Ethyl cellulose(Ethyl cellulose ether), tseem hu ua cellulose ether, hu ua EC.
Molecular muaj pes tsawg leeg thiab cov qauv qauv: [C6H7O2(OC2H5)3] n.
1.Siv
Cov khoom no muaj lub luag haujlwm ntawm kev sib txuas, txhaws, ua zaj duab xis, thiab lwm yam. Nws yog siv rau cov khoom siv hluavtaws, txheej, roj hmab hloov, inks, insulating cov ntaub ntawv, thiab tseem siv tau los ua cov nplaum, textile finishing agents, thiab lwm yam, thiab tuaj yeem siv los ua tsiaj txhu hauv kev ua liaj ua teb thiab tsiaj txhu pub additive, siv los ua cov nplaum hauv cov khoom siv hluav taws xob thiab cov tub rog propellants.
2. Kev xav tau
Raws li kev siv sib txawv, kev lag luam EC tuaj yeem muab faib ua ob pawg: qib kev lag luam thiab qib tshuaj, thiab feem ntau yog soluble hauv cov kuab tshuaj organic. Rau qib kws tshuaj EC, nws tus qauv zoo yuav tsum ua raws li cov qauv ntawm Suav Pharmacopoeia 2000 tsab (los yog USP XXIV / NF19 tsab thiab Japanese Pharmacopoeia JP tus qauv).
3. Lub cev thiab tshuaj muaj zog
1. Cov tsos mob: EC yog dawb los yog lub teeb grey kua hmoov, tsw tsw.
2. Cov Khoom: Cov khoom lag luam EC feem ntau insoluble hauv dej, tab sis soluble hauv cov kuab tshuaj organic sib txawv. Nws muaj thermal stability zoo, tsis tshua muaj tshauv cov ntsiab lus thaum hlawv, thiab tsis tshua muaj sticks los yog xav tias astringent. Nws tuaj yeem tsim ib zaj duab xis tawv. Nws tseem tuaj yeem tswj tau yooj yim. Cov khoom no tsis muaj tshuaj lom, muaj zog tiv thaiv kab mob lom, thiab metabolically inert, tab sis nws yog nquag oxidative degradation nyob rau hauv tshav ntuj los yog ultraviolet lub teeb. Rau cov hom phiaj tshwj xeeb EC, kuj tseem muaj hom uas yaj hauv lye thiab dej ntshiab. Rau EC nrog rau qib ntawm kev hloov pauv saum toj no 1.5, nws yog thermoplastic, nrog rau qhov muag muag ntawm 135 ~ 155 ° C, melting point ntawm 165 ~ 185 ° C, pseudo tshwj xeeb gravity ntawm 0.3 ~ 0.4 g / cm3, thiab tus txheeb ze ntom ntawm 1.07 ~ 1.18 g / cm3. Lub degree ntawm etherification ntawm EC cuam tshuam rau solubility, dej nqus, mechanical zog thiab thermal zog. Raws li qib ntawm etherification nce, solubility hauv lye txo, thaum solubility hauv cov kuab tshuaj organic nce. Soluble nyob rau hauv ntau cov organic solvents. Feem ntau siv cov kuab tshuaj yog toluene / ethanol li 4/1 (qhov hnyav) sib xyaw hnyav. Qib ntawm etherification nce, qhov muag muag thiab hygroscopicity txo, thiab kev siv kub yog -60 ° C ~ 85 ° C. Tensile zog 13.7 ~ 54.9Mpa, ntim resistivity 10 * e12 ~ 10 * e14 ω.cm
Ethyl cellulose (DS: 2.3-2.6) yog non-ionic cellulose ether uas yog insoluble hauv dej tab sis soluble hauv cov kuab tshuaj organic.
1.Tsis yooj yim rau hlawv.
2.Qhov zoo thermal stability thiab zoo heev thermos-plasticity.
3.Tsis hloov xim rau hnub ci.
4. Zoo yoog raws.
5.Zoo dielectric zog.
6.Nws muaj kev ua haujlwm zoo alkali thiab tsis muaj zog acid.
7.Kev ua haujlwm zoo los tiv thaiv kev laus.
8.Zoo ntsev tsis kam, txias tsis kam thiab noo noo nqus tsis kam.
9.Nws yog ruaj khov rau cov tshuaj thiab yuav tsis deteriorate nyob rau hauv lub sij hawm ntev cia.
10.Nws tuaj yeem sib haum nrog ntau cov resins thiab muaj kev sib raug zoo nrog txhua tus plasticizers.
11.Nws yog ib qho yooj yim los hloov xim nyob rau hauv muaj zog alkaline ib puag ncig thiab kub.
4. Txoj kev sib cais
Feem ntau siv cov kuab tshuaj sib xyaw rau ethyl cellulose (DS: 2.3 ~ 2.6) yog cov tshuaj tsw qab hydrocarbons thiab cawv. Aromatics tuaj yeem yog benzene, toluene, ethylbenzene, xylene, thiab lwm yam, nrog rau 60-80%; cawv tuaj yeem yog methanol, ethanol, thiab lwm yam, nrog tus nqi ntawm 20-40%. Maj mam ntxiv EC rau lub thawv uas muaj cov kuab tshuaj nyob rau hauv nplawm kom txog thaum nws tag nrho ntub thiab yaj.
CAS Nr .: 9004-57-3
5. Daim ntawv thov
Vim nws cov dej insolubility,ethyl celluloseFeem ntau yog siv los ua cov ntsiav tshuaj binder thiab zaj duab xis txheej khoom, thiab lwm yam, thiab tseem tuaj yeem siv los ua cov khoom siv matrix los npaj ntau hom matrix sustained-tso ntsiav tshuaj;
Siv los ua cov khoom sib xyaw ua ke los npaj cov txheej txheem-tso tawm thiab kev txhawb nqa-tso pellets;
Nws yog siv los ua encapsulation auxiliary khoom los npaj sustained-tso microcapsules, thiaj li hais tias cov nyhuv tshuaj yuav raug tso tawm tsis tu ncua thiab tiv thaiv qee cov dej-soluble tshuaj los ntawm kev noj cov nyhuv ntxov ntxov;
Nws kuj tseem tuaj yeem siv los ua cov tshuaj tua kab mob, stabilizer, thiab cov dej khaws cia hauv ntau hom tshuaj siv tshuaj los tiv thaiv kev ya raws thiab kev puas tsuaj ntawm cov tshuaj thiab txhim kho kev nyab xeeb ntawm cov ntsiav tshuaj.
Lub sij hawm xa tuaj: Plaub Hlis-28-2024