Nitrogen → HCID 131715824, compound

Participants

Reaction Steps

Into a 4-necked, 1-liter flask fitted with a mechanical thermometer, N2 ebulator, and steam jacketed column packed with Berl Saddles and topped with a Dean-Stark trap and condenser are charged dimethyl terephthalate (220 grams, 1.14 moles), BHDP (300 grams, 1.36 moles) and dibutyltin oxide (1.4 grams). The mixture is heated at 180°-190° C. for 5.5 hours. A conversion of 94 percent is effected based upon methanol distilled overhead. The solid yellow glass (viscosity 40,000 cp at 220° F.) has an average molecular weight of 2,060, an acid member of 1.2, and a hydroxyl number of 51.3.

Provenance & Evidence