Daim ntawv thov:

Toluene diisocyanates feem ntau yog siv los tsim cov polyurethane ua npuas ncauj hloov tau siv rau hauv rooj tog zaum, txaj, thiab tsheb thiab cov rooj zaum dav hlau. Lwm yam, kev siv me me yog siv rau polyurethane elastomers (rau tsheb bumper npog, kev lag luam chais, kev ua si nawv thiab khau boots, thiab cov khoom siv tshuab) thiab coatings (rau tsheb refinishing, ntoo finishes, thiab high-performance anti-corrosion coatings) (ICIS 2009). Toluene diisocyanate-raws li txhav polyurethane ua npuas ncauj yog siv nyob rau hauv tsev tub yees thiab rau cov tsev nyob sheathing los yog ua lag luam ru tsev nyob rau hauv board los yog laminate daim ntawv (IARC 1986). "Pour-inplace" lossis "spray-in" rigid foam yog siv los ua rwb thaiv tsev rau cov tsheb thauj khoom, tsheb thauj mus los, thiab cov thawv ntim khoom. Polyurethane-hloov alkyds muaj kwv yees li 6% mus rau 7% isocyanate, feem ntau toluene diisocyanates, thiab siv los ua cov ntaub ntawv txheej, xws li hauv pem teb tiav, ntoo tiav, thiab xim. Cov txheej txheej ntub dej yog siv los ua ntoo thiab pob zeb sealants thiab hauv pem teb tiav. Lub dav hlau, tsheb, thiab cov neeg caij tsheb txheej txheej feem ntau yog tsim los ntawm toluene diisocyanate prepolymer systems. Castable urethane elastomers yog siv rau hauv cov ntawv thov kom muaj zog, yoog raws, thiab kev poob siab, thiab tiv taus roj, hnyav, thiab hluav taws xob ultraviolet. Lawv yog siv nyob rau hauv cov nplaum thiab sealant compounds thiab nyob rau hauv lub tsheb qhov chaw, khau soles, rollerskate log, pas dej ua ke, thiab cov hnab ntshav. Lawv kuj tau siv inoil teb thiab mines. Qee cov khoom elastomer yog tsim los ntawm cov ntshiab 2,4 isomer es tsis yog 80:20 sib tov.

Cov pab pawg ua haujlwm hauv TDI hnov ​​​​mob nrog hydroxyl pawg los tsim cov urethane linkages, uas yog siv los tsim cov polyurethane flexible foams siv rau hauv rooj tog, txaj, thiab tsheb thauj mus los thiab kev lag luam zaum. Lwm yam kev siv muaj xws li polyurethane elastomers siv rau hauv lub tsheb bumper npog, muaj chais, cov khau ncaws pob, nrog rau cov khoom siv kho tshuab thiab cov txheej txheem (hlau, ntoo, thiab cov coatings anticorrosion siab). TDI-raws li nruj polyurethane ua npuas ncauj yog siv nyob rau hauv tsev tub yees thiab siv nyob rau hauv tsev xws li sheathing thiab coj mus muag ru tsev. TDI spray-in rigid foam yog siv los ua rwb thaiv tsev rau cov tsheb thauj khoom, tsheb ciav hlau thauj khoom, thiab cov thawv ntim khoom txawv teb chaws. Moisture-curing TDI coatings yog siv los ua ntoo thiab pob zeb sealants thiab hauv pem teb tiav.