US4329381A
Expired / Lapsed
US
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Method for providing corrosion resistance to metal objects
Assignee: Henkel AG and Co KGaA
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Filing: 1979-02-12
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Granted: 1982-05-11
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Expires: 1999-02-12
Abstract
Abstract Method for providing corrosion protective coatings for metal surfaces. The coatings contain conventional coating components to which are added at least one zinc or lead salt of five- or six-membered heterocyclic compounds substituted by at least one hydroxyl or mercapto group and the ring includes at least one nitrogen atom and at least two conjugated double bonds, of which at least one has the formation. ##STR1## as corrosion inhibitors.
Inventors
- 👤 Helmut Eschwey
- 👤 Joachim Galinke, deceased
- 👤 nee Jansen heir Renate Galinke
- 👤 Heinrich Linden
- 👤 Bernd Wegemund
- 👤 Norbert Wiemers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:13
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/08; C09D5/082; C09D5/086; C07; C07D; C07D277/00; C07D277/60; C07D277/62; C07D277/68; C07D277/70; C07D277/72; C09D7/00; C09D7/40; C09D7/45
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
88 words
The method of providing corrosion resistance to a metal object which comprises the steps of applying to said object a layer of a corrosion-protective composition which contains a corrosion-protecting amount of at least one zinc and/or lead salt selected from the group consisting of zinc, lead and mixed lead/zinc salts of mercaptobenzothiazoles, mercaptopyridines, single or polynuclear-s-triazines containing at least one hydroxyl or mercapto group on the triazine ring, cyanuric acid and thiocyanuric acid, in a film-forming vehicle, and then drying said layer to form a continuous coating thereon.
Claim 2
Independent Claim
88 words
The method of providing corrosion resistance to a metal object which comprises the steps of applying to said object a layer of a corrosion-protective composition which contains a corrosion-protecting amount of at least one zinc and/or lead salt selected from the group consisting of zinc, lead and mixed lead/zinc salts of mercaptobenzothiazoles, mercaptopyridines, single or polynuclear-s-triazines containing at least one hydroxyl or mercapto group on the triazine ring, cyanuric acid and thiocyanuric acid, in a film-forming vehicle, and then drying said layer to form a continuous coating thereon.
Claim 3
Dependent Claim
25 words
The method of claim 1 wherein said salt is present in said vehicle in a concentration of range of substantially 0.5% to 10% by weight.
Claim 4
Dependent Claim
16 words
The method of claim 2 wherein said salt concentration range is 1% to 3% by weight.
Claim 5
Dependent Claim
45 words
The method of claim 1 wherein said salt is selected from the group consisting of the zinc, lead and mixed lead/zinc salts of hydantoin, 2,4-dithiohydantoin, 2-mercaptothiazole, 2-mercapto-4-hydroxythiazole, 2-mercaptobenzoxazole, 2-mercaptobenzothiazole, 2-mercaptopyridine, 3-cyano-6-hydroxy-4-methylpyridone-2, barbituric acid, 5-nitroorotic acid, uric acid guanine, xanthine, cyanuric acid, monothiocyanuric acid, dithiocyanuric acid,
Claim 6
Dependent Claim
18 words
4,6-trimercapto-s-triazine, 2,4-dihydroxy-s-triazine, ammelide, monothioammelide, 2,4-dimercapto-6-amino-s-triazine, ammeline, thioammeline, acetothioguanide, acetoguanamide, o-carboxybenzoguanide, oxonic acid, 2-hydroxy-4,6-dimethoxy-s-triazine, 2,4-dihydroxy-6-(p-nitrophenyl)-s-triazine, 2,4-dihydroxy-6-allyloxy-s-triazine, and cyameluric acid.
Claim 7
Dependent Claim
18 words
4,6-trimercapto-s-triazine, 2,4-dihydroxy-s-triazine, ammelide, monothioammelide, 2,4-dimercapto-6-amino-s-triazine, ammeline, thioammeline, acetothioguanide, acetoguanamide, o-carboxybenzoguanide, oxonic acid, 2-hydroxy-4,6-dimethoxy-s-triazine, 2,4-dihydroxy-6-(p-nitrophenyl)-s-triazine, 2,4-dihydroxy-6-allyloxy-s-triazine, and cyameluric acid.
Claim 8
Dependent Claim
29 words
The method of claim 1 wherein said vehicle includes, as the film-forming component, a polymeric resin selected from the group consisting of alkyd resins, epoxy resins and urethane resins.
Claim 9
Dependent Claim
17 words
The method of claim 1 wherein the continuous coating is from substantially 10 to 100 μm thick.
Claim 10
Dependent Claim
17 words
A corrosion-protected metal object having a continuous coating applied in accordance with the method of claim 1.
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) | 1985-05-10 | 1985-11-09 | 1986-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-10 | 1989-11-09 | 1990-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-10 | 1993-11-09 | 1994-05-11 | $7700.00 | Window Closed / Lapsed |