US4208452A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for protecting metallic substrates
Assignee: Grow Group Inc
•
Filing: 1978-09-11
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Granted: 1980-06-17
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Expires: 1998-09-11
Abstract
Abstract Described is a method for protecting metallic substrates which comprises applying thereto silicon containing compositions produced by the steps of: 1. providing a mixture of an organo silicate or a partial hydrolysate thereof in a solvent therefor; 2. adding a weak acid to said mixture and maintaining the pH acidic, preferably at a range from about 1 to about 4; 3. partially hydrolyzing the mixture; and 4. adding a strong acid to said mixture to further hydrolyze the mixture; and curing the composition. The composition may contain also glass flakes.
Inventors
- 👤 William R. Keithler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:48
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/08; C09D5/10; C09D5/106
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
107 words
A method of protecting a metallic substrate subject to corrosion comprising applying to the substrate a galvanic action coating composition comprising glass flakes and a silicon containing composition prepared by (1) mixing a tetra alkoxy silicate containing from 1 to 10 carbon atoms in the alkoxy group or a partial hydrolysate thereof in a water-miscible solvent; (2) adding a weak acid to the mixture and maintaining an acidic pH; (3) partially hydrolyzing the mixture by adding water thereto and (4) adding a strong acid to the mixture to further hydrolyze the mixture; and curing the coating composition resulting in a substantially all inorganic coating on the substrate.
Claim 2
Independent Claim
107 words
A method of protecting a metallic substrate subject to corrosion comprising applying to the substrate a galvanic action coating composition comprising glass flakes and a silicon containing composition prepared by (1) mixing a tetra alkoxy silicate containing from 1 to 10 carbon atoms in the alkoxy group or a partial hydrolysate thereof in a water-miscible solvent; (2) adding a weak acid to the mixture and maintaining an acidic pH; (3) partially hydrolyzing the mixture by adding water thereto and (4) adding a strong acid to the mixture to further hydrolyze the mixture; and curing the coating composition resulting in a substantially all inorganic coating on the substrate.
Claim 3
Dependent Claim
13 words
The method of claim 1 wherein the glass flakes are leafing glass flakes.
Claim 4
Independent Claim
99 words
A method of protecting a metallic substrate subject to corrosion comprising applying to the substrate a galvanic action coating composition prepared by mixing a tetra alkoxy silicate, wherein the alkoxy groups contain from 1 to 10 carbon atoms or a partial hydrolysate thereof in a solvent which is miscible with water; adding a weak acid to said mixture and maintaining an acidic pH; partially hydrolyzing the mixture by adding water thereto and adding a strong acid to said mixture to further hydrolyze the mixture; and curing the coating composition resulting in a substantially all inorganic coating on the substrate.
Claim 5
Independent Claim
99 words
A method of protecting a metallic substrate subject to corrosion comprising applying to the substrate a galvanic action coating composition prepared by mixing a tetra alkoxy silicate, wherein the alkoxy groups contain from 1 to 10 carbon atoms or a partial hydrolysate thereof in a solvent which is miscible with water; adding a weak acid to said mixture and maintaining an acidic pH; partially hydrolyzing the mixture by adding water thereto and adding a strong acid to said mixture to further hydrolyze the mixture; and curing the coating composition resulting in a substantially all inorganic coating on the substrate.
Claim 6
Dependent Claim
20 words
The method of claim 3 wherein the coating is applied at a thickness ranging from about 1 to 10 mils.
Claim 7
Dependent Claim
19 words
The method of claim 3 further comprising applying a glass flake silicon containing coating composition to the treated substrate.
Claim 8
Dependent Claim
20 words
The method of claim 3 wherein the pH of the reaction with the weak acid ranges from 1 to 4.
Claim 9
Dependent Claim
17 words
The method of claim 3 wherein the galvanic action silicon containing coating composition contains particulate zinc oxide.
Claim 10
Dependent Claim
26 words
The method of claim 3 wherein the silicon containing coating composition contains a pigment selected from the group consisting of micaceous iron oxide and calcium silicate.
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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) | 1983-06-17 | 1983-12-17 | 1984-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-06-17 | 1987-12-17 | 1988-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-06-17 | 1991-12-17 | 1992-06-17 | $7700.00 | Window Closed / Lapsed |