EP0421814A2
Expired / Lapsed
EP
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Conductive plastic composite and its preparation and use
Assignee: Neste Oyj
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Filing: 1990-10-05
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Granted: —
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Expires: 2010-10-05
Abstract
Abstract The invention relates to the homogenization of mixtures of internally conductive polymers like 3-substituted polythiophene and matrix polymers. With an efficient homogenization the conductivity is improved when the portion of the conductive polymer is low. An efficient homogenization is achieved in the invention by mixing the internally conductive polymer with a monomer or by dissolving it into it, after which the monomer is polymerized. The plastic composites so obtained are used for several purposes in which conductivity is needed, such as electromagnetic interference and antistatic shielding.
Inventors
- 👤 Torvald Vestberg
- 👤 Jukka Laakso
- 👤 Jan-Erik Osterholm
- 👤 Ismo Lehtiniemi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 12:27
CPC Classifications
H; H05; H05K; H05K9/00; H05K9/0073; H05K9/0079; C; C08; C08G; C08G61/00; C08G61/12; C08G61/122; C08G61/123; C08G61/126; H01; H01B; H01B1/00; H01B1/06; H01B1/12; H01B1/124; H01B1/127; H05K9/0081
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
69 words
A process for the preparation of a conductive plastic composite wherein a matrix polymer is brought together with an internally conductive polymer and optionally with one or more plastics additives and wherein the conductive polymer is doped at some stage, characterized in that the conductive polymer is dissolved or dispersed in a matrix monomer or a matrix monomer mixture and the matrix monomer(s) is(are) polymerized to the matrix polymer.
Claim 2
Dependent Claim
69 words
A process for the preparation of a conductive plastic composite wherein a matrix polymer is brought together with an internally conductive polymer and optionally with one or more plastics additives and wherein the conductive polymer is doped at some stage, characterized in that the conductive polymer is dissolved or dispersed in a matrix monomer or a matrix monomer mixture and the matrix monomer(s) is(are) polymerized to the matrix polymer.
Claim 3
Dependent Claim
25 words
A process according to claim 1, in which the internally conductive polymer is partly or entirely dissolved in the matrix monomer or matrix monomer mixture.
Claim 4
Dependent Claim
18 words
A process according to claim l or 2, in which the internally conductive polymer is a poly(3-substituted thiophene).
Claim 5
Dependent Claim
14 words
A process according to claim 3, wherein the poly(3-substituted thiophene) is a poly(3-alkyl thiophene).
Claim 6
Dependent Claim
23 words
A process according to any one of the preceding claims, in which the matrix monomer is a monomer polymerizable by a radical mechanism.
Claim 7
Dependent Claim
40 words
A process according to claim 5, wherein the monomer is styrene, vinyl chloride, ethylene, vinyl acetate, acrylic or methacrylic acid or an ester thereof, acrylic amide or acrylonitrile or mixtures of these monomers with each other or with other comonomers.
Claim 8
Dependent Claim
22 words
A process according to claims 5 or 6 in which the polymerization is carried out in suspension, emulsion or as mass polymerization.
Claim 9
Dependent Claim
28 words
A process according to any one of the preceding claims, in which the plastic composite has been brought into conductive form by doping with iodine or ferric chloride.
Claim 10
Dependent Claim
34 words
A process according to any one of the preceding claims, in which the internally conductive polymer is present in an amount of from 0.1 to 50% by weight of the conductive plastic composite obtained.
Claim 11
Dependent Claim
29 words
A process according to any one of the preceding claims, which is effected such that the conductive plastic composite obtained has a conductivity of from 10⁻¹⁰ to 100 S/cm.
Claim 12
Dependent Claim
20 words
A process according to any one of the preceding claims, in which the conductive plastic composite obtained is further processed.
Claim 13
Dependent Claim
25 words
A process according to claim 11, wherein the conductive plastic composite obtained is further processed by extrusion molding, injection molding, compression molding or film blowing.
Claim 14
Dependent Claim
32 words
A process according to any one of the preceding claims in which the conductive plastic composite obtained is used as an electromagnetic interference shield, as an antistatic shield or as a dyestuff.
Claim 15
Dependent Claim
60 words
A conductive plastic composite which consists essentially of a matrix polymer, an internally conductive doped polymer and optionally one or more plastics additives, characterized in that the conductive plastic composite has been produced by dissolving or dispersing an internally conductive polymer in a matrix monomer or a matrix monomer mixture and by polymerizing the matrix monomer(s) into a matrix polymer.
Claim 16
Dependent Claim
60 words
A conductive plastic composite which consists essentially of a matrix polymer, an internally conductive doped polymer and optionally one or more plastics additives, characterized in that the conductive plastic composite has been produced by dissolving or dispersing an internally conductive polymer in a matrix monomer or a matrix monomer mixture and by polymerizing the matrix monomer(s) into a matrix polymer.
References Cited (Backward Citations)
No citation records indexed.
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