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water insoluble sulfonated block copolymer, process for preparing water insoluble sulfonated block copolymers, article, selective permeable membrane, method for varying the transport properties of a polymer film casting, and, composition
water insoluble sulfonated block copolymer, process for preparing water insoluble sulfonated block copolymers, article, selective permeable membrane, method for varying the transport properties of a polymer film casting, and, composition
WATER-INSOLUBLE SULFONATED BLOCK COPOLYMER, PROCESS FOR PREPARING WATER-INSOLUBLE SULFONATED BLOCK, ARTICLE, SELECTIVE PERMEABLE MEMBRANE, METHOD TO VARIATE THE PROPERTY OF TRANSMISSION OF ONE-FILM AND COMPLETE TRANSMISSION PROPERTIES The present invention relates to a solid block copolymer comprising at least two final polymer A blocks and at least one polymer B inner block wherein each A block is a sulfonation resistant polymer block and each B block is a sulfonation block. sulfonation-susceptible polymer, and wherein blocks A and B contain no significant level of olefinic unsaturation. Preferably, each block A comprises one or more segments selected from (i) para-substituted styrene monomers, (ii) ethylene, (iii) alpha olefins of 3 to 18 carbon atoms; (iv) hydrogenated 1,3-cyclodiene monomers, (v) hydrogenated diene conjugated monomers with a vinyl content of less than 35 mol percent prior to hydrogenation, (vi) acrylic esters, (vii) methacrylic esters, and (viii) mixtures thereof; and each block B comprises 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 polymerized. Processes for preparing such block copolymers and the various end uses and applications for such block copolymers are also claimed.
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