US3847649A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for depositing a metal layer upon a plastic
Assignee: BBC Brown Boveri AG Switzerland
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Filing: 1973-03-09
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Granted: 1974-11-12
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Expires: 1993-03-09
Abstract
Abstract A metal layer is deposited onto a plastic body by admixing a soluble particulate filler and a metal which is reduceable to a catalytically active metal into a heat hardenable polymeric resin composition, applying heat to simultaneously harden the resin composition and to reduce the metal salt, removing at least one surface layer of the hardened polymeric composition to expose portions of the catalytically active metal particles and the soluble filler particles, which exposed filler particles are removed, and subjecting the treated surface to a metal plating bath for the electroless deposition of metal on the hardened polymeric surface by the catalytic activity of the metal particles.
Inventors
- 👤 V Sova
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:22
CPC Classifications
C; C23; C23C; C23C18/00; C23C18/16; C23C18/18; C23C18/20; C23C18/28; C23C18/30; C23C18/2006; C23C18/2046; C23C18/2073; C23C18/208; C23C18/22; C23C18/24; H; H05; H05K; H05K2203/00; H05K2203/07; H05K2203/0756; H05K2203/0773; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31511; Y10T428/31529; Y10T428/31678; Y10T428/31681; Y10T428/31688; Y10T428/31692
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
164 words
A PROCESS FOR THE DEPOSITION OF A METAL LAYER ONTO A PLASTIC BODY WHICH COMPRISES: A. ADMIXING A SOLVENT, ACID, OR BASE SOLUBLE PARTICULATE FILLER, AND A CATALYTICALLY INACTIVE REDUCEABLE GROUP V111 OR 1B METAL SALT OF THE PERIODIC TABLE INTO A CURABLE POLYMERIC RESIN COMPOSITIONS SELECTED FROM THE GROUP CONSISTING OF EPOXY RESINS, OLEFINS, CARBONATE RESINS, ACRYLIC RESINS, FORMALDEHYDE RESINS, AND POLYESTER RESINS: B. APPLYING HEAT SO AS TO EFFECT CURING OF SAID POLYMERIC RESIN COMPOSITION TO FORM A PLASTIC BODY, AND TO SIMULTANEOUSLY REDUCE SAID METAL SALT FO AN ACTIVE CATALYTIC STATE FOR SUBSEQUENT ELECTROLESS DEPOSITION; C. REMOVING AT LEAST ONE SURFACE LAYER OF SAID CURED COMPOSITION SO AS TO EXPOSE A PORTION OF SAID SOLUBLE FILLER AND SAID REDUCED METAL SALT; AND D. DESOLVING OUT SAID EXPOSED FILLER UNDER CONDITIONS WHICH DO NOT DISSOLVE SAID CURED POLYMERIC RESIN AND SUBJECTING SAID TREATED SURFACE TO AN ELECTROLESS DEPOSITION FROM AN ELECTROLESS DEPOSITION BATH BY THE CATALYSTIC ACTIVITY OF SAID REDUCES METAL SALT.
Claim 2
Dependent Claim
164 words
A PROCESS FOR THE DEPOSITION OF A METAL LAYER ONTO A PLASTIC BODY WHICH COMPRISES: A. ADMIXING A SOLVENT, ACID, OR BASE SOLUBLE PARTICULATE FILLER, AND A CATALYTICALLY INACTIVE REDUCEABLE GROUP V111 OR 1B METAL SALT OF THE PERIODIC TABLE INTO A CURABLE POLYMERIC RESIN COMPOSITIONS SELECTED FROM THE GROUP CONSISTING OF EPOXY RESINS, OLEFINS, CARBONATE RESINS, ACRYLIC RESINS, FORMALDEHYDE RESINS, AND POLYESTER RESINS: B. APPLYING HEAT SO AS TO EFFECT CURING OF SAID POLYMERIC RESIN COMPOSITION TO FORM A PLASTIC BODY, AND TO SIMULTANEOUSLY REDUCE SAID METAL SALT FO AN ACTIVE CATALYTIC STATE FOR SUBSEQUENT ELECTROLESS DEPOSITION; C. REMOVING AT LEAST ONE SURFACE LAYER OF SAID CURED COMPOSITION SO AS TO EXPOSE A PORTION OF SAID SOLUBLE FILLER AND SAID REDUCED METAL SALT; AND D. DESOLVING OUT SAID EXPOSED FILLER UNDER CONDITIONS WHICH DO NOT DISSOLVE SAID CURED POLYMERIC RESIN AND SUBJECTING SAID TREATED SURFACE TO AN ELECTROLESS DEPOSITION FROM AN ELECTROLESS DEPOSITION BATH BY THE CATALYSTIC ACTIVITY OF SAID REDUCES METAL SALT.
Claim 3
Dependent Claim
26 words
The process according to claim 1, wherein the concentration of the metal salt is greater at the surface of the plastic body than within said body.
Claim 4
Dependent Claim
32 words
The process according to claim 1, wherein the powder grains of the metallic salt is reduced to the metallic state so as to initiate a further chemical metal reduction during electroless deposition.
Claim 5
Dependent Claim
24 words
The process according to claim 1, wherein the dissolvable filler is dissolved out by contact with a copper bath capable of dissolving said filler.
Claim 6
Dependent Claim
25 words
The process according to claim 1, wherein the metallized plastic is further inserted into a galvanic bath in order to achieve a second metallic coating
Claim 7
Dependent Claim
22 words
The process according to claim 1, wherein the Group VIII or IB metal salt is silver lactate, iron citrate or gold acetate.
Claim 8
Dependent Claim
14 words
The process according to claim 1, wherein the polymeric resin is an epoxy resin.
Claim 9
Dependent Claim
14 words
The process according to claim 1, wherein the polymeric resin is a polyester resin.
Claim 10
Dependent Claim
17 words
The process according to claim 1, wherein the filler is an amino-poly-carboxylic acid or a salt thereof.
Claim 11
Dependent Claim
16 words
The process according to claim 1, wherein the filler is an oxycarboxylic acid or salt thereof.
Claim 12
Dependent Claim
22 words
The process according to claim 1, wherein the polymeric resin composition is completely hardened prior to the removal of said surface layer.
Claim 13
Dependent Claim
17 words
The process according to claim 1, wherein copper or nickel is electrolessly plated onto said plastic body.
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) | 1977-11-11 | 1978-05-13 | 1978-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-11 | 1982-05-13 | 1982-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-11 | 1986-05-13 | 1986-11-12 | $7700.00 | Window Closed / Lapsed |