Method for producing a sulfonated block copolymer composition
AssigneeKraton Polymers U.S. LLC
InventorCARL LESLEY WILLIS
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Abstract
Sulfonated block copolymer composition formed by dissolving in an aprotic polar solvent 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.
Claims33
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, and
- wherein 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.
A sulfonated block copolymer composition formed by the process comprising:
- dissolving in an aprotic polar solvent a 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,
- wherein the sulfonated block copolymer in said solvent 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.
A method for forming a sulfonated block copolymer composition comprising:
- dissolving in an aprotic polar solvent a non-inverted 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,
- wherein the sulfonated block copolymer in said solvent 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 the said micelle structure.
A sulfonated block copolymer composition comprising:
- 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 and having an ion exchange capacity of 1.5 meq/g or less,
- and wherein said block copolymer has an inverted cup moisture transmission rate greater than about 20 liters/m2/day.
An electrodialytic cell comprising:
- at least one anode and at least one cathode,
- 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 and having an ion exchange capacity of 2.5 meq/g or less,
- and wherein said block copolymer has a conductivity of at least 1.0 mS/cm.
Dependencies are inferred from the claim text.