ALF HITEL BUNES, DMD, Endodontic Resident, Department of Endodontics, School of Dental Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA

Synthesis and characterization of colored EUDRAGIT® as enteric coating material

“…SEC measurements were performed with an Agilent 1200 series, with a G1310A pump, a RID G1362A detector and a PSS GRAM guard/1000/30 Å (10 lm particle size) column at 40 8C. The eluent was dimethylacetamide (DMAc) with addition of 0.21% of LiCl at a flow rate of 1 mL min 21 . UV/Vis absorption spectra were recorded with a Specord 250 spectrometer (Analytik Jena) in Suprasil quartz glass cuvettes 104-QS (Hellma Analytics) with a thickness of 10 mm.…”

“…These dyes bear for example a mono/bifunctional chlorazin group or a vinylsulphonyl group, which can directly react with amines from the textile polymer to form covalent bonds . Another synthesis strategy that was patented by Dynapol ® uses azo‐coupling reactions onto aromatic amines, however, with several steps and harsh reaction conditions . This contribution aims for a more moderate method using substances with low toxicity, which react under mild conditions without any chemical modification of the dyes.…”

“…[17][18][19] Another synthesis strategy that was patented by Dynapol V R uses azocoupling reactions onto aromatic amines, however, with several steps and harsh reaction conditions. [20][21][22] This contribution aims for a more moderate method using substances with low toxicity, which react under mild conditions without any chemical modification of the dyes. Since all the mentioned methods are only combined with one or more additional synthesis steps, a more simple strategy using polymer and dye in a direct manner seems to be a polymer analogous reaction or postmodification.…”