Toluene 2,4-Diisocyanate → Formaldehyde

Participants

Reaction Steps

40.9 parts by weight of an isocyanate mixture of which 40% by weight consists of a tolylene diisocyanate mixture (2,4- and 2,6-isomers in a ratio by weight of 65:35%) and 60% by weight of a polyphenyl polymethylene polyisocyanate (viscosity approximately 200 cP at 25° C.). The polyphenyl polymethylene polyisocyanate was obtained by condensing aniline with formaldehyde, followed by phosgenation.

Provenance & Evidence