Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1997-07-21
1998-09-08
Acquah, Samuel A.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
528210, 528214, 528215, 528373, 528401, 528422, 525178, 525179, 525420, 525421, 525422, 525426, 525534, 525540, 524800, 524801, 524837, 524838, 524841, 252500, C08F 216, C08F28300, C08G 7300
Patent
active
058046496
ABSTRACT:
The present invention discloses a water-soluble self-acid-doped polyaniline, and its sodium salt, which can be cast into free-standing films from their aqueous solutions. A process for preparing a water-soluble self-acid-doped polyaniline is also disclosed, which comprises reacting a polyaniline with a strong base to convert the amino nitrogen thereof to anionic nitrogen; reacting sultone with the anionic nitrogen to form a side chain alkanesulfonic acid group; doping with protonic acid to form precipitate; dissolving (undoping) the precipitate in an alkaline aqueous solution; removing excess alkali from the alkaline aqueous solution; and contacting the resulting aqueous solution with a H.sup.+ -type ion exchange resin. Moreover, an aqueous solution of the present water-soluble self-acid-doped PAn can be easily mixed with an additional water soluble polymer or polymer emulsion, which can then be cased into a polymer blend film having improved mechanical properties and coupling strength to a substrate.
REFERENCES:
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patent: 4957833 (1990-09-01), Daifuku et al.
patent: 4999263 (1991-03-01), Kabata et al.
patent: 5066556 (1991-11-01), Toyosawa et al.
patent: 5232631 (1993-08-01), Cao et al.
Chen Show-An
Hwang Gue-Wuu
Acquah Samuel A.
Liauh W. Wayne
National Science Council
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