Acetone → Maleic Anhydride Methyl Vinyl Ether N,N'-1,3-Phenylenedimaleimide

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A 2-liter stainless steel high pressure reactor was charged with 513.88 g of acetone and 0.201 g of N,N′-1,3-phenylenedimaleimide. The reactor was sealed and purged three times with nitrogen gas ending with a head pressure of 25 psi N2. Then the temperature was raised to 70° C. during a 40 min period. When the temperature reached 60° C., 111.88 ml of molten maleic anhydride was introduced. At 80° C., separate feeds of 175.35 ml of methyl vinyl ether and 1.17 g of decanoyl peroxide in 33 g of acetone were introduced into the reactor over a period of 3 hours, with the methyl vinyl ether feed begun 10 min. before the decanoyl peroxide-acetone solution. After the feed was completed, the reactor was maintained at 80° C. for an additional half-hour. The reactor was then cooled to provide a thick, viscous light amber colored solution of the desired copolymer product in acetone.

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