Dissocyanates, diisocyanate mixtures and a process for their pro

Details Dissocyanates, diisocyanate mixtures and a process for their pro Dissocyanates, diisocyanate mixtures and a process for their pro

1985-11-12

1988-11-22

Siegel, Alan

Organic compounds -- part of the class 532-570 series

Organic compounds

Isocyanate esters

528 44, 528 48, 528 49, 528 55, 528 58, 528 59, 528 60, 528 76, 528 77, 528 85, C07C 7100, C08G 1810

Patent

active

047867515

ABSTRACT:
Diisocyanates and isomeric mixtures of diisocyanates corresponding to the formula ##STR1## in which R.sub.1, R.sub.2, R.sub.3, m and n are as defined herein are made by phosgenating diamines corresponding to the formula ##STR2## in which R.sub.1, R.sub.2, R.sub.3, m and n are as defined herein at a temperature of from -20.degree. to 250.degree. C. These diisocyanates are particularly useful as starting materials for the production of polyurethanes by the isocyanate polyaddition process.

REFERENCES:
patent: 3663514 (1972-05-01), Campbell et al.

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