Global Patent Index - EP 1029329 A1

EP 1029329 A1 2000-08-23 - CONDUCTIVE POLYMER COMPOSITIONS

Title (en)

CONDUCTIVE POLYMER COMPOSITIONS

Title (de)

LEITFÄHIGE POLYMERZUSAMMENSETZUNGEN

Title (fr)

COMPOSITIONS POLYMERES CONDUCTRICES

Publication

EP 1029329 A1 (EN)

Application

EP 98950224 A

Priority

  • GB 9803241 W
  • GB 9723464 A
  • GB 9801159 A

Abstract (en)

[origin: WO9924991A1] A fluid conductive polymer mixture for use in the preparation of coatings, films and fibres is based on a polyaniline in base form (preferably emeraldine-base form). This is doped with a sulfonic acid having in addition to at least one sulfonic acid group a second hydrogen-bonding functional group and is dispersed in an acid solvent having a pKa less than 4.5 but substantially higher (more positive) than that of the sulfonic acid. The functional sulfonic acid appears to act as a solvating agent, as well as dopant, and allows the formation of high-solids mixtures in the acid solvents (up to around 15 % w/v compared with a maximum of about 10 % in conventional NMP-based mixtures) from which solvent can be extracted with a competing solvent (e.g. in a wet-spinning process); cold- (and hot-) drawable films and fibres can be obtained. Preferred sulfonic acid is 2-acrylamido-2-methyl-1-propanesulfonic acid (AMPSA) or its oligomer and preferred acid solvent dichloroacetic acid. The competing solvent may be acetone, methyl isobutyl ketone or butyl acetate.

IPC 1-7 (main, further and additional classification)

H01B 1/12

IPC 8 full level (invention and additional information)

C08L 79/00 (2006.01); C09D 5/24 (2006.01); C09D 179/00 (2006.01); H01B 1/12 (2006.01); H01B 13/00 (2006.01)

CPC (invention and additional information)

H01B 1/128 (2013.01)

Citation (search report)

See references of WO 9924991A1

Designated contracting state (EPC)

BE DE ES FI FR GB IE IT NL SE

EPO simple patent family

WO 9924991 A1 19990520; AU 9637798 A 19990531; CA 2309194 A1 19990520; EP 1029329 A1 20000823; JP 2001522898 A 20011120

INPADOC legal status


2007-06-08 [REG HK WD] APPLICATIONS WITHDRAWN, DEEMED TO BE WITHDRAWN, OR REFUSED AFTER PUBLICATION IN HONG KONG

- Document: HK 1028479

2003-11-05 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20030502

2000-08-23 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20000429

2000-08-23 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): BE DE ES FI FR GB IE IT NL SE