Low-temperature storage stable liquid diphenylmethane...

Details Low-temperature storage stable liquid diphenylmethane... Low-temperature storage stable liquid diphenylmethane...

C - Chemistry, Metallurgy

08

G

260/455.4, 260/4

C08G 18/10 (2006.01) C08G 18/76 (2006.01) C08G 18/80 (2006.01)

Patent

CA 1091683

LOW-TEMPERATURE STORAGE STABLE LIQUID DIPHENYLMETHANE DIISOCYANATES ABSTRACT OF THE DISCLOSURE The instant invention is directed to novel low temperature, storage stable liquid diphenylmethane diisocy- anates and to the method of their preparation. The diisocy- anates of the instant invention are produced by reacting diphenylmethane diisocyanates having a specified 2,4'- isomer content with propylene glycol or poly-1,2-propylene ether glycols. It has been surprisingly found that the products of the instant invention are both stable and liquid at -5°C for at least 48 hours. In fact, in many instances, the products of the instant invention show no tendency to crystallize even when stored at -22°C for weeks.

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