Licensable Technologies : Materials : Nanotechnology

Stable, Concentrated Solutions of Polyaniline Using Amines as Gel Inhibitors

Abstract
The Subject Invention relates to stable, concentrated solutions of high-molecular weight polyaniline using amines as gel inhibitors. Certain amine compounds (gel inhibitors) are used to form highly concentrated, stable solutions of the emeraldine base form of polyaniline in numerous organic solvents from which coatings, films and fibers are readily prepared without problems associated with rapid gelation which occurs when concentrated solutions are attempted without the use of the gel inhibitors of the present invention. Tertiary amines are used to solubilize low-molecular weight fractions (Mw ? 120,000, Mn- ? 30,000) of the pernigraniline, emeraldine, and leucoemeraldine oxidation states of polyaniline as concentrated (>20 wt.%) polyaniline solutions, while primary and secondary amines are used to produce solutions having 15-40 wt% of high-molecular weight polyaniline [Mw ? 120,000, Mn- ? 30,000]. Concentrated solutions of polyaniline co-polymers or ring and/or nitrogen-substituted polyanilines may also be prepared.

IP Status: Available both Exclusively and Non Exclusively

Reference Number: 251

S Number: DOE reference no.(s): 84,977; 87,288; 87,290; 87,291; 94,691

Patents & Applications:
European Patent Convention Patent Cooperation Treaty Patent Number 1008148B1 Issued on 05/21/2003 United States National Patent Number 6429282 Issued on 08/06/2002 Australia Patent Cooperation Treaty Patent Number 728111 Issued on 04/19/2001 United States National Patent Number 6123883 Issued on 09/26/2000 United States National Patent Number 6099907 Issued on 08/08/2000 United States National Patent Number 5981695 Issued on 11/09/1999

Posted: 09-28-2004

Contact
John Mott
Technology Transfer Division
Los Alamos National Laboratory
P.O. Box 1663, MailStop C334
(505) 665-0883
jmott@lanl.gov