Abstract
New core–shell acrylic latexes designed for crosslinking with cycloaliphatic diepoxide were prepared. The core was prepared using methyl methacrylate, butyl acrylate, and 2-hydroxyethyl methacrylate. The shell contained methyl methacrylate, butyl acrylate, and methacrylic acid. A strong acid acrylate was incorporated into the shell to catalyze the crosslinking reactions, and provide freeze–thaw stability. The crosslinker was co-emulsified with the monomer and added during the latex preparation. The pot-life stability of epoxide was shown to be dependent on latex morphology, initiator system, and reaction conditions. The preparation of stable latex with minimum pre-mature crosslinking required an ambient temperature shell polymerization via a redox initiator system under basic reaction conditions.
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