EP0162979A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Electrically conductive microballoons and compositions incorporating same
Assignee: Carolina Solvents Inc
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Filing: 1984-09-03
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Granted: —
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Expires: 2004-09-03
Abstract
Abstract Electrically conductive microparticles characterized by high conductivity and low density are comprised of electrically nonconductive microballoons having an electrically conductive coating of metal. When dispersed in an electrically nonconductive matrix, an electrically conductive composite material is formed in which the microparticles form a network of contacting particles throughout the matrix.
Inventors
- 👤 Wayne Laval Gindrup
- 👤 Rebecca Reeves Vinson
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 22:54
CPC Classifications
H; H05; H05K; H05K9/00; H05K9/0073; H05K9/0081; H05K9/0083; C; C03; C03C; C03C17/00; C03C17/06; C03C17/10; C03C17/22; C04; C04B; C04B20/00; C04B20/10; C04B20/1055; C04B20/1062; C04B41/00; C04B41/45; C04B41/4584; C08; C08K; C08K7/00; C08K7/22; C08K7/24; C08K7/26; C08K9/00; C08K9/02; C08K9/12; C09; C09C; C09C3/00; C09C3/06; C09C3/066; C09D; C09D5/00; C09D5/24; C09D5/32; H01; H01B; H01B1/00; H01B1/20; H01B1/22; H01Q; H01Q17/00; H01Q17/002; C01; C01P; C01P2004/00; C01P2004/30; C01P2004/32; C01P2004/34; C01P2004/60; C01P2004/61; C01P2004/80; C01P2006/00; C01P2006/10; C01P2006/40; C03C2217/00; C03C2217/20; C03C2217/28; H05K1/00; H05K1/02; H05K1/09; H05K1/092; H05K1/095; H05K3/00; H05K3/30; H05K3/32; H05K3/321; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993; Y10T428/2996
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
29 words
An electrically conductive microparticle characterized by high conductivity and low density, said microparticle comprising a microballoon and a coating of electrically conductive material on the surface of said microballoon.
Claim 2
Dependent Claim
29 words
An electrically conductive microparticle characterized by high conductivity and low density, said microparticle comprising a microballoon and a coating of electrically conductive material on the surface of said microballoon.
Claim 3
Dependent Claim
28 words
An electrically conductive microparticle according to Claim 1 wherein said microballoon has a diameter of from 1 to 500 microns and a specific gravity of 0.2 to 2.
Claim 4
Dependent Claim
14 words
An electrically conductive microparticle according to Claim 1 wherein said microballoon has magnetic properties.
Claim 5
Dependent Claim
20 words
An electrically conductive microparticle according to Claim I wherein said coating of an electrically conductive material is a metal plating.
Claim 6
Dependent Claim
77 words
An electrically conductive microparticle characterized by high conductivity and low density, said microparticle comprising: an electrically nonconductive microballoon having a diameter of between about 1 and 500 microns and a specific gravity of between about 0.2 and 2; and an electrically conductive coating of metal on the surface of said microballoon, said metal being chosen from the group consisting of silver, copper, nickel, gold, platinum, palladium, osmium, iridium and tin and alloys consisting essentially of these metals.
Claim 7
Dependent Claim
77 words
An electrically conductive microparticle characterized by high conductivity and low density, said microparticle comprising: an electrically nonconductive microballoon having a diameter of between about 1 and 500 microns and a specific gravity of between about 0.2 and 2; and an electrically conductive coating of metal on the surface of said microballoon, said metal being chosen from the group consisting of silver, copper, nickel, gold, platinum, palladium, osmium, iridium and tin and alloys consisting essentially of these metals.
Claim 8
Dependent Claim
18 words
An electrically conductive microparticle according to Claims 1 or 5 wherein said microballoon is comprised of ceramic material.
Claim 9
Dependent Claim
38 words
An electrically conductive microparticle according to Claim 6 wherein said ceramic material includes a magnetic material selected from the group consisting of iron, nickel, iron oxide, ferrite, or mixtures of these materials imparting magnetic properties to the microballoon.
Claim 10
Dependent Claim
17 words
An electrically conductive microparticle according to Claims 1 or 5 wherein said microballoon is comprised of glass.
Claim 11
Dependent Claim
26 words
An electrically conductive composite material comprising a network of contacting electrically conductive microparticles as defined in Claims 1 or 5 disposed in an electrically nonconductive matrix.
Claim 12
Dependent Claim
32 words
An electrically conductive coating comprising a layer of contacting electrically conductive microparticles as defined in Claims 1 or 5 forming an electrically conductive network and adhered to an electrically nonconductive polymer base.
Claim 13
Dependent Claim
27 words
An electrically conductive adhesive composition comprising a network of contacting electrically conductive microparticles as defined in Claims 1 or 5 disposed in an electrically nonconductive polymeric adhesive.
Claim 14
Dependent Claim
25 words
An electrically conductive liquid comprising a network of contacting electrically conductive microparticles as defined in Claims 1 or 5 dispersed in an electrically nonconductive liquid.
Claim 15
Dependent Claim
32 words
An electrically conductive composite material according to Claim 9 wherein said microballoons have a diameter of between about 1 and 500 microns, and a specific gravity of between about 0.2 and 2.
Claim 16
Dependent Claim
15 words
An electrically conductive composite material according to Claim 9 wherein said microballoons comprise ceramic microballoons.
Claim 17
Dependent Claim
15 words
An electrically conductive composite material according to Claim 9 wherein said microballoons comprise glass microballoons.
Claim 18
Dependent Claim
27 words
An electrically conductive composite material according to Claim 9 wherein said microballoons have magnetic properties and are attracted to one another to form said electrically conductive network.
Claim 19
Dependent Claim
30 words
An electrically conductive composite material according to Claim 16 wherein said magnetic material comprises one or more members selected from the group consisting of iron, nickel, iron oxide or ferrite.
Claim 20
Independent Claim
73 words
A method of producing the electrically conductive microparticles according to Claims 1 or 5 comprising dispersing microballoons in a plating solution consisting essentially of (a) a salt of one or more metals selected from the group consisting of silver, copper, nickel, gold platinum, osmium, iridium and tin; (b) a reducing sugar and (c) a chelating agent and chemical reducing the metal salt to form a metal coating on the surface of the microballoons.
Claim 21
Independent Claim
75 words
A method of producing the electrically conductive microparticles according to Claims 1 or 5 comprising sensitizing the surface of the microballoons by treatment with the salt of a metal selected from the group consisting of tin, platinum and palladium, and thereafter forming a metal plating onto the sensitized surface by chemically reducing a salt of one or more metals selected from the group consisting of silver, copper, nickel, gold, platinum, palladium, osmium, iridium and tin.
Claim 22
Dependent Claim
27 words
A method according to Claim 19 wherein the reducing of the metal salt is carried out by a reducing sugar in the presence of a chelating agent.
References Cited (Backward Citations)
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