Glycerol → Trimellitic anhydride

Participants

Reaction Steps

275 g of a polyester of 1.0 mol of terephthalic acid, 0.38 mol of glycerol and 0.72 mol of glycol having a hydroxyl group content of about 6.0% by weight and catalytic quantities of lead acetate and butyl titanate at 150° C. After a final condensation for from 4 to 6 hours at from 200° to 220° C., 2724 g of a clear, pale reddish brown, brittle, solid resin having a resin content of 90.3% (according to DIN) and a viscosity of 22 070 mPa s as determined in a 50% solution of γ-butyrolactone at 20° C. are obtained.

Provenance & Evidence