Patent ID: 8431716

Claim:
A process for preparing solutions, in water, of an alkylimidazolidone (meth)acrylate of formula (I): in which R 1 is a hydrogen atom or a methyl group and A and B represent, independently of one another, a straight-chain alkylene group or branched-chain alkylene group having from 2 to 5 carbon atoms, from solutions of an alkylimidazolidone (meth)acrylate of formula (I) in a light (meth)acrylate of formula (II): in which R 2 is a straight- or branched-chain alkyl group having from 1 to 4 carbon atoms, characterized in that it comprises the following steps: (a) adding, to an initial solution of an alkylimidazolidone (meth)acrylate of formula (I), from 100 to 2000 ppm of at least one polymerization inhibitor, with the exception of 2,2,6,6-tetramethyl-1-piperidinyloxy derivatives; (b) removing, by distillation under reduced pressure, from 75 to 95% by weight of the (meth)acrylate of formula (II) present in the initial solution; (c) continuously adding water at the same time as the distillation is continued in order to remove the remaining (meth)acrylate of formula (II) in the form of a (meth)acrylate of formula (II)/water azeotrope; and (d) bringing the mixture obtained in (c) back to atmospheric pressure and to ambient temperature and introducing an amount of water in order to adjust the water content of the final solution.