Photoabbau von PVC-Folien. III. Einfluß von Wärmestabilisatoren

PVC-films containing variable concentrations of thermal stabilizer (dioctyltin bis-(iso-octylthioglycolate)) have been irradiated by a high-pressure mercury lamp under air and nitrogen. The dehydrochlorination and discoloration have been recorded. The main function of the stabilizer is the suppression of absorptions in the visible region. There are indications of a participation of the stabilizer in the photoreaction.