US5279768A
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Process for the preparation of electrically conductive polymers derived from 3-alkylthiophenes
Assignee: Solvay SA
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Filing: 1990-02-20
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Granted: 1994-01-18
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Expires: 2010-02-20
Abstract
Abstract The invention relates to a process for the preparation of electrically conductive polymers derived from 3-alkylthiophenes by chemical polymerization of the 3-alkylthiophene by means of a ferric salt, an alkyl halide and water. The invention also relates to electrically conductive devices containing the poly(3-alkylthiophenes) obtained and a thermoplastic polymer.
Inventors
- 👤 Elise Destryker
- 👤 Claude Franquinet
- 👤 Etienne Hannecart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:17
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/06; H01B1/12; H01B1/124; H01B1/127; C; C08; C08G; C08G61/00; C08G61/12; C08G61/122; C08G61/123; C08G61/126; C08L; C08L65/00
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
69 words
A process for the preparation of an electrically conductive polymer derived from a 3-alkylthiophene, comprising polymerizing the 3-alkylthiophene chemically in a reaction medium comprising an anhydrous ferric salt, an alkyl halide solvent and water; wherein the amount of water is between 0.01 and 500% by weight of the alkyl halide and wherein the amount of the alkyl halide is between 0.001 and 1 liter per gram of the 3-alkylthiophene.
Claim 2
Dependent Claim
69 words
A process for the preparation of an electrically conductive polymer derived from a 3-alkylthiophene, comprising polymerizing the 3-alkylthiophene chemically in a reaction medium comprising an anhydrous ferric salt, an alkyl halide solvent and water; wherein the amount of water is between 0.01 and 500% by weight of the alkyl halide and wherein the amount of the alkyl halide is between 0.001 and 1 liter per gram of the 3-alkylthiophene.
Claim 3
Dependent Claim
22 words
A process according to claim 1, wherein the molar ratio between the water and the ferric salt is between 0.1 and 6.
Claim 4
Dependent Claim
21 words
A process according to claim 1, wherein the alkyl halide is selected from the group consisting of chloroform and methylene chloride.
Claim 5
Dependent Claim
13 words
A process according to claim 1, wherein the ferric salt is ferric chloride.
Claim 6
Dependent Claim
22 words
A process according to claim 1, wherein the molar ratio between the ferric salt and the 3-alkylthiophene is between 1 and 25.
Claim 7
Dependent Claim
16 words
A process according to claim 1, conducted at the temperature of between 0° and 15° C.
Claim 8
Dependent Claim
40 words
A process according to claim 1, further comprising mixing the polymer with a thermoplastic polymer selected from the group consisting of polyvinyl chloride, polyethylene and a copolymer of ethylene and vinyl acetate, and malaxating and hot-pressing the thus obtained mixture.
Claim 9
Dependent Claim
11 words
A process according to claim 1, wherein the 3-alkylthiophene is 3-n-octylthiophene.
Claim 10
Dependent Claim
26 words
A process according to claim 1, wherein the alkyl substituent of the 3-alkylthiophene is a straight chain or branched chain C 6 -C 9 alkyl radical.
Claim 11
Dependent Claim
49 words
A process according to claim 9, wherein the polymer is selected from the group consisting of a homopolymer of the 3-alkylthiophene or a copolymer containing thiophene units and units derived from 3-alkylthiophene in which the alkyl substituent is a straight chain or branched C 6 -C 9 alkyl radical.
Claim 12
Dependent Claim
25 words
A process according to claim 10, wherein the polymer is the copolymer comprising less than 50% of the thiophene units, of the total polymer units.
Claim 13
Dependent Claim
25 words
A process according to claim 11, wherein the polymer is the copolymer comprising less than 30% of the thiophene units, of the total polymer units.
Claim 14
Dependent Claim
17 words
A process according to claim 1, wherein the ferric salt is an organic or inorganic ferric salt.
Claim 15
Dependent Claim
15 words
A process according to claim 13, wherein the ferric salt is an inorganic ferric salt.
Claim 16
Dependent Claim
22 words
A process according to claim 14, wherein the inorganic ferric salt is a ferric chloride, a ferric sulphate or a ferric nitrate.
Claim 17
Dependent Claim
16 words
A process according to claim 1, wherein the alkyl halide contains 1 to 10 carbon atoms.
Claim 18
Dependent Claim
16 words
A process according to claim 16, wherein the alkyl halide contains 1 to 4 carbon atoms.
Claim 19
Dependent Claim
22 words
A process according to claim 2, wherein the molar ratio between the water and the ferric salt is between 0.1 and 5.
Claim 20
Dependent Claim
22 words
A process according to claim 18, wherein the molar ratio between the water and the ferric salt is between 0.3 and 4.
Claim 21
Dependent Claim
23 words
A process according to claim 1, wherein the amount of the water is between 0.1 and 250% by weight of the alkyl halide.
Claim 22
Dependent Claim
16 words
A process according to claim 6 conducted at the temperature of between 2° and 10° C.
Claim 23
Dependent Claim
130 words
A process for preparation of an electrically conductive polymer derived from a 3-alkylthiophene, comprising polymerizing the 3-alkylthiophene chemically in a reaction medium comprising an anhydrous ferric salt, an alkyl halide solvent and water; said process conducted at the molar ratio between the water and the ferric salt of between 0.01 and 6; the alkyl halide is selected from the group consisting of chloroform and methylene chloride; the anhydrous salt is anhydrous ferric chloride; the molar ratio between the anhydrous ferric chloride and the 3-alkylthiophene is between 1 and 25; the amount of the alkyl halide is between 0.001 and 1 liter per gram of the 3-alkylthiophene; the amount of the water is between 0.01 and 500% by weight of alkyl halide; and the temperature is between 0° and 15° C.
Claim 24
Dependent Claim
130 words
A process for preparation of an electrically conductive polymer derived from a 3-alkylthiophene, comprising polymerizing the 3-alkylthiophene chemically in a reaction medium comprising an anhydrous ferric salt, an alkyl halide solvent and water; said process conducted at the molar ratio between the water and the ferric salt of between 0.01 and 6; the alkyl halide is selected from the group consisting of chloroform and methylene chloride; the anhydrous salt is anhydrous ferric chloride; the molar ratio between the anhydrous ferric chloride and the 3-alkylthiophene is between 1 and 25; the amount of the alkyl halide is between 0.001 and 1 liter per gram of the 3-alkylthiophene; the amount of the water is between 0.01 and 500% by weight of alkyl halide; and the temperature is between 0° and 15° C.
Claim 25
Dependent Claim
40 words
A process according to claim 22, further comprising mixing the polymer with a thermoplastic polymer selected from the group consisting of polyvinyl chloride, polyethylene and a copolymer of ethylene and vinyl acetate, and malaxating and hot-pressing the thus obtained mixture.
Claim 26
Dependent Claim
11 words
A process according to claim 23, wherein the 3-alkylthiophene is 3-n-octylthiophene.
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