POLYMERIC SURFACTANT
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United States of America Patent
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app pub date -
Jul 1, 2014
filing date -
Jul 22, 2013
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Abstract
Surfactant compositions including sulfonated polyester polyethers, and methods of making such compositions, are described. A diol is reacted with an anhydride having residual unsaturation, and the resulting polymer is sulfonated under mild acid-base conditions. Sulfonation occurs at the residual unsaturation. If maleic anhydride is used, sulfonation occurs at locations alpha to carbonyl carbons in the polymer.
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