Diisocyanates and a process for their preparation

Details Diisocyanates and a process for their preparation Diisocyanates and a process for their preparation

C - Chemistry, Metallurgy

07

C

260/456.1

C07C 263/10 (2006.01)

Patent

CA 1309724

NEW DIISOCYANATES AND A PROCESS FOR THEIR PREPARATION ABSTRACT OF THE DISCLOSURE Alkyl-substituted diisocyanatotoluene(s) is (are) produced by (a) heating diaminotoluene(s) in the presence of an Al/Zn alloy and aluminum chloride until evolution of hydrogen ceases, (b) reacting the diamino- toluene(s) with at least one 1-alkene having 8 to 18 carbon atoms at elevated temperature and pressure and (c) phosgenating the resultant alkyl-substituted diaminotoluene(s). These alkyl-substituted diiso- cyanatotoluenes are liquids having low vapor pressures and are useful in the production of polyurethanes,

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