C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
402/131, 260/456
C08G 18/75 (2006.01) C07C 119/045 (1985.01)
Patent
CA 1217198
CYCLOALIPHATIC DIISOCYANATES OPTIONALLY IN THE FORM OF ISOMER MIXTURES AND A PROCESS FOR THEIR PRODUCTION ABSTRACT OF THE DISCLOSURE Diisocyanates and isomer mixtures of diisocya- nates corresponding to the formula Image in which R1 and R2 may be the same or different and each repre- sents hydrogen or (optionally branched) C1-C12- (prefer- ably C1-C4-) alkyl groups, particularly methyl groups, with the proviso that at least one of the radicals R1 and R2 represents an alkyl radical, and m and n are each 0 or 1, with the proviso that the sum of m + n is 1 and where m or n = 0, the free valency remaining is saturated by hydrogen, are produced by phosgenating diamines and isomer mixtures of diamines corresponding to the formula Image in which R1, R2, m and n are as already defined. These diisocyanates which are liquid at room temperature and highly compatible with polyols are particularly useful in the production of polyurethanes.
435851
Brockelt Michael
Knofel Hartmut
Penninger Stefan
Stutz Herbert
Aktiengesellschaft Bayer
Marcoux & Sher Swabey Mitchell Houle
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