4 , -COOR4 , see diagramm : EP0017905,P14,F7 -SO2 -R4 or -SO2 -NR4 R5 , wherein R4 and R5 independently of one another represent a linear or branched aliphatic radical containing 1 to 4 C atoms.</p> |
