Aromatic sulfonated diester monomer, process to synthesize, polymer derived therefrom and method to prepare said polymer
AssigneeThe Dow Chemical Company
InventorsRay E. Drumright, Michael J. Mullins, William B. Marshall, Edvins L. Daiga
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Abstract
A sulfonated dicarboxylic acid and a diaromatic carbonate are reacted by a solution process to form a sulfonated aromatic diester such as dipbenyl sodium 5-sulfoisophthalate. The sulfonated aromatic diester is reacted with an aromatic polymer precursor mixture such as bisphenol A and diphenyl carbonate, polymer or combination thereof, at a temperature above the melting point of the polymer or a member of the aromatic polymer precursor to form a randomly positioned sulfonated aromatic moiety in a polymer chain of a thermoplastic non-crosslinked aromatic polymer such as a linear polycarbonate.
Claims5
A sulfonated aromatic diester represented by the structure:
- ##STR11## wherein R is an aromatic group, each R.sup.2 group is independently an aryl group selected from the group consisting of phenyl, naphthyl, cumenyl, mesityl, tolyl, and xylyl, and M is selected from the group consisting of hydrogen, an alkali metal, an alkaline earth metal, a quaternary nitrogen group, a quaternary phosphorus group and zinc.
Dependencies are inferred from the claim text.