Chaw Tsim Khoom Zoo Tus Nqi Triphenylmethane peb isocyanate (ethyl acetate kua) CAS: 141-78-6 Hom: Desmodur_RE

1. Ethyl acetate yog siv los ua cov kuab tshuaj rau cov varnishes, lacquers, thiab nitrocellulose; ua cov txiv hmab txiv ntoo cuav tsw; hauv kev ntxuav cov ntaub; thiab hauv kev tsim cov ntaub txhob lo lo ntxhuav thiab tawv, tshuaj tsw qab, thiab cov yeeb yaj kiab duab thiab cov phaj (Merck 1996). Ethyl Acetate feem ntau yog siv los ua cov kuab tshuaj hauv cov tshuaj tiv thaiv organic. Cov kuab tshuaj ib puag ncig; Cov kuab tshuaj zaub mov.

2. Ethyl acetate feem ntau yog siv ua cov kuab tshuaj thiab cov tshuaj diluent, vim nws pheej yig, tsis muaj tshuaj lom, thiab tsw qab zoo. Piv txwv li, nws feem ntau siv los ntxuav cov laug cam thiab hauv qee cov tshuaj ntxuav tes (acetone thiab acetonitrile kuj siv). Cov taum kas fes thiab nplooj tshuaj yej raug tshem tawm nrog cov kuab tshuaj no. Nws kuj tseem siv rau hauv cov xim ua tus ua kom muaj zog lossis ua kom tawv. [Yuav tsum muaj lus hais] Ethyl acetate muaj nyob rau hauv cov khoom qab zib, tshuaj tsw qab, thiab txiv hmab txiv ntoo. Hauv cov tshuaj tsw qab, nws ua pa sai sai, tsuas yog tso cov ntxhiab tsw ntawm cov tshuaj tsw qab rau ntawm daim tawv nqaij.
3 – 1 - Kev siv hauv chav kuaj mob
Hauv chav kuaj mob, cov khoom sib xyaw uas muaj ethyl acetate feem ntau siv rau hauv cov txheej txheem chromatography thiab kev rho tawm. Ethyl acetate tsis tshua raug xaiv los ua cov tshuaj tiv thaiv vim nws yooj yim rau hydrolysis thiab trans esterification.
3 – 2 - Qhov tshwm sim hauv cov cawv txiv hmab
Ethyl acetate yog cov ester feem ntau hauv cov cawv txiv hmab, yog cov khoom ntawm cov organic acid uas feem ntau volatile - acetic acid, thiab ethyl alcohol tsim tawm thaum lub sijhawm fermentation. Lub aroma ntawm ethyl acetate yog qhov ci ntsa iab tshaj plaws hauv cov cawv txiv hmab hluas thiab pab txhawb rau kev pom dav dav ntawm "txiv hmab txiv ntoo" hauv cov cawv txiv hmab.
3 – 3 - Tus neeg tua kab mob
Hauv kev tshawb nrhiav kab, ethyl acetate yog ib yam tshuaj uas ua rau lub cev tsis ua haujlwm zoo rau kev sau thiab kawm txog kab. Hauv lub thawv tua kab uas muaj ethyl acetate, cov pa yuav tua cov kab uas tau sau (feem ntau yog cov kab laus) sai sai yam tsis ua rau nws puas tsuaj. Vim tias nws tsis hygroscopic, ethyl acetate kuj tseem ua rau cov kab mos txaus kom tso cai rau kev teeb tsa kom haum rau kev sau.

3. Cov tshuaj pab (tshuaj tsw qab); cov txiv hmab txiv ntoo cuav; cov kuab tshuaj rau nitrocellulose, varnishes, lacquers, thiab cov tshuaj pleev dav hlau; kev tsim cov hmoov tsis muaj pa luam yeeb, tawv cuav, cov yeeb yaj kiab thiab cov phaj duab, cov ntaub txhob lo lo ntxhuav cuav, tshuaj tsw qab; cov ntaub ntxuav, thiab lwm yam.