Ion exchange fluorocarbon resin membrane

Details Ion exchange fluorocarbon resin membrane Ion exchange fluorocarbon resin membrane

2007-01-09

2007-01-09

Harlan, Robert D. (Department: 1713)

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

Synthetic resins

Ion-exchange polymer or process of preparing

C521S028000, C526S245000, C526S250000, C526S255000

Reexamination Certificate

active

10479036

ABSTRACT:
An ion exchange fluorocarbon resin membrane having a storage modulus (JIS K-7244), when substituted with tributyl ammonium ions, at a temperature of not less than Tc represented by the following general equations (1-1) to (1-3) of 0.8×106Pa or more, and a heat of crystal fusion at 270 to 350° C. of 1 J/g or less:in-line-formulae description="In-line Formulae" end="lead"?Tc(° C.)=55+Tg(EW<750)  (1-1)in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?Tc(° C.)=0.444×EW−278+Tg(750≦EW<930)  (1-2)in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?Tc(° C.)=135+Tg(EW≧930)  (1-3)in-line-formulae description="In-line Formulae" end="tail"?where Tg designates the peak temperature of loss tangent in the dynamic viscoelasticity measure-ment of the ion exchange fluorocarbon resin membrane (having SO3H as the ends of the side chains).

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