PEDOT dispersions in organic solvents
View Patent ↗Described is a complex comprising a polythiophene and a sulphonated synthetic rubber. Also described is a process for producing complexes, the complexes obtained by this process, a composition, a layer structure, a process for producing the layer structure, the layer structure obtained by this process, electronic components, and the use of a composition.
1. A complex comprising
a polythiophene and
a sulphonated synthetic rubber, wherein the sulphonated synthetic rubber is a sulphonated synthetic rubber derived from hydrogenated, optionally partially alkyl-substituted styrene-diene block copolymers.
2. The complex of claim 1 , wherein the sulphonated synthetic rubber is a sulphonated synthetic rubber derived from hydrogenated, optionally partially alkyl-substituted styrene-butadiene or styrene-isoprene block copolymers.
3. The complex of claim 1 , wherein the sulphonated synthetic rubber is a sulphonated synthetic rubber derived from hydrogenated, optionally partially alkyl-substituted styrene-isoprene block copolymers.
4. The complex of claim 1 , wherein the sulphonated synthetic rubber is a sulphonated styrene-butadiene copolymer, in which at least a portion of the styrene units or at least a portion of the butadiene units or at least a portion of the styrene units and at least a portion of the butadiene units in the copolymer are sulphonated.
5. The complex of claim 4 , wherein the functionalized styrene-butadiene copolymer is obtained by sulphonation of a styrene-butadiene copolymer.
6. The complex of claim 5 , wherein the styrene-butadiene copolymer is a block copolymer.
7. The complex of claim 1 , wherein the ion-exchange capacity of the sulphonated synthetic rubber is between 0.01 and 5 meq/g.
8. The complex of claim 1 , wherein the sulphonated synthetic rubber has a weight-average molecular weight (M w ) determined by gel permeation chromatography in the range of from 1000 to 10,000,000 g/mol.
9. The complex of claim 1 , wherein the polythiophene is a poly(3,4-ethylenedioxythiophene).
10. The complex of claim 1 , wherein the complex is obtained by a process in which the thiophene monomer is oxidatively polymerized in the presence of the sulphonated synthetic rubber.
11. A process for producing complexes comprising
a polythiophene and
a sulphonated synthetic rubber,
the process comprising, oxidatively polymerizing the thiophene monomer in the presence of the sulphonated synthetic rubber, wherein the sulphonated synthetic rubber is a sulphonated synthetic rubber derived from hydrogenated, optionally partially alkyl-substituted styrene-diene block copolymers.
12. The process of claim 11 , wherein the sulphonated synthetic rubber is a sulphonated synthetic rubber derived from hydrogenated, optionally partially alkyl-substituted styrene-butadiene or styrene-isoprene block copolymers.
13. The process of claim 11 , wherein the sulphonated synthetic rubber is a sulphonated synthetic rubber derived from hydrogenated, optionally partially alkyl-substituted styrene-isoprene block copolymers.
14. The process of claim 11 , wherein the sulphonated synthetic rubber is a sulphonated styrene-butadiene copolymer, in which at least a portion of the styrene units or at least a portion of the butadiene units or at least a portion of the styrene units and at least a portion of the butadiene units in the copolymer are sulphonated.
15. The process of claim 11 , wherein the oxidative polymerization of the thiophene monomer takes place in a water-immiscible organic solvent or a mixture of water-immiscible organic solvents.
16. A complex obtained by the process of claim 11 .
17. A composition comprising a water-immiscible organic solvent and the complex according to claim 1 dissolved or dispersed in the organic solvent.
18. The composition of claim 17 , wherein the composition is obtained by oxidatively polymerizing the thiophene monomer in the presence of the sulphonated synthetic rubber in a water-immiscible organic solvent or a mixture of water-immiscible organic solvents.
19. The composition of claim 17 , wherein the composition comprises less than 1 wt. % of water, relative to the total weight of the composition.
20. A layer structure comprising a substrate and an electrically conductive layer applied to at least a part of the substrate surface, wherein the electrically conductive layer comprises the complex according to claim 1 .
21. A process for producing a layer structure, the process comprising:
I) providing a substrate;
II) applying the composition according to claim 17 to at least a part of the surface of the substrate; and
III) at least partially removing the organic solvent to obtain an electrically conductive layer comprising the complex comprising the polythiophene and the sulphonated synthetic rubber.
22. A layer structure obtained according to claim 21 .
23. The layer structure of claim 20 , wherein the electrically conductive layer has a specific resistance of less than 10,000 Ω·cm.
24. An electronic component comprising a layer structure according to claim 20 .
25. A method of producing an electrically conductive layer in an electronic component or an antistatic coating, the method comprising using the composition of claim 17 as an electrically conductive layer or as an antistatic coating.