US5176743A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Formulation of activating substrate surfaces for their electroless metallization
Assignee: Bayer AG
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Filing: 1991-05-06
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Granted: 1993-01-05
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Expires: 2011-05-06
Abstract
Abstract Formulations containing an organometallic activator, a filler, a special mixture of organic solvents and a PU elastomer are eminently suitable for activating plastic surfaces for their electroless metallization avoiding stress-corrosion cracking. The plastic parts so activated are preferably used for screening from electromagnetic waves after metallization has been carried out.
Inventors
- 👤 Gunther Reichert
- 👤 Henning Giesecke
- 👤 Gerhard D. Wolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:07
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: 9
Claim 1
Independent Claim
114 words
An activator formulation for activating substrate surfaces for their electroless metallization comprising (a) from 0.03 to 3.0% by weight of one or more organic noble-metal compounds as activator in admixture with (b) from 0.5 to 3.0% by weight of one or more fillers, an organic solvent mixture of (c) from 20 to 60% by weight of one or more glycol either acetates, (d) from 20 to 60% by weight of one or more aliphatic ketones and (e) from 4 to 60% by weight of one or more aliphatic alcohols; and (f) from 4 to 20% by weight of one or more polyurethane elastomers; the sum of components (a) through (f) being 100% by weight.
Claim 2
Dependent Claim
114 words
An activator formulation for activating substrate surfaces for their electroless metallization comprising (a) from 0.03 to 3.0% by weight of one or more organic noble-metal compounds as activator in admixture with (b) from 0.5 to 3.0% by weight of one or more fillers, an organic solvent mixture of (c) from 20 to 60% by weight of one or more glycol either acetates, (d) from 20 to 60% by weight of one or more aliphatic ketones and (e) from 4 to 60% by weight of one or more aliphatic alcohols; and (f) from 4 to 20% by weight of one or more polyurethane elastomers; the sum of components (a) through (f) being 100% by weight.
Claim 3
Dependent Claim
27 words
An activator formulation in accordance with claim 1, wherein said one or more aliphatic ketones is methyl ethyl ketone and said glycol ether acetate is methoxypropyl acetate.
Claim 4
Dependent Claim
16 words
An activator formulation according to claim 1, wherein said organic noble-metal compounds are organometallic palladium compounds.
Claim 5
Dependent Claim
28 words
An activator formulation according to claim 1, wherein the polyurethane elastomers are the reaction products of a polyester having terminal OH groups, a polyisocyanate and a chain extender.
Claim 6
Dependent Claim
125 words
In a method for activating substrate surfaces for their electroless metallization, the improvement wherein said surfaces are first treated by applying a formulation comprising (a) from 0.03 to 3.0% by weight of one or more organic noble-metal compounds as activator in admixture with (b) from 0.5 to 3.0% by weight of one or more fillers, an organic solvent mixture of (c) from 20 to 60% by weight of one or more glycol ether acetates, (d) from 20 to 60% by weight of one or more aliphatic ketones and (e) from 4 to 60% weight of one or more aliphatic alcohols; and (f) from 4 to 20% by weight of one or more polyurethane elastomers; the sum of components (a) through (f) being 100% by weight.
Claim 7
Dependent Claim
125 words
In a method for activating substrate surfaces for their electroless metallization, the improvement wherein said surfaces are first treated by applying a formulation comprising (a) from 0.03 to 3.0% by weight of one or more organic noble-metal compounds as activator in admixture with (b) from 0.5 to 3.0% by weight of one or more fillers, an organic solvent mixture of (c) from 20 to 60% by weight of one or more glycol ether acetates, (d) from 20 to 60% by weight of one or more aliphatic ketones and (e) from 4 to 60% weight of one or more aliphatic alcohols; and (f) from 4 to 20% by weight of one or more polyurethane elastomers; the sum of components (a) through (f) being 100% by weight.
Claim 8
Dependent Claim
148 words
In a method for preparing molding or housing parts metallized on one or both sides by activation and electroless metallization, the improvement comprising treating the surface or surfaces to be metallized by applying a formulation comprising from 0.03 to 3.0% by weight of one or more organic noble-metal compounds as activator in admixture with (b) from 0.5 to 3.0% by weight of one or more fillers, an organic solvent mixture of (c) from 20 to 60% by weight of one or more glycol ether acetates, (d) from 20 to 60% by weight of one or more aliphatic ketones and (e) from 4 to 60% by weight of one or more aliphatic alcohols; and (f) from 4 to 20% by weight of one or more polyurethane elastomers; the sum of components (a) through (f) being 100% by weight prior to heat-treating, reduction and treatment in an electroless metallization bath.
Claim 9
Dependent Claim
148 words
In a method for preparing molding or housing parts metallized on one or both sides by activation and electroless metallization, the improvement comprising treating the surface or surfaces to be metallized by applying a formulation comprising from 0.03 to 3.0% by weight of one or more organic noble-metal compounds as activator in admixture with (b) from 0.5 to 3.0% by weight of one or more fillers, an organic solvent mixture of (c) from 20 to 60% by weight of one or more glycol ether acetates, (d) from 20 to 60% by weight of one or more aliphatic ketones and (e) from 4 to 60% by weight of one or more aliphatic alcohols; and (f) from 4 to 20% by weight of one or more polyurethane elastomers; the sum of components (a) through (f) being 100% by weight prior to heat-treating, reduction and treatment in an electroless metallization bath.
References Cited (Backward Citations)
US3560257A
Cited
US3900320A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1996-01-05 | 1996-07-06 | 1997-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-01-05 | 2000-07-06 | 2001-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-01-05 | 2004-07-06 | 2005-01-05 | $7700.00 | Window Closed / Lapsed |