Polimery 2005, No 5, 383
Polyesters containing trioxoimidazolidine rings in the chains were synthesized using N,N'-bis(2-hydroxyethyl) parabanate (BHEP) or N,N'-bis(2-hydroxypropyl) parabanate (BHPP) as diol components. The product obtained from BHPP as well as classical polyester, prepared with use of propylene glycol, were crosslinked with either styrene or propylene glycol dimethacrylates. Both resins containing trioxoimidazolidine rings showed shorter gelation time and shorter time of thermal stability at temp. 70°C in comparison with classical polyester resins. Crosslinked resins were cured with Interox BP-50-P1 in presence of N,N'-dimethylaniline. It was found, using derivatographic method, that the resins prepared this way, containing the rings in the chain, degrade at lower temperature than typical polyester resins. However, DSC measurements show that the former ones exhibit higher glass transition temperature (Tg).
Key words: polyester resins, polycondensation, trioxoimidazolidine ring, N,N'-bis(2-hydroxyalkyl) parabanates, thermal stability, gelation time
Polyesters with trioxoimidazolidine rings (in English)