US5234627A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stability conductive emulsions
Assignee: EFTEC North America LLC
•
Filing: 1991-12-11
•
Granted: 1993-08-10
•
Expires: 2011-12-11
Abstract
Abstract Improved conductive latex dispersions are disclosed comprising a specific blend of conductive carbon black particles. The carbon black component of the blend comprises acetylene carbon black particles and furnace black particles, with the furnace black particles having a nitrogen surface area (m 2 /gm) of about 250 or greater and a DBP absorption value cc/100 gm of about 180 or above. The dispersions exhibit stable viscosity upon usage and storage and still result in acceptable conductivity.
Inventors
- 👤 Brian L. Damschroder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:08
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/20; H01B1/24; C; C08; C08K; C08K3/00; C08K3/02; C08K3/04
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
79 words
Method of coating wire with a conductive coating comprising providing a stable conductive latex dispersion comprising a blend of about 10-50% acetylene carbon black particles and about 90-50% furnace carbon black particles therein based upon the weight of said carbon black particles present in said dispersion to impart a viscosity to said dispersion of between about 900--about 1250 cps upon storage thereof for about 48 hours--to about 4 weeks, immersing said wire in said dispersion, and drying said wire.
Claim 2
Dependent Claim
79 words
Method of coating wire with a conductive coating comprising providing a stable conductive latex dispersion comprising a blend of about 10-50% acetylene carbon black particles and about 90-50% furnace carbon black particles therein based upon the weight of said carbon black particles present in said dispersion to impart a viscosity to said dispersion of between about 900--about 1250 cps upon storage thereof for about 48 hours--to about 4 weeks, immersing said wire in said dispersion, and drying said wire.
Claim 3
Dependent Claim
39 words
Method as recited in claim 1 wherein said acetylene carbon black particles have a bulk density of 5-15 lbs./ft. 3 and said furnace carbon black particles have a nitrogen surface area (m 2 /gm) of about 250 or greater.
Claim 4
Dependent Claim
23 words
Method as recited in claim 2 wherein said furnace black particles have a DBP absorption value cc/100 gm of about 180 or above.
Claim 5
Dependent Claim
24 words
Method as recited in claim 3 wherein said blend comprises about 1/3 by weight said acetylene black particles and remainder said furnace black particles.
Claim 6
Dependent Claim
14 words
Method as recited in claim 4 wherein said latex comprises an acrylic ester copolymer.
Claim 7
Dependent Claim
16 words
Method as recited in claim 5 wherein said drying comprises subjecting said wire to ambient conditions.
Claim 8
Dependent Claim
20 words
Method as recited in claim 5 wherein said drying comprises subjecting said wire to elevated temperatures of about 400°-500° F.
References Cited (Backward Citations)
US3864305A
Cited
US4005170A
Cited
US3922335A
Cited
US4035336A
Cited
US3952087A
Cited
US4007147A
Cited
US4105750A
Cited
US4279880A
Cited
US4357442A
Cited
US4547311A
Cited
US4534998A
Cited
US4705646A
Cited
US4472463A
Cited
US4619960A
Cited
US4589999A
Cited
US4740426A
Cited
US4810600A
Cited
US4957723A
Cited
US4988562A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-08-09 | 1997-02-08 | 1997-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-08-09 | 2001-02-08 | 2001-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-08-09 | 2005-02-08 | 2005-08-10 | $7700.00 | Window Closed / Lapsed |