Reaktion #73690

Reaktionsgleichung

maleic anhydride

sulfuric acid

toluene

diethanolamine

iodine

→

diphenylmethane diisocyanate

Reaktionsbedingungen

Aufarbeitung

1. 1
   workup.STIRRINGThe mixture was stirred for 22 hours at a temperature between about 180° F. and about 225° F
2. 2
   workup.STIRRINGwith stirring
3. 3
   TemperaturThe mixture was refluxed for 6 hours
4. 4
   workup.DISTILLATIONdistilling trap
5. 5
   workup.DISTILLATIONdistilled out of solvent
6. 6
   Sonstigeto give a liquid soybean oil

Vorschrift

The above amounts of diethanolamine and iodine were added to the above amount of soybean oil with stirring. The mixture was stirred for 22 hours at a temperature between about 180° F. and about 225° F. Then, the above amounts of maleic anhydride, toluene and sulfuric acid were added with stirring. The mixture was refluxed for 6 hours using a Dean-Stark distilling trap, then distilled out of solvent to give a liquid soybean oil based polyol with a hydroxyl number of 50. A reaction mixture of about 10.00 grams of the polyol and the above indicated amount of diphenylmethane diisocyanate yielded a solid soybean oil based polyurethane material.

Quelle