Jump to: navigation, s Methylene diphenyl diisocyanate, most often abbreviated as MDI, is an aromatic diisocyanate. It exists in three isomers, 2,2'-MDI, 2,4'-MDI, and 4,4'-MDI. The 4,4' isomer is most practically useful, and is also known as Pure MDI. MDI is reacted with a polyol in the manufacture of polyurethane. It is the most produced diisocyanate, accounting for 61.3% of the global market in the year 2000.[1] earch
{| ! style="background: rgb(248, 234, 186) none repeat scroll 0% 50%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial" colspan="2" | 4,4'-methylene diphenyl diisocyanate |} IUPAC name 1-isocyanato-4-
[(4-isocyanatophenyl)methyl]
benzene Other names Pure MDI
4,4'-methylene diphenyl
diisocyanate
4,4'-diphenylmethane
diisocyanate {| ! style="background: rgb(248, 234, 186) none repeat scroll 0% 50%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial" colspan="2" | Identifiers |} CAS number 101-68-8 RTECS number NQ9350000 SMILES O=C=NC(C=C2)=CC=C2C
C1=CC=C(N=C=O)C=C1 {| ! style="background: rgb(248, 234, 186) none repeat scroll 0% 50%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial" colspan="2" | Properties |} Molecular formula C15H10N2O2 Molar mass 250.25 g/mol Appearance white or pale yellow solid Density 1.230 g/cm3, solid Melting point 40 °C (313 K) Boiling point 314 °C (587 K) Solubility in water Reacts {| ! style="background: rgb(248, 234, 186) none repeat scroll 0% 50%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial" colspan="2" | Hazards |} EU classification Harmful (Xn) R-phrases R20, R36/37/38, R42/43 S-phrases (S1/2), S23, S36/37, S45 Flash point 212-214 °C (Cleveland open cup) {| ! style="background: rgb(248, 234, 186) none repeat scroll 0% 50%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial" colspan="2" | Related Compounds |} Related Isocyanates Toluene diisocyanate
Naphthalene diisocyanate Related compounds Polyurethane Except where noted otherwise, data are given for
materials in their standard state
(at 25 °C, 100 kPa)
Infobox disclaimer and references Methylene diphenyl diisocyanate, most often abbreviated as MDI, is an aromatic diisocyanate. It exists in three isomers, 2,2'-MDI, 2,4'-MDI, and 4,4'-MDI. The 4,4' isomer is most practically useful, and is also known as Pure MDI. MDI is reacted with a polyol in the manufacture of polyurethane. It is the most produced diisocyanate, accounting for 61.3% of the global market in the year 2000.[1]
Diphenylmethane
Diphenylmethane is a liquid over 22 oC.
Diphenylmethane is a liquid over 22 oC.
Methylene diphenyl diisocyanate, often abbreviated as MDI, is known as an aromatic diisocyanate.
Yes
Yes. Two isomers of toluene are known as toluene-2,4-diisocyanate and toluene-2,6-diisocyanate
3909.50.1000
yes u can
If you think to diphenylmethane this compound is a solid under 25 oC.
Howard E. Momberg has written: 'A comparison of two methods for the determination of toluene diisocyanate in air' -- subject(s): Toluene 2,4-Diisocyanate, Analysis
It is pronounced as "dye-uh-so-sigh-uhn-ate."
Most foam is made from polyurethane.They start by making polyurethane. To make it, you mix a polyol with a diisocyanate. There are many polyols. There are two important isocyanates, toluene diisocyanate and methylene diisocyanate. (Two other diisocyanates are used to make urethane paint.) The choice of polyol governs whether the foam is hard or soft, and how soft or hard it is.Next, you mix in a blowing agent. The first blowing agent was water, which forms CO2 in contact with diisocyanate. They don't like making insulating foam with water, because the foam doesn't insulate as well.