Patent US3892228A successfully refreshed from Google Patents.
US4362779A
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Process of silvering articles having a base of polyamides
Assignee: Rhone Poulenc Textile SA
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Filing: 1981-05-08
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Granted: 1982-12-07
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Expires: 2001-05-08
Abstract
Abstract Process of silvering articles such as textile articles in order to make them conductive and the articles silvered by this process. The articles are subjected to the action of a reducing agent which swells the substrate and then to the action of an ammoniacal silver nitrate solution. When a polyamide is used as a substrate, a polyphenol is an acceptable reducing agent. Yarns and fibers treated by the process can be used for the manufacture of floor coverings, wall coverings, and articles of clothing as well as for the manufacture of heating articles.
Inventors
- 👤 Andre Arsac
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:28
CPC Classifications
C; C23; C23C; C23C18/00; C23C18/16; C23C18/18; C23C18/20; C23C18/2006; C23C18/2046; C23C18/2053; C23C18/2066; C23C18/2026; C23C18/2033; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31681; Y10T442/00; Y10T442/20; Y10T442/2418; Y10T442/2459
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
102 words
A process for improving the antistatic properties of an article made of a polyamide polymer by covering at least one surface of said polyamide article with a layer of silver consisting essentially of treating at least one surface of said article with an aqueous bath of a polyhydroxy benzene reducing agent which is a swelling agent for said polyamide, with a concentration of about 1% to about 30% by weight at a temperature between room temperature and 90° C. to permit said polyhydroxy benzene reducing agent to swell said polyamide, and then treating the resulting product with an ammoniacal silver nitrate solution.
Claim 2
Dependent Claim
102 words
A process for improving the antistatic properties of an article made of a polyamide polymer by covering at least one surface of said polyamide article with a layer of silver consisting essentially of treating at least one surface of said article with an aqueous bath of a polyhydroxy benzene reducing agent which is a swelling agent for said polyamide, with a concentration of about 1% to about 30% by weight at a temperature between room temperature and 90° C. to permit said polyhydroxy benzene reducing agent to swell said polyamide, and then treating the resulting product with an ammoniacal silver nitrate solution.
Claim 3
Dependent Claim
23 words
The process of claim 1 wherein treatment with said reducing agent is carried out at a temperature between 40° C. and 80° C.
Claim 4
Dependent Claim
14 words
A process of silvering according to claim 1, wherein said polyhydroxy benzene is orthodiphenol.
Claim 5
Dependent Claim
14 words
A process of silvering according to claim 1, wherein said polyhydroxy benzene is 1,4-diphenol.
Claim 6
Dependent Claim
14 words
A process of silvering according to claim 1, wherein said polyhydroxy benzene is 1,3,5-trihydroxybenzene.
Claim 7
Dependent Claim
16 words
The process of claim 1 wherein the articles made of a polyamide polymer are textile articles.
Claim 8
Dependent Claim
10 words
Textile articles antistatically treated by the process of claim 1.
Claim 9
Dependent Claim
23 words
The process of claim 6 wherein said polyhydroxybenzene reducing agent is present at a concentration of about 10% to about 30% by weight.
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) | 1985-12-06 | 1986-06-07 | 1986-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-06 | 1990-06-07 | 1990-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-06 | 1994-06-07 | 1994-12-07 | $7700.00 | Window Closed / Lapsed |