Quaternization of methacrylic monomers containing tertiary amino groups with acrylic acid derivatives

In aqueous solutions under mild conditions N,N-dimethylaminoethyl methacryl ate and N-(dimethylaminoalkyl)methacrylamides in the presence of hydrogen c hloride add to methyl methacrylate, acrylamide, and N-substituted and N,N-d isubstituted acrylamides to give monomeric quaternary ammonium salts. The r eaction occurs at the amine:hydrogen chloride ratio > 0.8, The reaction rat e and yield are determined by the structure of the N-substituted and N,N-di substituted acrylamides.