| 配方类型： |
RUBBER, PLASTICS, WAXES |
| 配方说明： |
Polyester H |
| 配方组成： |
Ethylene Glycol/372 g
Isopropylidene bis-(p-phenyl-eneoxypropanol-2)/1701 g
Fumaric Acid/1161 g |
| 配制方法： |
Charge the ethylene glycol. Start the agitator and introduce a slow stream of inert gas. Heat to approximately 100'C. Add the isopropylidene bis(p-phenylene-oxypropanol-20, followed by the fumaric acid. Fill the trap with xylene and add a further 175 g (about 5% of total charge).
Increase the temperature to 150'C in about 1 hour and establish reflux.
Raise the temperature at the rate of about 5'C per hour until 190'C has been reached. Maintain 190'C until the acid number is below 50. Empty the trap and apply vacuum to remove the xylene. Maintain the vacuum (100 to 200 mm) until the acid number is about 35. Cool and add an inhibitor. |
|
