| | Isocyanate isocyanate is the general term for all kinds of esters, -NCO group, if the number of categories, including single-isocyanate R-N = C = O and di-isocyanate O = C = N-R-N = C = O and more Isocyanate, and so on
At present, the most widely used is the largest production : toluene diisocyanate ( Toluene Diisocyanate, referred to as TDI) ; diphenylmethane diisocyanate ( Methylenediphenyl Diisocyanate, referred to as MDI) .
Toluene diisocyanate ( TDI) is a colorless strong sharp taste of the liquid, its boiling point is 251 ° C, the proportion of 1.22, the case of black light on the skin, eyes have a strong stimulating effect and can cause eczema and asthma, with the main In polyurethane foam, paint, synthetic rubber, insulation paint, adhesives and so on. According to their constituents, toluene diisocyanate is a nitrogen-based organic compounds.
Diphenylmethane diisocyanate ( MDI) into pure MDI and crude MDI. MDI pure white solid at room temperature, heating time to time to stimulate smell, the boiling point of 196 ° C, for the hard polyurethane foam, synthetic fiber, synthetic rubber, synthetic leather, adhesives, and so on. According to the ingredients, pure diphenylmethane diisocyanate is also the base of nitrogen-containing organic compounds. | | |
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