US4138526A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing good adherence between a metal and polysulphide material and articles produced thereby
Assignee: Individual
•
Filing: 1976-12-21
•
Granted: 1979-02-06
•
Expires: 1996-12-21
Abstract
Abstract A process for producing a strong and water-resistant bond between aluminum or an aluminum-based alloy and a polysulphide material by means of a primer which is applied to the metal, characterized in that the primer is a solution of a strongly basic alkali metal compound such as alkali metal hydroxides, phosphates and carbonates. The present invention also includes articles treated by the aforementioned process.
Inventors
- 👤 Thor Borresen
- 👤 Niels U. Harder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:02
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/60; C23C22/66; B; B05; B05D; B05D3/00; B05D3/10; B05D3/102; B05D7/00; B05D7/14; B05D7/16; B05D2202/00; B05D2202/20; B05D2202/25; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31533; Y10T428/31678
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
105 words
In a process for producing a strong and water-resistant bond between aluminum or an aluminum-based alloy and a polysulphide material by means of a primer applied to the metal which comprises coating the aluminum or aluminum-based alloy with a primer, drying the primer, applying a polysulphide material to the metal coated with the primer and permitting the polysulphide coated on the metal to cure; the improvement wherein the primer is applied to the aluminum or aluminum-based alloy and dried without rinsing, prior to the application of the polysulphide thereto and wherein the primer is a solution consisting essentially of a strongly basic alkali metal compound.
Claim 2
Dependent Claim
105 words
In a process for producing a strong and water-resistant bond between aluminum or an aluminum-based alloy and a polysulphide material by means of a primer applied to the metal which comprises coating the aluminum or aluminum-based alloy with a primer, drying the primer, applying a polysulphide material to the metal coated with the primer and permitting the polysulphide coated on the metal to cure; the improvement wherein the primer is applied to the aluminum or aluminum-based alloy and dried without rinsing, prior to the application of the polysulphide thereto and wherein the primer is a solution consisting essentially of a strongly basic alkali metal compound.
Claim 3
Dependent Claim
17 words
The improvement according to claim 1, wherein the alkali metal compound is sodium hydroxide or potassium hydroxide.
Claim 4
Dependent Claim
16 words
The improvement according to claim 1, wherein the alkali metal compound is sodium or potassium phosphate.
Claim 5
Dependent Claim
17 words
The improvement according to claim 1, wherein the alkali metal compound is sodium carbonate or potassium carbonate.
Claim 6
Dependent Claim
25 words
The improvement according to claim 1, wherein the primer is a solution of the alkali metal compound in water, a lower alcohol of mixtures thereof.
Claim 7
Dependent Claim
19 words
The improvement according to claim 1, wherein the metal to be treated is an electrolytically or chemically oxidized metal.
Claim 8
Dependent Claim
20 words
The improvement according to claim 1, wherein the polysulphide material is a polysulphide jointing compound based on a polymercaptan polymer.
Claim 9
Dependent Claim
50 words
Constructional elements of aluminum or an aluminum alloy which are to be used in connection with a polysulphide jointing compound, the improvement wherein a primer of a strongly basic reacting alkali metal compound has been applied to the metal surfaces which are to be contacted with the polysulphide jointing compound.
Claim 10
Dependent Claim
50 words
Constructional elements of aluminum or an aluminum alloy which are to be used in connection with a polysulphide jointing compound, the improvement wherein a primer of a strongly basic reacting alkali metal compound has been applied to the metal surfaces which are to be contacted with the polysulphide jointing compound.
Claim 11
Dependent Claim
17 words
Constructional elements according to claim 8, wherein the aluminum metal is a chemically or electrolytically oxidized metal.
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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) | 1982-02-05 | 1982-08-07 | 1983-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-05 | 1986-08-07 | 1987-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-05 | 1990-08-07 | 1991-02-06 | $7700.00 | Window Closed / Lapsed |