反应详情

5.6 g PA-18 (0.02 equivalents as maleic anhydride, hereinafter "anhydride equivalents") and 100 ml xylene were mixed in a 250 ml flask equipped with a nitrogen atmosphere and a Dean Stark trap. This mixture was refluxed for 30 minutes to dry the polymer. The mixture was cooled slightly and Flame Retardant A (of Example 1) (5.1 g, 0.01 mole) was added. The mixture was refluxed for 2 hours with azeotropic removal of water as it formed. The solvent was stripped using aspirator and high vacuum systems to yield 10.4 g of yellow crystals. The infrared spectrum of this compound showed the N-(acylamino)imide carbonyl bands merged at 1710 cm-1 and a small residual anhydride carbonyl band at 1770 cm-1. The hydrazide carbonyl for the starting material was not observed in the product spectrum.

1. customequipped with a nitrogen atmosphere
2. temperatureThis mixture was refluxed for 30 minutes
3. customto dry the polymer
4. temperatureThe mixture was cooled slightly
5. temperatureFlame Retardant A (of Example 1) (5.1 g, 0.01 mole)
6. additionwas added
7. temperatureThe mixture was refluxed for 2 hours with azeotropic removal of water as it
8. customformed