Octomer DBM Dibutyl Maleate 105-76-0 Tiarco Chemical Plasticizers Polyvinyl acetate emulsions & derivatives (PVAc…) Polyvinyl Chloride (PVC) ADHESIVE Octomer DBM is the di-n-butyl ester of maleic acid. This product may be considered for use as a plasticizer for vinyl resins and for applications involving co-polymerization with polyvinyl chloride and vinyl acetates Di-n-butyl ester of maleic acid. Used as a plasticizer for vinyl resins in adhesive applications.