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Method for producing a sulfonated block copolymer composition

  • US 9,365,662 B2
  • Filed: 10/14/2011
  • Issued: 06/14/2016
  • Est. Priority Date: 10/18/2010
  • Status: Active Grant
First Claim
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1. A solution having an inverted micelle sulfonated block copolymer composition comprising:

  • at least one sulfonated block copolymer having at least one end block A and at least one interior block B wherein each A block contains essentially no sulfonic acid or sulfonate ester functional groups and each B block is a polymer block containing from about 10 to about 100 mol % sulfonic acid or sulfonate ester functional groups based on the number of sulfonation susceptible monomer units of the B block,said sulfonated block copolymer being dissolved in an aprotic polar solvent, andwherein the sulfonated block copolymer is arranged in an inverted micelle structure having the sulfonic acid or sulfonate ester segments of the sulfonated block copolymer on the exterior of said micelle structure and the non-polar segments of the sulfonated block copolymer on the interior of said micelle structure, andwherein the aprotic polar solvent is a compound containing at least one nitrogen atom.

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