Patent US3819425A successfully refreshed from Google Patents.
US3819425A
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Composite coating adherent under shear condition
Assignee: Diamond Shamrock Corp
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Filing: 1972-10-18
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Granted: 1974-06-25
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Expires: 1992-10-18
Abstract
Abstract Composite coatings, applied on metal substrates, maintain excellent adhesion when subjected to shearing forces such as encountered in metal stamping. This adhesion is obtained through first observing careful control over size distribution of particles associated with both the undercoating and the topcoating. Next control is exercised over comparative particle size selection for the undercoating versus the topcoating. Further, maintenance of other composite coating characteristics, e.g., corrosion resistance and impact adhesion, is stressed.
Inventors
- 👤 Ridder J De
- 👤 A Kennedy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:47
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/73; C23C22/74; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12049; Y10T428/12056
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
19 words
The coated metal substrate of claim 1 wherein the coating composition supplying said undercoating is an aqueous conversion coating.
Claim 2
Dependent Claim
17 words
The coated metal substrate of claim 2 wherein said aqueous conversion coating is a phosphate conversion coating.
Claim 3
Dependent Claim
17 words
The coated metal substrate of claim 2 wherein said aqueous conversion coating is a chromate conversion coating.
Claim 4
Dependent Claim
26 words
The coated metal substrate of claim 1 wherein said coating composition for said undercoating is a bonding coating composition containing hexavalent-chromium-providing substance and reducing agent therefore.
Claim 5
Dependent Claim
19 words
The coating composition of claim 5 wherein said reducing agent is supplied by carboxylic acid plus additional organic substance.
Claim 6
Dependent Claim
29 words
The coating composition of claim 6 wherein said acid is dicarboxylic acid and said additional organic substance is selected from the group consisting of succinimide, acrylamide and aspartic acid.
Claim 7
Dependent Claim
45 words
The coated metal substrate of claim 1 wherein said undercoating is from a coating composition containing chromic acid, phosphoric acid, or mixtures thereof and said first particulate substance is a microcrystalline structure obtained by heating the metallic substrate coated with said composition at elevated temperature.
Claim 8
Dependent Claim
42 words
The coated metal substrate of claim 1 wherein said first particulate substance is pulverulent metal and said second particulate substance is pulverulent metal, and each of said metals is selected from the group consisting of zinc, manganese, aluminum, magnesium, and mixtures thereof.
Claim 9
Dependent Claim
77 words
The coated metal substrate of claim 1 wherein said first particulate substance and said second particulate substance are each refractory inorganic substance selected from the group consisting of aluminum oxide, silicon dioxide, ferric oxide, nickel oxide, manganese dioxide, chromic oxide, chromic fluoride, titanium dioxide, zinc oxide, calcium silicate, aluminum silicate, magnesium silicate, silicon carbide, ferric phosphate, calcium sulfite, barium sulfite, calcium sulfate, barium sulfate, carbon black, sand, talc, mica, Wollastonite, Fuller''s earth, diatomaceous earth, and mixtures thereof.
Claim 10
Dependent Claim
60 words
The coated metal substrate of claim 1 wherein the preponderance of particles in said first particulate substance, and the preponderance of particles in said second particulate substance, have size below about 50 microns, and the ratio for the average size of said second particulate substance to the average size of said first particulate substance is between about 1.1:1 and 5:1.
Claim 11
Dependent Claim
75 words
The coated metal substrate of claim 11 further characterized by all of said first particulate substance and all of said second particulate substance having particle size below 50 microns, with the controlled size uniformity for said first particulate substance, and the controlled size uniformity for said second particulate substance, providing each of said substances with size such that above about 75 percent of substance particles have size within a range less than about 10 microns.
Claim 12
Dependent Claim
34 words
The coated metal substrate of claim 12 wherein the ratio of the average size of said second particulate substance to the average size of said first particulate substance is between about 1.2:1 and 3:1.
Claim 13
Independent Claim
185 words
The method of preparing a coated metal substrate having on the surface thereof a composite corrosion resistant coating having enhanced adhesion under shear condition, which method comprises: A. establishing on the surface of said metallic substrate a water insoluble pre-paint undercoating from a coating composition comprising liquid medium and at least one compound, supplying in non-elemental form, an element selected from the group consistiNg of phosphorous, chromium and mixtures thereof, said coating having distributed therethrough, and in substantial uniformity therein, a first particulate substance selected from the group consisting of microcrystalline coating structure, pulverulent component maintaining particulate integrity in said undercoating, and mixtures thereof, with the preponderance of said first particulate substance having substantially controlled size uniformity; B. applying on said undercoating a topcoating containing distributed therethrough, in at least substantial uniformity, a second particulate substance that is a pulverulent component maintaining particulate integrity in said topcoating, the preponderance of said second particulate substance having substantially controlled size uniformity; while, C. controlling the ratio of the average size of said second particulate substance to the average size of said first particulate substance to above 1:1.
Claim 14
Dependent Claim
58 words
The method of claim 14 wherein the preponderance of particles in said first particulate substance, and the preponderance of particles in said second particulate substance, have size below about 50 microns, and said ratio for the average size of said second particulate substance to the average size of said first particulate substance is between about 1.1:1 and 5:1.
Claim 15
Dependent Claim
73 words
The method of claim 15 further characterized by all of said first particulate substance and all of said second particulate substance having particle size below 50 microns, with the controlled size uniformity for said first particulate substance, and the controlled size uniformity for said second particulate substance, providing each of said substances with size such that above about 75 percent of substance particles have size within a range less than about 10 microns.
Claim 16
Dependent Claim
32 words
The method of claim 14 wherein the ratio of the average size of said second particulate substance to the average size of said first particulate substance is between about 1.2:1 and 3:1.
Claim 17
Dependent Claim
46 words
The method of claim 14 wherein said first particulate substance is a pulverulent component maintaining particulate integrity in said undercoating and said pulverulent component is applied to the surface of said metallic substrate separate from the application to said substrate of the undercoating composition liquid medium.
Claim 18
Dependent Claim
34 words
The method of claim 14 wherein said first particulate substance is a pulverulent component supplying said undercoating with from about 50 to about 5,000 milligrams per square foot of coated substrate of pulverulent component.
Claim 19
Dependent Claim
34 words
The method of claim 14 wherein the volatile coating substituents from said undercoating are at least in part volatilized during heating of said undercoating composition at elevated temperature prior to application of said topcoating.
Claim 20
Dependent Claim
16 words
The method of claim 14 further characterized by applying to said topcoating a subsequent paint topcoating.
Claim 21
Dependent Claim
17 words
An undercoated, topcoated, and subsequently paint topcoated metal article prepared according to the method of claim 21.
References Cited (Backward Citations)
US3717509A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-24 | 1977-12-24 | 1978-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-24 | 1981-12-24 | 1982-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-24 | 1985-12-24 | 1986-06-25 | $7700.00 | Window Closed / Lapsed |