Diisocyanates, diisocyanate mixtures and a process for their...

Details Diisocyanates, diisocyanate mixtures and a process for their... Diisocyanates, diisocyanate mixtures and a process for their...

C - Chemistry, Metallurgy

08

G

402/131, 260/455

C08G 18/76 (2006.01) C08G 18/74 (2006.01)

Patent

CA 1216857

DIISOCYANATES, DIISOCYANATE MIXTURES AND A PROCESS FOR THEIR PRODUCTION ABSTRACT OF THE DISCLOSURE Diisocyanates and isomeric mixtures of diisocyanates corresponding to the formula Image in which Rl, R2, R3, m and n are as defined herein are made by phosgenating diamines corresponding to the formula Image in which Rl, R2, R3, m and n are as defined herein at a temperature of from -20 to 250°C. These diiso- cyanates are particularly useful as starting materials for the production of polyurethanes by the isocyanate polyaddition process.

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