Qhov sib txawv ntawm polyurethane catalysts tdi thiab mdi
TDI thiab MDI yog ob qho tseem ceeb polyurethane catalyst cov ntaub ntawv, thiab lawv muaj qhov sib txawv ntawm cov qauv tshuaj, kev ua tau zoo thiab siv.
Tdi (toluene diisocyanate)Yog ib feem siv polyurethane raw khoom, tsuas yog siv hauv npuas dej mos, elastomer, txheej thiab lwm thaj teb. Cov qauv tshuaj ntawm TDI ua rau nws muaj cov kab mob ntxim nyiam thiab tuaj yeem hnov mob nrog polyols los ua polyurethane. Txawm li cas los xij, TDI muaj qee qhov tsis zoo nyob hauv kev tsim khoom thiab siv cov txheej txheem, xws li yellaum, tso cov roj lom thiab yooj yim ntawm qhov kub siab.
Kev ua tau zoo sib txawv:Polyurethane ua los ntawm TDI muaj elasticity zoo thiab softness, thiab yog haum rau kev ua npuas ncauj mos, elastomer thiab lwm yam khoom. Vim nws cov siab reactivity, TDI yog me ntsis tsis txaus ntseeg ua kom muaj zog thiab muaj zog polyurethane khoom.
Nqi:Tus nqi ntawm TDI raw cov ntaub ntawv yog qhov tsis tshua muaj, thiab tus nqi ntawm kev ua polyurethane siv TDI yog tsawg.
Piv nrog TDI, MDI (diphenylmethane di ncauj diisocyanate) muaj cov reactivity siab dua thiab cov cua sov zoo dua. Polyurethane ua los ntawm MDI muaj lub zog siab dua, tawv thiab hnav tsis kam, thiab yog qhov tsim nyog rau kev ua npuas dej nyuaj, Elastive thiab lwm yam khoom. Txawm li cas los xij, MDI tseem muaj qee qhov tsis zoo hauv kev tsim khoom thiab siv cov txheej txheem, xws li cov roj cryrystall yooj yim thiab tso roj lom.
Kev ua tau zoo sib txawv:Polyurethane ua los ntawm MDI muaj lub zog siab dua, tawv thiab hnav tsis kam, thiab yog qhov tsim nyog rau ua npuas, Elastomer thiab lwm yam khoom lag luam. Piv nrog TDI, polyurethane ua los ntawm MDI muaj tshav kub tsis kam thiab ntau dua kev cuam tshuam.
Nqi:Tus nqi ntawm MDI raw cov ntaub ntawv yog qhov tseem ceeb, yog li tus nqi ntawm kev siv MDI los ua polyurethane yog tus siab.
Hauv cov ntsiab lus, TDI, MDI thiab muaj qhov sib txawv ntawm cov qauv tshuaj, kev ua tau zoo thiab siv. Ntawm lawv, Tdi muaj zoo dua elasticity thiab softness, thiab yog haum rau kev ua npuas ncauj muag, elastomer thiab lwm yam khoom; MDI muaj lub zog siab dua, Hardness thiab hnav tsis kam, Elastomer thiab lwm yam khoom lag luam, thiab yuav tsum tau txiav txim siab ua tiav raws li cov khoom lag luam.