WO1999023152A1 - Elektrisch leitfähiger füllstoff und verfahren zu dessen herstellung - Google Patents
Elektrisch leitfähiger füllstoff und verfahren zu dessen herstellung Download PDFInfo
- Publication number
- WO1999023152A1 WO1999023152A1 PCT/DE1998/003267 DE9803267W WO9923152A1 WO 1999023152 A1 WO1999023152 A1 WO 1999023152A1 DE 9803267 W DE9803267 W DE 9803267W WO 9923152 A1 WO9923152 A1 WO 9923152A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- micro
- filler according
- conductive
- hollow body
- microns
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/223—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating specially adapted for coating particles
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/22—Expanded, porous or hollow particles
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/18—Pretreatment of the material to be coated
- C23C18/20—Pretreatment of the material to be coated of organic surfaces, e.g. resins
- C23C18/2006—Pretreatment of the material to be coated of organic surfaces, e.g. resins by other methods than those of C23C18/22 - C23C18/30
- C23C18/2046—Pretreatment of the material to be coated of organic surfaces, e.g. resins by other methods than those of C23C18/22 - C23C18/30 by chemical pretreatment
- C23C18/2073—Multistep pretreatment
- C23C18/2086—Multistep pretreatment with use of organic or inorganic compounds other than metals, first
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/18—Pretreatment of the material to be coated
- C23C18/20—Pretreatment of the material to be coated of organic surfaces, e.g. resins
- C23C18/28—Sensitising or activating
- C23C18/30—Activating or accelerating or sensitising with palladium or other noble metal
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/20—Conductive material dispersed in non-conductive organic material
- H01B1/22—Conductive material dispersed in non-conductive organic material the conductive material comprising metals or alloys
Definitions
- the invention relates to an electrically conductive filler for a conductive plastic material according to the preamble of claim 1 and a method for its production.
- a multi-part shielding seal which consists of an elastic support and a highly conductive cover layer and allows both prefabrication of housing parts with a seal before assembly and repeated opening of the housing after the first closing.
- the inhomogeneity problems that arise due to the high specific weight of the metal particles providing the conductivity of the material are specifically to be countered.
- the manufacture of the multi-component seal is complex.
- EP-B-0 629 114 has therefore established itself in mass production, in which the conductive material in a pasty starting state is applied directly to a housing part by means of pressure from a needle or nozzle and adheres there whose surface is elastically solidified that
- Shielding profile forms. Its profile shape is determined by the appropriate choice of cross-sectional shape and size and scanning speed of the needle or nozzle as well as by setting the material properties such as viscosity, Thixotropy and hardening or crosslinking speed predetermined.
- the fillers used are, in particular, solid noble metal particles, for example made of silver, noble metal-coated particles with a base core, such as Ag or Pt-coated Cu or Ni particles, composites of base metals, such as Ni-coated Cu -Particles, or also precious metal-coated glass or ceramic particles.
- a base core such as Ag or Pt-coated Cu or Ni particles
- composites of base metals such as Ni-coated Cu -Particles
- precious metal-coated glass or ceramic particles are, in particular, solid noble metal particles, for example made of silver, noble metal-coated particles with a base core, such as Ag or Pt-coated Cu or Ni particles, composites of base metals, such as Ni-coated Cu -Particles, or also precious metal-coated glass or ceramic particles.
- the well-known fillers based on carbon do not meet today's requirements in terms of their conductivity.
- the invention is therefore based on the object of specifying an improved electrically conductive filler for plastics and a process for its production.
- the object is achieved by a filler with the features specified in claim 1 or a method with the features of claim 10 or 12.
- the invention includes the basic idea of forming the filler from gas-filled, hollow micro-bodies having an elastically deformable metal shell and having a low density.
- the wall of the micro-hollow body is preferably two-layered, with an inner shell made of plastic, and essentially gas-tight, which together gives the desired high degree of elasticity, in particular elastic compressibility, of the filling body.
- the wall can also consist exclusively of an essentially closed metal layer.
- thermoplastic or thermosetting plastic compound filled with such a pourable filler - especially a conductive sealing compound or a conductive gap-filling adhesive or a conductive coating compound - has a relatively low metal content, a low density and a high elasticity and resilience and is suitable and suitable for all volume adaptability requirements is therefore excellent for many tasks in the field of electromagnetic shielding, but also beyond.
- the micro hollow bodies advantageously have a diameter in the range between 5 ⁇ m and 100 ⁇ m, in particular between 15 ⁇ m and 50 ⁇ m, and in the simplest case an air filling under approximately normal or atmospheric pressure.
- an air filling under approximately normal or atmospheric pressure.
- the internal pressure as parameters which significantly influence the elasticity, can also deviate from normal pressure, in particular a moderate excess pressure.
- the easiest to manufacture are the hollow bodies in approximately hollow spherical shape.
- the admixture of a filler with this hollow body shape (according to metallic shear coating) to a matrix material results in a sealing material with isotropic mechanical and electrical properties.
- the elongated micro-hollow bodies can be aligned due to the dynamic interface orientation effects, and subsequent consolidation on the base preserves this alignment.
- the metallic shell preferably comprises the entire surface of the micro hollow body. It thus ensures their gas-tightness and makes them largely incompressible without significantly affecting the elasticity of the formula. It has an average thickness in the range between 0.1 ⁇ m and 5 ⁇ m, which is matched to the dimensions of the hollow micro-bodies in such a way that the effective density of the coated hollow micro-bodies is of the order of the density of a plastic matrix in which the conductive one Filler should be used.
- the selection of the size of the micro-hollow bodies and the average shell thickness, which are coordinated with one another in this way in order to achieve a desired average density, takes place overall with the overarching goal of achieving a predetermined level of volume conductivity. It should be noted that the conductivity of the filler in a matrix is also significantly influenced by the structure of the coating (see below).
- the metallic shell consists of at least two layers, only the outer layer being a noble metal layer.
- the surface of the metallic coating is preferably rough or porous, up to strongly structured coatings with crystallite or dendritic or star-shaped, largely radially oriented extensions made of the coating material, which have an intimate connection with the matrix in a sealing compound and - via a regular one Interlocking of the adjacent hollow bodies in the matrix - ensure high volume conductivity even with a relatively low degree of filling.
- Such a distinctive surface structure is advantageously achieved using vacuum coating processes, for example vapor deposition in a vacuum or in a sputtering process.
- the conductive coating is formed in a cost-effective manner, preferably by means of an electroless and / or an electrolytic liquid-phase metallization process or electroplating process.
- the formation of the leading Capable coating expediently comprises — in particular on plastic hollow micro-bodies — a first step of forming a first metallization layer in an electroless metallization process and a second step of forming a second metallization layer in an electrolytic metallization process.
- the formation of the conductive coating is carried out by means of a gas phase metallization process, in particular vacuum evaporation or reactive sputtering.
- At least one step of etching or pickling the surface of the micro-hollow bodies is preferably carried out before and / or after the formation of the conductive coating in order to roughen or porosize the surface.
- Such treatment prior to metallization improves the adhesion of the metal layer or, in the case of certain thermoplastics, ensures adequate adhesion in the first place.
- the pronounced surface structure can be achieved by suitably setting the process parameters, for example the HF voltage, the temperature of the sample holder and the material and transport gas composition and flow rates in a sputtering process, without any special pretreatment or aftertreatment being necessary.
- a primary structure can be produced in the plastic surface, which then results in a secondary structure of the Ag layer which arises through suitable process control in the coating step advantageously superimposed, so that - based on the average particle diameter - large tip-to-tip distances can be achieved.
- a filler gives a synthetic resin-based sealing material a sufficiently high conductivity even at a relatively low concentration and also has a particularly low tendency to sedimentation.
- the filler consists of approximately cuboid thermoplastic hollow bodies (for example of one of the abovementioned polymers or polyimide) with “edges” in the range between 10 and 40 ⁇ m and a metallization of a Ni layer and an overlying porous one Ag layer with a total thickness of approx. 2 ⁇ m.
- the Ni layer is applied after pickling the initial hollow bodies in a chromium-sulfuric acid bath, in a cleaning bath and precious metal activation in a Pd-containing activation bath without current, while the subsequent deposition of the Ag layer takes place electrolytically.
- the hollow body fill is accommodated in an immersion drum with a correspondingly fine-meshed wall.
- the hollow bodies consist exclusively of a Ni or NI / Ag metal shell with a wall thickness of 4 to 5 ⁇ m and are formed by applying a metal layer on plastic particles of a suitable diameter and then removing the plastic core by pyrolysis.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Health & Medical Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Polymers & Plastics (AREA)
- Medicinal Chemistry (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Dispersion Chemistry (AREA)
- Physics & Mathematics (AREA)
- Inorganic Chemistry (AREA)
- Laminated Bodies (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Conductive Materials (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
- Physical Vapour Deposition (AREA)
Abstract
Description
Claims
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
HU0004285A HUP0004285A3 (en) | 1997-11-03 | 1998-11-03 | Electrically conductive filler and method for the production thereof |
EP98962226A EP1030880A1 (de) | 1997-11-03 | 1998-11-03 | Elektrisch leitfähiger füllstoff und verfahren zu dessen herstellung |
CA 2309074 CA2309074A1 (en) | 1997-11-03 | 1998-11-03 | Electrically conductive filler and method for the production thereof |
AU17495/99A AU730445B2 (en) | 1997-11-03 | 1998-11-03 | Electrically conductive filler and process for the production thereof |
DE19881647T DE19881647D2 (de) | 1997-11-03 | 1998-11-03 | Elektrisch leitfähiger Füllstoff und Verfahren zu dessen Herstellung |
IL13586298A IL135862A0 (en) | 1997-11-03 | 1998-11-03 | Electrically conductive filler and method for the production thereof |
JP2000519021A JP2001521964A (ja) | 1997-11-03 | 1998-11-03 | 電気伝導性充填剤 |
NO20002323A NO312902B1 (no) | 1997-11-03 | 2000-05-02 | Elektrisk ledende fyllstoff for ledende plastmaterialer |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19749956 | 1997-11-03 | ||
DE19749956.2 | 1997-11-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999023152A1 true WO1999023152A1 (de) | 1999-05-14 |
Family
ID=7848379
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1998/003267 WO1999023152A1 (de) | 1997-11-03 | 1998-11-03 | Elektrisch leitfähiger füllstoff und verfahren zu dessen herstellung |
Country Status (13)
Country | Link |
---|---|
EP (1) | EP1030880A1 (de) |
JP (1) | JP2001521964A (de) |
KR (1) | KR100421334B1 (de) |
CN (1) | CN1283213A (de) |
AU (1) | AU730445B2 (de) |
CA (1) | CA2309074A1 (de) |
DE (1) | DE19881647D2 (de) |
HU (1) | HUP0004285A3 (de) |
IL (1) | IL135862A0 (de) |
NO (1) | NO312902B1 (de) |
RU (1) | RU2199556C2 (de) |
TR (1) | TR200001006T2 (de) |
WO (1) | WO1999023152A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015047605A1 (en) | 2013-09-24 | 2015-04-02 | Henkel IP & Holding GmbH | Pyrolized organic layers and conductive prepregs made therewith |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2207353C2 (ru) * | 1997-11-03 | 2003-06-27 | Хельмут КАЛЬ | Электропроводящий синтетический материал и электропроводящий экранирующий профиль |
CN104448562A (zh) * | 2014-12-04 | 2015-03-25 | 苏州润佳工程塑料股份有限公司 | 一种包覆型导电粉体及其制备方法 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6096548A (ja) * | 1983-10-31 | 1985-05-30 | Nippon Chem Ind Co Ltd:The | 導電性材料 |
WO1986003995A1 (en) * | 1984-12-31 | 1986-07-17 | Paper Applications International, Inc. | Metal-coated hollow microspheres |
JPH05140367A (ja) * | 1991-11-22 | 1993-06-08 | Japan Synthetic Rubber Co Ltd | 複合粒子、中空粒子とそれらの製造方法 |
WO1995022639A2 (de) * | 1994-02-18 | 1995-08-24 | Universität Karlsruhe Th | Verfahren zur herstellung beschichteter polymerer mikropartikel |
DE19518942A1 (de) * | 1995-05-23 | 1996-11-28 | Fraunhofer Ges Forschung | Verfahren zur Herstellung von metallisierten Polymerpartikeln und nach dem Verfahren hergestelltes Polymermaterial |
-
1998
- 1998-11-03 DE DE19881647T patent/DE19881647D2/de not_active Ceased
- 1998-11-03 TR TR200001006T patent/TR200001006T2/xx unknown
- 1998-11-03 JP JP2000519021A patent/JP2001521964A/ja active Pending
- 1998-11-03 IL IL13586298A patent/IL135862A0/xx unknown
- 1998-11-03 RU RU2000114187A patent/RU2199556C2/ru not_active IP Right Cessation
- 1998-11-03 KR KR10-2000-7004820A patent/KR100421334B1/ko not_active IP Right Cessation
- 1998-11-03 WO PCT/DE1998/003267 patent/WO1999023152A1/de not_active Application Discontinuation
- 1998-11-03 AU AU17495/99A patent/AU730445B2/en not_active Ceased
- 1998-11-03 CN CN98812782A patent/CN1283213A/zh active Pending
- 1998-11-03 HU HU0004285A patent/HUP0004285A3/hu unknown
- 1998-11-03 EP EP98962226A patent/EP1030880A1/de not_active Withdrawn
- 1998-11-03 CA CA 2309074 patent/CA2309074A1/en not_active Abandoned
-
2000
- 2000-05-02 NO NO20002323A patent/NO312902B1/no not_active IP Right Cessation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6096548A (ja) * | 1983-10-31 | 1985-05-30 | Nippon Chem Ind Co Ltd:The | 導電性材料 |
WO1986003995A1 (en) * | 1984-12-31 | 1986-07-17 | Paper Applications International, Inc. | Metal-coated hollow microspheres |
JPH05140367A (ja) * | 1991-11-22 | 1993-06-08 | Japan Synthetic Rubber Co Ltd | 複合粒子、中空粒子とそれらの製造方法 |
WO1995022639A2 (de) * | 1994-02-18 | 1995-08-24 | Universität Karlsruhe Th | Verfahren zur herstellung beschichteter polymerer mikropartikel |
DE19518942A1 (de) * | 1995-05-23 | 1996-11-28 | Fraunhofer Ges Forschung | Verfahren zur Herstellung von metallisierten Polymerpartikeln und nach dem Verfahren hergestelltes Polymermaterial |
Non-Patent Citations (2)
Title |
---|
DATABASE WPI Section Ch Week 8528, Derwent World Patents Index; Class A60, AN 85-167819, XP002099237 * |
DATABASE WPI Section Ch Week 9327, Derwent World Patents Index; Class A35, AN 93-216948, XP002099236 * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015047605A1 (en) | 2013-09-24 | 2015-04-02 | Henkel IP & Holding GmbH | Pyrolized organic layers and conductive prepregs made therewith |
EP3049246A1 (de) * | 2013-09-24 | 2016-08-03 | Henkel IP & Holding GmbH | Pyrolisierte organische schichten und daraus hergestellte leitfähige prepregs |
EP3049246A4 (de) * | 2013-09-24 | 2017-03-29 | Henkel IP & Holding GmbH | Pyrolisierte organische schichten und daraus hergestellte leitfähige prepregs |
US10308777B2 (en) | 2013-09-24 | 2019-06-04 | Henkel IP & Holding GmbH | Pyrolized organic layers and conductive prepregs made therewith |
Also Published As
Publication number | Publication date |
---|---|
AU730445B2 (en) | 2001-03-08 |
KR20010031755A (ko) | 2001-04-16 |
HUP0004285A3 (en) | 2002-02-28 |
RU2199556C2 (ru) | 2003-02-27 |
IL135862A0 (en) | 2001-05-20 |
NO312902B1 (no) | 2002-07-15 |
HUP0004285A1 (en) | 2001-03-28 |
CA2309074A1 (en) | 1999-05-14 |
KR100421334B1 (ko) | 2004-03-09 |
TR200001006T2 (tr) | 2000-07-21 |
AU1749599A (en) | 1999-05-24 |
JP2001521964A (ja) | 2001-11-13 |
NO20002323L (no) | 2000-06-20 |
EP1030880A1 (de) | 2000-08-30 |
CN1283213A (zh) | 2001-02-07 |
NO20002323D0 (no) | 2000-05-02 |
DE19881647D2 (de) | 2000-04-13 |
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