Nrog rau qhov kev thov kom muaj cov khoom siv zoo, zoo rau ib puag ncig thiab ua tau zoo hauv cov khoom siv tshiab xws li polyurethane thiab epoxy resin,dimethylthio-toluene diamine(DMTDA, CAS tus lej: 106264-79-3) tau maj mam dhau los ua lub zog tseem ceeb rau kev txhim kho kev lag luam vim nws cov yam ntxwv tshwj xeeb ntawm cov khoom thiab cov xwm txheej siv dav. Raws li hom tshiab ntawm cov tshuaj tua kab mob aromatic diamine thiab cov saw hlau txuas ntxiv, DMTDA maj mam hloov cov tshuaj tua kab mob ib txwm muaj. Dimethyl thio-toluene diamine tau siv rau ntau qhov chaw xws li tsheb, kev tsim kho, saw hlau txias, thiab tiv thaiv xeb, txhawb kev lag luam kom hloov mus rau qhov qis-carbon, kev ua haujlwm siab thiab kev txhim kho siab.
Cov yam ntxwv ntawm dimethyl thio-toluene diamine (DMTDA)
Cov txiaj ntsig tseem ceeb ntawmDimethylthio-toluene diamine (DMTDA)Nws yog los ntawm nws lub cev nqaij daim tawv uas nyob hauv lub xeev kua ntawm chav tsev kub thiab nws cov tshuaj lom neeg ua haujlwm zoo heev. Piv nrog rau cov khoom siv kho kom zoo nkauj MOCA, cov khoom no tuaj yeem siv ncaj qha yam tsis muaj cua sov. Qhov no tsis tsuas yog txo qhov kev siv hluav taws xob thiab kev ua haujlwm nyuaj hauv cov txheej txheem ntau lawm, tab sis kuj tuaj yeem hloov kho rau cov xwm txheej tsim kho qis-kub, daws tau cov teeb meem kev lag luam xws li kev siv cov khoom siv kho kom zoo nkauj thaum lub caij ntuj no thiab kev tsim kho tsis yooj yim.
Cov ntaub ntawv qhia tau hais tias qhov ua haujlwm ntawm DMTDA yog 3.7 npaug ntawm MOCA. Nws tuaj yeem tsim cov qauv urea nruj nrog isocyanates sai sai, txhim kho lub zog tensile thiab lub zog tsim kua muag ntawm cov khoom elastomer los ntawm 20% -30%. Ntawm qhov kub thiab txias -40 degrees Celsius, nws tseem tswj tau qhov elasticity zoo heev thiab nws cov kev ua haujlwm hydrolysis tau txhim kho los ntawm 30% piv rau MOCA, ua rau nws haum rau cov xwm txheej hnyav xws li av noo thiab qhov kub qis.
Daim ntawv thov ntawm dimethyl thio-toluene diamine (DMTDA)
Hauv kev ua cov polyurethane elastomers, DMTDA tau dhau los ua cov khoom siv tseem ceeb rau kev tsim cov khoom lag luam siab. Nws yog siv dav hauv cov txheej txheem xws li casting polyurethane elastomers, tshuaj tiv thaiv kev txhaj tshuaj (RIM), thiab txau polyurea (SPUA), thiab tuaj yeem siv los tsim cov khoom xws li cov roj hmab dov siab, cov casters kev lag luam, cov yeeb nkab roj, thiab cov khoom siv nqus dej hauv tsheb. Vim nws lub zog zoo heev thiab kev tiv thaiv roj, kev tiv thaiv kev laus, dimethyl thio-toluene diamine (DMTDA) ua tau raws li cov kev cai nruj ntawm kev tsim khoom siv tshuab thiab kev lag luam tsheb rau kev ruaj khov ntawm cov khoom. Tshwj xeeb tshaj yog hauv kev thauj mus los ntawm cov saw hlau txias, cov foob thiab cov ntaub qhwv nqus dej uas tau npaj nrog DMTDA tuaj yeem hloov kho rau qhov chaw kub qis heev, muab kev lees paub rau kev ua haujlwm ruaj khov ntawm cov tsheb saw hlau txias thiab cov khoom siv tub yees, thiab dhau los ua kev txhawb nqa tseem ceeb rau kev txhim kho cov khoom siv thauj khoom txias.
Kev tsim vaj tsev thiab kev tiv thaiv kev xeb yog lwm qhov xwm txheej tseem ceeb ntawm kev sivDMTDA. Raws li tus neeg sawv cev epoxy resin curing, dimethyl thio-toluene diamine tuaj yeem siv los npaj cov txheej txheem tiv thaiv xeb thiab cov txheej txheem tiv thaiv hluav taws kub, uas tau siv dav hauv kev tiv thaiv xeb ntawm cov kav dej hlau sab hauv phab ntsa, kev kho hluav taws kub ntawm cov ru tsev thiab phab ntsa sab, thiab lwm yam. Cov txheej txheem kho tau muaj kev sib txuas zoo heev, kev tiv thaiv tshuaj lom neeg thiab kev ruaj khov ntawm cov qauv, uas tuaj yeem ua kom lub neej ua haujlwm ntawm cov khoom siv tau ntev. Hauv cov xwm txheej uas muaj kev xeb hnyav xws li kev tsim kho dej hiav txwv thiab cov khoom siv tsuas, DMTDA-based coatings tuaj yeem tiv taus kev yaig los ntawm dej hiav txwv, acidic thiab alkaline media, txo cov nqi kho khoom siv, thiab pab txhim kho cov thev naus laus zis hauv thaj chaw ntawm kev tiv thaiv xeb siab.
Cov kev cia siab ntawm kev loj hlob ntawm dimethyl thio-toluene diamine (CAS 106264 79 3)
Kev ua raws li ib puag ncig thiab lub peev xwm ua lag luam tau ua kom cov txheej txheem hloov pauv ntawm dimethyl thio-toluene diamine sai dua. Nrog rau cov cheeb tsam xws li EU siv cov kev txwv rau kev siv cov tshuaj lom neeg kho khoom zoo li MOCA, DMTDA amine uas tsis muaj tshuaj lom thiab zoo rau ib puag ncig tau dhau los ua lwm txoj hauv kev nyiam hauv kev lag luam. Nws tsis yog tsuas yog ua raws li cov cai tiv thaiv ib puag ncig thoob ntiaj teb xwb tab sis kuj txo cov plua plav paug thaum lub sijhawm tsim khoom thiab txhim kho kev nyab xeeb ntawm kev ua haujlwm hauv chaw ua haujlwm. Los ntawm qhov kev xav ntawm kev ua lag luam, qhov loj me ntawm kev ua lag luam thoob ntiaj teb ntawm DMTDA thiab cov khoom zoo sib xws tau txog 2.873 billion yuan hauv xyoo 2024. Nws xav tias yuav loj hlob ntawm tus nqi loj hlob txhua xyoo ntawm 17.06% txij li xyoo 2025 txog 2030. Ntawm lawv, daim teb casting polyurethane elastomer yog qhov xwm txheej thov loj tshaj plaws, thiab kev loj hlob ntawm kev thov los ntawm kev tsim khoom siab tau dhau los ua lub zog tseem ceeb rau kev nthuav dav kev ua lag luam.
Cov kws tshaj lij hauv kev lag luam tau hais tias kev siv loj ntawmDMTDA ethacure 300tsis yog tsuas yog txhawb nqa cov khoom lag luam hauv kev lag luam kho kom zoo xwb, tab sis kuj pab cov lag luam downstream kom txo tau tus nqi, txhim kho kev ua haujlwm zoo, thiab kev txhim kho siab. Yav tom ntej, nrog rau kev ua tiav tas mus li hauv cov thev naus laus zis tshiab, daim ntawv thov DMTDA amine hauv aerospace, cov khoom siv kho mob, thiab cov nplaum siab thiab lwm yam teb yuav nthuav dav ntxiv. Tib lub sijhawm, cov khoom DMTDA uas muaj kev ntshiab siab (≥99%) thiab cov khoom siv DMTDA uas hloov kho raws li tus neeg yuav dhau los ua qhov tseem ceeb ntawm kev sib tw ua lag luam thiab coj kev lag luam mus rau qhov kev coj ua zoo dua thiab ua tau zoo dua. Unilong Industry, los ntawm kev tsim kho tshiab thiab kev nthuav dav peev xwm, maj mam txhim kho nws lub suab hauv kev lag luam DMTDA thoob ntiaj teb thiab muab kev txhawb nqa tseem ceeb rau kev ywj pheej thiab kev tswj hwm ntawm cov saw hlau kev lag luam.
Lub sijhawm tshaj tawm: Lub Ib Hlis-23-2026