Patent ID: 6548622
Filing Date: 2003-04-15
Classification: C08G

Abstract:
A process for the production of polysulfones, comprising, contacting an aromatic compound which is bireactive selected from the group consisting of naphthalene, methylnaphthalene, methoxynaphthalene, benzyl ether, stilbene, diphenyl carbonate, benzyl phenyl ether, biphenyl, wherein R1 is â€”Oâ€” or alkylidene, and R3 is hydrocarbylene, substituted hydrocarbylene or hydrocarbylidene,a carboxylic acid anhydride; and at least one sulfonyl containing species selected from the group consisting of surfuric acid, sulfur trioxide and a mixture of surfuric acid, and sulfur trioxide, wherein the molar ratio of the aromatic compound to the total sulfonyl containing species is 1:1, and wherein the reaction temperature range is 0Â° C. to 300Â° C.