Phthalic Anhydride/22 g Diethylene Glycol/584 g Adipic Acid/219 g Maleic Anhydride/686 g Ethylene Glycol/341 g
配制方法:
Charge the glycols. Start the agitator and introduce a slow stream of inert gas. Heat to about 80'C and add the maleic anhydride, followed by the phthalic anhydride and the adipic acid. Raise the temperature to 150'C in 1 hour and then about 10'C per hour until the temperature has reached 210'C. Keep at 210'C until the acid number is less than 60. Apply a vacuum of 100 to 200 mm and let the temperature fall to about 180'C. End the vacuum treatment when the acid number is below 40. Cool and add an inhibitor.
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