Patent ID: 6429282
Filing Date: 2002-08-06
Classification: C08G,C08J,D01F,H01B

Abstract:
A method for preparing solutions having between 15% and 40% by weight of (Mw)&gE;120,000, (Mn)&gE;30,000 emeraldine base form of polyaniline, which comprises the steps of:a. mixing a solvent for polyaniline with a mixture of a primary amine and a secondary amine such that the molar ratio of the primary amine and secondary amine to polyaniline tetramer repeat unit is between 0.1 and 5.0, forming thereby a solution; and b. dissolving polyaniline having (Mw)&gE;120,000 and (Mn)&gE;30,000 in the solution thus prepared, whereby a solution is formed which is stable over a chosen time period.