US3674658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fillers for metallized polyamides
Assignee: Stamicarbon BV
•
Filing: 1970-06-03
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Granted: 1972-07-04
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Expires: 1990-06-03
Abstract
Abstract Objects composed of a metal-coated polyamide plastic, and a process for making same are disclosed in which a polyamide plastic substrate material is made by the hydrolytic polymerization of an omego lactam carried out at a temperature at least at the melting point of the polyamide material in the presence of one or more compounds soluble in the molten lactams, such as polyethers, alcohols of fatty acids having a boiling point above the lactam, organic sulphones, alkali metal halides, paraffins and silicone oils. After appropriate surface treatment of this plastic material, metal coating is deposited by precipitation and by further treatment as by electro deposition, to obtain the metal-coated polyamide plastic object.
Inventors
- 👤 Pieter J Van Asperen
- 👤 Jozef L M Van Der Loos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:18
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/08; C08G69/14; C08L; C08L77/00; C08L77/02; C09; C09D; C09D177/00; C09D177/02; H; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0313; H05K1/032; H05K1/0346; H05K3/00; H05K3/10; H05K3/18; H05K3/181
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
15 words
alcohols and their phosphites of a boiling point above the polymerization temperature of said lactams
Claim 2
Dependent Claim
11 words
The object of claim 1 wherein said lactam monomer is caprolactam.
Claim 3
Dependent Claim
93 words
then chemically depositing an electrically conductive metal film by exposing the substrate object to an aqueous solution of a reducible metal salt in the presence of a reducing agent, whereby a thin, coherent and conductive metal film is provided on the surface of said polyamide substrate, the improvement comprising providing a polyamide substrate made by: i. forming a homogeneous solution of at least one molten lactam monomer having from four to 16 carbon atoms and at least one compounds soluble in said molten lactam, said soluble compound selected from the class consisting of:
Claim 4
Dependent Claim
15 words
alcohols and their phosphites of a boiling point above the polymerization temperature of said lactams,
Claim 5
Dependent Claim
29 words
an organic sulphone of the formula: X-SO2-X'' wherein X and X'' are independently selected from alkyl, cycloalkyl, aryl, aralkyl and alkaryl of about six to about 20 carbon atoms,
Claim 6
Dependent Claim
44 words
In a process for forming a metal-coated plastic object including the steps of: a. at least microscopicAlly roughening the surface of a polyamide substrate, and then b. depositing a metal coating on the roughened surface of said substrate, said metal coating being deposited by:
Claim 7
Dependent Claim
30 words
an organic sulphone of the formula: X-SO2-X'' wherein X and X'' are independently selected from alkyl, cyclo alkyl, aryl, aralkyl and alkaryl of about six to about 20 carbon atoms,
Claim 8
Dependent Claim
106 words
in molten lactam soluble inorganic compounds selected from metal halides and phosphates of Group I and II of the Periodic Table, having an electro-depositable metal coating adhered thereto and of a thickness at least in the range of about 0.5 microns to about 1 millimeter, said metal coating being applied to said polyamide substrate by first at least microscopically roughening the surface of said substrate, and secondly depositing the desired metal as a coating thereon, the adhesion of said metal coating to said substrate, as measured in accordance with DIN 40802 Specification at least greater than about 1.0 kilograms per 2.5 centimeter width of said object.
Claim 9
Dependent Claim
46 words
in molten lactam soluble inorganic compounds, selected from metal halides and phosphates of Group I and II of the Periodic Table, ii. hydrolytically polymerizing said molten lactam monomer containing the soluble compound of step (i) homogeneously distributed throughout forming a dispersed phase in the polymerized lactam.
Claim 10
Dependent Claim
11 words
The process of claim 3 wherein the lactam monomer is caprolactam.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |