dibutyltin mono(2-ethylhexyl) maleate: a comprehensive review in pvc calendering introduction dibutyltin mono(2-ethylhexyl) maleate (dbm-ehm), often referred to simply as dibutyltin maleate or tin maleate, is a widely utilized organotin compound acting primarily as a heat stabilizer in the processing of polyvinyl chloride (pvc). its effectiveness in preventing degradation, discoloration, and property loss during high-temperature processing,...