| abstract |
Polyhydantoins of the general formula <IMAGE> (I) in which X stands for a bivalent aliphatic, aromatic or araliphatic radical, R1 denotes -CH2-, <IMAGE> -O-, -SO2-, -C(R5,R6) R2 and R3 are identical or different and stand for hydrogen, C1-C6-alkyl or together stand for -(CH2)4-or -(CH2)5-and R5 and R6 are identical or different and stand for C1-C6-alkyl or together stand for -(CH2)4-or -(CH2)5-, are valuable high temperature-resistant polymers, which have utility in particular as film materials. |