Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From ketone or ketene reactant
Reexamination Certificate
2006-01-10
2006-01-10
Troung, Duc (Department: 1711)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From ketone or ketene reactant
C528S125000, C528S175000, C528S226000, C525S391000, C525S471000
Reexamination Certificate
active
06984713
ABSTRACT:
The invention relates to a sulfonated polyetherketonketone (sPEKK), which is amorphous and/or which can be obtained by sulfonating amorphous PEKK. This sPEKK can be preferably produced by using a diphenyl ether and a benzenedicarboxylic acid derivate. Particularly preferred is the use of benzenedicarboxylic acid dichloride. The benzenedicarboxylic acid derivative is advantageously provided in the form of a mixture consisting of at least two different benzenedicarboxylic acid derivatives, in particular, an isophthalic acid derivative and a terephthalic acid derivative.
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FuMa-Tech Gesellschaft fur funktionelle Membranen und Anlagentec
Harkins Tanya E.
Nath Gary M.
Nath & Associates PLLC
Troung Duc
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