Methyl Chloride → beta-Methacryloxyethyl diethylmethyl ammonium

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Alternatively, the objective mono- or co-polymers are obtained by the following procedure. As an example, dimethyl sulfate or methyl chloride was added to an ethereal β-diethylaminoethyl methacrylate solution and then the resulting solution was kept in an ice-water bath for several hours to yield a viscous quaternary ammonium salt compound, β-methacryloxyethyl diethylmethyl ammonium methosulfate or β-methacryloxyethyl diethylmethyl ammonium chloride. The thus produced quaternary ammonium salt monomer or its mixture with other co-polymerizable vinyl monomer was subjected to a further reaction at about 60° C. overnight after addition of a polymerization initiator such as hydrogen peroxide to yield the desired mono- or co-polymers.

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