US5009708A
Expired / Lapsed
US
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Printing paste and method of applying said paste
Assignee: Robert Bosch GmbH
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Filing: 1989-08-31
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Granted: 1991-04-23
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Expires: 2009-08-31
Abstract
Abstract A printing paste suitable for application by an elastically deformable stamp on a substrate and method for said application. The paste comprises a powdered solid component in an organic carrier with a weight ratio of between 6:4 and 8:2. The organic carrier comprises 4-9% by weight ethyl cellulose, 74-82% alpha-terpineol, and 8-17% benzyl alcohol. The paste may also contain up to 20% by weight of polyethylene glycol. The solid component of the paste is preferably a mixture of platinum and zirconium dioxide which can be applied as an electrically conductive paste to form a conductive coating on a substrate, preferably a tubular or other substrate having a non-planar surface. The paste has a viscosity of between 6 and 8.5 pascal seconds.
Inventors
- 👤 Werner Grunwald
- 👤 Gerhard Holfelder
- 👤 Claudio de la Prieta
- 👤 Kurt Schmid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:10
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/52; C09D11/02; H; H01; H01B; H01B1/00; H01B1/14; H01B1/16; H01B3/00; H01B3/02; H01B3/08; H01B3/084; H01B3/085; H01C; H01C17/00; H01C17/06; H01C17/065; H01C17/06506; H01C17/06593; H05; H05K; H05K1/00; H05K1/02; H05K1/09; H05K1/092; H05K1/097
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
81 words
A printing paste suitable for application on a non-planar substrate, said paste being a thixotropic paste having a viscosity between about 6 and 8.5 pascal·seconds and consisting essentially of a solid component in powder form, and an organic carrier consisting essentially of between 4 and 9% by weight ethyl cellulose, between 74 and 82% alpha-terpineol, and between 8 and 17% benzyl alcohol, and the relative proportions, by weight, between said solid component and said organic carrier being between 6:4 and 8:2.
Claim 2
Dependent Claim
81 words
A printing paste suitable for application on a non-planar substrate, said paste being a thixotropic paste having a viscosity between about 6 and 8.5 pascal·seconds and consisting essentially of a solid component in powder form, and an organic carrier consisting essentially of between 4 and 9% by weight ethyl cellulose, between 74 and 82% alpha-terpineol, and between 8 and 17% benzyl alcohol, and the relative proportions, by weight, between said solid component and said organic carrier being between 6:4 and 8:2.
Claim 3
Dependent Claim
15 words
The paste of claim 1 further comprising polyethylene glycol in an amount up to 20%.
Claim 4
Dependent Claim
13 words
The paste of claim 1 having a viscosity between 6.8 and 8 pascal·seconds.
Claim 5
Dependent Claim
30 words
The paste of claim 3 wherein said organic carrier consists essentially of between 5.5 and 6.5% ethyl cellulose, between 78 and 81% alpha-terpineol, and between 13 and 16% benzyl alcohol.
Claim 6
Dependent Claim
46 words
The paste of claim 1 wherein the solid component comprises at least one material selected from the group consisting of a metal powder, a ceramic powder, a glass powder, a mixture of metal powder and ceramic powder, and a mixture of metal powder and glass powder.
Claim 7
Dependent Claim
27 words
The paste of claim 5, for application of electrically conductive patterns on an insulating substrate, wherein the solid component comprises a mixture of platinum and zirconium dioxide.
Claim 8
Dependent Claim
27 words
The paste of claim 3, for application of electrically conductive patterns on an insulating substrate, wherein the solid component comprises a mixture of platinum and zirconium dioxide.
Claim 9
Dependent Claim
21 words
The paste of claim 7 wherein the ratio of platinum to zirconium dioxide is between about 50:50 and 80:20, by volume.
Claim 10
Dependent Claim
14 words
The paste of claim 8 wherein the zirconium dioxide is fully stabilized zirconium dioxide.
Claim 11
Dependent Claim
27 words
The paste of claim 7 wherein the platinum has a grain size distribution of more than 70% of the platinum grains being between 0.5 and 3 micrometers.
Claim 12
Dependent Claim
16 words
The paste of claim 7 wherein the platinum comprises between about 60 and 70%, by weight.
Claim 13
Dependent Claim
14 words
The paste according to claim 11 wherein platinum comprises about 64% of the paste.
Claim 14
Dependent Claim
70 words
The paste of claim 7 wherein the ratio of platinum to zirconium is between about 50:50 and 80:20 by volume, wherein the platinum comprises between about 60 and 70% by weight of said paste, wherein more than about 70% of said platinum grains are between 0.5 and 3 microns, and wherein the zirconium dioxide is in powder form having a specific surface between 8 and 14 square meters per gram.
Claim 15
Dependent Claim
39 words
The paste of claim 11 containing about 64% by weight of platinum and wherein the platinum has a grain size of about 1 micron, and wherein the zirconium dioxide has a specific surface of about 11 meters per gram.
Claim 16
Dependent Claim
22 words
The paste of claim 12 wherein the organic carrier consists essentially of about 6% ethyl cellulose, 79% alpha-terpineol, and 15% benzyl alcohol.
Claim 17
Dependent Claim
50 words
The paste of claim 7 wherein the paste consists essentially of: 1.5% ethyl cellulose, 19.7% alpha terpineol, 3.8% benzyl alcohol, 64% platinum having a grain size of about 1 micrometer, and 11% fully stabilized zirconium dioxide with a specific surface of 11 square meters per gram, all percentages by weight.
Claim 18
Dependent Claim
22 words
The paste of claim 7 wherein the organic carrier consists essentially of about 6% ethyl cellulose, 79% alpha-terpineol, and 15% benzyl alcohol.
Claim 19
Dependent Claim
25 words
A method for applying a coating on a substrate comprising printing on said substrate an electrically conductive design formed from the paste of claim 6.
Claim 20
Dependent Claim
25 words
A method for applying a coating on a substrate comprising printing on said substrate an electrically conductive design formed from the paste of claim 13.
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) | 1994-04-22 | 1994-10-22 | 1995-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-04-22 | 1998-10-22 | 1999-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-04-22 | 2002-10-22 | 2003-04-23 | $7700.00 | Window Closed / Lapsed |