US5158707A
Expired / Lapsed
US
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Conductive plastic composite and its preparation and use
Assignee: Neste Oyj
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Filing: 1990-09-27
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Granted: 1992-10-27
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Expires: 2010-09-27
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 EMI and ESD shielding.
Inventors
- 👤 Torvald Vestberg
- 👤 Jukka Laakso
- 👤 Jan-Erik sterholm
- 👤 Ismo Lehtiniemi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:15
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: 31
Claim 1
Independent Claim
61 words
A conductive plastic composition made by the process comprising: a) dissolving from 0.1 to 50 percent by weight of a conductive poly(3-substituted thiophene) polymer in to a matrix monomer in liquid state, said matrix monomer being styrene; b) polymerizing said matrix monomer into a matrix polymer by a polymerization process selected from the group consisting of suspension, emulsion and mass polymerization.
Claim 2
Dependent Claim
61 words
A conductive plastic composition made by the process comprising: a) dissolving from 0.1 to 50 percent by weight of a conductive poly(3-substituted thiophene) polymer in to a matrix monomer in liquid state, said matrix monomer being styrene; b) polymerizing said matrix monomer into a matrix polymer by a polymerization process selected from the group consisting of suspension, emulsion and mass polymerization.
Claim 3
Dependent Claim
39 words
The composition of claim 1 wherein said matrix monomer is polymerized with a comonomer(s) selected from the group consisting of: acrylonitrile, methacrylonitrile, 1,2-butadiene, vinyl esters, acrylic esters, methacrylic esters, maleic anhydride, alpha-methyl styrene, divinylbenzene, acrylamide, methacrylamide, and vinyl halides.
Claim 4
Dependent Claim
24 words
The conductive plastic composition of claim 1, which has been brought into conductive form by doping the conductive polymer with iodine or ferric chloride.
Claim 5
Dependent Claim
15 words
The conductive plastic composition of claim 1 wherein the poly(3-substituted thiophene) is a poly(3-alkyl thiophene).
Claim 6
Dependent Claim
20 words
A conductive plastic composite of claim 1, characterized in that its conductivity is within the range of 10 -10 -100S/cm.
Claim 7
Dependent Claim
31 words
A conductive plastic composition of claims 1, 2, 3 or 4, characterized in that it has been further melt processed by using extrusion molding, injection molding, compression molding or blown extrusion.
Claim 8
Dependent Claim
25 words
A conductive plastic composite of claims 1, 2, 3 or 4, characterized in that the internally conductive polymer contained therein also acts as a dyestuff.
Claim 9
Dependent Claim
61 words
A conductive plastic composition made by the process comprising: a) dissolving from 0.1 to 50 percent by weight of a conductive poly(3-substituted thiophene) polymer in to a matrix monomer in liquid state, said monomer being vinyl chloride; b) polymerizing said matrix monomer in to a matrix polymer by a polymerization process selected from the group consisting of suspension or emulsion polymerization.
Claim 10
Dependent Claim
61 words
A conductive plastic composition made by the process comprising: a) dissolving from 0.1 to 50 percent by weight of a conductive poly(3-substituted thiophene) polymer in to a matrix monomer in liquid state, said monomer being vinyl chloride; b) polymerizing said matrix monomer in to a matrix polymer by a polymerization process selected from the group consisting of suspension or emulsion polymerization.
Claim 11
Dependent Claim
37 words
The composition of claim 8 wherein said matrix monomer is polymerized with a comonomer(s) selected from a group consisting of: vinyl esters, alpha-olefins, vinylidene chloride, acrylic and methacrylic esters, acrylonitriles, maleic acid esters and fumaric acid esters.
Claim 12
Dependent Claim
24 words
The conductive plastic composition of claim 8, which has been brought into conductive form by doping the conductive polymer with iodine or ferric chloride.
Claim 13
Dependent Claim
15 words
The conductive plastic composition of claim 8 wherein the poly(3-substituted thiophene) is a poly(3-alkyl thiophene).
Claim 14
Dependent Claim
20 words
A conductive plastic composite of claim 8, characterized in that its conductivity is within the range of 10 -10 -100S/cm.
Claim 15
Dependent Claim
31 words
A conductive plastic composition of claims 8, 9, 10 and 11, characterized in that it has been further melt processed by using extrusion molding, injection molding, compression molding or blown extrusion.
Claim 16
Dependent Claim
25 words
A conductive plastic composite of claims 8, 9, 10 and 11, characterized in that the internally conductive polymer contained therein also acts as a dyestuff.
Claim 17
Dependent Claim
61 words
A conductive plastic composition made by the process comprising: a) dissolving from 0.1 to 50 percent by weight of a conductive poly(3-substituted thiophene) polymer in to a matrix monomer in liquid state, said matrix monomer being a alpha-olefin; b) polymerizing said matrix monomer in to a matrix polymer by a polymerization process selected from the group consisting of solution and suspension.
Claim 18
Dependent Claim
61 words
A conductive plastic composition made by the process comprising: a) dissolving from 0.1 to 50 percent by weight of a conductive poly(3-substituted thiophene) polymer in to a matrix monomer in liquid state, said matrix monomer being a alpha-olefin; b) polymerizing said matrix monomer in to a matrix polymer by a polymerization process selected from the group consisting of solution and suspension.
Claim 19
Dependent Claim
32 words
The composition of claim 15 wherein said matrix monomer is polymerized with a comonomer selected from the group consisting of vinyl acetate, acrylic and methacrylic acids and esters acryl amide and acrylonitrile.
Claim 20
Dependent Claim
24 words
The conductive plastic composition of claim 15, which has been brought into conductive form by doping the conductive polymer with iodine or ferric chloride.
Claim 21
Dependent Claim
15 words
The conductive plastic composition of claim 15 wherein the poly(3-substituted thiophene) is a poly(3-alkyl thiophene).
Claim 22
Dependent Claim
20 words
A conductive plastic composite of claim 15, characterized in that its conductivity is within the range of 10 -10 -100S/cm.
Claim 23
Dependent Claim
31 words
A conductive plastic composition of claims 15, 16, 17 and 18, characterized in that it has been further melt processed by using extrusion molding injection molding, compression molding or blown extrusion.
Claim 24
Dependent Claim
25 words
A conductive plastic composite of claims 15, 16, 17 or 18, characterized in that the internally conductive polymer contained therein also acts as a dyestuff.
Claim 25
Dependent Claim
76 words
A conductive plastic composition made by the process comprising: a) dissolving from 0.1 to 50 percent by weight of a conductive poly(3-substituted thiophene) polymer into a matrix monomer in liquid state; said matrix monomer selected from monomers that form polymers selected from the group consisting of: polyester, polyamide, polyurethane and polysiloxane; b) polymerizing said matrix monomer into a matrix polymer by a polymerization process selected from the group consisting of step polymerization in solution or bulk.
Claim 26
Dependent Claim
76 words
A conductive plastic composition made by the process comprising: a) dissolving from 0.1 to 50 percent by weight of a conductive poly(3-substituted thiophene) polymer into a matrix monomer in liquid state; said matrix monomer selected from monomers that form polymers selected from the group consisting of: polyester, polyamide, polyurethane and polysiloxane; b) polymerizing said matrix monomer into a matrix polymer by a polymerization process selected from the group consisting of step polymerization in solution or bulk.
Claim 27
Dependent Claim
24 words
The conductive plastic composition of claim 21, which has been brought into conductive form by doping the conductive polymer with iodine or ferric chloride.
Claim 28
Dependent Claim
15 words
The conductive plastic composition of claim 21 wherein the poly(3-substituted thiophene) is a poly(3-alkyl thiophene).
Claim 29
Dependent Claim
20 words
A conductive plastic composite of claim 21, characterized in that its conductivity is within the range of 10 -10 -100S/cm.
Claim 30
Dependent Claim
31 words
A conductive plastic composition of claims 21, 22, 23 or 24, characterized in that it has been further melt processed by using extrusion molding, injection molding, compression molding or blown extrusion.
Claim 31
Dependent Claim
25 words
A conductive plastic composite of claims 21, 22, 23 or 24, characterized in that the internally conductive polymer contained therein also acts as a dyestuff.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-10-27 | 1996-04-27 | 1996-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-10-27 | 2000-04-27 | 2000-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-10-27 | 2004-04-27 | 2004-10-27 | $7700.00 | Window Closed / Lapsed |