Carboxyl-Modified Vinyl Chloride/Vinyl Acetate resin VAMA(VMCH) The carboxyl-modified vinyl chloride/vinyl acetate copolymers ... , especially metals, cellulosics,and certain plastics.A high molecular weight resin containing approximately 85 percentvinyl chloride, 14percentvinyl acetate, and 1 percent ... makeheat-sealable packaging coatings. Carboxyl-Modified Vinyl Chloride/Vinyl Acetate resin VAMA(VMCH)