Radiation-polymerizable composition and recording material prepared from this composition

A radiation-polymerizable composition comprising

• a) from about 20 to 60% by weight of a constituent which can undergo free-radical polymerization contains at least one terminal ethylenically unsaturated group and has a boiling point above 100.degree. C. under normal pressure, wherein said constituent contains at least 40%, based on the total amount of said constituent, of compounds having at least one urethane group in the molecule,
• b) from about 0.01 to 10% by weight of a compound which is capable of initiating the polymerization of constituent (a), under the action of actinic radiation, and
• c) from about 40 to 80% by weight of a saturated copolymer which is insoluble in water and soluble in organic solvents and in aqueous-alkaline solutions, and which comprises
• c1) from 12 to 27% by weight of units of acrylic acid or methacrylic acid,
• c2) from about 20 to 50% by weight of methyl methacrylate, and
• c3) from about 15 to 50% by weight of an alkyl acrylate, having from 4 to 8 carbon atoms in the alkyl gruop, and
• c4) from about 1 to 20% by weight of a substituted or unsubstituted styrene,
• and has an acid number of about 78 to 176 and a glass transition temperature of about 290 to 340K. wherein the product obtained by multiplying the difference of the glass transition temperatures of the units c2 and c3 in Kelvin by the amount of unit c3 in per cent is at least 4000.