Diisocyanate (DDI) wani nau'in diisocyanate ne na musamman na aliphatic diisocyanate mai kashin baya na carbon atom dimer 36. Tsarin yana ba DDI sassauci da mannewa mafi kyau fiye da sauran isocyanates na aliphatic. DDI yana da kaddarorin ƙarancin guba, babu rawaya, yana narkewa a cikin yawancin abubuwan narkewar halitta, ƙarancin ruwa da ƙarancin ɗanko. DDI nau'i ne na ayyuka biyu na Isocyanate, yana iya aiki tare da mahaɗan hydrogen guda biyu ko fiye don yin polymer. Ana iya amfani da DDI a cikin roka mai ƙarfi, kammala masaka, takarda, maganin fata da masaka, maganin kiyaye itace, tukunyar lantarki da shirya kaddarorin musamman na polyurethane (urea), manne da rufewa, da sauransu.

A masana'antar masaku, DDI tana da kyakkyawan damar amfani da ita a cikin abubuwan da ke hana ruwa da laushi ga masaku. Ba ta da saurin kamuwa da ruwa kamar isocyanates masu ƙamshi kuma ana iya amfani da ita don shirya emulsions masu ƙarfi a cikin ruwa.

Amfani da 0.125%DDI yana ba wa yadin laushi mai ɗorewa; Yadin da aka yi wa magani da cationic masu laushi marasa ɗorewa suna da irin wannan sassauci bayan an wanke su sau 26. Maganin hana ruwa na yadi ta amfani da 1%DDI yana da irin wannan ko mafi kyawun tasirin hana ruwa kamar maganin hana ruwa na fat pyridine (gwajin AATCC).

DDI na iya inganta tasirin hana ruwa da kuma hana mai ga masaku masu fluoride. Idan aka yi amfani da shi a hade, DDI na iya inganta halayen hana ruwa da kuma hana mai na masaku sosai.

Binciken dakin gwaje-gwaje da na filin sun nuna cewa DDI tana da juriya ga wankewa da busasshen ruwa fiye da sinadarin fluoride ko ƙarin kayan masaku kamar magungunan hana sata.

DDI, wanda aka samar daga dimer fatty acids, nau'in isocyanate ne na yau da kullun, wanda za a iya sabunta shi ta hanyar bio-renewable. Idan aka kwatanta da isocyanate na duniya baki ɗaya TDI, MDI, HDI da IPDI, DDI ba shi da guba kuma ba ya haifar da amo. Tare da shaharar kayan albarkatun dimeric acid a China da kuma karuwar hankalin mutane ga ƙarancin tattalin arzikin kare muhalli da ci gaba mai ɗorewa, mahimmancin amfani da kayan albarkatun da za a iya sabunta su don shirya DDI ya bayyana a hankali, wanda ke da muhimmiyar mahimmanci wajen haɓaka ci gaban masana'antar polyurethane.