US5066706A
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Process for preparing a latex based on polypyrrole and use of this latex to form a conducting film
Assignee: Solvay SA
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Filing: 1989-03-06
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Granted: 1991-11-19
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Expires: 2009-03-06
Abstract
Abstract Process for preparing a latex of polypyrrole in an aqueous reagent medium containing a ferric salt, a hydrolyzed polyvinyl acetate and a dodecyl sulphate. The films prepared with this conducting latex are homogeneous, adhere to metals and metallized glasses and have high conductivity.
Inventors
- 👤 Elise Destryker
- 👤 Etienne Hannecart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:15
CPC Classifications
C; C08; C08C; C08C1/00; H; H01; H01B; H01B1/00; H01B1/06; H01B1/12; H01B1/124; H01B1/127; C08G; C08G61/00; C08G61/12; C08G61/122; C08G61/123; C08G61/124; H01F; H01F1/00; H01F1/42
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
107 words
A process for preparing a latex based on pyrrole or a pyrrole derivative, the latex forming an electrically conductive film upon drying, comprising the following operations: 1) in a first stage, water a ferric salt, a polyvinyl alcohol or derivative of this alcohol and a codispersant agent are introduced into a reactor, to form a reaction medium, wherein said codispersant is an organic compound capable of giving rise to anions selected from the group consisting of alkyl sulphates, aryl sulphates, alkyl sulphonates and aryl sulphonates, and 2) in a second stage, pyrrole or the pyrrole derivative is added to the reaction medium in the presence of water.
Claim 2
Dependent Claim
107 words
A process for preparing a latex based on pyrrole or a pyrrole derivative, the latex forming an electrically conductive film upon drying, comprising the following operations: 1) in a first stage, water a ferric salt, a polyvinyl alcohol or derivative of this alcohol and a codispersant agent are introduced into a reactor, to form a reaction medium, wherein said codispersant is an organic compound capable of giving rise to anions selected from the group consisting of alkyl sulphates, aryl sulphates, alkyl sulphonates and aryl sulphonates, and 2) in a second stage, pyrrole or the pyrrole derivative is added to the reaction medium in the presence of water.
Claim 3
Dependent Claim
32 words
Process according to claim 1, wherein the latex obtained is concentrated, then washed with water and then redispersed in an aqueous solution of polyvinyl alcohol or of a derivative of this alcohol.
Claim 4
Dependent Claim
14 words
Process according to claim 1, wherein the codispersant agent employed is sodium dodecyl sulphate.
Claim 5
Dependent Claim
24 words
Process according to claim 3, wherein sodium dodecyl sulphate is employed at concentrations of between 0.3 and 1 mole per mole of pyrrole derivative.
Claim 6
Dependent Claim
16 words
Process according to claim 1 wherein the polyvinyl alcohol derivative employed is a hydrolysed polyvinyl acetate.
Claim 7
Dependent Claim
24 words
Process according to claim 5, wherein the hydrolysed polyvinyl acetate is employed at concentrations of between 0.1 and 8 g per g of pyrrole.
Claim 8
Dependent Claim
13 words
Process according to claim 1 wherein the ferric salt employed is ferric chloride.
Claim 9
Dependent Claim
22 words
Process according to claim 7, wherein ferric chloride is employed at concentrations of between 2 and 2.7 moles per mole of pyrrole.
Claim 10
Dependent Claim
84 words
A process for preparing a latex based on polymers of pyrrole or a pyrrole derivative in an aqueous reaction medium comprising the sequential steps of forming a solution of water, a ferric salt, a polyvinyl alcohol or a polyvinyl alcohol derivative, and a codispersant agent, wherein said codispersant is an organic compound capable of giving rise to anions selected from the group consisting of alkyl sulphates, aryl sulphates, alkyl sulphonates and aryl sulphonates, and adding the pyrrole or the pyrrole derivative to the solution.
Claim 11
Dependent Claim
84 words
A process for preparing a latex based on polymers of pyrrole or a pyrrole derivative in an aqueous reaction medium comprising the sequential steps of forming a solution of water, a ferric salt, a polyvinyl alcohol or a polyvinyl alcohol derivative, and a codispersant agent, wherein said codispersant is an organic compound capable of giving rise to anions selected from the group consisting of alkyl sulphates, aryl sulphates, alkyl sulphonates and aryl sulphonates, and adding the pyrrole or the pyrrole derivative to the solution.
Claim 12
Dependent Claim
15 words
The process according to claim 9, wherein the codispersant agent contains a dodecyl sulphate group.
Claim 13
Dependent Claim
19 words
The process defined in claim 1, wherein the codispersant agent is an organic compound producing a dodecyl sulfate anion.
Claim 14
Dependent Claim
66 words
A process for preparing a latex based on pyrrole, the latex forming an electrically conductive film upon drying, comprising the following operations: 1) in a first stage, water, ferric chloride, a hydrolyzed polyvinyl acetate, and sodium dodecyl sulphate are introduced into a reactor, to form a reaction medium, and 2) in a second stage, pyrrole is added to the reaction medium in the present of water.
Claim 15
Dependent Claim
66 words
A process for preparing a latex based on pyrrole, the latex forming an electrically conductive film upon drying, comprising the following operations: 1) in a first stage, water, ferric chloride, a hydrolyzed polyvinyl acetate, and sodium dodecyl sulphate are introduced into a reactor, to form a reaction medium, and 2) in a second stage, pyrrole is added to the reaction medium in the present of water.
Claim 16
Dependent Claim
23 words
Process according to claim 12, wherein sodium dodecyl sulphate is employed at concentrations of between 0.3 and 1 mole per mole of pyrrole.
Claim 17
Dependent Claim
24 words
Process according to claim 12, wherein the hydrolyzed polyvinyl acetate is employed at concentrations of between 0.5 and 2 g per g of pyrrole.
Claim 18
Dependent Claim
22 words
Process according to claim 12, wherein ferric chloride is employed at concentrations of between 2 and 2.7 moles per mole of pyrrole.
Claim 19
Dependent Claim
32 words
Process according to claim 12, wherein the latex obtained is concentrated, then washed with water and then redispersed in an aqueous solution of polyvinyl alcohol or of a derivative of this alcohol.
References Cited (Backward Citations)
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