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 1216858

DIISOCYANATES, DIISOCYANATE MIXTURES AND A PROCESS FOR THEIR PRODUCTION ABSTRACT OF THE DISCLOSURE Diisocyanates and isomeric mixtures of diiso- cyanates corresponding to the formula Image in which R1, R2, m and n are as defined herein, are produced by phosgenating diamines corresponding to the formula Image in which R1, R2, m and n are as defined herein, at a temperature of from -20 to 250°C. Minor quanti- ties of unhydrogenated or perhydrogenated diisocyanates may be present in the product diisocyanates or isomeric mixtures of diisocyanates. These diisocyanates and isomeric mixtures of diisocyanates are particularly useful in the production of polyurethanes.

442676

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