Compositions of hexamethoxymethyl melamine(HMMM)一polyol-acrylate can be cured by hybrid polymerization involving the condensation reaction of HMMM with polyol and the free radical polymerization of acrylate

with some synergetic effects such as the enhanced curing rate

energy compensation effect and the formation of polymer alloys in-situ．By investigating the gel time and the polymerization rate

it was found that the acid acts not only as the catalyst for the condensation reaction of HMMM with polyol

but also as the catalyst for the decomposition of the hydroperoxide

generating the initiating free radicals for the polymerization of the acrylate．It was also found that the use of the latent acid catalyst could greatly increase the shelf time of the hybrid polymerization system at room temperature

while maintaining the activity of the formulation at high temperature．