N‐phenyl piprazine‐polyester derivative as curing activator of unsaturated resins

摘要

AbstractAn oligomeric compound (Pol‐2A) has been synthesized by a Michael‐type addition ofN‐phenyl piperazine to double bonds of the maleic units of a polyester resin. This compound was used as activator (with benzoyl peroxide) in the curing of unsaturated polyester resins and compared in its efficiency withN,N‐dimethylaniline (DMA). Pol‐2A showed actiator characteristics comparable to those of DMA, with a wider range of gel times, and similar mechanical properties of the end products, with the advantage of a severe lowering of diffusibility and related environmental