Реакция #1121742

Уравнение реакции

ethylene oxide

bisphenol A

propylene oxide

bisphenol A

terephthalic acid

dibutyltin oxide

→

Polyester

Styrene-Acrylic Acid

Условия реакции

Обработка

1. 1
   ДругоеIn a reaction vessel equipped with a condenser, a stirrer and a nitrogen inlet tube
2. 2
   ДругоеThe mixture was subjected to a reaction for 8 hours at 230° C. under normal pressure
3. 3
   Другоеsubsequently reacted for 5 hours under a reduced pressure of from 10 mmHg to 15 mmHg

Методика

In a reaction vessel equipped with a condenser, a stirrer and a nitrogen inlet tube, 682 parts of ethylene oxide 2 mol adduct of bisphenol A, 81 parts of propylene oxide 2 mol adduct of bisphenol A, 283 parts of terephthalic acid, 22 parts of trimellitic anhydride, and 2 parts of dibutyltin oxide were added. The mixture was subjected to a reaction for 8 hours at 230° C. under normal pressure, and subsequently reacted for 5 hours under a reduced pressure of from 10 mmHg to 15 mmHg. Thus [Intermediate Polyester 1] was obtained. The [Intermediate Polyester 1] was found to have a number average molecular weight of 2,100, a mass average molecular weight of 9,500, a glass transition temperature (Tg) of 55° C., an acid value of 0.5 mgKOH/g and a hydroxyl value of 51 mgKOH/g.

Источник