Thoob Ntiaj Teb - Premier TDI: Lub Tsev Thaiv Tseem Ceeb hauv Kev Lag Luam Polyurethane
Cov Khoom Siv Lub Cev thiab Tshuaj
Qhov tsos thiab ntxhiab tsw: Feem ntau TDI yog ib yam kua uas tsis muaj xim pob tshab los yog daj me ntsis, uas yooj yim hlawv. Nws muaj ntxhiab tsw qab, muaj zog, thiab ua rau khaus khaus, uas yog ib qho cim qhia tias nws muaj nyob hauv.
Kev yaj thiab kev ua haujlwm: Nws tuaj yeem sib xyaw nrog ntau yam organic solvents xws li ethanol (nrog decomposition), diethylene glycol monoethyl ether, diethyl ether, acetone, carbon tetrachloride, benzene, chlorobenzene, kerosene, thiab roj txiv roj. Ib qho ntawm nws cov yam ntxwv tshuaj lom neeg tshaj plaws yog nws cov tshuaj tiv thaiv nrog dej, ib qho tshuaj tiv thaiv uas tsim cov pa roj carbon dioxide. Tsis tas li ntawd, TDI tuaj yeem ua rau cov tshuaj tiv thaiv sai sai nrog cov tshuaj uas muaj cov hydrogen atoms nquag, ib qho khoom uas tau siv hauv ntau cov txheej txheem kev lag luam.
Cov Qauv Tseem Ceeb ntawm Lub Cev: TDI muaj lub ntsiab lus kub ntawm ib puag ncig 247 ℃, uas txiav txim siab qhov kub uas nws hloov pauv los ntawm cov kua mus rau lub xeev roj hauv qab lub siab ib txwm muaj. Nws lub ntsiab lus yaj yog txij li 19.5 txog 21.5 ℃, qhia txog qhov kub hauv qab uas nws khov. Lub ntsiab lus flash ntawm TDI yog 127 ℃, txhais tau tias ntawm qhov kub no, nws tuaj yeem tsim cov pa roj uas yooj yim hlawv thaum muaj qhov chaw hluav taws xob. Nrog rau qhov ceev ntawm 1.217, nws yog denser dua li dej, uas muaj feem cuam tshuam rau nws txoj kev tuav thiab kev sib cais hauv kev lag luam thiab ib puag ncig.
Cov Cheeb Tsam Thov
Kev Tsim Khoom Ua Npuas Ncauj Polyurethane: TDI yog lub hauv paus tseem ceeb hauv kev tsim cov polyurethane ua npuas ncauj, uas siv dav hauv ntau yam lag luam. Hauv kev lag luam rooj tog, cov polyurethane ua npuas ncauj mos mos ua nrog TDI yog cov khoom siv xaiv rau kev tsim cov ncoo xis nyob thiab txhawb nqa hauv cov rooj zaum, cov rooj zaum, thiab cov txaj pw. Hauv kev lag luam tsheb, cov npuas ncauj no yog siv rau hauv cov rooj zaum hauv tsheb, muab kev nplij siab thiab kev nyab xeeb los ntawm kev nqus cov kev poob siab thaum tsav tsheb. Tsis tas li ntawd, TDI - raws li polyurethane ua npuas ncauj yog siv rau hauv cov ntawv thov rwb thaiv tsev, xws li hauv cov tub yees thiab cov ntaub ntawv rwb thaiv tsev, vim lawv cov khoom rwb thaiv tsev zoo heev.
Cov Tshuaj Pleev Xim thiab Cov Nplaum: TDI ua lub luag haujlwm tseem ceeb hauv kev tsim cov txheej txheem ua haujlwm siab thiab cov nplaum. Hauv kev lag luam txheej txheem, TDI - raws li polyurethanes yog siv los tsim cov txheej txheem ruaj khov, khawb - tiv taus, thiab tshuaj lom neeg tiv taus rau ntau yam substrates, suav nrog cov hlau, yas, thiab ntoo. Cov txheej txheem no yog siv rau hauv kev ua tiav tsheb, txheej txheem pem teb, thiab txheej txheem khoom siv hauv kev lag luam. Hauv kev lag luam nplaum, TDI - cov nplaum muaj txiaj ntsig rau lawv lub peev xwm sib txuas zoo. Lawv yog siv rau hauv kev sib dhos ntawm rooj tog, kev sib txuas ntawm cov khoom siv tsheb, thiab hauv kev lag luam kev tsim kho rau kev koom ua ke ntau yam khoom siv hauv tsev.
Kev Tsim Khoom Elastomer: TDI yog siv los tsim cov polyurethane elastomers, uas muab cov khoom ntawm roj hmab thiab yas sib xyaw ua ke. Cov elastomers no pom cov ntawv thov hauv ntau qhov chaw, xws li hauv kev tsim cov khau hauv qab, qhov twg lawv muab kev ywj pheej zoo heev, kev ruaj khov, thiab kev poob siab. Lawv kuj siv rau hauv kev tsim cov foob thiab gaskets hauv kev lag luam, qhov twg lawv tiv taus cov tshuaj lom neeg, kev puas tsuaj, thiab qhov kub siab ua rau lawv tsim nyog rau kev siv hauv cov chaw ib puag ncig hnyav.
Cov Txheej Txheem Npaj
Cov Kev Phosgenation Ib Txwm Muaj
Txoj Kev 2,4 - Amino Toluene: Cov txheej txheem pib nrog kev yaj 2,4 - amino toluene thiab yaj nws hauv chlorobenzene. Cov tshuaj no ces reacted nrog phosgene hauv ob kauj ruam. Ua ntej, qhov kub qis tshwm sim hauv qhov kub ntawm 35 - 45 ℃. Tom qab ntawd, qhov kub siab tshwm sim ntawm qhov kub qis dua 130 ℃. Tom qab cov tshuaj tiv thaiv tiav lawm, cov pa nitrogen raug qhia kom tshem tawm cov hydrogen chloride thiab phosgene ntau dhau. Cov chlorobenzene ces distilled tawm, thiab kauj ruam kawg cuam tshuam nrog kev distillation nqus tsev kom tau txais TDI ntshiab.
Txoj Kev Nitro Toluene: Hauv txoj kev no, nitro toluene raug nitrated ua ntej thiab tom qab ntawd txo kom tau 2,4 - diaminotoluene. Cov khoom nruab nrab no ces raug phosgenation, qhov twg nws reacts nrog phosgene los tsim TDI. Cov tshuaj sib tov ces raug ua kom sib cais thiab ntxuav cov khoom TDI.
Cov Txheej Txheem Lwm Yam Tshiab
Cov Kev Uas Tsis Yog Phosgene: Nyob rau xyoo tas los no, muaj kev tsom mus rau kev tsim cov txheej txheem tsis yog phosgene los tsim TDI hauv kev siv zog los txo qhov cuam tshuam rau ib puag ncig uas cuam tshuam nrog kev siv phosgene. Piv txwv li, qee qhov kev tshawb fawb tab tom tshawb nrhiav kev siv lwm cov tshuaj reagents thiab cov xwm txheej tshuaj tiv thaiv los tsim TDI yam tsis tas yuav siv phosgene. Txawm li cas los xij, cov txheej txheem no tseem nyob rau theem kev loj hlob thiab tseem tsis tau ua tiav kev siv dav dav.
Cov kev ceev faj
Kev phom sij rau kev noj qab haus huv: Cov pa TDI ua rau muaj kev pheej hmoo loj rau tib neeg txoj kev noj qab haus huv. Nws ua rau khaus qhov muag, tawv nqaij, thiab txoj hlab pa. Kev raug ntev lossis rov ua dua tuaj yeem ua rau muaj teeb meem kev noj qab haus huv hnyav, suav nrog cov teeb meem ua pa xws li mob ntsws ntsws, mob ntsws zoo li mob ntsws, thiab qee zaum, txawm tias muaj cov mob hnyav dua xws li mob ntsws ntsws thiab mob plawv ntsws. Piv txwv li, cov nas uas raug rau qhov ntau ntawm (0.5 - 1) × 10⁻⁶ rau 6 teev hauv ib hnub, tshaj 5 - 10 hnub, tau pom tias yuav ua rau muaj kev phom sij. Hauv tib neeg, kev ua pa ntawm qhov ntau tsawg li 0.0005mg / L tuaj yeem ua rau hnoos hnyav thiab ua pa luv luv.
Kev Pheej Hmoo ntawm Kev Kub Hnyiab thiab Kev Tawg: TDI yog cov kua uas yooj yim hlawv, thiab nws cov pa tuaj yeem ua rau muaj kev sib xyaw ua ke nrog huab cua. Thaum raug rau cov nplaim taws qhib, cov hluav taws xob, lossis cua sov siab, muaj kev pheej hmoo loj ntawm kev kub hnyiab thiab tawg. Yog li ntawd, cov txheej txheem khaws cia thiab tuav kom zoo yog qhov tseem ceeb kom tiv thaiv cov kev phom sij no.
Kev Khaws Cia thiab Kev Siv: TDI yuav tsum khaws cia rau hauv qhov chaw txias, muaj cua nkag tau zoo uas nyob deb ntawm tshav ntuj ncaj qha, qhov chaw kub, thiab qhov chaw hluav taws xob. Cov thawv cia khoom yuav tsum kaw kom nruj kom tiv thaiv kev xau dej. Vim nws ua rau muaj kev cuam tshuam nrog dej thiab lwm yam tshuaj, nws yuav tsum khaws cia cais ntawm cov ntaub ntawv uas yuav ua rau muaj kev cuam tshuam nrog nws, xws li cov neeg sawv cev oxidizing. Thaum lub sijhawm tuav, cov khoom siv tiv thaiv tus kheej tsim nyog, suav nrog cov hnab looj tes tiv thaiv tshuaj lom neeg, cov tsom iav kev nyab xeeb, thiab kev tiv thaiv kev ua pa, yuav tsum hnav kom txo qis kev pheej hmoo ntawm kev raug tshuaj.
Cov Lus Qhia Tshwj Xeeb
| Lub Npe Khoom | Toluene Diisocyanate | |||||||||
| Cov Qauv Tshuaj | C9H6N2O2 | |||||||||
| Qhov Hnyav Molecular | 174.16 g/mol | |||||||||
| Qhov tsos | Tsis muaj xim rau lub teeb daj pob tshab kua | |||||||||
| Qhov Kub Yaj | 19.5–21.5°C | |||||||||
| Kub Kub | 247°C | |||||||||
| Qhov Ceev | 1.22 g/cm³ | |||||||||
| CAS TSIS MUAJ | 584-84-9 | |||||||||
| Tus lej HS | 29291010 | |||||||||
| EINECS TSIS MUAJ | 209-544-5 | |||||||||
| Daim Ntawv Thov | Siv rau polyurethane ua npuas ncauj, elastomers, coatings, adhesives. | |||||||||
Daim Ntawv Tswj Xyuas Zoo
| Lub Npe Khoom | Toluene Diisocyanate | ||||||
| COV KEV CAI | TUS QAUV | Cov txiaj ntsig ntawm kev xeem | |||||
| Cov ntsiab lus ntawm Toluene Diisocyanate% ≧ | 99.5 | 99.96 | |||||
| Qhov sib piv ntawm isomer (2,4 / 2,6) | 80.0/20.0±1 | 79.4/20.6 | |||||
| Hydrolysis chlorine% ≤ | 0.01 | 0.0032 | |||||
| Acidity (raws li HCL)% ≤ | 0.004 | 0.0005 | |||||
| Chroma (Hazen) ≤ | 25 | 10 | |||||