Reaction product, preparation thereof and radiation-sensitive material obtained therewith

An ethylenically unsaturated reaction product which contains urea and urethane groups and also carboxyl groups, obtained by reaction of

• i) at least one ethylenically monounsaturated or polyunsaturated mono- or polyalcohol with
• ii) at least one di- or polyisocyanate,
• iii) at least one amino compound of the formula
• R'HN--R--XH
• where
• R is the divalent radical of an alkane, arene, ether, amine, ester, or amide, R' is hydrogen, alkyl, aryl, aralkyl, hydroxyalkyl, aminoalkyl, mercaptoalkyl, or the monovalent radical ##STR6## where n is from 1 to 3, m is from 1 to 10 and R" is H or C.sub.1 -C.sub.4 -alkyl,
• X is 0, S or NR"'.
• R"' is hydrogen, alkyl, aryl, aralykl, hydroxyalkyl, aminoalkyl, or mercaptoalkyl, and/or
• at least one amino compound of the formula ##STR7## where R.sup.1 and R.sup.2 are identical or different and each is the divalent radical of an alkane, arene, ether, amine, ester, or amide,
• R.sup.3 is hydrogen, alkyl, aryl, aralykl, hydroxyalkyl, aminoalkyl or mercaptoalkyl, and
• iv) at least one anhydride of an at least dibasic carboxylic acid, with the proviso that the total number of NCO and anhydride groups in ii) and iv) is equal to or less than the number of groups in i) and iii) which are reactive therewith.