EP0209395A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Conductive coatings and foams for anti-static protection, energy absorption, and electromagnetic compatibility
Assignee: Acheson Industries Inc
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Filing: 1986-07-18
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Granted: —
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Expires: 2006-07-18
Abstract
Abstract The present invention provides a conductive coating composition comprising, by weight of the composition: (a) 5 to 50 percent total element carbon; (b) 2 to 50 percent of a polymeric binder; (c) 5 to 93 percent of a solvent; and (d) 0 percent to 5 percent of a surfactant; wherein substantially all of the total elemental carbon, by weight of the elemental carbon, is a ground coal-based, calcined coke having an E c value of 27 to 80. Alternatively 5 to 95 percent of the total elemental carbon, by weight of the elemental carbon, is a ground coal-based calcined coke having an E c value of 27 to 80. Such compositions are useful in protecting electronic components from damage by stray electrostatic discharge when applied to a surface in close proximity with the components.
Inventors
- 👤 Robert Emerson Wiley
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 08:43
CPC Classifications
H; H05; H05K; H05K9/00; H05K9/0073; H05K9/0079; C; C08; C08J; C08J9/00; C08J9/0066; C08K; C08K3/00; C08K3/02; C08K3/04; C09; C09D; C09D5/00; C09D5/24; H01; H01B; H01B1/00; H01B1/20; H01B1/24; Y; Y10; Y10S; Y10S524/00; Y10S524/91; Y10S524/911
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
101 words
A coating composition for providing a conductive coating on a surface which may be in close proximity to an electronic component to protect that component from stray electrostatic discharge which comprises, by weight of the composition: (a) 5 to 50 percent total element carbon; (b) 2 to 50 percent of a polymeric binder; (c) 5 to 93 percent of a solvent; and (d) 0 percent to 5 percent of a surfactant; wherein 5 to 95 percent of the total elemental carbon, by weight of the elemental carbon, is a ground coal-based, calcined coke having an E value of 27 to 80.
Claim 2
Dependent Claim
101 words
A coating composition for providing a conductive coating on a surface which may be in close proximity to an electronic component to protect that component from stray electrostatic discharge which comprises, by weight of the composition: (a) 5 to 50 percent total element carbon; (b) 2 to 50 percent of a polymeric binder; (c) 5 to 93 percent of a solvent; and (d) 0 percent to 5 percent of a surfactant; wherein 5 to 95 percent of the total elemental carbon, by weight of the elemental carbon, is a ground coal-based, calcined coke having an E value of 27 to 80.
Claim 3
Dependent Claim
31 words
A composition according to Claim 1 wherein the polymeric binder comprises an acrylic, an acrylic emulsion, an acrylic latex, polyvinyl acetate, polyvinyl chloride, polyvinylidene chloride, an epoxy or a mixture thereof.
Claim 4
Dependent Claim
43 words
A composition according to Claim 2 wherein the polymeric binder comprises an acrylic polymer based on methyl acrylate, ethyl acrylate, methyl methacrylate, ethyl methacrylate, allyl methacrylate, n-butyl methacrylate or isobutyl methacrylate, an epoxy, polyvinyl chloride, polyvinyl acetate, polyvinylidine chloride or a mixture thereof.
Claim 5
Dependent Claim
23 words
A composition according to Claim 3 wherein the polymeric binder comprises a binary mixture of an acrylic and polyvinyl acetate or polyvinyl chloride.
Claim 6
Dependent Claim
80 words
A polymer-based composition for absorbing mechanical or electromagnetic energy which comprises, by weight of the composition: (a) 5 to 50 percent total elemental carbon; (b) 2 to 50 percent of a polymeric binder; (c) 30 to 93 percent of a solvent; and (d) 0 to 5 percent of a surfactant; wherein 5 to 95 percent of the total elemental carbon, by weight of the elemental carbon, is a ground coal-based, calcined coke having an E value of 27 to 80.
Claim 7
Dependent Claim
80 words
A polymer-based composition for absorbing mechanical or electromagnetic energy which comprises, by weight of the composition: (a) 5 to 50 percent total elemental carbon; (b) 2 to 50 percent of a polymeric binder; (c) 30 to 93 percent of a solvent; and (d) 0 to 5 percent of a surfactant; wherein 5 to 95 percent of the total elemental carbon, by weight of the elemental carbon, is a ground coal-based, calcined coke having an E value of 27 to 80.
Claim 8
Dependent Claim
14 words
A composition according to Claim 5 wherein the polymeric binder comprises a foam resin.
Claim 9
Dependent Claim
23 words
A composition to Claim 6 wherein the polymeric binder comprises a urethane foam, a vinyl foam, a silicone foam or a mixture thereof.
Claim 10
Dependent Claim
26 words
A composition according to any one of the preceding Claims wherein 50 to 95 percent of the total elemental carbon is a ground coal-based, calcined coke.
Claim 11
Dependent Claim
21 words
A composition according to Claim 8, wherein 70 to 95 percent of the elemental carbon is a ground coal-based, calcined coke.
Claim 12
Dependent Claim
65 words
A conductive coating composition comprising by weight of the composition: (a) 5 to 50 percent total elemental carbon; (b) 2 to 50 percent of a polymeric binder; (c) 5 to 93 percent of a solvent; and (d) 0 to 5 percent of a surfactant; wherein substantially all of the elemental carbon is a ground coal-based, calcined coke proving an E value of 27 to 80.
Claim 13
Dependent Claim
65 words
A conductive coating composition comprising by weight of the composition: (a) 5 to 50 percent total elemental carbon; (b) 2 to 50 percent of a polymeric binder; (c) 5 to 93 percent of a solvent; and (d) 0 to 5 percent of a surfactant; wherein substantially all of the elemental carbon is a ground coal-based, calcined coke proving an E value of 27 to 80.
Claim 14
Dependent Claim
17 words
A composition according to any one of the preceding Claims wherein the composition is essentially graphite free.
Claim 15
Dependent Claim
20 words
A composition according to any one of the preceding Claims which comprises 5 to 25 percent of total elemental carbon.
Claim 16
Dependent Claim
19 words
A composition according to any one of the preceding Claims which comprises 1 to 2 percent of a surfactant.
Claim 17
Dependent Claim
15 words
A composition according to any one of the preceding Claims wherein the solvent comprises water.
Claim 18
Dependent Claim
17 words
A composition according to any one of the preceding Claims which comprises 30 to 90 percent solvent.
Claim 19
Dependent Claim
13 words
A composition according to Claim 15 which comprises 20 to 75 percent solvent.
Claim 20
Dependent Claim
51 words
A composition according to any one of the preceding Claims which additionally comprises: (a) 0.1 to 5 percent of a thickener; and/or (b) 0.01 to 2.5 percent of a C 3 -C 12 fatty alcohol; and/or (c) 0.01 to 2.5 percent of an antimicrobial or an antifungal or a mixture thereof.
Claim 21
Dependent Claim
21 words
A composition according to any one of the preceding Claims wherein the coke has an E value of 28 to 75.
Claim 22
Dependent Claim
17 words
A composition according to Claim 18 wherein the coke has an E value of 28 to 65.
Claim 23
Dependent Claim
73 words
A container for shipping or storage of an electronic component susceptible to damage from stray electrostatic discharge which comprises a bottom, two opposing side walls, two opposing end walls and a cover, wherein the container has a continuous conductive coating of a composition as defined in any one of the preceding Claims in a cured or uncured state on substantially all the interior surfaces of its bottom, side walls, end walls and cover.
Claim 24
Dependent Claim
21 words
A container according to Claim 20 wherein substantially all of the exterior surfaces of the container are covered with the coating.
Claim 25
Dependent Claim
23 words
A container according to Claim 20 or 21 wherein the end walls and side walls comprise paper, cardboard, fiberboard or a mixture thereof.
Claim 26
Dependent Claim
44 words
A container according to any one of Claims 20 to 22 which additionally comprises a cushion means to protect any contents of the container from physical shock during handling or shipping of the container secured to one or more interior surface of the container.
Claim 27
Dependent Claim
14 words
A container according to Claim 23 wherein the cushion means is a polymer foam.
Claim 28
Dependent Claim
27 words
A container according to Claim 24 wherein the polymer foam is impregnated with a ground, calcined coal-based coke having an E c value of 27 to 80.
Claim 29
Dependent Claim
13 words
A container according to Claim 25 wherein the polymer foam is a urethane.
Claim 30
Dependent Claim
20 words
A composition according to any one of Claims 1 to 19 which is adapted for use in an anechoic chamber.
Claim 31
Dependent Claim
36 words
A composition according to any one of the preceding Claims wherein the E c value is measured for the 002 peak when subjected to X-ray powder diffraction using Mo Ro(radiation with an average wavelength of 0.71R.
References Cited (Backward Citations)
No citation records indexed.
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