US5182135A
Expired / Lapsed
US
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Process for improving the adherency of metallic coatings deposited without current on plastic surfaces
Assignee: I&T INNOVATION TECHNOLOGY ENTWICKLUNGS-UND HOLDING AG
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Filing: 1991-03-18
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Granted: 1993-01-26
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Expires: 2011-03-18
Abstract
Abstract Activator formulations which contain an aromatic polyurethane as binder are highly suitable for the preparation of non-metallic substrate surfaces for currentless metallization. The metal coatings produced are distinguished by good adhesion.
Inventors
- 👤 Henning Giesecke
- 👤 Gerhard D. Wolf
- 👤 Hanns P. Muller
- 👤 Ulrich VON Gizycki
- 👤 Martin Wienkenhover
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:20
CPC Classifications
C; C23; C23C; C23C18/00; C23C18/16; C23C18/18; C23C18/20; C23C18/28; H; H05; H05K; H05K3/00; H05K3/10; H05K3/18; H05K3/181; H05K3/38; H05K3/386; H05K3/387
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
117 words
A process for improving the adherency of metal coatings deposited without current on plastic surfaces by treating the latter with printing paste formulations which contain, as essential components, a) between about 0.03 to 4.00% by weight of an organometallic noble metal compound as activator, b) between about 10 to 30% by weight of an unreactive polyurethane elastomer as binder, c) between about 5 to 25% by weight of a filler, and d) between about 40 to 90% by weight of a halogen-free solvent having a flashpoint >21° C. and a boiling point >100° C., the sum of the percents by weights of components a), b), c) and d) being less than or equal to 100% by weight.
Claim 2
Dependent Claim
117 words
A process for improving the adherency of metal coatings deposited without current on plastic surfaces by treating the latter with printing paste formulations which contain, as essential components, a) between about 0.03 to 4.00% by weight of an organometallic noble metal compound as activator, b) between about 10 to 30% by weight of an unreactive polyurethane elastomer as binder, c) between about 5 to 25% by weight of a filler, and d) between about 40 to 90% by weight of a halogen-free solvent having a flashpoint >21° C. and a boiling point >100° C., the sum of the percents by weights of components a), b), c) and d) being less than or equal to 100% by weight.
Claim 3
Dependent Claim
20 words
Process according to claim 1, characterized in that the activators used are organometallic compounds of Pd, Pt, Ag or Au.
Claim 4
Dependent Claim
17 words
Process according to claim 1, characterized in that the polyurethane elastomers used are free of isocyanate groups.
Claim 5
Dependent Claim
24 words
Process according to claim 1, characterized in that, in addition, polyisocyanates or oligourethanes or polyurethanes containing free isocyanate groups are added to the formulations.
Claim 6
Dependent Claim
19 words
Process according to claim 1, characterized in that the formulations contain Aerosils, TiO 2 or heavy spars as activators.
Claim 7
Dependent Claim
110 words
A printing paste formulation useful for the production of printed circuits, foil keyboards, pressure-sensitive mats and sensors comprising, as essential components, a) between about 0.03 to 4.00% by weight of an organometallic noble metal compound as activator, b) between about 10 to 30% by weight of an unreactive polyurethane elastomer as binder, c) between about 5 to 25% by weight of a filler, and d) between about 40 to 90% by weight of a halogen-free solvent having a flashpoint >21° C. and a boiling point >100° C., the sum of the percents by weights of components a), b), c) and d) being less than or equal to 100% by weight.
Claim 8
Dependent Claim
110 words
A printing paste formulation useful for the production of printed circuits, foil keyboards, pressure-sensitive mats and sensors comprising, as essential components, a) between about 0.03 to 4.00% by weight of an organometallic noble metal compound as activator, b) between about 10 to 30% by weight of an unreactive polyurethane elastomer as binder, c) between about 5 to 25% by weight of a filler, and d) between about 40 to 90% by weight of a halogen-free solvent having a flashpoint >21° C. and a boiling point >100° C., the sum of the percents by weights of components a), b), c) and d) being less than or equal to 100% by weight.
References Cited (Backward Citations)
US3546009A
Cited
US3928670A
Cited
CA1169720A
Cited
US4368281A
Cited
US4764401A
Cited
US4590115A
Cited
US4493861A
Cited
EP0125617A2
Cited
EP0131195A2
Cited
US4575467A
Cited
US4469714A
Cited
US4830714A
Cited
US4585502A
Cited
US4832989A
Cited
US4910045A
Cited
US4913768A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-01-26 | 1996-07-27 | 1997-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-01-26 | 2000-07-27 | 2001-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-01-26 | 2004-07-27 | 2005-01-26 | $7700.00 | Window Closed / Lapsed |