Abstract
This paper reports the preparation and cure behavior of several interesting epoxy resins containing SO2 groups incorporated into epoxy/polyester powder formulations. The cure behavior was examined by gelfraction, DSC, dynamic viscoelastic analyzer, rigid body pendulum viscoelastic analyzer and FT-IR. In each case, the BPS modified epoxy resins exhibit lower temperature cure response in proportion to the number of SO2 groups. Generally, increasing the level of external curing catalyst in conventional systems lowers the cure response temperature. In this case, however water and salt spray resistance of the cured film is deficient for practical use. The deficiency, can be avoided by modifying the resin components, in that for instance the BPS modification of epoxy resin is effective. The mechanical film properties are also suitable for practical use.
