I-Ethyl cellulose (ethyl cellulose ether), eyaziwa nangokuthi yi-cellulose ether, okubizwa ngokuthi njenge-EC.
Ukwakheka kwama-molecular kanye nefomula yesakhiwo: [C6HH7O2 (OC2HH5) 3] n.
1.Uku
Lo mkhiqizo unemisebenzi yokubopha, ukugcwalisa, ukwakheka kwamafilimu, njll. Isetshenziselwa ama-resin zokwenziwa amapulasitiki, izigqoko, ama-inks, ama-ejensi okupholisa izilwane, futhi angasetshenziswa njengezifiso zemikhiqizo yezempi kanye nakwizibonelo zezempi.
2. Izidingo zobuchwepheshe
Ngokusho kokusetshenziswa okuhlukile, i-EC eyenziwe yezentengiselwano ingahlukaniswa izigaba ezimbili: ibanga lezimboni kanye nebanga lezemithi, futhi ngokuvamile lincibilika kuma-solvents ezi-organic. Okwebangeni le-EC, okujwayelekile kwekhwalithi kufanele ahlangabezane namazinga e-Chinese Pharmacopoeia edition (noma i-USP XXIV / NF19 kanye neJapan Pharmacopoeia ejwayelekile).
3. Izakhiwo zenyama nezamakhemikhali
1. Ukubukeka: EC kuyinto emhlophe noma ekhanyayo grey fluid powder, iphunga.
2 Inokuqina okuhle okushisayo, okuqukethwe okuphansi kakhulu komlotha lapho kushiswe, kuyaqabukela kunamathela noma kuzwakale ku-astringent. Kungakha ifilimu elinzima. Kusengakugcina ukuguquguquka. Lo mkhiqizo awunobuthi, unezakhiwo eziqinile zokulwa nezempi, futhi u-inert ngokwengqondo, kepha uthambekele ekunciphiseni oxidative ngaphansi kokukhanya kwelanga noma ukukhanya kwe-ultraviolet. Nge-EC ekhethekile enezinhloso ezikhethekile, kunezinhlobo nezinhlobo ezincibilikisa emanzini ahlanzekile. Nge-EC nge-degree yokufaka esikhundleni esingenhla kwe-1.5, i-thermoplastic, iphuzu elithambisayo le-135 ~ 155 ° C, i-pseudo adonsela phansi ka-165 ~ 0.4 g / cm3, kanye ne-density ehlobene ka-1.07 ~ 1.18 g / cm3. Izinga lokuthethelwa kwe-EC lithinta i-soubity, ukumuncwa kwamanzi, izakhiwo zemishini kanye nezakhiwo ezishisayo. Njengoba izinga lokuthezeka lenyuka, i-solubity e-Oy iyancipha, kuyilapho ukuSolubeni ku-organic solvents kukhuphuka. Incibilika ezinhlafunweni eziningi ze-organic. I-solvent esetshenziswa kaningi iTolune / ethanol njenge-4/11 (isisindo) solvent exubile. I-degree of etherification inyuka, iphuzu lokuthambisa nokuncipha kwe-hygroscoscopicity, kanye nokushisa ukusetshenziswa kuyinto-° C ~ 85 ° C. Amandla we-Tensile 13.7 ~ 54.9MPA, ivolumu yokuthula ivolumu 10 * E12 ~ 10 * E14 ω.cm
I-Ethyl Cellulose (DS: 2.3-2.6) iyi-ether engekho emthethweni enamanzi ngaphandle kwamanzi kodwa incibilika ezinhlafunweni ze-organic.
1.Akulula ukushiswa.
2.good ukuqina okushisayo kanye ne-thermos enhle kakhulu.
3.Dila ungashintshi umbala ube ukukhanya kwelanga.
4.Ukuguquguquka.
Izakhiwo ze-Dielectric ze-5.Ood.
6.Kunokumelana okuhle kwe-alkali nokumelana nobuthakathaka kwe-acid.
7.Ukusebenza kokulwa nokukhulisa.
Ukumelana nosawoti 8..OOD, ukumelana nokubanda kanye nokuphikiswa komswakama.
9.Kuqinile kumakhemikhali futhi ngeke awohloke kwisitoreji sesikhathi eside.
I-10. ingahambisana nama-resins amaningi futhi inokuhambisana okuhle nawo wonke amapulasitiki.
11.Kulula ukushintsha umbala ngaphansi kwemvelo eqinile ye-alkaline nokushisa.
4. Indlela yokuchithwa
Ama-solvents asetshenziswa kakhulu asetshenziswa kakhulu we-ethyl cellulose (DS: 2.3 ~ 2.6) ayi-hydrocarbons enephunga elimnandi notshwala. Ama-aromatics angaba yi-benzenene, i-toluene, ethylbenzene, i-xylene, njll., Ngenani lama-60-80%; Ama-alcohols angaba yi-methanol, ethanol, njll., ngenani lama-20- 40%. Ngeza kancane kancane e-EC esitsheni esiqukethe i-solvent ngaphansi kokuvuselelwa kuze kube yilapho inamanzi ngokuphelele futhi ichithiwe.
Cas No: 9004-57-3
5. Isicelo
Ngenxa yokungafakwa emanzini, i-ethyl cellulose isetshenziswa ikakhulukazi njenge-tablet yethebhulethi kanye ne-film coating impahla, njll., Futhi ingasetshenziswa njenge-matrix aclower evinjelwe amathebulethi asetshenzisiwe;
Isetshenziswa njengento exubile ukulungiselela amalungiselelo akhethekile wokukhulula okumisiwe kanye nama-pellets akhipha okuqhubekayo;
Isetshenziswa njengezinto ezisetshenziswayo ze-EcASpApption AUxiliary ukulungiselela ama-microcapsappules asetshenziselwa ukukhishwa okuqhubekayo, ukuze umphumela wezidakamizwa ungakhishwa ngokuqhubekayo futhi uvikele izidakamizwa ezingenamanzi ukuthi zingasebenzi ngaphambi kwesikhathi;
Ingasetshenziswa futhi njengento ehlakazekile, i-Stabilizer, ne-ejenti yokugcina amanzi ezindaweni ezahlukahlukene zemithi yezomthamo ukuvikela umswakama nokuwohloka kwemithi futhi kuthuthukise ukugcinwa kwamathebulethi.
Isikhathi sePosi: Mar-28-2023