US4416940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Simulated weathered-copper coatings for metal
Assignee: Akzo Nobel Paints LLC
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Filing: 1981-11-30
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Granted: 1983-11-22
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Expires: 2001-11-30
Abstract
Abstract Processes for the application of new water-reducible and solvent-based coatings to various substrates to simultaneously impart copper-like metal and patina coloration to achieve a simulated weathered copper appearance are described, as well as the articles produced thereby. The coatings are preferably applied to a primed metal substrate, especially coil coating stock, in a two-step process comprising a first application of a base coat containing a dominant patina-color-producing colorant followed by application of a top coat applied to the cured base coat, the top coat containing a copper-color-producing colorant. After final cure, the substrate exhibits both a copper metallic appearance by reflection of incident light from the top coat and a patina appearance by transmission of light to and reflection from the base coat.
Inventors
- 👤 Kenneth Loye
- 👤 Gary Julian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:05
CPC Classifications
B; B44; B44F; B44F9/00; B44F9/10; B05; B05D; B05D5/00; B05D5/06; B05D5/067; B05D5/068; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/25; Y10T428/251; Y10T428/256
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
128 words
A two-step process for imparting a simulated weathered-copper appearance to a substrate which comprises first applying an opaque pigmented base coat containing a dominant patina-color-producing colorant to a primed or unprimed substrate; curing said base coat; applying to the cured base coat a non-opaque top coat containing one or more copper-color-producing additives in an amount sufficient to impart a simulated weathered-copper appearance having both a copper metallic appearance by reflection of incident light from said top coat and a patina appearance by transmissiion of light to and reflection from the base coat; said top coat having sufficient transparency toward incident light to allow perception of the patina color of the base coat and simultaneously sufficient copper-color producing additives to allow the reflection of light from the copper-color-producing additives.
Claim 2
Dependent Claim
128 words
A two-step process for imparting a simulated weathered-copper appearance to a substrate which comprises first applying an opaque pigmented base coat containing a dominant patina-color-producing colorant to a primed or unprimed substrate; curing said base coat; applying to the cured base coat a non-opaque top coat containing one or more copper-color-producing additives in an amount sufficient to impart a simulated weathered-copper appearance having both a copper metallic appearance by reflection of incident light from said top coat and a patina appearance by transmissiion of light to and reflection from the base coat; said top coat having sufficient transparency toward incident light to allow perception of the patina color of the base coat and simultaneously sufficient copper-color producing additives to allow the reflection of light from the copper-color-producing additives.
Claim 3
Dependent Claim
72 words
A process according to claim 1 wherein said base coat comprises at least one film-forming binder, an organic carrier for said binder, an opacifying agent, the dominant colorant is a green pigment and other additives sufficient to impart desirable coating characteristics including hiding power, weatherability, opaqueness and patina color; and wherein said top coat comprises at least one film-forming binder, an organic carrier for said binder and at least one copper-color-producing additive.
Claim 4
Dependent Claim
28 words
A process according to claim 1 or 2 wherein the copper-color-producing additive is selected from the group consisting of an ultrafine metallic powder, treated mica, and mixtures thereof.
Claim 5
Dependent Claim
31 words
A process according to claim 3 wherein the film-forming binder consists of a thermoset resin selected from the group consisting of vinyls, styrenes, halogenated vinyls, acrylics, polyesters, urethanes and mixtures thereof.
Claim 6
Dependent Claim
15 words
A process according to claim 4 wherein the film-forming binder is a polyvinylidene fluoride resin.
Claim 7
Dependent Claim
20 words
A process according to claim 4 wherein the film-forming binder comprises a mixture of polyvinylidene fluoride and an acrylic resin.
Claim 8
Dependent Claim
28 words
A process according to claim 6 wherein the film-forming binder comprises from about 50 to 80 weight percent polyvinylidene fluoride and from about 20-50 weight percent acrylic resin.
Claim 9
Dependent Claim
14 words
A process according to claim 6 wherein the treated mica is a non-copper-containing mica.
Claim 10
Dependent Claim
66 words
A process according to claim 1 wherein said base coat comprises at least one film-forming binder, an aqueous carrier for said binder, an opacifying agent and other additives sufficient to impart desirable coating characteristics including hiding power, weatherability, opaqueness and patina color; and wherein said top coat comprises at least one film-forming binder dissolved or dispersed in an aqueous carrier and at least one copper-color-producing additive.
Claim 11
Dependent Claim
27 words
A substrate coated according to the process of claim 1 wherein the substrate is selected from the group consisting of wood, metal, plastic, glass, ceramic and cement.
Claim 12
Dependent Claim
22 words
A coated coil article comprising stock steel metal having an acrylic primer coat and further coated by the process of claim 6.
Claim 13
Dependent Claim
39 words
A process according to claim 6 wherein the copper-color-producing pigment is a mica treated with one or more additives comprising a material selected from the group consisting of carbon black; metal oxides of titanium, zirconium, iron, and mixtures thereof.
Claim 14
Dependent Claim
24 words
A process according to claim 6 wherein the copper-color-producing additive is a finely divided metal powder which has been treated with a leafing composition.
References Cited (Backward Citations)
US2104790A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-11-21 | 1987-05-23 | 1987-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-21 | 1991-05-23 | 1991-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-21 | 1995-05-23 | 1995-11-22 | $7700.00 | Window Closed / Lapsed |