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 112.0 g of toluylene diisocyanate and 158.3 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 390 g of a polyesterol obtained from 1,4-butanediol and adipic acid and having a molecular weight of 1000, 167.5 g of a polyesterol obtained from 1,6-hexanediol, adipic acid and terephthalic acid, 29.4 g of polydimethylsiloxane having hydroxyl functional groups and a molecular weight of 900, 3.17 g of trimethylolpropane, 3.13 g of methyldiethanolamine, 72 g of diethoxylated bisphenol A and 27 g of 1,6-hexanediol in tetrahydrofuran was metered in over 2 hours.

Provenance & Evidence