Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Reexamination Certificate
2006-07-20
2010-06-15
Jagannathan, Vasu (Department: 1796)
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, C526S287000
Reexamination Certificate
active
07737224
ABSTRACT:
The present invention is a, solid block copolymer comprising at least two polymer end blocks A and at least one polymer 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, and wherein said A and B blocks do not contain any significant levels of olefinic unsaturation. Preferably, each A block comprising 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; 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. Also claimed are processes for making such block copolymers, and the various end uses and applications for such block copolymers.
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Jongok Won, et al, Fixation of Nanosized Proton Transport Channels in Membranes, Macromolecules 2003, 36, Jan. 5, 2003, pp. 3228-3234.
Ken Norberg, DuPont Developing New Protective Suits for Military, First Responders, International FiberJournal, Aprill 2005.
Handlin, Jr. Dale Lee
Mather Brian Douglas
Trenor Scott Russell
Willis Carl Lesley
Boyle Robert C
Jagannathan Vasu
Kraton Polymers U.S. LLC
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