Resyn SB-321 Hydroxyethyl cellulose polyvinyl acetate Vinamul Polymers Polyvinyl acetate emulsions & derivatives (PVAc…) >> PVAc homopolymers ADHESIVE RESYN® SB-321 emulsion is a hydroxyethyl cellulose stabilized polyvinyl acetate homopolymer. RESYN SB-321 is particularly useful in specialty adhesive formulations where borated products are used. Hydroxyethyl cellulose stabilized polyvinyl acetate homopolymer. Used in specialty adhesive formulations where borated products are used.