Diphenylmethane diisocyanate → Adipic Acid

Participants

Reaction Conditions

Reaction Steps

0.5 g of dibutyltin dilaurate was added to a 60% strength by weight solution of 106.1 g of toluylene diisocyanate and 150.0 g of diphenylmethane 4,4'-diisocyanate in tetrahydrofuran, and the mixture was then heated to 60° C. At this temperature, a 60% strength by weight solution of 500 g of a polyesterol obtained from 1,4-butanediol and adipic acid and having a molecular weight of 1000, 2.68 g of trimethylolpropane and 55.5 g of hexanediol in tetrahydrofuran was metered in over 2 hours. After the end of the addition, the reaction mixture was stirred at 60° C. until an NCO content of 1.05% by weight was reached.

Provenance & Evidence