The monomeric compounds used according to the invention for homoor copolymerization are prepared by reacting a sulfonyl isocyanate of the formula IV. R SO NCO wherein R is a saturated aliphatic alkyl or alkoxy group each with one to six carbon atoms, which may be substituted by one to three halogen atoms, or a cycloaliphatic alkyl group, or an aryl or aryloxy group each with six or carbon atoms, w