US4705646A
Expired / Lapsed
US
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Conductive coating
Assignee: The AT&T MVPD Group LLC
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Filing: 1984-12-10
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Granted: 1987-11-10
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Expires: 2004-12-10
Abstract
Abstract Conductive coating (20) is a thorough mixture of 0.03 parts per weight of carbon black together with 0.003 to 0.01 parts per weight of wetting agent and 20 parts of solvent, and further mixing in by low shearing mixing 1/2 to 1 part per weight of thermosetting resin. This is then sprayed into place on the substrate and thermoset. In this particular case, the substrate is exterior face sheet (12) of honeycomb structure (10) which may serve as part of a spacecraft, to electrically conduct away surface charges.
Inventors
- 👤 Preston S. DuPont
- 👤 Robert E. Ritter
- 👤 John P. Stafford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:54
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/20; H01B1/24; B; B64; B64G; B64G1/00; B64G1/22; B64G1/52; B64G1/54; C; C04; C04B; C04B14/00; C04B14/02; C04B14/022; C04B41/00; C04B41/45; C04B41/50; C04B41/5001
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
106 words
A dispersion for spraying onto a surface to act as an electrically conductive coating for the surface comprising: a first mixture consisting essentially of 0.03 parts by weight of carbon black together with a coupling agent and substantially twenty parts by weight of solvent mixed together and dispersed by high shear mixing to provide thorough wetting of the carbon black, mixed by low shear mixing into a second mixture consisting essentially of a thermally crosslinking two-part polymer resin to provide carbon black particles incompletely coated with said second mixture which dries and cures to a coating having a resistance of substantially 6×10 5 ohms per square.
Claim 2
Dependent Claim
106 words
A dispersion for spraying onto a surface to act as an electrically conductive coating for the surface comprising: a first mixture consisting essentially of 0.03 parts by weight of carbon black together with a coupling agent and substantially twenty parts by weight of solvent mixed together and dispersed by high shear mixing to provide thorough wetting of the carbon black, mixed by low shear mixing into a second mixture consisting essentially of a thermally crosslinking two-part polymer resin to provide carbon black particles incompletely coated with said second mixture which dries and cures to a coating having a resistance of substantially 6×10 5 ohms per square.
Claim 3
Dependent Claim
47 words
The disperson of claim 1 wherein the polymer is selected from the group consisting of epoxy and silicone and the proportion of parts to one part by weight of the polymer are substantially: solvent 20 parts, coupling agent 0.003 to 0.01 parts and carbon black 0.03 parts.
Claim 4
Dependent Claim
118 words
A dispersion for spraying onto a surface to act as an electrically conductive coating for the surface comprising: a first mixture consisting of the following materials and proportioned in parts by weight of carbon black 0.03 part, a coupling agent 0.003 part to 0.01 part and 20 parts acetone as a solvent mixed together and dispersed by high shear mixing to provide thorough wetting of the carbon black, mixed by low shear mixing into a second mixture consisting essentially of one part of thermally crosslinking two-part epoxy polymer resin to provide carbon black particles incompletely coated with said epoxy polymer resin which dries and cures to a coating having a resistance of substantially 6×10 5 ohms per square.
Claim 5
Dependent Claim
118 words
A dispersion for spraying onto a surface to act as an electrically conductive coating for the surface comprising: a first mixture consisting of the following materials and proportioned in parts by weight of carbon black 0.03 part, a coupling agent 0.003 part to 0.01 part and 20 parts acetone as a solvent mixed together and dispersed by high shear mixing to provide thorough wetting of the carbon black, mixed by low shear mixing into a second mixture consisting essentially of one part of thermally crosslinking two-part epoxy polymer resin to provide carbon black particles incompletely coated with said epoxy polymer resin which dries and cures to a coating having a resistance of substantially 6×10 5 ohms per square.
Claim 6
Dependent Claim
119 words
A dispersion for spraying onto a surface to act as an electrically conductive coating for the surface comprising: a first mixture consisting essentially of the following materials and proportioned in parts by weight of carbon black 0.03 part, a coupling agent 0.003 part to 0.01 part and 20 parts toluene as a solvent mixed together and dispersed by high shear mixing to provide thorough wetting of the carbon black, mixed by low shear mixing into a second mixture consisting essentially of one part of thermally cross-linking twopart silicone polymer resin to provide carbon black particles incompletely coated with said silicone polymer resin which dries and cures to a coating having a resistance of substantially 6×10 5 ohms per square.
Claim 7
Dependent Claim
119 words
A dispersion for spraying onto a surface to act as an electrically conductive coating for the surface comprising: a first mixture consisting essentially of the following materials and proportioned in parts by weight of carbon black 0.03 part, a coupling agent 0.003 part to 0.01 part and 20 parts toluene as a solvent mixed together and dispersed by high shear mixing to provide thorough wetting of the carbon black, mixed by low shear mixing into a second mixture consisting essentially of one part of thermally cross-linking twopart silicone polymer resin to provide carbon black particles incompletely coated with said silicone polymer resin which dries and cures to a coating having a resistance of substantially 6×10 5 ohms per square.
Claim 8
Dependent Claim
47 words
The dispersion of claim 1 wherein the polymer is a urethane resin, the solvent is xylene urethane and the proportion of parts to one-half part by weight of the urethane polymer are substantially: xylene 20 parts, coupling agent 0.003 to 0.01 parts and carbon black 0.03 parts.
Claim 9
Dependent Claim
13 words
The dispersion of claim 5 wherein said coupling agent is isopropyl, tridodecylbenzenesulfonyl titanate.
Claim 10
Dependent Claim
13 words
The dispersion of claim 2 wherein said coupling agent is isopropyl, tridodecylbenzenesulfonyl titanate.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-11-09 | 1991-05-11 | 1991-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-09 | 1995-05-11 | 1995-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-09 | 1999-05-11 | 1999-11-10 | $7700.00 | Window Closed / Lapsed |