Radiation-sensitive polycondensates, processes for their preparation, coated material and its use

A radiation-sensitive linear saturated homopolycondensate or copolycondensate of the group comprising polyesters, polyester-amides and polyester-imides with benzophenone-di or -tri-carboxylic acid radicals, with at least one of the recurring structural elements of the formula I and/or II ##STR22## and, in the case of a copolycondensate, also recurring structural elements of the formula III and/or IV ##STR23## in which the imide group in structural element II is bonded to two adjacent C atoms, m is 0 or a number from 1 to 4, p is 0 or a number from 1 to 5 and n is 0 or a number from 1 to 3, X is --S-- or --O-- and Y independently is --NR.sup.7 -- or has the same meaning as X, R.sup.1 is alkyl or alkoxy having less than 6 C atoms, aryl having 6 to 10 C atoms, aralkyl having 7 to 10 C atoms or halogen, R is an unsubstituted or substituted divalent aliphatic, cycloaliphatic, araliphatic or aromatic radical and, if X is --O-- or --S-- and Y is --NR.sup.7 --, R and R.sup.7 together are alkylene having 5-7C atoms, R.sup.2 is an unsubstituted or substituted divalent aliphatic or aromatic hydrocarbon radical, R.sup.4 independently has the same meaning as R, and R.sup.6 independently has the same meaning as R.sup.2, R.sup.3 is a divalent saturated aliphatic or aromatic radical, R.sup.5 is a trivalent saturated aliphatic or aromatic radical in which the imide group is bonded to two adjacent C atoms and R.sup.7 is a hydrogen atom, alkyl, cycloalkyl, aryl, aralkyl or alkaralkyl, the copolycondensates containing at least 10 mol %, based on the copolycondensate, of structural elements of the formula I and/or II.