Process for preparing sulfonated block copolymers and...

Details Process for preparing sulfonated block copolymers and... Process for preparing sulfonated block copolymers and...

2011-08-23

2011-08-23

Jagannathan, Vasu (Department: 1764)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C525S313000, C525S314000, C525S315000, C525S316000, C525S291000, C525S330300, C525S330400, C526S287000, C526S319000, C526S328000, C526S328500, C526S329000, C526S329200, C526S329700

Reexamination Certificate

active

08003733

ABSTRACT:
A process for preparing sulfonated block copolymers that are solid in water having at least two polymer end blocks A and at least one polymer interior block B involving sulfonating the interior block B until substantially sulfonated. Each A block having one or more segments selected from polymerized (i) para-substituted styrene monomers, (ii) ethylene, (iii) alpha olefins of 3 to 18 carbon atoms; (iv) hydrogenated 1,3-cyclodiene monomers, (v) hydrogenated monomers of conjugated dienes having a vinyl content less than 35 mol percent prior to hydrogenation, (vi) acrylic esters, (vii) methacrylic esters, and (viii) mixtures thereof. Each B block having 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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