Dukansu TDI da MDI wani nau'i ne na albarkatun kasa a cikin samar da polyurethane, kuma suna iya maye gurbin juna zuwa wani matsayi, amma babu ƙananan bambance-bambance tsakanin TDI da MDI dangane da tsari, aiki da kuma amfani da yanki.

1. Abubuwan da ke cikin isocyanate na TDI ya fi na MDI girma, kuma yawan kumfa a kowace naúrar ya fi girma.Cikakken sunan TDI shine toluene diisocyanate, wanda ke da ƙungiyoyin isocyanate guda biyu akan zoben benzene ɗaya, kuma abun ciki na ƙungiyar isocyanate shine 48.3%;cikakken sunan MDI shine diphenylmethane diisocyanate, wanda ke da zoben benzene guda biyu kuma abun ciki na ƙungiyar isocyanate shine 33.6%;Gabaɗaya, mafi girman abun ciki na isocyanate, mafi girman ƙarar kumfa na naúrar, don haka idan aka kwatanta da biyun, ƙarar kumfa na rukunin TDI ya fi girma.

2. MDI ba shi da guba, yayin da TDI yana da guba sosai.MDI tana da ƙarancin tururi, ba shi da sauƙi don canzawa, ba shi da wari mai ban haushi, kuma ba shi da guba ga mutane, kuma ba shi da buƙatu na musamman don sufuri;TDI yana da matsananciyar tururi, yana da sauƙin canzawa, kuma yana da ƙaƙƙarfan wari.Akwai tsauraran bukatu.

3. Saurin tsufa na tsarin MDI yana da sauri.Idan aka kwatanta da TDI, tsarin MDI yana da saurin warkarwa da sauri, gajeren zagayowar gyare-gyare da kuma kyakkyawan aikin kumfa.Misali, kumfa mai tushen TDI gabaɗaya yana buƙatar tsarin warkarwa na 12-24h don cimma mafi kyawun aiki, yayin da tsarin MDI kawai yana buƙatar 1h don cimma mafi kyawun aiki.95% girma.

4. MDI yana da sauƙi don haɓaka samfuran kumfa iri-iri tare da ƙarancin dangi.Ta hanyar canza yawan abubuwan da aka gyara, zai iya samar da samfurori tare da nau'i mai yawa na taurin.

5. A ƙasa na polymerized MDI ne yafi amfani da samar da m kumfa, wanda aka yi amfani da gina makamashi ceto,firijiinjin daskarewa, da sauransu. Ginin gine-gine na duniya yana da kimanin kashi 35% na yawan amfani da MDI na polymerized, kuma firiji da injin daskarewa yana da kimanin kashi 20% na amfani da MDI na polymerized;MDI mai tsabta ana amfani dashi don samar da ɓangaren litattafan almara,takalma tafin kafa,elastomers, da sauransu, kuma ana amfani dashi a cikin fata na roba, yin takalma, motoci, da dai sauransu;yayin da ƙasa na TDI galibi ana amfani dashi a cikin kumfa mai laushi.An kiyasta cewa kusan kashi 80% na TDI na duniya ana amfani da su don samar da kumfa mai laushi, wanda ake amfani da shi a cikin Furniture, motoci da sauran fannoni.