Propylene Glycol → HCID 86751390, compound

Participants

Reaction Conditions

Reaction Steps

A three-liter reactor equipped as in Example 2 is charged with maleic anhydride (690 g) and succinic anhydride (230 g). The mixture is heated to 75° C. to melt the maleic anhydride, and propylene glycol (353 g) is added. The exothermic reaction is maintained at or below 130° C. for two hours. A 3000 mol. wt. polyoxypropylene triol (1027 g) and p-toluenesulfonic acid (2.3 g) are added. The mixture is heated at 190° C. until the acid number falls to 112 mg KOH/g. Propylene glycol (146 g) is added, and heating continues until the acid number is 38 mg KOH/g. After cooling, 2077 g (86.8% yield) of resin is collected. GPC results: Mn=1982, Mw=10,730. A blend of the resin with 40% styrerie has APHA color=65.

Provenance & Evidence