SULFONATED BLOCK COPOLYMERS, METHOD FOR MAKING SAME, AND VARIOUS USES FOR SUCH BLOCK COPOLYMERS
First Claim
1. A pre-cursor block copolymer for sulfonation which, prior to hydrogenation, has the general configuration A-B-A, A-B-A-B-A, (A-B-A)nX, (A-B)nX, A-D-B-D-A, A-B-D-B-A, (A-D-B)nX, (A-B-D)nX or mixtures thereof, where n is an integer from 2 to about 30, and X is a coupling agent residue and wherein:
- a. each A block is a polymer block resistant to sulfonation, each D block is a polymer block resistant to sulfonation, and each B block is a polymer block susceptible to sulfonation, said A, D and B blocks containing no significant levels of olefinic unsaturation;
b. each A block independently having a number average molecular weight between 1,000 and 60,000, each D block independently having a number average molecular weight between 1,000 and 50,000, and each B block independently having a number average molecular weight between 10,000 and 300,000;
c. each A block is a segment of one or more polymerized para-substituted styrene monomers;
d. each B block comprises segments of one or more vinyl aromatic monomers selected from polymerized (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;
e. each D block comprises polymers having a glass transition temperature less than 20°
C. and a number average molecular weight of between 1000 and 50,000, said D block being selected from the group consisting of (i) a polymerized or copolymerized conjugated diene selected from isoprene, 1,3-butadiene having a vinyl content prior to hydrogenation of between 20 and 80 mol percent, (ii) a polymerized acrylate monomer, (iii) silicone polymer, (iv) polymerized isobutylene and (v) mixtures thereof, wherein any segments containing polymerized 1,3-butadiene or isoprene are subsequently hydrogenated; and
f. the mol percent of vinyl aromatic monomers which are unsubstituted styrene monomers, ortho-substituted styrene monomers, meta-substituted styrene monomers, alpha-methylstyrene, 1,1-diphenylethylene and 1,2-diphenylethylene in each B block is between 10 mol percent and 100 mol percent.
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Accused Products
Abstract
A pre-cursor block copolymer for sulfonation which, prior to hydrogenation, has the general configuration A-B-A, A-B-A-B-A, (A-B-A)nX, (A-B)nX, A-D-B-D-A, A-B-D-B-A, (A-D-B)nX, (A-B-D)nX or mixtures thereof, wherein A, B and D blocks do not contain any significant levels of olefinic unsaturation. Each A and D block is a polymer block resistant to sulfonation, and each B block is a polymer block susceptible to sulfonation. Each A block is a segment of one or more polymerized para-substituted styrene monomers, each B block contains segments of one or more vinyl aromatic monomers selected from polymerized (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, and each D block contains polymers having a glass transition temperature less than 20° C. and a number average molecular weight of between 1,000 and 50,000
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Citations
7 Claims
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1. A pre-cursor block copolymer for sulfonation which, prior to hydrogenation, has the general configuration A-B-A, A-B-A-B-A, (A-B-A)nX, (A-B)nX, A-D-B-D-A, A-B-D-B-A, (A-D-B)nX, (A-B-D)nX or mixtures thereof, where n is an integer from 2 to about 30, and X is a coupling agent residue and wherein:
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a. each A block is a polymer block resistant to sulfonation, each D block is a polymer block resistant to sulfonation, and each B block is a polymer block susceptible to sulfonation, said A, D and B blocks containing no significant levels of olefinic unsaturation; b. each A block independently having a number average molecular weight between 1,000 and 60,000, each D block independently having a number average molecular weight between 1,000 and 50,000, and each B block independently having a number average molecular weight between 10,000 and 300,000; c. each A block is a segment of one or more polymerized para-substituted styrene monomers; d. each B block comprises segments of one or more vinyl aromatic monomers selected from polymerized (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; e. each D block comprises polymers having a glass transition temperature less than 20°
C. and a number average molecular weight of between 1000 and 50,000, said D block being selected from the group consisting of (i) a polymerized or copolymerized conjugated diene selected from isoprene, 1,3-butadiene having a vinyl content prior to hydrogenation of between 20 and 80 mol percent, (ii) a polymerized acrylate monomer, (iii) silicone polymer, (iv) polymerized isobutylene and (v) mixtures thereof, wherein any segments containing polymerized 1,3-butadiene or isoprene are subsequently hydrogenated; andf. the mol percent of vinyl aromatic monomers which are unsubstituted styrene monomers, ortho-substituted styrene monomers, meta-substituted styrene monomers, alpha-methylstyrene, 1,1-diphenylethylene and 1,2-diphenylethylene in each B block is between 10 mol percent and 100 mol percent. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification