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SULFONATED BLOCK COPOLYMERS HAVING ACRYLIC ESTERAND METHACRYLIC ESTER INTERIOR BLOCKS, AND VARIOUS USES FOR SUCH BLOCKS, AND VARIOUS USES FOR SUCH BLOCK COPOLYMERS
SULFONATED BLOCK COPOLYMERS HAVING ACRYLIC ESTERAND METHACRYLIC ESTER INTERIOR BLOCKS, AND VARIOUS USES FOR SUCH BLOCKS, AND VARIOUS USES FOR SUCH BLOCK COPOLYMERS
A sulfonated block copolymer which is solid and non-dispersible in water having at least two polymer end blocks A and at least one interior block B wherein each A block is a polymer block resistant to sulfonation and each B block is a polymer block susceptible to sulfonation, wherein the A and B blocks do not contain any significant levels of olefinic unsaturation. Each A block having one or more segments selected from (i) acrylic esters, (ii) methacrylic esters, and (viii) mixtures thereof; and each B block comprising segments of one or more polymerized vinyl aromatic monomers selected from (i) unsubstituted styrene monomers, (ii) ortho-substituted styrene monomers, (iii) meta-substituted styrene monomers, (iv) alpha-methylstyrene, (v) 1,1-diphenylethylene, (vi) 1,2-diphenylethylene and (vii) mixtures thereof.
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