| 配方类型： |
RUBBER, PLASTICS, WAXES |
| 配方说明： |
Polyester E |
| 配方组成： |
Phthalic Anhydride/741 g
Diethylene Glycol/1167 g
Maleic Anhydride/490 g |
| 配制方法： |
Charge the glycol. 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. Let the temperature rise to 150'C in 2 hours, and then to 195'C during the following 2 hours. Increase about 15'C per hour until the temperature is 230'C where it is maintained until the acid number is about 70. Increase to 245'C and hold until the acid number is less than 50. Cool and add an inhibitor. |
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