Methylene diphenyl diisocyanate yog ib qho tshuaj tsw qab diisocyanate. Peb isomers muaj ntau, sib txawv los ntawm txoj haujlwm ntawm pawg isocyanate nyob ib ncig ntawm lub nplhaib: 2, 2′-MDI, 2, 4′-MDI, thiab 4, 4′-MDI. 4, 4′ isomer feem ntau siv, thiab tseem hu ua 4, 4′-diphenylmethane diisocyanate.
MDI tshuaj siv rau dab tsi?
Ntxig foams, qhov hluav taws xob loj tshaj plaws rau MDI, feem ntau yog siv hauv kev tsim kho, tub yees, ntim khoom thiab rwb thaiv tsev. MDI kuj tseem siv los ua cov binders, elastomers, adhesives, sealants, coatings thiab fibers.
MDI puas txaus ntshai?
MDI yog qhov txaus ntshai tshaj plaws ntawm cov isocyanates uas nquag muaj, tab sis tsis zoo. Nws cov vapor siab tsawg heev txo nws cov kev phom sij thaum tuav piv rau lwm cov isocyanates loj (TDI, HDI).
MDI yog dab tsi?
Diphenylmethane diisocyanate (MDI) yog ib tug tswv cuab ntawm tsev neeg diisocyanate txuam nrog polyurethane chemistry. Lub sij hawm polyurethane siv rau ntau cov polymers tsim los ntawm polyaddition ntawm polyfunctional isocyanates thiab isocyanate-reactive polyfunctional compounds.
MDI hauv rwb thaiv tsev yog dab tsi?
Methylene diphenyl diisocyanate, los yog MDI, yog ntau yam molecule uas xa cov khoom sib txawv rau ntau yam kev siv. Qhov kawg siv rau MDI suav nrog: Ua npuas ncauj rwb thaiv tsev rau cov khoom siv thiab kev tsim kho.
