Patent ID: 9169358
Filing Date: 2015-10-27
Classification: C07C,C07D,C08G,C08L,Y10T

Abstract:
1. A method for the manufacture of a bis(halophthalimide) composition from a combination of a 4-halophthalic anhydride isomer of the formula and a 3-halophthalic anhydride isomer of the formula wherein X is a halogen, in a ratio of the 4-halophthalic anhydride to 3-halophthalic anhydride of 90:10 to 10:90, and wherein one of the isomers is a first isomer and the other is a second isomer, the method comprising wherein R is selected from an aromatic hydrocarbon group having 6 to 30 carbon atoms, a halogenated derivative thereof, a straight or branched chain alkylene group having 2 to 10 carbon atoms, a cycloalkylene group having 3 to 20 carbon atoms, or a divalent group of the formula wherein Q wherein X and R are as defined above.